CN113904044A - Battery and electronic device - Google Patents
Battery and electronic device Download PDFInfo
- Publication number
- CN113904044A CN113904044A CN202111166833.1A CN202111166833A CN113904044A CN 113904044 A CN113904044 A CN 113904044A CN 202111166833 A CN202111166833 A CN 202111166833A CN 113904044 A CN113904044 A CN 113904044A
- Authority
- CN
- China
- Prior art keywords
- battery
- layer
- hydrophobic
- area
- battery cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010410 layer Substances 0.000 claims abstract description 106
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000004806 packaging method and process Methods 0.000 claims abstract description 52
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 238000005538 encapsulation Methods 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- -1 polypropylene Polymers 0.000 claims description 11
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000000304 alkynyl group Chemical group 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 125000005010 perfluoroalkyl group Chemical group 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 abstract description 6
- 239000002985 plastic film Substances 0.000 description 19
- 229920006255 plastic film Polymers 0.000 description 19
- 238000000034 method Methods 0.000 description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000012775 heat-sealing material Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000006258 conductive agent Substances 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000002329 infrared spectrum Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
-
- 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
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/141—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against humidity
-
- 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
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/197—Sealing members characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
-
- 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)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a battery and an electronic device. The first aspect of the present invention provides a battery, including a battery cell and a package, where the package includes a battery cell accommodating area for sealing the battery cell and package areas located on four sides of the battery cell accommodating area; the packaging region comprises a heat sealing layer; the end face, far away from the battery core, of the packaging area on at least one side edge of the battery core containing area is provided with a hydrophobic layer, and the hydrophobic layer covers the end face, far away from the battery core, of the heat sealing layer; the water contact angle of the hydrophobic layer is larger than that of the heat sealing layer. According to the invention, the hydrophobic layer is arranged, so that the long-term water vapor permeation resistance of the battery is improved, expensive materials are not required, and the preparation cost of the battery is reduced.
Description
Technical Field
The invention relates to a battery and an electronic device, and relates to the technical field of electrochemistry.
Background
With the development of science and technology, electronic products increasingly enter the aspects of people's life, and the normal use of electronic products is not left from the battery, and the battery refers to the device that can convert chemical energy into electric energy, and as the electric energy source of electronic products, the performance of battery is crucial to electronic products' use.
The conventional battery comprises a battery core and a packaging body for sealing the battery core, and in the use process of the battery, the performance degradation of the battery core caused by the water vapor entering the battery core is one of important reasons for electrical performance failure and packaging failure of the battery core; for the electrical property aspect, the water vapor entering the battery core can cause black spots, water stains, even serious capacity loss and gas generation; in the aspect of packaging, when water vapor enters the battery cell, severe thermal motion in a polymer layer of a packaging body can cause relaxation of a polymer chain segment, even free radicals can be generated to generate thermal-oxidative aging, so that the sealing performance is degraded, meanwhile, gas generation after the water vapor enters the battery cell can improve the internal pressure of the battery cell, further creep damage effect is generated on the degraded packaging body, and gas generation and liquid leakage are accelerated; especially for products requiring long service life in energy storage and power systems, the cumulative water vapor permeation amount reaches a considerable degree after long-term storage under working conditions (especially under high-temperature and high-humidity conditions), and is sufficient to initiate the reactions of the above-listed types.
At present, the water vapor can be prevented from entering the packaging body by improving the waterproof grade of the packaging body (for example, the waterproof grade of a pack shell of a power battery is IP67), however, the cost of the method is high, the effective waterproof time is short, the water vapor still permeates into the electric core for years or even tens of years (for example, the service life requirement of 15 years of energy storage), and the waterproof effect is not ideal.
Disclosure of Invention
The invention provides a battery, which is used for improving the long-term waterproof performance of a packaging body and reducing the preparation cost.
The invention also provides an electronic device which comprises the battery.
A first aspect of the present invention provides a battery, including a battery cell and a package, where the package includes a battery cell accommodating area for sealing the battery cell and package areas located on four sides of the battery cell accommodating area; the encapsulation region comprises a heat seal layer;
the end face, far away from the battery core, of the packaging area on at least one side edge of the battery core containing area is provided with a hydrophobic layer, and the hydrophobic layer covers the end face, far away from the battery core, of the heat sealing layer;
the water contact angle of the hydrophobic layer is larger than that of the heat sealing layer.
According to the battery, the end faces, far away from the battery core, of the packaging areas on the four sides of the battery core containing area are provided with the hydrophobic layers;
the hydrophobic layer is arranged on the outer side edge of the packaging area in a surrounding mode.
According to the battery, the packaging area further comprises metal layers arranged on the two surfaces of the heat sealing layer and a protective layer arranged on the surface, far away from the heat sealing layer, of the metal layer, and the hydrophobic layer covers at least partial end faces, far away from the battery core, of the metal layer and the protective layer.
According to the battery, the heat sealing layer comprises a heat sealing material, and the heat sealing material is polypropylene and a compound thereof;
the hydrophobic layer comprises a hydrophobic material, and the molecular structure of the hydrophobic material comprises one or more of alkyl, alkynyl, aryl, carbonyl, ester, ether, perfluoroalkyl and polysiloxane.
According to the battery, the distance between the end face of the packaging area far away from the battery core and the surface of the hydrophobic layer far away from the packaging area is 10nm-10 microns.
The thickness of the heat sealing layer of the battery is 40-200 μm.
As the above battery, the protective layer comprises a composite of polyamide and polyethylene terephthalate, and the thickness of the protective layer is 10 to 50 μm.
As for the battery, the metal layer comprises one or two of aluminum and steel, and the thickness of the metal layer is 20-50 μm.
As for the above cell, the thickness of the packaging region is 120-300 μm.
The second aspect of the invention provides an electronic device comprising the battery provided by the first aspect of the invention.
According to the invention, the hydrophobic layer is arranged, so that the adsorption constant of water molecules on the end face of the packaging area is reduced, the water molecules are prevented from entering, and the long-term water vapor permeation resistance of the battery is improved; in addition, compared with the method for improving the waterproof grade of the packaging body or other waterproof methods, the cost for arranging the hydrophobic layer is lower, and the preparation cost of the battery is favorably reduced.
The electronic device provided by the invention can effectively prolong the service time of the electronic device and reduce the preparation cost due to the battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a prior art battery;
FIG. 2 is a schematic diagram of a battery package according to the prior art;
FIG. 3 is a schematic diagram of the passage of water molecules into the cell;
fig. 4 is a schematic structural diagram of a package region of a battery according to an embodiment of the invention;
FIG. 5 is a comparison graph of infrared analysis of the end faces of the package regions provided by the prior art and one embodiment of the present invention;
fig. 6 is a test result graph of the water content in the battery cell after the soft package lithium ion battery provided by the embodiment of the invention is stored at 60 ℃ and 95% RH for different time.
Description of reference numerals:
100-electric core;
200-a package;
2100-a package region;
2101-protective layer;
2102-a metal layer;
2103-heat-seal layer;
2104-a hydrophobic layer;
2200-a cell holding area;
300-positive pole tab;
400-negative pole tab.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a battery in the prior art, and as shown in fig. 1, a conventional battery includes a battery cell 100, a package 200 for sealing the battery cell, a positive tab 300, and a negative tab 400, where the battery cell 100 serves as an energy storage component of the battery for an electrochemical reaction, and includes a positive pole piece, a diaphragm, and a negative pole piece; the package body 200 is wrapped outside the battery cell 100 to play a role in sealing the battery cell 100, for a general battery, the package body 200 is formed by an aluminum-plastic film, the conventional aluminum-plastic film comprises a heat sealing layer, a metal layer and a protective layer which are sequentially stacked, in the packaging process, two layers of aluminum-plastic films are covered on two surfaces of the battery cell 100, or the aluminum-plastic films are folded, so that the heat sealing layer in the aluminum-plastic films is positioned at one side close to the battery cell 100, the battery cell 100 is placed in the two opposite layers of aluminum-plastic films, and then the opposite sides are packaged by means such as heat sealing and the like, so that the oppositely arranged heat sealing layers are fused into a whole to form the package body 200; the tab is a metal conductor which leads out the positive electrode and the negative electrode from the battery cell and is divided into a positive tab 300 and a negative tab 400, one end of the positive tab 300 and one end of the negative tab 400 are connected with the battery cell, and the other end of the positive tab 300 and the other end of the negative tab 400 are located outside the packaging body 200.
It can be understood that the package 200 specifically includes a cell accommodating area 2200 for sealing the battery cell and a package area 2100 located on four sides of the cell accommodating area 2200, that is, the cell accommodating area 2200 is used for placing the battery cell 100, the cell accommodating area 2200 has four sides, each side is provided with one package area 2100, taking the package area 2100 on one side of the cell accommodating area 2200 as an example, as shown in fig. 2, since the heat seal layers oppositely disposed by the aluminum-plastic films are melted into a whole after heat sealing, the package area 2100 includes a heat seal layer 2103 melted into a whole, metal layers 2102 disposed on two surfaces of the heat seal layer 2103, and a protective layer 2101 disposed on the surface of the metal layer 2102 far from the heat seal layer 2103, it can be understood that fig. 2 2200 only shows the package area 2100 located on one side of the cell accommodating area, and the structure of the package areas on the other three sides is the same as that in fig. 2.
The deterioration of the cell performance caused by the water vapor entering the cell is one of important reasons for electrical performance failure and cell packaging failure; for the electrical property aspect, the water vapor entering the battery core can cause black spots, water stains, even serious capacity loss and gas generation; in the aspect of packaging, when water vapor enters the battery cell, severe thermal motion in a polymer layer of the packaging body can cause relaxation of a polymer chain segment, even free radicals can be generated to generate thermal-oxidative aging, so that the sealing performance is degraded, meanwhile, gas generation after the water vapor enters the battery cell can increase the internal pressure of the battery cell, further, the creep damage effect is generated on the degraded packaging body, and gas generation and liquid leakage are accelerated.
Through repeated thinking and verification, the inventor finds that a main channel for water molecules to enter the interior of the package body 200 is a heat seal layer 2103 exposed at the end face of the package region far away from the electric core, fig. 3 is a channel schematic diagram for water molecules to enter the electric core, as shown in fig. 3, after the aluminum plastic film is subjected to hot-pressing sealing, the aluminum plastic film with the redundant edge sealing is cut off as required to obtain the package region with a relatively regular outer edge, the end face of the heat seal layer 2103 far away from the electric core is exposed outside and is in contact with the outside air, which is a main channel for water molecules in the air to enter the electric core, the heat seal layer 2103 is generally made of a high-molecular hydrophobic material, but the water molecules on a microcosmic scale can still permeate into the package body 200 through molecular thermal motion, that is to say, the water molecules in the air can be adsorbed on the surface of the heat seal layer 2103 exposed in fig. 3 and finally permeate into the interior of the package body 200 through left end motion.
According to the formula:
wherein m is the mass of water permeating into the battery from the outside; j is the diffusion flux of water vapor,
fick's first law of diffusion; d is the diffusion coefficient of water molecules, and Cs is the concentration of water vapor adsorbed on the outer surface of the aluminum plastic film exposed in the external environment; l is the width of the packaging area; s is the exposed area of the heat sealing layer; t is time. According to the formula, the adsorption capacity of water molecules on the heat sealing layer is reduced by reducing the adsorption constant of the water molecules on the surface of the heat sealing layer, and the Cs value is reduced, so that the mass m of water permeating into the battery from the outside is reduced.
Based on the above analysis, the present invention provides a battery, comprising a battery cell and a package formed by an aluminum plastic film, wherein the package comprises a battery cell accommodating area for sealing the battery cell and package areas located on four sides of the battery cell accommodating area; the encapsulation region comprises a heat seal layer;
the end face, far away from the battery core, of the packaging area on at least one side edge of the battery core containing area is provided with a hydrophobic layer, and the hydrophobic layer covers the end face, far away from the battery core, of the heat sealing layer;
the water contact angle of the hydrophobic layer is larger than that of the heat sealing layer.
The invention provides a battery, on the basis of the existing battery, at least part of the end surface of a packaging area far away from a battery core is provided with a hydrophobic layer which has a better hydrophobic effect than a heat sealing layer, so that the adsorption capacity of water molecules on the end surface of the packaging area is effectively reduced, the water molecules in the air are prevented from entering, and the service life of the battery is prolonged, specifically, the end surface of the packaging area far away from the battery core on at least one side edge of four side edges of a battery core accommodating area 2200 is provided with the hydrophobic layer 2104, fig. 4 is a structural schematic diagram of the packaging area of the battery provided by the embodiment of the invention, as shown in fig. 4, the end surface of the packaging area 2100 far away from the battery core 100 is provided with the hydrophobic layer 2104, and the hydrophobic layer covers the end surface of the heat sealing layer 2103 far away from the battery core, namely, the heat sealing layer 2103 of the end surface of the packaging area 2100 far away from the battery core 100 is not exposed in the air, but the hydrophobic layer 2104 is exposed in the air, and the water contact angle of the hydrophobic layer 2104 is larger than the water contact angle of the heat sealing layer 2103, the technical personnel in the field know that the larger the water contact angle is, the better the hydrophobic property is, that is to say, the hydrophobic property of the hydrophobic layer 2104 is superior to that of the heat-sealing layer 2103, and compared with the heat-sealing layer 2103, the hydrophobic layer 2104 can effectively reduce the adsorption capacity of water molecules on the end face of the packaging area, prevent the water molecules from entering, and improve the long-term waterproof property of the packaging body. According to the invention, the hydrophobic layer is arranged, so that the adsorption constant of water molecules on the end face of the packaging area is greatly reduced, the water molecules are prevented from entering, and the long-term water vapor permeation resistance of the battery is improved; in addition, compared with the method for improving the waterproof grade of the packaging body or other waterproof methods, the cost for arranging the hydrophobic layer is lower, and the preparation cost of the battery is favorably reduced.
In a specific example, end faces, far away from the battery cell, of the encapsulation areas on four sides of the battery cell accommodating area are provided with hydrophobic layers, and the hydrophobic layers are arranged on outer sides of the encapsulation areas in a surrounding manner; that is to say, the end faces of the four encapsulation areas 2100 located on the four sides of the electric core accommodation area 2200 and far away from the electric core are all provided with the hydrophobic layer 2104, the encapsulation body 200 does not have the heat seal layer 2103 exposed in the air, the hydrophobic layer 2104 forms an annular structure and surrounds the outer side edge arranged on the encapsulation area 2100, the area of the heat seal layer exposed in the air is reduced by improving the arrangement area of the hydrophobic layer, and the waterproof effect of the encapsulation body is further improved.
In a specific example, the encapsulation area further includes metal layers disposed on two surfaces of the heat-sealing layer, and a protection layer disposed on a surface of the metal layer away from the heat-sealing layer, and the hydrophobic layer covers at least partial end faces of the metal layer and the protection layer away from the battery cell; that is, the coverage area of the hydrophobic layer 2104 on the end surface of the package area 2100 on one side of the cell holding area 2200 away from the cell 100 is increased, and extends from the covering heat-seal layer 2103 to the covering part metal layer 2102 and the protective layer 2101, which contributes to further improving the waterproof effect of the package.
In one embodiment, the heat-sealing layer comprises a heat-sealing material, the conventional heat-sealing material is polypropylene (PP) and a composite thereof, and the main function of the heat-sealing material is to bond and prevent the electrolyte from directly contacting the metal layer.
In one embodiment, the hydrophobic material may be a common material such as lubricating oil, engine oil, or the like.
The components of the end face of the packaging area are analyzed by infrared, and fig. 5 is an infrared analysis comparison graph of the end face of the packaging area provided by the prior art and an embodiment of the invention, wherein (a) is an infrared analysis graph of the end face of the packaging area provided by the prior art, and (b) is an infrared analysis comparison graph of the end face of the packaging area provided by an embodiment of the invention, as shown in fig. 5, as the consumption of the hydrophobic material is extremely small, the infrared spectrum main body of (b) is consistent with the spectrum of (a) a normal sample, and is the infrared spectrum of polypropylene, but an obvious carbonyl peak is detected on the infrared spectrum of the aluminum plastic film provided with the hydrophobic layer, and the hydrophobic layer comprising the carbonyl is beneficial to improving the waterproof performance of the packaging body.
In a specific example, with continued reference to fig. 4, a distance H between an end surface of the encapsulation area away from the cell and a surface of the hydrophobic layer away from the encapsulation area1Is 10nm-10 μm.
The thickness of the heat-sealing layer, the metal layer and the protective layer in the packaging region is determined by the thickness of the aluminum-plastic film and the hot-pressing toolThe thickness H of the heat-sealing layer2Is 40-200 μm, and the heat sealing layer is located in the packaging region and is obtained by melting the oppositely arranged heat sealing layers together after hot pressing.
The metal layers are arranged on two functional surfaces of the heat sealing layer, the metal layers comprise one or two of aluminum and steel, and the thickness of the metal layers is 20-50 mu m.
The protective layer is arranged on the surface of the metal layer far away from the heat sealing layer and comprises a composite of polyamide and polyethylene terephthalate, and the thickness of the protective layer is 10-50 mu m.
The total thickness of the packaging region is 120-300 μm, i.e. the total thickness H of the heat sealing layer, the two metal layers and the two protective layers in the packaging region3Is 120-300 μm.
In summary, the present invention provides a detailed description of the package region, and both the aluminum plastic film outside the package region and the battery cell can be performed according to the conventional technical means in the art, for example, the aluminum plastic film outside the package region, that is, the aluminum plastic film on both surfaces of the battery cell, sequentially includes the heat sealing layer, the metal layer and the protective layer from the side close to the battery cell to the side away from the battery cell, and the materials of the heat sealing layer, the metal layer and the protective layer are as described above.
The battery cell comprises a positive plate, a diaphragm and a negative plate which are sequentially stacked or wound, and the size of the battery cell accommodating area can be adjusted according to the size of the battery cell in the specific implementation process.
Further, the positive plate includes a positive current collector and a positive active layer disposed on at least one functional surface of the positive current collector, the positive current collector is generally an aluminum foil, the positive active layer includes a positive active material, a conductive agent and a binder, and the positive active material includes one or more of LCO, LMO, LFP, NCM and NCA.
The negative plate comprises a negative current collector and a negative active layer arranged on at least one functional surface of the negative current collector, the negative current collector is generally a copper foil, the negative active layer comprises a negative active substance, a conductive agent, a binder and a dispersing agent, the negative active substance comprises one or more of graphite, lithium carbonate, a silicon-oxygen compound and a silicon-carbon compound, and the dispersing agent is selected from sodium carboxymethylcellulose.
In a specific example, the types of the conductive agent and the binder in the positive electrode active layer and the negative electrode active layer are the same, and specifically, the conductive agent is selected from one or more of conductive carbon black, acetylene black, ketjen black, conductive graphite, conductive carbon fiber, carbon nanotube, metal powder, and carbon fiber; the binder is selected from one or more of polyvinylidene fluoride (PVDF), Polytetrafluoroethylene (PTFE) and lithium Polyacrylate (PAALi).
In a specific example, the battery further includes a positive electrode tab 300 and a negative electrode tab 400, one end of the positive electrode tab 300 and one end of the negative electrode tab 400 are connected to the battery cell 100, and the other end is located outside the package body 200. Specifically in the course of working, for the convenience of stretching out of utmost point ear, can arrange electric core holding district in earlier in, it is outside to make other end utmost point ear be located the plastic-aluminum membrane, then encapsulates again to both guaranteed the sealed structure all around of packaging body, can realize again that the utmost point ear other end stretches out the packaging body.
The preparation process of the battery in the embodiment of the invention can be carried out according to conventional technical means, for example, a positive pole piece and a negative pole piece are prepared, a battery core is prepared according to a lamination process or a winding process, then one end of a positive pole lug and one end of a negative pole lug are connected with the battery core, an aluminum-plastic film is wrapped on the battery core, the other ends of the positive pole lug and the negative pole lug are positioned outside the aluminum-plastic film, and finally, a hot pressing process is adopted to fuse heat sealing layers in two opposite aluminum-plastic films into a whole, so that the battery in the embodiment is obtained.
In order to verify the waterproof performance of the battery provided by the invention, a soft package lithium ion battery is taken as an example for testing, specifically, 30 conventional soft package lithium ion batteries (not including a hydrophobic layer) and 30 soft package lithium ion batteries (including the hydrophobic layer) provided by the invention are selected, stored at 60 ℃ and 95% RH, 10 samples are taken every 10 days, and the content of water entering the battery cores is tested by a Karl Fischer method (note: in the experiment, the difference of two groups of battery cores is only that whether the waterproof layer is coated or not, the materials, the system and other processes are consistent, and a single factor experiment is carried out).
Fig. 6 is a test result diagram of the water content in the battery cell after the soft package lithium ion battery provided by an embodiment of the present invention is stored at 60 ℃ and 95% RH for different periods, as shown in fig. 6, the initial water content in the battery cell is about 1.7ppm, and the water content entering the battery cell from the normal battery cell is approximately linearly increased along with the extension of the storage time, whereas after the soft package lithium ion battery provided by the present invention is stored for 30 days under the high temperature and high humidity condition, the water content in the battery cell is almost the same as the initial water content, almost no water permeates into the battery cell during 30 days, and the surface of the soft package lithium ion battery is provided with the hydrophobic layer on the end surface of the encapsulation area, which helps to block water vapor permeation, and improves the long-term storage effect of the soft package lithium ion battery.
A second aspect of the invention provides an electronic device comprising a battery as provided in the first aspect of the invention. The electronic device of the present invention is not limited in kind, and may specifically include, but not limited to, a mobile phone, a desktop computer, a notebook computer, a power automobile, an electric bicycle, a digital camera, an intelligent appliance, and the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A battery is characterized by comprising a battery cell and a packaging body, wherein the packaging body comprises a battery cell accommodating area for sealing the battery cell and packaging areas positioned on four sides of the battery cell accommodating area; the encapsulation region comprises a heat seal layer;
the end face, far away from the battery core, of the packaging area on at least one side edge of the battery core containing area is provided with a hydrophobic layer, and the hydrophobic layer covers the end face, far away from the battery core, of the heat sealing layer;
the water contact angle of the hydrophobic layer is larger than that of the heat sealing layer.
2. The battery of claim 1, wherein end faces, away from the battery cell, of the encapsulation regions on four sides of the cell accommodating region are provided with hydrophobic layers;
the hydrophobic layer is arranged on the outer side edge of the packaging area in a surrounding mode.
3. The battery of claim 1 or 2, wherein the encapsulation region further comprises metal layers disposed on two surfaces of the heat-sealing layer, and a protective layer disposed on a surface of the metal layer away from the heat-sealing layer, and the hydrophobic layer covers at least partial end surfaces of the metal layers and the protective layer away from the battery cell.
4. The cell defined in any one of claims 1-3, wherein the heat seal layer comprises a heat seal material, the heat seal material being polypropylene and composites thereof;
the hydrophobic layer comprises a hydrophobic material, and the molecular structure of the hydrophobic material comprises one or more of alkyl, alkynyl, aryl, carbonyl, ester, ether, perfluoroalkyl and polysiloxane.
5. The battery according to any one of claims 1-4, wherein the distance between the end surface of the encapsulation area far away from the cell and the surface of the hydrophobic layer far away from the encapsulation area is 10nm-10 μm.
6. The battery according to any one of claims 1 to 4, wherein the thickness of the heat-seal layer is 40 to 200 μm.
7. The battery according to claim 3, wherein the protective layer comprises a composite of polyamide and polyethylene terephthalate, and the protective layer has a thickness of 10-50 μm.
8. The battery of claim 3, wherein the metal layer comprises one or both of aluminum and steel, and the metal layer has a thickness of 20-50 μm.
9. The battery according to any one of claims 1 to 8, wherein the thickness of the encapsulation region is 120-300 μm.
10. An electronic device, characterized in that the electronic device comprises a battery according to any of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111166833.1A CN113904044A (en) | 2021-09-30 | 2021-09-30 | Battery and electronic device |
| PCT/CN2022/121903 WO2023051558A1 (en) | 2021-09-30 | 2022-09-27 | Battery and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111166833.1A CN113904044A (en) | 2021-09-30 | 2021-09-30 | Battery and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113904044A true CN113904044A (en) | 2022-01-07 |
Family
ID=79190147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111166833.1A Pending CN113904044A (en) | 2021-09-30 | 2021-09-30 | Battery and electronic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113904044A (en) |
| WO (1) | WO2023051558A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051558A1 (en) * | 2021-09-30 | 2023-04-06 | 珠海冠宇电池股份有限公司 | Battery and electronic apparatus |
| CN117239251A (en) * | 2023-10-19 | 2023-12-15 | 宁夏宝丰昱能科技有限公司 | Manufacturing process of square battery and square battery |
Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002245983A (en) * | 2001-02-19 | 2002-08-30 | Dainippon Printing Co Ltd | Material for wrapping lithium ion battery |
| JP2007080733A (en) * | 2005-09-15 | 2007-03-29 | Sharp Corp | Non-aqueous power storage device |
| CN102602081A (en) * | 2012-03-16 | 2012-07-25 | 东莞市恒雅包装材料有限公司 | Anti-corrosion, anti-puncture and anti-short circuit melting through aluminum-plastic packaging film for lithium battery and manufacture method thereof |
| DE102011088636A1 (en) * | 2011-12-15 | 2013-06-20 | Robert Bosch Gmbh | Hard shell housing with superhydrophobic material |
| CN104086740A (en) * | 2014-07-09 | 2014-10-08 | 温州柯莱恩科技有限公司 | Method for preparing organic silicon graft modified polyurethane resin for synthetic leather |
| CN105428556A (en) * | 2015-12-26 | 2016-03-23 | 乐凯胶片股份有限公司 | Lithium ion battery flexible package film |
| CN206059445U (en) * | 2016-07-01 | 2017-03-29 | 深圳市百泉河实业有限公司 | A kind of lithium ion battery outer cover material |
| CN206076291U (en) * | 2016-09-26 | 2017-04-05 | 东莞市卓越新材料科技有限公司 | A kind of aluminum plastic film for being easy to encapsulate |
| CN107086276A (en) * | 2017-04-25 | 2017-08-22 | 北京卫蓝新能源科技有限公司 | A kind of packaging material for battery and the battery containing the material |
| CN206619617U (en) * | 2017-03-07 | 2017-11-07 | 宁德新能源科技有限公司 | Soft-package battery |
| WO2018049574A1 (en) * | 2016-09-13 | 2018-03-22 | 东莞新能源科技有限公司 | Edge sealing structure of battery |
| CN108428809A (en) * | 2017-02-15 | 2018-08-21 | 宁德新能源科技有限公司 | Soft-package battery |
| US20180269472A1 (en) * | 2017-03-17 | 2018-09-20 | Kabushiki Kaisha Toshiba | Secondary battery, battery pack, and vehicle |
| CN108659594A (en) * | 2018-05-21 | 2018-10-16 | 安徽琦家科技股份有限公司 | A kind of waterproof automatically cleaning silicone resin coating and preparation method thereof |
| CN208323467U (en) * | 2018-06-22 | 2019-01-04 | 湖北宇隆新能源有限公司 | A kind of cell aluminum-plastic membrane trimming device |
| CN109436920A (en) * | 2018-09-28 | 2019-03-08 | 桑顿新能源科技有限公司 | A kind of Soft Roll power battery aluminum plastic film cutting device and its method |
| CN109473730A (en) * | 2018-11-01 | 2019-03-15 | 惠州市超聚电池有限公司 | A kind of button cell production method and button cell |
| CN109575228A (en) * | 2018-10-29 | 2019-04-05 | 合肥科天水性科技有限责任公司 | A kind of polyurethane resin and its preparation method and application |
| CN110590987A (en) * | 2019-09-25 | 2019-12-20 | 华南理工大学 | Fluorine-silicon copolymerized acrylic resin and preparation method and application thereof |
| CN210092147U (en) * | 2019-07-05 | 2020-02-18 | 珠海冠宇电池有限公司 | Soft package lithium ion battery edge sealing structure |
| CN111152520A (en) * | 2019-12-26 | 2020-05-15 | 东莞维科电池有限公司 | Lithium ion battery packaging film and preparation method thereof |
| CN111403812A (en) * | 2020-03-06 | 2020-07-10 | 惠州锂威新能源科技有限公司 | Edge sealing optimization process |
| CN211088324U (en) * | 2020-01-13 | 2020-07-24 | 恒大新能源技术(深圳)有限公司 | Aluminum plastic film and soft package battery |
| CN111704696A (en) * | 2020-06-24 | 2020-09-25 | 新乡学院 | Preparation method of fluorine-silicon grafted modified acrylic resin |
| CN112542639A (en) * | 2020-12-08 | 2021-03-23 | 珠海冠宇电池股份有限公司 | Soft package battery and preparation method thereof |
| CN212967843U (en) * | 2020-08-18 | 2021-04-13 | 欣旺达电动汽车电池有限公司 | Square power battery cell |
| CN113097608A (en) * | 2021-03-29 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
| CN214411331U (en) * | 2021-03-29 | 2021-10-15 | 珠海冠宇电池股份有限公司 | Lithium battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904044A (en) * | 2021-09-30 | 2022-01-07 | 珠海冠宇电池股份有限公司 | Battery and electronic device |
-
2021
- 2021-09-30 CN CN202111166833.1A patent/CN113904044A/en active Pending
-
2022
- 2022-09-27 WO PCT/CN2022/121903 patent/WO2023051558A1/en unknown
Patent Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002245983A (en) * | 2001-02-19 | 2002-08-30 | Dainippon Printing Co Ltd | Material for wrapping lithium ion battery |
| JP2007080733A (en) * | 2005-09-15 | 2007-03-29 | Sharp Corp | Non-aqueous power storage device |
| DE102011088636A1 (en) * | 2011-12-15 | 2013-06-20 | Robert Bosch Gmbh | Hard shell housing with superhydrophobic material |
| CN102602081A (en) * | 2012-03-16 | 2012-07-25 | 东莞市恒雅包装材料有限公司 | Anti-corrosion, anti-puncture and anti-short circuit melting through aluminum-plastic packaging film for lithium battery and manufacture method thereof |
| CN104086740A (en) * | 2014-07-09 | 2014-10-08 | 温州柯莱恩科技有限公司 | Method for preparing organic silicon graft modified polyurethane resin for synthetic leather |
| CN105428556A (en) * | 2015-12-26 | 2016-03-23 | 乐凯胶片股份有限公司 | Lithium ion battery flexible package film |
| CN206059445U (en) * | 2016-07-01 | 2017-03-29 | 深圳市百泉河实业有限公司 | A kind of lithium ion battery outer cover material |
| WO2018049574A1 (en) * | 2016-09-13 | 2018-03-22 | 东莞新能源科技有限公司 | Edge sealing structure of battery |
| CN206076291U (en) * | 2016-09-26 | 2017-04-05 | 东莞市卓越新材料科技有限公司 | A kind of aluminum plastic film for being easy to encapsulate |
| CN108428809A (en) * | 2017-02-15 | 2018-08-21 | 宁德新能源科技有限公司 | Soft-package battery |
| CN206619617U (en) * | 2017-03-07 | 2017-11-07 | 宁德新能源科技有限公司 | Soft-package battery |
| US20180269472A1 (en) * | 2017-03-17 | 2018-09-20 | Kabushiki Kaisha Toshiba | Secondary battery, battery pack, and vehicle |
| CN107086276A (en) * | 2017-04-25 | 2017-08-22 | 北京卫蓝新能源科技有限公司 | A kind of packaging material for battery and the battery containing the material |
| CN108659594A (en) * | 2018-05-21 | 2018-10-16 | 安徽琦家科技股份有限公司 | A kind of waterproof automatically cleaning silicone resin coating and preparation method thereof |
| CN208323467U (en) * | 2018-06-22 | 2019-01-04 | 湖北宇隆新能源有限公司 | A kind of cell aluminum-plastic membrane trimming device |
| CN109436920A (en) * | 2018-09-28 | 2019-03-08 | 桑顿新能源科技有限公司 | A kind of Soft Roll power battery aluminum plastic film cutting device and its method |
| CN109575228A (en) * | 2018-10-29 | 2019-04-05 | 合肥科天水性科技有限责任公司 | A kind of polyurethane resin and its preparation method and application |
| CN109473730A (en) * | 2018-11-01 | 2019-03-15 | 惠州市超聚电池有限公司 | A kind of button cell production method and button cell |
| CN210092147U (en) * | 2019-07-05 | 2020-02-18 | 珠海冠宇电池有限公司 | Soft package lithium ion battery edge sealing structure |
| CN110590987A (en) * | 2019-09-25 | 2019-12-20 | 华南理工大学 | Fluorine-silicon copolymerized acrylic resin and preparation method and application thereof |
| CN111152520A (en) * | 2019-12-26 | 2020-05-15 | 东莞维科电池有限公司 | Lithium ion battery packaging film and preparation method thereof |
| CN211088324U (en) * | 2020-01-13 | 2020-07-24 | 恒大新能源技术(深圳)有限公司 | Aluminum plastic film and soft package battery |
| CN111403812A (en) * | 2020-03-06 | 2020-07-10 | 惠州锂威新能源科技有限公司 | Edge sealing optimization process |
| CN111704696A (en) * | 2020-06-24 | 2020-09-25 | 新乡学院 | Preparation method of fluorine-silicon grafted modified acrylic resin |
| CN212967843U (en) * | 2020-08-18 | 2021-04-13 | 欣旺达电动汽车电池有限公司 | Square power battery cell |
| CN112542639A (en) * | 2020-12-08 | 2021-03-23 | 珠海冠宇电池股份有限公司 | Soft package battery and preparation method thereof |
| CN113097608A (en) * | 2021-03-29 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
| CN214411331U (en) * | 2021-03-29 | 2021-10-15 | 珠海冠宇电池股份有限公司 | Lithium battery |
Non-Patent Citations (1)
| Title |
|---|
| 张向宇: "《实用化学手册》", 1 October 2011, 国防工业出版社, pages: 511 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051558A1 (en) * | 2021-09-30 | 2023-04-06 | 珠海冠宇电池股份有限公司 | Battery and electronic apparatus |
| CN117239251A (en) * | 2023-10-19 | 2023-12-15 | 宁夏宝丰昱能科技有限公司 | Manufacturing process of square battery and square battery |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023051558A1 (en) | 2023-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2240978B1 (en) | All-solid lithium secondary battery | |
| CA2673955C (en) | Solid-state battery | |
| KR100999203B1 (en) | Bipolar battery and assembled battery | |
| WO2023051558A1 (en) | Battery and electronic apparatus | |
| WO2014148858A1 (en) | Secondary battery having improved energy density | |
| US20090142660A1 (en) | Sealed battery, and vehicle equipped therewith | |
| RU2520575C1 (en) | Flat-type battery | |
| JP7468233B2 (en) | Energy Storage Module | |
| JP2013543629A (en) | Advanced high durability lithium-ion battery | |
| US10651446B2 (en) | Battery and manufacturing method of the same | |
| US6623891B2 (en) | Polymer electrolyte battery of high mechanical strength and high heat resistance, and method for producing the polymer electrolyte battery | |
| CN110474013B (en) | Method for preparing battery tab packaging structure and method for preparing lithium battery | |
| JP2022030965A (en) | Power storage device | |
| CN115461909A (en) | Electrochemical device and electronic device comprising same | |
| KR101436641B1 (en) | Secondary battery comprising vacuum water-blocking part and method of producing the same | |
| JP5849927B2 (en) | Lithium ion secondary battery and method for producing lithium ion secondary battery | |
| CN113851792B (en) | Soft package lithium ion battery and electronic device | |
| US20240145865A1 (en) | Secondary battery | |
| JP2023521004A (en) | Secondary battery and its repair method | |
| EP4254589A1 (en) | Electricity storage device | |
| Matsumura et al. | TAB-Lead for Automotive Lithium-ion Batteries | |
| JP3561580B2 (en) | Paper battery using solid polymer electrolyte | |
| US20230268572A1 (en) | Electricity storage device | |
| JP2024058781A (en) | Secondary battery leakage inspection method | |
| CN113871808A (en) | Soft package lithium ion battery and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |