CN114079125A - Battery cell, manufacturing method thereof, battery and electronic equipment - Google Patents
Battery cell, manufacturing method thereof, battery and electronic equipment Download PDFInfo
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- CN114079125A CN114079125A CN202010797685.2A CN202010797685A CN114079125A CN 114079125 A CN114079125 A CN 114079125A CN 202010797685 A CN202010797685 A CN 202010797685A CN 114079125 A CN114079125 A CN 114079125A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000001746 injection moulding Methods 0.000 claims abstract description 55
- 239000003792 electrolyte Substances 0.000 claims abstract description 44
- 238000007731 hot pressing Methods 0.000 claims abstract description 36
- 239000012778 molding material Substances 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 23
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 238000005253 cladding Methods 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 210000004027 cell Anatomy 0.000 claims description 64
- 210000005056 cell body Anatomy 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 19
- 239000012528 membrane Substances 0.000 claims description 12
- -1 polypropylene Polymers 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 claims description 3
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 3
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 2
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006336 epoxy molding compound Polymers 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The disclosure provides a battery cell, a manufacturing method of the battery cell, a battery and electronic equipment. The manufacturing method of the battery cell comprises the following steps: through getting rid of the moisture in the naked electric core, carry out the hot pressing to the naked electric core after getting rid of moisture, soak the naked electric core after the hot pressing in electrolyte, to the naked electric core of inhaling the electrolyte and mould plastics the processing to make the naked electric core surface of inhaling electrolyte by the material cladding of moulding plastics, obtain finished product electricity core. The quantity of the injection molding material can be controlled in the injection molding process, so that the formed injection molding film for packaging the naked electric core has a smaller size, and further the finished product electric core has a smaller size, and the structural design of the battery is facilitated.
Description
Technical Field
The disclosure relates to the technical field of electronic equipment, and in particular relates to a battery cell, a manufacturing method of the battery cell, a battery and electronic equipment.
Background
At present, use prefabricated encapsulation membrane or encapsulation casing to seal the encapsulation to naked electric core to make naked electric core and external isolated. For example, a prefabricated aluminum-plastic film or an aluminum shell is used for sealing and packaging the lithium ion bare cell.
However, the bare cell is sealed and packaged by using the method, and the size of the packaging structure is large, so that the size of the finished cell is large, and the structural design of the battery is not facilitated.
Disclosure of Invention
The present disclosure provides an improved battery cell, a manufacturing method thereof, a battery and an electronic device.
According to a first aspect of the embodiments of the present disclosure, a method for manufacturing a battery cell is provided, where the method includes:
removing moisture in the bare cell;
carrying out hot pressing treatment on the bare cell after the moisture is removed;
immersing the bare cell subjected to the hot pressing treatment into electrolyte;
and carrying out injection molding treatment on the naked electric core sucked with the electrolyte so as to enable the surface of the naked electric core sucked with the electrolyte to be coated with an injection molding material, thereby obtaining a finished product electric core.
Optionally, the bare cell includes a cell body and a tab, and the tab is connected to the cell body; the suction the naked electric core of electrolyte carries out the processing of moulding plastics, include:
and performing injection molding treatment on the battery cell body which absorbs the electrolyte and part of the lugs close to the battery cell body so as to coat the surface of the battery cell body and the surface of the part of the lugs by the injection molding material.
Optionally, the tab is connected with the top surface of the cell body; the injection molding material coated on the surface of the battery cell body and the surface of the partial tab forms an injection molding film; wherein,
the thickness ranges of the injection molding films coated on the front surface and the back surface of the battery cell body are respectively 20-130 um;
the thickness range of the injection molding film coated on the side surface of the battery cell body is 20-1000 um;
the cladding is in the thickness scope of the injection molding membrane of the top surface of electricity core body and bottom surface is 50um-2000um respectively.
Optionally, the naked electric core of inhaling electrolyte carries out the processing of moulding plastics, includes:
and using a transparent injection molding material to inject the naked electric core of the electrolyte so as to enable the naked electric core surface of the electrolyte to be sucked to be coated by the transparent injection molding material.
Optionally, the transparent injection molding material comprises at least one of: polymethyl methacrylate, polystyrene, polycarbonate, styrene-methyl methacrylate copolymer, polypropylene, polyethylene terephthalate.
Optionally, the removing moisture in the bare cell includes:
and vacuum baking the naked electric core to ensure that the moisture content in the vacuum baked naked electric core is less than or equal to 150 ppm.
Optionally, the bare electric core after removing moisture is subjected to hot pressing treatment, including:
carrying out hot-pressing treatment on the bare cell subjected to moisture removal in an anhydrous environment, wherein the conditions of the hot-pressing treatment comprise: the hot pressing temperature is 70-100 ℃, and the hot pressing pressure is 0.6-2.0 Mpa.
Optionally, immerse naked electric core after the hot pressing treatment in electrolyte, include:
and immersing the bare cell subjected to the hot pressing treatment into electrolyte for 12-30 h at 15-45 ℃.
According to a second aspect of embodiments of the present disclosure, there is provided a battery cell fabricated according to the method of any of the above first aspects.
According to a third aspect of the embodiments of the present disclosure, a battery is provided, which includes the battery cell of the second aspect.
According to a fourth aspect of embodiments of the present disclosure, there is provided an electronic device including the battery of the third aspect described above.
The technical scheme provided by the disclosure at least has the following beneficial effects:
in this disclosed embodiment, through getting rid of the moisture in the naked electric core, carry out the hot pressing to the naked electric core after getting rid of moisture, with the naked electric core after the hot pressing soak in electrolyte, to the naked electric core of inhaling electrolyte the processing of moulding plastics to make the naked electric core surface of inhaling electrolyte by the material cladding of moulding plastics, obtain finished product electricity core. The quantity of the injection molding material can be controlled in the injection molding process, so that the formed injection molding film for packaging the naked electric core has a smaller size, and further the finished product electric core has a smaller size, and the structural design of the battery is facilitated.
Drawings
Fig. 1 is a flow chart illustrating a method for manufacturing a battery cell according to an exemplary embodiment;
fig. 2 is a schematic diagram illustrating a method for manufacturing a battery cell according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprises" or "comprising" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
Fig. 1 is a flowchart illustrating a method for manufacturing a battery cell according to an exemplary embodiment. Referring to fig. 1, the method includes steps 101 to 104.
In step 101, moisture in the bare cell is removed.
There is moisture in the naked electric core, and moisture can influence the use of electric core. When the electric core is manufactured, firstly, the moisture in the naked electric core is removed.
In some embodiments, the bare cell may be vacuum baked to remove moisture from the bare cell.
Experimental data shows that when the moisture content in the naked battery cell after vacuum baking is less than or equal to 150ppm, the performance of the manufactured battery cell is stable.
In step 102, the bare cell after moisture removal is subjected to hot pressing.
Some bare cells include pole pieces and separators. The purpose of carrying out the hot pressing treatment on the naked electric core after removing the moisture is as follows: the pole piece and the diaphragm in the naked electric core are fully bonded together.
In some embodiments, the bare cell after moisture removal may be subjected to a hot pressing treatment in an anhydrous environment, where the conditions of the hot pressing treatment include: the hot pressing temperature is 70-100 ℃, and the hot pressing pressure is 0.6-2.0 Mpa.
In step 103, the bare cell after the hot pressing treatment is immersed in the electrolyte.
For lithium ion batteries, the electrolyte includes a solvent, a solute, and an additive, for example, the solvent may include at least one of: EC (Ethyl cellulose), PC (Polycarbonate), DMC (Dimethyl Carbonate), EMC (Epoxy Molding Compound); the solute may include a lithium salt, such as LiPF6(ii) a The additive may include at least one of: FEC (Fluoroethylene Carbonate), VC (Vinylene Carbonate), PS (Polystyrene ).
When the lithium ion battery cell is manufactured, the lithium ion bare cell after the hot pressing treatment can be immersed into corresponding electrolyte.
In some embodiments, the bare cell after the hot pressing treatment may be immersed in the electrolyte for a time ranging from 12 hours to 30 hours and at a temperature ranging from 15 ℃ to 45 ℃.
By adopting the soaking condition, the bare cell can absorb sufficient electrolyte.
The soaking condition can be set according to parameters such as the type of the naked electric core, the type of the electrolyte and the like.
In step 104, the naked electric core sucking the electrolyte is subjected to injection molding treatment, so that the surface of the naked electric core sucking the electrolyte is coated by the injection molding material, and a finished product electric core is obtained.
Form the membrane of moulding plastics on naked electric core surface after moulding plastics, seal the encapsulation to naked electric core through the membrane of moulding plastics.
In the traditional technology of using the plastic-aluminum membrane to encapsulate the naked battery of lithium ion, with the plastic-aluminum membrane fifty percent discount, arrange the naked battery of lithium ion in the space that folding aluminum-plastic membrane formed, then seal three limit, can fold two sides after the sealing, in order to reduce the shared space of electric core, because there is utmost point ear isotructure at the top, consequently, inconvenient folding the last sealed limit, it has taken certain space to go up the sealed limit, the space that the top seal structure that leads to electric core occupies is great, and then the space that leads to electric core to occupy is great, be unfavorable for the structural design of battery.
When the method provided by the embodiment of the disclosure is adopted to manufacture the battery core, the using amount of the injection molding material can be controlled, so that the formed injection molding film for packaging the naked battery core has a smaller size, and the finished product battery core has a smaller size, thereby being beneficial to the structural design of the battery.
Experimental result shows, compare in adopting traditional technology to encapsulate naked electric core, adopt the injection moulding process in this disclosure to encapsulate naked electric core, reduced the top seal structure's of electric core height, reduced the space that the top seal structure of electric core occupy. The top sealing height when the traditional process is adopted for sealing is more than 2.5mm, while the top sealing height when the injection molding process in the embodiment of the disclosure is adopted for sealing is less than 2mm, and the top sealing height is obviously reduced.
Naked electric core includes pole piece and diaphragm, and after moulding plastics, the diaphragm is glued completely by the membrane of moulding plastics, can not take place because of the diaphragm contracts in and leads to the problem of short circuit, has improved the security performance of electric core.
In some embodiments, the bare cell includes a cell body and a tab, and the tab is connected to the cell body. The injection molding treatment can be carried out on the battery cell body which absorbs the electrolyte and part of the lugs close to the battery cell body, so that the surface of the battery cell body and the surface of part of the lugs are coated by the injection molding material.
The tab can be fixed on the cell body.
The injection mold formed by injection molding materials can strictly seal the cell body and part of the pole lugs.
In some embodiments, the bare cell includes a cell body and a tab, and the tab is connected to the top surface of the cell body. The coating is at the material of moulding plastics on the naked electric core surface of inhaling electrolyte and forms the membrane of moulding plastics, can design the thickness of injection mould as required. The tab can be fixed on the top surface of the cell body.
For example, the thickness ranges of the injection molding films coated on the front surface and the back surface of the cell body are 20um to 130um respectively; the thickness range of the injection molding film coated on the side surface of the battery cell body is 20-1000 um; the thickness ranges of the injection molding films coated on the top surface and the bottom surface of the battery cell body are respectively 50um-2000 um.
In some embodiments, can use transparent injection molding material, carry out the processing of moulding plastics to the naked electric core of inhaling the electrolyte to make the naked electric core surface of inhaling the electrolyte coated by transparent injection molding material.
The transparent injection molding material of cladding on naked electric core surface forms transparent membrane of moulding plastics. Use transparent injection molding film to seal the encapsulation to naked electric core for the finished product electric core that finally makes has transparent outward appearance effect, and the user can the direct observation to the inner structure of electric core.
In some embodiments, a variety of transparent molding materials are suitable, for example, a transparent molding material may include at least one of: polymethyl methacrylate, polystyrene, polycarbonate, styrene-methyl methacrylate copolymer, polypropylene, polyethylene terephthalate.
The above is only an example of the transparent injection molding material, and any suitable transparent injection molding material can be used.
Fig. 2 is a schematic diagram illustrating a method for manufacturing a battery cell according to an exemplary embodiment, where the method for manufacturing a battery cell shown in fig. 2 includes the following steps:
the first step, get rid of the moisture in the naked electric core, obtain anhydrous naked electric core.
And a second step of performing hot-pressing treatment on the anhydrous bare cell by using a hot-pressing die in the anhydrous equipment or the workshop so as to fully laminate the pole piece and the diaphragm in the anhydrous bare cell.
And the third step, immersing the bare cell after the hot-pressing treatment into electrolyte so as to enable the bare cell to suck the electrolyte.
The fourth step, in arranging the naked electric core of inhaling electrolyte in injection moulding equipment, use the material of moulding plastics to mould plastics the processing to naked electric core, encapsulate naked electric core through the injection moulding membrane that forms, make finished product electric core.
In this disclosed embodiment, through getting rid of the moisture in the naked electric core, carry out the hot pressing to the naked electric core after getting rid of moisture, with the naked electric core after the hot pressing soak in electrolyte, to the naked electric core of inhaling electrolyte the processing of moulding plastics to make the naked electric core surface of inhaling electrolyte by the material cladding of moulding plastics, obtain finished product electricity core. The quantity of the injection molding material can be controlled in the injection molding process, so that the formed injection molding film for packaging the naked electric core has a smaller size, and further the finished product electric core has a smaller size, and the structural design of the battery is facilitated.
The drawings are for illustrating the method of manufacturing the chip, and do not limit the thickness and size of each structure.
The embodiment of the disclosure also provides a battery cell, and the battery cell is manufactured according to the method provided by the embodiment of the disclosure.
The battery core has the characteristic of small occupied space of the packaging structure, and is favorable for the structural design of the battery. The diaphragm in the battery cell is completely stuck by the injection molding film, so that the problem of short circuit caused by inward contraction of the diaphragm can be avoided, and the safety performance of the battery cell is improved. When adopting transparent material of moulding plastics to mould plastics, the electric core of preparation has transparent encapsulation layer, has transparent outward appearance effect, and the user can direct observation to the inner structure of electric core.
The embodiment of the disclosure further provides a battery, which includes the battery core provided by the above embodiment of the disclosure.
Based on the advantages of the battery cell, the battery manufactured by the battery cell also has the advantages.
Specifically, the battery cell provided by the embodiment of the disclosure has the advantage of small occupied size of the packaging structure, so that the battery manufactured by the battery cell has the advantages of large design space, capability of carrying out various structural designs and the like; the battery cell provided by the embodiment of the disclosure has the advantage of high safety performance, and therefore, the battery manufactured by the battery cell has the advantages of high safety performance, long service life and the like.
The embodiment of the disclosure also provides an electronic device which comprises the battery provided by the embodiment of the disclosure.
The advantages of a battery based electronic device comprising the battery also include advantages.
There are many electronic devices, such as mobile phones, tablet computers, wearable devices, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. A method for manufacturing a battery cell, the method comprising:
removing moisture in the bare cell;
carrying out hot pressing treatment on the bare cell after the moisture is removed;
immersing the bare cell subjected to the hot pressing treatment into electrolyte;
and carrying out injection molding treatment on the naked electric core sucked with the electrolyte so as to enable the surface of the naked electric core sucked with the electrolyte to be coated with an injection molding material, thereby obtaining a finished product electric core.
2. The manufacturing method of claim 1, wherein the bare cell comprises a cell body and a tab, and the tab is connected with the cell body; the suction the naked electric core of electrolyte carries out the processing of moulding plastics, include:
and performing injection molding treatment on the battery cell body which absorbs the electrolyte and part of the lugs close to the battery cell body so as to coat the surface of the battery cell body and the surface of the part of the lugs by the injection molding material.
3. The manufacturing method according to claim 2, wherein the tab is connected to the top surface of the cell body; the injection molding material coated on the surface of the battery cell body and the surface of the partial tab forms an injection molding film; wherein,
the thickness ranges of the injection molding films coated on the front surface and the back surface of the battery cell body are respectively 20-130 um;
the thickness range of the injection molding film coated on the side surface of the battery cell body is 20-1000 um;
the cladding is in the thickness scope of the injection molding membrane of the top surface of electricity core body and bottom surface is 50um-2000um respectively.
4. The manufacturing method according to claim 1, wherein the injection molding treatment is performed on the bare cell into which the electrolyte is sucked, and the method comprises the following steps:
and using a transparent injection molding material to inject the naked electric core of the electrolyte so as to enable the naked electric core surface of the electrolyte to be sucked to be coated by the transparent injection molding material.
5. The method of manufacturing of claim 4, wherein the transparent injection molding material comprises at least one of: polymethyl methacrylate, polystyrene, polycarbonate, styrene-methyl methacrylate copolymer, polypropylene, polyethylene terephthalate.
6. The manufacturing method of claim 1, wherein the removing moisture from the bare cell comprises:
and vacuum baking the naked electric core to ensure that the moisture content in the vacuum baked naked electric core is less than or equal to 150 ppm.
7. The manufacturing method according to claim 1, wherein the bare cell subjected to moisture removal is subjected to hot-pressing treatment, and the hot-pressing treatment comprises the following steps:
carrying out hot-pressing treatment on the bare cell subjected to moisture removal in an anhydrous environment, wherein the conditions of the hot-pressing treatment comprise: the hot pressing temperature is 70-100 ℃, and the hot pressing pressure is 0.6-2.0 Mpa.
8. The method according to claim 1, wherein the step of immersing the hot pressed bare cell in an electrolyte comprises:
and immersing the bare cell subjected to the hot pressing treatment into electrolyte for 12-30 h at 15-45 ℃.
9. A cell, characterized in that it is manufactured according to the method of any of claims 1 to 8.
10. A battery comprising the cell of claim 9.
11. An electronic device characterized by comprising the battery of claim 10.
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| CN202010797685.2A CN114079125A (en) | 2020-08-10 | 2020-08-10 | Battery cell, manufacturing method thereof, battery and electronic equipment |
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| CN202010797685.2A CN114079125A (en) | 2020-08-10 | 2020-08-10 | Battery cell, manufacturing method thereof, battery and electronic equipment |
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