CN111933854A - Battery applicable to alpine regions and preparation method thereof - Google Patents
Battery applicable to alpine regions and preparation method thereof Download PDFInfo
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- CN111933854A CN111933854A CN202010833227.XA CN202010833227A CN111933854A CN 111933854 A CN111933854 A CN 111933854A CN 202010833227 A CN202010833227 A CN 202010833227A CN 111933854 A CN111933854 A CN 111933854A
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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
- H01M10/05—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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
Abstract
The invention relates to a battery applicable to alpine regions and a preparation method thereof, wherein the battery comprises a battery core, a heating membrane assembly, a soft box and a soft cover; the heating film assembly comprises an electric heating film and an electrode guide sheet; the electrothermal film comprises a heating body, an upper protective layer, a lower protective layer and an electrode band; the heating element is a flexible carbon fiber film prepared by a non-woven fabric process; the upper protective layer and the lower protective layer are both prepared from non-woven fabrics; the upper protective layer, the heating body and the lower protective layer are sequentially stacked; the electrode lead sheet is connected with the electrode belt. The battery of the invention has wide use environment temperature: the normal charge and discharge work can be carried out in the temperature range of minus 60 ℃ to plus 60 ℃; moreover, the battery has wide application range and strong adaptability: the device can be used independently, can also be used in a group after being connected in series and in parallel, and can be applied to scientific investigation in northern cold regions, high-altitude regions and polar regions.
Description
Technical Field
The invention belongs to the field of lithium batteries, and particularly relates to a battery applicable to alpine regions and a preparation method thereof.
Background
With the development of green energy, on one hand, more and more pure electric vehicles with new energy are put into operation to solve the problems of fossil energy and environmental pollution which are in shortage day by day. On the other hand, in northern cold areas, people often see the situation in winter, and the electric vehicle cannot normally work due to too low weather temperature, so that frequent 'groveling' news appears.
At present, the lowest service temperature of a commercial conventional lithium ion battery can only reach minus 20 ℃ generally, and a considerable number of application environments need to be lower than the working temperature; however, the discharge capacity of the lithium battery is seriously reduced at low temperature, for example, the discharge capacity of the lithium battery can only reach 10 to 30 percent of the discharge capacity at room temperature under the environment of-40 ℃, the discharge capacity of the special low-temperature battery can reach more than 60 percent at the temperature of-40 ℃, but the special low-temperature battery can still not be normally used under the environment of ultralow temperature of-60 ℃, and the cycle life of the special low-temperature battery is only half of that of the conventional battery.
Through many years of efforts, people can prepare batteries capable of being discharged and used in a low-temperature environment, but the charging problem in the low-temperature environment still cannot be solved.
The reason for this is that, in a low-temperature environment, the electrical conductivity of the positive electrode and the negative electrode is reduced, the viscosity of the electrolyte is rapidly increased, the migration of lithium ions between the electrodes is very difficult, the thermodynamic properties of the carbon negative electrode are deteriorated, the lithium ion intercalation/deintercalation capability is weakened, lithium ions are deposited on the surface in the form of metallic lithium, and lithium dendrites are formed over time, thereby causing the risk of short circuit between the positive electrode and the negative electrode.
Therefore, when the electric vehicle is charged at low temperature, on one hand, the electric vehicle cannot be charged, and on the other hand, the combustion safety accident is easy to happen.
In conclusion, how to improve the low-temperature performance of the lithium ion battery of the pure electric vehicle at minus 40 ℃ and meet the lower low-temperature performance requirement of minus 60 ℃ in the fields of national defense and scientific research becomes a difficult problem to be solved urgently in the field of the lithium ion battery. Further, since the above-mentioned low temperature resistant battery is often used at room temperature or at a slightly higher temperature, the battery is required to have low temperature resistance and to be normally used at room temperature or at a slightly higher temperature.
Disclosure of Invention
The invention provides a battery applicable to alpine regions and a preparation method thereof, wherein the battery comprises a battery core, a heating membrane assembly, a soft box and a soft cover;
the heating film assembly comprises an electric heating film and an electrode guide sheet;
the electrothermal film comprises a heating body, an upper protective layer, a lower protective layer and an electrode band;
the heating element is a flexible carbon fiber film prepared by a non-woven fabric process;
the upper protective layer and the lower protective layer are both prepared from non-woven fabrics;
the electrode belts comprise a positive electrode belt and a negative electrode belt, and the positive electrode belt and the negative electrode belt are both arranged on the surface of the flexible carbon fiber film;
the upper protective layer, the heating body and the lower protective layer are sequentially stacked;
the electrode lead sheet is connected with the electrode belt;
the electric heating film is attached to one surface of the battery cell; the battery core and the heating film assembly are arranged in the soft box and are combined with the soft cover to be prepared into a whole through thermal compounding.
The electric heating film adopts the carbon fiber film prepared by the non-woven fabric process as a heating body, the working voltage of the element is the safe direct-current voltage lower than 30V, the battery or an external power supply is adopted for supplying power, the highest electric heating temperature is adjustable and controllable, the stable heating of the battery core under the low-temperature condition can be realized, and then the non-woven fabric is selected as the protective layer of the heating body, so that the quick heating of the battery core can be realized, the heat dissipation of the battery under the high-temperature condition is facilitated, meanwhile, the insulating and isolating effects are also realized, and the interference on a subsequent battery sampling circuit. In addition, in order to ensure the normal use and heat dissipation of the battery under the high-temperature condition, only one surface of the battery core is attached with a battery core heating body. Through the operation, the normal use of the battery under the temperature condition of minus 60 ℃ to 60 ℃ can be finally realized.
The positive electrode strip and the negative electrode strip are made of the same material, have no polarity requirement when being connected with an external circuit, and can be used interchangeably.
In a preferred embodiment, the nonwoven fabric of the present invention is made of one of polypropylene (PP), polyethylene terephthalate (PET), and Polyethylene (PE).
Preferably, the heating element, the upper protective layer, the electrode belt and the lower protective layer are bonded together through conductive paste, and the conductive paste is prepared by mixing an adhesive, a conductive agent, a thickening agent and a solvent;
further preferably, the mass ratio of the adhesive to the conductive agent to the thickening agent is 2.5-4.5: 2.5-5.5: 1; the mass ratio of the total mass of the binder, the conductive agent and the thickener to the solvent is 1: 0.05 to 0.15.
The adhesive can solve the problems that the upper and lower protective layers and the heating body are hardened after bonding and are easy to fall off and peel after heating if conventional glue is adopted for bonding, has the advantages of firm bonding and no change of the flexibility of the material, does not denature at the low temperature of minus 60 ℃, and can realize normal use at the ultralow temperature.
Preferably, the adhesive is one or more of polyvinylidene fluoride, polyimide, polyacrylonitrile-tetra-methyl acrylate, polyacrylonitrile, polypropylene esters and styrene butadiene rubber; preferably vinylidene fluoride and/or styrene butadiene rubber.
And/or the conductive agent is one or more of carbon black, acetylene black, carbon fiber, graphene, carbon nanotube, conductive carbon black and conductive graphite, and is preferably carbon black and/or carbon nanotube;
and/or the thickening agent is sodium carboxymethyl cellulose;
and/or the solvent is one or more of deionized water, distilled water, acetone and N-methyl pyrrolidone.
Preferably, the thickness of the carbon fiber membrane is 0.5 mm-2 mm;
preferably, the thickness of the non-woven fabric is 0.3-1 mm.
Preferably, the battery cell is a solid polymer low-temperature battery cell with the discharge capacity of more than 85% under the environment of-40 ℃. On the one hand, the problem of low-temperature discharge in the range of 0 to minus 40 ℃ is a mature technology, and on the basis, the invention can solve the problem of low-temperature discharge in the range of minus 40 to minus 60 ℃ and the problem of charging at the temperature of 0 to minus 60 ℃ through the electric heating film, which can be twice the result of half the effort; on the other hand, the solid polymer battery cell can be in any shape and size, the solid polymer battery cell can be tightly attached to the electrothermal film, the consistency of the surface temperature of the battery cell is good, the capacity of the monomer battery cell of the polymer system can reach 3000Ah at most, and the application scene of the invention can be expanded.
Preferably, the battery core positive electrode material is any one of lithium cobaltate, a ternary material and modified lithium manganate, and the electrolyte is a low-temperature system electrolyte;
as a preferred embodiment, the ternary material is NCM.
Preferably, a plurality of vent holes are distributed on the surface of the flexible carbon fiber electrothermal film. The invention discovers that the problems of poor air permeability and poor heat radiation of the carbon fiber film due to the fact that the carbon fiber film is covered by the upper protective layer and the lower protective layer and the conductive slurry, and the vent holes are formed in the surface of the electrothermal film, so that the heat radiation area can be increased through the inner wall of the vent holes, the electrothermal conversion efficiency and the radiation effect of the electrothermal film are effectively improved, and the electrothermal film is more beneficial to being used in an ultralow temperature environment.
More preferably, the diameter of the vent hole is 1-3 mm, and the distance between adjacent holes is 5-15 mm.
Preferably, the soft box and the soft cover are both made of aluminum-plastic composite films. On one hand, the aluminum-plastic composite film has good heat insulation performance, is easy to seal and press, and can form a good heat insulation layer on the surfaces of the electric core and the electric heating film.
Preferably, the thickness of the aluminum-plastic composite film is 100-150 μm.
The batteries of the invention can be used in series and parallel connection as a group.
The flexible carbon fiber membrane prepared by the non-woven fabric process is commonly called non-woven fabric made of carbon fibers.
The invention also provides a preparation method of the battery, which comprises the following steps:
1) attaching the cell heating film to one surface of the cell to form a semi-finished product of the battery;
2) and (3) putting the semi-finished battery into the soft box, and fusing the soft box and the soft cover together through a thermal compounding process to obtain a finished battery.
The specific operation mode comprises the following steps:
1) welding electrode lead pieces on the electrode strips of the heating film to form a heating film assembly;
2) pasting double-sided adhesive tapes at the four corners of one surface of the heating film, and combining the double-sided adhesive tapes with one surface of the battery core to form a battery semi-finished product;
3) punching the aluminum-plastic composite film into a flanging soft box with the length, width and outline dimension 2-3 mm larger than the semi-finished product of the battery and the height dimension 0.3-1 mm larger by a stretching process, wherein the edge sealing width is 5-15 mm, and punching out a battery core lug avoiding position to obtain a finished product soft box;
4) and (3) putting the semi-finished product of the battery into a soft box, closing the soft cover, and fusing the sealing edges together by adopting a thermal compounding process to obtain the finished product of the battery.
Preferably, the preparation of the electrothermal film comprises the following steps:
1) double-sided coating of the heating element and the electrode strip: cleaning the surfaces of the heating element and the electrode belt by using a plasma cleaning machine, respectively coating the slurry on the two surfaces of the heating element and the electrode belt, and drying;
2) coating one side of the protective layer: cleaning the surface of the protective layer by using a plasma cleaning machine, uniformly coating the slurry on one surface of the upper protective layer and the lower protective layer, and drying;
3) and (3) laminating the electrode belt and the heating body: pressing the electrode belt on one side of the heating body through a thermal compounding process of a roller press;
4) and (3) laminating of the protective layer: and laminating the upper protective layer and the lower protective layer on the surface of the heating body or the electrode belt through a thermal compounding process of a roller press.
The invention has the following beneficial effects:
1) the battery of the invention has wide use environment temperature: the normal charge and discharge work can be carried out in the temperature range of minus 60 ℃ to plus 60 ℃;
2) the battery of the invention has wide application range and strong adaptability: the device can be used independently, can also be used in a group after being connected in series and in parallel, and can be applied to scientific investigation in northern cold regions, high-altitude regions and polar regions.
Drawings
FIG. 1 is a schematic diagram of the battery configuration on the left and an expanded diagram of the battery on the right;
FIG. 2 is a schematic view of the electric heating film;
FIG. 3 is a schematic cross-sectional view of an electrothermal film;
FIG. 4 is a schematic structural view of an electrothermal film assembly;
FIG. 5 is a schematic view of a semi-finished cell structure;
FIG. 6 is a schematic view of the structure of the soft case;
fig. 7 is a schematic diagram of a battery cell structure.
The figure is as follows: 100-electric heating film, 100A-electric heating film assembly, 101-lower protective layer, 102-heating body, 103-electrode band, 104-upper protective layer, 200-electric core, 300-electrode lead sheet, 400-soft box, 400A-electric core lug avoiding position, 500-soft cover, 600-battery 700-adapter plate and 700A-welding plate.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The present embodiment relates to a battery 600 (the specific structure is shown in fig. 1 to 7) that can be used in alpine regions, and the battery includes a battery cell 200, an electrothermal film 100, a soft case 400, and a soft cover 500;
the electrothermal film 100 is attached to one surface of the battery cell 200; the battery cell 200 and the electrothermal film 100 are installed in the soft box 400;
the electrothermal film comprises a heating body 102, an upper protective layer 104 and a lower protective layer 101, wherein the heating body 102 is a carbon fiber film prepared by a non-woven fabric process, and the upper protective layer 104 and the lower protective layer 101 are both non-woven fabrics;
the upper protective layer 104 and the lower protective layer 101 are provided on the upper and lower surfaces of the heating element 102;
the battery cell 200 is a solid polymer low-temperature battery cell with a discharge capacity of more than 85% at-40 ℃.
The positive electrode material of the battery cell 200 is any one of lithium cobaltate, a ternary material (NCM) and modified lithium manganate, and the electrolyte is a low-temperature system electrolyte; the cell 200 is prepared by a polymer lamination process.
The thickness of the carbon fiber film is 0.5-2 mm; the thickness of the non-woven fabric is 0.3-1 mm.
An electrode strip 103 is arranged between the heating body 102 and the protective layer, the electrode strip 103 is connected with the battery core 200 or an external battery through an electrode lead piece 300, and the electrode lead piece 300 is made of a conductive metal sheet and a rubber sheet through hot pressing.
The soft box 400 is made of an aluminum-plastic composite film; the thickness of the aluminum-plastic composite film is 100-150 mu m.
The soft cover 500 is made of an aluminum-plastic composite film.
The electrode lead piece 300 is used for connecting an external power supply or supplying power to the battery 600, and a circuit required for heating the battery 600 is formed by connecting the electrode lead pieces 300 arranged on the two sides of the electric heating film;
2. as shown in fig. 5, when the battery 600 itself is used as a heating power supply, the positive electrode and the negative electrode of the battery cell 200 can be connected to the control circuit by a wire, and then the control circuit is connected to the electrode tabs 300 disposed on the two sides of the electric heating film by a wire, so as to form a circuit required for heating the battery cell 200, thereby implementing a heating function.
3. As shown in fig. 7, when the batteries 600 need to be connected in series and in parallel for use in a group, after the batteries are stacked according to the series and parallel requirements, the electrode tabs 300 pass through the adapter plate 700 and are welded on the corresponding bonding pads 700a by laser; when the battery pack is powered by an external power supply, the positive and negative electrodes of the power supply are respectively welded with positive and negative electrode pads arranged on the adapter plate 700, so as to form a circuit required for heating the battery cell 200. The power supply is turned on, and the heating function of all the battery cells 200 can be realized.
The battery described in this example was prepared as follows:
1) stripping off a small upper protective layer 104 above the electrode strip 103, and welding an electrode lead piece 300 on the electrode strip 103 of the electrothermal film 100 by using a resistance welding or laser welding process to form an electrothermal film assembly 100A;
2) attaching a small piece of double-sided adhesive tape at the four corners of one surface of the electric heating film 100, and combining the small piece of double-sided adhesive tape with one surface of the battery cell 200 to form a semi-finished battery product;
3) punching the aluminum-plastic composite film into a flanging soft box with the length, width and outline dimension 2-3 mm larger than the semi-finished product of the battery and the height dimension 0.3-1 mm larger by a stretching process, wherein the edge sealing width is 5-15 mm, and then punching a lug avoiding position 400a of a battery cell 200 to obtain a finished product soft box;
4) filling the semi-finished product of the battery into a soft box 400, closing a soft cover 500, and fusing the sealing edges together by adopting a thermal compounding process to obtain a finished product of the battery;
5) when the batteries need to be connected in series and in parallel for use in groups, the electrode tabs 300 are welded to the corresponding welding pads 700a by laser welding, soldering tin or resistance welding after the batteries 600 are stacked according to the series and parallel requirements.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The battery applicable to the alpine region is characterized by comprising a battery core, a heating membrane component, a soft box and a soft cover;
the heating film assembly comprises an electric heating film and an electrode guide sheet;
the electrothermal film comprises a heating body, an upper protective layer, a lower protective layer and an electrode band;
the heating element is a flexible carbon fiber film prepared by a non-woven fabric process;
the upper protective layer and the lower protective layer are both prepared from non-woven fabrics;
the electrode belts comprise a positive electrode belt and a negative electrode belt, and the positive electrode belt and the negative electrode belt are both arranged on the surface of the flexible carbon fiber film;
the upper protective layer, the heating body and the lower protective layer are sequentially stacked;
the electrode lead sheet is connected with the electrode belt;
the electric heating film is attached to one surface of the battery cell, and the battery cell and the heating film assembly are installed in the soft box and combined with the soft cover to be thermally compounded into a whole.
2. The battery applicable to alpine regions according to claim 1, wherein the heating body, the upper protective layer, the electrode belt, and the lower protective layer are bonded together by a conductive paste, and the conductive paste is prepared by mixing a binder, a conductive agent, a thickener, and a solvent;
preferably, the mass ratio of the adhesive to the conductive agent to the thickening agent is 2.5-4.5: 2.5-5.5: 1; the mass ratio of the total mass of the binder, the conductive agent and the thickener to the solvent is 1: 0.05 to 0.15.
3. The battery applicable to the alpine regions according to claim 2, wherein the binder is one or more of polyvinylidene fluoride, polyimide, polyacrylonitrile-tetra-methyl acrylate, polyacrylonitrile, polypropylene esters and styrene butadiene rubber; preferably vinylidene fluoride and/or styrene butadiene rubber;
and/or the conductive agent is one or more of carbon black, acetylene black, carbon fiber, graphene, carbon nanotube, conductive carbon black and conductive graphite, and is preferably carbon black and/or carbon nanotube;
and/or the thickening agent is sodium carboxymethyl cellulose;
and/or the solvent is one or more of deionized water, distilled water, acetone and N-methyl pyrrolidone.
4. The battery applicable to alpine regions according to claim 1, wherein the thickness of the carbon fiber film is 0.5mm to 2 mm;
and/or the thickness of the non-woven fabric is 0.3-1 mm.
5. The battery of claim 1, wherein the cell is a solid polymer low-temperature cell with a discharge capacity of 85% or more at-40 ℃.
6. The battery of claim 1 or 5, wherein the cell positive electrode material is any one of lithium cobaltate, a ternary material or modified lithium manganate, and the electrolyte is a low-temperature system electrolyte.
7. The battery applicable to alpine regions according to claim 1, wherein a plurality of vent holes are distributed on the surface of the flexible carbon fiber electrothermal film; preferably, the diameter of the vent hole is 1-3 mm, and the distance between adjacent holes is 5-15 mm.
8. The method for preparing the battery applicable to the alpine region according to any one of claims 1 to 7, comprising the following steps:
1) attaching the cell heating film to one surface of the cell to form a semi-finished product of the battery;
2) and (3) putting the semi-finished battery into the soft box, and fusing the soft box and the soft cover together through a thermal compounding process to obtain a finished battery.
9. The method for preparing a battery applicable to alpine regions according to claim 8, comprising the steps of:
1) welding electrode lead pieces on the electrode strips of the heating film to form a heating film assembly;
2) pasting double-sided adhesive tapes at the four corners of one surface of the heating film, and combining the double-sided adhesive tapes with one surface of the battery core to form a battery semi-finished product;
3) punching the aluminum-plastic composite film into a flanging soft box with the length, width and outline dimension 2-3 mm larger than the semi-finished product of the battery and the height dimension 0.3-1 mm larger by a stretching process, wherein the edge sealing width is 5-15 mm, and punching out a battery core lug avoiding position to obtain a finished product soft box;
4) and (3) putting the semi-finished product of the battery into a soft box, closing the soft cover, and fusing the sealing edges together by adopting a thermal compounding process to obtain the finished product of the battery.
10. The method for preparing a battery as claimed in claim 9, wherein the preparation of the electrothermal film comprises the steps of:
1) double-sided coating of the heating element and the electrode strip: cleaning the surfaces of the heating element and the electrode belt by using a plasma cleaning machine, respectively coating the slurry on the two surfaces of the heating element and the electrode belt, and drying;
2) coating one side of the protective layer: cleaning the surface of the protective layer by using a plasma cleaning machine, uniformly coating the slurry on one surface of the upper protective layer and the lower protective layer, and drying;
3) and (3) laminating the electrode belt and the heating body: pressing the electrode belt on one side of the heating body through a thermal compounding process of a roller press;
4) and (3) laminating of the protective layer: and laminating the upper protective layer and the lower protective layer on the surface of the heating body or the electrode belt through a thermal compounding process of a roller press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010833227.XA CN111933854A (en) | 2020-08-18 | 2020-08-18 | Battery applicable to alpine regions and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010833227.XA CN111933854A (en) | 2020-08-18 | 2020-08-18 | Battery applicable to alpine regions and preparation method thereof |
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| CN111933854A true CN111933854A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010833227.XA Withdrawn CN111933854A (en) | 2020-08-18 | 2020-08-18 | Battery applicable to alpine regions and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909323A (en) * | 2021-01-26 | 2021-06-04 | 领航国创新能源电池技术研究院(北京)有限公司 | Battery pack capable of working in high-cold and extremely hot environments |
| CN116330777A (en) * | 2023-03-28 | 2023-06-27 | 广东中宇恒通电热科技有限公司 | Heating film with high-strength insulating material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170338533A1 (en) * | 2016-05-23 | 2017-11-23 | Johnny Tu Chungli | Battery Jacket |
| CN109950664A (en) * | 2019-03-29 | 2019-06-28 | 杜武浩 | A kind of heating sheet and the new energy battery pack equipped with the heating sheet |
| CN111418108A (en) * | 2017-09-14 | 2020-07-14 | 米巴电动汽车有限公司 | Storage battery |
-
2020
- 2020-08-18 CN CN202010833227.XA patent/CN111933854A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170338533A1 (en) * | 2016-05-23 | 2017-11-23 | Johnny Tu Chungli | Battery Jacket |
| CN111418108A (en) * | 2017-09-14 | 2020-07-14 | 米巴电动汽车有限公司 | Storage battery |
| CN109950664A (en) * | 2019-03-29 | 2019-06-28 | 杜武浩 | A kind of heating sheet and the new energy battery pack equipped with the heating sheet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112909323A (en) * | 2021-01-26 | 2021-06-04 | 领航国创新能源电池技术研究院(北京)有限公司 | Battery pack capable of working in high-cold and extremely hot environments |
| CN116330777A (en) * | 2023-03-28 | 2023-06-27 | 广东中宇恒通电热科技有限公司 | Heating film with high-strength insulating material |
| CN116330777B (en) * | 2023-03-28 | 2023-09-15 | 广东中宇恒通电热科技有限公司 | Heating film with high-strength insulating material |
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Application publication date: 20201113 |