CN114361569A - Cylindrical battery, preparation method thereof and vehicle - Google Patents
Cylindrical battery, preparation method thereof and vehicle Download PDFInfo
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- CN114361569A CN114361569A CN202210013893.8A CN202210013893A CN114361569A CN 114361569 A CN114361569 A CN 114361569A CN 202210013893 A CN202210013893 A CN 202210013893A CN 114361569 A CN114361569 A CN 114361569A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 98
- 229920005989 resin Polymers 0.000 claims abstract description 93
- 239000011347 resin Substances 0.000 claims abstract description 93
- 239000000203 mixture Substances 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000006258 conductive agent Substances 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000002041 carbon nanotube Substances 0.000 claims description 6
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 6
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 5
- 229920000178 Acrylic resin Polymers 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 239000004643 cyanate ester Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229920001567 vinyl ester resin Polymers 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- 239000004645 polyester resin Substances 0.000 claims description 4
- 229920001225 polyester resin Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 238000003466 welding Methods 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 238000005520 cutting process Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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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
- 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
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a cylindrical battery, a preparation method thereof and a vehicle, wherein the preparation method comprises the steps of mixing thermosetting resin and a conductive agent to obtain a thermosetting resin mixture with conductivity; coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the full lug coated with the thermosetting resin mixture and the current collecting disc to obtain the cylindrical battery cell adhered with the current collecting disc; and heating and curing the adhesion part of the full lug and the current collecting disc, and assembling a shell to obtain the cylindrical battery. The thermosetting resin mixture has good plasticity and cohesiveness, can realize the stable connection between the full tab and the current collecting disc, and ensures that the prepared cylindrical battery has good thermal stability, corrosion resistance and excellent rate capability.
Description
Technical Field
The invention relates to the field of batteries, in particular to a cylindrical battery, a preparation method of the cylindrical battery and a vehicle.
Background
The lithium ion battery has the advantages of large specific energy, high working voltage, long cycle life, environmental protection and the like, and is widely applied to the fields of new energy automobiles, energy storage and the like. With the development of the market, the power lithium ion battery gradually develops towards high energy density, high rate performance and high safety performance.
The full-lug cylindrical battery is a novel cylindrical battery, and can not have an independent lug and be connected with a current collector, and can be used as the lug through the tail part of the current collector, and is connected with the tail part of the current collector used as the lug through a current collecting disc structure, so that the connection area of the lug conduction area and the connection part can be increased, and the lug conduction distance is shortened, thereby greatly reducing the internal resistance of the battery, reducing the heat productivity of the battery, prolonging the service life of the battery, improving the charging and discharging peak power, and greatly improving the performance of the battery.
However, in the production process of the cylindrical battery with the full tabs, the connection between the full tabs and the current collecting disc can be processed by adopting a tab rubbing and welding mode, so that the end surfaces of the full tabs are smooth, and the cylindrical battery with the full tabs can be well connected with the current collecting disc. However, in the process of flattening the tab, metal chips are generally easy to fall into the battery cell, so that a serious potential safety hazard may be caused. Meanwhile, in the process of kneading and flattening the tabs, the situation of insulation film puncture is easy to occur, which causes short circuit inside the battery cell and causes safety problems. In addition, the full lug and the current collecting disc are welded by a laser, so that on one hand, the cost is high, and on the other hand, the problems of welding slag, explosion points, breakdown and the like are easy to occur, and the welding efficiency is influenced. If laser and hardware are adopted to cut and cut the full lug, metal foreign matters are easily introduced, and the lug is easily extruded and deformed to cause the structural damage of the battery cell, so that the structural stability and the safety of the battery are influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a cylindrical battery, a preparation method of the cylindrical battery and a vehicle, which can ensure that a lug and a current collecting disc are connected more safely, thereby improving the structural stability of the full-lug cylindrical battery.
In order to solve the above problems, the present invention discloses a method for manufacturing a cylindrical battery, comprising:
mixing thermosetting resin and a conductive agent to obtain a thermosetting resin mixture with conductivity;
coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the full lug coated with the thermosetting resin mixture and the current collecting disc to obtain the cylindrical battery cell adhered with the current collecting disc;
and heating and curing the adhesion part of the full lug and the current collecting disc, and assembling a shell to obtain the cylindrical battery.
Optionally, the thermosetting resin includes at least one of epoxy resin, acrylic resin, modified polyurethane, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide, and cyanate ester.
Optionally, the conductive agent includes at least one of copper powder, aluminum powder, silver powder, nickel powder, conductive carbon black, carbon nanotube, graphene, conductive graphite powder, and conductive carbon fiber powder.
Optionally, the mass ratio of the thermosetting resin to the conductive agent is (30-85)/(70-15).
Optionally, in the step of pressure adhesion of the full tab coated with the thermosetting resin mixture and the current collecting disc, the pressure of the pressure adhesion is 2-15 MPa, and the retention time is 2-10 minutes.
Optionally, in the step of heating and curing the adhesion part of the full tab and the current collecting disc, the heating and curing temperature is 60-110 ℃, and the heating time is 10-180 minutes.
Optionally, an insulating layer is arranged at the edge of the full tab of the cylindrical battery;
the step of coating the thermosetting resin mixture on the full tab of the cylindrical battery cell includes:
and coating the thermosetting resin mixture on the full lug in the insulating layer of the cylindrical battery cell.
Optionally, the step of heating and curing the adhesion between the full tab and the current collecting disc, and assembling a housing to obtain a cylindrical battery includes:
heating and curing the adhesion part of the full lug and the current collecting disc;
and the cylindrical battery cell is wrapped by the shell cover plate which is arranged on the shell main body and matched with the shell main body, so that the cylindrical battery is obtained.
The invention also discloses a cylindrical battery, and the cylindrical battery is prepared by the preparation method.
The invention further discloses a vehicle which comprises the cylindrical battery.
Compared with the prior art, the invention has the following advantages:
(1) the invention adopts the mixture of the thermosetting resin and the conductive agent to carry out the full-tab connection on the cylindrical battery, and the preparation method has the advantages of simple process flow, convenient operation, excellent performance and high product value, and can be widely used for the production and the preparation of the cylindrical battery.
(2) The invention effectively avoids byproducts such as metal chips, burrs, welding slag and the like generated in the laser welding process of the full-lug, and effectively improves the safety and the production efficiency of the cylindrical battery.
(3) The invention effectively avoids the structural damage caused by metal foreign matters, lug extrusion deformation and the like introduced by laser/hardware cutting and clipping, and improves the structural stability, conductivity and safety performance of the full-lug cylindrical battery.
(4) The cylindrical battery manufactured according to the present invention may have excellent electrochemical properties. According to the invention, the thermosetting resin mixture is used as a raw material, and the stable connection of the tab and the current collecting disc is realized by utilizing the good conductivity, plasticity and cohesiveness of the thermosetting resin mixture, so that the prepared cylindrical battery has good thermal stability, corrosion resistance and excellent rate capability.
Drawings
FIG. 1 is a schematic diagram of a cylindrical battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a full tab and current collecting disc in a cylindrical battery according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a full tab and current collecting disc in a cylindrical battery according to an embodiment of the present invention.
Description of reference numerals:
1-a winding core; 2-a housing body; 3-a housing cover plate; 4-a collector tray; 5-a thermosetting resin mixture; 11-positive ear terminal; 12-negative ear terminal.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention discloses a preparation method of a cylindrical battery, which comprises the following steps:
step 101, mixing thermosetting resin and a conductive agent to obtain a thermosetting resin mixture with conductivity;
step 102, coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the full lug coated with the thermosetting resin mixture and the current collecting disc to obtain the cylindrical battery cell adhered with the current collecting disc;
and 103, heating and curing the adhesion part of the full tab and the current collecting disc, and assembling a shell to obtain the cylindrical battery.
Particularly, in order to avoid the damage of the cylindrical battery with the full lug in the production process, the full lug and the current collecting disc can be connected in a bonding mode, so that the structural damage caused by metal foreign matters, lug extrusion deformation and the like introduced by laser/hardware cutting and cutting can be avoided, and the structural stability, the conductivity and the safety performance of the cylindrical battery with the full lug are improved. Meanwhile, byproducts such as metal chips, burrs, welding slag and the like generated in the welding process can be avoided. The safety and the production efficiency of the cylindrical battery can be effectively improved.
Meanwhile, a conductive agent can be added into the thermosetting resin for bonding the full-lug and the current collecting disc, so that good conductive performance can be kept between the full-lug and the current collecting disc. The thermosetting resin mixture has good plasticity and cohesiveness, can realize the stable connection between the full tab and the current collecting disc, and ensures that the prepared cylindrical battery has good thermal stability, corrosion resistance and excellent rate capability.
The method has the advantages of simple process flow, convenient operation, excellent performance and high product value, and can be widely used for producing and preparing the cylindrical battery.
In one embodiment of the present invention, the thermosetting resin includes at least one of epoxy resin, acrylic resin, modified polyurethane, polyester resin, vinyl ester, bismaleimide, thermosetting polyimide, and cyanate ester.
By adopting the thermosetting resin to connect the full lug and the current collecting disc, the thermosetting resin can be cured in a heating mode in the production process of the cylindrical battery more simply, so that the stable connection between the full lug and the current collecting disc is realized.
In an embodiment of the present invention, the conductive agent includes at least one of copper powder, aluminum powder, silver powder, nickel powder, conductive carbon black, carbon nanotube, graphene, conductive graphite powder, and conductive carbon fiber powder.
In one embodiment of the present invention, the mass ratio between the thermosetting resin and the conductive agent is (30-85)/(70-15). For example, the mass ratio between the thermosetting resin and the conductive agent may be 30/70, 40/60, 50/50, 60/40, 70/30, 85/15, etc., which is not limited by the present invention.
By adding the conductive agent into the thermosetting resin and setting a proper mass ratio, the full-lug current collecting disc can keep better conductive performance and has better stability.
In one embodiment of the invention, in the step of pressure-bonding the full tab coated with the thermosetting resin mixture to the current collecting disc, the pressure of the pressure-bonding is 2-15 MPa, and the holding time is 2-10 minutes.
The pressure is kept for 2-10 minutes under the pressure of 2-15 MPa, so that the thermosetting resin mixture can be ensured to fully contact the full lug and the current collecting disc, the thermosetting resin can be stably connected with the full lug and the current collecting disc, and the electric core of the cylindrical battery cannot be damaged due to overlarge pressure.
In one embodiment of the invention, in the step of heating and curing the adhesion part of the full tab and the current collecting disc, the heating and curing temperature is 60-110 ℃, and the heating time is 10-180 minutes.
The thermosetting resin can be cured well by heating for 10-180 minutes at 60-110 ℃, and stable connection between the full tab and the current collecting disc is realized.
In one embodiment of the invention, the full tab edge of the cylindrical battery is provided with an insulating layer;
the step of coating the thermosetting resin mixture on the full tab of the cylindrical battery cell includes:
and coating the thermosetting resin mixture on the full lug in the insulating layer of the cylindrical battery cell.
Specifically, in order to protect the cell of the cylindrical battery, an insulating layer may be generally provided at the edge of the cylindrical battery cell. The insulating layer may be composed of one or more layers of insulating material. In order to avoid the failure of the insulating layer, when thermosetting resin is coated, the thermosetting resin mixture can be coated on the full tab inside the insulating layer of the cylindrical battery cell, so that the problem that the thermosetting resin is coated on the insulating layer to cause the failure of the insulating layer is avoided.
According to the preparation method of the cylindrical battery provided by the embodiment of the invention, the full lug and the current collecting disc are connected in a bonding mode, so that structural damage caused by metal foreign matters, lug extrusion deformation and the like introduced by laser/hardware cutting and clipping can be avoided, and the structural stability, the conductivity and the safety performance of the full lug cylindrical battery are improved. Meanwhile, byproducts such as metal chips, burrs, welding slag and the like generated in the welding process can be avoided. The safety and the production efficiency of the cylindrical battery can be effectively improved. Meanwhile, a conductive agent can be added into the thermosetting resin for bonding the full-lug and the current collecting disc, so that good conductive performance can be kept between the full-lug and the current collecting disc. The thermosetting resin mixture has good plasticity and cohesiveness, can realize the stable connection between the full tab and the current collecting disc, and ensures that the prepared cylindrical battery has good thermal stability, corrosion resistance and excellent rate capability.
In an embodiment of the present invention, the step of heating and curing the bonding position of the full tab and the current collecting disc, and assembling a housing to obtain a cylindrical battery includes:
heating and curing the adhesion part of the full lug and the current collecting disc;
and the cylindrical battery cell is wrapped by the shell cover plate which is arranged on the shell main body and matched with the shell main body, so that the cylindrical battery is obtained.
Specifically, in order to facilitate the assembly of the cylindrical battery, the case of the cylindrical battery may include a case main body and a case cover plate. After the adhesion of the full lug and the current collecting disc is completed, the cylindrical battery cell can be wrapped by the shell main body, and the shell cover plate matched with the shell main body is arranged to be connected with the shell main body, so that the cylindrical battery cell can be protected by the shell to obtain the cylindrical battery.
As a specific example of the present invention, as shown in fig. 1 to 3, the cylindrical battery may include a winding core 1, and the ends of the winding core 1 may be used as tabs, so that full tabs may be formed at both ends of the winding core 1. The full tab includes a positive tab end 11 and a negative tab end 12. In the production process of the battery, a thermosetting resin and a conductive agent may be mixed to obtain a thermosetting resin mixture having conductivity, and then, the thermosetting resin mixture is applied to the positive electrode tab 11 and the negative electrode tab 12, and thereafter, the positive electrode tab 11 and the negative electrode tab 12 coated with the thermosetting resin mixture are respectively pressure-bonded to the current collecting plate 4, thereby completing the mounting of the current collecting plate. Thereafter, the case main body 2 and the case cover 3 mated with the case main body 2 may be further assembled so that the core of the cylindrical battery may be wrapped by the case, thereby obtaining the cylindrical battery.
The invention also discloses a cylindrical battery, and the cylindrical battery is prepared by the preparation method. The specific structural form and the preparation method of the cylindrical battery have been described in detail in the foregoing embodiments, and are not described herein again.
According to the cylindrical battery provided by the embodiment of the invention, the full lug and the current collecting disc are connected in a bonding mode in the preparation process, so that structural damage caused by metal foreign matters, lug extrusion deformation and the like introduced by laser/hardware cutting and clipping can be avoided, and the structural stability, the conductivity and the safety performance of the full lug cylindrical battery are improved. Meanwhile, byproducts such as metal chips, burrs, welding slag and the like generated in the welding process can be avoided. The safety and the production efficiency of the cylindrical battery can be effectively improved. Meanwhile, a conductive agent can be added into the thermosetting resin for bonding the full-lug and the current collecting disc, so that good conductive performance can be kept between the full-lug and the current collecting disc. The thermosetting resin mixture has good plasticity and cohesiveness, can realize the stable connection between the full tab and the current collecting disc, and ensures that the prepared cylindrical battery has good thermal stability, corrosion resistance and excellent rate capability.
The invention further discloses a vehicle which comprises the cylindrical battery. The specific structural form and the preparation method of the cylindrical battery have been described in detail in the foregoing embodiments, and are not described herein again.
According to the vehicle provided by the embodiment of the invention, the cylindrical battery contained in the vehicle is connected with the full lug and the current collecting disc in a bonding mode in the preparation process, so that structural damage caused by metal foreign matters, lug extrusion deformation and the like introduced by laser/hardware cutting and clipping can be avoided, and the structural stability, the conductivity and the safety performance of the full lug cylindrical battery are improved. Meanwhile, byproducts such as metal chips, burrs, welding slag and the like generated in the welding process can be avoided. The safety and the production efficiency of the cylindrical battery can be effectively improved. Meanwhile, a conductive agent can be added into the thermosetting resin for bonding the full-lug and the current collecting disc, so that good conductive performance can be kept between the full-lug and the current collecting disc. The thermosetting resin mixture has good plasticity and cohesiveness, can realize the stable connection between the full tab and the current collecting disc, and ensures that the prepared cylindrical battery has good thermal stability, corrosion resistance and excellent rate capability.
In order to make the present invention more comprehensible to those skilled in the art, the method of manufacturing the cylindrical battery of the present invention will be described below by way of a plurality of specific examples.
Example 1
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) uniformly mixing 5g of epoxy resin, 5g of conductive carbon black and 2g of copper powder to obtain a thermosetting resin mixture with conductivity;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the lug of the battery cell coated with the thermosetting resin mixture and the current collecting disc at 2MPa for 5 minutes to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc at 60 ℃ for 180 minutes to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
Example 2
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) uniformly mixing 4g of acrylic resin, 2g of polyester resin, 3g of aluminum powder, 3g of conductive carbon black and 1g of carbon nano tube to obtain a conductive thermosetting resin mixture;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and keeping the battery cell lug coated with the thermosetting resin mixture and the current collecting disc in a pressurized adhesion manner for 10 minutes under the pressure of 5MPa to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc for 15 minutes at 110 ℃ to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
Example 3
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) uniformly mixing 2g of modified polyurethane, 2g of cyanate ester, 1g of silver powder, 2g of conductive carbon black, 2g of carbon nano tube and 2g of conductive graphite powder to obtain a conductive thermosetting resin mixture;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the lug of the battery cell coated with the thermosetting resin mixture and the current collecting disc at 15MPa for 2 minutes to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc at 105 ℃ for 30 minutes to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
Example 4
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) uniformly mixing 3g of thermosetting polyimide, 2g of vinyl ester, 2g of nickel powder, 4g of conductive graphite powder and 2g of conductive carbon fiber powder to obtain a conductive thermosetting resin mixture;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the lug of the battery cell coated with the thermosetting resin mixture and the current collecting disc at 10MPa for 3 minutes to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc at 85 ℃ for 45 minutes to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
Example 5
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) uniformly mixing 6g of bismaleimide, 1g of vinyl ester, 2g of aluminum powder, 4g of conductive carbon black and 3g of graphene to obtain a conductive thermosetting resin mixture;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the lug of the battery cell coated with the thermosetting resin mixture and the current collecting disc at 8MPa for 4 minutes to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc at 65 ℃ for 120 minutes to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
Example 6
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) uniformly mixing 2g of thermosetting polyimide, 1g of cyanate ester, 1g of aluminum powder, 2g of conductive carbon fiber powder, 2g of carbon nano tube and 2g of conductive graphite powder to obtain a conductive thermosetting resin mixture;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the lug of the battery cell coated with the thermosetting resin mixture and the current collecting disc at 10MPa for 5 minutes to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc at 105 ℃ for 30 minutes to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
Example 7
The preparation method of the cylindrical battery adopting the thermosetting resin without the tab/full tab connection in the embodiment comprises the following specific steps:
(1) 2.5g of bismaleimide, 2g of acrylic resin, 4g of epoxy resin, 1g of copper powder and 0.5g of conductive graphite powder are uniformly mixed to obtain a thermosetting resin mixture with conductivity;
(2) coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and keeping the battery cell lug coated with the thermosetting resin mixture and the current collecting disc in a pressurized adhesion manner for 10 minutes under the pressure of 5MPa to obtain the cylindrical battery cell adhered with the current collecting disc;
(3) and heating and curing the cylindrical battery cell adhered with the current collecting disc at 70 ℃ for 90 minutes to obtain the cylindrical battery connected by thermosetting resin without lugs/full lugs.
The present invention provides a cylindrical battery, a method for manufacturing the cylindrical battery, and a vehicle, which are described in detail above, and the principle and the implementation of the present invention are explained herein by using specific examples, and the description of the above examples is only used to help understand the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of making a cylindrical battery, comprising:
mixing thermosetting resin and a conductive agent to obtain a thermosetting resin mixture with conductivity;
coating the thermosetting resin mixture on the full lug of the cylindrical battery cell, and pressing and adhering the full lug coated with the thermosetting resin mixture and the current collecting disc to obtain the cylindrical battery cell adhered with the current collecting disc;
and heating and curing the adhesion part of the full lug and the current collecting disc, and assembling a shell to obtain the cylindrical battery.
2. The method according to claim 1, wherein the thermosetting resin comprises at least one of an epoxy resin, an acrylic resin, a modified polyurethane, a polyester resin, a vinyl ester, a bismaleimide, a thermosetting polyimide, and a cyanate ester.
3. The production method according to claim 1, wherein the conductive agent comprises at least one of copper powder, aluminum powder, silver powder, nickel powder, conductive carbon black, carbon nanotubes, graphene, conductive graphite powder, and conductive carbon fiber powder.
4. The method according to claim 1, wherein the mass ratio of the thermosetting resin to the conductive agent is (30-85)/(70-15).
5. The manufacturing method according to claim 1, wherein in the step of pressure-bonding the full tab coated with the thermosetting resin mixture to the current collecting plate, the pressure-bonding pressure is 2 to 15MPa, and the holding time is 2 to 10 minutes.
6. The preparation method according to claim 1, wherein in the step of heating and curing the bonding part of the full tab and the current collecting disc, the heating and curing temperature is 60-110 ℃, and the heating time is 10-180 minutes.
7. The production method according to claim 1, wherein the full tab edge of the cylindrical battery is provided with an insulating layer;
the step of coating the thermosetting resin mixture on the full tab of the cylindrical battery cell includes:
and coating the thermosetting resin mixture on the full lug in the insulating layer of the cylindrical battery cell.
8. The manufacturing method according to claim 1, wherein the step of heating and curing the bonding position of the full tab and the current collecting plate and assembling a housing to obtain a cylindrical battery comprises the following steps:
heating and curing the adhesion part of the full lug and the current collecting disc;
and the cylindrical battery cell is wrapped by the shell cover plate which is arranged on the shell main body and matched with the shell main body, so that the cylindrical battery is obtained.
9. A cylindrical battery, characterized in that it is produced by the production method according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the cylindrical battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013893.8A CN114361569B (en) | 2022-01-06 | 2022-01-06 | Cylindrical battery, preparation method thereof and vehicle |
Applications Claiming Priority (1)
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| CN116505053A (en) * | 2023-06-28 | 2023-07-28 | 广汽埃安新能源汽车股份有限公司 | Full-lug cylindrical battery cell, battery, electric equipment and preparation method thereof |
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