CN113161653A - Stainless steel composite plate and battery - Google Patents
Stainless steel composite plate and battery Download PDFInfo
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- CN113161653A CN113161653A CN202110485318.3A CN202110485318A CN113161653A CN 113161653 A CN113161653 A CN 113161653A CN 202110485318 A CN202110485318 A CN 202110485318A CN 113161653 A CN113161653 A CN 113161653A
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 219
- 239000010935 stainless steel Substances 0.000 title claims abstract description 219
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 239000003792 electrolyte Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 8
- 230000007797 corrosion Effects 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 257
- 239000012790 adhesive layer Substances 0.000 claims description 49
- 239000002344 surface layer Substances 0.000 claims description 40
- 230000002708 enhancing effect Effects 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000005488 sandblasting Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004813 Perfluoroalkoxy alkane Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 238000003754 machining Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- KHXKESCWFMPTFT-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2-trifluoroethenoxy)propane Chemical compound FC(F)=C(F)OC(F)(F)C(F)(F)C(F)(F)F KHXKESCWFMPTFT-UHFFFAOYSA-N 0.000 description 1
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a stainless steel composite board and a battery, wherein the stainless steel composite board at least sequentially comprises a first stainless steel layer, an insulating bonding layer and a second stainless steel layer; the thickness d1 of the first stainless steel layer is 0.1mm-5 mm; the thickness d2 of the insulating bonding layer is 0.05mm-10mm, and the insulating bonding layer is used for preventing the first stainless steel layer and the second stainless steel layer from being electrically conducted, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell; the thickness d3 of the second stainless steel layer is 0.1mm-5 mm; before the battery shell is sealed, the insulating bonding layer is melted at the temperature of more than or equal to 100 ℃ and is seamlessly bonded with the first stainless steel layer and the second stainless steel layer, and the bonding strength between the insulating bonding layer and the first stainless steel layer and the second stainless steel layer at the cooling normal temperature is more than or equal to 1.0N per square millimeter.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a stainless steel composite plate and a battery.
Background
The battery shell of the conventional button battery is formed by splicing an anode shell, a cathode shell and an insulating plastic sleeve, and the anode shell and the cathode shell need to be insulated to avoid short circuit of the button battery; the insulating film is arranged between the anode shell and the cathode shell to realize insulation in the related art, in the related production process, the insulating plastic sleeve is extruded to seal the whole shell through the anode shell and the cathode shell, the anode shell and the cathode shell are fixed in a welding mode, the existing shell is packaged only by extruding the anode shell and the cathode shell in the machining process, so that the sealing effect is poor, a large amount of button cells have leakage, the insulating film is high in setting difficulty, the button cells are high in machining difficulty, and the machining efficiency is reduced.
Disclosure of Invention
The invention mainly aims to provide a stainless steel composite plate for a battery shell, and aims to solve the technical problems of improving the processing efficiency of a battery and poor sealing property.
In order to achieve the purpose, the stainless steel composite board provided by the invention at least sequentially comprises a first stainless steel layer, an insulating bonding layer and a second stainless steel layer;
the thickness d1 of the first stainless steel layer is 0.1mm-5mm, and the first stainless steel layer is used for electrically conducting with one electrode of the battery cell inside the battery shell and preventing moisture outside the battery shell from permeating into the shell;
the thickness d2 of the insulating bonding layer is 0.05mm-10mm, and the insulating bonding layer is used for preventing the first stainless steel layer and the second stainless steel layer from being electrically conducted, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell;
the thickness d3 of the second stainless steel layer is 0.1mm-5mm, and the second stainless steel layer is used for electrically communicating with the other electrode of the battery cell in the battery shell and preventing moisture outside the battery shell from permeating into the shell;
before the battery shell is sealed, the insulating bonding layer is melted at the temperature of more than or equal to 100 ℃ and is seamlessly bonded with the first stainless steel layer and the second stainless steel layer, and the bonding strength between the insulating bonding layer and the first stainless steel layer and the second stainless steel layer at the cooling normal temperature is more than or equal to 1.0N per square millimeter.
Optionally, the first stainless steel layer is made of SUS304, and/or the second stainless steel layer is made of SUS 304.
Optionally, the insulating adhesive layer is made of one or more of PP, PFA, PVDF, PTFE, ETFE, and PVC.
Optionally, the bonding strength between the insulating bonding layer and the first stainless steel layer and between the insulating bonding layer and the second stainless steel layer at a cooling normal temperature is less than or equal to 5.0N per square millimeter.
Optionally, the insulating bonding layer melts at 850 ℃ or lower and is seamlessly bonded with the first stainless steel layer and the second stainless steel layer.
Optionally, a first adhesion enhancement layer is arranged on the first stainless steel layer, which is close to the first surface layer of the insulating adhesion layer, and is used for enhancing the adhesion strength between the first stainless steel layer and the insulating adhesion layer; and/or a second bonding enhancement layer is arranged on a second surface layer, close to the insulating bonding layer, of the second stainless steel layer and used for enhancing the bonding strength between the second stainless steel layer and the insulating bonding layer.
Optionally, the first bonding enhancement layer is a uniform first rough surface layer formed by processing the first stainless steel layer close to the first surface layer of the insulating bonding layer by sand blasting; and/or the second bonding enhancement layer is a second surface layer of the second stainless steel layer close to the insulating bonding layer and is processed by sand blasting to form a uniform second rough surface layer.
Optionally, the first adhesion enhancement layer is a first inclined plate protruding from the first surface layer and having a certain inclination angle with the first surface layer, a height h1 of the first inclined plate is smaller than a thickness d2 of the insulating adhesive layer, the second adhesion enhancement layer is a second inclined plate protruding from the second surface layer and having a certain inclination angle with the second surface layer, a height h2 of the second inclined plate is smaller than a thickness d2 of the insulating adhesive layer, and the first inclined plate and the second inclined plate are opposite in inclination direction and are alternately arranged with each other.
Optionally, the first adhesion enhancement layer is a first groove recessed into the first surface layer, and a recessed direction of the first groove is far away from the insulating adhesion layer; and/or the second bonding enhancement layer is a second groove sunken in the second surface layer, and the sunken direction of the second groove is far away from the direction of the insulating bonding layer.
The invention also provides a battery, which comprises a battery shell, wherein at least part of the battery shell is a stainless steel composite plate, and the stainless steel composite plate at least sequentially comprises a first stainless steel layer, an insulating bonding layer and a second stainless steel layer; the thickness d1 of the first stainless steel layer is 0.1mm-5mm, and the first stainless steel layer is used for electrically conducting with one electrode of the battery cell inside the battery shell and preventing moisture outside the battery shell from permeating into the shell; the thickness d2 of the insulating bonding layer is 0.05mm-10mm, and the insulating bonding layer is used for preventing the first stainless steel layer and the second stainless steel layer from being electrically conducted, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell; the thickness d3 of the second stainless steel layer is 0.1mm-5mm, and the second stainless steel layer is used for electrically communicating with the other electrode of the battery cell in the battery shell and preventing moisture outside the battery shell from permeating into the shell; before the battery shell is sealed, the insulating bonding layer is melted at the temperature of more than or equal to 100 ℃ and is seamlessly bonded with the first stainless steel layer and the second stainless steel layer, and the bonding strength between the insulating bonding layer and the first stainless steel layer and the second stainless steel layer at the cooling normal temperature is more than or equal to 1.0N per square millimeter;
a battery element having at least a positive electrode, a negative electrode and an electrolyte within said battery housing, said positive electrode being in electrical communication with said first stainless steel layer and said negative electrode being in electrical communication with said second stainless steel layer.
In the technical scheme of the invention, the insulating bonding layer is melted at the temperature of more than or equal to 100 ℃ and is seamlessly bonded with the first stainless steel layer and the second stainless steel layer, the bonding strength of the insulating bonding layer, the first stainless steel layer and the second stainless steel layer at the cooling normal temperature is adjusted to be more than or equal to 0.1N per square millimeter, the thickness of the first stainless steel layer and the thickness of the second stainless steel layer are set to be 0.1mm-5mm, and the thickness of the insulating bonding layer is set to be 0.05mm-10mm, so that the insulating connection between the first stainless steel layer and the second stainless steel layer can be ensured, and the stability of the stainless steel layer and the insulating bonding layer can also be ensured; after the stainless steel composite board is manufactured, the first stainless steel layer and the second stainless steel layer can be continuously processed to form the shape of the battery shell, wherein the first stainless steel layer can form an anode shell, the second stainless steel layer can form a cathode shell, and the anode shell and the cathode shell can be connected in a sealing and insulating mode through the insulating bonding layer, so that the processing difficulty of the battery shell is reduced, and the processing efficiency of a battery is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a stainless steel composite plate according to the present invention;
FIG. 2 is a schematic cross-sectional view of one embodiment of a stainless steel composite plate according to the present invention;
FIG. 3 is a schematic cross-sectional view of another embodiment of a stainless steel composite panel according to the present invention;
FIG. 4 is a schematic cross-sectional view of another embodiment of a stainless steel composite panel according to the present invention;
FIG. 5 is a schematic cross-sectional view of another embodiment of a stainless steel composite panel in accordance with the present invention;
fig. 6 is a schematic cross-sectional view of a battery according to an embodiment of the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | First |
20 | Second |
30 | Insulating |
| 11 | First |
21 | Second |
111 | First |
| 211 | Second |
112 | The |
212 | |
| 40 | |
50 | Negative electrode |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a stainless steel composite plate for a battery shell.
In the embodiment of the present invention, as shown in fig. 1 to 5, the stainless steel composite plate at least has a first stainless steel layer 10, an insulating adhesive layer 30, and a second stainless steel layer 20 in this order; the thickness d1 of the first stainless steel layer 10 is 0.1mm-5mm, and is used for electrically conducting with one of the electrodes of the battery cell in the battery shell and preventing moisture outside the battery shell from permeating into the shell; by way of specific illustration, d1 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, it being understood that the specific stainless steel thickness can be specifically designed for a specific product, with a preferred choice of thickness d1 of 0.1mm to 0.25mm for small button cells and a preferred choice of thickness d1 of 1mm to 3mm for power cells, battery cells and the like to ensure safety.
The thickness d2 of the insulating adhesive layer 30 is 0.05mm-10mm, and is used for preventing the first stainless steel layer 10 and the second stainless steel layer 20 from being electrically conducted, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell; by way of specific illustration, d2 can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 3.0mm, 4mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, it being understood that the specific insulating adhesive layer 30 thickness can be specifically designed for a specific product, for small button cells, the preferred choice thickness d2 is 0.15mm to 0.25mm, for ensuring the safety of power batteries, battery of battery cars and the like, the preferable thickness is 1mm-5mm, the preferable selection thickness d2, in order to ensure that the first stainless steel layer 10 and the second stainless steel layer 20 can be firmly bonded, meanwhile, contact short circuit between the insulating and bonding layers is avoided, the insulating and bonding layer is relatively thick and good in thickness, and the leakage part of the insulating and bonding layer 30 needs to be reduced as much as possible due to certain penetration.
The thickness d3 of the second stainless steel layer 20 is 0.1mm-5mm, and is used for electrically communicating with the other electrode of the battery cell in the battery shell and preventing moisture outside the battery shell from permeating into the shell; by way of specific illustration, d3 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, it being understood that the specific stainless steel thickness can be specifically designed for a specific product, with a preferred choice of thickness d3 of 0.1mm to 0.25mm for small button cells and a preferred choice of thickness d3 of 1mm to 3mm for power cells, battery cells and the like to ensure safety.
Before the battery shell is sealed, the insulating adhesive layer 30 is melted at the temperature of more than or equal to 100 ℃ and is seamlessly adhered with the first stainless steel layer 10 and the second stainless steel layer 20, the adhesion strength between the insulating adhesive layer 30 and the first stainless steel layer 10 and the second stainless steel layer 20 at the cooling normal temperature is more than or equal to 1.0N per square millimeter, the temperature is more than or equal to 100 ℃, firstly, the insulating adhesive layer 30 is melted, meanwhile, the moisture, grease and the like on the surfaces of the first stainless steel layer 10 and the second stainless steel layer 20 can be volatilized at the temperature of more than or equal to, and the adhesion strength between the insulating adhesive layer 30 and the first stainless steel layer 10 and the second stainless steel layer 20 is ensured.
The first stainless steel layer 10 and the second stainless steel layer 20 are provided as stainless steel plates, and the insulating adhesive layer 30 forms an interlayer between the first stainless steel layer 10 and the second stainless steel layer 20. The specific material of the insulating adhesive layer 30 is not limited, and it is sufficient that the first stainless steel layer 10 and the second stainless steel layer 20 can be adhered and fixed, corrosion of the electrolyte can be prevented, and the first stainless steel layer 10 and the second stainless steel layer 20 are not electrically conducted through the insulating adhesive layer 30.
For example, the insulating adhesive layer 30 may be made of one or more of PP (polypropylene), PFA (a small amount of copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), ETFE (ethylene-tetrafluoroethylene copolymer), and PVC (polyvinyl chloride). The stainless steel composite plate can be processed into a battery shell and then combined with the battery core and the electrolyte to form the button battery. The first stainless steel layer 10 can form an anode shell, the second stainless steel layer 20 can form a cathode shell, the anode shell is connected with an anode 40 of the battery cell, the cathode shell is connected with a cathode 50 of the battery cell, and the anode shell and the cathode shell are insulated and hermetically connected through the insulating bonding layer 30, so that electrolyte leakage can be prevented, and external moisture can be prevented from permeating into the battery shell.
Insulating adhesive linkage 30 has corrosion resistance to avoid being corroded by the electrolyte and impaired, compare with current battery case, because carry out seamless bonding between insulating adhesive linkage 30 and first stainless steel layer 10 and second stainless steel layer 20, and do before the battery case encapsulation, the production and processing of being convenient for like this, battery case's leakproofness has been improved simultaneously, when insulating adhesive linkage 30 surpassed adhesive strength simultaneously, still can split, play the guard action to the battery, avoid leading to the inside a large amount of gas explosions that produce of battery because some circumstances.
The thickness d1 of the first stainless steel layer 10 and the thickness d3 of the second stainless steel layer 20 are set to 0.1mm to 5mm, so that the first stainless steel layer 10 and the second stainless steel layer 20 have sufficient structural strength, and the overall size of the battery case made of the stainless steel composite plate can be reasonably controlled. The thickness d2 of the insulating adhesive layer 30 is set to be 0.05mm-10mm, so that the insulating adhesive layer 30 can stably bear the change of temperature or external acting force in the subsequent process of processing the stainless steel composite plate, the bonding stability of the insulating adhesive layer 30 is improved, and the overall size of the battery shell made of the stainless steel composite plate can be reasonably controlled.
The bonding strength between the insulating bonding layer 30 and the first stainless steel layer 10 and the second stainless steel layer 20 is set to be greater than or equal to 1.0N per square millimeter at the cooling normal temperature, so that the first stainless steel layer 10 or the second stainless steel layer 20 can be prevented from easily falling off from the insulating bonding layer 30 in the subsequent processing of the stainless steel composite plate or the use of a battery made of the stainless steel composite plate, and the structural stability of the stainless steel composite plate is ensured. Specifically, the bonding strength between the insulating bonding layer 30 and the first stainless steel layer 10 and between the insulating bonding layer and the second stainless steel layer 20 at the cooling normal temperature is less than or equal to 5.0N/mm, so as to prevent the internal stress of the stainless steel composite plate from being too high, thereby preventing the first stainless steel layer 10 or the second stainless steel layer 20 from being damaged due to the internal acting force when the stainless steel composite plate is processed, and simultaneously protecting the battery.
The first stainless steel layer 10 is made of SUS304, and/or the second stainless steel layer 20 is made of SUS 304. SUS304 is 304 stainless steel, contains high nickel, has an austenite single-phase structure at room temperature, has high corrosion resistance, good cold forming and weldability, and has high plasticity and toughness at low temperature, room temperature and high temperature. The first stainless steel layer 10 and the second stainless steel layer 20 are set to SUS304, which can ensure structural stability of the stainless steel composite plate during processing and chemical stability when used as a battery case.
Since the stainless steel composite plate realizes the insulation connection of the first stainless steel layer 10 and the second stainless steel layer 20 before being processed into the battery shell, after the first stainless steel layer 10 and the second stainless steel layer 20 are processed to form the anode shell and the cathode shell, the anode shell and the cathode shell do not need to be connected or insulated through other procedures, so that the processing difficulty of the battery shell can be reduced, and the processing efficiency of the battery can be improved.
In the technical scheme of the invention, the insulating bonding layer 30 is melted at a temperature of more than or equal to 100 ℃ and is seamlessly bonded with the first stainless steel layer 10 and the second stainless steel layer 20, the bonding strength of the insulating bonding layer 30, the first stainless steel layer 10 and the second stainless steel layer 20 at a cooling normal temperature is adjusted to be more than or equal to 0.1N per square millimeter, the thickness of the first stainless steel layer 10 and the thickness of the second stainless steel layer 20 are set to be 0.1mm-5mm, and the thickness of the insulating bonding layer 30 is set to be 0.1mm-10mm, so that the insulating connection of the first stainless steel layer 10 and the second stainless steel layer 20 can be ensured, and the stability of the stainless steel layer and the insulating bonding layer 30 can be ensured; after the stainless steel composite board is manufactured, the first stainless steel layer 10 and the second stainless steel layer 20 can be continuously processed to form the shape of the battery shell, wherein the first stainless steel layer 10 can form an anode shell, the second stainless steel layer 20 can form a cathode shell, and the anode shell and the cathode shell can be hermetically and insulatively connected through the insulating bonding layer 30, so that the processing difficulty of the battery shell is reduced, and the processing efficiency of the battery is improved.
In one embodiment, the insulating adhesive layer 30 is melted at 850 ℃ or less to be seamlessly adhered to the first stainless steel layer 10 and the second stainless steel layer 20. That is, the insulating adhesive layer 30 is melted at 100 ℃ to 850 ℃ to be seamlessly adhered to the first stainless steel layer 10 and the second stainless steel layer 20, so that the insulating adhesive layer 30 is sufficiently melted to be sufficiently contacted with the first stainless steel layer 10 and the second stainless steel layer 20, thereby ensuring the adhesive strength of the insulating adhesive layer 30; the specific temperature may be, for example, 100 ℃, 105 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 180 ℃, 200 ℃, 250 ℃, 300 ℃, 600 ℃, 700 ℃, 800 ℃, 850 ℃, and it should be understood that the specific temperature is determined according to the specific insulating adhesive layer 30, and is not limited thereto, and the seamless adhesion between the insulating adhesive layer 30 and the first stainless steel layer 10 and the second stainless steel layer 20 is achieved within a temperature range in which the material characteristics of the insulating adhesive layer 30 are not damaged while the insulating adhesive layer 30 is melted.
In one embodiment, as shown in fig. 3 to 5, the first stainless steel layer 10 is provided with a first adhesion enhancing layer 11 adjacent to the first surface layer of the insulating adhesive layer 30 for enhancing the adhesion strength with the insulating adhesive layer 30; and/or a second bonding enhancement layer 21 is arranged on a second surface layer of the second stainless steel layer 20 close to the insulating bonding layer 30, and is used for enhancing the bonding strength between the second stainless steel layer and the insulating bonding layer 30. The specific form of the first adhesion enhancing layer 11 is not limited, and it is sufficient to increase the connection area with the insulating adhesive layer 30 to enhance the adhesion strength. For example, the first adhesion enhancing layer 11 may be provided as a protrusion. The specific form and function of the second adhesion enhancing layer 21 can refer to the first adhesion enhancing layer 11, and it should be noted that the first adhesion enhancing layer 11 and the second adhesion enhancing layer 21 can indirectly cooperate with each other through the insulating adhesive layer 30, so as to further improve the stability of the combination of the first stainless steel layer 10, the second stainless steel layer 20 and the insulating adhesive layer 30.
Specifically, as shown in fig. 3, the first adhesion enhancement layer 11 is a uniform first rough surface layer formed by processing a first surface layer of the first stainless steel layer 10 close to the insulating adhesion layer 30 by sandblasting; and/or the second bonding enhancement layer 21 is a second surface layer of the second stainless steel layer 20 close to the insulating bonding layer 30, which is processed by sand blasting to form a uniform second rough surface layer. It is understood that uniform in this embodiment does not mean absolutely uniform, but rather a natural uniform matte surface formed by grit blasting the first surface layer. The first rough surface layer enables the adhesion force of each part of the first surface layer and the insulating adhesive layer 30 to be more uniform, so that stress concentration is avoided. Similarly, the second rough surface layer can make the adhesion force between each part of the second surface layer and the insulating adhesive layer 30 more uniform. The first and second bonding reinforcement layers 11 and 21 are formed by sand blasting, so that the processing manner of the first and second bonding reinforcement layers 11 and 21 can be simplified to improve the processing efficiency.
As shown in fig. 4, the first adhesion enhancing layer 11 is a first inclined plate 111 protruding from the first surface layer and having a certain inclination angle with the first surface layer, a height h1 of the first inclined plate 111 is smaller than a thickness d2 of the insulating adhesive layer 30, the second adhesion enhancing layer 21 is a second inclined plate 211 protruding from the second surface layer and having a certain inclination angle with the second surface layer, a height h2 of the second inclined plate 211 is smaller than a thickness d2 of the insulating adhesive layer 30, and the first inclined plate 111 and the second inclined plate 211 are inclined in opposite directions and are alternately arranged with each other. The number of the first inclined pieces 111 is multiple and distributed on the first surface layer, and the melted adhesive insulating layer can fill the space between two adjacent first inclined pieces 111 to be adhered and connected with the side surface of each first inclined piece 111. The height of the first inclined plate 111, i.e. the vertical distance between the end of the first inclined plate 111 and the first surface layer, is less than the thickness of the insulating adhesive layer 30, so that the first inclined plate 111 can be prevented from contacting the second stainless steel layer 20 after penetrating through the insulating adhesive layer 30. The distribution and action of the second inclined pieces 211 can be referred to the first inclined pieces 111. The first inclined pieces 111 and the second inclined pieces 211 are alternately arranged with each other in the length direction, so that the first inclined pieces 111 and the second inclined pieces 211 inserted into the insulating adhesive layer 30 can be adjacent to each other, and the first stainless steel layer 10 and the second stainless steel layer 20 can be closer without reducing the thickness of the insulating adhesive layer 30, thereby improving the structural strength of the stainless steel composite plate.
As shown in fig. 5, the first adhesion enhancement layer 11 is a first groove 112 recessed into the first surface layer, and the recessed direction of the first groove 112 is away from the insulating adhesion layer 30; and/or the second adhesion enhancement layer 21 is a second groove 212 recessed into the second surface layer, and the recessed direction of the second groove 212 is away from the insulating adhesion layer 30. The number of the first grooves 112 is plural, the plural first grooves 112 are distributed on the first surface layer, and the melted insulating adhesive layer 30 can be filled in the first grooves 112 to increase the connection area with the first surface layer, thereby enhancing the adhesive strength of the first stainless steel layer 10 and the insulating adhesive layer. The arrangement and function of the second groove 212 can refer to the first groove 112, and will not be described herein.
As shown in fig. 6, the present invention further provides a battery, which includes a battery case, wherein at least a portion of the battery case is a stainless steel composite plate, and the specific structure of the stainless steel composite plate refers to the above embodiments. Wherein the battery cell has at least a positive electrode 40, a negative electrode 50, and an electrolyte within the cell casing, the positive electrode 40 being in electrical communication with the first stainless steel layer 10, and the negative electrode 50 being in electrical communication with the second stainless steel layer 20. It is understood that the first stainless steel layer 10 and the second stainless steel layer 20 may be formed into a battery case by bending, or the battery case may be formed by connecting stainless steel plates.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A stainless steel composite plate for a battery case, characterized in that,
the stainless steel composite board at least sequentially comprises a first stainless steel layer, an insulating bonding layer and a second stainless steel layer;
the thickness d1 of the first stainless steel layer is 0.1mm-5mm, and the first stainless steel layer is used for electrically conducting with one electrode of the battery cell inside the battery shell and preventing moisture outside the battery shell from permeating into the shell;
the thickness d2 of the insulating bonding layer is 0.05mm-10mm, and the insulating bonding layer is used for preventing the first stainless steel layer and the second stainless steel layer from being electrically conducted, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell;
the thickness d3 of the second stainless steel layer is 0.1mm-5mm, and the second stainless steel layer is used for electrically communicating with the other electrode of the battery cell in the battery shell and preventing moisture outside the battery shell from permeating into the shell;
before the battery shell is sealed, the insulating bonding layer is melted at the temperature of more than or equal to 100 ℃ and is seamlessly bonded with the first stainless steel layer and the second stainless steel layer, and the bonding strength between the insulating bonding layer and the first stainless steel layer and the second stainless steel layer at the cooling normal temperature is more than or equal to 1.0N per square millimeter.
2. The stainless steel composite plate according to claim 1, wherein the first stainless steel layer is made of SUS304, and/or the second stainless steel layer is made of SUS 304.
3. The stainless steel composite plate of claim 1, wherein the insulating adhesive layer is made of one or more of PP, PFA, PVDF, PTFE, ETFE and PVC.
4. The stainless steel composite panel of claim 1, wherein the bond strength between the insulating bonding layer and the first stainless steel layer and the second stainless steel layer is 5.0N per square millimeter or less at a cold ambient temperature.
5. The stainless steel composite plate of claim 1, wherein the insulating adhesive layer melts at 850 ℃ or less and is seamlessly adhered to the first stainless steel layer and the second stainless steel layer.
6. The stainless steel composite plate according to any one of claims 1 to 5, wherein the first stainless steel layer is provided with a first adhesion enhancing layer adjacent to the first surface layer of the insulating adhesive layer for enhancing the adhesive strength with the insulating adhesive layer; and/or a second bonding enhancement layer is arranged on a second surface layer, close to the insulating bonding layer, of the second stainless steel layer and used for enhancing the bonding strength between the second stainless steel layer and the insulating bonding layer.
7. The stainless steel composite panel of claim 6, wherein the first adhesion enhancing layer is a first surface layer of the first stainless steel layer adjacent to the insulating adhesive layer treated by sand blasting to form a uniform first matte layer; and/or the second bonding enhancement layer is a second surface layer of the second stainless steel layer close to the insulating bonding layer and is processed by sand blasting to form a uniform second rough surface layer.
8. The stainless steel composite panel according to claim 6, wherein the first adhesion enhancing layer is a first inclined plate protruded from the first skin layer and having an inclination angle with the first skin layer, a height h1 of the first inclined plate is smaller than a thickness d2 of the insulating adhesive layer, the second adhesion enhancing layer is a second inclined plate protruded from the second skin layer and having an inclination angle with the second skin layer, a height h2 of the second inclined plate is smaller than a thickness d2 of the insulating adhesive layer, and the first inclined plate and the second inclined plate are inclined in opposite directions and are alternately arranged with each other.
9. The stainless steel composite panel of claim 6, wherein the first adhesion enhancing layer is a first groove recessed into the first surface layer, the first groove being recessed in a direction away from the insulating adhesive layer; and/or the second bonding enhancement layer is a second groove sunken in the second surface layer, and the sunken direction of the second groove is far away from the direction of the insulating bonding layer.
10. A battery comprising a battery housing, said battery housing being at least partially a stainless steel composite sheet as claimed in any one of claims 1 to 9, said battery housing having at least a cell element having a positive electrode, a negative electrode and an electrolyte therein, said positive electrode being in electrical communication with said first stainless steel layer and said negative electrode being in electrical communication with said second stainless steel layer.
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| CN202110485318.3A CN113161653B (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite board and battery |
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| CN202110485318.3A CN113161653B (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite board and battery |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11339734A (en) * | 1998-05-28 | 1999-12-10 | Japan Storage Battery Co Ltd | Battery |
| JP2006117990A (en) * | 2004-10-21 | 2006-05-11 | Nippon Steel Corp | Multi-layer stainless steel sheet and battery case using the same |
| CN201498535U (en) * | 2009-09-30 | 2010-06-02 | 广州市云通磁电有限公司 | Column-shaped battery case |
| CN201562697U (en) * | 2009-09-11 | 2010-08-25 | 黄友林 | High energy safe lithium ion battery metal polymer composite shell |
| JP2011198557A (en) * | 2010-03-18 | 2011-10-06 | Nisshin Steel Co Ltd | Laminate for battery outer packaging, and secondary battery |
| CN207558934U (en) * | 2017-08-06 | 2018-06-29 | 朱程显 | Lithium coin cells with multilayer steel loop or steel mesh |
| CN210092138U (en) * | 2019-06-25 | 2020-02-18 | 江西双华实业发展有限公司 | Corrosion-resistant anti-pollution battery case |
| CN111599945A (en) * | 2020-06-17 | 2020-08-28 | 惠州惠峰科技有限公司 | Hot-melting fully-sealed button cell shell and assembly process thereof |
| CN112018275A (en) * | 2019-05-28 | 2020-12-01 | 瓦尔达微电池有限责任公司 | Process for producing battery and battery produced by the process |
| CN215070154U (en) * | 2021-04-30 | 2021-12-07 | 国研新能(深圳)技术有限公司 | Stainless steel composite plate and battery |
-
2021
- 2021-04-30 CN CN202110485318.3A patent/CN113161653B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11339734A (en) * | 1998-05-28 | 1999-12-10 | Japan Storage Battery Co Ltd | Battery |
| JP2006117990A (en) * | 2004-10-21 | 2006-05-11 | Nippon Steel Corp | Multi-layer stainless steel sheet and battery case using the same |
| CN201562697U (en) * | 2009-09-11 | 2010-08-25 | 黄友林 | High energy safe lithium ion battery metal polymer composite shell |
| CN201498535U (en) * | 2009-09-30 | 2010-06-02 | 广州市云通磁电有限公司 | Column-shaped battery case |
| JP2011198557A (en) * | 2010-03-18 | 2011-10-06 | Nisshin Steel Co Ltd | Laminate for battery outer packaging, and secondary battery |
| CN207558934U (en) * | 2017-08-06 | 2018-06-29 | 朱程显 | Lithium coin cells with multilayer steel loop or steel mesh |
| CN112018275A (en) * | 2019-05-28 | 2020-12-01 | 瓦尔达微电池有限责任公司 | Process for producing battery and battery produced by the process |
| CN210092138U (en) * | 2019-06-25 | 2020-02-18 | 江西双华实业发展有限公司 | Corrosion-resistant anti-pollution battery case |
| CN111599945A (en) * | 2020-06-17 | 2020-08-28 | 惠州惠峰科技有限公司 | Hot-melting fully-sealed button cell shell and assembly process thereof |
| CN215070154U (en) * | 2021-04-30 | 2021-12-07 | 国研新能(深圳)技术有限公司 | Stainless steel composite plate and battery |
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| CN113161653B (en) | 2024-10-11 |
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