CN215070155U - Stainless steel composite plate and battery - Google Patents
Stainless steel composite plate and battery Download PDFInfo
- Publication number
- CN215070155U CN215070155U CN202120932742.3U CN202120932742U CN215070155U CN 215070155 U CN215070155 U CN 215070155U CN 202120932742 U CN202120932742 U CN 202120932742U CN 215070155 U CN215070155 U CN 215070155U
- Authority
- CN
- China
- Prior art keywords
- layer
- stainless steel
- bonding
- battery
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a stainless steel composite board and a battery, wherein the stainless steel composite board at least sequentially comprises a first stainless steel layer, a first bonding layer, a conduction-proof layer, a second bonding layer and a second stainless steel layer; the first stainless steel layer is used for being electrically communicated with one electrode of the battery cell inside the battery shell and preventing moisture outside the battery shell from permeating into the shell; the first bonding layer is used for bonding the first stainless steel layer and the conduction preventing layer, is resistant to electrolyte corrosion and prevents moisture outside the battery shell from permeating into the shell; the conduction preventing layer is used for preventing the first stainless steel layer and the second stainless steel layer from being conducted electrically, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell; the second bonding layer is used for bonding the second stainless steel layer and the conduction preventing layer, so that the battery shell is resistant to electrolyte corrosion and can prevent moisture outside the battery shell from permeating into the shell; the second stainless steel layer is used for electrically communicating with the other electrode of the battery core in the battery shell.
Description
Technical Field
The utility model relates to a battery technology field, in particular to stainless steel composite sheet and 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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stainless steel composite sheet for battery case aims at solving the technical problem that how to improve battery machining efficiency and leakproofness are poor.
In order to achieve the above purpose, the stainless steel composite board provided by the utility model at least comprises a first stainless steel layer, a first bonding layer, a conduction-proof layer, a second bonding layer and a second stainless steel layer in sequence;
the first stainless steel layer is used for being electrically communicated with one electrode of the battery core in the battery shell and preventing moisture outside the battery shell from permeating into the shell;
the first bonding layer is used for bonding the first stainless steel layer and the conduction preventing layer, is resistant to electrolyte corrosion and prevents moisture outside the battery shell from permeating into the shell;
the conduction preventing layer is used for preventing the first stainless steel layer and the second stainless steel layer from being conducted electrically, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell;
the second bonding layer is used for bonding the second stainless steel layer and the conduction preventing layer, is resistant to electrolyte corrosion and prevents moisture outside the battery shell from permeating into the shell;
the second stainless steel layer is used for being electrically communicated with the other electrode of the battery core in the battery shell and preventing moisture outside the battery shell from permeating into the shell;
the melting temperature of the first bonding layer is lower than that of the conduction-proof layer, and the melting temperature of the second bonding layer is lower than that of the conduction-proof layer;
before the battery shell is sealed, the first bonding layer and the second bonding layer are seamlessly bonded with the first stainless steel layer and the second stainless steel layer respectively at a melting temperature.
Optionally, the thickness d1 of the first stainless steel layer is 0.1mm-5 mm; and/or the thickness d5 of the second stainless steel layer is 0.1mm-5 mm.
Optionally, the thickness d2 of the first adhesive layer is 0.05mm-10 mm; and/or the thickness d4 of the second adhesive layer is 0.05mm-10 mm.
Optionally, the thickness d3 of the conduction-preventing layer is 0.05mm-5 mm.
Optionally, the first stainless steel layer is made of SUS304, and/or the second stainless steel layer is made of SUS 304.
Optionally, the first adhesive layer, the conduction preventing layer and the second adhesive layer are made of one or more of PP, PFA, PVDF, PTFE, ETFE and PVC.
Optionally, the bonding strength between the first bonding layer and the second bonding layer and between the first stainless steel layer and the second stainless steel layer at the cooling normal temperature is greater than or equal to 1.0N per square millimeter and less than or equal to 5.0N per square millimeter.
Optionally, the first adhesive layer and the second adhesive layer are melted at a temperature of 100 ℃ or higher and 350 ℃ or lower and are respectively seamlessly adhered to 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, close to the first surface layer of the first adhesion layer, and is used for enhancing the adhesion strength between the first adhesion layer and the first stainless steel layer; and/or a second bonding enhancement layer is arranged on a second surface layer, close to the second bonding layer, of the second stainless steel layer and used for enhancing the bonding strength between the second bonding layer and the second stainless steel 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 first 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 second bonding layer and is processed by sand blasting to form a uniform second rough surface layer.
Optionally, the first bonding enhancement layer is a first inclined plate protruding 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 first bonding layer, the second bonding enhancement layer is a second inclined plate protruding the second surface layer and having a certain inclination angle with the second surface layer, and a height h2 of the second inclined plate is smaller than a thickness d4 of the second bonding layer.
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 first 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 second bonding layer.
The utility model also provides a battery, which comprises a battery shell, wherein at least part of the battery shell is the stainless steel composite plate; the battery element at least comprises a positive electrode, a negative electrode and electrolyte, wherein the positive electrode is electrically communicated with the first stainless steel layer of the stainless steel composite plate, and the negative electrode is electrically communicated with the second stainless steel layer of the stainless steel composite plate.
In the technical scheme of the utility model, the first stainless steel layer is fixedly connected to one side of the conduction preventing layer through the first bonding layer, and the second stainless steel layer is fixedly connected to the other side of the conduction preventing layer through the second bonding layer, so that the first stainless steel layer and the second stainless steel layer can be connected and insulated from each other; after the stainless steel composite board is made, 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 sealed and connected in an insulating mode through the first bonding layer, the conduction-preventing layer and the second bonding layer, so that the processing difficulty of the battery shell is reduced, and the processing efficiency of the 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 needed to be 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 view of an embodiment of the stainless steel composite plate of the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment of the stainless steel composite plate of the present invention;
FIG. 3 is a schematic cross-sectional view of another embodiment of the stainless steel composite plate of the present invention;
FIG. 4 is a schematic cross-sectional view of another embodiment of the stainless steel composite plate of the present invention;
FIG. 5 is a schematic cross-sectional view of another embodiment of the stainless steel composite plate of the present invention;
fig. 6 is a schematic cross-sectional view of an embodiment of the battery of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | First |
20 | First |
30 | Conduction- |
| 40 | Second |
50 | Second |
11 | First |
| 51 | Second |
111 | First |
511 | Second |
| 112 | The |
512 | |
60 | |
| 70 | Negative electrode |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a stainless steel composite sheet for battery case.
In the embodiment of the present invention, as shown in fig. 1 to 5, the stainless steel composite plate at least sequentially has a first stainless steel layer 10, a first adhesive layer 20, a conduction preventing layer 30, a second adhesive layer 40, and a second stainless steel layer 50; 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 first bonding layer 20 is 0.05mm-10mm, and the first bonding layer is used for bonding the first stainless steel layer 10 and the conduction-preventing layer 30, 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 first bond line 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 50 can be firmly bonded, meanwhile, contact short circuit between the first adhesive layer and the second adhesive layer is avoided, the thickness is relatively thicker and better, but the first adhesive layer has certain penetration, and the leakage part of the first adhesive layer also needs to be reduced as much as possible.
The thickness d3 of the conduction preventing layer 30 is 0.05mm-5mm, and is used for preventing the first stainless steel layer 10 and the second stainless steel layer 50 from being electrically conducted, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell; the thickness d4 of the second bonding layer 40 is 0.05mm-10mm, and the second bonding layer is used for bonding the second stainless steel layer 50 and the conduction-preventing layer 30, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell; by way of specific illustration, d4 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 second adhesive layer 40 thickness can be specifically designed for a specific product, for small button cells, the preferred choice thickness d4 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 d4, in order to ensure that the first stainless steel layer 10 and the second stainless steel layer 50 can be firmly bonded, meanwhile, contact short circuit is avoided, the thickness is relatively good, but the second adhesive layer 40 has certain penetration, and the leakage part is required to be reduced as much as possible.
The thickness d5 of the second stainless steel layer 50 is 0.1mm-5mm, and is used for electrically communicating with the other electrode of the battery cell inside the battery shell and preventing moisture outside the battery shell from permeating into the shell; by way of specific illustration, d5 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 d5 of 0.1mm to 0.25mm for small button cells and a preferred choice of thickness d5 of 1mm to 3mm for power cells, battery cells and the like to ensure safety.
The melting temperature of the first bonding layer 20 is lower than that of the conduction-preventing layer 30, and the melting temperature of the second bonding layer 40 is lower than that of the conduction-preventing layer 30; before the battery shell is sealed, the first adhesive layer 20 and the second adhesive layer 40 are respectively seamlessly adhered to the first stainless steel layer 10 and the second stainless steel layer 50 at the temperature of more than or equal to 100 ℃ and less than the melting temperature of the conduction-preventing layer 30, the adhesion strength between the first adhesive layer 20 and the second stainless steel layer 50 is more than or equal to 1.0N per square millimeter at the normal cooling temperature, the temperature is more than or equal to 100 ℃, firstly, the moisture and 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 the temperature of melting the first adhesive layer 20 and the second adhesive layer 40, and the adhesion strength between the first adhesive layer 20 and the second adhesive layer 40 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 50 are provided as stainless steel plates, and the first adhesive layer 20, the conduction preventing layer 30, and the second adhesive layer 40 form an interlayer between the first stainless steel layer 10 and the second stainless steel layer 50. The specific material of the conduction preventing layer 30 is not limited, and only the requirement of having insulating property, such as rubber, is satisfied. Specific materials of the first adhesive layer 20 and the second adhesive layer 40 are not limited, and it is sufficient that the first stainless steel layer 10 and the second stainless steel layer 50 can be adhered to the conduction preventing layer 30 while corrosion of the electrolyte can be prevented.
For example, the first adhesive layer 20, the second adhesive layer 40 and the conduction preventing 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 raw material of the first adhesive layer 20 is melted at a melting temperature, for example, 100 c, to be flow-adhered to the first stainless steel layer 10 and the conduction preventing layer 30. The melting temperature of the first bonding layer 20 is lower than that of the conduction-preventing layer 30, so that the conduction-preventing layer 30 and the first bonding layer 20 can be prevented from melting at the same temperature and then mutually melting, and therefore the performance of the conduction-preventing layer 30 can not be damaged in the process of connecting the conduction-preventing layer 30 and the first stainless steel layer 10. The function and melting temperature of the second adhesive layer 40 may be referred to the first adhesive layer 20.
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. Wherein, first stainless steel layer 10 can form the positive pole shell, and second stainless steel layer 50 can form the negative pole shell, and the positive pole shell is connected with the positive pole 60 of electric core, and the negative pole shell is connected with the negative pole 70 of electric core, realizes insulating and sealing connection through first adhesive linkage 20, second adhesive linkage 40 and conduction-proof layer 30 between positive pole shell and the negative pole shell to both can prevent that the electrolyte from revealing, can prevent again that outside moisture from oozing into inside the battery case.
Compared with the existing battery shell, the first bonding layer 20, the second bonding layer 40 and the conduction preventing layer 30 have corrosion resistance so as to avoid being damaged by electrolyte corrosion, and as the first bonding layer 20 and the second bonding layer 40 are seamlessly bonded with the first stainless steel layer 10 and the second stainless steel layer 20 and are made before the battery shell is packaged, the production and the processing are convenient, meanwhile, the tightness of the battery shell is improved, and meanwhile, when the insulating layer exceeds the bonding strength, the insulating layer can be cracked, the battery can be protected, and the phenomenon that a large amount of gas is exploded inside the battery due to some conditions is avoided.
The thickness d1 of the first stainless steel layer 10 and the thickness d5 of the second stainless steel layer 50 are set to 0.1mm to 5mm, so that the first stainless steel layer 10 and the second stainless steel layer 50 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 first adhesive layer 20 and the thickness d4 of the second adhesive layer 40 are set to be 0.05mm-10mm, so that the first adhesive layer 20 and the second adhesive layer 40 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 first adhesive layer 20 and the second adhesive layer 40 is improved, and the overall size of a battery shell made of the stainless steel composite plate can be reasonably controlled. The thickness d3 of the conduction preventing layer 30 is set to be 0.05mm-5mm, so that the conduction preventing layer 30 can be prevented from being extruded and damaged in the subsequent processing process or the use process of the battery, and the insulation stability is improved; and simultaneously, the overall size of the battery shell made of the stainless steel composite plate can be reasonably controlled.
The bonding strength between the first bonding layer 20 and the second bonding layer 40 and between the first stainless steel layer 10 and the second stainless steel layer 50 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 and the second stainless steel layer 50 can be prevented from easily falling off from the first bonding layer 20 and the second bonding layer 40 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 can be ensured. Specifically, the first adhesive layer 20 and the second adhesive layer 40 respectively have an adhesive strength of 5.0N/mm or less with the first stainless steel layer 10 and the second stainless steel layer 50 at a cooling normal temperature, 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 50 from being damaged by internal 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 50 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. Setting the first stainless steel layer 10 and the second stainless steel layer 50 as SUS304 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 50 before being processed into the battery shell, after the first stainless steel layer 10 and the second stainless steel layer 50 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 utility model, the first stainless steel layer 10 is fixedly connected to one side of the conduction preventing layer 30 through the first bonding layer 20, and the second stainless steel layer 50 is fixedly connected to the other side of the conduction preventing layer 30 through the second bonding layer 40, so that the first stainless steel layer 10 and the second stainless steel layer 50 can be connected and insulated from each other; after the stainless steel composite board is manufactured, the first stainless steel layer 10 and the second stainless steel layer 50 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 50 can form a cathode shell, the anode shell and the cathode shell can be hermetically and insulatively connected through the first bonding layer 20, the conduction preventing layer 30 and the second bonding layer 40, therefore, the processing difficulty of the battery shell is reduced, and the processing efficiency of the battery is improved.
In an embodiment, the first adhesive layer 20 and the second adhesive layer 40 are melted at 350 ℃ or lower to be seamlessly adhered to the first stainless steel layer 10 and the second stainless steel layer 50, respectively. That is, the first adhesive layer 20 and the second adhesive layer 40 are melted at 100 ℃ to 350 ℃ and are seamlessly adhered to the first stainless steel layer 10 and the second stainless steel layer 50, so that the first adhesive layer 20 and the second adhesive layer 40 are sufficiently melted to be sufficiently contacted with the first stainless steel layer 10 and the second stainless steel layer 50, and the adhesive strength of the first adhesive layer 20 and the second adhesive layer 40 is ensured; the specific temperature may be, for example, 100 ℃, 105 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 180 ℃, 200 ℃, 250 ℃, 500 ℃, 600 ℃, 700 ℃, 800 ℃, 850 ℃, and is not limited, and the first adhesive layer 20 and the second adhesive layer 40 are melted and the seamless bonding between the first adhesive layer 20 and the second adhesive layer 40 and the first stainless steel layer 10 and the second stainless steel layer 20 is realized within a temperature range in which the material properties are not damaged while the first adhesive layer 20 and the second adhesive layer 40 are melted.
In an embodiment, as shown in fig. 3 to 5, a first adhesion enhancement layer 11 is disposed on the first stainless steel layer 10 near the first surface layer of the first adhesion layer 20, for enhancing the adhesion strength with the first adhesion layer 20; and/or a second adhesion enhancement layer 51 is arranged on a second surface layer of the second stainless steel layer 50 close to the second adhesion layer 40, and is used for enhancing the adhesion strength between the second adhesion layer 40 and the second adhesion layer. The specific form of the first adhesion enhancement layer 11 and the second adhesion enhancement layer 51 is not limited, and it is sufficient to increase the connection area with the first adhesion layer 20 and the second adhesion layer 40 to enhance the adhesion strength. For example, the first adhesion enhancing layer 11 and the second adhesion enhancing layer 51 may be provided as protrusions. The first and second adhesion enhancing layers 11, 51 may be of the same or different form. It should be noted that the first adhesion enhancement layer 11 and the second adhesion enhancement layer 51 should not penetrate through the first adhesion layer 20 and the second adhesion layer 40, so as to avoid affecting the connection stability of the first adhesion layer 20 and the conduction preventing layer 30 and the connection stability of the second adhesion layer 40 and the conduction preventing 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 first adhesion layer 20 by sand blasting; and/or the second adhesion enhancement layer 51 is a second surface layer of the second stainless steel layer 50 close to the second adhesion layer 40, which is processed by sand blasting to form a uniform second rough surface layer. The sand blasting is to form a high-speed spray beam by using compressed air as power to spray materials (copper ore sand, quartz sand, carborundum, iron sand and Hainan sand) to the surface of a workpiece to be treated at a high speed, so that the appearance or the shape of the outer surface of the workpiece is changed, and the surface of the workpiece obtains certain cleanliness and different roughness due to the impact and the cutting action of an abrasive on the surface of the workpiece. It is understood that the term "uniform" in this embodiment does not mean absolute uniformity, but rather a natural roughness formed by sand blasting the first and second surface layers. The first rough surface layer and the second rough surface layer can increase the adhesive force with the first adhesive layer 20 and the second adhesive layer 40; and the adhesive force between each part of the first surface layer and the second surface layer and between each part of the first adhesive layer 20 and the second adhesive layer 40 are more uniform, so that stress concentration is avoided. The first and second adhesion reinforcing layers 11 and 51 are formed by sand blasting, so that the processing manner of the first and second adhesion reinforcing layers 11 and 51 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 first adhesive layer 20, the second adhesion enhancing layer 51 is a second inclined plate 511 protruding from the second surface layer and having a certain inclination angle with the second surface layer, and a height h2 of the second inclined plate 511 is smaller than a thickness d4 of the second adhesive layer 40. The number of the first inclined pieces 111 is multiple and distributed on the first surface layer, and the melted first adhesive layer 20 may fill a space between two adjacent first inclined pieces 111 to be adhesively connected to 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 height of the first adhesive layer 20, so that the first inclined plate 111 can be prevented from penetrating through the first adhesive layer 20. The number of the second inclined pieces 511 is plural and is distributed on the second surface layer, and the melted second adhesive layer 40 may fill a space between two adjacent second inclined pieces 511 to be adhered and connected with the side surface of each second inclined piece 511. The height of the second inclined plate 511, that is, the vertical distance between the end of the second inclined plate 511 and the second surface layer, and the height of the second inclined plate 511 is smaller than the height of the second adhesive layer 40, so that the second inclined plate 511 can be prevented from passing through the second adhesive layer 40.
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 first adhesion layer 20; and/or the second adhesion enhancement layer 51 is a second groove 512 for recessing the second surface layer, and the recessing direction of the second groove 512 is far away from the direction of the second adhesion layer 40. The number of the first grooves 112 is plural, the plural first grooves 112 are distributed on the first surface layer, and the melted first adhesive layer 20 can be filled in the first grooves 112 to increase the connection area with the first surface layer, thereby enhancing the adhesive strength between the first stainless steel layer 10 and the first adhesive layer 20. The number of the second grooves 512 is plural, the plural second grooves 512 are distributed on the second surface layer, and the melted second adhesive layer 40 can be filled in the second grooves 512 to increase the connection area with the second surface layer, thereby enhancing the adhesive strength of the second stainless steel layer 50 and the second adhesive layer 40.
As shown in fig. 6, the utility model discloses still provide a battery, this battery includes battery case, and this battery case is a stainless steel composite sheet at least partially, and above-mentioned embodiment is referred to this stainless steel composite sheet's concrete structure, because this battery has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not repeated here one by one again. Wherein the battery cell has at least a positive electrode 60, a negative electrode 70, and an electrolyte within the cell casing, the positive electrode 60 being in electrical communication with the first stainless steel layer 10, and the negative electrode 70 being in electrical communication with the second stainless steel layer 50. It is understood that the first stainless steel layer 10 and the second stainless steel layer 50 may be formed into a battery case by bending, or may be formed into a battery case by connecting stainless steel plates.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection 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, a first bonding layer, a conduction preventing layer, a second bonding layer and a second stainless steel layer;
the first stainless steel layer is used for being electrically communicated with one electrode of the battery core in the battery shell and preventing moisture outside the battery shell from permeating into the shell;
the first bonding layer is used for bonding the first stainless steel layer and the conduction preventing layer, is resistant to electrolyte corrosion and prevents moisture outside the battery shell from permeating into the shell;
the conduction preventing layer is used for preventing the first stainless steel layer and the second stainless steel layer from being conducted electrically, resisting electrolyte corrosion and preventing moisture outside the battery shell from permeating into the shell;
the second bonding layer is used for bonding the second stainless steel layer and the conduction preventing layer, is resistant to electrolyte corrosion and prevents moisture outside the battery shell from permeating into the shell;
the second stainless steel layer is used for being electrically communicated with the other electrode of the battery core in the battery shell and preventing moisture outside the battery shell from permeating into the shell;
the melting temperature of the first bonding layer is lower than that of the conduction-proof layer, and the melting temperature of the second bonding layer is lower than that of the conduction-proof layer;
before the battery shell is sealed, the first bonding layer and the second bonding layer are seamlessly bonded with the first stainless steel layer and the second stainless steel layer respectively at a melting temperature.
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 first adhesive layer, the conduction preventing layer and the second adhesive layer are made of one or more of PP, PFA, PVDF, PTFE, ETFE and PVC.
4. The stainless steel composite plate according to claim 1, wherein the bonding strength between the first bonding layer and the second bonding layer and the bonding strength between the first stainless steel layer and the second stainless steel layer at normal cooling temperature are respectively greater than or equal to 1.0N per square millimeter and less than or equal to 5.0N per square millimeter.
5. The stainless steel composite plate according to claim 1, wherein the first adhesive layer and the second adhesive layer are melted at 100 ℃ or higher and 350 ℃ or lower to be seamlessly adhered to the first stainless steel layer and the second stainless steel layer, respectively.
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 a first surface layer of the first adhesion layer for enhancing adhesion strength with the first adhesion layer; and/or a second bonding enhancement layer is arranged on a second surface layer, close to the second bonding layer, of the second stainless steel layer and used for enhancing the bonding strength between the second bonding layer and the second stainless steel 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 first adhesion 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 second bonding layer and is processed by sand blasting to form a uniform second rough surface layer.
8. The stainless steel composite panel of claim 6, wherein the first adhesion enhancing layer is a first slanted piece protruding from the first skin layer and having a certain slant angle with respect to the first skin layer, a height h1 of the first slanted piece being smaller than a thickness d2 of the first adhesion layer, the second adhesion enhancing layer is a second slanted piece protruding from the second skin layer and having a certain slant angle with respect to the second skin layer, a height h2 of the second slanted piece being smaller than a thickness d4 of the second adhesion layer.
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 first 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 second 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 therein at least a cell element comprising a positive electrode, a negative electrode and an electrolyte, said positive electrode being in electrical communication with a first stainless steel layer of said stainless steel composite sheet and said negative electrode being in electrical communication with a second stainless steel layer of said stainless steel composite sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120932742.3U CN215070155U (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120932742.3U CN215070155U (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215070155U true CN215070155U (en) | 2021-12-07 |
Family
ID=79108309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120932742.3U Active CN215070155U (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215070155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131050A (en) * | 2021-04-30 | 2021-07-16 | 国研新能(深圳)技术有限公司 | Stainless steel composite plate and battery |
-
2021
- 2021-04-30 CN CN202120932742.3U patent/CN215070155U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113131050A (en) * | 2021-04-30 | 2021-07-16 | 国研新能(深圳)技术有限公司 | Stainless steel composite plate and battery |
| CN113131050B (en) * | 2021-04-30 | 2024-10-11 | 国研新能(深圳)技术有限公司 | Stainless steel composite board and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20030228515A1 (en) | Electrochemical element | |
| WO2022227650A1 (en) | Battery housing and battery | |
| US20120156542A1 (en) | Battery cell having a jacket | |
| WO2022227649A1 (en) | Battery housing and battery | |
| CN215070155U (en) | Stainless steel composite plate and battery | |
| KR101924428B1 (en) | metal tab | |
| CN215070154U (en) | Stainless steel composite plate and battery | |
| CN113131050A (en) | Stainless steel composite plate and battery | |
| CN113161653B (en) | Stainless steel composite board and battery | |
| WO2022227651A1 (en) | Battery case and battery | |
| US20170125837A1 (en) | Battery structure | |
| CN115911686A (en) | Electrochemical storage metal housing and battery | |
| CN216311912U (en) | Battery case and battery | |
| CN215578756U (en) | Battery case and battery | |
| US20230015007A1 (en) | Battery and method of manufacturing battery | |
| CN215527815U (en) | Battery case and battery | |
| EP4201651A1 (en) | Apparatus for sealing battery case, and secondary battery manufactured using same | |
| CN209963173U (en) | All-solid-state battery cell, laminated battery cell and composite battery cell | |
| CN210167266U (en) | Conductive composite electrode material of all-solid-state supercapacitor | |
| KR102143626B1 (en) | Secondary | |
| CN216450682U (en) | Lithium ion battery pole piece | |
| CN216958248U (en) | Electricity core apron | |
| EP4343932A1 (en) | Pouch film laminate and secondary battery | |
| KR20240122331A (en) | Pouch film and secondary battery | |
| KR101739516B1 (en) | Flexible rechargeable battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |