CN215070154U - Stainless steel composite plate and battery - Google Patents
Stainless steel composite plate and battery Download PDFInfo
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- CN215070154U CN215070154U CN202120932737.2U CN202120932737U CN215070154U CN 215070154 U CN215070154 U CN 215070154U CN 202120932737 U CN202120932737 U CN 202120932737U CN 215070154 U CN215070154 U CN 215070154U
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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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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, an insulating 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 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 utility model discloses among the technical scheme, the back is made to the stainless steel composite sheet, can continue to process the shape that forms battery case with first stainless steel layer and second stainless steel layer, and wherein, first stainless steel layer can form anodal shell, and the second stainless steel layer can form negative pole shell, and anodal shell and the insulating adhesive linkage of negative pole shell accessible realize sealed and insulating the connection, from this, have reduced battery case's the processing degree of difficulty, have improved the machining efficiency to the battery.
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 purpose, the stainless steel composite board provided by the utility model at least comprises a first stainless steel layer, an insulating 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 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 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.
Optionally, the thickness d1 of the first stainless steel layer is 0.1mm-5 mm; and/or the thickness d3 of the second stainless steel layer is 0.1mm-5 mm.
Optionally, the thickness d2 of the insulating adhesive layer is 0.05mm-10 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 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 greater than or equal to 1.0N per square millimeter and less than or equal to 5.0N per square millimeter.
Optionally, the insulating bonding layer is melted at a temperature of greater than or equal to 100 ℃ and less than or equal to 850 ℃ 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 utility model 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 adhesive 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 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;
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.
The utility model discloses among the technical scheme, the back is made to the stainless steel composite sheet, can continue to process the shape that forms battery case with first stainless steel layer and second stainless steel layer, and wherein, first stainless steel layer can form anodal shell, and the second stainless steel layer can form negative pole shell, and anodal shell and the insulating adhesive linkage of negative pole shell accessible realize sealed and insulating the connection, from this, have reduced battery case's the processing degree of difficulty, have improved the machining efficiency to the battery.
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:
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 has a first stainless steel layer 10, an insulating adhesive layer 30, and a second stainless steel layer 20 in sequence; 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 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, in order to ensure the safety of power batteries, battery cars and the like, the preferable thickness d2 is 1mm-5mm, in order to ensure the firm adhesion between the first stainless steel layer and the second stainless steel layer, meanwhile, contact short circuit between the two layers is avoided, the thickness is relatively good, but the leakage part of the insulating bonding layer needs to be reduced as much as possible due to certain penetration of the insulating bonding layer.
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 utility model, melt insulating adhesive linkage 30 under more than or equal to 100 ℃ and carry out seamless bonding with first stainless steel layer 10, second stainless steel layer 20, the bonding strength adjustment of insulating adhesive linkage 30 and first stainless steel layer 10, second stainless steel layer 20 is more than or equal to 0.1N per square millimeter under will cooling normal atmospheric temperature, and set up the thickness of first stainless steel layer 10 and second stainless steel layer 20 to 0.1mm-5mm, and set up the thickness of insulating adhesive linkage 30 to 0.1mm-10mm, thereby both can guarantee first stainless steel layer 10 and second stainless steel layer 20 insulating connection, can guarantee the stability of stainless steel layer and insulating adhesive linkage 30 again; 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 first 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 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 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 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, an insulating 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 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 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.
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 of PP, PFA, PVDF, PTFE, ETFE and PVC.
4. The stainless steel composite plate of claim 1, wherein the bonding strength between the insulating bonding layer and the first stainless steel layer and the second stainless steel layer is 1.0N per square millimeter or more and 5.0N per square millimeter or less at a cold room temperature.
5. The stainless steel composite plate according to claim 1, wherein the insulating adhesive layer is melted at 100 ℃ or higher and 850 ℃ or lower to be 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120932737.2U CN215070154U (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite plate and battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120932737.2U CN215070154U (en) | 2021-04-30 | 2021-04-30 | Stainless steel composite plate and battery |
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| CN215070154U true CN215070154U (en) | 2021-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161653A (en) * | 2021-04-30 | 2021-07-23 | 国研新能(深圳)技术有限公司 | Stainless steel composite plate and battery |
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2021
- 2021-04-30 CN CN202120932737.2U patent/CN215070154U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161653A (en) * | 2021-04-30 | 2021-07-23 | 国研新能(深圳)技术有限公司 | Stainless steel composite plate and battery |
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