CN116487787A - Composite top cover plate, battery and top cover plate manufacturing method - Google Patents
Composite top cover plate, battery and top cover plate manufacturing method Download PDFInfo
- Publication number
- CN116487787A CN116487787A CN202310517522.8A CN202310517522A CN116487787A CN 116487787 A CN116487787 A CN 116487787A CN 202310517522 A CN202310517522 A CN 202310517522A CN 116487787 A CN116487787 A CN 116487787A
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- substrate
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- proof
- electrode substrate
- negative electrode
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- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 231
- 229910000838 Al alloy Inorganic materials 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 239000006104 solid solution Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims 2
- 230000002829 reductive effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 8
- 238000004080 punching Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- 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
Abstract
The invention relates to the technical field of battery production, and particularly discloses a composite top cover plate, a battery and a top cover plate manufacturing method, wherein the composite top cover plate comprises a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve and a negative electrode substrate for mounting a negative electrode post; the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate are sequentially connected, and the structural strength of the positive electrode substrate and the structural strength of the negative electrode substrate are smaller than those of the explosion-proof substrate. The composite top cover plate, the battery and the top cover plate manufacturing method provided by the invention can effectively solve the problem that deformation is easily caused by insufficient strength of the valve hole position in the existing top cover plate.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a composite top cover plate, a battery and a top cover plate manufacturing method.
Background
In general, a top cover plate in a battery case is provided with a positive electrode column hole for mounting a positive electrode column, a negative electrode column hole for mounting a negative electrode column, and a valve hole for mounting an explosion-proof valve.
In recent years, in order to increase the energy density of the battery, the thickness dimension of the top cover plate is reduced, but in order to secure safety, the size of the explosion-proof valve is not reduced. The position that valve opening both sides are used for providing intensity support is very narrow originally, and after the thickness size of lamina tecti was thinned, the valve opening both sides are used for providing intensity support's position intensity is not enough, takes place to warp easily at subsequent course of working, influences lamina tecti's planarization, still can further lead to follow-up welding to appear bad etc..
Therefore, improvements to the existing top cover plate are needed to solve the problem that the deformation is easily caused by insufficient strength of the valve hole position.
The above information disclosed in this background section is only included to enhance understanding of the background of the disclosure and therefore may contain information that does not form the prior art that is presently known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present invention is to provide a composite top cover plate, a battery, and a top cover plate manufacturing method, which can effectively solve the problem that the existing top cover plate is easy to deform due to insufficient strength of the valve hole.
In order to achieve the above object, the present invention provides a composite top cover plate, comprising a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve, and a negative electrode substrate for mounting a negative electrode post;
the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate are sequentially connected, and the structural strength of the positive electrode substrate and the structural strength of the negative electrode substrate are smaller than those of the explosion-proof substrate.
Optionally, the positive electrode substrate and the negative electrode substrate are both made of three-series aluminum alloy, and the explosion-proof substrate is made of heat-treated six-series aluminum alloy.
Optionally, the positive electrode substrate and the explosion-proof substrate, and the negative electrode substrate and the explosion-proof substrate are all welded.
Optionally, a valve hole for accommodating the explosion-proof valve is formed in the explosion-proof substrate.
On the other hand, a battery is provided, which comprises a shell provided with a containing cavity, an electric core positioned in the containing cavity and any composite top cover plate positioned at the opening of the containing cavity.
In yet another aspect, a method for manufacturing a top cover plate is provided, comprising:
respectively manufacturing a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve and a negative electrode substrate for mounting a negative electrode post; wherein, the structural strength of the positive electrode substrate and the negative electrode substrate is smaller than that of the explosion-proof substrate;
and sequentially connecting the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate to obtain the composite top cover plate.
Optionally, the step of manufacturing the positive electrode substrate for mounting the positive electrode post, the explosion-proof substrate for mounting the explosion-proof valve, and the negative electrode substrate for mounting the negative electrode post, respectively, includes:
stamping the first plate to obtain the positive electrode substrate and/or the negative electrode substrate;
and stamping on the second plate to obtain the explosion-proof substrate.
Optionally, after the step of stamping the explosion-proof substrate on the second plate, the method further includes:
and carrying out heat treatment on the explosion-proof substrate to improve the structural strength of the explosion-proof substrate.
Optionally, the step of "performing heat treatment on the explosion-proof substrate" includes:
carrying out solid solution treatment at 500-550 ℃;
preserving heat for 2-5 h;
taking out and carrying out water quenching;
preserving heat for 1-6 h at 175-220 ℃.
Optionally, the step of "sequentially connecting the positive electrode substrate, the explosion-proof substrate, and the negative electrode substrate" includes:
friction welding is carried out on the positive electrode substrate and the explosion-proof substrate;
friction welding is carried out on the negative electrode substrate and the explosion-proof substrate.
The invention has the beneficial effects that: the explosion-proof base plate with the valve hole is manufactured by using materials with higher structural strength, and then the explosion-proof base plate is respectively connected with the positive base plate and the negative base plate, so that the structural strength of the position of the valve hole is improved, and the deformation condition of the position of the valve hole due to insufficient structural strength is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic view of the structure of a battery provided in embodiment 1;
FIG. 2 is a composite top cover plate provided in examples 2 and 3;
FIG. 3 is a flow chart of a method for manufacturing a top cover plate according to example 4;
fig. 4 is a flowchart of a top cover plate manufacturing method provided in embodiment 5.
In the figure:
1. a housing; 101. a receiving chamber;
2. a battery cell;
3. a top cover assembly;
301. a composite top cover plate; 3011. a positive electrode substrate; 3011a, positive post holes; 3012. an explosion-proof substrate; 3012a, valve orifice; 3013. a negative electrode substrate; 3013a, a negative electrode post hole;
302. a positive electrode post;
303. a negative electrode post;
304. an explosion-proof valve.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of 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 apparent that the embodiments described below are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it will be understood that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Furthermore, the terms "long," "short," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description of the present invention, and are not intended to indicate or imply that the apparatus or elements referred to must have this particular orientation, operate in a particular orientation configuration, and thus should not be construed as limiting the invention.
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
The invention provides a composite top cover plate, a battery with the composite top cover plate and a top cover plate manufacturing method for preparing the composite top cover plate. It should be noted that, the battery of the present invention may be a cylindrical battery, a prismatic battery, etc., and for convenience of explanation, the following description will mainly take the prismatic battery as an example.
The composite top cover sheet, the battery, and the top cover sheet manufacturing method of the present invention will be described below with reference to the drawings, as in examples 1 to 5.
Example 1
As shown in fig. 1, the battery provided in embodiment 1 of the present invention is described.
In this embodiment, the battery includes a case 1, a battery cell 2, and a top cap assembly 3. The battery cell module comprises a shell 1, a battery cell 2 and a top cover assembly, wherein the shell 1 is provided with a containing cavity 101 with an upward opening, the battery cell 2 is located in the containing cavity 101, and the top cover assembly 3 is located at the top of the shell 1 and used for sealing the opening of the containing cavity 101.
Further, the top cover assembly 3 includes a composite top cover plate 301 for covering the opening of the accommodating cavity 101, and the positive electrode post 302, the negative electrode post 303 and the explosion-proof valve 304 are mounted on the composite top cover plate 301.
Specifically, the composite top cover 301 includes a positive substrate 3011, an explosion-proof substrate 3012, and a negative substrate 3013, and specific structures such as connection relationships of the positive substrate 3011, the explosion-proof substrate 3012, and the negative substrate 3013 are further described in embodiment 2 or embodiment 3, and the battery provided in this embodiment has the same beneficial effects as the composite top cover 301 when the composite top cover 301 is used.
Example 2
Referring to fig. 2, the present embodiment provides a composite top cover plate 301, which can be used for the battery in embodiment 1, and includes a positive electrode substrate 3011, an explosion-proof substrate 3012, and a negative electrode substrate 3013, which are sequentially connected in a line. Further, the positive electrode substrate 3011 is provided with a positive electrode post hole 3011a for mounting the positive electrode post 302, the explosion-proof substrate 3012 is provided with a valve hole 3012a for mounting the explosion-proof valve 304, and the negative electrode substrate 3013 is provided with a negative electrode post hole 3013a for mounting the negative electrode post 303. Optionally, a liquid injection hole is further formed on the positive substrate 3011 or the negative substrate 3013.
In this embodiment, the material of the explosion-proof substrate 3012 is different from the material of the positive electrode substrate 3011 and the negative electrode substrate 3013, and further, the structural strength of both the positive electrode substrate 3011 and the negative electrode substrate 3013 is smaller than the structural strength of the explosion-proof substrate 3012. For example, the positive electrode substrate 3011 and the negative electrode substrate 3013 are made of aluminum alloy, and the explosion-proof substrate 3012 is made of zinc alloy or magnesium alloy; alternatively, the positive electrode substrate 3011 and the negative electrode substrate 3013 are made of an aluminum alloy having low structural strength, and the explosion-proof substrate 3012 is made of an aluminum alloy having high structural strength.
Alternatively, the structural strength may be evaluated by one or more of tensile strength, compressive strength, shear strength, flexural strength, and the like, which is not limited by the present invention.
Since the size of the positive electrode post holes 3011a and the negative electrode post holes 3013a is small, the thickness of the composite top cover plate 301 is reduced, and therefore, even if the positive electrode substrate 3011 and the negative electrode substrate 3013 are prepared using the original materials, the positive electrode substrate 3011 and the negative electrode substrate 3013 can still have sufficient structural strength. The size of the valve hole 3012a is relatively large, and after the thickness of the composite top cover plate 301 is reduced, if the original material is still used to prepare the explosion-proof substrate 3012, the position of the valve hole 3012a is easy to deform due to insufficient strength, so that the explosion-proof substrate 3012 is prepared by using a material with higher structural strength in the embodiment, so that the structural strength of the explosion-proof substrate 3012 is improved, and the occurrence of adverse conditions caused by deformation is reduced.
In this embodiment, the positive electrode substrate 3011 and the explosion-proof substrate 3012, and the negative electrode substrate 3013 and the explosion-proof substrate 3012 are welded together, so as to achieve a reliable fastening effect. Alternatively, the welded connection may be friction stir welding, laser welding, resistance welding, etc., which is not limited in the present invention.
In summary, compared with the prior art, the embodiment has the following beneficial effects: the explosion-proof substrate 3012 with the valve hole 3012a is made of a material with higher structural strength, and then the explosion-proof substrate 3012 is respectively connected with the positive substrate 3011 and the negative substrate 3013, so that the structural strength of the position of the valve hole 3012a is improved, and the deformation condition of the position of the valve hole 3012a due to insufficient structural strength is reduced.
Example 3
This embodiment provides a composite top cover plate 301 that can be used for the battery of embodiment 1, and differs from embodiment 2 in that:
before the explosion-proof substrate 3012 is subjected to heat treatment, the structural strength of the explosion-proof substrate 3012 is lower, and the structural strength of the explosion-proof substrate 3012 is similar to that of the positive electrode substrate 3011 and the negative electrode substrate 3013; after the explosion-proof substrate 3012 is heat-treated, the structural strength of the explosion-proof substrate 3012 is far higher than that of both the positive electrode substrate 3011 and the negative electrode substrate 3013.
In general, the explosion-proof substrate 3012, the positive electrode substrate 3011, and the negative electrode substrate 3013 are all manufactured by a press process, and the higher the structural strength of the three, the more serious the abrasion to the punch during press. In this embodiment, in the beginning, the structural strength of the explosion-proof substrate 3012 is made to be similar to that of both the positive electrode substrate 3011 and the negative electrode substrate 3013, and at this time, the stamping is performed, so that the problem of excessive wear of the punch due to excessive structural strength of the explosion-proof substrate 3012 can be avoided. After the stamping is completed, the explosion-proof substrate 3012 is subjected to heat treatment, so that the structural strength of the explosion-proof substrate 3012 can be increased to a higher level, and the effect of inhibiting deformation of the position of the valve hole 3012a is achieved.
Optionally, the positive substrate 3011 and the negative substrate 3013 are all three-series aluminum alloys, such as 3030-H14 aluminum alloy; the explosion-proof substrate 3012 is a heat-treated six-system aluminum alloy, for example, 6061-O-state aluminum alloy.
Before heat treatment, the tensile strength of the 6061-O aluminum alloy is 110 MPa-130 MPa, which is similar to that of the 3030-H14 aluminum alloy, and at the moment, the 6061-O aluminum alloy is punched, so that the punch abrasion is not serious; after the explosion-proof substrate 3012 obtained by stamping is subjected to heat treatment, the tensile strength of the explosion-proof substrate 3012 can reach 250 MPa-320 MPa, and is far higher than 3030-H14 aluminum alloy. Therefore, when the explosion-proof substrate 3012 is a heat-treated six-system aluminum alloy, not only the structural strength of the explosion-proof substrate 3012 can be effectively improved, but also the abrasion degree of the punch can be effectively reduced, and the service life of the punch can be further prolonged.
In summary, compared with embodiment 2, the present embodiment has the following advantages: the structural strength of the explosion-proof substrate 3012 before heat treatment is low, so that the abrasion degree of a punch in the punching process is effectively reduced, the structural strength of the explosion-proof substrate 3012 after heat treatment is high, and the structural strength of the position of the valve hole 3012a is effectively improved; that is, the influence on the service life of the pressing machine can be reduced while preventing deformation due to insufficient strength of the position of the valve hole 3012 a.
Example 4
The embodiment provides a top cover plate manufacturing method for manufacturing the composite top cover plate provided in embodiment 2, which has the same beneficial effects as embodiment 2.
As shown in fig. 3, the manufacturing method of the top cover plate provided in this embodiment includes the following steps:
s101: respectively manufacturing a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve and a negative electrode substrate for mounting a negative electrode post; wherein, the structural strength of both the positive electrode substrate and the negative electrode substrate is smaller than that of the explosion-proof substrate.
The material of the explosion-proof substrate is different from that of the positive electrode substrate and/or the negative electrode substrate, so that the explosion-proof substrate needs to be manufactured independently, and the material of the positive electrode substrate and the negative electrode substrate can be the same, so that the positive electrode substrate and the negative electrode substrate can be manufactured separately or independently. Specifically:
s1011: providing a first plate and a second plate, wherein the structural strength of the first plate is smaller than that of the second plate;
optionally, the specification size of the first plate and the second plate may be one of the following sizes: (1) width 30mm, thickness 0.5mm; (2) 300mm in width and 2mm in thickness; (3) 150mm in width and 1mm in thickness. Alternatively, in some other embodiments, the first and second sheets may be of other gauge sizes.
S1012: and stamping the first plate to obtain the positive electrode substrate and/or the negative electrode substrate, and stamping the second plate to obtain the explosion-proof substrate.
The positive electrode substrate and the negative electrode substrate are made of the same material, so that the positive electrode substrate and the negative electrode substrate can be punched on the same plate at the same time. Of course, one of the positive electrode substrate and the negative electrode substrate may be punched first, and the other may be punched, which is not limited in this embodiment.
The positive electrode post hole and the negative electrode post hole are also manufactured by using a stamping process, so that the positive electrode post hole and the negative electrode post hole can be formed by stamping at the same time when the positive electrode substrate and the negative electrode substrate are manufactured by stamping on the first plate; similarly, when the explosion-proof substrate is formed by punching the second plate, the valve hole can be punched on the explosion-proof substrate at the same time.
S102: and sequentially connecting the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate to obtain the composite top cover plate.
In this embodiment, friction welding is performed on the positive electrode substrate and the explosion-proof substrate, and friction welding is performed on the negative electrode substrate and the explosion-proof substrate, so that the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate can be sequentially connected to form a composite top cover plate.
According to the manufacturing method of the top cover plate, the first plate with lower structural strength is used for manufacturing the positive electrode substrate and/or the negative electrode substrate, the second plate with higher structural strength is used for manufacturing the explosion-proof substrate, and then the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate are sequentially welded and connected to form the composite top cover plate, so that the explosion-proof substrate has higher structural strength, and the problem that the position of the valve hole is easy to deform due to insufficient strength is solved.
Example 5
The present embodiment provides a method for manufacturing a top cover plate, which is used for manufacturing the composite top cover plate provided in embodiment 3, and has the same beneficial effects as embodiment 3.
As shown in fig. 4, the method for manufacturing a top cover plate provided in this embodiment includes the following steps:
s201: respectively manufacturing a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve and a negative electrode substrate for mounting a negative electrode post;
specifically, step S201 includes:
s2011: providing a first plate and a second plate, wherein the structural strength of the first plate is similar to that of the second plate;
for example, the first plate is a three-series aluminum alloy, and further, a 3030-H14 aluminum alloy; the second plate is a six-system aluminum alloy which is not subjected to heat treatment, and further is 6061-O-state aluminum alloy. Before the second plate is heat treated, the tensile strength is 110 MPa-130 MPa, which is similar to that of the first plate.
S2012: and stamping the first plate to obtain the positive electrode substrate and/or the negative electrode substrate, and stamping the second plate to obtain the explosion-proof substrate.
Because the structural strength of the first plate and the structural strength of the second plate are similar, the abrasion degree of the punch for punching the first plate and the abrasion degree of the punch for punching the second plate are similar.
In the same manner as in example 4, when the positive electrode substrate and the negative electrode substrate are prepared by punching on the first plate, the positive electrode post hole and the negative electrode post hole may be simultaneously punched; when the explosion-proof substrate is formed by punching the second plate, the valve hole can be punched on the explosion-proof substrate at the same time.
S2013: and carrying out heat treatment on the explosion-proof substrate to improve the structural strength of the explosion-proof substrate.
Specifically, the heat treatment includes the steps of:
(1) Carrying out solid solution treatment at 500-550 ℃;
(2) Preserving heat for 2-5 h;
(3) Taking out and carrying out water quenching;
(4) Preserving heat for 1-6 h at 175-220 ℃.
After the heat treatment, the structural strength of the explosion-proof substrate can be greatly increased, specifically, taking 6061-O aluminum alloy as an example, the tensile strength of the explosion-proof substrate after the heat treatment can reach 250 MPa-320 MPa, and is far higher than that of a positive electrode substrate or a negative electrode substrate made of 3030-H14 aluminum alloy, so that the abrasion degree of a punch can be effectively reduced by punching and then performing the heat treatment.
S202: and sequentially connecting the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate to obtain the composite top cover plate.
In summary, compared with embodiment 4, the present embodiment has the following advantages: the explosion-proof substrate with the valve hole and the preset shape is manufactured through a stamping process, and the structural strength of the explosion-proof substrate is improved through a heat treatment mode, so that the abrasion degree of the punch in the stamping process can be reduced and the service life of the punch is prolonged while the structural strength of the valve hole is improved.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. The composite top cover plate is characterized by comprising a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve and a negative electrode substrate for mounting a negative electrode post;
the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate are sequentially connected, and the structural strength of the positive electrode substrate and the structural strength of the negative electrode substrate are smaller than those of the explosion-proof substrate.
2. The method of manufacturing a roof panel according to claim 1, wherein the positive electrode substrate and the negative electrode substrate are both made of a three-system aluminum alloy, and the explosion-proof substrate is a heat-treated six-system aluminum alloy.
3. The composite roof panel of claim 1 or 2, wherein the positive substrate and the explosion-proof substrate, and the negative substrate and the explosion-proof substrate are all welded together.
4. The composite roof panel of claim 1, wherein the explosion proof substrate has a valve opening therein for receiving the explosion proof valve.
5. A battery comprising a housing provided with a receiving cavity, a cell positioned in the receiving cavity, and a composite top cover plate according to any one of claims 1 to 4 positioned at an opening of the receiving cavity.
6. A method of manufacturing a roof panel, comprising:
respectively manufacturing a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve and a negative electrode substrate for mounting a negative electrode post; wherein, the structural strength of the positive electrode substrate and the negative electrode substrate is smaller than that of the explosion-proof substrate;
and sequentially connecting the positive electrode substrate, the explosion-proof substrate and the negative electrode substrate to obtain the composite top cover plate.
7. The method of manufacturing a top cover plate according to claim 6, wherein the steps of manufacturing a positive electrode substrate for mounting a positive electrode post, an explosion-proof substrate for mounting an explosion-proof valve, and a negative electrode substrate for mounting a negative electrode post, respectively, include:
stamping the first plate to obtain the positive electrode substrate and/or the negative electrode substrate;
and stamping on the second plate to obtain the explosion-proof substrate.
8. The method of manufacturing a roof panel according to claim 7, further comprising, after the step of stamping the explosion-proof substrate from the second sheet material:
and carrying out heat treatment on the explosion-proof substrate to improve the structural strength of the explosion-proof substrate.
9. The method of manufacturing a roof panel according to claim 8, wherein the step of "heat treating the explosion-proof substrate" includes:
carrying out solid solution treatment at 500-550 ℃;
preserving heat for 2-5 h;
taking out and carrying out water quenching;
preserving heat for 1-6 h at 175-220 ℃.
10. The method of manufacturing a top cover sheet according to claim 6, wherein the step of connecting the positive electrode substrate, the explosion-proof substrate, and the negative electrode substrate in this order, comprises:
friction welding is carried out on the positive electrode substrate and the explosion-proof substrate;
friction welding is carried out on the negative electrode substrate and the explosion-proof substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310517522.8A CN116487787A (en) | 2023-05-09 | 2023-05-09 | Composite top cover plate, battery and top cover plate manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310517522.8A CN116487787A (en) | 2023-05-09 | 2023-05-09 | Composite top cover plate, battery and top cover plate manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116487787A true CN116487787A (en) | 2023-07-25 |
Family
ID=87213782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310517522.8A Pending CN116487787A (en) | 2023-05-09 | 2023-05-09 | Composite top cover plate, battery and top cover plate manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116487787A (en) |
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2023
- 2023-05-09 CN CN202310517522.8A patent/CN116487787A/en active Pending
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