CN220121965U - Chemical energy storage battery and electronic product - Google Patents
Chemical energy storage battery and electronic product Download PDFInfo
- Publication number
- CN220121965U CN220121965U CN202222982039.0U CN202222982039U CN220121965U CN 220121965 U CN220121965 U CN 220121965U CN 202222982039 U CN202222982039 U CN 202222982039U CN 220121965 U CN220121965 U CN 220121965U
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- cover plate
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- plate layer
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- 238000004146 energy storage Methods 0.000 title claims abstract description 27
- 239000000126 substance Substances 0.000 title claims abstract description 27
- 239000010410 layer Substances 0.000 claims abstract description 158
- 239000012790 adhesive layer Substances 0.000 claims abstract description 51
- 239000002131 composite material Substances 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 210000000352 storage cell Anatomy 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 6
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 229910000619 316 stainless steel Inorganic materials 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 16
- 239000000428 dust Substances 0.000 description 11
- 239000003792 electrolyte Substances 0.000 description 8
- 238000004880 explosion Methods 0.000 description 7
- 238000003475 lamination Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model discloses a chemical energy storage battery and an electronic product, wherein the chemical energy storage battery comprises a cylindrical bottom shell, a composite cover plate and a composite body; the composite cover plate comprises an annular cover plate layer, an insulating adhesive layer and a circular cover plate layer, wherein the maximum diameter of the annular cover plate layer is larger than the maximum diameter of the outer side of the circular cover plate layer; the area of the insulating adhesive layer projected to the annular cover plate layer is 0.2-0.9 times of the area of the first side surface of the annular cover plate layer; the area of the insulating adhesive layer projected to the round cover plate layer accounts for 0.25-0.95 times of the area of the second side surface of the round cover plate layer; the cylindrical bottom shell comprises an annular side wall; the annular side wall is provided with an inner cutting supporting table and an outer sealing table; the width of the platform of the internally tangent supporting table accounts for one quarter to three quarters of the thickness of the annular side wall; the height of the outer sealing platform is 0.2 to 1.2 of the thickness of the annular cover plate layer, and the thickness of the outer sealing platform is 0.2 to 0.8 of the thickness of the annular cover plate layer; the annular cover plate layer merges with the outer sealing land to form a seal. The technical scheme of the utility model is beneficial to improving the safety performance of the chemical energy storage battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a chemical energy storage battery and an electronic product.
Background
In the existing button battery, a battery shell is formed by splicing a positive electrode shell and a negative electrode shell, and insulation is needed between the positive electrode shell and the negative electrode shell so as to avoid short circuit of the button battery. The related art realizes insulation by providing an insulation sleeve between the positive electrode case and the negative electrode case, and welds and fixes the positive electrode case and the negative electrode case. Therefore, the connection strength of the two is far greater than that of the battery anode casing or the battery cathode casing. When the battery is short-circuited or the battery is in fault, a large amount of gas is generated in the battery, and the gas does not have a proper drainage way, so that the battery bursts when the gas pressure reaches a certain value, thereby causing accidents.
Disclosure of Invention
The utility model mainly aims to provide a chemical energy storage battery and an electronic product, and aims to solve the problem of how to improve the safety of the battery.
A chemical energy storage battery comprising a cylindrical bottom shell enclosing with a composite cover plate forming an interior space, a composite body arranged in the interior space and comprising at least one positive electrode and at least one negative electrode and at least one separator;
the composite cover plate comprises an annular cover plate layer, an insulating adhesive layer and a circular cover plate layer, wherein the maximum diameter of the outer side of the annular cover plate layer is larger than that of the outer side of the circular cover plate layer;
one electrode of the composite body is electrically connected with the round cover plate layer, and the other electrode is electrically connected with the cylindrical bottom shell or the annular cover plate layer;
the area of the insulating adhesive layer projected to the annular cover plate layer is at least 0.2-0.9 times of the area of the first side surface of the annular cover plate layer; the first side surface is arranged facing the insulating adhesive layer;
the area of the insulating adhesive layer projected to the circular cover plate layer is at least 0.25-0.95 times of the surface area of the second side of the circular cover plate layer; the second side face is arranged facing the insulating adhesive layer;
the cylindrical bottom shell comprises a round or oval bottom and an annular side wall extending towards the direction of the composite cover plate;
the end part of the annular side wall, which is close to the composite cover plate, is provided with an inscription supporting table and an outside sealing table; the width of the platform of the internally tangent supporting table is more than or equal to one fourth of the thickness of the annular side wall and less than or equal to three quarters of the thickness of the annular side wall;
the height of the outer sealing platform is larger than or equal to 0.2 of the thickness of the annular cover plate layer and smaller than or equal to 1.2 of the thickness of the annular cover plate layer, and the thickness of the outer sealing platform is larger than or equal to 0.2 of the thickness of the annular cover plate layer and smaller than or equal to 0.8 of the thickness of the annular cover plate layer;
the annular cover plate layer merges with the outer sealing land to form a seal.
Optionally, an included angle between the inscription supporting table and the outer sealing table is 90 degrees.
Optionally, an included angle between the inscription supporting table and an inner wall of the annular side wall is 90 degrees.
Optionally, the difference between the annular inner diameter formed by the outer sealing platform and the annular cover plate layer outer diameter is less than or equal to 0.5 times the sum of the annular cover plate layer thickness and the inscribed support platform thickness.
Optionally, the annular cover plate layer has a thickness of 0.1mm to 0.2mm.
Optionally, the annular sidewall has a thickness of 0.1mm to 0.2mm.
Optionally, the outer sealing platform and the annular cover plate layer are made of the same metal material.
Optionally, the bottom shell and the seal welding layer are made of 304 stainless steel or 316 stainless steel.
Optionally, the electrode of the composite body connected with the circular cover plate layer is an anode.
The utility model also provides an electronic product, which comprises an equipment body and a chemical energy storage battery, wherein the chemical energy storage battery is electrically connected with the equipment body so as to provide electric energy for the equipment body;
wherein the chemical energy storage battery comprises a cylindrical bottom shell, a composite cover plate and a composite body, wherein the cylindrical bottom shell and the composite cover plate enclose an inner space, and the composite body is arranged in the inner space and comprises at least one positive electrode, at least one negative electrode and at least one diaphragm;
the composite cover plate comprises an annular cover plate layer, an insulating adhesive layer and a circular cover plate layer, wherein the maximum diameter of the outer side of the annular cover plate layer is larger than that of the outer side of the circular cover plate layer;
one electrode of the composite body is electrically connected with the round cover plate layer, and the other electrode is electrically connected with the cylindrical bottom shell or the annular cover plate layer;
the area of the insulating adhesive layer projected to the annular cover plate layer is at least 0.2-0.9 times of the area of the first side surface of the annular cover plate layer; the first side surface is arranged facing the insulating adhesive layer;
the area of the insulating adhesive layer projected to the circular cover plate layer is at least 0.25-0.95 times of the surface area of the second side of the circular cover plate layer; the second side face is arranged facing the insulating adhesive layer;
the cylindrical bottom shell comprises a round or oval bottom and an annular side wall extending towards the direction of the composite cover plate;
the end part of the annular side wall, which is close to the composite cover plate, is provided with an inscription supporting table and an outside sealing table; the width of the platform of the internally tangent supporting table is more than or equal to one fourth of the thickness of the annular side wall and less than or equal to three quarters of the thickness of the annular side wall;
the height of the outer sealing platform is larger than or equal to 0.2 of the thickness of the annular cover plate layer and smaller than or equal to 1.2 of the thickness of the annular cover plate layer, and the thickness of the outer sealing platform is larger than or equal to 0.2 of the thickness of the annular cover plate layer and smaller than or equal to 0.8 of the thickness of the annular cover plate layer;
the annular cover plate layer merges with the outer sealing land to form a seal.
According to the utility model, the arrangement of the inscription supporting table enables the welded laser to be shielded by the annular cover plate layer and the inscription supporting table, so that the laser is prevented from missing into the battery to damage the composite, the composite is effectively protected, and the safety and the product yield of the battery are improved; meanwhile, the inscription supporting table can bear and solidify the dust formed in the welding process, so that the dust is prevented from falling into the battery, the phenomena of short circuit and the like of the battery caused by the dust are avoided, and the safety and the product yield of the battery are improved;
the connection area between the insulating adhesive layer and the annular cover plate layer is 0.2-0.9 times of the side area of the annular cover plate layer; setting the connection area of the insulating adhesive layer and the round cover plate layer to be 0.25-0.95 times of the surface area of the round cover plate layer; the height of the outer sealing table is set to be 0.2-1.2 times of the thickness of the annular cover plate layer, and the thickness of the outer sealing table is set to be 0.2-0.8 times of the thickness of the annular cover plate layer, so that the connection area of the insulating adhesive layer and the annular cover plate layer and the connection area of the insulating adhesive layer and the circular cover plate layer are large enough, and the connection strength is enough to support the subsequent process (such as the process of injecting electrolyte into the battery, the pressure difference between the inside and the outside of the battery is needed, and the electrolyte enters the accommodating cavity under the action of the pressure difference) and the connection strength required in the working process; meanwhile, when a large amount of gas is formed in the battery, the gas in the battery can wash away the joint of the insulating bonding layer and the annular cover plate layer to obtain release of the gas, so that explosion of the battery is avoided;
and such that the seal layer is welded to the outboard seal land (and in some embodiments, also includes a partial inscription support land adjacent the outboard seal land) at a strength greater than the bond strength of the insulating adhesive layer to the annular cover plate layer, greater than the bond strength of the insulating adhesive layer to the circular cover plate layer, and less than the load bearing strength of the cylindrical bottom shell itself. Thus, when a large amount of gas is generated in the battery due to faults in a short time, the insulating adhesive layer can be flushed firstly, and then the welding position of the annular cover plate layer and the longitudinal welding (in some embodiments, the welding position also comprises a part of inscribed supporting table adjacent to the outer sealing table) is slowly torn, so that gas is slowly leaked; therefore, two air leakage security guarantees are formed, whether the air pressure in the battery is slowly increased or is rapidly increased in a short time, the explosion of the battery can be avoided in an air release and pressure release mode, and the safety of the battery is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a chemical energy storage cell according to an embodiment of the present utility model;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the structure at C-C in FIG. 2;
FIG. 4 is an enlarged schematic view of the structure at P in FIG. 3;
FIG. 5 is a schematic view of the structure of the column bottom shell in FIG. 1;
FIG. 6 is a schematic cross-sectional view of the structure at E-E in FIG. 5;
FIG. 7 is an enlarged schematic view of an embodiment of the portion Q in FIG. 6;
fig. 8 is an enlarged schematic view of another embodiment of fig. 6 at Q.
FIG. 9 is a schematic view of the composite cover plate of FIG. 1;
FIG. 10 is a schematic cross-sectional view of the structure at E-E in FIG. 9;
fig. 11 is an enlarged schematic view of an embodiment at S in fig. 10.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a chemical energy storage battery, which takes a small-sized button battery, a mobile phone battery, a circular ring battery and the like as examples. The structure and principle of the battery will be described in detail.
A chemical energy storage battery comprising a cylindrical bottom case 200, a composite cover plate 100, and a composite body 300, the cylindrical bottom case 200 enclosing an interior space 210 with the composite cover plate 100, the composite body 300 being disposed in the interior space 210 and comprising at least one positive electrode and at least one negative electrode and at least one separator;
the composite cover plate 100 comprises an annular cover plate 110 layer, an insulating bonding layer 120 and a circular cover plate 130 layer, wherein the maximum diameter of the outer side of the annular cover plate 110 layer is larger than the maximum diameter of the outer side of the circular cover plate 130 layer;
one electrode of the composite body 300 is electrically connected with the circular cover plate 130 layer, and the other electrode is electrically connected with the cylindrical bottom shell 200 or the annular cover plate 110 layer;
the area of the insulating adhesive layer 120 projected onto the annular cover plate 110 layer is at least 0.2-0.9 times of the area of the first side surface of the annular cover plate 110 layer; the first side surface is arranged facing the insulating sealing layer;
the area of the insulating adhesive layer 120 projected onto the circular cover plate 130 layer is at least 0.25-0.95 times of the surface area of the second side of the circular cover plate 130 layer; the second side face is arranged to face the insulating sealing layer;
the cylindrical bottom case 200 includes a circular or oval bottom, and an annular sidewall 220 extending in a direction facing the composite cover plate 100;
the end of the annular sidewall 220 near the composite cover plate 100 has an inner support stand 230 and an outer sealing stand 240; the width of the platform of the inner cutting support stand 230 is greater than or equal to one-fourth of the thickness of the annular sidewall 220 and less than or equal to three-fourths of the thickness of the annular sidewall 220;
the height of the outer sealing platform 240 is greater than or equal to 0.2 of the thickness of the annular cover plate 110 and less than or equal to 1.2 of the thickness of the annular cover plate 110, and the thickness of the outer sealing platform 240 is greater than or equal to 0.2 of the thickness of the annular cover plate 110 and less than or equal to 0.8 of the thickness of the annular cover plate 110;
the seal ring cover 110 layer merges with the outer sealing land 240 to form a seal.
Specifically, in this embodiment, the cylindrical bottom shell 200 and the composite cover plate 100 may have a plurality of shapes, and the two shapes enclose a housing cavity. The composite cover plate 100 is hermetically connected with the cylindrical bottom case 200 by welding. The overall shape of the chemical energy storage battery can be various, such as a round cake shape, an oval cake shape, a cuboid shape and the like, and the battery is exemplified as the round cake shape. Preferably, in order to reduce the thickness of the battery case and to improve the service life of the battery, the cylindrical bottom case 200 and the composite cover plate 100 are partially made of metal materials, and in some embodiments, the cylindrical bottom case 200 and the annular cover plate 110 are made of the same metal materials for improving the welding effect. The metal material may be stainless steel, and the specific stainless steel may be 304 stainless steel or 316 stainless steel. Specifically, the annular cover plate 110 layer and the circular cover plate 130 layer of the composite cover plate 100 are both supported by metal materials. The insulating adhesive layer is an insulating adhesive layer, so that the annular cover plate 110 layer and the circular cover plate 130 layer can be insulated and can be tightly connected together.
The composite 300 has a positive electrode and a negative electrode, wherein the positive electrode is electrically connected to the circular cap plate 130 layer; the negative electrode is electrically connected with the annular cap plate 110 layer, or the negative electrode is electrically connected with the cylindrical bottom case 200. Of course, in some embodiments, the negative electrode may also be electrically connected to the circular cap plate 130 layer; the positive electrode is electrically connected with the annular cap plate 110 layer, or the positive electrode is electrically connected with the cylindrical bottom case 200. There are many ways of electrical connection, in this embodiment, the electrode is extended to the position to be connected by soldering. The composite 300 further includes a positive electrode film, a negative electrode film, and a separator, which are stacked one on another and wound to form a wound composite 300 in which the positive electrode film and the negative electrode film are insulated from each other.
The annular cover plate 110 may have a plurality of layers, for example, a circular ring, and has a relief hole 111 in the middle. The shape of the circular cover 130 layer may be varied, for example circular. The annular cover plate 110 layer, the insulating adhesive layer and the circular cover plate 130 layer are sequentially laminated. The shape of the insulating adhesive layer may be varied, for example, in the shape of a ring, which fills the lamination area of the annular cover plate 110 layer and the circular cover plate 130 layer, completely isolating the annular cover plate 110 layer and the circular cover plate 130 layer. The lamination area of the insulating adhesive layer and the layer of the annular cover plate 110 is set to be at least 0.2 times that of the layer of the annular cover plate 110, so that the connection area of the insulating adhesive layer and the layer of the annular cover plate 110 is large enough, and the connection strength of the insulating adhesive layer and the layer of the annular cover plate 110 is sufficient to support the connection strength required in the subsequent process (such as the process of injecting electrolyte into the battery, wherein the electrolyte needs to enter the accommodating cavity under the action of pressure difference through the pressure difference between the inside and the outside of the battery) and the working process. Meanwhile, the lamination area of the insulating adhesive layer and the annular cover plate 110 layer is set to be not more than 0.9 times of the area of the annular cover plate 110 layer, so that when the battery is short-circuited or the battery is internally failed, and a large amount of gas is formed in the battery, the gas in the battery can wash away the joint of the insulating adhesive layer and the annular cover plate 110 layer, so that the gas is released, the explosion of the battery is avoided, and the safety of the battery is improved.
Similarly, by setting the connection area of the insulating adhesive layer and the circular cover plate 130 layer to be at least 0.25 times the surface area of the circular cover plate 130 layer, the connection area of the insulating adhesive layer and the circular cover plate 130 layer can be made large enough, so that the connection strength of the insulating adhesive layer and the circular cover plate 130 layer is sufficient to support the connection strength required in the subsequent process (such as the process of injecting electrolyte into the battery, the pressure difference between the inside of the battery and the outside of the battery is required, and the electrolyte enters the accommodating cavity under the action of the pressure difference) and the working process. Meanwhile, the lamination area of the insulating adhesive layer and the circular cover plate 130 layer is set to be not more than 0.95 times of the area of the circular cover plate 130 layer, so that when the battery is short-circuited or the battery is internally failed, a large amount of gas is formed in the battery, the connection part of the insulating adhesive layer and the circular cover plate 130 layer can be flushed by the gas in the battery, the gas is released, the explosion of the battery is avoided, and the safety of the battery is improved.
The cylindrical bottom shell 200 includes a circular or oval bottom and an annular sidewall 220 extending in a direction facing the composite deck 100. The end of the annular side wall 220 near the composite cover plate 100 is provided with an inscribed supporting table 230 extending to the outer side of the internal accommodating cavity, and the platform width L of the inscribed supporting table 230 is more than or equal to 0.25 of the thickness D of the annular side wall 220. The land width L of the endo-support stand 230 is less than or equal to 0.75 times the thickness D of the annular sidewall 220. The annular cover plate 110 is lapped on the inscription supporting table 230, and in the process of welding the annular cover plate 110 and the outer sealing table 240 through laser, the laser welds the edges of the outer sealing table 240 and the annular cover plate 110. At this time, the laser is shielded by the annular cover plate 110 layer and the inscription supporting table 230, so that the damage to the complex 300 caused by the missing of the laser to the inside of the battery is avoided, the complex 300 is effectively protected, and the safety and the product yield of the battery are improved. Meanwhile, in the actual melting process, the part of the inner cutting support table 230 close to the outer sealing table 240 (the melting position occurs at the side of the inner cutting support table 230 facing the annular cover plate 110 layer) will also melt with the annular cover plate 110 layer, so that the inner cutting support table 230 can bear and solidify the dust formed in the welding process, and the dust is prevented from falling into the battery, thereby avoiding the phenomena of short circuit and the like of the battery caused by the dust, and being beneficial to improving the safety and the product yield of the battery. The platform width L of the endo-supporting stand 230 is not too large or too small, and when the platform width L of the endo-supporting stand 230 is smaller than 0.25 of the thickness D of the annular sidewall 220, dust formed during laser and welding may leak onto the composite 300, which affects the service life and safety of the battery. When the land width L of the inscribed support stand 230 is greater than 0.75 of the thickness D of the annular sidewall 220, dust formed during laser and welding may leak onto the composite 300, affecting the service life and safety of the battery.
Meanwhile, by making the height H of the outer sealing land 240 greater than or equal to 0.2 times the layer thickness d of the annular cover plate 110 and less than or equal to 1.2 times the layer thickness d of the annular cover plate 110; meanwhile, the thickness D2 of the outer sealing table 240 is greater than or equal to 0.2 of the thickness D of the annular cover plate 110 and less than or equal to 0.8 of the thickness D of the annular cover plate 110. Such that the seal layer is welded to the outboard seal land 240 (and in some embodiments, also includes a portion of the inscribed support land 230 adjacent the outboard seal land 240) at a greater strength than the bond strength of the insulating adhesive layer to the annular cover plate 110 layer, than the bond strength of the insulating adhesive layer to the circular cover plate 130 layer, and less than the load bearing strength of the cylindrical bottom shell 200 itself. In this manner, when a large amount of gas is generated within the battery due to a failure within a short period of time, the insulating adhesive layer may be first flushed, and then the welded position of the annular cover plate 110 layer and the longitudinal weld (and, in some embodiments, the partial incision support stand 230 adjacent to the outside sealing stand 240) may be slowly torn. The explosion of the battery is avoided, and the safety of the battery is improved. In some embodiments, the sum of the thickness D2 of the outer sealing land 240 and the width L of the inner cutting support land 230 corresponds to the thickness D of the annular sidewall 220.
In this embodiment, by setting the inscription supporting stand 230, the welded laser is shielded by the annular cover plate 110 layer and the inscription supporting stand 230, so as to avoid the laser missing into the battery and damaging the composite 300, thereby effectively protecting the composite 300 and improving the safety and the product yield of the battery; meanwhile, the inner cutting support table 230 can bear and solidify the dust formed in the welding process, so that the dust is prevented from falling into the battery, the phenomena of short circuit and the like of the battery caused by the dust are avoided, and the safety and the product yield of the battery are improved;
and, the connection area of the insulating adhesive layer and the annular cover plate 110 layer is set to be 0.2-0.9 times of the side area of the annular cover plate 110 layer; setting the connection area of the insulating adhesive layer and the circular cover plate 130 layer to be 0.25-0.95 times of the surface area of the circular cover plate 130 layer; the height of the outer sealing platform 240 is set to be 0.2-1.2 times of the thickness of the annular cover plate 110, and the thickness of the outer sealing platform 240 is set to be 0.2-0.8 times of the thickness of the annular cover plate 110, so that the connection area between the insulating adhesive layer and the annular cover plate 110 and the connection area between the insulating adhesive layer and the circular cover plate 130 are large enough to support the subsequent process (such as the process of injecting electrolyte into the battery, the pressure difference between the inside and the outside of the battery is needed, and the electrolyte enters the accommodating cavity under the action of the pressure difference) and the connection strength required in the working process; meanwhile, when a large amount of gas is formed in the battery, the gas in the battery can wash away the joint of the insulating bonding layer and the annular cover plate 110 layer to obtain release of the gas, so that explosion of the battery is avoided;
and, the weld strength of the seal layer to the outboard seal stage 240 (and, in some embodiments, the portion of the inscribed support stage 230 adjacent the outboard seal stage 240) is greater than the bond strength of the insulating adhesive layer to the annular cover plate 110 layer, greater than the bond strength of the insulating adhesive layer to the circular cover plate 130 layer, and less than the load bearing strength of the cylindrical bottom shell 200 itself. Thus, when a large amount of gas is generated in the battery due to a fault in a short time, the insulating adhesive layer can be flushed first, and then the welding position of the annular cover plate 110 layer and the longitudinal welding (in some embodiments, the partial inscription support stand 230 adjacent to the outer sealing stand 240) can be torn slowly, so that gas is slowly leaked; therefore, two air leakage security guarantees are formed, whether the air pressure in the battery is slowly increased or is rapidly increased in a short time, the explosion of the battery can be avoided in an air release and pressure release mode, and the safety of the battery is greatly improved.
In some embodiments, in order to improve the convenience of the overlapping and welding between the annular cover plate 110 and the inner seal land 230, the included angle between the inner seal land 230 and the outer seal land 240 is 90 degrees. The included angle between the inner support 230 and the inner wall of the annular sidewall 220 is 90 degrees.
In some embodiments, to improve the explosion-proof effect of the chemical energy storage battery, the difference between the inner diameter of the ring shape formed by the outer sealing table 240 and the outer diameter of the ring-shaped cover plate 110 layer is less than or equal to 0.5 times the sum of the thicknesses of the ring-shaped cover plate 110 layer and the inscription support table 230.
That is, in the present embodiment, the outside sealing land 240 is formed to have an inner diameter larger than the outer diameter of the annular cover plate 110 layer, that is, a welding gap is provided between the edge of the annular cover plate 110 layer and the inner side wall of the outside sealing land 240, which is larger than 0 and equal to or smaller than 0.25 times the sum of the thicknesses of the outside sealing land 240 and the annular cover plate 110 layer (the difference in radial dimension is 2 times the one-sided gap). In this way, the distance between the outer sealing table 240 and the layer edge of the annular cover plate 110 can be ensured to be small enough, the welding quality can be ensured, the phenomenon of cold joint is avoided, and the improvement of the product yield is facilitated. The thickness of the annular cover plate 110 layer is 0.1mm-0.2mm, the thickness of the outer sealing table 240 is 0.1mm-0.2mm, when the thickness of the annular cover plate 110 layer is 0.2mm, the thickness of the outer sealing table 240 is 0.2mm, the difference of diameters is 0.5 (0.2+0.2) mm=0.2 mm, and the size of the gap is 0.2 mm/2=0.1 mm. When the thickness of the annular cover plate 110 layer is 0.1mm and the thickness of the outer sealing land 240 is 0.1mm, the difference in diameter is 0.5 x (0.1+0.1) mm=0.1 mm, and the size of the gap is 0.1 mm/2=0.05 mm.
In some embodiments, the thickness of the annular cover plate 110 layer is 0.1mm-0.2mm, for example 0.12mm, 0.15mm, 0.16mm, 0.18mm, in order to enhance the explosion-proof effect of the battery. The annular sidewall 220 has a thickness of 0.1mm to 0.2mm, for example 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.16mm, 0.18 mm. In this embodiment, the thickness of the annular cover plate 110 layer is set to be 0.1mm-0.2mm, and the thickness of the bottom shell is set to be 0.1mm-0.2mm, so that the structural strength of the welded part is smaller than that of the bottom shell.
The utility model also provides an electronic product, which comprises an equipment body and a battery, wherein the battery is electrically connected with the equipment body so as to provide electric energy for the equipment body. The specific structure of the battery refers to the above embodiments, and since the battery adopts all the technical solutions of all the embodiments, the battery has at least all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein. The battery can be arranged as a button battery which is mainly applied to the electronic product to provide electric energy for the electronic product. The electronic product can be an earphone, a watch and the like, and has smaller voltage.
The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. A chemical energy storage battery is characterized in that,
the chemical energy storage battery comprises a cylindrical bottom shell, a composite cover plate and a composite body, wherein the cylindrical bottom shell and the composite cover plate enclose an inner space, and the composite body is arranged in the inner space and comprises at least one positive electrode, at least one negative electrode and at least one diaphragm;
the composite cover plate comprises an annular cover plate layer, an insulating adhesive layer and a circular cover plate layer, wherein the maximum diameter of the outer side of the annular cover plate layer is larger than that of the outer side of the circular cover plate layer;
one electrode of the composite body is electrically connected with the round cover plate layer, and the other electrode is electrically connected with the cylindrical bottom shell or the annular cover plate layer;
the area of the insulating adhesive layer projected to the annular cover plate layer is at least 0.2-0.9 times of the area of the first side surface of the annular cover plate layer; the first side surface is arranged facing the insulating adhesive layer;
the area of the insulating adhesive layer projected to the circular cover plate layer is at least 0.25-0.95 times of the surface area of the second side of the circular cover plate layer; the second side face is arranged facing the insulating adhesive layer;
the cylindrical bottom shell comprises a round or oval bottom and an annular side wall extending towards the direction of the composite cover plate;
the end part of the annular side wall, which is close to the composite cover plate, is provided with an inscription supporting table and an outside sealing table; the width of the platform of the internally tangent supporting table is more than or equal to one fourth of the thickness of the annular side wall and less than or equal to three quarters of the thickness of the annular side wall;
the height of the outer sealing platform is larger than or equal to 0.2 of the thickness of the annular cover plate layer and smaller than or equal to 1.2 of the thickness of the annular cover plate layer, and the thickness of the outer sealing platform is larger than or equal to 0.2 of the thickness of the annular cover plate layer and smaller than or equal to 0.8 of the thickness of the annular cover plate layer;
the annular cover plate layer merges with the outer sealing land to form a seal.
2. A chemical energy storage cell according to claim 1, wherein the included angle between the inscribed support platform and the outside sealing platform is 90 degrees.
3. A chemical energy storage cell according to claim 1, wherein the angle between the inscribed support table and the inner wall of the annular sidewall is 90 degrees.
4. A chemical energy storage cell as defined in claim 1, wherein the difference between the inside diameter of the annular shape formed by the outside sealing land and the outside diameter of the annular cover plate layer is less than or equal to 0.5 times the sum of the annular cover plate layer thickness and the inscribed support land thickness.
5. A chemical energy storage cell as defined in claim 1, wherein the annular cover plate layer has a thickness of 0.1mm to 0.2mm.
6. A chemical energy storage cell according to claim 1, wherein the annular sidewall has a thickness of 0.1mm to 0.2mm.
7. A chemical energy storage cell as defined in any one of claims 1-6, wherein said outer sealing land and said annular cover plate layer are of the same metal material.
8. A chemical energy storage cell as defined in claim 7, wherein the material of said outer sealing land and said annular cover plate layer is 304 stainless steel or 316 stainless steel.
9. A chemical energy storage cell as defined in claim 1, wherein the electrode of said composite to which said circular cap layer is attached is a positive electrode.
10. An electronic product comprising a device body and a chemical energy storage battery as claimed in any one of claims 1 to 9, the battery being electrically connected to the device body to provide electrical energy to the device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222982039.0U CN220121965U (en) | 2022-11-08 | 2022-11-08 | Chemical energy storage battery and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222982039.0U CN220121965U (en) | 2022-11-08 | 2022-11-08 | Chemical energy storage battery and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220121965U true CN220121965U (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222982039.0U Active CN220121965U (en) | 2022-11-08 | 2022-11-08 | Chemical energy storage battery and electronic product |
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| Country | Link |
|---|---|
| CN (1) | CN220121965U (en) |
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