CN111564590A - Battery with explosion-proof structure - Google Patents
Battery with explosion-proof structure Download PDFInfo
- Publication number
- CN111564590A CN111564590A CN202010399039.0A CN202010399039A CN111564590A CN 111564590 A CN111564590 A CN 111564590A CN 202010399039 A CN202010399039 A CN 202010399039A CN 111564590 A CN111564590 A CN 111564590A
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- Prior art keywords
- explosion
- proof
- metal shell
- battery
- shell
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- 239000002184 metal Substances 0.000 claims abstract description 127
- 229910052751 metal Inorganic materials 0.000 claims abstract description 127
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 239000011889 copper foil Substances 0.000 claims description 10
- 238000004880 explosion Methods 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 description 17
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- H01M50/30—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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention provides a battery with an explosion-proof structure, which comprises a shell, an explosion-proof sheet, a battery core and an insulating rubber ring, wherein the shell comprises an inner metal shell and an outer metal shell, the inner metal shell and the outer metal shell are sleeved, the shell is provided with a sinking groove and an explosion-proof through hole, the explosion-proof through hole is communicated with an inner cavity and an external space of the shell, the sinking groove is formed by cutting the outer surface of the shell, the explosion-proof through hole is positioned in the sinking groove, the explosion-proof sheet is connected in the sinking groove, and the explosion-proof sheet seals the explosion-proof through hole; the battery core is arranged in the inner metal shell, and the insulating rubber ring is arranged between the outer metal shell and the inner metal shell in a sealing manner. According to the invention, the sinking groove is formed by cutting the outer surface of the shell, the explosion-proof sheet is connected in the sinking groove, when the battery is heated, high-pressure gas can be generated in the battery, and the high-pressure gas can burst the explosion-proof sheet to release the high-pressure gas, so that the battery has an explosion-proof function, and meanwhile, the space in the battery is increased, thereby the capacity of the battery can be increased.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery with an explosion-proof structure.
Background
A battery is a device that contains an electrolyte solution and metal electrodes, and is capable of converting chemical energy into electrical energy. Among them, the battery is thin and small in size, so that it is often used in various electronic products to be powered by the battery. Wherein the battery is under the condition that suffers the unconventional operation such as fire is roast, violent striking, the intensification that generates heat easily for the inside gas of battery increases, and atmospheric pressure increases, and then probably breaks outer metal casing release energy, leads to the battery to catch fire or explode, consequently can set up some blast resistant construction on the battery often, but in prior art, blast resistant construction on the battery need carry out stamping process on the battery casing, and this stamping structure often can occupy the inside partial space of battery, thereby influences the capacity of battery.
It is desirable to provide a battery having an explosion-proof structure to solve the above-mentioned technical problems.
Disclosure of Invention
The invention provides a battery with an explosion-proof structure, which is characterized in that a sinking groove is formed by cutting the outer surface of a shell, and an explosion-proof sheet is connected in the sinking groove, so that the problem that the explosion-proof structure on the battery often occupies partial space in the battery and influences the capacity of the battery in the prior art is solved.
In order to solve the technical problems, the technical scheme of the invention is as follows: a battery having an explosion-proof structure, comprising:
the anti-explosion shell comprises a shell, a shell body and a shell cover, wherein the shell body comprises an inner metal shell and an outer metal shell, the inner metal shell is of a cylindrical structure, one end of the inner metal shell is provided with a first opening, the outer metal shell is of a cylindrical structure, one end of the outer metal shell is provided with a second opening, the first opening is in butt joint with the second opening, the shell body is provided with a sinking groove and an anti-explosion through hole, the anti-explosion through hole is communicated with an inner cavity and an outer space of the shell body, the sinking groove is formed by cutting the outer surface of the shell body, and the anti-;
the explosion-proof sheet is connected in the sinking groove, the explosion-proof sheet seals the explosion-proof through hole, the area of the explosion-proof sheet opposite to the through hole is an explosion-proof area, a crack line is arranged on the explosion-proof sheet, and at least part of the crack line is positioned in the explosion-proof area;
the battery cell is arranged in the inner metal shell; and
and the insulating rubber ring is arranged between the outer metal shell and the inner metal shell in a sealing manner, and one end of the outer metal shell is connected to the periphery of the insulating rubber ring in a locking manner, so that a seal is formed between the edge of the outer metal shell and the insulating rubber ring.
In the invention, the inner surface of the explosion-proof sheet is provided with two fracture lines which are arranged in a staggered manner, and the intersection point of the two fracture lines is positioned in the explosion-proof area.
In the invention, the explosion-proof sheet is provided with a fracture line which is of an annular structure, the annular structure comprises a closed end and a non-closed end, and the closed end is positioned in the explosion-proof area.
In the invention, the sinking groove is arranged on the outer end face of the inner metal shell and is close to the edge of the end face of the inner metal shell, or the sinking groove is arranged on the outer end face of the outer metal shell and is close to the edge of the end face of the outer metal shell.
In the invention, the battery also comprises an upper insulating sheet and a lower insulating sheet, wherein the upper insulating sheet is arranged between the electric core and the inner top surface of the inner metal shell, the lower insulating sheet is arranged between the electric core and the inner bottom surface of the outer metal shell, and the upper insulating sheet or the lower insulating sheet is provided with an air hole.
In the invention, the explosion-proof sheet is a copper foil, the copper foil is connected in the sinking groove in a hot-press welding mode, and the depth of the sinking groove is equal to the thickness of the copper foil.
In the invention, the insulating rubber ring is coated on the inner surface and the outer surface of the axial side plate of the inner metal shell, the edge of the inner metal shell close to the first opening is provided with a folded edge, the folded edge protrudes outwards, and the folded edge is clamped and fixed with the insulating rubber ring.
The edge of the inner side of one end, close to the first opening, of the insulating rubber ring is provided with an oblique chamfer, and the edge of the outer side of the insulating rubber ring is provided with a round chamfer.
In the invention, a tightening section is arranged at one end, far away from the second opening, in the outer metal shell, and the inner diameter of one end, close to the second opening, of the tightening section is larger than that of one end, far away from the second opening, of the tightening section.
In the invention, the ratio of the height of the tightening section to the height of the outer metal shell is between 0.15 and 0.7, and the included angle between the inner wall surface of the tightening section and the inner wall surface of the outer metal shell is between 170 and 179 degrees.
In the invention, the inner wall of the outer metal shell is provided with an annular raised line, the annular raised line is in interference connection with the insulating rubber ring, and the annular raised line is formed by punching the outer side of the outer metal shell.
In the invention, one end of the outer side surface of the inner metal shell is provided with an inner shell clamping part, the inner shell clamping part comprises a first convex part at the inner side and a first concave part at the outer side, and the insulating rubber ring at the inner side is coated on the non-arranged area of the first convex part on the inner surface of the inner metal shell;
the insulating rubber ring is provided with a rubber ring clamping portion, the rubber ring clamping portion comprises an inner second convex portion and an outer second concave portion, the second convex portion is clamped in the first concave portion, and the edge of the outer metal shell is clamped in the second concave portion.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the sinking groove is formed by cutting the outer surface of the shell, the explosion-proof sheet is connected in the sinking groove, when the battery is heated, high-pressure gas can be generated in the battery, and the high-pressure gas can burst the explosion-proof sheet to release the high-pressure gas, so that the battery has an explosion-proof function, and meanwhile, the space in the battery is increased, thereby the capacity of the battery can be increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.
Fig. 1 is a schematic sectional view showing the structure of an explosion-proof through-hole of a battery having an explosion-proof structure according to the present invention, when the explosion-proof through-hole is provided in an inner metal case.
Fig. 2 is an enlarged view of a portion of the structure at X in fig. 1.
Fig. 3 is an enlarged view of a portion of the structure at Y in fig. 1.
Fig. 4 is a schematic structural view of a rupture disk provided with two fracture lines.
Fig. 5 is a schematic structural view of a rupture disk provided with a ring-structured fracture line.
Fig. 6 is a schematic structural view of a rupture disk provided with a ring-structured fracture line.
Fig. 7 is a schematic structural diagram of the upper insulation sheet.
Fig. 8 is a schematic structural view of the battery having an explosion-proof structure according to the present invention, in which the outer metal case is provided with annular protrusions.
Fig. 9 is a schematic structural diagram of the battery with an explosion-proof structure according to the present invention, in which the inner metal case is provided with an inner case engaging portion.
Fig. 10 is a schematic sectional view showing the structure of an explosion-proof through-hole of a battery having an explosion-proof structure according to the present invention, when the explosion-proof through-hole is provided in an outer metal case.
An outer metal shell 11; an annular rib 111; a housing explosion-proof through hole 112; an inner metal shell 12; an inner shell explosion-proof through hole 121; a folded edge 122; an inner shell engaging portion 123; an insulating rubber ring 13; a rubber ring air escape 131; a rubber ring engaging portion 132; a cell 14; a negative electrode tab 15; a positive electrode tab 16; an upper insulating sheet 17; a vent hole 171; a lower insulating sheet 18; an explosion-proof sheet 19; a tear line 191; the length L is compacted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom" are used only with reference to the orientation of the drawings, and the directional terms are used for illustration and understanding of the present invention, and are not intended to limit the present invention.
The terms "first," "second," and the like in the terms of the invention are used for descriptive purposes only and not for purposes of indication or implication relative importance, nor as a limitation on the order of precedence.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., the connection may be a detachable connection or a connection in a unitary structure; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the prior art, the explosion-proof structure on the battery needs to be stamped on the battery shell, and the stamped structure often occupies part of the space inside the battery, thereby affecting the capacity of the battery.
The following is a first embodiment of the present invention that provides a battery having an explosion-proof structure that can solve the above technical problems.
Referring to fig. 1 and 2, fig. 1 is a schematic sectional view illustrating an explosion-proof through hole of a battery having an explosion-proof structure according to the present invention disposed on an inner metal case, and fig. 2 is an enlarged view of a portion at X in fig. 1.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The invention provides a battery with an explosion-proof structure, which comprises a shell, an explosion-proof sheet 19, a battery cell 14 and an insulating rubber ring 13.
Wherein, the casing includes interior metal casing 12 and outer metal casing 11, interior metal casing 12 has first open-ended tubular structure for one end, outer metal casing 11 has second open-ended tubular structure for one end, first opening and second opening butt joint are provided with heavy groove and explosion-proof through-hole on the casing, the inner chamber and the exterior space of explosion-proof through-hole intercommunication casing, heavy groove is formed through the mode of carrying out cutting process to the surface of casing, if mill the surface to the casing in order to form heavy groove, explosion-proof through-hole is located heavy inslot.
The explosion-proof sheet 19 is connected in the sinking groove, the explosion-proof through hole is sealed by the explosion-proof sheet 19, the area of the explosion-proof sheet 19 opposite to the through hole is an explosion-proof area, a crack line 191 is arranged on the explosion-proof sheet 19, and at least part of the crack line 191 is positioned in the explosion-proof area.
The battery cell 14 is arranged in the inner metal shell 12, the battery cell 14 is connected with the outer metal shell 11 through a positive electrode tab 16, and the battery cell 14 is connected with the inner metal shell 12 through a negative electrode tab 15.
The insulating rubber ring 13 is arranged between the outer metal shell 11 and the inner metal shell 12 in a sealing mode, so that sealing and insulation are formed between the outer metal shell 11 and the inner metal shell 12, one end of the outer metal shell 11 is connected to the periphery of the insulating rubber ring 13 in a locking mode, and a seal is formed between the edge of the outer metal shell 11 and the insulating rubber ring 13.
When the battery generates heat, high-pressure gas is generated in the battery, and when the air pressure reaches a certain degree, the high-pressure gas can burst the explosion-proof sheet 19 along the crack line 191, a release through hole is formed on the explosion-proof sheet 19, and the high-pressure gas can be released through the explosion-proof through hole and the release through hole to prevent the battery from catching fire or exploding.
The height-diameter ratio of the battery with the explosion-proof structure is between 0.4 and 1.
Referring to fig. 1, the sinking groove in this embodiment may be an inner shell sinking groove disposed on an outer end surface of the inner metal shell 12, the explosion-proof through hole is an inner shell explosion-proof through hole 121 disposed on an end surface of the inner metal shell 12, the inner shell explosion-proof through hole 121 is located in the inner shell sinking groove, and the inner shell sinking groove is close to an end surface edge of the inner metal shell 12, so as to prevent the inner shell explosion-proof through hole 121 from interfering with the negative electrode tab 15.
Or referring to fig. 10, the sinking groove in this embodiment may also be an outer shell sinking groove disposed on the outer end surface of the outer metal shell 11, the explosion-proof through hole is an outer shell explosion-proof through hole 112 disposed on the end surface of the outer metal shell 11, the outer shell explosion-proof through hole 112 is located in the outer shell sinking groove, and the outer shell sinking groove is close to the edge of the end surface of the inner metal shell 12, so as to prevent the inner shell explosion-proof through hole 121 from interfering with the positive electrode tab 16.
Referring to fig. 4, preferably, two fracture lines 191 are disposed on the inner surface of the explosion-proof sheet 19, the two fracture lines 191 are disposed in a staggered manner, and the intersection point of the two fracture lines 191 is located in the explosion-proof area.
Referring to fig. 5 and 6, a crack line may be further disposed on the explosion-proof plate 19, where the crack line is of a ring structure, and the ring structure includes a closed end and a non-closed end, and the closed end is located in the explosion-proof area. Through the arrangement of the non-closed end, when high-pressure gas in the battery breaks the explosion-proof sheet 19 along the crack line, fragments of the explosion-proof sheet 19 can be prevented from splashing.
The lower end of the fracture line in fig. 5 is a closed end, the upper end of the fracture line is a non-closed end, the lower end of the fracture line in fig. 6 is a closed end, and the upper end of the fracture line is a non-closed end.
Referring to fig. 7, in the present invention, the battery further includes an upper insulation sheet 17 and a lower insulation sheet 18, the upper insulation sheet 17 is disposed between the battery cell 14 and the inner top surface of the inner metal shell 12, the lower insulation sheet 18 is disposed between the battery cell 14 and the inner bottom surface of the outer metal shell 11, the upper insulation sheet 17 and the lower insulation sheet 18 can isolate the battery cell 14 from the inner metal shell 12, and the upper insulation sheet 17 or the lower insulation sheet 18 is provided with a vent hole 171, so that when the battery cell 14 generates heat, gas inside the battery can flow to the explosion-proof through hole 171 through the vent hole.
As shown in fig. 1, especially in the case where the battery cell 14 is a wound battery cell, the battery cell 14 generates heat, and gas generated in the gap between the battery cell membranes of the battery cell 14 can better flow to the explosion-proof through hole through the vent hole 171.
The explosion-proof sheet 19 in this embodiment is a copper foil, the copper foil is connected in the sinking groove by means of thermocompression bonding, the depth of the sinking groove is equal to the thickness of the copper foil, and the depth of the sinking groove is processed based on the thickness of the copper foil.
In the invention, the insulating rubber ring 13 is coated on the inner and outer surfaces of the axial side plate of the inner metal shell 12, and the insulating rubber ring 13 on the inner surface of the inner metal shell 12 can isolate the inner metal shell 12 from the battery cell 14, so that insulation is formed between the inner metal shell 12 and the battery cell 14.
Referring to fig. 3, a folded edge 122 is disposed at an edge of the inner metal shell 12 close to the first opening, the folded edge 122 protrudes outward, and the folded edge 122 is fastened to the insulating rubber ring 13, so that the inner metal shell 12 and the insulating rubber ring 13 are connected and fastened.
The insulating rubber ring 13 is provided with a rubber ring air release opening 131. When the battery generates heat, high-pressure gas is generated inside the battery, and the high-pressure gas can separate the outer metal shell 11 from the insulating rubber ring 13. When outer metal casing 11 and insulating rubber ring 13 separate to the settlement degree, insulating rubber ring 13 no longer with outer metal casing 11 sealing connection for rubber ring air escape port 131 can communicate the inner space and the exterior space of outer metal casing 11, thereby can prevent through the release of rubber ring air escape port 131 that high-pressure gas from catching fire or exploding.
When the battery generates heat rapidly, high-pressure gas does not have time to release through explosion-proof through hole and release through hole, and high-pressure gas can make outer metal casing 11 and insulating rubber ring 13 separate, and the explosion-proof structure of the mouth 131 that loses heart of rubber ring just can play a role, and the explosion-proof structure of the mouth 131 that loses heart of rubber ring combines with the explosion-proof structure of explosion-proof piece 19 to form dual explosion-proof, and the explosion-proof performance is better.
The insulating rubber ring 13 in this embodiment is provided with an oblique chamfer at the inner side edge of one end close to the first opening, and a round chamfer is provided at the outer side edge. The inner side of the insulating rubber ring 13 is provided with an oblique chamfer, so that excessive interference between the insulating rubber ring 13 and the battery cell 14 during assembly can be avoided, and the outer side of the insulating rubber ring 13 is provided with a round chamfer, so that the assembly between the insulating rubber ring 13 and the outer metal shell 11 is facilitated.
In the present invention, a contracting section L is disposed at an end of the outer metal shell 11 far away from the second opening, and an inner diameter of the contracting section L gradually decreases along a direction of the second opening toward an inner bottom surface of the outer metal shell 11, that is, an inner diameter of an end of the contracting section L close to the second opening is larger than an inner diameter of an end of the contracting section L far away from the second opening.
In the early stage of the sleeving connection of the insulating rubber ring 13 and the outer metal shell 11, a gap is formed between the insulating rubber ring 13 and the inner wall of the outer metal shell 11, so that the installation is convenient and easy.
And when the insulating rubber ring 13 is gradually connected with the tightening section L, the insulating rubber ring 13 gradually forms interference connection with the outer metal shell 11, then, the edge of the outer metal shell 11 is pressurized to deform, and after the deformation is generated, the edge of the outer metal shell 11 is locked and connected to the periphery of the insulating rubber ring 13, so that a seal is formed between the edge of the outer metal shell 11 and the insulating rubber ring 13, the outer metal shell 11 and the insulating rubber ring 13 are firmly sleeved, and the sealing performance between the insulating rubber ring and the outer metal shell 11 is better.
In the embodiment, the ratio of the height of the contraction section L to the height of the outer metal shell 11 is between 0.15 and 0.7, and the included angle between the inner wall surface of the contraction section L and the inner wall surface of the outer metal shell 11 is between 170 and 179 degrees.
Referring to fig. 8, in the present invention, an annular protrusion 111 is disposed on an inner wall of the outer metal shell 11, the annular protrusion 111 is in interference connection with the insulating rubber ring 13, and the annular protrusion 111 is formed by punching an outer side of the outer metal shell 11.
The annular rib 111 can enhance the connection between the outer metal shell 11 and the inner metal shell 12, and the annular rib 111 is formed by punching after the outer metal shell 11 and the inner metal shell 12 are assembled, so that the assembling operation of the outer metal shell 11 and the inner metal shell 12 is not affected.
Referring to fig. 9, in the present invention, an inner shell fastening portion 123 is disposed at one end of the outer side surface of the inner metal shell 12, the inner shell fastening portion 123 includes a first convex portion at the inner side and a first concave portion at the outer side, and the inner insulating rubber ring 13 is wrapped in a non-disposed region of the first convex portion region of the inner surface of the inner metal shell 12, that is, as shown in fig. 9, the inner insulating rubber ring 13 of the inner metal shell 12 does not extend from bottom to top until it contacts with the first convex portion, so that the space is saved.
Be provided with rubber ring joint portion 132 on the insulating rubber ring 13, rubber ring joint portion 132 includes the second concave part in the inboard second convex part and the outside, and second convex part joint is in first concave part, and the border joint of outer metal casing 11 is in the second concave part, through setting up inner shell joint portion 123 and rubber ring joint portion 132, can be connected outer metal casing 11 and insulating rubber ring 13 more firmly.
According to the invention, the sinking groove is formed by cutting the outer surface of the shell, the explosion-proof sheet is connected in the sinking groove, when the battery is heated, high-pressure gas can be generated in the battery, and the high-pressure gas can burst the explosion-proof sheet to release the high-pressure gas, so that the battery has an explosion-proof function, and meanwhile, the space in the battery is increased, thereby the capacity of the battery can be increased.
In summary, although the present invention has been described with reference to two embodiments, the above embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A battery having an explosion-proof structure, comprising:
the anti-explosion shell comprises a shell, a shell body and a shell cover, wherein the shell body comprises an inner metal shell and an outer metal shell, the inner metal shell is of a cylindrical structure, one end of the inner metal shell is provided with a first opening, the outer metal shell is of a cylindrical structure, one end of the outer metal shell is provided with a second opening, the first opening is in butt joint with the second opening, the shell body is provided with a sinking groove and an anti-explosion through hole, the anti-explosion through hole is communicated with an inner cavity and an outer space of the shell body, the sinking groove is formed by cutting the outer surface of the shell body, and the anti-;
the explosion-proof sheet is connected in the sinking groove, the explosion-proof sheet seals the explosion-proof through hole, the area of the explosion-proof sheet opposite to the through hole is an explosion-proof area, a crack line is arranged on the explosion-proof sheet, and at least part of the crack line is positioned in the explosion-proof area;
the battery cell is arranged in the inner metal shell; and
and the insulating rubber ring is arranged between the outer metal shell and the inner metal shell in a sealing manner, and one end of the outer metal shell is connected to the periphery of the insulating rubber ring in a locking manner, so that a seal is formed between the edge of the outer metal shell and the insulating rubber ring.
2. The battery with the explosion-proof structure as defined in claim 1, wherein two said fracture lines are provided on the inner surface of the explosion-proof sheet, the two said fracture lines are staggered, and the intersection point of the two said fracture lines is located in the explosion-proof area.
3. The battery with an explosion-proof structure as recited in claim 1, wherein the explosion-proof sheet is provided with a score line, the score line is of a ring structure, the ring structure comprises a closed end and a non-closed end, and the closed end is located in the explosion-proof area.
4. The battery having an explosion-proof structure as set forth in claim 1, wherein said sink is provided on an outer end face of said inner metal case and said sink is close to an end face edge of said inner metal case, or said sink is provided on an outer end face of said outer metal case and said sink is close to an end face edge of said outer metal case.
5. The battery with an explosion-proof structure as defined in claim 1, wherein the battery further comprises an upper insulation sheet and a lower insulation sheet, the upper insulation sheet is disposed between the battery core and the inner top surface of the inner metal shell, the lower insulation sheet is disposed between the battery core and the inner bottom surface of the outer metal shell, and a vent hole is disposed on the upper insulation sheet or the lower insulation sheet.
6. The battery with the explosion-proof structure as defined in claim 1, wherein the explosion-proof sheet is a copper foil, the copper foil is connected in the sinking groove by means of thermocompression bonding, and the depth of the sinking groove is equal to the thickness of the copper foil.
7. The battery with the explosion-proof structure as claimed in claim 1, wherein the insulating rubber ring is coated on the inner and outer surfaces of the axial side plate of the inner metal shell, and the edge of the inner metal shell close to the first opening is provided with a folded edge, the folded edge protrudes outwards, and the folded edge is fastened with the insulating rubber ring.
8. A battery having an explosion proof structure as recited in claim 1, wherein an end of the outer metal case remote from the second opening is provided with a constricted section, and an inner diameter of the constricted section near the end of the second opening is larger than an inner diameter of the constricted section at the end remote from the second opening.
9. The battery with the explosion-proof structure as defined in claim 1, wherein the inner wall of the outer metal shell is provided with an annular rib, the annular rib is in interference connection with the insulating rubber ring, and the annular rib is formed by punching the outer side of the outer metal shell.
10. The battery with the explosion-proof structure as recited in claim 1, wherein an inner housing engaging portion is disposed at one end of the outer side surface of the inner metal housing, the inner housing engaging portion includes an inner first convex portion and an outer first concave portion, and the inner insulating rubber ring is wrapped around a non-disposed region of the first convex portion of the inner surface of the inner metal housing;
the insulating rubber ring is provided with a rubber ring clamping portion, the rubber ring clamping portion comprises an inner second convex portion and an outer second concave portion, the second convex portion is clamped in the first concave portion, and the edge of the outer metal shell is clamped in the second concave portion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211295917.XA CN115548570A (en) | 2020-05-12 | 2020-05-12 | Explosion-proof packaging structure and corresponding battery |
| CN202010399039.0A CN111564590B (en) | 2020-05-12 | 2020-05-12 | Battery with explosion-proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010399039.0A CN111564590B (en) | 2020-05-12 | 2020-05-12 | Battery with explosion-proof structure |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211295917.XA Division CN115548570A (en) | 2020-05-12 | 2020-05-12 | Explosion-proof packaging structure and corresponding battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111564590A true CN111564590A (en) | 2020-08-21 |
| CN111564590B CN111564590B (en) | 2022-11-18 |
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| CN202010399039.0A Active CN111564590B (en) | 2020-05-12 | 2020-05-12 | Battery with explosion-proof structure |
| CN202211295917.XA Pending CN115548570A (en) | 2020-05-12 | 2020-05-12 | Explosion-proof packaging structure and corresponding battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112701341A (en) * | 2020-12-28 | 2021-04-23 | 广东微电新能源有限公司 | Battery and electronic equipment |
| WO2023159639A1 (en) * | 2022-02-28 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Housing, battery cell, battery, and electrical device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111564590B (en) | 2022-11-18 |
| CN115548570A (en) | 2022-12-30 |
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