CN217522178U - Safe pressure relief structure and battery shell with same - Google Patents
Safe pressure relief structure and battery shell with same Download PDFInfo
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- CN217522178U CN217522178U CN202221019194.6U CN202221019194U CN217522178U CN 217522178 U CN217522178 U CN 217522178U CN 202221019194 U CN202221019194 U CN 202221019194U CN 217522178 U CN217522178 U CN 217522178U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of battery manufacturing process, concretely relates to safe pressure release structure, including the first explosion-proof closing plate, the explosion-proof sealed pad and the explosion-proof closing plate of superpose in proper order, the pressure release mouth has been seted up to first explosion-proof closing plate, and explosion-proof sealed pad lid is established and is sealed the pressure release mouth, and the explosion-proof closing plate of second is located explosion-proof sealed one side of keeping away from the pressure release mouth that fills up, and the second explosion-proof closing plate overlaps at explosion-proof sealed at least part of the orthographic projection of filling up with the pressure release mouth. The utility model discloses a fail safe nature is good, can ensure that the pressure release of battery is stable high-efficient. Furthermore, the utility model also provides a battery case.
Description
Technical Field
The utility model belongs to the technical field of battery manufacturing process, concretely relates to safe pressure release structure and have battery case of this structure.
Background
With the advent of 5G and the continuous improvement of market demand, the requirements of customers on the performance of the battery cell are higher and higher, wherein the safety performance of the battery is always required to be considered in the structural design of the battery cell. For example, when a short circuit or overcharge occurs in a battery cell, thermal runaway may occur in the battery cell, and the pressure may suddenly rise, thereby causing explosion or ignition of the battery cell.
The conventional battery is difficult to ensure the safety of the battery in pressure relief, and when the internal air pressure of the battery is too high, the air pressure easily and directly breaks through the battery shell, so that the safety of the battery in pressure relief is at a lower level. Therefore, a new technical solution is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: to prior art's not enough, provide a safe pressure release structure, its fail safe nature is good, can ensure that the pressure release of battery is stable high-efficient.
In order to realize the purpose, the utility model adopts the following technical scheme:
a safety pressure relief structure comprising:
the first explosion-proof sealing plate is provided with a pressure relief port;
the explosion-proof sealing gasket is overlapped on the first explosion-proof sealing plate, and the explosion-proof sealing gasket covers and seals the pressure relief port;
the second explosion-proof sealing plate is superposed on one side, far away from the pressure relief opening, of the explosion-proof sealing gasket;
the second explosion-proof sealing plate and the pressure relief opening are at least partially overlapped in the orthographic projection of the explosion-proof sealing gasket.
As an improvement of the pressure relief structure of the utility model, the second explosion-proof sealing plate is in the orthographic projection of the explosion-proof sealing gasket is wholly located the pressure relief opening is in within the orthographic projection of the explosion-proof sealing gasket.
As the utility model discloses an improvement of pressure release structure, the at least partial embedding of second explosion-proof sealing plate the explosion-proof sealing gasket, the pressure release mouth with the edge of second explosion-proof sealing plate is in it is regional to enclose into the pressure release on the explosion-proof sealing gasket, the inside gas of discharge battery can be melted to the pressure release region under high temperature.
As the utility model discloses an improvement of pressure relief structure, the pressure release mouth is the circle of radius R1, the explosion-proof closing plate of second satisfies the relational expression for the circle of radius R3: r1> R3, the pressure release mouth sets up to the circular smooth steady that can guarantee the pressure release.
As an improvement of the pressure relief structure of the present invention, the explosion-proof sealing gasket is a circle with a radius of R2, R1, R2 and R3 satisfy the following relation: r2> R1> R3, the explosion-proof sealed pad, the second explosion-proof sealing plate with the pressure release mouth all sets up to circular machining efficiency and the commonality that can improve pressure release structure.
As the utility model discloses an improvement of pressure release structure, the quantity of second explosion-proof sealing plate is one or more, works as when the quantity of second explosion-proof sealing plate is one, pressure release structure can be sandwich shape, works as when the quantity of second explosion-proof sealing plate is a plurality of, each the mode that the second explosion-proof sealing plate can be the array set up in explosion-proof sealed pad.
As the utility model discloses an improvement of pressure release structure, the thickness of first explosion-proof sealing plate is H1, the thickness of explosion-proof sealing pad is H2, the thickness of second explosion-proof sealing plate is H3, satisfies the relational expression: h1 is more than or equal to H3 is more than or equal to H2.
As the utility model discloses an improvement of pressure release structure, the melting point of first explosion-proof sealing plate is T1, the melting point of explosion-proof sealed pad is T2, the melting point of second explosion-proof sealing plate is T3, satisfies the relational expression: t1 is more than or equal to T3 and more than T2.
As an improvement of the pressure relief structure of the utility model, the explosion-proof sealing gasket has the tie coat, the tie coat can be located the sealed positive and negative two sides of explosion-proof sealing gasket, the explosion-proof sealing gasket is compound respectively under the hot pressing condition and is bonded to first explosion-proof closing plate with the explosion-proof closing plate of second.
As an improvement of the pressure relief structure of the present invention, the first explosion-proof sealing plate and the second explosion-proof sealing plate all have a metal layer, the first explosion-proof sealing plate and the second explosion-proof sealing plate can be made of hard metal.
The second purpose of the utility model is that: the battery shell comprises a mounting shell and the pressure relief structure, wherein the mounting shell is covered and sealed by the first explosion-proof sealing plate.
As an improvement of the battery housing of the present invention, the mounting case is a metal case.
The beneficial effects of the utility model reside in that: the pressure relief structure of the utility model comprises a first explosion-proof sealing plate, an explosion-proof sealing gasket and a second explosion-proof sealing plate which are sequentially superposed, wherein the first explosion-proof sealing plate is provided with a pressure relief opening, the explosion-proof sealing gasket is covered and seals the pressure relief opening, the second explosion-proof sealing plate is positioned at one side of the explosion-proof sealing gasket far away from the pressure relief opening, and the second explosion-proof sealing plate and the pressure relief opening are at least partially overlapped in the orthographic projection of the explosion-proof sealing gasket, wherein, the explosion-proof sealing gasket can stably release gas when the internal air pressure of the battery is overhigh or the temperature is overhigh, the first explosion-proof sealing plate and the second explosion-proof sealing plate both have good rigidity, can effectively prevent the phenomenon that the air pressure directly breaks through the battery shell when the internal air pressure of the battery is overhigh, and the second explosion-proof sealing plate has good protection effect on the explosion-proof sealing gasket, thereby prolonging the service life of the pressure relief structure, this pressure release structure can ensure that the pressure release of battery is stable high-efficient.
Drawings
Fig. 1 is one of the schematic structural diagrams of embodiment 1 of the present invention.
Fig. 2 is a second schematic structural diagram of embodiment 1 of the present invention.
Fig. 3 is an exploded view of embodiment 1 of the present invention.
Fig. 4 is a front view of embodiment 1 of the present invention.
Fig. 5 is a schematic structural diagram of embodiment 3 of the present invention.
Wherein: 1-a first explosion-proof sealing plate; 2-an explosion-proof sealing gasket; 3-a second explosion-proof sealing plate; 4-mounting the shell; 10-pressure relief port; 100-pressure relief area.
Detailed Description
As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In this application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings 1 to 5 and the specific embodiments, but the present invention is not limited thereto.
Example 1
A safety pressure relief structure is shown in figures 1-3 and comprises:
the first explosion-proof sealing plate 1 is provided with a pressure relief opening 10;
the anti-explosion sealing gasket 2 is overlapped on the first anti-explosion sealing plate 1, the anti-explosion sealing gasket 2 covers and seals the pressure relief opening 10, and the anti-explosion sealing gasket 2 covers the pressure relief opening 10 from the outer side of the first anti-explosion sealing plate 1, so that the anti-explosion sealing gasket 2 completely covers the pressure relief opening 10;
the second explosion-proof sealing plate 3 is overlapped on one side of the explosion-proof sealing gasket 2 far away from the pressure relief opening 10, wherein the second explosion-proof sealing plate 3 is at least partially overlapped with the pressure relief opening 10 in the orthographic projection of the explosion-proof sealing gasket 2, and the second explosion-proof sealing plate 3 is arranged corresponding to the pressure relief opening 10, so that the second explosion-proof sealing plate 3 has a certain protection effect on the explosion-proof sealing gasket 2.
The utility model discloses an among the pressure relief structure, second explosion-proof sealing plate 3 can wholly or partially superpose on the surface of explosion-proof sealed pad 2 to, second explosion-proof sealing plate 3 can fill up 2 orthographic projection at explosion-proof sealed, can fill up 2 orthographic projection partial overlap at explosion-proof sealed with pressure release mouth 10, also can all be located pressure release mouth 10 within 2 orthographic projection of explosion-proof sealed pad.
The utility model discloses an among the pressure release structure, as shown in FIG. 4, the explosion-proof sealed pad 2 of at least part embedding of second explosion-proof sealing plate 3, the explosion-proof sealed pad 2 of second explosion-proof sealing plate 3 does not run through, and simultaneously, the edge of pressure release mouth 10 and the explosion-proof sealing plate 3 encloses into pressure release area 100 on explosion-proof sealed pad 2, and pressure release area 100 can melt and discharge the inside gas of battery steadily high-efficiently under the high temperature. In practical arrangement, the shape and size of the pressure relief area 100 of the explosion-proof sealing gasket 2 can be set as required, and the shape of the pressure relief area 100 can be set to be annular, crescent or semicircular.
Preferably, the pressure relief port 10 is a circle with a radius of R1, and the second explosion-proof sealing plate 3 is a circle with a radius of R3, which satisfy the relation: r1> R3. Wherein, R3/R1 is more than or equal to 0.4 and less than 1, the circle centers of the pressure relief opening 10 and the second explosion-proof sealing plate 3 are superposed, in other words, the second explosion-proof sealing plate 3 can block the impact of the air pressure at the center of the pressure relief opening 10, and the pressure relief safety of the battery is ensured.
Preferably, the explosion-proof sealing gasket 2 is a circle with the radius of R2, and R1, R2 and R3 satisfy the relation: R2R 1R 3, wherein the value range of R3 can be 0.1-0.5 cm, 0.5-1 cm, 1-2 cm and 2-4 cm, the value range of R1 can be 0.2-0.6 cm, 0.6-1.25 cm, 1.25-2.2 cm and 2.2-4.25 cm, the value range of R2 can be 0.3-0.75 cm, 0.75-1.5 cm, 1.5-2.5 cm and 2.5-4.5 cm, and the pressure relief safety performance of the battery can be efficiently and flexibly adjusted by changing the values of R1, R2 and R3.
Preferably, the thickness of the first explosion-proof sealing plate 1 is H1, the thickness of the explosion-proof sealing gasket 2 is H2, and the thickness of the second explosion-proof sealing plate 3 is H3, which satisfy the relation: h1 is more than or equal to H3 is more than or equal to H2.
Specifically, the utility model discloses an among the pressure release structure, H1's value range can be 0.1mm ~ 0.3mm, 0.3mm ~ 0.6mm, 0.6mm ~ 1mm, 1mm ~ 2mm, H3's value range can be 0.1mm ~ 0.3mm, 0.3mm ~ 0.6mm, 0.6mm ~ 0.95mm, 0.95mm ~ 1.8mm, H2's value range can be 0.1mm ~ 0.3mm, 0.3mm ~ 0.6mm, 0.6mm ~ 0.9mm, 0.9mm ~ 1.6mm, through changing H1, H2, H3's value, can adjust the security performance of battery pressure release high-efficiently in a flexible way.
The utility model discloses an among the pressure release structure, the melting point of first explosion-proof sealing plate 1 is T1, and the melting point of explosion-proof sealed pad 2 is T2, and the melting point of second explosion-proof sealing plate 3 is T3, satisfies the relational expression: t1 is more than or equal to T3 and more than T2, wherein the value range of T2 can be 120-130 ℃, 130-140 ℃, 140-150 ℃, 150-160 ℃ and 160-170 ℃, and the battery can achieve the effect of high-efficiency pressure relief at different specific temperatures by selecting the anti-explosion sealing gaskets 2 with different melting points, and plays a certain role in safety monitoring on the temperature of the battery. Furthermore, the value ranges of T1 and T3 can be 600-1500 ℃.
Preferably, the explosion-proof sealing gasket 2 is provided with a bonding layer, the material of the explosion-proof sealing gasket 2 can be a plastic material, the plastic material can be bonded between the first explosion-proof sealing plate 1 and the second explosion-proof sealing plate 3 through a hot-pressing compounding method at a temperature which the explosion-proof sealing gasket 2 can bear, and the first explosion-proof sealing plate 1, the explosion-proof sealing gasket 2 and the second explosion-proof sealing plate 3 are sequentially stacked and bonded to form a sandwich structure. In practical application, the melting point of the plastic material can be adjusted by adjusting the component proportion of the plastic material, so that the melting point of the explosion-proof sealing gasket 2 is used as the switching temperature for the pressure relief of the battery.
Preferably, first explosion-proof sealing plate 1 and second explosion-proof sealing plate 3 all have the metal level, and the material of first explosion-proof sealing plate 1 and second explosion-proof sealing plate 3 can be the stainless steel, and first explosion-proof sealing plate 1 and second explosion-proof sealing plate 3 all have good rigidity, can effectively prevent the phenomenon that the battery shell is directly broken through to the inside atmospheric pressure that produces when the atmospheric pressure of battery is too high.
Example 2
Different from embodiment 1, the quantity of second explosion-proof sealing plate 3 sets up to a plurality ofly, and the quantity of second explosion-proof sealing plate 3 can be 2 ~ 8, and each second explosion-proof sealing plate 3 can be the mode of array and set up in explosion-proof sealed pad 2, for example can be the mode of ring array and set up in explosion-proof sealed pad 2 to can adjust the shape and the size in pressure release area 100 in a flexible way, and the high-efficient pressure release security performance who has adjusted the battery in a flexible way.
Other structures of this embodiment are the same as those of embodiment 1, and are not described herein again.
Example 3
A battery case, as shown in FIG. 5, includes a mounting case 4 and the pressure relief structure of any one of embodiments 1 to 2, and a first explosion-proof sealing plate 1 covers and seals the mounting case 4.
Wherein, the installation shell 4 of the battery shell can be a steel shell or a metal shell made of other materials, so that the battery shell at least has the following advantages: the width of the top and side edge seals is effectively reduced, the space utilization rate is increased, the energy density of the battery cell is higher, the safety is good, and the reliability of the battery cell in the limit environment is higher.
Example 4
A battery comprises the pressure relief structure of any one of embodiments 1-2, wherein the battery can be a lithium ion secondary battery monomer, a lithium ion primary battery monomer, a lithium sulfur battery monomer, a sodium lithium ion battery monomer, a sodium ion battery monomer, a magnesium ion battery monomer or the like, and the embodiment of the application is not limited to the above. In addition, the battery may be in a cylindrical shape, a flat body, a rectangular parallelepiped shape, or other shapes, which is not limited in the embodiments of the present application.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A safety pressure relief structure, comprising:
the first explosion-proof sealing plate (1), wherein the first explosion-proof sealing plate (1) is provided with a pressure relief opening (10);
the explosion-proof sealing gasket (2) is overlapped on the first explosion-proof sealing plate (1), and the explosion-proof sealing gasket (2) covers and seals the pressure relief opening (10);
the second explosion-proof sealing plate (3) is superposed on one side, far away from the pressure relief opening (10), of the explosion-proof sealing gasket (2);
the second explosion-proof sealing plate (3) and the pressure relief opening (10) are at least partially overlapped in the orthographic projection of the explosion-proof sealing gasket (2).
2. The safety relief structure of claim 1, wherein: at least part of the second explosion-proof sealing plate (3) is embedded into the explosion-proof sealing gasket (2), and the pressure relief opening (10) and the edge of the second explosion-proof sealing plate (3) are arranged on the explosion-proof sealing gasket (2) to form a pressure relief area (100).
3. The safety pressure relief structure according to claim 1 or 2, wherein: the pressure relief opening (10) is a circle with the radius of R1, the second explosion-proof sealing plate (3) is a circle with the radius of R3, and the relation is satisfied: r1> R3.
4. The safety relief structure according to claim 3, wherein: the explosion-proof sealing gasket (2) is a circle with the radius of R2, and the R1, the R2 and the R3 satisfy the relation: r2> R1> R3.
5. The safety pressure relief structure according to claim 1 or 2, wherein: the number of the second explosion-proof sealing plates (3) is one or more.
6. The safety pressure relief structure according to claim 1 or 2, wherein: the thickness of the first explosion-proof sealing plate (1) is H1, the thickness of the explosion-proof sealing gasket (2) is H2, the thickness of the second explosion-proof sealing plate (3) is H3, and the relation is satisfied: h1 is more than or equal to H3 is more than or equal to H2.
7. The safety pressure relief structure according to claim 1 or 2, wherein: the melting point of the first explosion-proof sealing plate (1) is T1, the melting point of the explosion-proof sealing gasket (2) is T2, the melting point of the second explosion-proof sealing plate (3) is T3, and the relation is satisfied: t1 is more than or equal to T3 and more than T2.
8. The safety pressure relief structure according to claim 1 or 2, wherein: the explosion-proof sealing gasket (2) is provided with an adhesive layer.
9. The safety pressure relief structure according to claim 1 or 2, wherein: the first explosion-proof sealing plate (1) and the second explosion-proof sealing plate (3) are both provided with metal layers.
10. A battery case, characterized in that: the pressure relief structure comprises a mounting shell (4) and the pressure relief structure according to any one of claims 1 to 9, wherein the first explosion-proof sealing plate (1) covers and seals the mounting shell (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019194.6U CN217522178U (en) | 2022-04-29 | 2022-04-29 | Safe pressure relief structure and battery shell with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019194.6U CN217522178U (en) | 2022-04-29 | 2022-04-29 | Safe pressure relief structure and battery shell with same |
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| Publication Number | Publication Date |
|---|---|
| CN217522178U true CN217522178U (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221019194.6U Active CN217522178U (en) | 2022-04-29 | 2022-04-29 | Safe pressure relief structure and battery shell with same |
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| CN (1) | CN217522178U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117438734A (en) * | 2023-11-24 | 2024-01-23 | 宁德新能源科技有限公司 | Shell, battery core and electric equipment |
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2022
- 2022-04-29 CN CN202221019194.6U patent/CN217522178U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117438734A (en) * | 2023-11-24 | 2024-01-23 | 宁德新能源科技有限公司 | Shell, battery core and electric equipment |
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