CN219759864U - Pressure release valve of battery top cover, battery and electricity utilization device - Google Patents
Pressure release valve of battery top cover, battery and electricity utilization device Download PDFInfo
- Publication number
- CN219759864U CN219759864U CN202320939817.XU CN202320939817U CN219759864U CN 219759864 U CN219759864 U CN 219759864U CN 202320939817 U CN202320939817 U CN 202320939817U CN 219759864 U CN219759864 U CN 219759864U
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- pressure relief
- top cover
- cylinder
- battery
- column body
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- 230000005611 electricity Effects 0.000 title description 2
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000006837 decompression Effects 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 26
- 229910052744 lithium Inorganic materials 0.000 abstract description 26
- 239000007789 gas Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 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
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to the technical field of batteries, in particular to a pressure release valve of a battery top cover, a battery and an electric device; wherein the relief valve includes: the column body is used for penetrating through the pressure relief hole of the top cover and can move up and down relative to the pressure relief hole; the sealing gasket is arranged at the upper end of the column body and is used for abutting against the top surface of the top cover to seal the pressure relief hole; the elastic piece is arranged at the lower end of the column body and is used for abutting against the bottom surface of the top cover; the pressure relief groove is arranged on the circumferential side face of the cylinder, and the height H of the pressure relief groove is greater than the thickness T of a top cover for installing the pressure relief valve. When the internal pressure of the lithium battery is greater than the elastic force of the elastic piece, the cylinder is forced to move upwards, gas in the lithium battery is discharged through the pressure relief groove, when the internal pressure is lower than the elastic force of the elastic piece after gas is discharged, the cylinder moves downwards to reset, and the sealing gasket covers the pressure relief hole of the top cover again. The pressure release valve can be repeatedly used after being installed, is convenient and controllable, has high degree of automation, and can prolong the service life of the lithium battery.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a pressure release valve of a battery top cover, a battery and an electric device.
Background
With the rapid development of science and technology, the mileage requirement of people on lithium batteries is higher and higher, so that high-nickel ternary materials are more and more concerned and used; however, as the content of nickel increases, the lithium battery generates more and more gas in the charging and discharging process, so that the internal pressure of the lithium battery is increased, if the gas is not removed in time, the lithium battery can bulge to a certain degree and burst, and unnecessary potential safety hazards are caused. At present, in order to pursue high safety performance, most companies often adopt ternary materials with low proportion and electrolyte with low gas production to alleviate and reduce gas production in a lithium battery, but a part of capacity is affected, and the problem of gas pressure cannot be fundamentally solved.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the pressure relief valve for the battery top cover, which can automatically discharge the air pressure in the lithium battery without affecting the capacity of the lithium battery and prolong the service life of the lithium battery.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a pressure relief valve for a battery top cap comprising:
the column body is used for penetrating through the pressure relief hole of the top cover and can move up and down relative to the pressure relief hole;
the sealing gasket is arranged at the upper end of the column body and is used for abutting against the top surface of the top cover to seal the pressure relief hole;
the elastic piece is arranged at the lower end of the column body and is used for abutting against the bottom surface of the top cover;
the pressure relief groove is formed in the circumferential side face of the cylinder and located between the sealing gasket and the elastic piece, and the height H of the pressure relief groove is larger than the thickness T of the top cover of the pressure relief valve.
Preferably, an upper cover plate is arranged at the upper end of the column body, and the sealing gasket is positioned on the lower side surface of the upper cover plate and fixedly connected with the upper cover plate. The sealing gasket is provided with a through hole for the column body to pass through, the sealing gasket is fixedly connected with the column body and the upper cover plate, the sealing gasket is in contact connection with the top surface of the top cover, and the sealing gasket leaves and abuts against the top surface of the top cover along with the up-and-down movement of the column body. When sealing gasket butt top cap top surface, sealing gasket is located between upper cover plate and the top cap top surface, and upper cover plate fine provides down force in order to let sealing gasket seal the pressure release hole more closely.
Preferably, the elastic piece is a spring, the elastic piece is sleeved on the column body, one end of the elastic piece is fixedly connected with the column body, and the other end of the elastic piece is used for being abutted to the bottom surface of the top cover. The spring is preferably a high-pressure spring, one end of the spring is connected with the column body through welding, and the other end of the spring is used for abutting against the bottom surface of the top cover.
Preferably, the lower end of the cylinder is provided with a lower cover plate, the elastic piece is a spring, the elastic piece is sleeved on the cylinder, one end of the elastic piece is abutted to the lower cover plate, and the other end of the elastic piece is used for being abutted to the bottom surface of the top cover. The spring is sleeved on the column body, one end of the spring is abutted against the lower cover plate, and the other end of the spring is abutted against the bottom surface of the top cover; the lower cover plate bears a spring which is not required to be fixedly connected with the column body.
Preferably, a lower cover plate is arranged at the lower end of the column body, and the elastic piece is fixed on the upper side surface of the lower cover plate and a plurality of elastic pieces are arranged around the column body at intervals. The elastic pieces can be arranged as springs or elastic plastic pieces, the space between two adjacent elastic pieces is used for allowing air to flow through, and the elastic pieces are matched with each other to provide space for upward movement of the column body and provide force for resetting of the column body. When the spring is adopted, the spring can be welded with the lower cover plate; when the elastic plastic part is adopted, the elastic plastic part can be bonded with the lower cover plate.
Preferably, the cylinder and the lower cover plate are integrally formed or split. The integral forming structure has higher strength; the split type is convenient for production and assembly.
Preferably, the pressure relief grooves are arranged in one way, and the pressure relief grooves occupy a local area of the circumferential side surface of the cylinder or cover the circumferential side surface of the cylinder. When the pressure relief groove is arranged to be one and only occupies part of the area of the circumferential side surface of the cylinder, the pressure relief groove can realize gas discharge and ensure the tightness of the pressure relief valve. When the pressure relief groove is arranged as one and covers the circumferential side surface of the cylinder, the effect of discharging gas speed is better.
Preferably, the pressure relief grooves are provided in plurality, and the plurality of pressure relief grooves are arranged at intervals along the circumferential side surface of the cylinder. The plurality of pressure relief grooves are arranged on the circumferential side face of the cylinder at intervals, so that gas emission can be realized, and the tightness of the pressure relief valve is guaranteed to a certain extent.
Another object of the present utility model is to provide a battery, which includes the above pressure relief valve.
The third object of the present utility model is to provide an electric device, which includes the pressure release valve.
The utility model has the beneficial effects that:
the utility model provides a pressure relief valve of a battery top cover, which replaces an explosion-proof valve in a traditional lithium battery top cover by the pressure relief valve, wherein when the internal pressure of the lithium battery is larger than the elastic force of the elastic member, a cylinder is forced to move upwards, so that the upper end surface of the pressure relief groove is higher than the top surface of the top cover to further communicate the interior of the lithium battery with the outside, gas in the lithium battery is discharged through the pressure relief groove, and when the internal pressure is lower than the elastic force of the elastic member after the gas is discharged, the cylinder moves downwards to reset, and a sealing gasket covers a pressure relief hole of the top cover again. The pressure release valve can be repeatedly used after being installed, is convenient and controllable, has high degree of automation, and can prolong the service life of the lithium battery. Meanwhile, the elastic piece is arranged on the inner side of the lithium battery, so that the installation of the pressure release valve is simplified and facilitated. Still the relief valve is compared on the market and is set up the cylinder into cavity with the exhaust scheme, and the cylinder intensity of this scheme is obviously higher, effectively avoids by the inside atmospheric pressure deformation's of lithium cell condition.
Drawings
Fig. 1 is a schematic sectional view of a side structure of a first embodiment of the present utility model.
Fig. 2 is a schematic cross-sectional view of a side structure of a first embodiment of the present utility model.
Fig. 3 is a schematic sectional view of a side structure of a second embodiment of the present utility model.
Fig. 4 is a schematic cross-sectional view of a side structure of a third embodiment of the present utility model.
Detailed Description
The utility model will be further illustrated by the following examples, which are not intended to limit the scope of the utility model, in order to facilitate the understanding of those skilled in the art.
At present, in order to pursue high safety performance, most companies often adopt ternary materials with low proportion and electrolyte with low gas production to alleviate and reduce gas production in a lithium battery, but a part of capacity is affected, and the problem of gas pressure cannot be fundamentally solved.
In order to solve the above-described problems, the inventors conceived a technical solution of the first embodiment.
Embodiment one:
as shown in fig. 1 to 2, a pressure release valve for a battery top cover includes:
the column body 1 is used for penetrating through the pressure relief hole of the top cover and can move up and down relative to the pressure relief hole;
the sealing gasket 2 is arranged at the upper end of the column body 1 and is used for abutting against the top surface of the top cover to seal the pressure relief hole;
the elastic piece 3 is arranged at the lower end of the column body 1 and is used for abutting against the bottom surface of the top cover;
the pressure relief groove 4 is formed in the circumferential side face of the cylinder 1 and located between the sealing gasket 2 and the elastic piece 3, and the height H of the pressure relief groove 4 is larger than the thickness T of the top cover of the pressure relief valve.
According to the embodiment, the pressure relief valve replaces an explosion-proof valve in a traditional lithium battery top cover, the pressure relief valve utilizes the pressure relief groove 4 and the elastic piece 3, when the internal pressure of the lithium battery is larger than the elastic force of the elastic piece 3, the cylinder 1 is forced to move upwards, so that the upper end face of the pressure relief groove 4 is higher than the top face of the top cover, the internal of the lithium battery is further communicated with the outside, gas in the lithium battery is discharged through the pressure relief groove 4, after the gas is discharged, when the internal pressure is lower than the elastic force of the elastic piece 3, the cylinder 1 moves downwards to reset, and the sealing gasket 2 covers the pressure relief hole of the top cover again. The pressure release valve can be repeatedly used after being installed, is convenient and controllable, has high degree of automation, and can prolong the service life of the lithium battery. Meanwhile, the elastic piece 3 is arranged on the inner side of the lithium battery, so that the installation of the pressure release valve is simplified and facilitated. Still the relief valve is compared on the market and is set up cylinder 1 as cavity with the exhaust scheme, and cylinder 1 intensity of this scheme is obviously higher, effectively avoids by the inside atmospheric pressure deformation's of lithium cell condition.
In this embodiment, an upper cover plate 11 is disposed at the upper end of the column 1, and the sealing gasket 2 is located on the lower side surface of the upper cover plate 11 and is fixedly connected with the upper cover plate 11. The sealing gasket 2 is provided with a through hole for the column 1 to pass through, the sealing gasket 2 is fixedly connected with the column 1 and the upper cover plate 11, the sealing gasket 2 is in contact connection with the top surface of the top cover, and the sealing gasket 2 leaves and abuts against the top surface of the top cover along with the up-and-down movement of the column 1. When the sealing gasket 2 abuts against the top surface of the top cover, the sealing gasket 2 is located between the upper cover plate 11 and the top surface of the top cover, and the upper cover plate 11 well provides downward pressure to enable the sealing gasket 2 to seal the pressure relief hole more tightly.
In this embodiment, the lower end of the cylinder 1 is provided with a lower cover plate 12, the elastic element 3 is a spring, the elastic element 3 is sleeved on the cylinder 1, one end of the elastic element 3 abuts against the lower cover plate 12, and the other end of the elastic element 3 is used for abutting against the bottom surface of the top cover. The spring is sleeved on the column body 1, one end of the spring is abutted against the lower cover plate 12, and the other end of the spring is abutted against the bottom surface of the top cover; the lower cover plate 12 receives a spring which can provide space for the upward movement of the column 1 and force for the return of the column 1.
In this embodiment, the column 1 and the lower cover 12 are integrally formed or separately disposed. The integral forming structure has higher strength; the split type is convenient for production and assembly. To achieve the same effect, the column 1 and the upper cover 11 described above may be integrally formed or separately formed.
In this embodiment, the pressure relief grooves 4 are provided in one piece, and the pressure relief grooves 4 cover the circumferential side surface of the cylinder 1. The pressure relief groove 4 is provided as one and covers the circumferential side of the cylinder 1, so that the effect of gas discharge speed is better. Meanwhile, the inventor further conceived that the pressure relief groove 4 occupies a partial area of the circumferential side surface of the cylinder 1, and when the pressure relief groove 4 is arranged to occupy only a partial area of the circumferential side surface of the cylinder 1, the pressure relief groove can realize gas discharge and ensure the tightness of the pressure relief valve.
The inventors have also conceived modified embodiments based on the first embodiment, in particular as follows.
Embodiment two:
as shown in fig. 3, the second embodiment is different from the first embodiment in that: the elastic piece 3 is a high-pressure spring, the elastic piece 3 is sleeved on the column 1, one end of the elastic piece 3 is fixedly connected with the column 1, and the other end of the elastic piece 3 is used for being abutted to the bottom surface of the top cover. The lower end of the cylinder 1 of the embodiment is not provided with the lower cover plate 12, the lower end of the spring is fixedly connected with the lower end of the main body in a direct welding mode, the upper end of the spring is abutted to the bottom surface of the top cover, the compression of the spring can be realized, the cylinder 1 has enough upward movement space, and the spring can provide enough force to move the cylinder 1 downwards.
Embodiment III:
as shown in fig. 4, the third embodiment is different from the foregoing embodiment in that: the lower end of the column body 1 is provided with a lower cover plate 12, and the elastic piece 3 is fixed on the upper side surface of the lower cover plate 12 and is provided with a plurality of elastic pieces around the column body 1 at intervals. In this embodiment, the lower cover plate 12 is disposed at the lower end of the column 1, but the elastic members 3 are not spring-sleeved with the column 1, but are disposed around the column 1 with a plurality of springs or elastic plastic members spaced apart, the spacing gap between two adjacent elastic members 3 is used for gas to flow through, and the plurality of elastic members 3 cooperate with each other to provide space for upward movement of the column 1 and force for resetting the column 1. When a spring is adopted, the lower cover plate 12 can be welded; and when an elastic plastic piece is adopted, the elastic plastic piece can be adhered to the lower cover plate 12.
Embodiment four:
the fourth embodiment is different from the foregoing embodiment in that: the pressure relief grooves 4 are provided in plurality, and the plurality of pressure relief grooves 4 are arranged at intervals along the circumferential side surface of the cylinder 1. The plurality of pressure relief grooves 4 are arranged on the circumferential side surface of the cylinder 1 at intervals, so that gas emission can be realized, and the tightness of the pressure relief valve is ensured to a certain extent. The design that a plurality of pressure release grooves 4 interval were arranged is adopted in this embodiment, gets the compromise effect between realizing high-efficient exhaust and the leakproofness of guarantee relief valve.
Fifth embodiment:
a battery comprising the pressure release valve of any one of embodiments one to four; other constructions of the battery are similar to the existing battery, and mainly the pressure release hole of the top cover is provided with the pressure release valve in any one of the first to fourth embodiments.
Example six:
an electric device comprising the pressure release valve according to any one of the first to fourth embodiments, wherein the electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the utility model does not limit the electric device in particular.
In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific scope of protection of the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" or "a second" feature may explicitly or implicitly include one or more such feature, and in the description of the utility model, the meaning of "a number" is two or more, unless otherwise specifically defined.
In the present utility model, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The above examples merely represent several embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The decompression valve of battery top cap, its characterized in that includes:
the column body (1) is used for penetrating through the pressure relief hole of the top cover and can move up and down relative to the pressure relief hole;
the sealing gasket (2) is arranged at the upper end of the column body (1) and is used for abutting against the top surface of the top cover to seal the pressure relief hole;
the elastic piece (3) is arranged at the lower end of the column body (1) and is used for abutting against the bottom surface of the top cover;
the pressure relief groove (4) is formed in the circumferential side face of the cylinder (1) and located between the sealing gasket (2) and the elastic piece (3), and the height H of the pressure relief groove (4) is larger than the thickness T of the top cover of the pressure relief valve.
2. The battery top cover pressure relief valve of claim 1, wherein: the upper end of the cylinder (1) is provided with an upper cover plate (11), and the sealing gasket (2) is positioned on the lower side surface of the upper cover plate (11) and fixedly connected with the upper cover plate (11).
3. The battery top cover pressure relief valve of claim 1, wherein: the elastic piece (3) is a spring, the elastic piece (3) is sleeved on the column body (1), one end of the elastic piece (3) is fixedly connected with the column body (1), and the other end of the elastic piece (3) is used for being abutted to the bottom surface of the top cover.
4. The battery top cover pressure relief valve of claim 1, wherein: the lower extreme of cylinder (1) is provided with apron (12) down, elastic component (3) are the spring, elastic component (3) suit in cylinder (1), the one end butt of elastic component (3) apron (12) down, the other end of elastic component (3) is used for the bottom surface of butt top cap.
5. The battery top cover pressure relief valve of claim 1, wherein: the lower end of the column body (1) is provided with a lower cover plate (12), and the elastic piece (3) is fixed on the upper side surface of the lower cover plate (12) and is provided with a plurality of elastic pieces around the column body (1) at intervals.
6. The battery top cover pressure relief valve according to any one of claims 4 or 5, wherein: the cylinder (1) and the lower cover plate (12) are integrally formed or are arranged in a split mode.
7. The battery top cover pressure relief valve of claim 1, wherein: the pressure relief grooves (4) are arranged in one way, and the pressure relief grooves (4) occupy a local area of the circumferential side surface of the cylinder (1) or cover the circumferential side surface of the cylinder (1).
8. The battery top cover pressure relief valve of claim 1, wherein: the pressure relief grooves (4) are arranged in a plurality, and the pressure relief grooves (4) are arranged at intervals along the circumferential side surface of the cylinder (1).
9. A battery, characterized in that: comprising a pressure relief valve according to any one of claims 1 to 8.
10. The power utilization device is characterized in that: comprising a pressure relief valve according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320939817.XU CN219759864U (en) | 2023-04-24 | 2023-04-24 | Pressure release valve of battery top cover, battery and electricity utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320939817.XU CN219759864U (en) | 2023-04-24 | 2023-04-24 | Pressure release valve of battery top cover, battery and electricity utilization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759864U true CN219759864U (en) | 2023-09-26 |
Family
ID=88073682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320939817.XU Active CN219759864U (en) | 2023-04-24 | 2023-04-24 | Pressure release valve of battery top cover, battery and electricity utilization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759864U (en) |
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2023
- 2023-04-24 CN CN202320939817.XU patent/CN219759864U/en active Active
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