CN221304913U - Battery cover plate - Google Patents
Battery cover plate Download PDFInfo
- Publication number
- CN221304913U CN221304913U CN202322848988.4U CN202322848988U CN221304913U CN 221304913 U CN221304913 U CN 221304913U CN 202322848988 U CN202322848988 U CN 202322848988U CN 221304913 U CN221304913 U CN 221304913U
- Authority
- CN
- China
- Prior art keywords
- pressure release
- release valve
- way pressure
- battery cover
- way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 5
- -1 polyethylene Polymers 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004626 polylactic acid Substances 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000007788 liquid 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
- 239000000178 monomer Substances 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses a battery cover plate, and relates to a battery cover capable of relieving pressure. The anti-explosion valve is arranged on the plate body in a sealing way, and aims to solve the problem that the anti-explosion valve cannot be opened when the internal pressure of a battery is smaller than 0.8Mpa, so that the battery shell is deformed; the device also comprises a reticular one-way pressure release valve; the net-shaped one-way pressure release valve is arranged on the plate body in a sealing way, and an inlet and an outlet of the net-shaped one-way pressure release valve are respectively positioned on two sides of the plate body; the net-shaped one-way pressure release valve is a high polymer three-dimensional net-shaped body with micropores; the aperture of the micropore in the reticular one-way pressure release valve is 0.1-5 um.
Description
Technical Field
The utility model relates to a battery cover capable of relieving pressure.
Background
An explosion-proof valve is arranged right above the existing aluminum-shell battery cover plate, and can rupture to release pressure when the internal pressure of the battery reaches 0.8+/-0.15 Mpa, so that the explosion of the battery caused by the overlarge internal pressure is prevented.
However, when the internal pressure of the battery is less than 0.8Mpa, the explosion-proof valve is not opened, and the internal pressure of the battery is large enough to deform the battery case, that is, the middle position of the battery case protrudes to the outer sides of the two sides, so that the battery is bulged and deformed, and the performance is reduced or even scrapped.
Disclosure of utility model
The utility model aims to solve the problem that an explosion-proof valve cannot be opened when the internal pressure of a battery is smaller than 0.8Mpa, so that a battery shell is deformed.
The utility model relates to a battery cover plate, which comprises an explosion-proof valve and a plate body, wherein the explosion-proof valve is hermetically arranged on the plate body;
the hydraulic pressure control valve is characterized by further comprising a netlike one-way pressure release valve;
The net-shaped one-way pressure release valve is arranged on the plate body in a sealing way, and an inlet and an outlet of the net-shaped one-way pressure release valve are respectively positioned on two sides of the plate body;
The net-shaped one-way pressure release valve is a high polymer three-dimensional net-shaped body with micropores;
the aperture of the micropore in the reticular one-way pressure release valve is 0.1-5 um.
The beneficial effects of the utility model are as follows:
The utility model adds a net-shaped one-way pressure release valve on the basis of the existing cover plate, and the net-shaped one-way pressure release valve only allows the gas inside the battery to leak to the outside of the battery, but does not allow the gas outside the battery to enter the battery. When the internal pressure of the battery reaches 0.25Mpa or more, the gas is discharged to the outside of the battery through the one-way valve, so that the internal pressure of the battery is reduced, the deformation of the shell caused by the overlarge internal pressure of the battery is prevented, and the appearance of the battery is always kept in a flatter state.
Drawings
FIG. 1 is a schematic top view of a battery cover plate according to the present utility model;
FIG. 2 is a schematic diagram of a mesh-type one-way pressure relief valve in a battery cover plate according to the present utility model;
fig. 3 is a schematic diagram of a matching structure of a mesh-shaped unidirectional pressure release valve and an elastic film in a battery cover plate according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Detailed description of the preferred embodiments
The battery cover plate comprises an explosion-proof valve 1 and a plate body 4, wherein the explosion-proof valve 1 is arranged on the plate body 4 in a sealing way; the device also comprises a reticular one-way pressure release valve 2;
The reticular one-way pressure release valve 2 is arranged on the plate body 4 in a sealing way, and an inlet and an outlet of the reticular one-way pressure release valve 2 are respectively positioned at two sides of the plate body 4;
the reticular unidirectional pressure release valve 2 is a high molecular polymer three-dimensional reticular body with micropores;
The pore diameter of the micropores in the reticular unidirectional pressure release valve 2 is 0.1-5 um.
Specifically, in this embodiment, a mesh-shaped one-way pressure release valve 2 is added on the basis of the conventional cover plate, and the mesh-shaped one-way pressure release valve 2 only allows the gas inside the battery to leak to the outside of the battery, but does not allow the gas outside the battery to enter the inside of the battery. When the internal pressure of the battery reaches a certain pressure or above, the gas is discharged to the outside of the battery through the one-way valve, so that the internal pressure of the battery is reduced, the deformation of the shell caused by the overlarge internal pressure of the battery is prevented, and the appearance of the battery is always kept in a flatter state. The position and the shape of the net-shaped one-way pressure release valve 2 on the cover plate are shown in figure 1.
The net-shaped one-way pressure release valve 2 and the cover plate are integrated together to form an organic whole, and the net-shaped one-way pressure release valve 2 and the cover plate are tightly combined together, so that the sealing performance is good, and no gas leakage exists. As shown in fig. 2, the structure of the mesh-type one-way pressure release valve 2 is a three-dimensional mesh body, which means that it not only takes on a mesh structure on a plane, but also forms a three-dimensional structure in a three-dimensional space. The pressure relief valve has the characteristics of multiple layers and multiple channels, and is beneficial to enhancing the performance of the pressure relief valve.
The reticular one-way pressure release valve 2 is synthesized by a high polymer material, and the material forms a good copolymer by selecting proper monomers, initiator, adjusting parameters such as synthesis temperature, synthesis pressure and the like in the synthesis process; meanwhile, the synthesis conditions are adjusted, so that groups which do not participate in polymerization on a main chain form an ordered isotactic structure on a high polymer chain, the structure can improve the crystallinity of the material, and the ordered molecular structure can also form a three-dimensional reticular three-dimensional structure, thereby achieving the aim of water resistance and ventilation.
Detailed description of the preferred embodiments
The present embodiment is further described with respect to the first embodiment, in which the mesh-shaped one-way pressure release valve 2 includes a plurality of microporous mesh layers 2-1, and the plurality of microporous mesh layers 2-1 are laminated and fixed;
the thickness of each microporous net layer 2-1 is 100 mu m-2 mm, and the interval between two adjacent microporous net layers 2-1 is 10 mu m-150 mu m.
Other technical features of the present embodiment are exactly the same as those of the first embodiment.
Specifically, the diameter of the micropores of the high polymer material is between 0.1 and 5um, the diameter of the gas molecules in the battery is about 0.001um, and the aperture of the high polymer material is 100 to 5000 times that of the gas molecules, so that the gas molecules can freely pass through, and the diameters of the water drops and the aggregated water are more than 500um, and are about hundreds of times larger than that of the high polymer material. The micropores with the size of only about one ten thousandth of the diameter of the water drop can prevent moisture, dirt and dust from entering the polymer film, reduce the internal pressure of the battery by freely discharging electric internal gas to the sealed shell, and simultaneously prevent external moisture from entering the battery. Thereby playing the roles of unidirectional pressure relief and water resistance.
The laminated and fixed structure of the multi-layer microporous mesh layer 2-1 ensures the stable position and shape of the microporous mesh layers, thereby maintaining the performance of the one-way pressure release valve. This helps to prevent loosening or shifting of the microporous mesh layer, ensuring its proper functioning.
Detailed description of the preferred embodiments
This embodiment is a further description of the second embodiment, in which the porosity of the mesh-like one-way pressure release valve 2 is 30 to 70%.
Other technical features of the present embodiment are exactly the same as those of the second embodiment.
Detailed description of the preferred embodiments
This embodiment is further described with respect to the first, second or third embodiment, in which the cross section of the mesh-like one-way pressure release valve 2 is a square having a side length of 1 to 2mm or a circular shape having a diameter of 1 to 2 mm.
Other technical features of the present embodiment are exactly the same as those of the fourth embodiment.
In particular, the cross-section determines the size of the inlet and outlet.
The actual inlet and outlet diameters will be adjusted according to the requirements of the particular application. The size and ratio of inlet and outlet diameters can affect the fluid or gas throughput rate, pressure drop, and filtration efficiency. Therefore, engineering calculations and experiments based on prior art in the field are needed to determine the most suitable parameter values.
Detailed description of the preferred embodiments
This embodiment is a further explanation of the second or third embodiment, and further includes an elastic film 3;
The elastic film 3 is integrally formed inside the netlike one-way pressure release valve 2 and is positioned between two adjacent microporous netlike layers 2-1; and the elastic film 3 covers all micropores on two sides of the elastic film;
The elastic film 3 is formed by sealing and splicing a plurality of film petals 3-1; the membrane flap 3-1 is polygonal, and one side of the membrane flap 3-1 is fixed with the reticular one-way pressure release valve 2.
Other technical features of the present embodiment are exactly the same as those of the second or third embodiment.
Specifically, as shown in FIG. 3, the elastic film 3 is located between two adjacent microporous web layers 2-1, and serves as a pressure sensor. When the internal pressure of the cell reaches a certain threshold value (for example, 0.25Mpa and above), the pressure will be transmitted to the elastic film 3 through the microporous mesh layer. One side of a plurality of membrane flaps 3-1 on the elastic membrane 3 is fixed with the reticular one-way pressure release valve 2. When the internal pressure of the battery increases, the membrane flap 3-1 will be deformed by the pressure, lifted off the microporous mesh layer 2-1, allowing the gas to pass through and be released to the outside.
The micropores of the elastic film 3 on both sides of the elastic film are covered completely, and the sealing state of the microporous net layer is maintained when the elastic film is not lifted, so that external air is prevented from entering the inside of the battery. Only when the internal pressure rises, the elastic film 3 can be opened, and the function of unidirectional pressure relief is realized.
While the shape of the membrane flap 3-1 is generally polygonal, providing a uniform pressure distribution, making the membrane more flexible and responsive to pressure changes.
Detailed description of the preferred embodiments six
In this embodiment, the elastic modulus of the elastic film 3 is 0.1 to 0.5GPa and the thickness is 20 μm; thereby allowing the elastic film 3 to open at a pressure of 0.25 MPa.
Other technical features of the present embodiment are exactly the same as those of the fifth embodiment.
Specifically, the meshed one-way pressure release valve 2 and the explosion-proof valve are matched together for use. When the internal pressure of the battery reaches 0.25Mpa and is not yet 0.8Mpa, the net-shaped one-way pressure release valve 2 preferentially starts to work, gas in the battery is discharged to the outside of the battery, when the internal pressure of the battery reaches 0.8Mpa or is accumulated to reach 0.8Mpa in a short time, the pressure release capability of the net-shaped one-way pressure release valve 2 is limited, the internal pressure cannot be released in a short time, and then the explosion-proof valve starts to work. However, once the explosion-proof valve begins to work, the battery is scrapped and cannot be used continuously. So that the explosion-proof valve is opened to prevent the internal pressure of the battery from accumulating to 0.8Mpa, it is necessary to timely discharge the internal pressure of the battery through the net-shaped one-way pressure release valve 2.
On the other hand, based on the prior art in the field, the elastic film 3 can be deformed under a set pressure by selecting a proper elastic modulus and thickness of the elastic film 3.
The elastic modulus and thickness of the elastic film in this embodiment are selected from polyethylene.
Detailed description of the preferred embodiments
The present embodiment is further described in the fifth embodiment, and in the present embodiment, the mesh-shaped one-way pressure release valve 2 is a three-dimensional mesh-shaped body made of polyethylene, polypropylene, or polyvinyl chloride.
Other technical features of the present embodiment are exactly the same as those of the fifth embodiment.
Specifically, the main body of the reticular one-way pressure release valve 2 is made of high polymer materials such as polyethylene, polypropylene or polyvinyl chloride. Because of excellent chemical stability, mechanical strength and corrosion resistance, the modified polyurethane is suitable for a plurality of application environments.
Because high polymer materials such as polyethylene, polypropylene or polyvinyl chloride generally have good waterproof performance, the reticular one-way pressure release valve 2 made of the materials can effectively prevent liquid water or moisture from entering the battery or other closed systems. Polyethylene, polypropylene or polyvinylchloride generally have good resistance to many chemicals and therefore they can be used in different environments without being affected by chemical corrosion, especially in the case of chemical batteries. And generally has sufficient mechanical stability to withstand pressure and temperature variations over a range, thereby ensuring reliability and durability of the pressure relief valve.
Detailed description of the preferred embodiments
In this embodiment, the elastic film 3 is made of polyurethane, polycarbonate or polylactic acid.
Other technical features of the present embodiment are exactly the same as those of the sixth or seventh embodiment.
Specifically, the elastic film 3 is made of a polymer material such as polyurethane, polycarbonate, or polylactic acid. Has good elasticity and flexibility, and can be quickly restored to original state when being subjected to external pressure or deformation. And generally has good corrosion resistance and can be used in different environments without being damaged by chemicals.
Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present utility model. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present utility model as defined by the appended claims. It should be understood that the different dependent claims and the features herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other embodiments.
Claims (8)
1. The battery cover plate comprises an explosion-proof valve (1) and a plate body (4), wherein the explosion-proof valve (1) is arranged on the plate body (4) in a sealing way;
the hydraulic pressure control valve is characterized by further comprising a netlike one-way pressure release valve (2);
The reticular one-way pressure release valve (2) is arranged on the plate body (4) in a sealing way, and an inlet and an outlet of the reticular one-way pressure release valve (2) are respectively positioned at two sides of the plate body (4);
The reticular unidirectional pressure release valve (2) is a high polymer three-dimensional reticular body with micropores;
The aperture of the micropore in the reticular one-way pressure release valve (2) is 0.1-5 um.
2. A battery cover plate according to claim 1, wherein the mesh-like one-way pressure release valve (2) comprises a plurality of microporous mesh layers (2-1), and the plurality of microporous mesh layers (2-1) are laminated and fixed;
the thickness of each microporous net layer (2-1) is 100 mu m-2 mm, and the interval between every two adjacent microporous net layers (2-1) is 10 mu m-150 mu m.
3. A battery cover according to claim 2, characterized in that the porosity of the reticulated one-way pressure relief valve (2) is 30-70%.
4. A battery cover plate according to claim 1, 2 or 3, characterized in that the cross section of the net-shaped one-way pressure release valve (2) is square with side length of 1-2 mm or round with diameter of 1-2 mm.
5. A battery cover plate according to claim 2 or 3, further comprising an elastic film (3);
The elastic film (3) is integrally formed inside the netlike one-way pressure release valve (2) and is positioned between two adjacent microporous netlike layers (2-1); and the elastic film (3) covers all micropores on two side surfaces of the elastic film;
the elastic film (3) is formed by sealing and splicing a plurality of film petals (3-1); the membrane flap (3-1) is polygonal, and one side of the membrane flap (3-1) is fixed with the reticular one-way pressure release valve (2).
6. A battery cover plate according to claim 5, characterized in that the elastic modulus of the elastic film (3) is 0.1-0.5 GPa and the thickness is 20 μm; thereby allowing the elastic film (3) to open at a pressure of 0.25 MPa.
7. The battery cover plate according to claim 5, wherein the net-shaped one-way pressure release valve (2) is a three-dimensional net-shaped body made of polyethylene, polypropylene or polyvinyl chloride.
8. A battery cover according to claim 6 or 7, characterized in that the elastic film (3) is a film of polyurethane, polycarbonate or polylactic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322848988.4U CN221304913U (en) | 2023-10-23 | 2023-10-23 | Battery cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322848988.4U CN221304913U (en) | 2023-10-23 | 2023-10-23 | Battery cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221304913U true CN221304913U (en) | 2024-07-09 |
Family
ID=91752215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322848988.4U Active CN221304913U (en) | 2023-10-23 | 2023-10-23 | Battery cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221304913U (en) |
-
2023
- 2023-10-23 CN CN202322848988.4U patent/CN221304913U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |