CN210640273U - Explosion-proof cover plate for energy storage device and energy storage device - Google Patents
Explosion-proof cover plate for energy storage device and energy storage device Download PDFInfo
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- CN210640273U CN210640273U CN201921897817.8U CN201921897817U CN210640273U CN 210640273 U CN210640273 U CN 210640273U CN 201921897817 U CN201921897817 U CN 201921897817U CN 210640273 U CN210640273 U CN 210640273U
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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 relates to an explosion-proof apron and energy memory for energy memory, include: the cover plate comprises a cover plate body, wherein the cover plate body is provided with a through hole; the explosion-proof element comprises a central part and a pressure relief part surrounding the central part, and the pressure relief part is annular and is arranged in the through hole and is in sealing connection with the through hole; the cover plate body further comprises a thinning portion arranged around the through hole and an outer ring portion arranged around the thinning portion, and the thickness of the thinning portion is smaller than that of the outer ring portion. The utility model discloses a technological effect lies in, through set up the abating layer on explosion-proof apron, satisfies not unidimensional energy memory's apron structural strength and pressure release demand simultaneously.
Description
Technical Field
The utility model relates to an energy storage safety technical field, more specifically, the utility model relates to an explosion-proof apron and energy memory for energy memory.
Background
Energy storage devices are used to store energy, such as devices that require the use of electrical energy, which requires the storage of electrical energy. In the energy storage process or the use process of the energy storage device, the situation that the internal pressure of the device is overlarge and explosion occurs can occur. The pressure inside the energy storage device needs to be relieved.
The existing energy storage device is provided with a pressure relief structure at the cover plate, and pressure is relieved through the pressure relief structure when the pressure is too high. However, in the conventional energy storage device, the pressure value required to be decompressed is different due to different sizes. This requires cover plates of different thicknesses for different sizes of energy storage devices. Good pressure relief can be achieved.
Moreover, the smaller stored energy storage device needs to satisfy the smaller explosion-proof pressure, but the structural strength of the cover plate can not be satisfied, and the assembly and the use are not facilitated.
The explosion-proof pressure difference of the energy storage devices with different sizes is large, so that the cover plates of the existing energy storage devices cannot be serialized.
Therefore, a new technical solution is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an explosion-proof apron and energy memory's new technical scheme for energy memory.
According to the utility model discloses an aspect provides an explosion-proof apron for energy memory, include:
the cover plate comprises a cover plate body, wherein the cover plate body is provided with a through hole; and the number of the first and second groups,
the explosion-proof element comprises a central part and a pressure relief part surrounding the central part, the pressure relief part is annular, and the pressure relief part is arranged in the through hole and is in sealing connection with the through hole;
the cover plate body further comprises a thinning portion arranged around the through hole and an outer ring portion arranged around the thinning portion, and the thickness of the thinning portion is smaller than that of the outer ring portion.
Optionally, the cover plate body and the central portion are made of a conductor material, and the cover plate body and the central portion are respectively used as two electrodes of the energy storage device.
Optionally, the through hole extends to form a cylindrical portion, the pressure relief portion is disposed in the cylindrical portion, a terminal defining an extending direction of the through hole is a top portion, and the other end opposite to the top portion is a bottom portion.
Optionally, the relief portion includes an extension extending radially outward from the top, the extension covering the top of the cylindrical portion.
Optionally, a bottom of the central portion extends beyond a bottom of the relief portion.
Optionally, the cover plate further comprises a bending part, the bending part is located in the thinning part or the outer ring part, the bending part is arranged around the cylindrical part, and the bending part is bent towards the bottom so that the top of the pressure relief part is flush with the top of the cover plate body.
Optionally, the cylindrical part and the inner side of the connecting position of the cover plate body are chamfered.
Optionally, the rim of the outer ring portion is provided with a step.
Optionally, the thinning portion is annular, the through hole is an annular hollow portion of the thinning portion, and the annular width of the thinning portion is 0.5mm-5 mm.
Optionally, the thickness-reducing portion is annular, the through hole is an annular inner hollow portion of the thickness-reducing portion, and the outer ring portion is fixed to the outer ring of the thickness-reducing portion in a sealing manner.
Optionally, the thinning portion forms a recess on both upper and lower surfaces of the cover plate body.
According to another aspect of the present invention, there is provided an energy storage device, comprising the above-mentioned explosion-proof cover plate of any one item.
Optionally, the energy storage device is a battery or a capacitor.
The utility model discloses a technological effect lies in, through set up the abating layer on explosion-proof apron, satisfies not unidimensional energy memory's apron structural strength and pressure release demand simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a sectional view of a cover plate body provided with a thinned portion according to an embodiment of the present invention.
Fig. 2 is a sectional view of the thinned portion of the embodiment of the present invention provided on the lower surface of the cover plate body.
Fig. 3 is a cross-sectional view of an embodiment of the present invention with a bend.
Fig. 4 is a sectional view of the upper and lower surfaces of the cover plate body depressed to form the thinning portion according to an embodiment of the present invention.
Fig. 5 is a cross-sectional view of an energy storage device according to an embodiment of the present invention.
In the figure, 1 is a cover plate body, 11 is a thinning portion, 12 is an outer ring portion, 121 is a step portion, 13 is a cylindrical portion, 14 is a bending portion, 2 is a central portion, 3 is a pressure relief portion, 31 is an extension portion, 4 is a housing, and 5 is a battery cell.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to an embodiment of the present disclosure, the utility model provides an explosion-proof apron for energy memory, as shown in fig. 1, this explosion-proof apron includes:
the cover plate comprises a cover plate body 1, wherein the cover plate body 1 is provided with a through hole; and the number of the first and second groups,
the explosion-proof element comprises a central part 2 and a pressure relief part 3 surrounding the central part 2, wherein the pressure relief part 3 is annular, and the pressure relief part 3 is arranged in the through hole and is in sealing connection with the through hole;
the cover plate body 1 further comprises a thinning portion 11 arranged around the through hole, and an outer ring portion 12 arranged around the thinning portion 11, wherein the thickness of the thinning portion 11 is smaller than that of the outer ring portion 12.
The cover plate body 1 is arranged on the energy storage device, and the pressure relief part 3 is a pressure relief component of the energy storage device. When the internal pressure of the energy storage device is too high, the cover plate body 1 deforms, and the pressure relief part 3 is extruded to damage or break the pressure relief part 3. This enables the formation of an outlet for pressure relief. To prevent explosion of the energy storage device.
In this embodiment, the cover body 1 further includes a thinned portion 11 disposed around the through hole, and an outer ring portion disposed around the thinned portion 11.
Wherein the thickness of the thinned portion 11 is smaller than that of the outer ring portion 12. When the internal pressure of the energy storage device is increased, the thinner thinning part 11 reaches a deformation condition firstly due to the pressure, and after the thinning part 11 is deformed, the pressure relief part 3 is pressed from the through hole, so that the pressure relief part 3 is damaged or broken. This enables the formation of a pressure-venting outlet.
The different energy storage devices vary in size. The energy storage device with larger size can be provided with the thickness of the cover plate according to the requirement of explosion-proof pressure. Smaller size energy storage devices require less burst pressure and require thinner cover plates. However, a cover plate that is too thin may not satisfy the structural strength of the energy storage device. There is a conflict between explosion pressure and structural strength.
After the thinning part 11 is arranged on the cover plate body 1, the peripheral part 12 can meet the structural strength of the cover plate body 1, and the thinning part 11 can meet the function of deforming and relieving pressure under small pressure. The contradiction between the explosion-proof pressure and the structural strength is solved.
And the peripheral portion 12 satisfying structural strength is more easily assembled. This also allows for different sized energy storage devices.
In other examples, the thinned portion 11 may be formed as a recess in the upper portion of the cover main body 1, or as shown in fig. 2, the thinned portion 11 may be formed as a recess in the lower portion of the cover main body 1. The contradiction between explosion-proof pressure and structural strength can be solved, and two requirements are met. The device is suitable for energy storage devices with different sizes.
In one embodiment, the cover plate body 1 and the central portion 2 are made of conductive materials, and the cover plate body 1 and the central portion 2 respectively serve as two electrodes of an energy storage device.
In this embodiment, the cover plate body 1 and the central portion 2 serve as two electrodes of the energy storage device, respectively. The cover plate body 1 and the central part 2 are made of conductive conductor materials. A pressure relief portion 3 surrounding the central portion separates the central portion 2 from the cover body 1, wherein the pressure relief portion 3 is an insulating material. For example, the material of the pressure relief portion 3 is glass or ceramic. That is, when the cover plate body 1 is deformed, the pressure relief portion 3 can be pressed to damage or break the pressure relief portion 3, even if the condition for insulation is satisfied.
In one embodiment, the through hole extends to form a cylindrical part 13, the relief part 3 is arranged in the cylindrical part 13, the end defining the extending direction of the through hole is a top part, and the other end opposite to the top part is a bottom part.
In this embodiment, the pressure relief portion 3 is provided inside the cylindrical portion 13. The cylindrical portion 13 can fix the relief portion 3, and the sealing performance of the relief portion 3 can be ensured. When the pressure is too large and the deformation occurs, the bottom of the cylindrical part 13 and the pressure relief part 3 are extruded, the sealing performance of the pressure relief part 3 is damaged, and the purposes of pressure relief and explosion prevention are achieved.
In one embodiment, as shown in fig. 1, the relief portion 3 includes an extension 31 extending radially outward from the top, the extension 31 covering the top of the cylindrical portion 13.
In this embodiment, the top of the pressure relief portion 3 is higher than the top of the cylindrical portion 13. The top of the pressure relief portion 3 extends radially outward to form an extension 31, and the top of the cylindrical portion 13 is covered by the extension 31.
When the cover body 1 is applied in an energy storage device, the cover body 1 and the central portion 2 serve as different electrodes of the energy storage device. The pressure relief portion 3 having an insulating function covers the top of the cylindrical portion 13, and thus, the outer end line connected to the central portion 2 can be effectively prevented from contacting the extended cylindrical portion 13. The energy storage device is prevented from short-circuiting. The safety performance of the energy storage device is improved.
In one embodiment, the bottom of the central portion 2 extends beyond the bottom of the relief portion 3.
In this embodiment, the bottom of the central part 2 extends beyond the bottom of the pressure relief part 3 when the explosion-proof cover is applied in the energy storage device. The base is referred to as being located inside the energy storage device. The central part 2 is extended compared to the pressure relief part 3, which facilitates the structural connection inside the energy storage device. For example, the central portion 2 is connected to an internal circuit, and the central portion 2 is extended to be more easily connected.
In one embodiment, as shown in fig. 3, the explosion-proof cover further comprises a bent portion 14, the bent portion 14 is located at the thinned portion 11 or the outer ring portion 12, the bent portion 14 is disposed around the cylindrical portion 13, and the bent portion 14 is bent toward the bottom so that the top of the pressure relief portion 3 is flush with the top of the cover body 1.
In this embodiment, the bent portion 14 is provided at the position of the thinned portion 11 or the outer ring portion 12, and the bent direction of the bent portion 14 is opposite to the extending direction of the cylindrical portion 13. The structure enables the deformation quantity of the cover plate body 1 to be the same when the same force is applied to the cover plate body 1 in two different directions of upward or downward.
When apron body 1 sets up on energy memory like this, no matter with that face of apron body 1 inside towards energy memory, can both satisfy energy memory's explosion-proof pressure. Thus, the assembly of the explosion-proof cover plate is more convenient.
In one example, the cylindrical portion 13 is chamfered inside the connecting position with the cap body 1.
When the pressure inside the energy storage device reaches a certain degree, the cover plate body 1 deforms. The formed chamfer can avoid stress concentration at the joint, so that the deformation of the cover plate body 1 is rapidly transmitted to the cylindrical part. Therefore, when the pressure value reaches the explosion-proof pressure, the pressure relief part 3 can be quickly damaged to realize pressure relief.
And a pressure relief channel is more easily formed between the position of the chamfer and the pressure relief portion 3.
In one embodiment, the edge of the outer ring portion 12 is provided with a step portion 121.
The step 121 of the edge of the outer ring portion 12 makes the fitting of the cover body 1 easier. For example, when the cover plate body 1 is fixedly connected to the housing of the energy storage device, the step portion 121 is fixed by being caught at the edge of the housing. This makes positioning for assembly easier.
In one embodiment, the thinning portion 11 is annular, the through hole is an annular hollow portion of the annular thinning portion 11, and the annular width of the thinning portion 11 is 0.5mm to 5 mm.
In this embodiment, the thinning portion 11 is a ring structure, and the inner part of the ring structure is a through hole. The width of the annular thinned portion 11 is positively correlated with the structural strength of the cover main body 1, and the width of the thinned portion 11 can affect the structural strength of the cover main body 1. Those skilled in the art can adjust the width of the thinning portion 11 according to the structural strength requirement, so that the cover body 1 with different sizes can obtain the required structural strength.
The width of the thinned portion 11 is preferably 0.5mm to 5 mm. The width of the thinning part 11 is within the range, and not only can enough thinning areas meet the pressure relief requirement, but also the requirement of the structural strength of the cover plate body 1 can be met.
In one embodiment, the thickness-reduced portion 11 is annular, the through hole is an annular hollow portion of the annular thickness-reduced portion 11, and the outer ring portion 12 is fixed to the outer ring of the thickness-reduced portion 11 in a sealing manner.
In this embodiment, the thickness reduction portion 11 and the outer ring portion 12 are fixed together in a sealed manner, and the annular thickness reduction portion 11 is fixed inside the annular outer ring portion 12. In this structure, the reduced thickness portion 11 and the outer ring portion 12 are processed separately during processing, so that the processing structure can be simplified and the processing can be facilitated.
In other embodiments, the thinned portion 11 and the outer ring portion 12 may be integrally formed.
In one embodiment, as shown in fig. 4, the thinning portion 11 is formed with a recess on both upper and lower surfaces of the cap body 1.
In this embodiment, the thickness of the thinned portion 11 is thinner than the peripheral portion 12, and the thinned portion 11 forms recesses on both upper and lower surfaces of the cover body 1. This makes it possible to uniformly apply force to both the upper and lower surfaces of the thinned portion 11.
The thickness of the thinning part 11 and the structural strength of the cover plate body 1 are in a positive correlation, and the structural strength can be adjusted by adjusting the thickness of the thinning part 11, so that the structural strength of the cover plate bodies 1 with different sizes can be adjusted.
Preferably, the thickness of the thinned portion 11 is 0.1mm to 1mm, and the structural strength of the cover plate bodies 1 of different sizes can be satisfied within this thickness range.
According to an embodiment of the present invention, there is provided an energy storage device, including the above-mentioned explosion-proof cover plate of any one.
In this embodiment, the explosion-proof cover plate on the energy storage device is the above-mentioned explosion-proof cover plate. Through the anti-explosion cover plate, the energy storage device solves the contradiction between the anti-explosion pressure and the structural strength. The explosion-proof cover plate can adapt to different sizes of the energy storage device.
In one example, the energy storage device is a battery or a capacitor.
The energy storage device may be a device that stores various different energies, such as a battery and a capacitor that stores electrical energy. Other energy storage devices are also possible.
Fig. 5 is a cross-sectional view of an energy storage device according to an embodiment of the present disclosure.
The shell 4 and the cover plate body 1 of the energy storage device form a sealed energy storage device, a battery cell 5 in the energy storage device is connected to the central part 2 and the shell 4 through a tab, and the shell 4 and the cover plate body 1 are in conductive connection to serve as one electrode of the energy storage battery. The central part 2 acts as the other electrode.
The battery cell 5 of the energy storage device may be a winding core or a laminated battery cell, or may be of another type.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. An explosion-proof cover plate for an energy storage device, comprising:
the cover plate comprises a cover plate body, wherein the cover plate body is provided with a through hole; and the number of the first and second groups,
the explosion-proof element comprises a central part and a pressure relief part surrounding the central part, the pressure relief part is annular, and the pressure relief part is arranged in the through hole and is in sealing connection with the through hole;
the cover plate body further comprises a thinning portion arranged around the through hole and an outer ring portion arranged around the thinning portion, and the thickness of the thinning portion is smaller than that of the outer ring portion.
2. The explosion-proof cover plate of claim 1 wherein the cover plate body and the central portion are of a conductive material, the cover plate body and the central portion respectively serving as two electrodes of an energy storage device.
3. The explosion-proof cover plate of claim 1, wherein the through hole extends to form a cylindrical part, the relief part is arranged in the cylindrical part, the tail end defining the extending direction of the through hole is a top part, and the other end opposite to the top part is a bottom part.
4. The vent cover plate of claim 3, wherein the relief portion includes an extension extending radially outward from the top, the extension covering the top of the cylindrical portion.
5. The vent panel of claim 3, wherein a bottom of the central portion extends beyond a bottom of the relief portion.
6. The vent cover according to claim 3, further comprising a bend located at the thinned portion or the outer ring portion, the bend being disposed around the cylindrical portion, the bend being bent toward the bottom to make the top of the vent portion flush with the top of the cover body.
7. The explosion-proof cover plate as claimed in claim 3, wherein the cylindrical portion is chamfered at an inner side of a connecting position with the cover plate body.
8. The vent panel of claim 1, wherein an edge of the outer ring portion is provided with a step.
9. The explosion-proof cover plate according to claim 1, wherein the thinning portion is annular, the through hole is an annular hollow portion of the annular thinning portion, and the annular width of the thinning portion is 0.5mm-5 mm.
10. The explosion-proof cover plate of claim 1, wherein the thinned portion is annular, the through hole is an annular hollow portion of the annular thinned portion, and the outer ring portion is fixed on an outer ring of the thinned portion in a sealing manner.
11. The explosion-proof cover plate as claimed in claim 1, wherein the thinned portions are formed with depressions on both upper and lower surfaces of the cover plate body.
12. An energy storage device comprising an explosion-proof cover as claimed in any one of claims 1 to 11.
13. The energy storage device of claim 12, wherein the energy storage device is a battery or a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897817.8U CN210640273U (en) | 2019-11-05 | 2019-11-05 | Explosion-proof cover plate for energy storage device and energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921897817.8U CN210640273U (en) | 2019-11-05 | 2019-11-05 | Explosion-proof cover plate for energy storage device and energy storage device |
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| Publication Number | Publication Date |
|---|---|
| CN210640273U true CN210640273U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921897817.8U Active CN210640273U (en) | 2019-11-05 | 2019-11-05 | Explosion-proof cover plate for energy storage device and energy storage device |
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| CN (1) | CN210640273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023070931A1 (en) * | 2021-10-28 | 2023-05-04 | 惠州亿纬锂能股份有限公司 | Battery cover plate and battery |
-
2019
- 2019-11-05 CN CN201921897817.8U patent/CN210640273U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023070931A1 (en) * | 2021-10-28 | 2023-05-04 | 惠州亿纬锂能股份有限公司 | Battery cover plate and battery |
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