CN213483850U - Double protection structure of battery - Google Patents
Double protection structure of battery Download PDFInfo
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- CN213483850U CN213483850U CN202022430866.XU CN202022430866U CN213483850U CN 213483850 U CN213483850 U CN 213483850U CN 202022430866 U CN202022430866 U CN 202022430866U CN 213483850 U CN213483850 U CN 213483850U
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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 a technical field of battery discloses a duplicate protection structure of battery, include: the cover body is provided with a blasting through hole, the periphery of the blasting through hole is provided with a bending flanging, the bending flanging is bent towards the blasting through hole, and a riveting groove is formed between the bending flanging and the cover body; the explosion-proof piece is arranged in the explosion through hole, the periphery of the explosion-proof piece is embedded in the riveting groove, and the bent flanging is riveted on the periphery of the explosion-proof piece; the explosion-proof piece has pressure explosion point and temperature explosion point, and when pressure reaches the pressure explosion point or the temperature reaches the temperature explosion point, the explosion-proof piece breaks. The utility model discloses the duplicate protection structure of battery that technical scheme provided has improved the security performance of battery through duplicate protection.
Description
Technical Field
The patent of the utility model relates to a technical field of battery particularly, relates to a duplicate protection structure of battery.
Background
A "lithium battery" is a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Because the chemical properties of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high, and the lithium battery becomes the mainstream at present along with the development of scientific technology.
Among the prior art, the battery top cap closing cap generally includes lid and two utmost point posts at the upper end opening of casing, and two utmost point posts wear to establish respectively in the lid, and the inner of utmost point post extends to inside the casing, is connected with the electric core in the casing, and the outer end of utmost point post extends to outside the lid for be connected with external element.
At present, in order to guarantee the inside security performance of battery, generally can set up the explosion-proof piece on battery top cap, the explosion-proof piece adopts the aluminium material that has the nick, and the cost is higher to can only detect the inside security performance of battery through atmospheric pressure, inside in case the temperature of battery is high, atmospheric pressure can not explode when low, takes place danger easily.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a duplicate protection structure of battery aims at solving prior art, can only detect the problem of the inside security performance of battery through atmospheric pressure.
The utility model discloses a realize like this, a duplicate protection structure of battery, include:
the cover body is provided with a blasting through hole, the periphery of the blasting through hole is provided with a bending flanging, the bending flanging is bent towards the blasting through hole, and a riveting groove is formed between the bending flanging and the cover body;
the explosion-proof piece is arranged in the explosion through hole, the periphery of the explosion-proof piece is embedded in the riveting groove, and the bent flanging is riveted on the periphery of the explosion-proof piece; the explosion-proof piece has pressure explosion point and temperature explosion point, and when pressure reaches the pressure explosion point or the temperature reaches the temperature explosion point, the explosion-proof piece breaks.
Optionally, the bent flange is provided with an inner wall facing the riveting groove, a first clamping piece is arranged on the inner wall of the bent flange, a first clamping groove is formed in the periphery of the explosion-proof piece, and the clamping piece is embedded in the first clamping groove.
Optionally, the first clamping piece is a plurality of annular tooth-shaped protrusions arranged at intervals, the first clamping groove is a plurality of annular tooth-shaped grooves arranged at intervals, and the plurality of annular tooth-shaped protrusions are meshed with the plurality of annular tooth-shaped grooves.
Optionally, still include the sealing washer, the sealing washer with the explosion-proof piece coincide is arranged, the outward flange of sealing washer inlays to be located in the riveting inslot.
Optionally, the cover body has a lower side wall facing the riveting groove, and a second clamping piece protrudes from the lower side wall facing the riveting groove and abuts against the sealing ring.
Optionally, the sealing ring has a second clamping groove facing the lower side wall opening, and the second clip is embedded in the second clamping groove.
Optionally, the second clamping piece is an annular protrusion, the second clamping groove is an annular groove, and the annular protrusion is embedded in the annular groove.
Optionally, the explosion-proof sheet is a plastic sheet.
Compared with the prior art, the utility model provides a duplicate protection structure of battery, be fixed in blasting through-hole department with the explosion-proof piece through the turn-ups of bending, realize the fixed of explosion-proof piece, temperature and pressure all can direct action in this explosion-proof piece, when the battery internal pressure reaches pressure rupture point or temperature reaches temperature rupture point, the explosion-proof piece breaks, and the pressure release, thereby avoid blasting, adopt two kinds of conditions of temperature and pressure to carry out the detection of battery security performance simultaneously, duplicate protection, compare in the structure that single adoption pressure realized the blasting, more can protect the inside safety of battery, improve the security performance of battery. The problem of among the prior art, can only detect the inside security performance of battery through atmospheric pressure is solved.
Drawings
Fig. 1 is a schematic perspective view of a dual protection structure of a battery according to the present invention;
fig. 2 is a schematic half-sectional view of a dual protection structure of a battery provided by the present invention;
fig. 3 is an enlarged schematic view at a in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1 to 3, the preferred embodiment of the present invention is shown.
In the embodiment of the utility model provides an in, the duplicate protection structure of this battery, include:
the cover body 10 is provided with a blasting through hole 10a, a bending flanging 11 is arranged on the periphery of the blasting through hole 10a, the bending flanging 11 bends towards the blasting through hole 10a, and a riveting groove is formed between the bending flanging 11 and the cover body 10;
the explosion-proof piece 21 is arranged in the explosion through hole 10a, the periphery of the explosion-proof piece 21 is embedded in the riveting groove, and the bent flanging 11 is riveted on the periphery of the explosion-proof piece 21; the rupture disk 21 has a pressure rupture point and a temperature rupture point, and when the pressure reaches the pressure rupture point or the temperature reaches the temperature rupture point, the rupture disk 21 ruptures.
The cover 10 of the present embodiment is preferably a top cover plate, which is used to cover the cavity of the battery case, and the electrode post structures on both sides of the cover 10 realize the electrical exchange between the battery core in the cavity and the outside, so that when the cover is used in situations of circuit failure, overcharge, overdischarge, or high temperature, the pressure or temperature in the cavity may increase, and explosion may occur easily. In other embodiments, the cover 10 may be a battery case, which is not described in detail.
In this embodiment, be fixed in explosion through-hole 10a department with explosion-proof piece 21 through turn-ups 11 that bends, realize the fixed of explosion-proof piece 21, temperature and pressure all can direct action in this explosion-proof piece 21, when the battery internal pressure reaches pressure rupture point or temperature reaches temperature rupture point, explosion-proof piece 21 breaks, and the pressure release, thereby avoid taking place the explosion, adopt two kinds of conditions of temperature and pressure to carry out the detection of battery security performance simultaneously, dual protection, compare in the structure that single adoption pressure realized the blasting, more can protect the inside safety of battery, improve the security performance of battery.
The pressure explosion point may be set according to the thickness, the score, etc. of the explosion-proof sheet 21, and the temperature explosion point may be set according to different materials to realize double protection.
Referring to fig. 2 and fig. 3, in an embodiment of the present invention, the bent flange 11 has an inner wall facing the riveting groove, the inner wall of the bent flange 11 is provided with a first clamping member 111, the periphery of the explosion-proof sheet 21 has a first clamping groove, and the clamping member is embedded in the first clamping groove.
In order to avoid breaking away from the riveting groove when blasting, explosion-proof piece 21 needs to be guaranteed, and explosion-proof piece 21 is stable fixed, like this, inlay card in first draw-in groove through first fastener 111, has guaranteed that explosion-proof piece 21's periphery is stably arranged in blasting through-hole 10a department, avoids breaking away from.
Specifically, the first clip member 111 is a plurality of annular tooth-shaped protrusions arranged at intervals, the first clip groove is a plurality of annular tooth-shaped grooves arranged at intervals, and the plurality of annular tooth-shaped protrusions are meshed with the plurality of annular tooth-shaped grooves.
The annular tooth-shaped protrusions are continuous protrusion structures extending around the riveting grooves, and similarly, the annular tooth-shaped grooves are continuous groove structures extending around the periphery of the explosion-proof sheet 21, so that the structural stability of the explosion-proof sheet 21 is further ensured through the meshing between the plurality of annular tooth-shaped protrusions and the annular tooth-shaped grooves. Moreover, the protrusions and the grooves are both in a tooth-shaped structure, namely a trapezoidal structure, so that when the explosion-proof sheet 21 is specifically installed, the bent flanging 11 is convenient to rivet and buckle on the periphery of the explosion-proof sheet 21, and the explosion-proof sheet is convenient to fix. In addition, the number of the annular tooth-shaped protrusions provided by the embodiment is optional but not limited to three, and one of the annular tooth-shaped protrusions provided by the embodiment is located at the edge of the inner wall of the bent flange 11, so that the annular tooth-shaped groove formed on the explosion-proof sheet 21 is located at the edge of the inner wall of the bent flange 11, that is, the annular tooth-shaped groove can be regarded as an annular notch, so that the explosion-proof sheet 21 can be conveniently exploded through pressure, and the pressure explosion point can be correspondingly changed by adjusting the depth of the annular tooth-shaped groove.
Of course, in another embodiment, in order to stably fix the explosion-proof sheet 21, the explosion-proof sheet 21 and the cover 10 may be welded and fixed, and details are not repeated.
Referring to fig. 2 and fig. 3, in an embodiment of the present invention, the dual protection structure of the battery further includes a sealing ring 23, the sealing ring 23 is stacked with the explosion-proof sheet 21, and an outer edge of the sealing ring 23 is embedded in the riveting groove.
Because the utility model discloses the fixed mode that provides adopts turn-ups 11 riveting fixed of bending, for avoiding battery inner chamber gas leakage, need seal, consequently, be equipped with sealing washer 23 in the below of this explosion-proof piece 21, rivet explosion-proof piece 21 and sealing washer 23's superimposed structure in the riveting inslot jointly through turn-ups 11 of bending, realize fixedly, on the one hand, can guarantee to seal, on the other hand, because sealing washer 23 is elastic material, when turn-ups 11 riveting fixed of bending, can make explosion-proof piece 21 stable fixation.
The cover 10 has a lower wall facing the rivet groove, and a second hook 13 projects from the lower wall toward the rivet groove, and the second hook 13 abuts against the gasket 23.
The sealing ring 23 can be fastened by the second clamping piece 13, and the sealing ring 23 is prevented from being separated from the riveting groove.
The sealing ring 23 has a second slot opening toward the lower side wall, and the second clip 13 is embedded in the second slot.
Like this, sealing washer 23 part is arranged in the riveting inslot, and part is arranged in blasting through-hole 10a, avoids sealing washer 23 to break away from and remove through second fastener 13 to, combine foretell first fastener 111, the riveting inslot is half parcel fixed with the integrated configuration of explosion-proof piece 21 and sealing washer 23, avoids breaking away from, with stable fixed.
Specifically, in this embodiment, the second clip 13 is an annular protrusion, the second slot is an annular groove, and the annular protrusion is embedded in the annular groove. To further effect the rivet fixing.
During specific installation, the sealing ring 23 is installed firstly, then the explosion-proof sheet 21 is installed, and finally the bending flanging 11 is riveted to realize fixation.
In another embodiment, in order to fix the integral structure of the explosion-proof sheet 21 and the sealing ring 23, a through hole may be formed at the edge of the explosion-proof sheet 21 and the sealing ring 23, a clamping column may be arranged on the inner wall of the bent flange 11, and the clamping column penetrates through the through hole and abuts against the lower side wall of the riveting groove to fix the explosion-proof sheet and the sealing ring, which is not described in detail.
Referring to fig. 1 to 3, in an embodiment of the present invention, the explosion-proof sheet 21 is a plastic sheet, and the material thereof may be FEP, PFA or fluoroplastic.
The materials given in this embodiment are preferred materials, and certainly, other materials may be used, which are not described in detail.
In the above embodiment, FEP is taken as an example, and is thermally deformed at 100-200 ℃, dissolved at 200-320 ℃, and set at 0.4KPa-1.5KPa, thereby realizing double protection.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A dual protection structure of a battery, comprising:
the cover body is provided with a blasting through hole, the periphery of the blasting through hole is provided with a bending flanging, the bending flanging is bent towards the blasting through hole, and a riveting groove is formed between the bending flanging and the cover body;
the explosion-proof piece is arranged in the explosion through hole, the periphery of the explosion-proof piece is embedded in the riveting groove, and the bent flanging is riveted on the periphery of the explosion-proof piece; the explosion-proof piece has pressure explosion point and temperature explosion point, and when pressure reaches the pressure explosion point or the temperature reaches the temperature explosion point, the explosion-proof piece breaks.
2. The dual protection structure of a battery as claimed in claim 1, wherein the bent flange has an inner wall facing the rivet groove, the inner wall of the bent flange is provided with a first clip, the periphery of the explosion-proof plate has a first engaging groove, and the clip is engaged with the first engaging groove.
3. The dual protection structure of claim 2, wherein said first latch member is a plurality of spaced annular tooth-shaped protrusions, said first engaging groove is a plurality of spaced annular tooth-shaped grooves, and said plurality of annular tooth-shaped protrusions are engaged with said plurality of annular tooth-shaped grooves.
4. The double protection structure of a battery as claimed in any one of claims 1 to 3, further comprising a sealing ring, wherein the sealing ring is disposed in an overlapping manner with the explosion-proof sheet, and an outer edge of the sealing ring is embedded in the riveting groove.
5. The dual protection structure for a battery according to claim 4, wherein the cover has a lower sidewall facing the rivet groove, and a second clip protrudes from the lower sidewall facing the rivet groove and abuts against the sealing ring.
6. The dual protection structure of claim 5, wherein said sealing ring has a second locking groove opening toward said lower sidewall, and said second clip is inserted into said second locking groove.
7. The dual protection structure of claim 6, wherein the second clip member is an annular protrusion, the second engaging groove is an annular groove, and the annular protrusion is inserted into the annular groove.
8. The double protection structure of battery as claimed in any one of claims 1 to 3, wherein said explosion-proof sheet is a plastic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430866.XU CN213483850U (en) | 2020-10-27 | 2020-10-27 | Double protection structure of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430866.XU CN213483850U (en) | 2020-10-27 | 2020-10-27 | Double protection structure of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213483850U true CN213483850U (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022430866.XU Active CN213483850U (en) | 2020-10-27 | 2020-10-27 | Double protection structure of battery |
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| CN (1) | CN213483850U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014382A (en) * | 2023-02-09 | 2023-04-25 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
| WO2023108529A1 (en) * | 2021-12-16 | 2023-06-22 | 宁德时代新能源科技股份有限公司 | Battery cell, cover assembly, battery, electrical device, method, and equipment |
-
2020
- 2020-10-27 CN CN202022430866.XU patent/CN213483850U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023108529A1 (en) * | 2021-12-16 | 2023-06-22 | 宁德时代新能源科技股份有限公司 | Battery cell, cover assembly, battery, electrical device, method, and equipment |
| CN116014382A (en) * | 2023-02-09 | 2023-04-25 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
| CN116014382B (en) * | 2023-02-09 | 2023-06-27 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
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