CN208460852U - Rupture pressure disc and secondary cell top cover - Google Patents
Rupture pressure disc and secondary cell top cover Download PDFInfo
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- CN208460852U CN208460852U CN201820459059.0U CN201820459059U CN208460852U CN 208460852 U CN208460852 U CN 208460852U CN 201820459059 U CN201820459059 U CN 201820459059U CN 208460852 U CN208460852 U CN 208460852U
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- protrusion
- rupture pressure
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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
This application involves rupture pressure disc and secondary cell top covers.The rupture pressure disc is used for the explosionproof hole of sealed secondary battery top cover, comprising: marginal portion, the marginal portion are connect with the outer periphery of explosionproof hole edge；And center portion, the marginal portion surround and is connected to the center portion, wherein, the center portion is provided with indentation close to the region of the marginal portion, the shape of the indentation is identical as the shape of the outer contour of the explosionproof hole, in the indentation area encompassed, the upper surface of the center portion is additionally provided with protrusion, and the protrusion gradually protrudes the matrix surface of the center portion.The program improves the safety of secondary cell.
Description
Technical field
This application involves energy storage device technical field more particularly to a kind of rupture pressure discs and secondary cell top cover.
Background technique
The inside of secondary cell is the environment of opposing seal, in the case where overcharging or being punctured the failure conditions for leading to short circuit, two
A large amount of heat and gas can be quickly generated inside primary cell, and are gathered inside housings, when the pressure of enclosure interior reaches pre-
If pressure value when, will lead to that shell is burst, top cover lifts winged, cause the safety problem of secondary cell.
Currently, be usually provided with rupture pressure disc on secondary cell top cover, effect be when the intracorporal gas pressure of shell be raised to it is default
When value, rupture pressure disc opens supplied gas discharge, avoids generation shell from bursting and lifts the risks such as winged with top cover.Therefore, for rupture pressure disc and
Speech, it is desirable that its reliability with higher can be opened instantaneously, after unlatching for example, intensity is higher before valve opening under preset pressure
It can sufficiently open, and there is biggish pressure release area.
Utility model content
This application provides a kind of rupture pressure disc and secondary cell top covers, can be improved the safety of secondary cell.
This application provides a kind of rupture pressure discs, the explosionproof hole for sealed secondary battery top cover, comprising:
Marginal portion, the marginal portion are connect with the outer periphery of explosionproof hole edge；With
Center portion, the marginal portion surround and are connected to the center portion,
Wherein, the center portion is provided with the indentation of supplied gas tearing, the quarter close to the region of the marginal portion
The shape of trace is identical as the shape of the outer contour of the explosionproof hole,
In the indentation area encompassed, the upper surface of the center portion is additionally provided with protrusion, the protrusion by
Gradually protrude from the matrix surface of the center portion.
Optionally, the protrusion is provided with multiple, the first protrusion and the second protrusion respectively alongst arranged,
And third protrusion and the 4th protrusion along width direction arrangement,
On the direction that first protrusion is directed toward second protrusion, the protrusion height of first protrusion gradually increases
Adding, the protrusion height of second protrusion is gradually reduced,
On the direction that the third protrusion is directed toward the 4th protrusion, the protrusion height of the third protrusion gradually subtracts
Small, the protrusion height of the 4th protrusion gradually increases.
Optionally, at least one of first protrusion and second protrusion include that the first inclination protrusion and second is inclined
Oblique protrusion, the two tilts and intersects towards close mutual side, and forms carinate pinnacle in intersection,
And/or
At least one of the third protrusion and the 4th protrusion include that the first inclination protrusion and second tilt protrusion,
The two tilts and intersects towards close mutual side, and forms carinate pinnacle in intersection.
Optionally, the angle of the first inclination protrusion and second inclination protrusion is 135 ° ± 2 °.
Optionally, first protrusion and second protrusion are symmetrical arranged, the third protrusion and the 4th protrusion
It is symmetrical arranged.
Optionally, first protrusion, second protrusion, the third protrusion and the 4th protrusion all extend to institute
State indentation.
It optionally, further include the reinforcement trace for being set to the center portion, the reinforcement trace is located at first protrusion, institute
State the second protrusion, in the region that surrounds jointly of the third protrusion and the 4th protrusion.
Optionally, the position where the reinforcement trace is gradually lower than described matrix surface.
Optionally, the 3 of described matrix surface is protruded at the highest protruding parts of first protrusion and second protrusion
Times~5 times, 3 times~4 times of described matrix surface are protruded at the highest protruding parts of the third protrusion and the 4th protrusion.
Present invention also provides a kind of secondary cell top covers, comprising:
Coping plate, the coping plate offer explosionproof hole；With
Rupture pressure disc as described above, the rupture pressure disc seal the explosionproof hole,
Wherein, the indentation is set to the inner surface of the rupture pressure disc, described raised towards the outside of the coping plate
Protrusion.
Technical solution provided by the present application can achieve it is following the utility model has the advantages that
This application provides a kind of rupture pressure discs, wherein center portion is provided with indentation close to the region of marginal portion, the quarter
Trace can be torn under the action of gas preset pressure, and the shape phase of the shape of the indentation and the outer contour of explosionproof hole
Together, secondary cell will be slow production gas in use, and the gas pressure inside secondary cell is higher than the unlatching pressure of rupture pressure disc
When power, rupture pressure disc is torn from indentation, since the centrally located part of the indentation is close to the region of marginal portion, and along explosion-proof
The opening shape in hole extends, and for the scheme of the central area of the centrally disposed part of indentation, rupture pressure disc is being opened
It is smaller to the requirement for height of the indentation unlatching when opening, even if rupture pressure disc is smaller at a distance from external structure, will not influence explosion-proof
Film it is normally-open, also, open after rupture pressure disc have biggish pressure release area, improve the safety of secondary cell, separately
Outside, in indentation area encompassed, it is additionally provided with the matrix surface for gradually protruding from center portion, the protrusion gradually protruded can be with
The thickness of center portion is gradually increased, and the more region of center portion can be occupied, so, when secondary cell is in work
When slowly producing gas during making, air pressure can act on the bottom surface of rupture pressure disc, and it is whole that center portion can be improved in the protrusion gradually protruded
The ability of body resistance to deformation, with reduce due to center portion stress deformation caused by indentation generate fatigue rupture,
Improve the safety of secondary cell.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Application.
Detailed description of the invention
Fig. 1 is the decomposition view of secondary cell top cover provided by the embodiments of the present application；
Fig. 2 is the schematic diagram of rupture pressure disc provided by the embodiments of the present application；
Fig. 3 is the top view of rupture pressure disc provided by the embodiments of the present application；
Fig. 4 is the A-A view in Fig. 3；
Fig. 5 is the B-B view in Fig. 3.
Appended drawing reference:
10- top cover；
100- explosionproof hole；
20- rupture pressure disc；
The marginal portion 200-；
202- center portion；
2020- indentation；
2022- protrusion；
The first protrusion of 20220-；
20220a- first tilts protrusion；
20220b- second tilts protrusion；
The carinate pinnacle 20220c-；
The second protrusion of 20222-；
20224- third protrusion；
The 4th protrusion of 20226-；
2024- matrix surface；
2026- reinforces trace.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Specific embodiment
The application is described in further detail below by specific embodiment and in conjunction with attached drawing.
It should be noted that the nouns of locality such as "upper", "lower" described in the embodiment of the present application, "left", "right" are with attached drawing
Shown in angle come what is be described, should not be construed as the restriction to the embodiment of the present application.In addition, within a context, it is also necessary to
Understand, when mentioning an element and being connected to another element "upper" or "lower", can not only be connected directly between another
One element "upper" perhaps "lower" can also be indirectly coupled to by intermediary element another element "upper" or " under.
In addition, herein, " length direction " refers to the length direction of rectangle top cover (with reference to X side of the Fig. 1 into Fig. 3
To), " width direction " refers to the width direction (Y-direction in referring to figs. 1 to Fig. 3) of rectangle top cover.
As shown in Figure 1, secondary cell generally includes top cover 10, shell and electrode assembly (being not shown in attached drawing), electricity
Pole component can be accommodated in shell by the opening of shell, and the opening of shell is sealed by top cover 10, top cover 10 and shell
Contact portion can be connected to each other for example, by welding.
In order to guarantee the safety of secondary cell, explosionproof hole 100 is usually opened up on top cover 10, which passes through anti-
Quick-fried film 20 seals, and when the gas pressure inside secondary cell is lower than the preset pressure that rupture pressure disc 20 is opened, rupture pressure disc 20 makes to prevent
Blast hole 100 is in sealing state, conversely, the gas pressure inside secondary cell is higher than the preset pressure that rupture pressure disc 20 is opened
When, rupture pressure disc 20 is opened under the action of gas pressure, and gas is released via explosionproof hole 100, is occurred to avoid secondary cell quick-fried
It is fried.
As shown in Fig. 2, rupture pressure disc 20 includes the marginal portion 200 being connected and center portion 202,200 ring of marginal portion
It is arranged around center portion 202, wherein marginal portion 200 is connect with the outer periphery of explosionproof hole 100 edge, such as is welded, thus close
Seal explosionproof hole 100.
In Fig. 1 and embodiment shown in Fig. 2, explosionproof hole 100 be middle part be rectangle, both ends are semicircular oblong
Hole, correspondingly, the outline shape of the marginal portion 200 of rupture pressure disc 20 can match setting with the shape of explosionproof hole 100.
In addition, the thickness of marginal portion 200 and the thickness of center portion 202 may be the same or different, the present embodiment
In, the thickness of marginal portion 200 is greater than the thickness of center portion 202, to realize that marginal portion 200 connects with the reliable of top cover 10
It connects.
Center portion 202 is provided with the indentation 2020 of supplied gas tearing, the indentation close to the region of marginal portion 200
2020 can be torn under the action of gas preset pressure, and the outer profile of the shape of the indentation 2020 and explosionproof hole 100
The shape of line is identical.
Readily comprehensible, secondary cell will be slow production gas in use, and the gas pressure inside secondary cell is high
When the cracking pressure of rupture pressure disc 20, rupture pressure disc 20 is torn from indentation 2020, due to the centrally located part of indentation 2020
202 close to the region of marginal portion 200, and extends along the opening shape of explosionproof hole 100, sets accordingly, with respect to indentation 2020
It sets for the scheme of the central area of center portion 202, the height that rupture pressure disc 20 opens the indentation 2020 when opening is wanted
It asks smaller, even if rupture pressure disc 20 is smaller at a distance from external structure, the normally-open of rupture pressure disc 20 will not be influenced, also, open
Rupture pressure disc 20 after opening has biggish pressure release area, improves the safety of secondary cell.
It should be noted that indentation 2020 can be set in the upper surface of center portion 202, also can be set in center portion
202 lower surface, the application are not especially limited this.Also, indentation 2020 can be obtained by way of removing material,
It can also make its thickness is thinning to be formed by stamping forming mode.
With continued reference to FIG. 2, the upper surface of center portion 202 is additionally provided with convex in 2020 area encompassed of indentation
2022 are played, protrusion 2022 gradually protrudes from the matrix surface 2024 of center portion 202." gradually protruding " mentioned here refers to
Protrusion height of the protrusion 2022 at different parts is different.The protrusion 2022 gradually protruded can gradually increase center portion 202
Thickness, and the more region of center portion 202 can be occupied, so, when secondary cell is slow during the work time
When producing gas, air pressure can act on the bottom surface of rupture pressure disc, and the whole resistance of center portion 202 can be improved in the protrusion 2022 gradually protruded
The ability of deformation, to reduce the stress deformation due to center portion 2022 caused by the fatigue that is generated at indentation 2020 it is broken
It is bad, improve the safety of secondary cell.
Specifically, multiple, respectively first the 20220, second protrusion of protrusion has can be set in the quantity of protrusion 2022
20222, third protrusion 20224 and the 4th protrusion 20226, wherein the first protrusion 20220 and the second protrusion 20222 are along top cover
10 lateral arrangement, along the longitudinal arrangement of top cover 10, four is opposite two-by-two for third protrusion 20224 and the 4th protrusion 20226.
As shown in Figure 3 and Figure 4, the first protrusion 20220 and the second protrusion 20222 can be obtained by molding mode, and two
Person gradually protrudes from the matrix surface 2024 of center portion 202, is directed toward the second protrusion along its length in the first protrusion 20220
On 20222 direction, the protrusion height of the first protrusion 20220 is gradually increased, and the second raised 20222 protrusion heights are gradually reduced.
Similarly, third protrusion 20224 and the 4th protrusion 20226 can also be obtained by molding mode, and both by
The matrix surface 2024 of center portion 202 is gradually protruded from, specifically, it is convex to be directed toward the 4th in the width direction in third protrusion 20224
It rises on 20226 direction, the protrusion height of third protrusion 20224 is gradually reduced, and the protrusion height of the 4th protrusion 20226 gradually increases
Add.
According to above description it is found that in 2020 area encompassed of indentation, since four protrusions 2022 are gradually convex
For the matrix surface 2024 of center portion 202, also, four protrusions 2022 have been separately positioned on the length of center portion 202
The two sides in direction and the two sides of width direction, therefore, on center portion 202, four protrusions 2022 orderly and the arrangement of dispersion,
When this makes secondary cell slowly produce gas, each position of center portion 202 can bear the effect of the gas under certain pressure,
It is concentrated without will lead to stress.
A kind of embodiment, please continue to refer to Fig. 3 and Fig. 4, the outer contour of the first protrusion 20220 and the second protrusion 20222
It can be respectively provided with forming V-shape, the vertex O of the V-arrangement contour line of the two is away from each other, raised from the apex of V-arrangement contour line, first
20220 and second the protrusion height of protrusion 20222 gradually increase.
By taking the first protrusion 20220 as an example, the first protrusion 20220 includes that the first inclination protrusion 20220a and the second inclination are convex
Portion 20220b, the two tilt and intersect towards close to mutual side, and the intersection of the two forms carinate pinnacle 20220c.
It can refer to, the outer contour of third protrusion 20224 and the 4th protrusion 20226 can also be respectively provided with forming V-shape, the two
V-arrangement contour line vertex O ' toward each other, at the vertex O ' of V-arrangement contour line, third protrusion 20224 and the 4th protrusion
20226 protrusion height gradually increases.
Selectable, third protrusion 20224 also may include the inclination of the first inclination protrusion 20220a and second protrusion
20220b, the two tilt and intersect towards close to mutual side, and the intersection of the two forms carinate pinnacle 20220c.
The structure of second protrusion 20222 can refer to the structure setting of the first protrusion 20220, and the 4th protrusion 20226 can be with
With reference to the structure setting of third protrusion 20224, details are not described herein again.
In above scheme, each protrusion is formed by the first inclination protrusion 20220a and the second inclination protrusion 20220b can letter
Change each raised 2022 processing technology, and due to there is material stacking phenomenon at carinate pinnacle 20220c, then the position is strong
Degree further increases, correspondingly, the ability of 202 resistance to deformation of center portion further increases.
Illustratively, first inclination protrusion 20220a and second inclination protrusion 20220b angle can be set into 135 ° ±
2 °, the size of angle determines the height of protrusion 2022, and angle is excessive or the too small cracking pressure that will affect at indentation 2020.
In addition, it should be noted that, center portion 202 is film, and the first inclination protrusion 20220a and second tilts protrusion 20220b's
The setting of angle also needs to consider the wall thickness of film.
Further, rupture pressure disc 20 can also be arranged to symmetrical structure, for example, as shown in figure 3, the first protrusion 20220 and the
Two protrusions 20222 can be symmetrical arranged with the longitudinally asymmetric center line L of rupture pressure disc 20, third protrusion 20224 and the 4th protrusion
20226 can be symmetrical arranged with the lateral symmetry center line L ' of rupture pressure disc 20.So, the first protrusion 20220 and second is convex
Rise 20222 and third protrusion 20224 and the 4th protrusion 20226 it is symmetrical two-by-two, center portion 202 can be made by each protrusion
Gas pressure suffered by 2022 each regions defined is relatively uniform.
By observing Fig. 3 it is found that in the present embodiment, the first protrusion 20220, the second protrusion 20222, third protrusion 20224
Indentation 2020 is all extended to the 4th protrusion 20226, and four head and the tail successively connect.That is, four protrusions 2022 are from quarter
It is gradually protruded at trace 2020, and four are connected, after being arranged in this way, four protrusions 2022 occupy the big portion of center portion 202
The phenomenon that region divided, then the active force for the gas that center portion 202 is subject to is more uniform, stress concentration occurs further subtracts
It is small.Also, the first protrusion 20220, the second protrusion 20222, third protrusion 20224 and the 4th protrusion 20,226 4 connect each other
Connect, play the role of reinforcing each other in resistance to deformation, when rupture pressure disc 20 is not up to cracking pressure, at indentation 2020 by
Gas pressure can further be eased, in rupture pressure disc 20 using in the shelf-life, be torn at indentation 2020
Risk further substantially reduce.
Further, as shown in figure 3, center portion 202, which is additionally provided with, reinforces trace 2026, it is arranged specifically, reinforcing trace 2026
In the area that the first protrusion 20220, the second protrusion 20222, third protrusion 20224 and the 4th protrusion 20,226 4 surround jointly
In domain, which can be molded with by way of punching press, which can increase center portion 202 and exist
The rigidity at this position is generated at indentation 2020 with increasing the ability of its resistance to deformation under gas pressure effect to reduce
Fatigue deformation, and then alleviate at indentation 2020 generate fatigue rupture.
Further, as shown in Figure 3 and Figure 4, the position where reinforcing trace 2026 can also be set and be gradually lower than central portion
The matrix surface 2024 divided, that is to say, that in the region that four protrusions 2022 surround jointly, from four circumferential directions in the region
The heart is gradually recessed.After being arranged in this way, on center portion 202, reinforcing trace 2026 and each protrusion relative to matrix surface 2024 is in
Rough pattern, when gas acts on center portion 202, the two sides of the first protrusion 20220 can decomposite two parallel and sides
To opposite component, two component are cancelled out each other, to reduce the shearing acted at the indentation 2020 of center portion 202
Power.Certainly, the second protrusion 20222, third protrusion 20224 and the 4th protrusion 20226 also have above-mentioned identical technical effect, this
Place repeats no more.
A kind of embodiment is arranged to as shown in figure 3, reinforcing trace 2026 with symmetrical two circular arcs of lateral symmetry center line L '
Shape reinforces trace, and the two intersects in apex, and the reinforcement trace 2026 of such setting can promote what four protrusions surrounded jointly
Intensity in whole region, and play the role of disperse gas pressure, it is broken to reduce the deformation generated at indentation 2020 and fatigue
It is bad.
As shown in Figure 4 and Figure 5, when formed on center portion 202 each raised 2022 and reinforce trace 2026 when, film by
Extrusion pressure or stretcher strain, at indentation 2020, the film power that is squeezed deforms, and wall thickness is smaller, when gas pressure increases
To rupture pressure disc 20 cracking pressure when, can be with the quick response pressure value at the indentation 2020, and quickly split, release stress.
In contrast, at each raised 2022, material is flowed and is accumulated under the action of forming force, so that each protrusion
2022 regions and the wall thickness for reinforcing 2026 region of trace are thicker, because at each raised 2022 and reinforcing having at trace 2026
There is the ability of stronger receiving gas pressure effect, in this way, when gas pressure is no more than the cracking pressure of rupture pressure disc 20, it is each convex
Play 2022 and reinforce trace 2026 that gas dispersion internal pressure can be played, the gas pressure inside secondary cell is low
When the cracking pressure of rupture pressure disc 20, protrusion 2022 and reinforcement trace 2026 can reduce or even avoid the generation at indentation 2020
Deformation and fatigue rupture improve the unlatching precision of rupture pressure disc 20.
Matrix table can be protruded at the highest protruding parts of a kind of embodiment, the first protrusion 20220 and the second protrusion 20222
Matrix surface can be protruded at the highest protruding parts of 3 times of face 2024~5 times, third protrusion 20224 and the 4th protrusion 20226
3 times of 2024~4 times, here, matrix surface 2024 are plane, and reference data is the lower surface of rupture pressure disc 20.The program can be with
Ensure that center portion 202 has apparent rough pattern, so that in the region that four protrusions 2022 are surrounded jointly, gas
Body pressure can decomposite the active force that shearing is played to indentation 2020, so as to further such that secondary cell in normal gas producing
The deformation at indentation 2020 is reduced, also, when internal pressure reaches the cracking pressure of rupture pressure disc 20, it can be at indentation 2020
Quickly tearing improves the reliability of rupture pressure disc 20.
For top cover 10, rupture pressure disc 20 described above is sealed in explosionproof hole 100, a kind of embodiment, marginal portion
200 are connected to the inner surface of top cover 10, also, the first protrusion 20220, the second protrusion 20222, third protrusion 20224 and
Four protrusions 20226 reinforce trace towards the side protrusion (protrusion direction is Z-direction of the Fig. 1 into Fig. 3) far from electrode assembly
Region where 2026 is recessed towards the side close to electrode assembly.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of rupture pressure disc, the explosionproof hole for sealed secondary battery top cover characterized by comprising
Marginal portion, the marginal portion are used to connect with the outer periphery of explosionproof hole edge；With
Center portion, the marginal portion surround and are connected to the center portion,
Wherein, the center portion is provided with indentation close to the region of the marginal portion, and the shape of the indentation is prevented with described
The shape of the outer contour of blast hole is identical,
In the indentation area encompassed, the upper surface of the center portion is additionally provided with protrusion, and the protrusion is gradually convex
For the matrix surface of the center portion.
2. rupture pressure disc according to claim 1, which is characterized in that the protrusion be provided with it is multiple, respectively along length
The first protrusion and the second protrusion of direction arrangement, and the third protrusion and the 4th protrusion arranged along width direction,
In first protrusion along the direction that the length direction is directed toward second protrusion, the protrusion of first protrusion is high
Degree gradually increases, and the protrusion height of second protrusion is gradually reduced,
In the third protrusion along the direction that the width direction is directed toward the 4th protrusion, the protrusion of the third protrusion is high
Degree is gradually reduced, and the protrusion height of the 4th protrusion gradually increases.
3. rupture pressure disc according to claim 2, which is characterized in that in first protrusion and second protrusion at least
One includes the first inclination protrusion and the second inclination protrusion, and the two tilts and intersects towards close mutual side, and is intersecting
Place forms carinate pinnacle,
And/or
At least one of the third protrusion and the 4th protrusion include the first inclination protrusion and the second inclination protrusion, the two
It tilts and intersects towards close mutual side, and form carinate pinnacle in intersection.
4. rupture pressure disc according to claim 3, which is characterized in that the first inclination protrusion and second inclination protrusion
Angle be 135 ° ± 2 °.
5. according to the described in any item rupture pressure discs of claim 2 to 4, which is characterized in that first protrusion and described second convex
It rises and is symmetrical arranged, the third protrusion and the 4th protrusion are symmetrical arranged.
6. according to the described in any item rupture pressure discs of claim 2 to 4, which is characterized in that first protrusion, described second convex
It rises, the third protrusion and the 4th protrusion all extend to the indentation.
7. according to the described in any item rupture pressure discs of claim 2 to 4, which is characterized in that further include being set to the center portion
Reinforcement trace, the reinforcement trace is located at first protrusion, second protrusion, the third protrusion and the 4th protrusion four
In the region that person surrounds jointly.
8. rupture pressure disc according to claim 7, which is characterized in that the position where the reinforcement trace is gradually lower than the base
Body surface face.
9. according to the described in any item rupture pressure discs of claim 2 to 4, which is characterized in that first protrusion and described second convex
3 times~5 times of described matrix surface, the highest of the third protrusion and the 4th protrusion are protruded at the highest protruding parts risen
3 times~4 times of described matrix surface are protruded at protruding parts.
10. a kind of secondary cell top cover characterized by comprising
Coping plate, the coping plate offer explosionproof hole；With
Rupture pressure disc as described in any one of claim 1 to 9, the rupture pressure disc seal the explosionproof hole,
Wherein, the indentation is set to the inner surface of the rupture pressure disc, and the protrusion is protruded towards the outside of the coping plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820459059.0U CN208460852U (en) | 2018-03-30 | 2018-03-30 | Rupture pressure disc and secondary cell top cover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820459059.0U CN208460852U (en) | 2018-03-30 | 2018-03-30 | Rupture pressure disc and secondary cell top cover |
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| CN208460852U true CN208460852U (en) | 2019-02-01 |
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| CN112713345A (en) * | 2021-03-26 | 2021-04-27 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, manufacturing method and manufacturing equipment |
| WO2021223596A1 (en) * | 2020-05-07 | 2021-11-11 | 深圳市科达利实业股份有限公司 | Power battery shell and power battery |
| CN113782877A (en) * | 2020-05-22 | 2021-12-10 | 比亚迪股份有限公司 | Battery pack and electric vehicle |
| WO2023097469A1 (en) * | 2021-11-30 | 2023-06-08 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method and manufacturing system therefor, battery and electric device |
| WO2023207402A1 (en) * | 2022-04-29 | 2023-11-02 | 宁德时代新能源科技股份有限公司 | Top cap assembly, battery cell, battery and power consuming apparatus |
| WO2023220886A1 (en) * | 2022-05-16 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | End cover, battery cell, battery, and electric device |
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| WO2021223596A1 (en) * | 2020-05-07 | 2021-11-11 | 深圳市科达利实业股份有限公司 | Power battery shell and power battery |
| CN113782877A (en) * | 2020-05-22 | 2021-12-10 | 比亚迪股份有限公司 | Battery pack and electric vehicle |
| CN112713345A (en) * | 2021-03-26 | 2021-04-27 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, manufacturing method and manufacturing equipment |
| CN112713345B (en) * | 2021-03-26 | 2021-07-16 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, manufacturing method and manufacturing equipment |
| WO2023097469A1 (en) * | 2021-11-30 | 2023-06-08 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method and manufacturing system therefor, battery and electric device |
| WO2023207402A1 (en) * | 2022-04-29 | 2023-11-02 | 宁德时代新能源科技股份有限公司 | Top cap assembly, battery cell, battery and power consuming apparatus |
| WO2023220886A1 (en) * | 2022-05-16 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | End cover, battery cell, battery, and electric device |
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