CN112549942A - Power battery installation component and car - Google Patents
Power battery installation component and car Download PDFInfo
- Publication number
- CN112549942A CN112549942A CN202011393347.9A CN202011393347A CN112549942A CN 112549942 A CN112549942 A CN 112549942A CN 202011393347 A CN202011393347 A CN 202011393347A CN 112549942 A CN112549942 A CN 112549942A
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- mounting
- installation
- frame
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- guide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
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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
Abstract
The invention discloses a power battery installation component and an automobile, wherein the power battery installation component comprises an installation frame, a battery component and a guiding locking structure, the installation frame is used for being installed on an automobile body, a frame opening is formed in the installation frame, the battery component comprises an installation shell, the installation shell is suspended on the installation frame and at least partially exposed to the frame opening, the guiding locking structure is arranged between the installation frame and the installation shell and used for guiding the installation of the installation shell and the installation frame in an alignment mode and enabling the installation shell and the installation frame to be locked and fixed, when the battery component is disassembled or maintained, only the installation shell needs to be disassembled from the installation frame, when a new battery component is re-installed, the alignment can be quickly realized through the guiding locking structure and the battery component can be quickly locked and fixed, the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a power battery installation assembly and an automobile.
Background
In the prior art, a common power battery assembly is troublesome to replace, cannot meet the requirement of quick replacement and maintenance, and needs to be optimized.
Disclosure of Invention
The invention mainly aims to provide a power battery mounting assembly and an automobile, aiming at optimizing the structure of the power battery mounting assembly so as to be beneficial to replacement and maintenance of a power battery.
In order to achieve the above object, the present invention provides a power battery mounting assembly, including:
a mounting frame for mounting to a vehicle body, the mounting frame being formed with a frame opening;
the battery assembly comprises a mounting shell, the mounting shell is suspended on the mounting frame and at least partially exposed to the frame opening; and the number of the first and second groups,
the guiding locking structure is arranged between the mounting frame and the mounting shell and used for guiding the mounting shell to be aligned and mounted with the mounting frame and enabling the mounting shell to be locked and fixed with the mounting frame.
Optionally, the guiding and locking structure comprises:
the guide mounting hole penetrates through the mounting frame;
the nut sleeve is sleeved at the upper end of the guide mounting hole;
the guide sleeve is arranged on the mounting shell and is provided with a guide section which is arranged on the upper end surface of the mounting shell in a protruding mode, and the guide section is sleeved at the lower end of the guide mounting hole; and the number of the first and second groups,
and the threaded end of the locking screw rod penetrates through the inner cavity of the guide sleeve and is arranged in the inner cavity of the nut sleeve.
Optionally, a first guide inclined plane is arranged on the inner wall surface of the lower end of the guide mounting hole, and a second guide inclined plane is arranged on the outer side surface of the guide section corresponding to the first guide inclined plane; and/or the presence of a gas in the gas,
the nut sleeve is detachably mounted on the mounting frame through a threaded connection structure; and/or the presence of a gas in the gas,
the guide sleeve is detachably mounted on the mounting shell through a rivet connecting structure.
Optionally, the inner wall surface of the guide mounting hole is arranged in a step shape, and the guide mounting hole comprises a first mounting hole section and a second mounting hole section which are distributed in the vertical direction and are arranged in a large-size mode;
the outer side surface of the nut sleeve is arranged in a step manner, the nut sleeve comprises a first sleeve body section and a second sleeve body section which are distributed in the vertical direction and are arranged in a large-size mode, the first sleeve body section is installed in the first installation hole section in a rotation-stopping mode, and the second sleeve body section is sleeved on the second installation hole section;
the guide section is arranged on the second mounting hole section.
Optionally, a placement hole penetrates through the installation shell, the placement hole is arranged in a step shape, and the placement hole comprises a first placement hole section and a second placement hole section which are distributed in the vertical direction and are arranged in a small-sized manner;
the outer side surface of the guide sleeve is arranged in a step shape, the guide sleeve comprises a first installation section and a second installation section which are distributed in the vertical direction and are arranged in a large-size mode, the first installation section is sleeved on the first installation hole section, and the second installation section is installed in the second installation hole section in a rotation stopping mode;
the guide section is formed at the first mounting section.
Optionally, the guide locking structures are provided in plurality and are arranged at intervals in the circumferential direction of the mounting frame.
Optionally, the power battery mounting assembly further includes a first positioning structure, where the first positioning structure includes a first frame positioning hole and a shell positioning hole respectively correspondingly disposed between the mounting frame and the mounting shell, and a first positioning pin penetrating through the first frame positioning hole and the shell positioning hole; and/or the presence of a gas in the gas,
the power battery installation component further comprises a second positioning structure, the second positioning structure comprises a second frame positioning hole arranged on the installation frame, and the second frame positioning hole is used for correspondingly positioning through a positioning pin and an automobile body positioning hole arranged on an automobile body.
Optionally, the first positioning structure and/or the second positioning structure are provided in plurality.
Optionally, the mounting frame has two opposite mounting frame sides distributed along a width direction thereof, wherein:
the first positioning structures are respectively arranged on the two mounting frame edges; and/or the presence of a gas in the gas,
the second positioning structures are respectively arranged on the two mounting frame edges.
The invention also proposes an automobile comprising a power battery mounting assembly comprising:
a mounting frame for mounting to a vehicle body, the mounting frame being formed with a frame opening;
the battery assembly comprises a mounting shell, the mounting shell is suspended on the mounting frame and at least partially exposed to the frame opening; and the number of the first and second groups,
the guiding locking structure is arranged between the mounting frame and the mounting shell and used for guiding the mounting shell to be aligned and mounted with the mounting frame and enabling the mounting shell to be locked and fixed with the mounting frame.
According to the technical scheme provided by the invention, the mounting frame is used for being mounted to a vehicle body, the mounting shell is suspended on the mounting frame, the guiding and locking structure is arranged between the mounting frame and the mounting shell and used for guiding the mounting shell and the mounting frame to be aligned and fixed, the mounting shell and the mounting frame are locked and fixed, when the battery assembly is dismounted or maintained, only the mounting shell needs to be dismounted from the mounting frame, when a new battery assembly is remounted, the alignment can be quickly realized through the guiding and locking structure, the battery assembly is quickly locked and fixed, and the operation efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective exploded view of a power battery mounting assembly according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the mounting frame of FIG. 1;
FIG. 3 is a schematic view, partly in section, of the mounting frame and mounting housing assembly of FIG. 1;
FIG. 4 is a schematic perspective view of the assembly of the mounting frame and the nut sleeve of FIG. 1;
fig. 5 is a schematic perspective view of the installation housing and the guide sleeve in fig. 1.
The reference numbers illustrate:
the object of the present invention, its functional characteristics and advantageous effects will be further described with reference to the following embodiments and drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In the prior art, a common power battery assembly is troublesome to replace, cannot meet the requirement of quick replacement and maintenance, and needs to be optimized.
In view of the above, the present invention provides an automobile including a power battery installation assembly, and it is within the scope of the present invention that the automobile includes the power battery installation assembly, wherein fig. 1 to 5 are schematic diagrams of an embodiment of the power battery installation assembly provided by the present invention.
Referring to fig. 1 to 3, the power battery mounting assembly 100 includes a mounting frame 1, a battery assembly 2 and a guiding and locking structure 3, where the mounting frame 1 is configured to be mounted to a vehicle body, a frame opening 11 is formed in the mounting frame 1, the battery assembly 2 includes a mounting housing 21, the mounting housing 21 is suspended in the mounting frame 1, and at least a portion of the mounting housing 21 is exposed to the frame opening 11, and the guiding and locking structure 3 is disposed between the mounting frame 1 and the mounting housing 21, and is configured to guide the mounting housing 21 to be aligned with the mounting frame 1, and lock and fix the mounting housing 21 and the mounting frame 1.
In the technical scheme provided by the invention, the mounting frame 1 is used for being mounted to a vehicle body, the mounting shell 21 is suspended on the mounting frame 1, the guiding and locking structure 3 is arranged between the mounting frame 1 and the mounting shell 21 and used for guiding the mounting shell 21 and the mounting frame 1 to be mounted in an aligned mode and enabling the mounting shell 21 and the mounting frame 1 to be locked and fixed, when the battery component 2 is dismounted or maintained, only the mounting shell 21 needs to be dismounted from the mounting frame 1, when a new battery component 2 is remounted, the alignment can be quickly realized and the battery component can be quickly locked and fixed through the guiding and locking structure 3, and the operation efficiency is improved.
The guiding and locking structure 3 is used to guide the installation housing 21 and the installation frame 1 to be installed in a contraposition, and the installation housing 21 and the installation frame 1 are locked and fixed, the guiding structure and the locking structure may be respectively disposed at different positions corresponding to the installation frame 1, or may be disposed at the same position corresponding to the installation frame 1, in an embodiment, referring to fig. 3 to 5, the guiding and locking structure 3 includes a guiding installation hole 31, a nut sleeve 32, a guiding sleeve 33, and a locking screw 34, the guiding installation hole 31 is disposed through the installation frame 1, the nut sleeve 32 is sleeved on an upper end of the guiding installation hole 31, the guiding sleeve 33 is disposed on the installation housing 21 and has a guiding section 331 protruding from an upper end surface of the installation housing 21, the guiding section 331 is sleeved on a lower end of the guiding installation hole 31, a threaded end of the locking screw 34 penetrates through an inner cavity of the guiding sleeve 33, and is installed in the inner cavity of the nut sleeve 32, the nut sleeve 32 is firstly installed in the guide installation hole 31, when the battery assembly 2 is installed, the installation shell 21 is installed in a contraposition manner from bottom to top, at this moment, the guide sleeve 33 and the guide installation hole 31 play a role in guiding, the threaded end of the locking screw 34 is penetrated through the inner cavity of the guide sleeve 33 and installed in the inner cavity of the nut sleeve 32, the installation shell 21 is fixed on the installation frame 1, and the installation and the fixation are convenient and fast.
It should be noted that, in order to facilitate the guide sleeve 33 to be inserted into the guide mounting hole 31, in an embodiment, the inner wall surface of the lower end of the guide mounting hole 31 is provided with a first guide inclined surface 311, the outer side surface of the guide section 331 is provided with a second guide inclined surface 3311 corresponding to the first guide inclined surface 311, and by matching the first guide inclined surface 311 and the second guide inclined surface 3311, the guide sleeve 33 can be quickly inserted into the guide mounting hole 31, so as to facilitate quick alignment between the mounting housing 21 and the mounting frame 1.
In an embodiment, the nut sleeve 32 is detachably mounted on the mounting frame 1 through a threaded connection structure, for example, the nut sleeve 32 can be directly locked on the mounting frame 1 through a locking bolt, a locking screw and other structures, so that the mounting is simple and the fixation is firm.
In the process of aligning and mounting the battery assembly 2 and the mounting housing 21, there is a horizontal shake, which may cause the threaded connection structure to receive an instantaneous impact shear force, and is not favorable for structural stability, in an embodiment, the inner wall of the guide mounting hole 31 is arranged in a step shape, the guide mounting hole 31 includes a first mounting hole section 312 and a second mounting hole section 313 which are distributed in an up-down direction and are arranged in a large-down direction, the outer side of the nut sleeve 32 is arranged in a step shape, the nut sleeve 32 includes a first sleeve section 321 and a second sleeve section 322 which are distributed in an up-down direction and are arranged in a large-down direction, the first sleeve section 321 is rotatably mounted in the first mounting hole section 312, the second sleeve section 322 is sleeved on the second mounting hole section 313, the guide section 331 is disposed on the second mounting hole section 313, and thus in the process of aligning and mounting the battery assembly 2 and the mounting housing 21, the first mounting hole section 312 and the first sleeve section 321 are matched to play a role in counteracting impact shearing force, and the overall stability of the structure is good.
Before the battery assembly 2 is mounted on the mounting frame 1, the guide sleeve 33 needs to be mounted on the mounting housing 21, and in an embodiment, the guide sleeve 33 is detachably mounted on the mounting housing 21 through a rivet connection structure, such as a connection rivet, so that quick mounting can be achieved.
In addition, in the process of aligning and mounting the battery assembly 2 to the mounting housing 21, there is a horizontal shake, which may cause the rivet connection structure to receive an instantaneous impact shear force, and is not beneficial to the structural stability, in an embodiment, the mounting housing 21 is provided with a mounting hole 21a through, the mounting hole 21a is arranged in a step shape, the mounting hole 21a includes a first mounting hole section 211 and a second mounting hole section 212 which are distributed in an up-down direction and are arranged in a small-up direction, an outer side of the guide sleeve 33 is arranged in a step shape, the guide sleeve 33 includes a first mounting section 332 and a second mounting section 333 which are distributed in an up-down direction and are arranged in a small-up direction, the first mounting section 332 is sleeved on the first mounting hole section 211, the second mounting section 333 is installed in the second mounting hole section 212 in a rotation-stop manner, the guide section 331 is formed on the first mounting section 332, thus, in the process of aligning and mounting the battery assembly 2 and the mounting housing 21, the cooperation between the second mounting section 333 and the second mounting hole section 212 can counteract the impact shearing force, and the overall stability of the structure is good.
Installing frame 1 with the fixed connection point of installing frame 21 needs to set up a plurality ofly, and the number of tie point sets up more, and is more firm in connection, and in one embodiment, direction locking structure 3 sets up a plurality ofly, and follows the interval sets up in the circumference of installing frame 1, so, has improved installing frame 21 with the stability that installing frame 1 is connected, what need explain is that, when the number of tie point is more, can bring the trouble of counterpointing, consequently, in one embodiment, sets up 8 tie points, promptly direction locking structure 3 sets up 8 set up 3 on each long frame edge of installing frame 1, set up 2 on each short frame edge.
The guiding cooperation of the guiding sleeve 33 and the guiding mounting hole 31 is a fine positioning structure, and a coarse positioning structure may also be provided during the installation process, in an embodiment, the power battery installation component 100 further includes a first positioning structure 4, the first positioning structure 4 includes a first frame positioning hole 41 and a shell positioning hole respectively and correspondingly disposed between the installation frame 1 and the installation shell 21, and a first positioning pin inserted into the first frame positioning hole 41 and the shell positioning hole, the coarse positioning of the installation shell 21 and the installation frame 1 can be realized by inserting the first positioning pin into the first frame positioning hole 41 and the shell positioning hole, and after the coarse positioning is completed, the fine positioning can be realized, and the installation can be completed quickly.
Of course, the first positioning structures 4 may be further provided in multiple numbers, for example, 2 or 3, and the number of the first positioning structures 4 is larger as much as possible, and the swing amplitude of the side is larger in the installation process, specifically, the installation frame 1 has two opposite installation frame edges 12 distributed along the width direction thereof, wherein the first positioning structures 4 are respectively provided on the two installation frame edges 12, so that the rough positioning between the installation shell 21 and the installation frame 1 can be rapidly completed, and a better effect is achieved.
Certainly, can also with installing frame 1 installs in the automobile body or dismantles from the automobile body, and at this in-process, also need location structure, in an embodiment, power battery installation component 100 still includes second location structure 5, second location structure 5 is including locating second frame locating hole 51 on installing frame 1, second frame locating hole 51 is used for corresponding the location through locating pin and the automobile body locating hole of locating on the automobile body, through with the locating pin inserts second frame locating hole 51 with can realize in the automobile body locating hole install frame 1 to the automobile body fast on, have better effect.
Of course, the second positioning structures 5 may be provided in plural, for example, 2, 3, 4, etc., and the second positioning structures 5 with a larger number are provided on one side corresponding to the long frame side as much as possible, so that the swing amplitude of the side in the installation process is larger, specifically, the installation frame 1 has two opposite installation frame sides 12 distributed along the width direction thereof, wherein the second positioning structures 5 are respectively provided on the two installation frame sides 12, so that the rough positioning of the vehicle body and the installation frame 1 can be rapidly completed, and a better effect is achieved.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power battery mounting assembly, comprising:
a mounting frame for mounting to a vehicle body, the mounting frame being formed with a frame opening;
the battery assembly comprises a mounting shell, the mounting shell is suspended on the mounting frame and at least partially exposed to the frame opening; and the number of the first and second groups,
the guiding locking structure is arranged between the mounting frame and the mounting shell and used for guiding the mounting shell to be aligned and mounted with the mounting frame and enabling the mounting shell to be locked and fixed with the mounting frame.
2. The power battery mounting assembly of claim 1, wherein the guide locking structure comprises:
the guide mounting hole penetrates through the mounting frame;
the nut sleeve is sleeved at the upper end of the guide mounting hole;
the guide sleeve is arranged on the mounting shell and is provided with a guide section which is arranged on the upper end surface of the mounting shell in a protruding mode, and the guide section is sleeved at the lower end of the guide mounting hole; and the number of the first and second groups,
and the threaded end of the locking screw rod penetrates through the inner cavity of the guide sleeve and is arranged in the inner cavity of the nut sleeve.
3. The power battery mounting assembly according to claim 2, wherein the inner wall surface of the lower end of the guide mounting hole is provided with a first guide slope, and the outer side surface of the guide section is provided with a second guide slope corresponding to the first guide slope; and/or the presence of a gas in the gas,
the nut sleeve is detachably mounted on the mounting frame through a threaded connection structure; and/or the presence of a gas in the gas,
the guide sleeve is detachably mounted on the mounting shell through a rivet connecting structure.
4. The power battery mounting assembly of claim 2, wherein the inner wall surface of the guide mounting hole is arranged in a step shape, and the guide mounting hole comprises a first mounting hole section and a second mounting hole section which are distributed in an up-down direction and are arranged in a large-down direction;
the outer side surface of the nut sleeve is arranged in a step manner, the nut sleeve comprises a first sleeve body section and a second sleeve body section which are distributed in the vertical direction and are arranged in a large-size mode, the first sleeve body section is installed in the first installation hole section in a rotation-stopping mode, and the second sleeve body section is sleeved on the second installation hole section;
the guide section is arranged on the second mounting hole section.
5. The power battery installation assembly of claim 2, wherein the installation shell is provided with a plurality of installation holes, the installation holes are arranged in a step shape, and each installation hole comprises a first installation hole section and a second installation hole section which are distributed in an up-down direction and are arranged in a small-top-large-bottom manner;
the outer side surface of the guide sleeve is arranged in a step shape, the guide sleeve comprises a first installation section and a second installation section which are distributed in the vertical direction and are arranged in a large-size mode, the first installation section is sleeved on the first installation hole section, and the second installation section is installed in the second installation hole section in a rotation stopping mode;
the guide section is formed at the first mounting section.
6. The power battery mounting assembly of claim 1, wherein the guide locking structure is provided in plurality and spaced apart along a circumferential direction of the mounting frame.
7. The power battery mounting assembly of claim 1, further comprising a first locating structure, wherein the first locating structure comprises a first frame locating hole and a housing locating hole respectively disposed between the mounting frame and the mounting housing, and a first locating pin disposed through the first frame locating hole and the housing locating hole; and/or the presence of a gas in the gas,
the power battery installation component further comprises a second positioning structure, the second positioning structure comprises a second frame positioning hole arranged on the installation frame, and the second frame positioning hole is used for correspondingly positioning through a positioning pin and an automobile body positioning hole arranged on an automobile body.
8. The power battery mounting assembly of claim 7, wherein the first locating structure and/or the second locating structure are provided in plurality.
9. The power battery mounting assembly of claim 7, wherein the mounting frame has two opposing mounting frame sides distributed across its width, wherein:
the first positioning structures are respectively arranged on the two mounting frame edges; and/or the presence of a gas in the gas,
the second positioning structures are respectively arranged on the two mounting frame edges.
10. A motor vehicle, characterized by comprising a power battery mounting assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011393347.9A CN112549942B (en) | 2020-12-02 | 2020-12-02 | Power battery installation component and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011393347.9A CN112549942B (en) | 2020-12-02 | 2020-12-02 | Power battery installation component and car |
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| Publication Number | Publication Date |
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| CN112549942A true CN112549942A (en) | 2021-03-26 |
| CN112549942B CN112549942B (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011393347.9A Active CN112549942B (en) | 2020-12-02 | 2020-12-02 | Power battery installation component and car |
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| CN113212138A (en) * | 2021-04-06 | 2021-08-06 | 东风柳州汽车有限公司 | Battery package installation component and electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113212138A (en) * | 2021-04-06 | 2021-08-06 | 东风柳州汽车有限公司 | Battery package installation component and electric automobile |
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| Publication number | Publication date |
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| CN112549942B (en) | 2022-02-25 |
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