CN207731936U - A kind of mounting structure of photovoltaic module - Google Patents
A kind of mounting structure of photovoltaic module Download PDFInfo
- Publication number
- CN207731936U CN207731936U CN201721531849.7U CN201721531849U CN207731936U CN 207731936 U CN207731936 U CN 207731936U CN 201721531849 U CN201721531849 U CN 201721531849U CN 207731936 U CN207731936 U CN 207731936U
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- Prior art keywords
- substring
- assembly
- component
- subassembly area
- row
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- 238000009434 installation Methods 0.000 claims description 12
- 230000006698 induction Effects 0.000 abstract description 8
- 230000005684 electric field Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
Classifications
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a kind of mounting structures of photovoltaic module, including：N battery component string, each battery component string includes the m battery components being sequentially connected in series, each battery component string includes being electrically connected to each other and in the first assembly substring and the second component substring of two rows of arrangements, first assembly substring and the second component substring include m/2 battery component, the end of first assembly substring is equipped with positive terminal, and the end of the second component substring is equipped with negative pole end；Mounting bracket, mounting bracket are equipped with the first assembly section and the second assembly section, and the first assembly section is close to the bottom end of mounting bracket, bottom end of second assembly section far from mounting bracket；First assembly substring is set on the first assembly section, and the second component substring is set on the second assembly section；Wherein, n is the integer more than or equal to 2, and m is the even number more than or equal to 2.The negative pole end of each battery component string is integrally located at the region far from mounting bracket bottom end, reduces the probability of potential induction attenuation generation.
Description
Technical field
The utility model is related to photovoltaic module fields, more specifically to a kind of mounting structure of photovoltaic module.
Background technology
Potential induction attenuation phenomenon drastically influences the reliability and stability of crystalline silicon solar cell modules at present, can make
At component power loss up to 50% or more.Existing theory thinks after photovoltaic module is connected, due to the anode and cathode of component string
Unearthed, component string can be formed " floating potential " at this time.That is the zero potential point of component string appears among component string.For
Security consideration, component can be all grounded when mounted by metal edge frame.Therefore for the first half of component string, electricity
The metal edge frame that gesture is zero is in negative bias to component string home loop, and for the latter half of component string then exactly phase
Instead.So for the latter half component of component string, the metal edge frame of component, which produces, is directed toward component internal cell piece
Electric field, for component closer to negative pole end, bias is bigger, and electric field is bigger.The main reason for potential induction attenuation is sodium in photovoltaic module
Sodium ion on lime glass in the case where high pressure is formed by electric field to crystalline silicon solar cell piece surface and internal migration, finally with
Stacking fault defects reaction inside PN junction, forms the complex centre of deep energy level, further causes the compound of photo-generated carrier, draw
Play the sharp-decay of every electrical parameter of solar cell.
The installation of component is substantially " long horizontally-arranged assembly position " installation, i.e., all strings of one component string in photovoltaic plant at present
The component of connection is in the same horizontal position on photovoltaic module support (same row assembles position).At this moment it is mounted under photovoltaic bracket
Hold its relative humidity for being subject to closer to the component on ground bigger, while it is also big to stain dust.And when assembly surface moistening have it is wet
When gas, the conductivity of assembly surface enhances, and the electric field for being directed toward component internal cell piece by assembly surface at this time increases therewith.Especially
When assembly surface has dust, a large amount of conductive ion is contained in dust, the conductivity of assembly surface is anxious after being mixed with steam
Increase severely big, electric field also increases therewith.The migration rate of metal ion can also become larger when electric field strength becomes larger.The migration of metal ion
Rate is bigger, and metal ion more easily propagates through component glass, moves to cell piece surface, into cell piece inside cause solar cell
Every unit for electrical property parameters sharp-decay.Therefore under current photovoltaic module mounting means, potential induction occurs for photovoltaic module
The probability of decaying is larger.The way that people solve this phenomenon at present is on the mode of connection and inverter structure principle of component
It is innovated, but is produced little effect.There is presently no carry out solution prevention potential induction from the mounting means of photovoltaic module to decline
The method subtracted.
Utility model content
The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide one kind to reduce potential
The photovoltaic module battery arrangement structure of induced attenuation probability of happening.
In order to achieve the above purpose, the utility model uses the following technical solution：
A kind of mounting structure of photovoltaic module, including：
N battery component string, each battery component string include the m battery components being sequentially connected in series, each electricity
Pond component string includes being electrically connected to each other and in the first assembly substring and the second component substring of two rows of arrangements, first assembly
String and the second component substring include the m/2 battery components, and the end of the first assembly substring is equipped with positive terminal,
The end of the second component substring is equipped with negative pole end；
Mounting bracket, the mounting bracket are equipped with the first assembly section and the second assembly section, and first assembly section is close
The bottom end of the mounting bracket, the bottom end of second assembly section far from the mounting bracket；
The first assembly substring is set on first assembly section, and the second component substring is set to described second and fills
With in area；
Wherein, the n is the integer more than or equal to 2, and the m is the even number more than or equal to 2.
Preferably, first assembly section includes the first subassembly area and the second subassembly area being symmetrical set, institute
It includes the third subassembly area and the 4th subassembly area being symmetrical set to state the second assembly section；Wherein the 1st to the n-th/2
One component substring is located at first subassembly area, n-th/2+1 to n-th of first assembly substring and the 1st to the n-th/2 the
One component substring mirror image is arranged and is located at second subassembly area；1st to the n-th/2 the second component substring is located at described the
Three subassembly areas, n-th/2+1 to n-th of second component substrings and the 1st to the n-th/2 the second component substring mirror image set
It sets and is located at the 4th subassembly area；The wherein described n is even number.
Preferably, first subassembly area and second subassembly area are equipped with successively far from the mounting bracket bottom
The 1st of end drains into the n-th/2 row installation position, and third subassembly area and the 4th subassembly area are equipped with successively far from described
N-th/2+1 of mounting bracket bottom end drains into the n-th row installation position；The 1st first assembly substring is set to first subassembly
1st row in area assembles position, and the 1st the second component substring is set to n-th/2+1 row's assembly position in third subassembly area；The
The the n-th/2 row that n/2 first assembly substrings are set to first subassembly area assembles position, described the n-th/2 described second
The n-th row that component substring is set to third subassembly area assembles position.
Alternatively, first subassembly area and second subassembly area are equipped with successively far from the mounting bracket bottom end
The 1st drain into the n-th/2 row installation position, third subassembly area and the 4th subassembly area are equipped with successively far from the peace
N-th/2+1 of dress holder bottom end drains into the n-th row installation position；The 1st first assembly substring is set to first subassembly area
The 1st row assemble position, the n-th row that the 1st the second component substring is set to third subassembly area assembles position；The n-th/2
The the n-th/2 row that the first assembly substring is set to first subassembly area assembles position, the n-th/2 the second component
(n-1)th row of the string set on third subassembly area assembles position.
Preferably, the n is 4, and the m is 22.
Preferably, the positive terminal and n-th/2+1 to the n electricity of the 1st to the n-th/2 battery component string
The positive terminal of pond component string face one by one；The negative pole end and n-th/2+ of 1st to the n-th/2 battery component string
1 negative pole end to n battery component strings face one by one.
The utility model provides a kind of mounting structure of photovoltaic module, and the positive terminal of each battery component string is integrally located at
The negative pole end in the region close to mounting bracket bottom end, each battery component string is integrally located at the region far from mounting bracket bottom end,
Reduce the electric field strength between assembly surface and negative pole end, to reduce the probability of potential induction attenuation generation.
Description of the drawings
The mounting structure schematic diagram of the photovoltaic module of Fig. 1 the utility model embodiments one.
Another schematic diagram of mounting structure of the photovoltaic module of Fig. 2 the utility model embodiments one.
The mounting structure schematic diagram of the photovoltaic module of Fig. 3 the utility model embodiments two.
Another schematic diagram of mounting structure of the photovoltaic module of Fig. 4 the utility model embodiments two.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only used to explain this reality
With novel, it is not used to limit the utility model.
The technical solution of the utility model is described in detail using several specific embodiments below.
Embodiment one
As shown in Figure 1, the mounting structure of the photovoltaic module in the utility model embodiment includes n 10 He of battery component string
Mounting bracket 20, each battery component string 10 include the m battery components 11 being sequentially connected in series, and each battery component string 10 wraps
Include be electrically connected to each other and in the first assembly substring 10a and the second component substring 10b, first assembly substring 10a of two rows of arrangements and
Second component substring 10b includes m/2 battery component 11, and the end of first assembly substring 10a is equipped with positive terminal 12, second group
The end of part substring 10b is equipped with negative pole end 13；
Wherein, mounting bracket 20 is equipped with the first assembly section 21 and the second assembly section 22, and the first assembly section 21 is close to described
The bottom end of mounting bracket 20, the second bottom end of the assembly section 22 far from mounting bracket 20；First assembly substring 10a is set to the first dress
With in area 21, the second component substring 10b is set on the second assembly section 22；Wherein, n is integer more than or equal to 2, m be more than
Or the even number equal to 2.In this way so that 12 overall distribution of positive terminal of n battery component string 10 is in close to 20 bottom end of mounting bracket
Region on, and 13 overall distribution of negative pole end of n battery component string 10 in far from 20 bottom end of mounting bracket region on, can subtract
The dust of assembly surface where few negative pole end 13, reduces the conductive ion of assembly surface, to reduce assembly surface with
The electric field strength that negative pole end 13 is formed, then reducing the probability of potential induction attenuation generation.
Specifically, the first assembly section 21 includes the first subassembly area 21a being symmetrical set and the second subassembly area
21b, the second assembly section 22 include the third subassembly area 22a and the 4th subassembly area 22b being symmetrical set.Wherein the 1st
To the n-th/2 first assembly substring 10a be located at the first subassembly area 21a, n-th/2+1 to n-th first assembly substring 10a with
1st to the n-th/2 first assembly substring 10a mirror image is arranged and is located at the second subassembly area 21b.1st to the n-th/2 second
Component substring 10b be located at third subassembly area 22a, n-th/2+1 to n-th second component substring 10b and the 1st to the
N/2 the second component substring 10b mirror images are arranged and are located at the 4th subassembly area 22b；The wherein described n is even number.
Further, the first subassembly area 21a and the second subassembly area 21b are equipped with successively far from 20 bottom end of mounting bracket
The 1st drain into the n-th/2 row installation position, third subassembly area 22a and the 4th subassembly area 22b are equipped with successively far from mounting bracket
N-th/2+1 of 20 bottom ends drains into the n-th row installation position.1st first assembly substring 10a is set on first subassembly area 21a's
1st row assembles position, and the 1st the second component substring 10b is set on n-th/2+1 row's assembly position of third subassembly area 22a；The n-th/2
First assembly substring 10a assembles position set on the n-th/2 row of the first subassembly area 21a, and the n-th/2 the second component substring 10b is set
Position is assembled in the n-th row of third subassembly area 22a.
As a preferred embodiment, as shown in Fig. 2, n is preferably 4, m is preferably 22.First assembly substring 10a includes the 1st
To the 11st battery component 11, positive terminal 12 is set on the 1st battery component 11, and the second component substring 10b includes the 12nd
To the 22nd battery component 11, negative pole end 13 is set on the 22nd battery component 11.1st and the 2nd first assembly substring
10a is set in turn in the 1st row of the first subassembly area 21a and the 2nd row assembles on position, the 1st and the 2nd the second component substring
10b is set in turn in the 3rd row of third subassembly area 22a and the 4th row assembles on position.3rd and the 4th first assembly substring
10a is set in turn in the 1st row of the second subassembly area 21b and the 2nd row assembles on position, the 3rd and the 4th the second component substring
10b is set in turn in the 3rd row of the 4th subassembly area 22b and the 4th row assembles on position.
Further, the 1st positive terminal 12 and n-th/2+1 to n-th battery component to the n-th/2 battery component string 10
The face one by one of positive terminal 12 of string 10.1st electric to the negative pole end 13 of the n-th/2 battery component string 10 and n-th/2+1 to n-th
The negative pole end 13 of pond component string 10 face one by one.Reduce so each battery component string 10 positive terminal 12 and negative pole end 13 it
Between distance so that the output cord of positive terminal 12 and negative pole end 13 is centrally placed, and reduces 70% or more cable dosage, and
And it is easily installed maintenance, while system cable loss is reduced, degree of reducing electricity cost.
Embodiment two
As shown in figure 3, the present embodiment and embodiment one the difference is that, the 1st first assembly substring 10a is set to
The 1st row of first subassembly area 21a assembles position, and the 1st the second component substring 10b is set to the n-th row of third subassembly area 22a
Assemble position.The n-th/2 first assembly substring 10a be set to the first subassembly area 21a the n-th/2 row assemble position, the n-th/2 second
The (n-1)th row that component substring 10b is set to third subassembly area 22a assembles position.
As a preferred embodiment, as shown in figure 4, n preferably 4, m are preferably 22.1st first assembly substring 10a is set to
The 1st row of first subassembly area 21a assembles position, and the 1st the second component substring 10b is set to the 4th row of third subassembly area 22a
Assemble position.The 2nd row that 2nd first assembly substring 10a is set to the first subassembly area 21a assembles position, the 2nd the second component
The 3rd row that string 10b is set to third subassembly area 22a assembles position.3rd first assembly substring 10a is set to the second subassembly
The 1st row of area 21b assembles position, and the 4th row that the 3rd the second component substring 10b is set to the 4th subassembly area 22b assembles position.4th
The 2nd row that a first assembly substring 10a is set to the second subassembly area 21b assembles position, the 4th the second component substring 10b setting
Position is assembled in the 3rd row of the 4th subassembly area 22b.
The utility model provides a kind of mounting structure of photovoltaic module, and the positive terminal of each battery component string is integrally located at
The negative pole end in the region close to mounting bracket bottom end, each battery component string is integrally located at the region far from mounting bracket bottom end,
Reduce the electric field strength between assembly surface and negative pole end, to reduce the probability of potential induction attenuation generation.
Specific embodiment of the present utility model is described in detail above, although having show and described some realities
Example is applied, it will be understood by those skilled in the art that not departing from defined by the claims and their equivalents practicality
In the case of novel principle and spirit, it can modify to these embodiments and perfect, these modifications and improve also should be
In the scope of protection of the utility model.
Claims (6)
1. a kind of mounting structure of photovoltaic module, which is characterized in that including：
N battery component string (10), each battery component string (10) include the m battery components (11) being sequentially connected in series, often
A battery component string (10) includes being electrically connected to each other and in the first assembly substring (10a) of two rows of arrangements and the second component
It goes here and there (10b), the first assembly substring (10a) and the second component substring (10b) include the m/2 battery components
(11), the end of the first assembly substring (10a) is equipped with positive terminal (12), and the end of the second component substring (10b) is set
There is negative pole end (13)；
Mounting bracket (20), the mounting bracket (20) are equipped with the first assembly section (21) and the second assembly section (22), and described the
One assembly section (21) is close to the bottom end of the mounting bracket (20), and second assembly section (22) is far from the mounting bracket (20)
Bottom end；
The first assembly substring (10a) is set on first assembly section (21), and the second component substring (10b) is set to
On second assembly section (22)；
Wherein, the n is the integer more than or equal to 2, and the m is the even number more than or equal to 2.
2. the mounting structure of photovoltaic module according to claim 1, which is characterized in that first assembly section (21) includes
The the first subassembly area (21a) and the second subassembly area (21b) being symmetrical set, second assembly section (22) include left and right
Symmetrically arranged third subassembly area (22a) and the 4th subassembly area (22b)；Wherein the 1st to the n-th/2 first assembly substring
(10a) is located at first subassembly area (21a), n-th/2+1 to n-th first assembly substring (10a) with the 1st to n-th/
2 first assembly substring (10a) mirror images are arranged and are located at second subassembly area (21b)；1st to the n-th/2 second group
Part substring (10b) is located at third subassembly area (22a), n-th/2+1 to n-th second component substrings (10b) with the 1st
To the n-th/2 the second component substring (10b) mirror image setting and it is located at the 4th subassembly area (22b)；The wherein described n is
Even number.
3. the mounting structure of photovoltaic module according to claim 2, which is characterized in that first subassembly area (21a)
With second subassembly area (21b) be equipped with successively far from the mounting bracket (20) bottom end the 1st drain into the n-th/2 row installation
Position, third subassembly area (22a) and the 4th subassembly area (22b) are equipped with successively far from the mounting bracket (20)
N-th/2+1 of bottom end drains into the n-th row installation position；The 1st first assembly substring (10a) is set to first subassembly area
1st row of (21a) assembles position, and the 1st the second component substring (10b) is set to the n-th/2 of third subassembly area (22a)
+ 1 row assembles position；The the n-th/2 row that the n-th/2 first assembly substring (10a) is set to first subassembly area (21a) assembles
Position, the n-th row that the n-th/2 the second component substring (10b) is set to third subassembly area (22a) assemble position.
4. the mounting structure of photovoltaic module according to claim 2, which is characterized in that first subassembly area (21a)
With second subassembly area (21b) be equipped with successively far from the mounting bracket (20) bottom end the 1st drain into the n-th/2 row installation
Position, third subassembly area (22a) and the 4th subassembly area (22b) are equipped with successively far from the mounting bracket (20)
N-th/2+1 of bottom end drains into the n-th row installation position；The 1st first assembly substring (10a) is set to first subassembly area
1st row of (21a) assembles position, and the 1st the second component substring (10b) is set to n-th row in third subassembly area (22a)
Assemble position；The the n-th/2 row that the n-th/2 first assembly substring (10a) is set to first subassembly area (21a) assembles position,
The (n-1)th row that the n-th/2 the second component substring (10b) is set to third subassembly area (22a) assembles position.
5. the mounting structure of photovoltaic module according to claim 3 or 4, which is characterized in that the n is 4, and the m is 22.
6. the mounting structure of photovoltaic module according to claim 3 or 4, which is characterized in that the 1st to described in the n-th/2
The positive terminal (12) of battery component string (10) and the n-th/2+1 positive terminals to the n battery component strings (10)
(12) face one by one；The negative pole end (13) of 1st to the n-th/2 battery component string (10) is a to n with n-th/2+1
The negative pole end (13) of the battery component string (10) face one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721531849.7U CN207731936U (en) | 2017-11-16 | 2017-11-16 | A kind of mounting structure of photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721531849.7U CN207731936U (en) | 2017-11-16 | 2017-11-16 | A kind of mounting structure of photovoltaic module |
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| Publication Number | Publication Date |
|---|---|
| CN207731936U true CN207731936U (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721531849.7U Withdrawn - After Issue CN207731936U (en) | 2017-11-16 | 2017-11-16 | A kind of mounting structure of photovoltaic module |
Country Status (1)
| Country | Link |
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| CN (1) | CN207731936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768455A (en) * | 2017-11-16 | 2018-03-06 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | A kind of mounting structure of photovoltaic module |
-
2017
- 2017-11-16 CN CN201721531849.7U patent/CN207731936U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107768455A (en) * | 2017-11-16 | 2018-03-06 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | A kind of mounting structure of photovoltaic module |
| CN107768455B (en) * | 2017-11-16 | 2023-06-23 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | Mounting structure of photovoltaic module |
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Effective date of registration: 20190823 Address after: 810000 No. 43 Wusi West Road, Chengxi District, Xining City, Qinghai Province Patentee after: QINGHAI HUANGHE NEW ENERGY SYSTEMS INTEGRATION ENGINEERING Co.,Ltd. Address before: 810007 Kunlun East Road, Xining economic and Technological Development Zone, Qinghai, China, No. 20, No. Patentee before: PHOTOVOLTAIC INDUSTRY TECHNOLOGY BRANCH OF QINGHAI HUANGHE HYDROPOWER DEVELOPMENT Co.,Ltd. |
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Effective date of registration: 20201026 Address after: 810000 No.10 photovoltaic industry supporting Park of small and medium sized enterprises in Xining Economic and Technological Development Zone, Xining City, Qinghai Province Patentee after: State Power Investment Group Qinghai Photovoltaic Industry Innovation Center Co.,Ltd. Patentee after: Qinghai Yellow River Photovoltaic System Design Consulting Co.,Ltd. Address before: 810000 No. 54 West 43, Chengxi District, Qinghai City, Xining Province Patentee before: QINGHAI HUANGHE NEW ENERGY SYSTEMS INTEGRATION ENGINEERING Co.,Ltd. |
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Granted publication date: 20180814 Effective date of abandoning: 20230623 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180814 Effective date of abandoning: 20230623 |