CN212695280U - Battery and battery module - Google Patents
Battery and battery module Download PDFInfo
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- CN212695280U CN212695280U CN202021393284.2U CN202021393284U CN212695280U CN 212695280 U CN212695280 U CN 212695280U CN 202021393284 U CN202021393284 U CN 202021393284U CN 212695280 U CN212695280 U CN 212695280U
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- battery
- electric core
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- 238000003466 welding Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 239000003792 electrolyte Substances 0.000 abstract description 19
- 230000005611 electricity Effects 0.000 abstract description 13
- 101100460844 Mus musculus Nr2f6 gene Proteins 0.000 description 31
- 230000006872 improvement Effects 0.000 description 7
- 230000007306 turnover Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model belongs to the technical field of the battery production is made, concretely relates to battery, including a plurality of electricity core (1), at least one both sides or one side of electricity core (1) are provided with a plurality of utmost point ear (2), and are adjacent according to the same polarity between electricity core (1) utmost point ear (2) interconnect, a plurality of electricity core (1) parallel connection forms electric core group (3) in proper order. The utility model discloses a parallelly connected structure of electricity core can increase electric core length, promotes electric core capacity, still avoids the too high electrolyte that leads to of voltage to decompose.
Description
Technical Field
The utility model belongs to the technical field of the battery production is made, concretely relates to battery and battery module.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. The requirement of electric core energy density is higher and higher, and under the similar condition of chemical system, it is an effectual mode to promote monomer electric core capacity, and monomer electric core reaches the purpose of promoting the capacity through increasing the casing size, because passenger car height is limited, promotes electric core casing size generally through increasing thickness or increase length, but increases thickness and can lead to electric core heat dispersion to worsen, and the cycle performance worsens. Thus, by increasing the cell length, it is an effective way.
However, the inventor finds that the existing scheme has at least the following defects: as the length increases, the difficulty of the manufacturing process increases, and the voltage is too high when the cells are connected in series, resulting in decomposition of the electrolyte.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: to prior art's not enough, provide a battery, adopt the parallelly connected structure of electric core, can increase electric core length, promote electric core capacity, still avoid the too high electrolyte that leads to of voltage to decompose.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the battery comprises a plurality of battery cells, wherein a plurality of lugs are arranged on two sides or one side of at least one battery cell, the adjacent battery cells are mutually connected according to the lugs with the same polarity, and the battery cells are sequentially connected in parallel to form a battery core group.
As an improvement of the battery, the tab of the electric core group is provided with an insulation structure.
As an improvement of the battery of the present invention, the battery is located at one end of the battery core set, the single side of the battery core is disposed with the tab.
As an improvement of the battery, one end of the electric core group, the electrode lugs are assembled into a general electrode through the top cover.
As an improvement of a battery, a plurality of the both sides of electricity core all set up utmost point ear, every side utmost point ear includes anodal ear and negative pole ear.
As an improvement of the battery, the battery cell one side the number of the electrode lugs is larger than or equal to the battery cell opposite side the number of the electrode lugs.
As an improvement of the battery of the present invention, it is adjacent that the polarities of the tabs are different.
As an improvement of the battery of the present invention, the battery further includes a housing, the two sides of the housing are provided with openings, and the cell assembly is accommodated in the housing.
The fixed connection mode between the lugs of the adjacent battery cells comprises welding, riveting or magnetic connection.
The second objective of the present invention is to provide a battery module, including the above-mentioned battery.
The beneficial effects of the utility model reside in that, the utility model discloses a plurality of electricity core, at least one both sides or one side of electricity core are provided with a plurality of utmost point ears, and are adjacent according to same polarity between the electricity core utmost point ear interconnect, a plurality of electricity core parallel connection forms the electric core group in proper order. Because the manufacturing process difficulty is increased along with the increase of the length, and the electrolyte is decomposed due to overhigh voltage when the battery cores are connected in series, the battery cores with the lugs at two sides are connected with each other according to the lugs with the same polarity to form a battery core group in parallel, so that the capacity of the battery can be improved on the premise of keeping the voltage unchanged, and the situation that the electrolyte is decomposed due to overhigh voltage caused by the series connection of the battery cores can be avoided; meanwhile, only a plurality of battery cores are connected in parallel in sequence, so that a partition plate for blocking electrolyte is omitted from being arranged between the battery cores, the production process is simplified, the production process difficulty of the battery is reduced, and the production cost of the battery is reduced; the battery cell is provided with a plurality of tabs, and the quantity of leading out through the tab in increasing the battery cell reduces the internal resistance of the battery cell, improves the overcurrent capacity of the battery, wherein, the tab between the adjacent battery cells is through welding or riveted mode fixed connection, helps improving the steadiness between the adjacent battery cells, reduces the probability that the adjacent battery cells break down. The utility model discloses a parallelly connected structure of electricity core can increase electric core length, promotes electric core capacity, still avoids the too high electrolyte that leads to of voltage to decompose.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is an exploded view of a first embodiment of the present invention.
Fig. 3 is a schematic view of the structure of the tab on both sides of the battery cell according to the first embodiment of the present invention.
Fig. 4 is an exploded view of a second embodiment of the present invention.
Fig. 5 is a schematic view of a single-side tab of a battery cell according to a second embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 7 is an exploded view of a third embodiment of the present invention.
Wherein: 1-electric core; 2-pole ear; 3-electric core group; 4-total electrode; 5-a shell; 21-positive tab; 22-negative tab.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to fig. 1 to 7, but the present invention is not limited thereto.
Implementation mode one
As shown in fig. 1 to 3, a battery includes a plurality of battery cells 1, a plurality of tabs 2 are disposed on two sides of at least one battery cell 1, adjacent battery cells 1 are connected to each other according to the tabs 2 with the same polarity, and the battery cells 1 are sequentially connected in parallel to form a battery pack 3. Because the manufacturing process difficulty is increased along with the increase of the length, and the electrolyte is decomposed due to overhigh voltage when the battery cells are connected in series, the battery cells 1 with the lugs 2 at two sides are connected with each other according to the lugs 2 with the same polarity to form the battery cell group 3 in parallel, so that the capacity of the battery can be improved on the premise of maintaining unchanged voltage, and the situation that the electrolyte is decomposed due to overhigh voltage caused by the series connection of the battery cells 1 can be avoided; meanwhile, the plurality of battery cores 1 are only required to be connected in parallel in sequence, so that a partition plate for blocking electrolyte is omitted from being arranged between the battery cores 1, the production process is simplified, the production process difficulty of the battery is reduced, and the production cost of the battery is reduced; electric core 1 is provided with a plurality of utmost point ear 2, through increasing the quantity that utmost point ear 2 was drawn forth in electric core 1, reduces electric core 1 internal resistance, improves the ability of overflowing of battery, and wherein, utmost point ear 2 helps improving the steadiness between adjacent electric core 1 through welding or riveted mode fixed connection between adjacent electric core 1, reduces the probability that adjacent electric core 1 broke down.
In this embodiment, two tabs 2 are disposed on two sides of each battery cell 1, each tab 2 includes a positive tab 21 and a negative tab 22, the adjacent battery cells 1 are connected to the positive tab 21 through the positive tab 21, and the negative tabs 22 are connected to the negative tabs 22, so that the adjacent battery cells 1 are connected in parallel to form the battery pack 3, but the present invention is not limited thereto, the battery cells 1 include but are not limited to a winding structure or a lamination structure, the number of the battery cells 1 is 1-100, the number of the tabs 2 on each side is 1-100, and the adjustment can be performed according to the actual battery model and the overcurrent requirement.
The electrode lug 2 at one end of the electric core group 3 is provided with an insulation structure. Because the electric core 1 that is located 3 one ends of electric core group also is the structure that both sides go out utmost point ear 2, and in order to avoid the idle utmost point ear 2 of this electric core 1 to contact each other, or take place the contact with casing 5, lead to the condition of battery short circuit, consequently, set up insulating structure with the idle utmost point ear 2 of this electric core, again or with this utmost point ear 2 folding or excision, help reducing the probability that the idle utmost point ear 2 of electric core 1 takes place the short circuit, thereby improve the security performance of battery, but the utility model discloses not so limit, also can only set up utmost point ear 2 in one side of this electric core 1 when making this electric core 1, saved the later stage and folded or cut utmost point ear 2, help improving production efficiency, wherein, insulating structure includes but not limited to the joint paper, or toward utmost point ear 2 sheathes in insulating cover.
The tab 2 at one end of the electric core group 3 is assembled into a general electrode 4 through a top cover. Because the electric core 1 that is located the 3 other ends of electric core group also is the structure that both sides go out utmost point ear 2, consequently, the utmost point ear 2 that should hold the electric core group becomes total electrode 4 through the top cap equipment, wherein, the top cap includes but not limited to the top cap piece, insulating plastic and switching piece, utmost point ear 2 is connected to switching piece one end, total electrode 4 is connected to the other end of switching piece, and total electrode 4 is fixed in the top cap piece through insulating plastic, realize the electricity between total electrode 4 and the utmost point ear 2 and connect, and two total electrodes 4 are located same one side of battery, be favorable to reducing module or battery package and join in marriage the space, promote space utilization, but the utility model discloses do not use this as the limit, utmost point ear 2 at the 3 both ends of electric core group also can assemble into total electrode 4 through.
The two sides of the plurality of battery cells 1 are all provided with tabs 2, and the tab 2 on each side comprises a positive tab 21 and a negative tab 22. The both sides of a plurality of electricity core 1 all set up utmost point ear 2, are convenient for interconnect utmost point ear 2, parallelly connected formation electric core group 3, and the utmost point ear 2 of every side includes anodal ear 21 and negative pole ear 22, nevertheless the utility model discloses not so as limit, the utmost point ear 2 of every side can only have anodal ear 21 or negative pole ear 22, satisfy the battery just produce work can.
The number of the lugs 2 on one side of the battery cell 1 is equal to the number of the lugs 2 on the other side of the battery cell 1. The quantity of utmost point ear 2 of 1 one side of electric core equals the quantity of utmost point ear 2 of 1 opposite side of electric core, is convenient for unify the production standard and carry out mass production to electric core 1 to reduce electric core 1's manufacturing cost, nevertheless the utility model discloses not so limit, the also inequality of the utmost point ear 2 of 1 both sides of electric core satisfies with adjacent electric core 1's utmost point ear 2 correspond be connected can.
The adjacent tabs 2 have different polarities. In this embodiment, the tab 2 of each side is arranged according to the staggered order of positive and negative polarity, but the utility model discloses not so as to limit, the tab 2 of each side can be arranged according to positive, negative order, or arrange according to positive, negative, positive order, satisfy between the adjacent electric core 1 according to the tab 2 interconnect of the same polarity can.
The battery also comprises a shell 5, wherein openings are arranged on two sides of the shell 5, and the electric core group 3 is accommodated in the shell 5. Increase casing 5, play the effect of protection electric core group 3, and simultaneously, still play airtight electric core group 3 and electrolyte effect, avoid electrolyte to take place to leak, help improving the security of battery, wherein, casing 5 adopts integral type or split type structure, casing 5's whole length is more than or equal to the holistic length of electric core group 3, casing 5's both sides are provided with the opening, be convenient for place casing 5 with electric core group 3 in, then weld in the opening with the apron, a sealed housing 5, prevent that electrolyte from revealing.
The utility model discloses a theory of operation is:
because the manufacturing process difficulty is increased along with the increase of the length, and the electrolyte is decomposed due to overhigh voltage when the battery cells are connected in series, the battery cells 1 with the lugs 2 at two sides are connected with each other according to the lugs 2 with the same polarity to form the battery cell group 3 in parallel, so that the capacity of the battery can be improved on the premise of maintaining unchanged voltage, and the situation that the electrolyte is decomposed due to overhigh voltage caused by the series connection of the battery cells 1 can be avoided; meanwhile, the plurality of battery cores 1 are only required to be connected in parallel in sequence, so that a partition plate for blocking electrolyte is omitted from being arranged between the battery cores 1, the production process is simplified, the production process difficulty of the battery is reduced, and the production cost of the battery is reduced; electric core 1 is provided with a plurality of utmost point ear 2, through increasing the quantity that utmost point ear 2 was drawn forth in electric core 1, reduces electric core 1 internal resistance, improves the ability of overflowing of battery, and wherein, utmost point ear 2 helps improving the steadiness between adjacent electric core 1 through welding or riveted mode fixed connection between adjacent electric core 1, reduces the probability that adjacent electric core 1 broke down.
Second embodiment
As shown in fig. 4 to 5, the first embodiment is different from the first embodiment: one side of at least one electric core 1 of this embodiment is provided with a plurality of utmost point ears 2, and the unilateral of the electric core 1 that is located electric core group 3 one end sets up utmost point ear 2, and the quantity of the utmost point ear 2 of electric core 1 one side is greater than the quantity of the utmost point ear 2 of electric core 1 opposite side, and adjacent utmost point ear 2's polarity is the same. The tab 2 is arranged on one side of the battery cell 1 at one end of the battery cell group 3, so that the later folding or cutting of the tab 2 or the arrangement of an insulation structure is omitted, the production efficiency is improved, the probability of short circuit of the idle tab 2 in use is avoided, and the safety of the battery is improved; the number of the lugs 2 on one side of the battery cell 1 is greater than that of the lugs 2 on the other side of the battery cell 1, so that the lugs 2 of the adjacent battery cells 1 can be correspondingly connected, and the flexibility of the battery cells 1 is improved; the polarities of the adjacent tabs 2 can be the same, and the requirement of positive production work of the battery is met.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
As shown in fig. 6 to 7, the first embodiment is different from the first embodiment: in order to improve the stability between the tabs 2 of the adjacent electric cores 1, the tabs 2 on the adjacent electric cores 1 are fixedly connected through welding, riveting or magnetic connection, wherein the magnetic connection is that magnets are installed on the tabs 2 on the electric cores 1 so as to improve the stability between the tabs 2 of the adjacent electric cores 1, ensure that the relative positions of the tabs 2 of the adjacent electric cores 1 are not changed, reduce the probability of short circuit or short circuit between the electric cores 1, and the shell 5 is provided with at least one of a liquid injection hole, an explosion-proof valve and a turnover piece. In the embodiment, the tabs 2 at the two ends of the electric core group 3 are assembled into the total electrode 4 through the top cover, that is, the tab 2 at one end of the electric core group 3 forms the positive total electrode 4, and the tab 2 at the other end forms the negative total electrode 4; a plurality of liquid injection holes can be formed in different positions of the shell 5, so that electrolyte can be conveniently injected, the electrolyte is prevented from being distributed unevenly, the electric core group 3 is completely soaked in the electrolyte, and the performance of the battery is improved; the explosion-proof valve is added, and can automatically and quickly release the pressure of the battery when the battery rises due to overcharge, overdischarge, overcurrent and short circuit inside the battery, so that safety accidents caused by explosion of the battery are avoided; the top cover or the shell 5 is provided with the turnover sheet, when the internal pressure of the lithium battery exceeds a preset value, the turnover sheet can turn over, so that the anode and the cathode of the lithium battery are short-circuited, and the lithium battery stops working.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
A battery module comprises the battery of the first embodiment.
It should be noted that: the adjacent batteries are connected in series or in parallel through the total electrode 4 on the batteries.
Fifth embodiment
A battery module includes the battery of the second embodiment.
It should be noted that: the adjacent batteries are connected in series or in parallel through the total electrode 4 on the batteries.
Sixth embodiment
A battery module includes the battery of embodiment three.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A battery, characterized by: the battery comprises a plurality of battery cores (1), wherein a plurality of lugs (2) are arranged on two sides or one side of each battery core (1), the adjacent battery cores (1) are connected with each other according to the lugs (2) with the same polarity, and the battery cores (1) are sequentially connected in parallel to form a battery core group (3).
2. A battery as in claim 1, wherein: the electrode lug (2) at one end of the electric core group (3) is provided with an insulation structure.
3. A battery as in claim 1, wherein: the single side of the battery cell (1) positioned at one end of the battery cell group (3) is provided with the pole lug (2).
4. A battery as in claim 1, wherein: the electrode lugs (2) at one end of the electric core group (3) are assembled into a total electrode (4) through a top cover.
5. A battery as in claim 1, wherein: the battery cell comprises a plurality of battery cells (1), wherein the two sides of each battery cell are respectively provided with a tab (2), and each tab (2) comprises a positive tab (21) and a negative tab (22).
6. A battery as in claim 1, wherein: the number of the lugs (2) on one side of the battery cell (1) is greater than or equal to that of the lugs (2) on the other side of the battery cell (1).
7. A battery as in claim 1, wherein: the adjacent tabs (2) have different polarities.
8. A battery as in claim 1, wherein: the battery also comprises a shell (5), wherein openings are formed in two sides of the shell (5), and the electric core group (3) is accommodated in the shell (5).
9. A battery as in claim 1, wherein: the fixed connection mode between the lugs (2) of the adjacent battery cells (1) comprises welding, riveting or magnetic connection.
10. A battery module, its characterized in that: comprising a battery according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021393284.2U CN212695280U (en) | 2020-07-15 | 2020-07-15 | Battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021393284.2U CN212695280U (en) | 2020-07-15 | 2020-07-15 | Battery and battery module |
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| Publication Number | Publication Date |
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| CN212695280U true CN212695280U (en) | 2021-03-12 |
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| CN202021393284.2U Active CN212695280U (en) | 2020-07-15 | 2020-07-15 | Battery and battery module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022237805A1 (en) * | 2021-05-14 | 2022-11-17 | 陕西奥林波斯电力能源有限责任公司 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
| WO2023160229A1 (en) * | 2022-02-25 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery unit, battery, and electric device |
-
2020
- 2020-07-15 CN CN202021393284.2U patent/CN212695280U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022237805A1 (en) * | 2021-05-14 | 2022-11-17 | 陕西奥林波斯电力能源有限责任公司 | Roll core for large-capacity battery, parallel roll core group, and large-capacity battery |
| WO2023160229A1 (en) * | 2022-02-25 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery unit, battery, and electric device |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220315 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 211100 Lantian Road 249, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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