CN111933887B - Electrolyte injection device and method for energy storage power battery - Google Patents

Electrolyte injection device and method for energy storage power battery Download PDF

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Publication number
CN111933887B
CN111933887B CN202010866068.3A CN202010866068A CN111933887B CN 111933887 B CN111933887 B CN 111933887B CN 202010866068 A CN202010866068 A CN 202010866068A CN 111933887 B CN111933887 B CN 111933887B
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injection
electrolyte
sleeve
control valve
frame
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CN111933887A (en
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钟旭航
张旻澍
李晓丹
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Dongfang Xingshi Energy Storage Battery Co ltd
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Dongfang Xingshi Energy Storage Battery Co ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses an electrolyte injection device of an energy storage power battery and an injection method thereof, and the electrolyte injection device comprises an injection frame, one end of the injection frame is arranged at one side of a control valve, the other end of the injection frame is connected with the inside of the battery, the injection frame comprises a middle through pipe, one end of the middle through pipe is connected with the control valve, the other end of the middle through pipe is connected with two sides of a double-cylinder frame, when the electrolyte is injected, an injection head and the liquid level of the injected electrolyte are always kept at 3-5CM, the height can be increased along with the increase of the injected electrolyte, namely along with the increase of the liquid level, the water flow and the liquid level of the injection head are always kept in a wave-free state in the injection process of the electrolyte, the whole injection process becomes more gentle, no bubbles or splashing phenomenon occurs in the period, the injection amount of the electrolyte is easier to calculate, air is not easy to generate, no external interference exists, and the injection head and the injection pipe after injection are cleaner, the electrolyte is not dragged out by the water, and the cleanness and the safety of the external environment are kept.

Description

Electrolyte injection device and method for energy storage power battery
Technical Field
The invention relates to battery electrolyte injection equipment, in particular to an energy storage power battery electrolyte injection device and an electrolyte injection method thereof.
Background
The electrolyte is a medium used by batteries, electrolytic capacitors and the like, has certain corrosivity, provides ions for normal work of the batteries, ensures that chemical reactions generated in the work are reversible, is injected into the batteries after the production of the batteries is finished, can select different formulas according to requirements, is mainly prepared from special sulfuric acid and distilled water according to a certain proportion, and is injected into the batteries through accurate injection equipment.
Based on the above description, the inventor finds that the existing electrolyte injection device for the energy storage power battery and the electrolyte injection method thereof mainly have the following defects, for example:
1. in the prior art, only the interior of the injection cylinder is subjected to vacuum treatment, but redundant air is remained in an injection pipeline and a battery shell, and the interior of the battery is subjected to injection, so that bubbles are easily generated during injection or the reaction and use of electrolyte are influenced.
2. When the electrolyte is injected into the battery, the height difference between the injection head and the liquid level is difficult to control, if the height is higher, bubbles are easy to generate, the phenomenon of splashing is easy to occur, and the electrolyte can be taken out of the battery by the spray head and the pipeline which are stained with the electrolyte to cause pollution and corrosion.
Disclosure of Invention
In order to solve the technical problems, the invention provides an electrolyte filling device and an electrolyte filling method for an energy storage power battery, which aim to solve the existing problems.
In order to achieve the purpose, the invention is realized by the following technical scheme: an electrolyte injection device of an energy storage power battery comprises a liquid containing tank and a transmission pipeline connected to one end of the liquid containing tank, wherein one end of the transmission pipeline is connected with one side of a control valve;
one end of the vacuum pump is connected with one end of the control valve, and the other end of the vacuum pump is communicated with the air;
one end of the injection frame is arranged on one side of the control valve, and the other end of the injection frame is connected with the interior of the battery;
the transmission frame is arranged at one end of the control cabinet at the bottom of the control valve and is a rough surface transmission belt;
the injection frame comprises a middle through pipe, one end of the middle through pipe is connected with the control valve, the other end of the middle through pipe is connected with two sides of the double-barrel frame, and an injection sleeve is wound on the outer circumferential surface of the double-barrel frame.
According to one possible embodiment, the rotational centripetal force of the double cartridge holder is greater than the flow force of the liquid in the infusion cannula.
According to an implementation mode, the middle section of the injection sleeve is connected with a sleeve, an inner flow passage is connected inside the sleeve, and one end of the sleeve is connected with a sucker.
According to one embodiment, a valve is disposed between the sleeve and the internal flow passage, the valve having a unidirectional characteristic.
According to an embodiment, the other end of the injection cannula is connected with a plurality of floating pieces, one side of each floating piece is connected with a shrinking frame, the shrinking frame can move along the direction opposite to the flow direction of the liquid under pressure, and a detector is arranged inside the shrinking frame.
According to an implementation mode, after being contracted, the contraction frame is as long as the bottommost part of the injection sleeve, the bottommost part of the injection sleeve is in a horn shape, and the distance between the bottommost part of the injection sleeve and the liquid level of the electrolyte is kept at 3-5CM all the time.
The invention also provides an electrolyte injection method of the energy storage power battery, which comprises the following steps:
s10: inserting the transmission pipeline into the battery, buckling the sleeve on the pole cap, and simultaneously opening the control valve to enable the input end and the output end to be in a mutually communicated state;
s20: starting a vacuum pump to vacuumize the liquid containing tank, the transmission pipeline, the injection frame and the battery shell through passages at two ends of the control valve, so that the whole injection line is in a vacuum state;
s30: heating the electrolyte in the liquid containing tank to 40-50 ℃, so that the fluidity of the electrolyte is enhanced, and the control valve can easily transmit and inject the electrolyte;
s40: and the electrolyte with higher fluidity flows into the middle through pipe and the injection sleeve through the control valve, and is injected into the battery until the height reaches 10-15mm of the polar plate.
The electrolyte injection device and the electrolyte injection method for the energy storage power battery have the advantages of reasonable design, strong functionality and the following beneficial effects:
1. according to the invention, the gas circuit between the battery and the outside is sealed by the sleeve, the injection sleeve is inserted into the battery, and the air in the battery and the air in the liquid containing groove are simultaneously pumped out by the vacuum pump, so that the whole equipment is in a vacuum state, the electrolyte can not be mixed with air during injection, the electrolyte in the battery is not easy to generate bubbles, and the electrolyte does not contain air and is less influenced during chemical reaction.
2. When the electrolyte is injected, the liquid level of the injection head and the liquid level of the injected electrolyte are always kept at 3-5CM, the height can be increased along with the increase of the injected electrolyte, namely, the height is increased along with the rise of the liquid level, the water flow and the liquid level of the injection head are always kept in a wave-free state in the injection process of the electrolyte, the whole injection process is more gentle, no bubble and splashing phenomenon occurs in the process, the injection amount of the electrolyte is easier to calculate, air is not easy to generate, no external condition interference exists, the injection head and the injection pipe after injection are cleaner, the electrolyte is not dragged out by mud and water, and the cleanness and the safety of the external environment are kept.
Drawings
Other features, objects and advantages of the present invention will become more apparent from the following detailed description of the embodiments of the invention when taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of an electrolyte injection device for an energy storage power battery according to the present invention.
Fig. 2 is a schematic view of the extended structure of the injection cannula of the present invention.
Fig. 3 is a schematic structural view of the upper half part of the injection rack of the invention.
Fig. 4 is a schematic structural view of the middle section of the injection rack of the present invention.
Fig. 5 is a schematic structural view of the lower half of the injection rack of the present invention.
Fig. 6 is a structural schematic diagram of the lower half part of the injection rack after the shrinkage rack retracts.
Description of reference numerals: liquid containing tank-0, transmission pipeline-1, vacuum pump-2, control valve-3, injection frame-4, transmission frame-5, middle through pipe-40, double-barrel frame-41, injection sleeve-42, sleeve-50, suction cup-51, inner flow channel-52, floating sheet-60, contraction frame-61 and detector-62.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and operate, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and it is possible for one of ordinary skill in the art to understand the specific meaning of the above terms according to the specific situation.
The examples are as follows:
as shown in the attached drawings 1 to 3, the invention provides an electrolyte injection device for an energy storage power battery, which comprises a liquid containing tank 0 and a transmission pipeline 1 connected to one end of the liquid containing tank, wherein one end of the transmission pipeline 1 is connected with one side of a control valve 3;
the vacuum pump 2, its one end links together with one end of the control valve 3, another end communicates with air, the control valve 3 has three kinds of switching modes, the first is the closed mode, totally close input end and output end, the apparatus is the closed condition at this moment, the second is the vacuum mode, the vacuum pump 2 can be in connection with input end and output end when the control valve 3 opens, carry on the vacuumization to input end and output end, the third is the liquid injection mode, the input end is in direct connection with output end at this moment, the electrolyte is exported to the battery case under the influence of booster pump, the connecting path of the vacuum pump 2 and control valve 3 is closed at this moment;
one end of the injection frame 4 is arranged at one side of the control valve 3, and the other end of the injection frame is connected with the interior of the battery;
the transmission frame 5 is arranged at one end of a control cabinet at the bottom of the control valve 3 and is a rough surface transmission belt which can transmit the battery in and out, and the rough surface is less prone to slipping;
the injection frame 4 comprises a middle through pipe 40, one end of the middle through pipe 40 is connected with the control valve 3, the other end of the middle through pipe is connected with two sides of a double-barrel frame 41, an injection sleeve 42 is wound on the outer circumferential surface of the double-barrel frame 41, the double-barrel frame 41 is divided into two output pipelines, the double-position design can meet the condition that the output at one position is slow, the output pressure of the booster pump is controlled, and the electrolyte impact force caused by too large one-time entering pressure is prevented from being too large; the middle through pipe 40 is internally connected with a guide groove in the double-barrel frame 41 and is communicated with the injection sleeve 42 through the guide groove, and the injection sleeve 42 has certain toughness and cannot press the normal flow of the electrolyte when being bent and wound.
As shown in fig. 3, the rotational centripetal force of the dual-barrel holder 41 is greater than the flow force of the liquid in the injection cannula 42, and the rewinding force of the dual-barrel holder 41 is greater than the flow force of the liquid so that the lifting effect of the injection cannula 42 can be ensured when the liquid level rises, and the lifting distance of the injection cannula 42 is synchronized with the distance of the liquid level increase.
As shown in fig. 4, a sleeve 50 is connected to the middle section of the injection sleeve 42, an inner flow channel 52 is connected to the inside of the sleeve 50, a suction cup 51 is connected to one end of the sleeve 50, the suction cup 51 is of a circular ring structure with a large contact surface and is divided into an inner layer and an outer layer, a battery with a large distance between the pole caps can be simultaneously fixed to the inner layer and the outer layer, air tightness and vacuum degree during injection are enhanced, when the distance between the pole caps is small, only a fixed outer ring can be selected, the injection sleeve is adaptable to batteries with different volumes, the suction cup can be more tightly adsorbed after pressure is pumped by the vacuum pump 2, and isolation is better.
As shown in fig. 4, a valve is arranged between the sleeve 50 and the inner flow passage 52, the valve has a unidirectional characteristic, and the valve can pump air out of the suction cup 51 during vacuum pumping, and electrolyte does not flow into the suction cup during electrolyte injection, so that the sealing performance of the suction cup 51 is improved, and the normal injection process is not affected.
As shown in fig. 5 to 6, the other end of the injection sleeve 42 is connected to a plurality of floating plates 60, one side of each floating plate 60 is connected to a shrinking frame 61, the shrinking frame is pressed to move in a direction opposite to the flow direction of the liquid, a detector 62 is arranged inside the shrinking frame 61, the floating plates 60 do not react with sulfuric acid and hydrofluoric acid, the equipment cannot be corroded to fall into the battery even if an accident occurs, the floating plates can clamp the sleeve 50 to prevent the sleeve from falling out, the detector 62 can detect the distance between the liquid level and feed the distance back to the control cabinet, so that a worker can track the distance in time, which is a relatively common detection technology and will not be described in detail herein, when the shrinking frame 61 is pressed, the shrinking frame touches the bottom, automatically shrinks under the influence of external pressure, and after shrinking, the injection sleeve 42 and the bottom inside the battery are kept at 3-5cm, the bottom of the interior of the battery is not directly touched, and the condition that the injection head is wetted when the injection is just started is prevented.
As shown in fig. 5 to 6, after the shrinkage frame 61 is shrunk, the length of the shrinkage frame is equal to the length of the bottommost portion of the injection sleeve 42, the bottommost portion of the injection sleeve 42 is in a horn shape, the distance between the bottommost portion of the injection sleeve 42 and the liquid level of the electrolyte is kept at 3-5CM all the time, the horn shape is easier to discharge hanging drops compared with a rectangular shape, the number of the hanging drops dropping outside is reduced, the distance between the injection sleeve 42 and the liquid level is 3CM, the shortest distance prevents the two from touching, and the longest distance is 5CM, so that the situation that the electrolyte injected from the two too long distance splashes is prevented.
The electrolyte injection method of the energy storage power battery comprises the following steps:
s10: inserting the transmission pipeline 1 into the battery, buckling the sleeve 50 on the pole cap, and simultaneously opening the control valve 3 to enable the input end and the output end to be in a mutually communicated state;
s20: starting the vacuum pump 2 to vacuumize the liquid containing tank 0, the transmission pipeline 1, the injection frame 4 and the battery shell through passages at two ends of the control valve 3, so that the whole injection line is in a vacuum state;
s30: the electrolyte in the liquid containing tank 0 is heated to 40-50 ℃, the fluidity of the electrolyte is enhanced, the control valve 3 is easier to transmit and inject the electrolyte, the electrolyte can be heated to a better flowing state just at the temperature of 40-50 ℃, the self components of the electrolyte can not be influenced, the internal water ratio can not be influenced, and the injection speed of the electrolyte is improved;
s40: the electrolyte with higher fluidity flows into the middle through pipe 40 and the injection sleeve 42 through the control valve 3, and is injected into the battery until the height reaches 10-15cm of the pole plate, and then the electrolyte stops.
The specific working principle of the invention is as follows:
the battery shell needing to be injected with electrolyte is transmitted to the side of a control cabinet through a transmission frame 5, connecting sleeves of two injection sleeves 42 are disassembled, the injection sleeves 42 enter the interior of the battery shell and extend into the bottom until a floating sheet 60 touches the bottom of the shell, at the moment, the extending process is stopped, a sleeve 50 is sleeved on a polar cap, a sucker 51 is tightly fixed on the surface of the battery shell, in the process, a contraction frame 61 can drive the floating sheet 60 to contract to the length equal to that of the injection sleeves 42, the distance between the injection sleeves 42 and the bottom of the interior of the battery shell is kept, after two sides are fixed, a control valve 3 is adjusted to be switched to a vacuum mode, a vacuum pump 2 is used for vacuumizing the liquid containing tank 0, the transmission pipeline 1, the control valve 3, the injection frame 4 and the interior of the battery, and the interior of the pipeline needing to be injected is subjected to vacuum treatment, removing air influence factors, heating the electrolyte in the liquid containing tank 0, heating to 40-50 ℃, starting the liquid injection mode of the control valve 3, pumping out the electrolyte in the liquid containing tank 0, leading the electrolyte into the control valve 3 along the transmission pipeline 1, leading the electrolyte into the middle through pipe 40, leading the electrolyte in the middle through pipe 40 to wind into a pipeline in the double-barrel frame 41, leading the electrolyte into the injection sleeve 42, leading the injection sleeve 42 to continuously lead the electrolyte into the battery shell, leading the double-barrel frame 41 to rotate anticlockwise in the leading-in process, slowly withdrawing the injection sleeve 42, continuously lifting the height of the injection sleeve 42 when the liquid level in the battery shell rises, leading the injection sleeve 42 and the injection sleeve to be in a synchronous state, leading the injection sleeve 42 not to be in contact with the liquid all the time, taking out the injection sleeve 42 through a pole cap opening after standing for fifteen seconds and waiting for hanging drops to drip after injection, and leading the injection sleeve 42 to be in a dry state, the phenomenon that electrolyte liquid flows out and is sputtered after being taken out is avoided, the environment is protected, the safety is improved, and no bubbles are generated in the injection process.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (5)

1. An energy storage power battery electrolyte injection device, includes:
the liquid containing tank (0) further comprises a transmission pipeline (1) connected to one end of the liquid containing tank, and one end of the transmission pipeline (1) is connected with one side of the control valve (3);
one end of the vacuum pump (2) is connected with one end of the control valve (3), and the other end is communicated with the air; the method is characterized in that:
one end of the injection frame (4) is arranged on one side of the control valve (3), and the other end of the injection frame is connected with the inside of the battery;
the transmission frame (5) is arranged at one end of a control cabinet at the bottom of the control valve (3) and is a rough surface transmission belt;
the injection rack (4) comprises a middle through pipe (40), one end of the middle through pipe (40) is connected with the control valve (3), the other end of the middle through pipe is connected with two sides of the double-barrel rack (41), and an injection sleeve (42) is wound on the outer circumferential surface of the double-barrel rack (41);
the rotational centripetal force of the double-barrel rack (41) is larger than the flow force of the liquid in the injection sleeve (42);
the other end of the injection sleeve (42) is connected with a plurality of floating pieces (60), one side of each floating piece (60) is connected with a contraction frame (61) which can move along the direction opposite to the flow direction of liquid when being pressed, and a detector (62) is arranged inside each contraction frame (61).
2. The electrolyte injection device for the energy storage power battery according to claim 1, characterized in that: the middle section of injection sleeve (42) is connected with sleeve (50), the internal connection of sleeve (50) has interior runner (52), the one end of sleeve (50) is connected with sucking disc (51).
3. The electrolyte injection device for the energy storage power battery according to claim 2, characterized in that: a valve is arranged between the sleeve (50) and the inner runner (52), and the valve has unidirectionality.
4. The electrolyte injection device for the energy storage power battery according to claim 1, characterized in that: the length of the contraction frame (61) is equal to that of the bottommost part of the injection sleeve (42) after contraction, the bottommost part of the injection sleeve (42) is in a horn shape, and the distance between the contraction frame and the liquid level of the electrolyte is kept at 3-5cm all the time.
5. The method for filling the energy storage power battery with the electrolyte according to any one of claims 1 to 4, characterized by comprising the following steps:
s10: inserting the transmission pipeline (1) into the battery, buckling the sleeve (50) on the pole cap, and simultaneously opening the control valve (3) to enable the input end and the output end to be in a mutually communicated state;
s20: starting a vacuum pump (2) to vacuumize the liquid containing tank (0), the transmission pipeline (1), the injection frame (4) and the battery shell through passages at two ends of a control valve (3), so that the whole injection line is in a vacuum state;
s30: the electrolyte in the liquid containing tank (0) is heated to 40-50 ℃, the fluidity of the electrolyte is enhanced, and the control valve (3) is easier to transmit and inject the electrolyte;
s40: the electrolyte with higher fluidity flows into the middle through pipe (40) and the injection sleeve (42) through the control valve (3), and is injected into the battery until the height reaches 10-15mm of the pole plate.
CN202010866068.3A 2020-08-25 2020-08-25 Electrolyte injection device and method for energy storage power battery Active CN111933887B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05325944A (en) * 1992-05-14 1993-12-10 Toshiba Battery Co Ltd Electrolyte injection device for battery
CN1395329A (en) * 2001-06-28 2003-02-05 株式会社汤浅 Liquid filling device for battery case chemical conversion and battery case chemical conversion method
JP2004327161A (en) * 2003-04-23 2004-11-18 Matsushita Electric Ind Co Ltd Electrolyte injection method and device of sealed battery
CN2752970Y (en) * 2004-12-03 2006-01-18 中国电子科技集团公司第十八研究所 Large capacity lithium ion battery liquid filling device
JP2008059973A (en) * 2006-09-01 2008-03-13 Matsushita Electric Ind Co Ltd Electrolyte pouring method and electrolyte pouring device of lithium secondary battery
CN201562708U (en) * 2009-10-30 2010-08-25 东莞市鸿宝锂电科技有限公司 Device for filling lithium battery with electrolyte in vacuuming manner
CN202758966U (en) * 2012-06-21 2013-02-27 深圳市东方华联科技有限公司 Electrolyte injection device for injecting electrolyte to battery
CN203631682U (en) * 2013-12-04 2014-06-04 宁德时代新能源科技有限公司 Liquid filling forming integrated clamp of lithium-ion power battery
CN210668586U (en) * 2019-10-12 2020-06-02 东莞市超业精密设备有限公司 Infiltration equipment for producing battery

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05325944A (en) * 1992-05-14 1993-12-10 Toshiba Battery Co Ltd Electrolyte injection device for battery
CN1395329A (en) * 2001-06-28 2003-02-05 株式会社汤浅 Liquid filling device for battery case chemical conversion and battery case chemical conversion method
JP2004327161A (en) * 2003-04-23 2004-11-18 Matsushita Electric Ind Co Ltd Electrolyte injection method and device of sealed battery
CN2752970Y (en) * 2004-12-03 2006-01-18 中国电子科技集团公司第十八研究所 Large capacity lithium ion battery liquid filling device
JP2008059973A (en) * 2006-09-01 2008-03-13 Matsushita Electric Ind Co Ltd Electrolyte pouring method and electrolyte pouring device of lithium secondary battery
CN201562708U (en) * 2009-10-30 2010-08-25 东莞市鸿宝锂电科技有限公司 Device for filling lithium battery with electrolyte in vacuuming manner
CN202758966U (en) * 2012-06-21 2013-02-27 深圳市东方华联科技有限公司 Electrolyte injection device for injecting electrolyte to battery
CN203631682U (en) * 2013-12-04 2014-06-04 宁德时代新能源科技有限公司 Liquid filling forming integrated clamp of lithium-ion power battery
CN210668586U (en) * 2019-10-12 2020-06-02 东莞市超业精密设备有限公司 Infiltration equipment for producing battery

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