CN210923813U - Voltage detection device and voltage detection system - Google Patents
Voltage detection device and voltage detection system Download PDFInfo
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- CN210923813U CN210923813U CN201921446328.0U CN201921446328U CN210923813U CN 210923813 U CN210923813 U CN 210923813U CN 201921446328 U CN201921446328 U CN 201921446328U CN 210923813 U CN210923813 U CN 210923813U
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Abstract
The embodiment of the utility model discloses voltage detection device and voltage detection system, include: the transformer is used for acquiring a first voltage signal of external equipment and converting the first voltage signal into a second voltage signal and comprises an insulating connecting piece, the insulating connecting piece comprises a connecting part and a stud, the connecting part of the insulating connecting piece is arranged in the transformer, and the stud of the insulating connecting piece is exposed outside; the detection circuit board is provided with at least one threaded hole, the number of the threaded holes is the same as that of the insulation connecting pieces, and the threaded holes are arranged in a one-to-one correspondence manner; the number of the insulating nuts is the same as that of the threaded holes; and a stud of the transformer penetrates through the threaded hole to be in threaded connection with the insulating nut and is fixed on the detection circuit board, and the detection circuit board is provided with a processing unit which is electrically connected with an output pin of the transformer and receives a second voltage signal. According to the technical scheme in the embodiment, the service life of the voltage detection device is prolonged, and detection of the voltage signal of the external equipment is facilitated.
Description
Technical Field
The embodiment of the utility model provides a relate to and detect technical field, especially relate to a voltage detection device and voltage detection system.
Background
The wind power generation is the most large-scale and commercial renewable energy technology at present, and a transformer connected to a detection circuit board is electrically connected with a wind power frequency converter to acquire a voltage signal of the wind power generation.
At present, the voltage signal of wind power generation cannot be well collected when a detection circuit board frequently breaks down.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a voltage detection device and voltage detection system to solve the technical problem that detection circuit board frequently breaks down and can not be fine to wind power generation's voltage signal gathers among the prior art.
In a first aspect, an embodiment of the present invention provides a voltage detection apparatus, including:
the transformer is used for acquiring a first voltage signal of external equipment and converting the first voltage signal into a second voltage signal, and comprises an insulating connecting piece, wherein the insulating connecting piece comprises a connecting part and a stud;
the detection circuit board is provided with at least one threaded hole, the number of the threaded holes is the same as that of the insulation connecting pieces, and the threaded holes are arranged in a one-to-one correspondence manner;
the number of the insulating nuts is the same as that of the threaded holes;
and the stud of the transformer penetrates through the threaded hole to be in threaded connection with the insulating nut and is fixed on the detection circuit board, and the detection circuit board is provided with a processing unit which is electrically connected with an output pin of the transformer and receives the second voltage signal.
Optionally, the transformer includes a housing, a sealing layer, and a voltage conversion element, the sealing layer is filled between the housing and the voltage conversion element, the connection portion is disposed in the sealing layer, the stud extends out of the sealing layer, and the voltage conversion element is configured to convert the first voltage signal into the second voltage signal.
Optionally, the insulating connecting piece includes a nylon screw, a screw cap of the nylon screw is used as the connecting portion and is arranged in the sealing layer, and a screw rod of the nylon screw extends out of the sealing layer.
Optionally, the insulating nut comprises a nylon nut.
Optionally, the detection circuit board further comprises an insulation damping unit sleeved on the stud and located between the detection circuit board and the transformer.
Optionally, the insulation damping unit includes a reed nut and an insulation sleeve, the insulation sleeve wraps the reed nut, and the reed nut is sleeved on the stud.
Optionally, the insulation sleeve comprises a polyolefin insulation sleeve.
Optionally, the transformer comprises a silicon rubber bonding layer arranged between the stud of the transformer and the insulating nut.
Optionally, the sealing layer comprises an epoxy glue sealing layer.
In a second aspect, an embodiment of the present invention provides a voltage detection system, including: the voltage detection device according to any of the above embodiments;
the output end of the wind power frequency converter is electrically connected with a transformer included by the voltage detection device;
and the output end of the wind driven generator is electrically connected with the input end of the wind power frequency converter.
The embodiment of the utility model provides an in technical scheme, the transformer includes insulating connecting piece, insulating connecting piece includes connecting portion and double-screw bolt, insulating connecting piece's connecting portion set up in the transformer, insulating connecting piece's double-screw bolt exposes outside, compare among the prior art insulating connecting piece in the transformer mode that passes through threaded connection, insulating connecting piece's connecting portion set up in the transformer, need not to punch and the tapping in the transformer, insulating connecting piece is a body structure with the transformer, screw hole and insulating nut threaded connection are passed to the double-screw bolt when transformer 1, fix on detection circuitry board, the mechanical strength of double-screw bolt has been increased, the life of insulating connecting piece and transformer has been increased, in order to solve among the prior art detection circuitry board frequently break down and can not be fine carry out the technical problem of gathering to wind power.
Drawings
Fig. 1 is a schematic structural diagram of a voltage detection apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another voltage detection apparatus according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of another voltage detection apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another voltage detection apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a voltage detection system according to a second embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a voltage detection device according to an embodiment of the present invention, and referring to fig. 1, the voltage detection device 100 includes: the transformer 1 is used for collecting a first voltage signal of external equipment and converting the first voltage signal into a second voltage signal, the transformer 1 comprises an insulating connecting piece 10, the insulating connecting piece 10 comprises a connecting part 11 and a stud 12, the connecting part 11 of the insulating connecting piece 10 is arranged in the transformer 1, and the stud 12 of the insulating connecting piece 10 is exposed outside; the detection circuit board 2 is provided with at least one threaded hole 20, the number of the threaded holes 20 is the same as that of the insulation connecting pieces 10, and the threaded holes 20 are arranged in a one-to-one correspondence manner; at least one insulating nut 3, the number of the insulating nuts 3 is the same as that of the threaded holes 20; referring to fig. 2, the stud 12 of the transformer 1 penetrates through the threaded hole 20 to be in threaded connection with the insulating nut 3, and is fixed on the detection circuit board 2, and a processing unit (not shown) is arranged on the detection circuit board 2, and is electrically connected with an output pin of the transformer 1 to receive a second voltage signal.
For example, fig. 1 only shows 4 transformers, but the number of transformers is not limited in the present embodiment.
In this embodiment, the transformer 1 is configured to collect a first voltage signal of an external device, convert the first voltage signal into a second voltage signal, and electrically connect a processing unit disposed on the detection circuit board 2 to an output pin of the transformer 1 to receive the second voltage signal. The transformer 1 is fixed on the detection circuit board 2.
In the prior art, the insulating connector 10 and the transformer 1 are fixed together by screwing. Specifically, the transformer 1 is generally perforated and then tapped, and the connecting portion 11 of the insulating connecting member 10 is fixed to the transformer 1 by a screw connection, and the connecting portion 11 of the insulating connecting member 10 may be threaded.
The technical scheme in the prior art has the defects that: on the first hand, the transformer 1 is punched, the size of the hole is difficult to control, on the second hand, when the stud 12 of the transformer 1 passes through the threaded hole 20 to be in threaded connection with the insulating nut 3 and fixed on the detection circuit board 2, the torsion force on the stud 12 is too large, and the stud is easy to slip or twist off.
In the embodiment of the utility model, the transformer 1 comprises the insulating connecting piece 10, the insulating connecting piece 10 comprises the connecting part 11 and the stud 12, the connecting part 11 of the insulating connecting piece 10 is arranged in the transformer 1, the stud 12 of the insulating connecting piece 10 is exposed outside, compared with the prior art that the insulating connecting piece 10 is connected with the transformer 1 through the thread, the connecting part 11 of the insulating connecting piece 10 is arranged in the transformer 1, without punching and tapping in the transformer 1, the insulating connecting piece 10 and the transformer 1 are of an integral structure, when the stud 12 of the transformer 1 passes through the threaded hole 20 to be in threaded connection with the insulating nut 3 and is fixed on the detection circuit board 2, the mechanical strength of the stud 12 is increased, the service life of the insulating connecting piece 10 and the transformer 1 is prolonged, the technical problem that a detection circuit board frequently breaks down and cannot well acquire voltage signals of wind power generation in the prior art is solved.
Optionally, on the basis of the above technical solution, the transformer 1 includes a housing, a sealing layer and a voltage conversion element, the sealing layer is filled between the housing and the voltage conversion element, the connection portion is disposed in the sealing layer, the stud extends out of the sealing layer, and the voltage conversion element is configured to convert the first voltage signal into the second voltage signal. In this embodiment, the sealing layer is typically a sealant, which is encapsulated between the housing and the voltage converting element in a liquid state and forms the sealing layer after it has cured. When the transformer operates, the voltage conversion element can generate certain heat, the heat conductivity of the sealant is good, and a good heat dissipation effect can be achieved. The voltage conversion element is exemplified by a voltage transformer.
The connecting part 11 of the insulating connecting piece 10 is arranged in the transformer 1, and the stud 12 of the insulating connecting piece 10 is exposed outside, because the connecting part 11 of the insulating connecting piece 10 is embedded in the sealant before curing, and after curing, the connecting part 11 of the insulating connecting piece 10 can be arranged in the transformer 1 to be integrated with the transformer. In this embodiment, the sealing layer has a good insulating property and does not generate eddy current under the influence of current or other electrical signals.
Optionally, on the basis of the above technical scheme, the insulating connecting member 10 includes a nylon screw, a nut of the nylon screw is arranged in the sealing layer as the connecting portion 11, and a screw rod of the nylon screw extends out of the sealing layer. The nut of nylon screw is as connecting portion 11, sets up in the sealing layer, and the process that the screw rod of nylon screw extends the sealing layer is as follows: when the sealing layer is in a liquid state, the sealing layer is encapsulated between the shell and the voltage conversion element, the screw cap of the nylon screw is embedded in the liquid sealing layer, after solidification, the screw cap of the nylon screw is arranged in the sealing layer, and the screw rod of the nylon screw extends out of the sealing layer to form an integral structure with the transformer 1.
The nylon screw is good in insulating property, non-conductive and free of eddy current under the influence of current or other electric signals. The nylon screw has high mechanical strength, good toughness, high tensile strength, high compressive strength, high specific compressive strength, high impact strength, high stress and high vibration absorbing capacity, and the impact strength is higher than that of common plastic. Therefore, when the vibration sense of the wind power frequency converter is strong, the influence on the transformer 1 with the nylon screw arranged inside is not great.
Optionally, on the basis of the above technical scheme, the insulating nut includes a nylon nut. The nylon nut has good insulating property and is non-conductive, eddy current cannot be generated under the influence of current or other electric signals, and the stud 12 of the transformer 1 penetrates through the threaded hole 20 to be in threaded connection with the insulating nut 3, so that the transformer 1 is fixed on the detection circuit board 2.
Optionally, on the basis of the above technical solution, referring to fig. 3 and 4, the voltage detection apparatus further includes an insulating and damping unit 4, which is sleeved on the stud 12 and located between the detection circuit board 2 and the transformer 1. The insulation damping unit 4 has good insulation performance and cannot generate eddy current under the influence of current or other electric signals; the insulating damping unit 4 is sleeved on the stud 12 and located between the detection circuit board 2 and the transformer 1, has a damping function, can alleviate the influence of vibration of the wind power frequency converter on the whole of the transformer and the detection circuit board under the condition that the whole stress of the transformer and the detection circuit board is unbalanced, and prevents the transformer and the detection circuit board from shaking to cause the looseness of the whole structure.
Optionally, on the basis of the above technical scheme, the insulating and damping unit 4 includes a reed nut and an insulating sleeve, the insulating sleeve wraps the reed nut, and the reed nut is sleeved on the stud. When the transformer is installed on the detection circuit board, the insulating damping unit 4 formed by the reed nut and the insulating sleeve can reduce the vibration of the transformer 1, and can alleviate the influence of the vibration of the whole transformer and the detection circuit board from the wind power frequency converter under the condition that the whole stress of the transformer and the detection circuit board is unbalanced, so as to prevent the whole structure from loosening caused by the shaking of the transformer and the detection circuit board; on the other hand, the insulating sleeve wraps the reed nut, so that the insulating sleeve has good insulating property, and can avoid the generation of eddy current under the influence of current or other electric signals; on the other hand, the insulation damping unit 4 formed by the reed nut and the insulation sleeve ensures that the transformer 1 is not in direct contact with the detection circuit board 2 to affect the performance of the detection circuit board 2, meanwhile, the connection stability with the transformer 1 can be realized, and the service life of the voltage detection device is prolonged.
Optionally, on the basis of the above technical solution, the insulating sleeve includes a polyolefin insulating sleeve.
An ethylene-vinyl acetate copolymer (EVA) rubber-plastic product is a novel environment-friendly plastic foaming material, has the advantages of good buffering, shock resistance, heat insulation, moisture resistance, chemical corrosion resistance and the like, and is non-toxic and non-absorbent. The outer layer of the insulating sleeve is made of a high-quality soft cross-linked polyolefin material and is compounded and processed with an inner layer material hot melt adhesive, the outer layer material has the characteristics of insulation, corrosion resistance, wear resistance and the like, and the inner layer material has the characteristics of low melting point, water resistance, sealing, high adhesion and the like. Therefore, the polyolefin insulating sleeve can play the roles of water resistance and heat resistance.
Optionally, on the basis of the above technical solution, a silicon rubber bonding layer is included and is arranged between the stud 12 and the insulating nut 3 of the transformer 1. The silicon rubber has outstanding high and low temperature resistance and aging resistance, excellent electrical insulation, moisture resistance and shock resistance, and excellent adhesion, can be widely used for bonding various metals, non-metals, plastics and rubber, and can be used for a long time within the range of-50 ℃ to +250 ℃.
The nylon screw paints the silicon rubber tie coat when the fastening, with 3 threaded connection of insulating nut, fixes transformer 1 and can increase the fastening force of nylon screw on detection circuit board 2, guarantees that the nylon screw can not squint or fall out because of wind-powered electricity generation converter vibrations.
Optionally, on the basis of the above technical scheme, the sealing layer includes a heat-conducting epoxy adhesive sealing layer. Compared with epoxy resin adhesive, the heat-conducting epoxy adhesive has better heat conductivity. The film thermal conductivity of the heat-conducting adhesive is 11.4W/(m.K); the viscosity is 139.0mPa · S, and the adhesive has the characteristics of low viscosity and high thermal conductivity, and is used for bonding and packaging electronic and electrical components, and in the embodiment, is filled between the housing and the voltage conversion element.
According to the technical scheme of the utility model, the nylon screw arranged in the transformer 1 passes through the insulation damping unit 4 and the threaded hole 20 to be connected with the nylon nut through threads, and is fixed on the detection circuit board 2, so that the structure is simple and practical, the installation is convenient, an additional fixing device is not needed, the influence of external equipment on the transformer 1 in vibration is reduced to the maximum extent, and the detection accuracy of the detection circuit is ensured; the transformer 1 uses the heat-conducting epoxy adhesive as a sealing layer to ensure that heat cannot be concentrated inside the transformer to influence the service life of the transformer when the transformer works; meanwhile, the nylon screw is coated with a silicon rubber bonding layer to increase the fastening force of the nylon screw when being fastened, the nylon screw is guaranteed not to be deviated or fall out due to vibration of the frequency converter, the insulating damping unit comprises a reed nut and an insulating sleeve, the insulating sleeve comprises a polyolefin insulating sleeve, the transformer 1 and the detection circuit board 2 are guaranteed not to be directly contacted, the performance of the detection circuit board 2 is affected, the fixing stability of the transformer 1 is achieved, and the service life of equipment is prolonged.
Example two
On the basis of the above embodiments, the embodiment of the present invention provides a voltage detection system, referring to fig. 5, in combination with fig. 1, fig. 2, fig. 3 and fig. 4, the system includes: the voltage detection apparatus 100 according to any of the above embodiments; the output end of the wind power frequency converter 6 is electrically connected with the transformer 1 included by the voltage detection device 100; and the output end of the wind driven generator 7 is electrically connected with the input end of the wind power frequency converter 6.
In the prior art, a transformer 1 is welded on a detection circuit board 2, and due to the fact that the transformer 1 is large in size and heavy in weight, a wind driven generator vibrates greatly in the operation process, so that a wind power frequency converter vibrates greatly, the transformer is easy to work unstably or generate heat to shorten the service life of the transformer in long-term strong vibration, and in view of the above faults, the transformer 1 works unstably to cause the detection circuit board 2 to fail or the transformer 1 generates heat to shorten the service life of the transformer, and the whole device is caused to fail.
The voltage detection system in the embodiment of the present invention adopts the voltage detection device in the above embodiment, wherein the transformer 1 includes the insulating connecting member 10, the insulating connecting member 10 includes the connecting portion 11 and the stud 12, the connecting portion 11 of the insulating connecting member 10 is disposed in the transformer 1, the stud 12 of the insulating connecting member 10 is exposed outside, the stud 12 of the transformer 1 passes through the threaded hole 20 and is in threaded connection with the insulating nut 3, and is fixed on the detection circuit board 2, compared with the prior art in which the insulating connecting member 10 is in threaded connection with the transformer 1, the connecting portion 11 of the insulating connecting member 10 is disposed in the transformer 1, without drilling and tapping in the transformer 1, the insulating connecting member 10 and the transformer 1 are an integral structure, when the stud 12 of the transformer 1 passes through the threaded hole 20 and is in threaded connection with the insulating nut 3, and is fixed on the detection circuit board 2, the service lives of the insulating connecting piece 10 and the transformer 1 are prolonged, and the technical problem that the voltage signals of wind power generation cannot be well collected due to frequent faults of a detection circuit board in the prior art is solved. Compare among the prior art with transformer 1 welding on detection circuit board 2, transformer 1's in this embodiment stud 12 passes screw hole 20 and insulating nut 3 threaded connection, fixes on detection circuit board 2, and insulating connecting piece 10 includes the nylon screw, and nylon screw mechanical strength is high, and toughness is good, has higher tensile, compressive strength and specific compressive strength, and is strong to the absorptive capacity of impact, stress and vibration, and impact strength is higher than general plastics. Therefore, when the vibration sense of the wind power frequency converter is strong, the influence on the transformer 1 with the nylon screw arranged inside is not great. The voltage detection device also comprises an insulating damping unit 4 which is sleeved on the stud 12 and is positioned between the detection circuit board 2 and the transformer 1. The insulating damping unit 4 is sleeved on the stud 12 and located between the detection circuit board 2 and the transformer 1, has a damping function, can alleviate the influence of vibration of the wind power frequency converter on the whole of the transformer and the detection circuit board under the condition that the whole stress of the transformer and the detection circuit board is unbalanced, and prevents the transformer and the detection circuit board from shaking to cause the looseness of the whole structure. The sealing layer of the transformer 1 is a heat-conducting epoxy adhesive sealing layer, and compared with epoxy resin adhesive, the heat-conducting epoxy adhesive has better heat conductivity. The heat-conducting adhesive has the characteristics of low viscosity and high heat conductivity, has a good heat dissipation effect, and prolongs the service life of the transformer 1.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A voltage detection device, comprising:
the transformer is used for acquiring a first voltage signal of external equipment and converting the first voltage signal into a second voltage signal, and comprises an insulating connecting piece, wherein the insulating connecting piece comprises a connecting part and a stud;
the detection circuit board is provided with at least one threaded hole, the number of the threaded holes is the same as that of the insulation connecting pieces, and the threaded holes are arranged in a one-to-one correspondence manner;
the number of the insulating nuts is the same as that of the threaded holes;
and the stud of the transformer penetrates through the threaded hole to be in threaded connection with the insulating nut and is fixed on the detection circuit board, and the detection circuit board is provided with a processing unit which is electrically connected with an output pin of the transformer and receives the second voltage signal.
2. Voltage detection device according to claim 1,
the transformer comprises a shell, a sealing layer and a voltage conversion element, wherein the sealing layer is filled between the shell and the voltage conversion element, the connecting part is arranged in the sealing layer, the stud extends out of the sealing layer, and the voltage conversion element is used for converting the first voltage signal into the second voltage signal.
3. The voltage detection apparatus according to claim 2,
the insulating connecting piece comprises a nylon screw, a screw cap of the nylon screw is used as the connecting part and is arranged in the sealing layer, and a screw rod of the nylon screw extends out of the sealing layer.
4. The voltage detection apparatus according to claim 1,
the insulating nut comprises a nylon nut.
5. The voltage detection apparatus according to claim 1,
the double-screw bolt is sleeved with the insulation damping unit, and the insulation damping unit is positioned between the detection circuit board and the transformer.
6. The voltage detection apparatus according to claim 5,
the insulation damping unit comprises a reed nut and an insulation sleeve, the insulation sleeve wraps the reed nut, and the reed nut is sleeved on the stud.
7. The voltage detection apparatus according to claim 6,
the insulating sleeve comprises a polyolefin insulating sleeve.
8. The voltage detection apparatus according to claim 1,
the transformer comprises a silicon rubber bonding layer arranged between a stud of the transformer and an insulating nut.
9. The voltage detection apparatus according to claim 2 or 3,
the sealing layer comprises an epoxy glue sealing layer.
10. A voltage detection system, comprising: a voltage detection device according to any one of claims 1 to 9;
the output end of the wind power frequency converter is electrically connected with a transformer included by the voltage detection device;
and the output end of the wind driven generator is electrically connected with the input end of the wind power frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446328.0U CN210923813U (en) | 2019-09-02 | 2019-09-02 | Voltage detection device and voltage detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446328.0U CN210923813U (en) | 2019-09-02 | 2019-09-02 | Voltage detection device and voltage detection system |
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| Publication Number | Publication Date |
|---|---|
| CN210923813U true CN210923813U (en) | 2020-07-03 |
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| CN201921446328.0U Active CN210923813U (en) | 2019-09-02 | 2019-09-02 | Voltage detection device and voltage detection system |
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| CN (1) | CN210923813U (en) |
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Effective date of registration: 20210104 Address after: 201101 Room 102, building 9, no.1366 Qishen Road, Minhang District, Shanghai Patentee after: SHANGHAI TN INDUSTRIAL Co.,Ltd. Patentee after: KUAIBEI NEW ENERGY TECHNOLOGY (SHANGHAI) Co.,Ltd. Address before: 201101 Building 9, No. 1366, Qishen Road, Minhang District, Shanghai Patentee before: SHANGHAI TN INDUSTRIAL Co.,Ltd. |
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Denomination of utility model: Voltage detection device and voltage detection system Effective date of registration: 20211108 Granted publication date: 20200703 Pledgee: Bank of Jiangsu Co.,Ltd. Shanghai Zhabei sub branch Pledgor: SHANGHAI TN INDUSTRIAL CO.,LTD.|KUAIBEI NEW ENERGY TECHNOLOGY (SHANGHAI) Co.,Ltd. Registration number: Y2021310000099 |
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Date of cancellation: 20231214 Granted publication date: 20200703 Pledgee: Bank of Jiangsu Co.,Ltd. Shanghai Zhabei sub branch Pledgor: SHANGHAI TN INDUSTRIAL CO.,LTD.|KUAIBEI NEW ENERGY TECHNOLOGY (SHANGHAI) Co.,Ltd. Registration number: Y2021310000099 |