CN207038593U - A kind of ternary battery pack safeguard construction provided with displacement apparatus - Google Patents
A kind of ternary battery pack safeguard construction provided with displacement apparatus Download PDFInfo
- Publication number
- CN207038593U CN207038593U CN201721003726.6U CN201721003726U CN207038593U CN 207038593 U CN207038593 U CN 207038593U CN 201721003726 U CN201721003726 U CN 201721003726U CN 207038593 U CN207038593 U CN 207038593U
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- China
- Prior art keywords
- gas
- battery pack
- battery case
- valve
- displacement apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 238000006467 substitution reaction Methods 0.000 claims abstract description 19
- 238000009423 ventilation Methods 0.000 claims abstract description 17
- 239000003063 flame retardant Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 84
- 238000001514 detection method Methods 0.000 claims description 19
- 239000001301 oxygen Substances 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- NSGXIBWMJZWTPY-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropane Chemical compound FC(F)(F)CC(F)(F)F NSGXIBWMJZWTPY-UHFFFAOYSA-N 0.000 claims description 3
- 206010003497 Asphyxia Diseases 0.000 claims description 3
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000000779 smoke Substances 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- -1 He or Ar Chemical compound 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of ternary battery pack safeguard construction provided with displacement apparatus, including the battery case and air ventilation device being connected, and battery pack is provided with battery case, multiple cells are provided with battery pack；Battery case has the housing of sealing structure, and case top is provided with relief valve, and housing both sides are respectively provided with a valve cock, are full of fire-retardant gas in housing；Air ventilation device includes：Substitution gas generation unit, discharge gas buffer unit, displacement controller, air inlet electromagnetic valve, outlet magnetic valve and two gas transmission pipelines, substitution gas generation unit are connected with discharge gas buffer unit；Air inlet electromagnetic valve and outlet magnetic valve are respectively arranged on two gas transmission pipelines, the both ends of gas transmission pipeline provided with air inlet electromagnetic valve are respectively connected to a valve cock and substitution gas generation unit for battery case, and the both ends of the gas transmission pipeline provided with outlet magnetic valve are respectively connected to another valve cock and discharge gas buffer unit.
Description
Technical field
It the utility model is related to ternary technical field of lithium batteries, more particularly to a kind of ternary battery pack provided with displacement apparatus
Safeguard construction.
Background technology
The security performance of ternary lithium battery is the problem of current driving force battery industry is most paid close attention to.Ternary battery is due to cyclicity
The advantages that energy is good, and energy density is high, progressively applies on new-energy automobile.But ternary material battery core is in terms of security performance,
Especially because overcharge the thermal runaway of initiation and the phenomenon of easy blast on fire on lancing test be present, it is impossible to pass through security
It can detect, define its large-scale application in electrokinetic cell.In actual motion, due to the reason such as vibrating, colliding, it is likely that
Ternary battery core is triggered to pierce through, leakage.Because ternary material battery core thermal structure is unstable, high temperature safety is poor, and pH value is too high
Easily make monomer flatulence, and the chemistry reflection of ternary lithium material is more violent, can discharge oxygen molecule, the electrolyte under high temperature action
Rapid burning, occurs chain reaction.In order to expand the use range of ternary battery, safety Design is the task of top priority.
In order to improve the security performance of ternary battery, the security protection to ternary battery at present mainly improves from internal material
Carried out with the aspect of external structure piece optimization two.Internal material, which improves, mainly includes positive electrode surface cladding, modified electrode or barrier film material
The methods of material, feature electrolysis additive, external structure piece optimization mainly passes through explosion-proof valve threshold value, discharge device, PTC temperature-sensitives
Element adds the means such as insulation protection liquid to improve ternary battery safety in battery case.
Although preceding method has properly increased the security performance of ternary battery, have the following disadvantages：Material improvement can
So that ternary battery avoids thermal runaway when overcharging with short-circuit test, but internal short-circuit of battery can still be led when puncturing
Cause battery catches fire；Feature electrolysis additive can reduce the high rate performance and cycle performance of ternary battery to a certain extent；
External safeguard procedures still have certain risk, for example the method for insulation protection liquid is added in battery case, considerably increase
Battery case weight, and cost is higher, because the thermal runaway that battery material triggers in itself can aggravate decomposition and the barrier film oxygen of electrolyte
Change, when electrolyte leakage occurs for battery the relief valve on battery case can be caused to open, cause potential safety hazard.
Utility model content
The utility model is directed to above-mentioned the shortcomings of the prior art, there is provided a kind of ternary battery pack provided with displacement apparatus
Safeguard construction, fire-retardant gas is injected in ternary battery case, using oxygen concentration in oxygen concentration sensor monitoring battery case, oxygen concentration
Gas displacement is carried out during more than combustion threshold, oxygen concentration in case is maintained at below combustion threshold, can effectively prevent ternary battery
The fire that thermal runaway triggers.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：
A kind of ternary battery pack safeguard construction provided with displacement apparatus, including the battery case being connected and gas displacement dress
Put, wherein, battery pack is provided with the battery case, multiple cells are provided with the battery pack；The battery case has close
The housing of seal structure, case top are provided with relief valve, and housing both sides are respectively provided with a valve cock, are full of fire-retardant gas in housing；
The air ventilation device includes：Substitution gas generation unit, discharge gas buffer unit, displacement controller, air inlet electromagnetic valve,
Outlet magnetic valve and two gas transmission pipelines, wherein, the substitution gas generation unit produces substitution gas, itself and the row
Go out gas buffer unit to be connected；The displacement controller is controlled to the replacement process of gas；The air inlet electromagnetic valve and
The outlet magnetic valve is respectively arranged on two gas transmission pipelines, the both ends point of the gas transmission pipeline provided with air inlet electromagnetic valve
A valve cock of battery case and the substitution gas generation unit of air ventilation device, the gas provided with outlet magnetic valve are not connected to
The both ends of conveyance conduit are respectively connected to another valve cock of battery case and the discharge gas buffer unit of air ventilation device.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
Further, controller for detection and extinguishing device are additionally provided with the battery case, the controller for detection includes number
According to detection device and control device, the parameters in battery case are monitored in real time and are controlled.
Further, the data detecting device includes：Oxygen concentration sensor, pressure sensor, gas sensor, temperature
Sensor and Smoke Sensor.
Further, communication connection is provided between the controller for detection in the displacement controller and battery case, can carried out
Data transfer.
Preferably, the extinguishing device uses clean gas extinguisher.
Alternatively, the fire-retardant gas is N2、CO2, He or Ar.
Alternatively, the fire-retardant gas is or heptafluoro-propane, HFC-236fa.
Preferably, the discharge gas buffer unit is also associated with tail gas transfer passage, and the gas displaced is carried
Place that is pure or being discharged to scarcity, prevent from causing asphyxia to be poisoned.
Compared with prior art, the utility model can produce following technique effect：
1st, fire-retardant gas is filled with battery case, oxygen concentration in case is maintained at below combustion threshold, can effectively avoid three
First battery is because of the phenomenon on fire of electrolyte leakage or thermal runaway initiation；
2nd, oxygen concentration value in battery case is detected in real time, when oxygen concentration is higher than electrolyte combustion threshold alarm, notice work
Personnel, and then line replacement is entered to the gas in battery case by air ventilation device, while pressure in battery case is detected, prevent from putting
Pressure is excessive in battery case during changing breaks through relief valve, until oxygen concentration is dropped to below secure threshold, improves ternary battery
Security performance；Gas displacement is convenient, economically feasible, easy care.
Brief description of the drawings
Fig. 1 is the structural representation of the ternary battery pack safeguard construction of the present utility model provided with displacement apparatus；
In the accompanying drawings, the list of designations represented by each label is as follows：
100 battery cases
101 battery packs
102 housings
103 relief valves
104 valve cocks
200 air ventilation devices
201 substitution gas generation units
202 discharge gas buffer units
203 displacement controllers
204 air inlet electromagnetic valves
205 outlet magnetic valves
206 gas transmission pipelines
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
Please also refer to shown in Fig. 1, Fig. 1 is the knot of the ternary battery pack safeguard construction of the present utility model provided with displacement apparatus
Structure schematic diagram, the safeguard construction include the battery case 100 and air ventilation device 200 being connected, wherein,
Battery pack 101 is provided with the battery case 100, multiple cells are provided with the battery pack 101；The battery
Case 100 has the housing 102 of sealing structure, and case top is provided with relief valve 103, and housing both sides are provided with valve cock 104, in housing
Full of fire-retardant gas；Wherein,
The fire-retardant gas can be N2、CO2, the clean gas such as inert gas or heptafluoro-propane, HFC-236fa such as He or Ar,
It is every all to can be considered selection standard scope without material flammable, that there is the characteristics such as preferable stability under gaseous state；
In addition, being additionally provided with controller for detection 105 and extinguishing device 106 in the battery case 100, controller for detection includes number
According to detection device and control device, for monitoring the parameters in battery case in real time, and there is control function, when monitoring electricity
Extinguishing device can be started during the thermal runaway of pond and suppress thermal runaway sprawling；Data detecting device includes oxygen concentration sensor, pressure sensing
Device, gas sensor, temperature sensor and Smoke Sensor；Extinguishing device preferentially uses clean gas extinguisher, can be urgent
In the case of start, prevent battery thermal runaway spread.Controller for detection is reserved with communication interface, can be with battery management system, vehicle
Controller, intelligence instrument, air ventilation device etc. are communicated, and upload Monitoring Data and warning message.
The air ventilation device 200 includes：Substitution gas generation unit 201, discharge gas buffer unit 202, displacement
Controller 203, air inlet electromagnetic valve 204, outlet magnetic valve 205 and two gas transmission pipelines 206, wherein,
The substitution gas generation unit 201 is used to produce substitution gas, itself and the phase of discharge gas buffer unit 202
Connection；
The displacement controller 203 is used to be controlled the replacement process of gas；Preferably, the displacement controller
203 and battery case in controller for detection 105 have communication connection, can carry out data transmission；
The air inlet electromagnetic valve 204 and the outlet magnetic valve 205 are respectively arranged on two gas transmission pipelines 206, if
The both ends for having the gas transmission pipeline of air inlet electromagnetic valve are respectively connected to a valve cock of battery case and putting for air ventilation device
Gas production unit 201 is changed, the both ends of the gas transmission pipeline provided with outlet magnetic valve are respectively connected to another gas of battery case
The discharge gas buffer unit of door mouth and air ventilation device.
Preferably, the discharge gas buffer unit 202 is also associated with tail gas transfer passage, and the gas displaced is carried out
The place of scarcity is purified or be discharged to, prevents from causing asphyxia to be poisoned.
In the ternary battery pack safeguard construction of the present utility model provided with displacement apparatus, full of fire-retardant in the battery case
Gas, oxygen concentration, pressure, gas, smog and temperature ginseng in the real-time monitoring case of controller for detection during normal operation in battery case
Number, when oxygen concentration exceeds combustion threshold, controller for detection is alarmed, and notifies staff to carry out the gas in battery case
Displacement；Substitution gas generation unit is connected by gas transmission pipeline with battery case valve cock, discharges gas buffer unit and electricity
Case another valve cock in pond is connected.Controller for detection and displacement controller in battery case are communicated, by what is real-time monitored
Oxygen concentration, pressure, gas, smog, temperature parameter send displacement controller in battery case.Displacement controller sends control letter
Number, open air inlet electromagnetic valve and outlet magnetic valve enters line replacement to the gas in battery case.Substitution gas generation unit exports gas
The pressure of body is P1, and the pressure of discharge gas buffer unit porch is P2, and pressure is P3 in battery case, P1 ＞ during substitution gas
P2=P3.The setting of air ventilation device both ends magnetic valve may be such that the pressure in battery case is maintained in stability range.Work as oxygen
When concentration is dropped to below combustion threshold, the connection of battery case and air ventilation device is disconnected, each valve is closed, is replaced.
When controller for detection judges to occur in battery case electrolyte leakage according to each detection parameters, alarm signal is sent,
Staff is notified to be overhauled；When judging generation thermal runaway in battery case, controller for detection sends emergency alarm,
And start extinguishing device, suppress the sprawling of battery thermal runaway early.
In the ternary battery pack safeguard construction of the present utility model provided with displacement apparatus, fire-retardant gas is filled with battery case
Body, oxygen concentration in case is maintained at below combustion threshold, can effectively prevent ternary battery from triggering because of electrolyte leakage or thermal runaway
Phenomenon on fire, and the high rate performance and cycle performance of battery will not be reduced, other potential safety hazards will not be caused；Gas displacement side
Just, economically feasible, easy care；Extinguishing device in case can in case of emergency start, and electricity occurs in battery case once detecting
Pond thermal runaway, extinguishing device can be started and temporarily suppressed, raced against time for processing in next step.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (8)
1. a kind of ternary battery pack safeguard construction provided with displacement apparatus, it is characterised in that the battery case including being connected is gentle
Body displacement apparatus, wherein,
Battery pack is provided with the battery case, multiple cells are provided with the battery pack；There is the battery case sealing to tie
The housing of structure, case top are provided with relief valve, and housing both sides are respectively provided with a valve cock, are full of fire-retardant gas in housing；
The air ventilation device includes：Substitution gas generation unit, discharge gas buffer unit, replace controller, enter pneumoelectric
Magnet valve, outlet magnetic valve and two gas transmission pipelines, wherein, the substitution gas generation unit produces substitution gas, its with
The discharge gas buffer unit is connected；The displacement controller is controlled to the replacement process of gas；
The air inlet electromagnetic valve and the outlet magnetic valve are respectively arranged on two gas transmission pipelines, provided with air inlet electromagnetic valve
The both ends of gas transmission pipeline are respectively connected to a valve cock of battery case and the substitution gas generation unit of air ventilation device,
The both ends of gas transmission pipeline provided with outlet magnetic valve are respectively connected to another valve cock and air ventilation device of battery case
Discharge gas buffer unit.
2. the ternary battery pack safeguard construction according to claim 1 provided with displacement apparatus, it is characterised in that the battery
Controller for detection and extinguishing device are additionally provided with case, the controller for detection includes data detecting device and control device, in real time
Monitor the parameters in battery case and be controlled.
3. the ternary battery pack safeguard construction according to claim 2 provided with displacement apparatus, it is characterised in that the data
Detection device includes：Oxygen concentration sensor, pressure sensor, gas sensor, temperature sensor and Smoke Sensor.
4. the ternary battery pack safeguard construction provided with displacement apparatus according to Claims 2 or 3, it is characterised in that described
Communication connection is provided between controller for detection in displacement controller and battery case, can be carried out data transmission.
5. the ternary battery pack safeguard construction provided with displacement apparatus according to Claims 2 or 3, it is characterised in that described
Extinguishing device uses clean gas extinguisher.
6. the ternary battery pack safeguard construction provided with displacement apparatus according to any one of claims 1 to 3, its feature exist
In the fire-retardant gas is N2、CO2, He or Ar.
7. the ternary battery pack safeguard construction provided with displacement apparatus according to any one of claims 1 to 3, its feature exist
In the fire-retardant gas is heptafluoro-propane or HFC-236fa.
8. the ternary battery pack safeguard construction provided with displacement apparatus according to any one of claims 1 to 3, its feature exist
In the discharge gas buffer unit is also associated with tail gas transfer passage, and people is purified or be discharged to by the gas displaced
The rare place of member, prevent from causing asphyxia to be poisoned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721003726.6U CN207038593U (en) | 2017-08-11 | 2017-08-11 | A kind of ternary battery pack safeguard construction provided with displacement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721003726.6U CN207038593U (en) | 2017-08-11 | 2017-08-11 | A kind of ternary battery pack safeguard construction provided with displacement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207038593U true CN207038593U (en) | 2018-02-23 |
Family
ID=61487156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721003726.6U Withdrawn - After Issue CN207038593U (en) | 2017-08-11 | 2017-08-11 | A kind of ternary battery pack safeguard construction provided with displacement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207038593U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331818A (en) * | 2017-08-11 | 2017-11-07 | 烟台创为新能源科技有限公司 | A kind of ternary battery pack safeguard construction provided with displacement apparatus |
-
2017
- 2017-08-11 CN CN201721003726.6U patent/CN207038593U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331818A (en) * | 2017-08-11 | 2017-11-07 | 烟台创为新能源科技有限公司 | A kind of ternary battery pack safeguard construction provided with displacement apparatus |
| CN107331818B (en) * | 2017-08-11 | 2023-06-02 | 烟台创为新能源科技股份有限公司 | Ternary battery pack safety structure with replacement device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 264006 Shandong city of Yantai Province Economic and Technological Development Zone Jinsha River Road No. 163 Patentee after: Yantai Chuangwei New Energy Technology Co.,Ltd. Address before: 264006 Shandong city of Yantai Province Economic and Technological Development Zone Jinsha River Road No. 163 Patentee before: YANTAI CHUNGWAY NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yantai Yida Financial Leasing Co.,Ltd. Assignor: Yantai Chuangwei New Energy Technology Co.,Ltd. Contract record no.: X2020980008903 Denomination of utility model: A safety structure of ternary battery pack with displacement device Granted publication date: 20180223 License type: Exclusive License Record date: 20201208 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A safety structure of ternary battery pack with displacement device Effective date of registration: 20201210 Granted publication date: 20180223 Pledgee: Yantai Yida Financial Leasing Co.,Ltd. Pledgor: Yantai Chuangwei New Energy Technology Co.,Ltd. Registration number: Y2020980009068 |
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| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20180223 Effective date of abandoning: 20230602 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180223 Effective date of abandoning: 20230602 |
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| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Yantai Yida Financial Leasing Co.,Ltd. Assignor: Yantai Chuangwei New Energy Technology Co.,Ltd. Contract record no.: X2020980008903 Date of cancellation: 20231030 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231031 Granted publication date: 20180223 Pledgee: Yantai Yida Financial Leasing Co.,Ltd. Pledgor: Yantai Chuangwei New Energy Technology Co.,Ltd. Registration number: Y2020980009068 |