CN108306349A - Battery equalization sampling method - Google Patents
Battery equalization sampling method Download PDFInfo
- Publication number
- CN108306349A CN108306349A CN201710031077.9A CN201710031077A CN108306349A CN 108306349 A CN108306349 A CN 108306349A CN 201710031077 A CN201710031077 A CN 201710031077A CN 108306349 A CN108306349 A CN 108306349A
- Authority
- CN
- China
- Prior art keywords
- period
- sampling
- battery
- balanced
- voltage
- 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.)
- Pending
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 238000009472 formulation Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
Classifications
-
- H02J7/0021—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
Abstract
The invention discloses a battery equalization sampling method, which comprises the following steps: step one, obtaining a total voltage sampling period Ta of a system level; determining ADC voltage sampling time Tb and filter capacitor stable decoupling time Tc; step three, calculating the allowable battery voltage balance starting time Td, wherein the formula is as follows: td is Ta-Tb-Tc; and step four, a switching strategy is formulated according to Tc, Tb and Td, and a decoupling period, a sampling period and an equalization period are circularly arranged in sequence. Compared with the prior art, the method and the device have the advantages that the total voltage sampling period is redistributed, the periods such as sampling, balancing, stabilizing and the like are carried out in a time-sharing mode under the condition that the requirement of customer sampling time is met, voltage detection errors caused during battery balancing are avoided, the detection precision is improved, and the method and the device are suitable for battery balancing and simultaneous sampling detection in the hybrid electric vehicle.
Description
Technical field
The invention belongs to field of batteries, it is more particularly related to a kind of battery balanced method of sampling.
Background technology
Due to the limitation of the energy content of battery and terminal voltage, in practical application, it is usually necessary to use multiple batteries to carry out series and parallel
It combines to reach higher voltage and larger energy.And it is numerous due to the nonlinearity of battery behavior, while in battery pack
There are differences such as manufacturing process, material, use environment, the modes of connection between battery, there are capacity, terminal voltages between single battery
Inconsistent with internal resistance is can hardly be avoided；In long-term charge and discharge process, the aggravation of inconsistency between single battery can cause
The rapid decay of whole group battery capacity results even in Individual cells and is damaged because of overcharge and overdischarge.Therefore in battery
Connection in series-parallel is in use, need to carry out each single battery being used together balanced.But due to equalizing circuit and sample line
In the presence of the voltage of battery has error when equilibrium is opened.
It please refers to Fig.1 and Fig. 2, in existing automobile batteries management system (BMS), battery balanced sample circuit includes equilibrium
Driving circuit 1, balanced diagnostic circuit 2, equalizing resistance 4, balanced execution switch 5 and sampling line 3,6.As shown in Fig. 2, above-mentioned battery
The reason of generation error, is when aligned sample circuit sampling：After battery balanced unlatching, the presence of balanced loop current I1 makes inspection
There are line resistances by measuring point V2 to V5；The pressure drop of test point V5 depends on the size of balanced loop current I1.Obviously, it is opened when battery balanced
The voltage of Qi Shi, test point V5 can be less than V2, and the voltage of test point V4 can be higher than V1.At this point, the electricity between test point V1 and V2
Pressure can not directly correspond to the voltage of test point V4 to V5.So detecting the electricity of online automobile batteries in battery balanced unlatching
Pressure can have larger measurement error, and the size of measurement error depends on flowing through the electric current of equalizing resistance 4.It is opened to eliminate equilibrium
Pressure drop when opening then needs to realize by compensation or other measures.
Current aligned sample method some ignores detection error, the presence of direct allowable error, so that voltage detecting
Precision is relatively low.Also a kind of aligned sample method is by the way that the resistance in wire loop is measured and demarcated, when detecting
Increase scalar quantity, to correct cell voltage.But due to cell voltage difference, electric current when balanced can be variant, the electricity of compensation
Pressure changes with the change of cell voltage, and compensates and can only be carried out in a single point or some specific region, passes through single-point or multiple spot
Sampled voltage is corrected in calibration.Obviously, this compensation also cannot achieve whole accurate compensation.
As it can be seen that the existing battery balanced method of sampling has at least the following problems：First, to battery management system core work(
Can --- voltage detecting precision is affected；Second is that being difficult to the variation of accurate calibration pressure drop.
In view of this, it is necessory to provide a kind of battery balanced method of sampling that can be solved the above problems.
Invention content
It is an object of the invention to：A kind of can eliminate is overcome the deficiencies of the prior art and provide to examine caused by euqalizing current
Survey the battery balanced method of sampling of error.
To achieve the goals above, the present invention provides a kind of battery balanced method of samplings comprising following steps：
Step 1 obtains the total cycle T a of system-level voltage sample；
Step 2 determines that ADC voltage sample times Tb and filter capacitor stablize decoupling time Tc；
Step 3, calculates permission battery voltage balanced opening time Td, and formula is：Td=Ta-Tb-Tc；
Step 4 formulates switching strategy according to Tc, Tb, Td, and cycle arranges decoupling period, sampling period, balanced week successively
Phase.
As a kind of improvement of the battery balanced method of sampling of the present invention, the ADC voltage samples time Tb is by obtaining A/D
The sampling precision of system and the contrast table of sample rate determine.
As a kind of improvement of the battery balanced method of sampling of the present invention, the filter capacitor stablizes decoupling time Tc by obtaining
The filter capacitor C obtained in sample circuit is calculated.
As a kind of improvement of the battery balanced method of sampling of the present invention, the step 4 includes the following steps：
Selected minimum timeslice；
Entire battery core voltage sample period Ta is divided into minimum timeslice, arranges decoupling period, sampling successively in order
Period, balanced period；
It formulates switching strategy and temporally executes decoupling period, sampling period, balanced period.
As a kind of improvement of the battery balanced method of sampling of the present invention, the minimum timeslice is by battery core voltage sample period
Minimum time in Ta and Tb, Td, Tc determines.
As a kind of improvement of the battery balanced method of sampling of the present invention, the minimum timeslice is 10ms.
As a kind of improvement of the battery balanced method of sampling of the present invention, the formulation switching strategy temporally executes decoupling week
Phase, sampling period, balanced period include：
The sampling of ADC timing voltages is set, the voltage of battery is sampled in ADC voltage sample periods；
After sampling period, battery balanced switch is opened, carries out electric voltage equalization.
As a kind of improvement of the battery balanced method of sampling of the present invention, the decoupling period and the sum of sampling period duration are small
In the duration in balanced period.
As a kind of improvement of the battery balanced method of sampling of the present invention, the decoupling period, sampling period, balanced period
Duration allocation proportion is 1:1:8.
As a kind of improvement of the battery balanced method of sampling of the present invention, in the switching strategy that the step 4 is formulated, electricity
The duty ratio of pond equalizer switch is set as 1%~99%.
Compared with prior art, the present invention is meeting client's sampling by being redistributed to voltage sample total period
Under the requirement of time, the periods such as timesharing is sampled, is balanced, stablized, caused voltage detection error when avoiding battery balanced,
Accuracy of detection is improved, the battery balanced while sample detecting suitable for hybrid vehicle.
Description of the drawings
With reference to the accompanying drawings and detailed description, to the battery balanced method of sampling of the present invention and its advantageous effects into
Row is described in detail.
Fig. 1 is the circuit diagram of existing battery balanced sample circuit.
Fig. 2 is the sampling error principle analysis figure of existing battery balanced sample circuit.
Fig. 3 is the flow chart of the battery balanced method of sampling of the present invention.
Fig. 4 is the aligned sample period allocated figure of the battery balanced method of sampling of the present invention.
Fig. 5 is the sequence diagram of one embodiment of the battery balanced method of sampling of the present invention.
Specific implementation mode
It is clear in order to make the purpose of the present invention, technical solution and technique effect be more clear, below in conjunction with attached drawing and specifically
Embodiment, the present invention will be described in further detail.It should be understood that specific implementation mode described in this specification
Just for the sake of explaining the present invention, it is not intended to limit the present invention.
For existing automobile batteries aligned sample method there are the problem of, the present inventor is to aligned sample circuit
After being furtherd investigate, finds increase compensation control simply, improves compensation precision, with each factor for voltage of eliminating the effects of the act,
Reach high-precision compensation, it is whole, high under the effect of objective battery, the technological parameter difference of circuit devcie and environmental difference
The circuit design of accuracy compensation is practically impossible to the dreamboat realized.
In view of to the prior art and extension heightened awareness, inventor breaks through conventional thought, for existing automobile electricity
Pond aligned sample method has made improvement, realizes those skilled in the art and thinks impossible design object.The base of the present invention
This improved though is the angle for jumping out error quantization, is solved the problems, such as from the angle of time, i.e., by timesharing stablize, adopt
The periods such as sample and equilibrium effectively avoid influence of the euqalizing current to voltage detecting, to improve accuracy of detection.
It please refers to shown in Fig. 3, the battery balanced method of sampling of the present invention includes the following steps.
Step 11, the total cycle T a of system-level voltage sample is obtained.For battery pack system, voltage sample total period
Ta is according to the preset technical indicator of customer demand, is given value.
Step 13, determine that ADC voltage sample times Tb and filter capacitor stablize decoupling time Tc.Specifically, ADC voltages are adopted
Sample time Tb determines that filter capacitor stablizes the decoupling time by obtaining the sampling precision of A/D systems and the contrast table of sample rate
Tc is calculated by obtaining the filter capacitor C in sample circuit (because used low-pass filter calculation is already
Known to one of skill in the art, details are not described herein again).
Step 15, permission battery voltage balanced opening time Td is calculated, formula is：Td=Ta-Tb-Tc.
Step 17, switching strategy is formulated according to Tc, Tb, Td, cycle arranges decoupling period, sampling period, balanced week successively
Phase, as shown in Figure 4.Specifically, this step includes：
1) minimum timeslice is selected；Minimum timeslice is by the minimum time in battery core voltage sample period Ta and Tb, Td, Tc
It determines (Td is usually larger, therefore really takes the smaller value in Tb, Tc), such as：48V system batteries equilibrium shown in Fig. 5 is adopted
In the embodiment of quadrat method, Ta 100ms, Tb, Tc are 10ms, Td=Ta-Tb-Tc=80ms, therefore minimum timeslice is
10ms。
2) entire battery core voltage sample period Ta is divided into minimum timeslice, arranges the decoupling period successively in order, adopts
Sample period, balanced period.Specifically, the sum of decoupling period and sampling period duration are less than the duration in balanced period.Such as, decoupling week
Phase, the sampling period, the balanced period duration allocation proportion be 1:1:8.
3) it formulates switching strategy and temporally executes decoupling period, sampling period, balanced period.Specifically, setting ADC timings
Voltage sample samples the voltage of battery in ADC voltage sample periods；After sampling period, open battery balanced
Switch carries out electric voltage equalization.
It should be noted that, although in the embodiment shown in fig. 5, the duty ratio of battery balanced switch is set as 50%, but
In other embodiments, the duty ratio of battery balanced switch could be provided as 1~99% any numerical value (simply by the presence of between the time
Every).
The detailed description of the battery balanced method of sampling of the present invention can be seen that in conjunction with above of the invention by being adopted to voltage
Sample total period is redistributed, under the requirement for meeting client's sampling time, the periods such as timesharing is sampled, is balanced, stablized,
Caused voltage detection error, improves accuracy of detection when avoiding battery balanced, the battery suitable for hybrid vehicle
Balanced sample detecting simultaneously.
Compared with prior art, the battery balanced method of sampling of the present invention at least has following advantageous effects：
1) influence of the equilibrium loop current to sample detecting point voltage when battery voltage balanced is opened is eliminated, that is, is eliminated
This voltage error significantly improves the sampling precision and efficiency of automobile batteries aligned sample circuit；
2) since the time accounting of sampling period and decoupling period in voltage sample total period is small, to the shadow of portfolio effect
Sound is smaller, and portfolio effect is only dependent upon ADC voltage samples and filter capacitor stablizes decoupling leeway；
3) since time accounting of the balanced period in entire voltage sample total period is big, equalization efficiency can be made
It is very high.
According to above-mentioned principle, the present invention can also carry out change and modification appropriate to the above embodiment.Therefore, this hair
It is bright to be not limited to specific implementation mode disclosed and described above, some modifications and changes of the present invention should also be as to fall into this
In the scope of the claims of invention.In addition, although having used some specific terms, these terms in this specification
Merely for convenience of description, it does not limit the present invention in any way.
Claims (10)
1. a kind of battery balanced method of sampling, which is characterized in that the described method comprises the following steps：
Step 1 obtains the total cycle T a of system-level voltage sample；
Step 2 determines that ADC voltage sample times Tb and filter capacitor stablize decoupling time Tc；
Step 3, calculates permission battery voltage balanced opening time Td, and formula is：Td=Ta-Tb-Tc；
Step 4 formulates switching strategy according to Tc, Tb, Td, and cycle arranges decoupling period, sampling period, balanced period successively.
2. the battery balanced method of sampling according to claim 1, which is characterized in that the ADC voltage samples time Tb is logical
The contrast table for crossing the sampling precision and sample rate that obtain A/D systems determines.
3. the battery balanced method of sampling according to claim 1, which is characterized in that the filter capacitor stablizes the decoupling time
Tc is calculated by obtaining the filter capacitor C in sample circuit.
4. the battery balanced method of sampling according to claim 1, which is characterized in that the step 4 includes the following steps：
Selected minimum timeslice；
Entire battery core voltage sample period Ta is divided into minimum timeslice, in order successively arrange the decoupling period, the sampling period,
The balanced period；
It formulates switching strategy and temporally executes decoupling period, sampling period, balanced period.
5. the battery balanced method of sampling according to claim 4, which is characterized in that the minimum timeslice is by battery core voltage
Minimum time in sampling period Ta and Tb, Td, Tc determines.
6. the battery balanced method of sampling according to claim 5, which is characterized in that the minimum timeslice is 10ms.
7. the battery balanced method of sampling according to claim 4, which is characterized in that the formulation switching strategy is temporally held
Row decoupling period, sampling period, balanced period include：
The sampling of ADC timing voltages is set, the voltage of battery is sampled in ADC voltage sample periods；
After sampling period, battery balanced switch is opened, carries out electric voltage equalization.
8. the battery balanced method of sampling according to claim 1, which is characterized in that when the decoupling period is with the sampling period
The sum of long duration for being less than the balanced period.
9. the battery balanced method of sampling according to claim 8, which is characterized in that the decoupling period, the sampling period,
The duration allocation proportion in weighing apparatus period is 1:1:8.
10. the battery balanced method of sampling according to claim 1, which is characterized in that the switch that the step 4 is formulated
In strategy, the duty ratio of battery balanced switch is set as 1%~99%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710031077.9A CN108306349A (en) | 2017-01-13 | 2017-01-13 | Battery equalization sampling method |
| PCT/CN2017/092323 WO2018129884A1 (en) | 2017-01-13 | 2017-07-09 | Battery equalisation and sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710031077.9A CN108306349A (en) | 2017-01-13 | 2017-01-13 | Battery equalization sampling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108306349A true CN108306349A (en) | 2018-07-20 |
Family
ID=62839165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710031077.9A Pending CN108306349A (en) | 2017-01-13 | 2017-01-13 | Battery equalization sampling method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108306349A (en) |
| WO (1) | WO2018129884A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412601A (en) * | 2010-09-25 | 2012-04-11 | 江苏海四达电源股份有限公司 | Protection control method of low-capacity high-power lithium battery pack |
| CN102975630A (en) * | 2011-09-05 | 2013-03-20 | 三洋电机株式会社 | Power supply apparatus for vehicle and vehicle provided with same |
| US20130099723A1 (en) * | 2009-09-29 | 2013-04-25 | O2Micro Inc. | Systems and methods for cell balancing |
| CN103531857A (en) * | 2013-10-25 | 2014-01-22 | 惠州市亿能电子有限公司 | BMS (battery management system) balance control method |
| CN103997103A (en) * | 2014-06-14 | 2014-08-20 | 国家电网公司 | Lagging battery voltage balance device |
| CN105789715A (en) * | 2016-02-25 | 2016-07-20 | 上海大学 | Battery sampling and equalization circuits sharing switch array |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053226B (en) * | 2009-10-29 | 2013-04-10 | 比亚迪股份有限公司 | Device and method for testing internal resistance of battery |
| CN102195310B (en) * | 2010-03-12 | 2014-11-05 | 株式会社东芝 | Combination battery unit and vehicle |
| CN103311991B (en) * | 2013-06-21 | 2016-08-24 | 惠州市亿能电子有限公司 | A kind of battery management system and equilibrium state on-line monitoring method thereof |
| CN104617612B (en) * | 2015-01-07 | 2017-01-04 | 杭州协能科技股份有限公司 | A kind of universal control circuit of active equalization |
| CN105620291B (en) * | 2015-12-25 | 2018-03-23 | 北京新能源汽车股份有限公司 | Detect method, unit and the battery management system of cell voltage |
-
2017
- 2017-01-13 CN CN201710031077.9A patent/CN108306349A/en active Pending
- 2017-07-09 WO PCT/CN2017/092323 patent/WO2018129884A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130099723A1 (en) * | 2009-09-29 | 2013-04-25 | O2Micro Inc. | Systems and methods for cell balancing |
| CN102412601A (en) * | 2010-09-25 | 2012-04-11 | 江苏海四达电源股份有限公司 | Protection control method of low-capacity high-power lithium battery pack |
| CN102975630A (en) * | 2011-09-05 | 2013-03-20 | 三洋电机株式会社 | Power supply apparatus for vehicle and vehicle provided with same |
| CN103531857A (en) * | 2013-10-25 | 2014-01-22 | 惠州市亿能电子有限公司 | BMS (battery management system) balance control method |
| CN103997103A (en) * | 2014-06-14 | 2014-08-20 | 国家电网公司 | Lagging battery voltage balance device |
| CN105789715A (en) * | 2016-02-25 | 2016-07-20 | 上海大学 | Battery sampling and equalization circuits sharing switch array |
Non-Patent Citations (7)
| Title |
|---|
| 夏斌: "一种锂电池组动态调整型主动均衡方法研究与设计", 《电子世界》 * |
| 张明峰编著: "《PIC单片机入门与实战》", 30 September 2004, 北京航空航天大学出版社 * |
| 时景立: "空间卫星用锂电池均衡控制器的设计与实现", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 朱玉龙编著: "《汽车电子硬件设计》", 31 October 2011, 北京航空航天大学出版社 * |
| 秦嘉琦 等: "一种副边切换的电池组均衡系统研究", 《工业控制计算机》 * |
| 董祥千主编: "《计算机操作系统 Linux 教程》", 31 July 2012, 东软电子出版社 * |
| 高宗伟: "磷酸铁锂电池管理系统软件设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018129884A1 (en) | 2018-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107991623B (en) | Battery ampere-hour integral SOC estimation method considering temperature and aging degree | |
| CN105301509B (en) | The combined estimation method of charge states of lithium ion battery, health status and power rating | |
| CN102156265B (en) | Device and method for testing health state of battery | |
| CN109921111B (en) | Method and system for estimating internal temperature of lithium ion battery | |
| CN106483462B (en) | A kind of measurement method and device of battery charge | |
| CN105510847B (en) | The screening technique of lithium ion battery consistency | |
| CN111722118B (en) | Lithium ion battery SOC estimation method based on SOC-OCV optimization curve | |
| CN109991548A (en) | A kind of OCV-SOC method of calibration experiment, battery equivalent model parameter identification method and SOC estimation method | |
| CN107402355B (en) | A kind of charging time predictor method | |
| CN101101323A (en) | Lithium battery capacity quick detection method | |
| WO2019140956A1 (en) | Electricity quantity metering accuracy detection method, device and computer storage medium | |
| CN105738828B (en) | A kind of battery capacity accurately measures method | |
| CN109490790B (en) | Method and device for testing power characteristics of lithium power battery by adopting compensation pulse method | |
| CN112327180A (en) | Lithium ion battery self-discharge evaluation and voltage balance adjustment method thereof | |
| CN109655758B (en) | Battery open-circuit voltage measuring method and system | |
| CN105277791A (en) | Method for on-line detection of internal resistance of a storage battery by performing low-direct-current discharge twice | |
| CN105093125A (en) | Single nickel-hydrogen battery consistency evaluation system and method | |
| CN110221224A (en) | Prediction technique, device and the storage medium of battery cycle life | |
| CN108983109A (en) | Electric current estimation chip, evaluation method and remaining capacity metering system for battery | |
| CN109061498A (en) | A kind of battery dump energy metering chip and metering method | |
| CN102393509A (en) | Nondestructive evaluation method for performance of lithium ion battery | |
| CN110687469B (en) | Lithium ion battery constant volume method | |
| CN109669138B (en) | Method for accurately measuring residual capacity of power lead storage battery pack | |
| CN108306349A (en) | Battery equalization sampling method | |
| CN106970329B (en) | method for judging relative health condition of batteries and battery pack power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180720 |
|
| RJ01 | Rejection of invention patent application after publication |