CN102955067A - Movable power supply discharging current detecting method and system - Google Patents
Movable power supply discharging current detecting method and system Download PDFInfo
- Publication number
- CN102955067A CN102955067A CN2012104100512A CN201210410051A CN102955067A CN 102955067 A CN102955067 A CN 102955067A CN 2012104100512 A CN2012104100512 A CN 2012104100512A CN 201210410051 A CN201210410051 A CN 201210410051A CN 102955067 A CN102955067 A CN 102955067A
- Authority
- CN
- China
- Prior art keywords
- voltage
- threshold value
- load
- integrated chip
- discharge current
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007599 discharging Methods 0.000 title abstract 6
- 238000001514 detection method Methods 0.000 claims description 37
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a movable power supply discharging current detecting method and system. The movable power supply discharging current detecting method comprises the steps that: a boost integrated chip obtains a modulation voltage at a driving pulse width/frequency modulation end of the boost integrated chip; an analogue-digital converter obtains a sampling voltage corresponding to the modulation voltage; and when a microprocessor judges that the sampling voltage is less than a no-load voltage threshold value, no-load protection treatment can be carried out. According to the movable power supply discharging current detecting method and system provided by the invention, the requirement of high-precision ADC (Analogue-Digital Converter) can be overcome, and the addition of an amplifying circuit can be avoided, so that a discharging current can be monitored by using the ordinary-precision or low-precision ADC. The movable power supply discharging current detecting method and system are beneficial to simplification of the circuit and reduction of hardware cost.
Description
Technical field
The present invention relates to power supply detection technique field, specially refer to portable power source discharge current detection method and system.
Background technology
The discharge current of portable power source detects, and mainly is that the zero load to portable power source detects, and requires testing circuit can detect accurately the current point voltage of portable power source when zero load.At present, the discharge current of portable power source detects and mainly contains following dual mode: a kind of is to utilize high-precision ADC(Analog to Digital Converter, A-D converter) MCU detects the voltage of leakage resistance, but the height that this detection mode is suitable to the ADC accuracy requirement, want to detect accurately and just require ADC to have very high accuracy of detection, increased hardware cost; Another kind is to amplify the voltage of examining on the leakage resistance by discharge circuit, and the MCU of recycling general precision ADC detects, but increasing discharge circuit can increase hardware cost equally.
Summary of the invention
Fundamental purpose of the present invention reduces hardware cost for providing a kind of, guarantees portable power source discharge current detection method and the system of accuracy of detection.
The present invention proposes a kind of portable power source discharge current detection method, comprises step:
The integrated chip that boosts obtains the modulation voltage of the driving pulse width/frequency modulated terminal of the described integrated chip that boosts;
A-D converter obtains sampled voltage corresponding to described modulation voltage;
When microprocessor is judged described sampled voltage less than the no-load voltage threshold value, carry out no-load protection and process.
Preferably, also comprise before the step of the modulation voltage of the driving pulse width/frequency modulated terminal of the described described integrated chip that boosts of integrated chip acquisition that boosts:
The described integrated chip that boosts obtains the unloaded modulation voltage of described driving pulse width/frequency modulated terminal;
Described A-D converter obtains no-load voltage corresponding to described unloaded modulation voltage;
Described microprocessor is defined as the no-load voltage threshold value with described no-load voltage.
Preferably, described when microprocessor is judged described sampled voltage less than the no-load voltage threshold value, the step of carrying out the no-load protection processing specifically comprises:
When described microprocessor was judged described sampled voltage less than the no-load voltage threshold value, the described sampled voltage of accumulative total was less than the number of times of no-load voltage threshold value;
Judging described sampled voltage when described microprocessor, carries out no-load protection and processes during greater than unloaded frequency threshold value less than the number of times of no-load voltage threshold value.
Preferably, described modulation voltage is corresponding with the discharge current of the described integrated chip that boosts.
The present invention also proposes a kind of portable power source discharge current detection system, comprising:
The integrated chip that boosts is used for obtaining the modulation voltage of the driving pulse width/frequency modulated terminal of the described integrated chip that boosts;
A-D converter is used for obtaining sampled voltage corresponding to described modulation voltage;
Microprocessor is used for when judging described sampled voltage less than the no-load voltage threshold value, carries out no-load protection and processes.
Preferably, the described integrated chip that boosts specifically is used for, and obtains the unloaded modulation voltage of described driving pulse width/frequency modulated terminal;
Described analog to digital conversion implement body is used for, and obtains no-load voltage corresponding to described unloaded modulation voltage;
Described microprocessor specifically is used for, and described no-load voltage is defined as the no-load voltage threshold value.
Preferably, described microprocessor specifically is used for:
When judging described sampled voltage less than the no-load voltage threshold value, the described sampled voltage of accumulative total is less than the number of times of no-load voltage threshold value;
When judging that described sampled voltage, carries out no-load protection and processes during greater than unloaded frequency threshold value less than the number of times of no-load voltage threshold value.
Preferably, described modulation voltage is corresponding with the discharge current of the described integrated chip that boosts.
The present invention has overcome the requirement of high-precision adc, has avoided the increase of amplifying circuit, only adopts the ADC of general precision or low precision can realize monitoring to discharge current being conducive to simplify circuit, reduces hardware cost.
Description of drawings
Fig. 1 is the process flow diagram of the first embodiment of portable power source discharge current detection method of the present invention;
Fig. 2 is the process flow diagram of the second embodiment of portable power source discharge current detection method of the present invention;
Fig. 3 is the process flow diagram of the 3rd embodiment of portable power source discharge current detection method of the present invention;
Fig. 4 is the structural representation of portable power source discharge current detection system of the present invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, Fig. 1 is the process flow diagram of the first embodiment of portable power source discharge current detection method of the present invention.The portable power source discharge current detection method that present embodiment is mentioned comprises:
Step S10, the integrated chip that boosts obtain the to boost modulation voltage of driving pulse width/frequency modulated terminal of integrated chip;
In the present embodiment, the driving pulse width/frequency modulated terminal of integrated chip is unloaded and when load is arranged owing to boost, modulation voltage on the driving pulse width/frequency modulated terminal changes quite obvious, can directly reflect the discharge current of the integrated chip that boosts, there is corresponding relation in the discharge current that is modulation voltage and the integrated chip that boosts, utilize the MCU of the ADC of general precision just can sample to sampled voltage corresponding to modulation voltage, need not to adopt high-precision ADC or increase discharge circuit, can realize the detection to the discharge current of portable power source.
Step S20, A-D converter obtains sampled voltage corresponding to modulation voltage;
Present embodiment can adopt simple filtering circuit that modulation voltage is converted to sample voltage value, and obtains this sampled voltage by the AD pin of the MCU of the ADC of general precision or low precision, thereby has overcome the requirement of high-precision adc, has avoided the increase of amplifying circuit.
Step S30 when microprocessor is judged sampled voltage less than the no-load voltage threshold value, carries out no-load protection and processes.
Because load-carrying regular picture range of current should be greater than the no-load voltage threshold value, therefore can adopt the no-load voltage threshold value that the lower limit of sampled voltage is monitored, the no-load voltage threshold value can be by default mode input microprocessor, or detect by no load test in advance, with detected value as the threshold value input microprocessor.
Present embodiment does not directly detect the magnitude of voltage of inspection leakage resistance, but adopt indirectly mode, the modulation voltage of the driving pulse width/frequency modulated terminal of the integrated chip that boosts is converted to sample voltage value to be detected, this modulation voltage can directly reflect the discharge current of the integrated chip that boosts, thereby overcome the requirement of high-precision adc, avoided the increase of amplifying circuit, only adopt the ADC of general precision or low precision can realize monitoring to discharge current, be conducive to simplify circuit, reduce hardware cost.
As shown in Figure 2, Fig. 2 is the process flow diagram of the second embodiment of portable power source discharge current detection method of the present invention.Present embodiment has increased the step of definite no-load voltage threshold value on basis embodiment illustrated in fig. 1.Also comprise before the step S10:
Step S41, the integrated chip that boosts obtains the unloaded modulation voltage of driving pulse width/frequency modulated terminal;
Step S42, A-D converter obtain no-load voltage corresponding to unloaded modulation voltage;
Step S43, microprocessor is defined as the no-load voltage threshold value with no-load voltage.
The same unloaded modulation voltage of driving pulse width/frequency modulated terminal acquisition in the situation of portable power source zero load that adopts the integrated chip that boosts of present embodiment, and utilize simple filtering circuit can be converted into sample voltage value, and obtain this sampled voltage by the AD pin of the MCU of the ADC of general precision or low precision, as the no-load voltage threshold value.Because with consistent to the discharge current detection mode, therefore, no-load voltage threshold value herein more is applicable to the mentioned discharge current detection mode of the present invention to present embodiment to definite mode of no-load voltage threshold value, accuracy of detection effectively improves.
As shown in Figure 3, Fig. 3 is the process flow diagram of the 3rd embodiment of portable power source discharge current detection method of the present invention.Present embodiment has increased the step of the unloaded number of times of accumulative total on basis embodiment illustrated in fig. 1.Step S30 specifically comprises:
Step S31, when microprocessor was judged sampled voltage less than the no-load voltage threshold value, the accumulative total sampled voltage was less than the number of times of no-load voltage threshold value;
Step S32 judges sampled voltage when microprocessor and, carries out no-load protection and process during greater than unloaded frequency threshold value less than the number of times of no-load voltage threshold value.
Present embodiment adds up unloaded number of times, when the unloaded number of times of accumulative total during greater than unloaded frequency threshold value, just formally is defined as unloaded situation and occurs, and the line space of going forward side by side is carried conservation treatment, has effectively avoided detection error or false alarm.
As shown in Figure 4, Fig. 4 is the structural representation of portable power source discharge current detection system of the present invention.The portable power source discharge current detection system that present embodiment is mentioned comprises:
The integrated chip 10 that boosts, the modulation voltage of the driving pulse width/frequency modulated terminal of the integrated chip 10 that is used for obtaining boosting;
A-D converter 20 is used for obtaining sampled voltage corresponding to modulation voltage;
In the present embodiment, the driving pulse width/frequency modulated terminal of integrated chip 10 is when zero load and when load is arranged owing to boost, modulation voltage on the driving pulse width/frequency modulated terminal changes quite obvious, can directly reflect the discharge current of the integrated chip 10 that boosts, there is corresponding relation in the discharge current that is modulation voltage and the integrated chip 10 that boosts, utilize the MCU of the ADC 20 of general precision just can directly detect sampled voltage corresponding to modulation voltage, need not to adopt high-precision ADC 20 or increase discharge circuit, can realize the detection to the discharge current of portable power source.Present embodiment can adopt simple filtering circuit that modulation voltage is converted to sample voltage value, and obtain this sampled voltage by the AD pin of the MCU of the ADC 20 of general precision or low precision, thereby overcome the requirement of high-precision adc 20, avoided the increase of amplifying circuit.Because load-carrying regular picture range of current should be greater than the no-load voltage threshold value, therefore can adopt the no-load voltage threshold value that the lower limit of sampled voltage is monitored, the no-load voltage threshold value can be by default mode input microprocessor 30, or detect by no load test in advance, with detected value as threshold value input microprocessor 30.Present embodiment does not directly detect the magnitude of voltage of inspection leakage resistance, but adopt indirectly mode, the modulation voltage of the driving pulse width/frequency modulated terminal of the integrated chip 10 that boosts is converted to sample voltage value to be detected, this modulation voltage can directly reflect the discharge current of the integrated chip that boosts, thereby overcome the requirement of high-precision adc 20, avoided the increase of amplifying circuit, only adopt the ADC 20 of general precision or low precision can realize monitoring to discharge current, be conducive to simplify circuit, reduce hardware cost.
In the embodiment of the invention, the integrated chip 10 that boosts specifically is used for, and obtains the unloaded modulation voltage of driving pulse width/frequency modulated terminal;
A-D converter 20 specifically is used for, and obtains no-load voltage corresponding to unloaded modulation voltage;
The same unloaded modulation voltage of driving pulse width/frequency modulated terminal acquisition in the situation of portable power source zero load that adopts the integrated chip 10 that boosts of present embodiment, and utilize simple filtering circuit can be converted into sample voltage value, and obtain this sample voltage value by the AD pin of the MCU of the ADC 20 of general precision or low precision, as the no-load voltage threshold value.Because with consistent to the discharge current detection mode, therefore, no-load voltage threshold value herein more is applicable to the mentioned discharge current detection mode of the present invention to present embodiment to definite mode of no-load voltage threshold value, accuracy of detection effectively improves.
In the embodiment of the invention, microprocessor 30 specifically is used for:
When judging sampled voltage less than the no-load voltage threshold value, the accumulative total sampled voltage is less than the number of times of no-load voltage threshold value;
When judging that sampled voltage, carries out no-load protection and processes during greater than unloaded frequency threshold value less than the number of times of no-load voltage threshold value.
Present embodiment adds up unloaded number of times, when the unloaded number of times of accumulative total during greater than unloaded frequency threshold value, just formally is defined as unloaded situation and occurs, and the line space of going forward side by side is carried conservation treatment, has effectively avoided detection error or false alarm.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (8)
1. a portable power source discharge current detection method is characterized in that, comprises step:
The integrated chip that boosts obtains the modulation voltage of the driving pulse width/frequency modulated terminal of the described integrated chip that boosts;
A-D converter obtains sampled voltage corresponding to described modulation voltage;
When microprocessor is judged described sampled voltage less than the no-load voltage threshold value, carry out no-load protection and process.
2. portable power source discharge current detection method according to claim 1 is characterized in that, also comprises before the step of the modulation voltage of the driving pulse width/frequency modulated terminal of the described described integrated chip that boosts of integrated chip acquisition that boosts:
The described integrated chip that boosts obtains the unloaded modulation voltage of described driving pulse width/frequency modulated terminal;
Described A-D converter obtains no-load voltage corresponding to described unloaded modulation voltage;
Described microprocessor is defined as the no-load voltage threshold value with described no-load voltage.
3. portable power source discharge current detection method according to claim 2 is characterized in that, and is described when microprocessor is judged described sampled voltage less than the no-load voltage threshold value, and the step of carrying out the no-load protection processing specifically comprises:
When described microprocessor was judged described sampled voltage less than the no-load voltage threshold value, the described sampled voltage of accumulative total was less than the number of times of no-load voltage threshold value;
Judging described sampled voltage when described microprocessor, carries out no-load protection and processes during greater than unloaded frequency threshold value less than the number of times of no-load voltage threshold value.
4. according to claim 1 to 3 each described portable power source discharge current detection methods, it is characterized in that described modulation voltage is corresponding with the discharge current of the described integrated chip that boosts.
5. a portable power source discharge current detection system is characterized in that, comprising:
The integrated chip that boosts is used for obtaining the modulation voltage of the driving pulse width/frequency modulated terminal of the described integrated chip that boosts;
A-D converter is used for obtaining sampled voltage corresponding to described modulation voltage;
Microprocessor is used for when judging described sampled voltage less than the no-load voltage threshold value, carries out no-load protection and processes.
6. portable power source discharge current detection system according to claim 5 is characterized in that, the described integrated chip that boosts specifically is used for, and obtains the unloaded modulation voltage of described driving pulse width/frequency modulated terminal;
Described analog to digital conversion implement body is used for, and obtains no-load voltage corresponding to described unloaded modulation voltage;
Described microprocessor specifically is used for, and described no-load voltage is defined as the no-load voltage threshold value.
7. portable power source discharge current detection system according to claim 6 is characterized in that described microprocessor specifically is used for:
When judging described sampled voltage less than the no-load voltage threshold value, the described sampled voltage of accumulative total is less than the number of times of no-load voltage threshold value;
When judging that described sampled voltage, carries out no-load protection and processes during greater than unloaded frequency threshold value less than the number of times of no-load voltage threshold value.
8. according to claim 5 to 7 each described portable power source discharge current detection systems, it is characterized in that described modulation voltage is corresponding with the discharge current of the described integrated chip that boosts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410051.2A CN102955067B (en) | 2012-10-24 | 2012-10-24 | Movable power supply discharging current detecting method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410051.2A CN102955067B (en) | 2012-10-24 | 2012-10-24 | Movable power supply discharging current detecting method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102955067A true CN102955067A (en) | 2013-03-06 |
| CN102955067B CN102955067B (en) | 2015-01-07 |
Family
ID=47764135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210410051.2A Active CN102955067B (en) | 2012-10-24 | 2012-10-24 | Movable power supply discharging current detecting method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102955067B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108122530A (en) * | 2016-11-28 | 2018-06-05 | 昆山国显光电有限公司 | The call method and display screen of power supply chip and its PWM, PFM |
| CN110137912A (en) * | 2019-05-30 | 2019-08-16 | 四川长虹电器股份有限公司 | BOOST booster circuit no-load protection methods |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294610A (en) * | 1994-04-27 | 1995-11-10 | Sanyo Electric Co Ltd | Circuit for detecting remaining capacity of secondary battery |
| JP2006204066A (en) * | 2005-01-24 | 2006-08-03 | Matsushita Electric Ind Co Ltd | Portable charger |
| CN2877108Y (en) * | 2006-01-14 | 2007-03-07 | 惠州市蓝微电子有限公司 | Back-up power managing device |
| CN200990517Y (en) * | 2006-12-29 | 2007-12-12 | 叶春 | Charger |
| CN201150007Y (en) * | 2008-01-26 | 2008-11-12 | 何志雄 | Mobile power supply |
| CN101930056A (en) * | 2009-06-24 | 2010-12-29 | 力博特公司 | Method for predicting power backup time of battery |
| US20120025766A1 (en) * | 2010-07-27 | 2012-02-02 | Ark Corporation Pty Ltd | Charging Apparatus and Portable Power Supply |
| CN102355019A (en) * | 2011-09-21 | 2012-02-15 | 东华大学 | Control method of solar clothes charging current and device |
| CN202250430U (en) * | 2011-08-31 | 2012-05-30 | 日立汽车部件（苏州）有限公司 | Electromagnetic load control device |
-
2012
- 2012-10-24 CN CN201210410051.2A patent/CN102955067B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294610A (en) * | 1994-04-27 | 1995-11-10 | Sanyo Electric Co Ltd | Circuit for detecting remaining capacity of secondary battery |
| JP2006204066A (en) * | 2005-01-24 | 2006-08-03 | Matsushita Electric Ind Co Ltd | Portable charger |
| CN2877108Y (en) * | 2006-01-14 | 2007-03-07 | 惠州市蓝微电子有限公司 | Back-up power managing device |
| CN200990517Y (en) * | 2006-12-29 | 2007-12-12 | 叶春 | Charger |
| CN201150007Y (en) * | 2008-01-26 | 2008-11-12 | 何志雄 | Mobile power supply |
| CN101930056A (en) * | 2009-06-24 | 2010-12-29 | 力博特公司 | Method for predicting power backup time of battery |
| US20120025766A1 (en) * | 2010-07-27 | 2012-02-02 | Ark Corporation Pty Ltd | Charging Apparatus and Portable Power Supply |
| CN202250430U (en) * | 2011-08-31 | 2012-05-30 | 日立汽车部件（苏州）有限公司 | Electromagnetic load control device |
| CN102355019A (en) * | 2011-09-21 | 2012-02-15 | 东华大学 | Control method of solar clothes charging current and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108122530A (en) * | 2016-11-28 | 2018-06-05 | 昆山国显光电有限公司 | The call method and display screen of power supply chip and its PWM, PFM |
| CN110137912A (en) * | 2019-05-30 | 2019-08-16 | 四川长虹电器股份有限公司 | BOOST booster circuit no-load protection methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102955067B (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180150157A1 (en) | Capacitance variation detection circuit, touch screen and touch detection method | |
| US10831321B2 (en) | Parallel sensing touch control device and operating method thereof | |
| KR101043445B1 (en) | Insulation resistance measurement circuit using resistance connected with battery | |
| TW200710406A (en) | Leakage current detection apparatus and leakage current detection method | |
| CN209992574U (en) | Electric automobile insulation resistance detection circuitry | |
| CN110690815A (en) | Mixed mode boost power factor correction converter | |
| CN102955067B (en) | Movable power supply discharging current detecting method and system | |
| CN106510755A (en) | Method of ultrasonic medical apparatus to detect received signals | |
| CN102043084A (en) | Method for detecting resistive current of lightning arrester | |
| CN104502115A (en) | High precision detector | |
| CN102564636A (en) | Method utilizing general IO port of baseband chip to measure temperature of cell phone battery | |
| CN109298033B (en) | Electrochemical gas sensor and diagnosis method thereof | |
| CN204136868U (en) | Grip gear detection device | |
| CN103954828A (en) | Voltage detection circuit and device based on single-phase PFC | |
| CN206710501U (en) | A kind of two-way load sense circuitry for square-wave generator | |
| CN104597316A (en) | Weak current detecting device and method | |
| CN204346584U (en) | Light change-over switch input wide region optical power detection apparatus | |
| CN204462242U (en) | Weak current signal detection device | |
| CN211554028U (en) | Signal filtering device and blood coagulation analyzer | |
| CN204086191U (en) | Humidity measuring circuit | |
| CN108226621A (en) | A kind of high-precision peak-to-valley value sample circuit | |
| CN102495274B (en) | Current acquisition circuit for electric automobile power batteries | |
| CN105548666A (en) | Electric automobile charging current calculation method free from sampling resistor | |
| TW202023200A (en) | Frequency detector | |
| CN213722001U (en) | Human stress response detecting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 758, 7th Floor, Block A and B, Xinghua Building, No. 2018 Shennan Middle Road, Fuqiang Community, Huaqiang North Street, Futian District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Peicheng Electronic Technology Co.,Ltd. Address before: 518000, 3rd floor, Building B, Tsinghua Ziguang Information Port, North District, Science and Technology Park, Nanshan District, Shenzhen, Guangdong Province Patentee before: SHENZHEN PACE ELECTRONIC TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |