CN109120052B - Power supply system of data acquisition equipment - Google Patents
Power supply system of data acquisition equipment Download PDFInfo
- Publication number
- CN109120052B CN109120052B CN201811204687.5A CN201811204687A CN109120052B CN 109120052 B CN109120052 B CN 109120052B CN 201811204687 A CN201811204687 A CN 201811204687A CN 109120052 B CN109120052 B CN 109120052B
- Authority
- CN
- China
- Prior art keywords
- super capacitor
- capacitor
- resistor
- electrode
- data acquisition
- 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.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 146
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 30
- 239000004230 Fast Yellow AB Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims 10
- 238000013500 data storage Methods 0.000 abstract 1
- 239000004231 Riboflavin-5-Sodium Phosphate Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a power supply system of data acquisition equipment, which comprises a mains supply connection port, wherein the mains supply connection port is used for externally connecting with mains supply and supplying power to the data acquisition equipment; the super capacitor also comprises a super capacitor control circuit and a super capacitor protection circuit which are connected with the super capacitor; the super capacitor is used for supplying power to the data acquisition equipment, and the data acquisition equipment can also charge the super capacitor. The super capacitor is adopted to provide power for the data acquisition equipment under the condition of sudden power failure, so that the data acquisition equipment can finish data storage, and data loss is prevented. The invention is suitable for the field of data acquisition equipment.
Description
Technical Field
The invention relates to the field of data acquisition equipment, in particular to a power supply system of the data acquisition equipment.
Background
With the progress of technology and technology, the requirements of statistics and analysis of information are higher and higher due to the development of technology and the increase of business requirements. Stability and integrity of data acquisition in the big data information age are one of the crucial factors. To ensure the integrity of information acquisition, firstly, the data acquisition equipment can be ensured to normally operate, and the continuous power is to ensure the stable operation of the acquisition equipment in advance. The power of the existing data acquisition equipment is generally supplied by mains supply;
the power supply mode still has the defect that the data acquired by the data acquisition equipment cannot be acquired, reported and stored in time under the condition of power failure emergency. The acquired data is lost, and the later data analysis and the like are inconvenient.
Disclosure of Invention
The invention provides a power supply system of data acquisition equipment, which aims to solve the problem that the data acquisition equipment can not save data in time when suffering from sudden power failure.
In order to achieve the above purpose of the present invention, the following technical scheme is adopted: the utility model provides a power supply system of data acquisition equipment, includes the commercial power connection port, the commercial power connection port is used for external commercial power, is used for supplying power for data acquisition equipment; the super capacitor also comprises a super capacitor control circuit and a super capacitor protection circuit which are connected with the super capacitor; the super capacitor is used for supplying power to the data acquisition equipment, and the data acquisition equipment can also charge the super capacitor.
Preferably, the super capacitor control circuit comprises a CMOS tube Q13, a resistor R138, a capacitor C71, a resistor R146, an NPN triode Q15, a resistor R150 and a resistor R148;
the source electrode of the CMOS tube Q13 is connected with the positive electrode of the super capacitor, the drain electrode of the CMOS tube Q13 is connected with the main control board of the data acquisition equipment, and the grid electrode of the CMOS tube Q13 is connected with the collector electrode of the NPN triode Q15 through a resistor R146;
the resistor R138 is connected in parallel with two ends of the source electrode and the grid electrode of the CMOS tube Q13;
one end of the capacitor C71 is connected with the drain electrode of the CMOS transistor Q13, and the other end is connected with the emitter electrode of the NPN triode Q15;
the emitter of the NPN triode Q15 is grounded, and the resistor R150 is connected in parallel with the two ends of the base and the emitter of the NPN triode Q15;
the base of NPN triode Q15 is used for being connected with main control module through resistance R148.
Preferably, the supercapacitor protection circuit includes a supercapacitor protection chip U102, a supercapacitor protection chip U103, a resistor R102, a resistor R105, a resistor R104, a resistor R106, a capacitor E105, a capacitor E106, a diode D101, a capacitor C49, a capacitor C58, a DCDC module, a capacitor E4, a thermistor RT1, a diode D19, a diode D21, a capacitor C57, and a capacitor C55;
the IOUT pin and the GND pin of the super capacitor protection chip U103 are connected with a resistor R105 in parallel, the GND pin is grounded, the SEL pin of the super capacitor protection chip U103 is connected with the positive electrode of a capacitor E106 through a resistor R106, and the VDD pin of the super capacitor protection chip U103 is connected with the positive electrode of the capacitor E106; the negative electrode of the capacitor E106 is grounded;
the IOUT pin and the GND pin of the super capacitor protection chip U102 are connected with a resistor R102 in parallel, the SEL pin of the super capacitor protection chip U102 is connected with the positive electrode of a capacitor E105 through a resistor R104, and the VDD pin of the super capacitor protection chip U102 is connected with the positive electrode of the capacitor E105;
the anode of the capacitor E106 is connected with the cathode of the capacitor E105, and the GND pin of the super-capacitor protection chip U102 is connected between the capacitor E105 and the capacitor E106;
the anode of the capacitor E105 is connected with the anode of the diode D101 and discharges through the diodes D101 to 5V;
the positive electrode of the capacitor E105 is connected with the positive input end of the DCDC module, the positive input end and the negative input end of the DCDC module are connected with the capacitor C49 and the capacitor C58 in parallel, and the negative input end of the DCDC module is grounded;
a capacitor E4 is connected in parallel between the positive output end and the negative output end of the DCDC module; the positive output end of the DCDC module is connected with a thermistor RT1 and a diode D19 to charge a super capacitor;
the positive output end of the DCDC module is also connected with 5V through a diode D21;
the negative electrode of the diode D21 and the negative output end of the DCDC module are simultaneously connected with a capacitor C57 and a capacitor C55 in parallel;
and meanwhile, the negative output end of the DCDC module is grounded.
The beneficial effects of the invention are as follows: the super capacitor is protected by the super capacitor protection chip and the protection circuit, so that the super capacitor is prevented from breakdown caused by overvoltage; the super capacitor is used for storing a small amount of electric quantity, and when sudden power failure occurs, the data acquisition system can be guaranteed to be powered off, data can be stored in time, and data loss is effectively prevented.
Drawings
Fig. 1 is a system frame diagram of a power supply system of the data acquisition device of the present invention.
Fig. 2 is a circuit diagram of a portion of the supercapacitor protection circuit of the present invention.
Fig. 3 is a circuit diagram and control circuit diagram of a portion of the super protection circuit of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
Example 1
As shown in fig. 1, a power supply system of a data acquisition device includes a mains connection port, where the mains connection port is used for externally connecting with mains and supplying power to the data acquisition device; the super capacitor also comprises a super capacitor control circuit and a super capacitor protection circuit which are connected with the super capacitor; the super capacitor is used for supplying power to the data acquisition equipment, and the data acquisition equipment can also charge the super capacitor.
As shown in fig. 2 and 3, the super capacitor control circuit includes a CMOS transistor Q13, a resistor R138, a capacitor C71, a resistor R146, an NPN triode Q15, a resistor R150, and a resistor R148; the CMOS transistor Q13 adopts a WPM3407 model, and the NPN triode Q15 adopts an MMBT39047 model.
The source electrode of the CMOS tube Q13 is connected with the positive electrode of the super capacitor, the drain electrode of the CMOS tube Q13 is connected with the main control board of the data acquisition equipment, and the grid electrode of the CMOS tube Q13 is connected with the collector electrode of the NPN triode Q15 through a resistor R146;
the resistor R138 is connected in parallel with two ends of the source electrode and the grid electrode of the CMOS tube Q13;
one end of the capacitor C71 is connected with the drain electrode of the CMOS transistor Q13, and the other end is connected with the emitter electrode of the NPN triode Q15;
the emitter of the NPN triode Q15 is grounded, and the resistor R150 is connected in parallel with the two ends of the base and the emitter of the NPN triode Q15;
the base of NPN triode Q15 is used for being connected with main control module through resistance R148.
As shown in fig. 3, the supercapacitor protection circuit includes a supercapacitor protection chip U102, a supercapacitor protection chip U103, a resistor R102, a resistor R105, a resistor R104, a resistor R106, a capacitor E105, a capacitor E106, a diode D101, a capacitor C49, a capacitor C58, a DCDC module, a capacitor E4, a thermistor RT1, a diode D19, a diode D21, a capacitor C57, and a capacitor C55; the super capacitor protection chip U103 adopts BW6101 model.
The IOUT pin and the GND pin of the super capacitor protection chip U103 are connected with a resistor R105 in parallel, the GND pin is grounded, the SEL pin of the super capacitor protection chip U103 is connected with the positive electrode of a capacitor E106 through a resistor R106, and the VDD pin of the super capacitor protection chip U103 is connected with the positive electrode of the capacitor E106; the negative electrode of the capacitor E106 is grounded;
the IOUT pin and the GND pin of the super capacitor protection chip U102 are connected with a resistor R102 in parallel, the SEL pin of the super capacitor protection chip U102 is connected with the positive electrode of a capacitor E105 through a resistor R104, and the VDD pin of the super capacitor protection chip U102 is connected with the positive electrode of the capacitor E105;
the anode of the capacitor E106 is connected with the cathode of the capacitor E105, and the GND pin of the super-capacitor protection chip U102 is connected between the capacitor E105 and the capacitor E106;
the anode of the capacitor E105 is connected with the anode of the diode D101 and discharges through the diodes D101 to 5V; here 5V is supplied, the discharge being controlled by Q13.
The positive electrode of the capacitor E105 is connected with the positive input end of the DCDC module, the positive input end and the negative input end of the DCDC module are connected with the capacitor C49 and the capacitor C58 in parallel, and the negative input end of the DCDC module is grounded;
a capacitor E4 is connected in parallel between the positive output end and the negative output end of the DCDC module; the positive output end of the DCDC module is connected with a thermistor RT1 and a diode D19 to charge a super capacitor;
the positive output end of the DCDC module is also connected with 5V through a diode D21; the battery or solar energy is output to the 5V power supply through the DCDC module, and the purpose of adding D21 is to protect the DCDC chip (avoid damaging the DCDC chip when 5V load is wrong)
The negative electrode of the diode D21 and the negative output end of the DCDC module are simultaneously connected with a capacitor C57 and a capacitor C55 in parallel;
and meanwhile, the negative output end of the DCDC module is grounded.
The super capacitor protection chip U102 and the super capacitor protection chip U103 can carry out single overvoltage protection on the super capacitor, so that safe charging can be ensured in the process of charging the super capacitor, the super capacitor cannot be broken down, dangers are caused, and the like.
A. Charging description:
1) The output of the system DC-DC power supply is 5.3V, and the super capacitor V3F is charged through RT1 (current limiting) and D19 in the conventional case;
2) After the system is started, the main control module outputs high level and then rapidly charges from the 5V end through the CMOS tube Q13;
B. when the input is powered down, the capacitor discharges:
1) The main control module outputs a high-level state, and the super capacitor V3F supplies power to 5V through the CMOS tube Q13;
2) Under the condition of system power failure, after finishing data processing, setting a low level for the main control module, and stopping discharging 5V by the super capacitor V3F; namely: at this time, the system is completely powered off;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (1)
1. The utility model provides a power supply system of data acquisition equipment, includes the commercial power connection port, the commercial power connection port is used for external commercial power, is used for supplying power for data acquisition equipment; the method is characterized in that: the super capacitor also comprises a super capacitor control circuit and a super capacitor protection circuit which are connected with the super capacitor; the super capacitor is used for supplying power to the data acquisition equipment, and the data acquisition equipment charges the super capacitor;
the super capacitor control circuit comprises a CMOS tube Q13, a resistor R138, a capacitor C71, a resistor R146, an NPN triode Q15, a resistor R150 and a resistor R148;
the source electrode of the CMOS tube Q13 is connected with the positive electrode of the super capacitor, the drain electrode of the CMOS tube Q13 is connected with the main control board of the data acquisition equipment, and the grid electrode of the CMOS tube Q13 is connected with the collector electrode of the NPN triode Q15 through a resistor R146;
the resistor R138 is connected in parallel with two ends of the source electrode and the grid electrode of the CMOS tube Q13;
one end of the capacitor C71 is connected with the drain electrode of the CMOS transistor Q13, and the other end is connected with the emitter electrode of the NPN triode Q15;
the emitter of the NPN triode Q15 is grounded, and the resistor R150 is connected in parallel with the two ends of the base and the emitter of the NPN triode Q15;
the base electrode of the NPN triode Q15 is connected with a main control board through a resistor R148;
the super capacitor protection circuit comprises a super capacitor protection chip U102, a super capacitor protection chip U103, a resistor R102, a resistor R105, a resistor R104, a resistor R106, a super capacitor monomer E105, a super capacitor monomer E1056, a diode D101, a capacitor C49, a capacitor C58, a DCDC module, a capacitor E4, a thermistor RT1, a diode D19, a diode D21, a capacitor C57 and a capacitor C55;
the IOUT pin and the GND pin of the super capacitor protection chip U103 are connected with a resistor R105 in parallel, the GND pin is grounded, the SEL pin of the super capacitor protection chip U103 is connected with the positive electrode of the super capacitor monomer E1056 through a resistor R106, and the VDD pin of the super capacitor protection chip U103 is connected with the positive electrode of the super capacitor monomer E1056; the negative electrode of the super capacitor monomer E1056 is grounded;
the IOUT pin and the GND pin of the super capacitor protection chip U102 are connected with a resistor R102 in parallel, the SEL pin of the super capacitor protection chip U102 is connected with the anode of the super capacitor E105 through a resistor R104, and the VDD pin of the super capacitor protection chip U102 is connected with the anode of the super capacitor E105;
the anode of the super capacitor monomer E1056 is connected with the cathode of the E105, and the GND pin of the super capacitor protection chip U102 is connected between the super capacitor monomer E105 and the super capacitor monomer E1056;
the positive electrode of the super capacitor monomer E105 is connected with the positive electrode of the diode D101, and 5V voltage is output through the diode D101;
the positive electrode of the super capacitor monomer E105 is connected with the positive input end of the DCDC module, the positive input end and the negative input end of the DCDC module are connected with a capacitor C49 and a capacitor C58 in parallel, and the negative input end of the DCDC module is grounded;
a capacitor E4 is connected in parallel between the positive output end and the negative output end of the DCDC module; the positive output end of the DCDC module is connected with a thermistor RT1 and a diode D19 to charge a super capacitor;
the positive output end of the DCDC module is also connected with a 5V power supply through a diode D21;
the negative electrode of the diode D21 and the negative output end of the DCDC module are simultaneously connected with a capacitor C57 and a capacitor C55 in parallel;
and meanwhile, the negative output end of the DCDC module is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811204687.5A CN109120052B (en) | 2018-10-16 | 2018-10-16 | Power supply system of data acquisition equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811204687.5A CN109120052B (en) | 2018-10-16 | 2018-10-16 | Power supply system of data acquisition equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109120052A CN109120052A (en) | 2019-01-01 |
| CN109120052B true CN109120052B (en) | 2024-01-23 |
Family
ID=64854785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811204687.5A Active CN109120052B (en) | 2018-10-16 | 2018-10-16 | Power supply system of data acquisition equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109120052B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006081613A1 (en) * | 2005-02-02 | 2006-08-10 | Cap-Xx Limited | A power supply |
| CN103501031A (en) * | 2013-10-09 | 2014-01-08 | 山东康威通信技术股份有限公司 | Super capacitor charging control circuit |
| CN104578366A (en) * | 2015-01-04 | 2015-04-29 | 国家电网公司 | Self-powered super capacitor energy-storage power source for detecting line faults |
| CN204886263U (en) * | 2015-07-21 | 2015-12-16 | 深圳市麦格米特控制技术有限公司 | Super capacitor control circuit that discharges |
| CN106965761A (en) * | 2016-01-13 | 2017-07-21 | 厦门雅迅网络股份有限公司 | A kind of mobile unit system cut-off protection device |
| CN206475763U (en) * | 2017-01-09 | 2017-09-08 | 深圳市深泰明科技有限公司 | A kind of power circuit and charging pile control system with super capacitor energy-storage circuit |
| CN207410057U (en) * | 2017-09-28 | 2018-05-25 | 宁波三星医疗电气股份有限公司 | Super capacitor charging circuit |
| CN207603282U (en) * | 2017-12-28 | 2018-07-10 | 深圳市铂盛科技有限公司 | A kind of safe industrial power supply management module |
| CN108418287A (en) * | 2018-05-19 | 2018-08-17 | 北京合众汇能科技有限公司 | A kind of FTU distribution terminals super capacitor backup power system |
| CN207782478U (en) * | 2018-02-07 | 2018-08-28 | 北京优盛智控科技有限公司 | The power supply of charging pile control system |
| CN208835817U (en) * | 2018-10-16 | 2019-05-07 | 广东电网有限责任公司 | A kind of powersupply system of data acquisition equipment |
-
2018
- 2018-10-16 CN CN201811204687.5A patent/CN109120052B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006081613A1 (en) * | 2005-02-02 | 2006-08-10 | Cap-Xx Limited | A power supply |
| CN103501031A (en) * | 2013-10-09 | 2014-01-08 | 山东康威通信技术股份有限公司 | Super capacitor charging control circuit |
| CN104578366A (en) * | 2015-01-04 | 2015-04-29 | 国家电网公司 | Self-powered super capacitor energy-storage power source for detecting line faults |
| CN204886263U (en) * | 2015-07-21 | 2015-12-16 | 深圳市麦格米特控制技术有限公司 | Super capacitor control circuit that discharges |
| CN106965761A (en) * | 2016-01-13 | 2017-07-21 | 厦门雅迅网络股份有限公司 | A kind of mobile unit system cut-off protection device |
| CN206475763U (en) * | 2017-01-09 | 2017-09-08 | 深圳市深泰明科技有限公司 | A kind of power circuit and charging pile control system with super capacitor energy-storage circuit |
| CN207410057U (en) * | 2017-09-28 | 2018-05-25 | 宁波三星医疗电气股份有限公司 | Super capacitor charging circuit |
| CN207603282U (en) * | 2017-12-28 | 2018-07-10 | 深圳市铂盛科技有限公司 | A kind of safe industrial power supply management module |
| CN207782478U (en) * | 2018-02-07 | 2018-08-28 | 北京优盛智控科技有限公司 | The power supply of charging pile control system |
| CN108418287A (en) * | 2018-05-19 | 2018-08-17 | 北京合众汇能科技有限公司 | A kind of FTU distribution terminals super capacitor backup power system |
| CN208835817U (en) * | 2018-10-16 | 2019-05-07 | 广东电网有限责任公司 | A kind of powersupply system of data acquisition equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109120052A (en) | 2019-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202712892U (en) | Battery management system and load detection circuit thereof | |
| CN102280924B (en) | Uninterrupted power supply system for relay protection device | |
| US11342764B2 (en) | Low voltage charging control and protection circuit for electronic cigarette and method of charging the electronic cigarette using the circuit | |
| CN103580272A (en) | Time-delay circuit for outage of power source | |
| CN103944250A (en) | Battery passivation preventing circuit of single-phase intelligent electric energy meter | |
| CN203788025U (en) | Storage battery charging and discharging management circuit | |
| CN208835817U (en) | A kind of powersupply system of data acquisition equipment | |
| CN109120052B (en) | Power supply system of data acquisition equipment | |
| CN103683266A (en) | Rechargeable battery protection circuit | |
| CN111817696B (en) | Delay shutdown circuit and delay shutdown control method | |
| CN203522224U (en) | Portable quick charging power supply using super-capacitor | |
| CN105223516A (en) | A kind of electric quantity of lithium battery analog voltage output unit | |
| KR102189479B1 (en) | A power supply apparatus | |
| CN203933057U (en) | A kind of portable multi-function portable power source | |
| CN111525542B (en) | Power supply method for safely storing data of intelligent electric energy meter | |
| CN203607846U (en) | Rechargeable battery protection circuit | |
| CN105576968A (en) | DC power source having wide input voltage range | |
| CN205039513U (en) | High -power circuit protector against power failure of high efficiency | |
| CN209982126U (en) | Low-power consumption power supply charging management circuit | |
| CN203103993U (en) | Vehicle power supply management system | |
| CN103683394A (en) | Charge protection circuit for storage battery | |
| CN211981564U (en) | Power-off data protection device of intelligent electric energy meter | |
| CN202503331U (en) | Circuit and battery for reducing self-consumption of battery management chip | |
| CN208062858U (en) | A kind of electric power management circuit for hand-held equipment | |
| CN211790940U (en) | Voltage-monitorable super capacitor standby circuit applied to electric power product |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |