CN1983757A - Isolated DC power-supply system and method - Google Patents
Isolated DC power-supply system and method Download PDFInfo
- Publication number
- CN1983757A CN1983757A CN 200510120658 CN200510120658A CN1983757A CN 1983757 A CN1983757 A CN 1983757A CN 200510120658 CN200510120658 CN 200510120658 CN 200510120658 A CN200510120658 A CN 200510120658A CN 1983757 A CN1983757 A CN 1983757A
- Authority
- CN
- China
- Prior art keywords
- electricity accumulating
- power
- accumulating unit
- power supply
- 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
Images
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention is concerned with the isolating cocurrent power supply system and the method, the cocurrent power supply system includes: several power storage units, the testing and controlling circuit, and the cocurrent outputting end, the testing and controlling circuit tests the outputting voltage of several power storage units switch the connection between the cocurrent outputting end and several power storage units according to the prearrange threshold voltage. The invention can process physics isolation for the power adapter and the power electro-equipment by using the circuit structure, in order that the surge current of the power adapter can not enter the electro-equipment, and avoid the damage of the electro-equipment.
Description
[technical field]
The present invention relates to a kind of DC power-supply system and method, particularly a kind of DC power-supply system and method for utilizing electricity accumulating unit with power consumption equipment and power supply adaptor isolation.
[background technology]
Surge phenomenon in the various DC power-supply system is mainly produced by two kinds of reasons: external cause and inner reason.Wherein, external cause mainly comprises: directly hit the direct stroke of AC network or electric power system parts and hit near the earth and on AC network or electric power system parts, induce the indirect stroke of high current and voltage by electromagnetic induction.And inner reason mainly is the inside surge that produces owing to reasons such as equipment start-stop, line fault and switching actions, for example can produce bigger surge current in the power up of power supply adaptor.Surge current brings adverse effect to power consumption equipment.Bring fatal impact particularly can for microelectronic devices such as computer, communication and some precision instruments.
The main means that solve surge phenomenon in the circuit at present are to adopt to exchange overvoltage protector and direct current surge suppressor, promptly install the interchange overvoltage protector additional on the low-pressure side of AC transformer, zero on the ground of base station A.C. distribution box; Power input in DC load installs surge suppressor additional.Exchange overvoltage protector and mainly comprise gas discharge tube (GDT), Zener diode (Zener diode), metal oxide varistor (MOV) and transient voltage supression device (TVS pipe) etc.; the resistance of this class component can reduce rapidly with the rising of voltage, so that momentary excess current is shunted.
In order to reduce surge current, usually at suitable negative tempperature coefficient thermistor of series connection in circuit, its resistance value raises with temperature and diminishes, with inrush current limitation within the acceptable range in power supply adaptor.In addition, the parallel connection of can also in circuit, connect resistance and switch combination, switch disconnects when powering on, and resistance is connected to and plays metering function in the circuit, treats that surge current is later again with resistive short.
In said structure, power consumption equipment directly is connected with power supply adaptor, and when surge current can't suppress surge current fully than big or anti-surge circuit, the part surge current still can enter power consumption equipment, and the electronic equipment in it is caused damage.
[summary of the invention]
For the power consumption equipment that solves prior art directly is connected with power supply adaptor, when surge current can't suppress surge current fully than big or anti-surge circuit, the part surge current still can enter power consumption equipment the element in it is caused the technical problem of damage, the invention provides a kind of DC power-supply system and method for utilizing electricity accumulating unit that power consumption equipment and power supply adaptor are isolated.
The power consumption equipment that the present invention solves prior art directly is connected with power supply adaptor, when surge current can't suppress surge current fully than big or anti-surge circuit, the part surge current still can enter power consumption equipment and cause the technical scheme that technical problem adopted of damage to be to the element in it: a kind of DC power-supply system is provided, this DC power-supply system comprises a plurality of electricity accumulating units, detection and control circuit and dc output end wherein detect and control circuit detects the output voltage of a plurality of electricity accumulating units and switches being connected between dc output end and a plurality of electricity accumulating units according to predetermined threshold value voltage.
According to a preferred embodiment of the invention, first electricity accumulating unit in a plurality of electricity accumulating units is connected with dc output end, detection and control circuit detect the output voltage of first electricity accumulating unit, and when the output voltage of first electricity accumulating unit is lower than threshold voltage dc output end are connected on second electricity accumulating unit.
According to a preferred embodiment of the invention, detect and control circuit comprises: the detection chip that is used to detect the output voltage of a plurality of electricity accumulating units; Be used to switch first relay that is connected between dc output end and a plurality of electricity accumulating units; The control signal that is used to respond detection chip is controlled the single-chip microcomputer of first relay.
According to a preferred embodiment of the invention, the DC power-supply system system also comprises ac input end and the power supply adaptor that is connected with ac input end, and the electricity accumulating unit that detection and control circuit also are lower than output voltage threshold voltage is connected to power supply adaptor.
According to a preferred embodiment of the invention, DC power-supply system also comprises and is used for second relay that is connected between Switching power adapter and a plurality of electricity accumulating units.
According to a preferred embodiment of the invention, when the output voltage of a plurality of electricity accumulating units all was lower than threshold voltage, first relay and second relay were connected to dc output end with power supply adaptor.
The power consumption equipment that the present invention solves prior art directly is connected with power supply adaptor, when surge current can't suppress surge current fully than big or anti-surge circuit, the part surge current still can enter power consumption equipment and cause another technical scheme that technical problem adopted of damage to be to the element in it: a kind of isolated method of supplying power to is provided, and this method of supplying power to comprises: a. is connected to dc output end with first electricity accumulating unit; B. detect the output voltage of first electricity accumulating unit; C. when the output voltage of first electricity accumulating unit is lower than predetermined threshold value voltage, dc output end switched to second electricity accumulating unit is connected.
According to a preferred embodiment of the invention, step c: also comprise first electricity accumulating unit is connected with power supply adaptor.
According to a preferred embodiment of the invention, this method of supplying power to also comprises steps d: detect the output voltage of second electricity accumulating unit, and when the output voltage of second electricity accumulating unit is lower than threshold voltage, dc output end is switched to first electricity accumulating unit be connected.
According to a preferred embodiment of the invention, this method of supplying power to also comprises step e: when the output voltage of first electricity accumulating unit and second electricity accumulating unit all is lower than threshold voltage, dc output end switched to power supply adaptor is connected.
When adopting the foregoing circuit structure, can power supply adaptor and power consumption equipment be carried out physical isolation by electricity accumulating unit, make the surge current of power supply adaptor can't import power consumption equipment into, avoid power consumption equipment to damage.
[description of drawings]
Fig. 1 is the schematic block diagram of isolated DC power-supply system one embodiment of the present invention;
Fig. 2 is the circuit diagram of isolated DC power-supply system one embodiment of the present invention.
[embodiment]
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, Fig. 1 is the schematic block diagram of DC power-supply system one embodiment of the present invention.In isolated DC power-supply system 1 of the present invention, power supply adaptor will convert the direct current of predetermined voltage to after the alternating current of ac input end input is by step-down and rectification, and be that battery A and battery B carry out selectively power by switch S 1, S2.Between the output of power supply adaptor and switch S 1, S2, be connected with lightning protection components such as discharge tube and TVS pipe, to prevent because the surge current that thunderbolt produces damages battery.Wherein, a battery among battery A and the battery B is instrument or the power supply of other power consumption equipment.Detect and control circuit detects the output voltage of battery A and battery B, when the voltage of the battery of powering for power consumption equipment less than predetermined threshold value voltage V
0The time, detect and control circuit automatically switches to by another piece battery and powers, and simultaneously control switch S1 or switch S 2 connect power supply adaptors to voltage less than predetermined threshold value voltage V
0Battery charge.And the voltage of working as battery A and battery B all is lower than threshold voltage V
0The time, directly be the power consumption equipment power supply by power supply adaptor.
When adopting the foregoing circuit structure, by power supply adaptor is that electricity accumulating units such as a plurality of batteries charge, and by detecting and control circuit is the power consumption equipment power supply according to the different battery of the output voltage Selective Control of predetermined threshold value voltage and battery, thereby with power consumption equipment and power supply adaptor isolation, when surge current can't suppress surge current fully than big or anti-surge circuit, only can have influence on battery, and can not influence the power supply unit of back.
With reference to Fig. 2, Fig. 2 is the circuit diagram of isolated DC power-supply system one embodiment of the present invention.In the present embodiment, power supply adaptor (not shown) provides the direct current of 12.6V through charger port J1.Charging input end mouth J1 is connected with resettable fuse, gas discharge tube (GDP) and transient voltage and restrains device (TVS pipe).Two lithium ion batteries (not shown) charge or power through battery port J2, J3 respectively.Being connected between relay K 1 control battery port J2, J3 and the charger port J1, relay K 2 is controlled battery port J2, J3 and is connected with dc output end mouth J4's.The course of work of this DC power-supply system is as follows: for example, during initial state, relay K 2 is connected battery port J2 with dc output end mouth J4, the battery that is connected by battery port J2 is the power consumption equipment power supply that dc output end mouth J4 is connected, and relay K 1 is connected battery port J3 with charging input end mouth J1, is the battery charge that battery port J3 is connected by power supply adaptor.Chip 12F675 detects dc output end mouth J4 both end voltage, that is, and and the output voltage of the battery that battery port J2 connected.When the output voltage that detects is lower than threshold voltage 9V, chip 12F675 sends control signal to single-chip microcomputer, and by single-chip microcomputer by triode Q2 control relay K2 adhesive, connect battery port J3 and dc output end mouth J4, the battery that is connected by battery port J3 is the power consumption equipment power supply that dc output end mouth J4 is connected.Single-chip microcomputer connects battery port J2 and is connected with charging input end mouth J1 by triode Q1 control relay K1 adhesive simultaneously, is the battery charge that battery port J2 is connected by power supply adaptor.If the output voltage of the battery that battery port J2, J3 connected all is lower than threshold voltage 9V, then the monolithic single-chip microcomputer is a powered battery by control relay K1, K2, connect charging input end mouth J1 and dc output end mouth J4 simultaneously, directly be the power consumption equipment power supply by power supply adaptor.During power supply, indicator light L4 is bright, and during battery port J2 power supply, indicator light L2 is bright, and during battery port J3 power supply, indicator light L3 is bright, and during the power supply adaptor power supply, indicator light L1 is bright.
In the above-described embodiments; be embodiment only with two electricity accumulating units and relay; the present invention has been carried out exemplary description, but those skilled in the art can design various execution modes according to different actual needs under the situation of the scope and spirit that do not break away from the present invention and protected.For example, a plurality of electricity accumulating units are set in electric power system or utilize other electric-controlled switch such as controllable silicon to replace relay, and can design the circuit diagram of other type thus.
Claims (10)
1. DC power-supply system, it is characterized in that: described DC power-supply system comprises a plurality of electricity accumulating units, detection and control circuit and dc output end, and wherein said detection and control circuit detect the output voltage of described a plurality of electricity accumulating units and switch being connected between described dc output end and the described a plurality of electricity accumulating units according to predetermined threshold value voltage.
2. electric power system according to claim 1, it is characterized in that: first electricity accumulating unit in described a plurality of electricity accumulating units is connected with described dc output end, described detection and control circuit detect the output voltage of described first electricity accumulating unit, and when the output voltage of described first electricity accumulating unit is lower than described threshold voltage described dc output end are connected on second electricity accumulating unit.
3. electric power system according to claim 1 and 2 is characterized in that: described detection and control circuit comprise: the detection chip that is used to detect the output voltage of described a plurality of electricity accumulating units; Be used to switch first relay that is connected between described dc output end and the described a plurality of electricity accumulating units; The control signal that is used to respond described detection chip is controlled the single-chip microcomputer of described first relay.
4. electric power system according to claim 3, it is characterized in that: described DC power-supply system system also comprises ac input end and the power supply adaptor that is connected with described ac input end, and the electricity accumulating unit that described detection and control circuit also are lower than output voltage described threshold voltage is connected to described power supply adaptor.
5. electric power system according to claim 4 is characterized in that: described DC power-supply system also comprises and is used to switch second relay that is connected between described power supply adaptor and the described a plurality of electricity accumulating units.
6. electric power system according to claim 5 is characterized in that: when the output voltage of described a plurality of electricity accumulating units all was lower than described threshold voltage, described first relay and described second relay were connected to described dc output end with described power supply adaptor.
7. isolated method of supplying power to, described method of supplying power to comprises:
A. first electricity accumulating unit is connected to dc output end;
B. detect the output voltage of described first electricity accumulating unit;
C. when the output voltage of described first electricity accumulating unit is lower than predetermined threshold value voltage, described dc output end switched to second electricity accumulating unit is connected.
8. method of supplying power to according to claim 7 is characterized in that: described step c: also comprise described first electricity accumulating unit is connected with power supply adaptor.
9. according to claim 7 or 8 any described method of supplying power to, it is characterized in that: described method of supplying power to also comprises steps d: the output voltage that detects described second electricity accumulating unit, and when the output voltage of described second electricity accumulating unit is lower than described threshold voltage, described dc output end switched to described first electricity accumulating unit is connected.
10. method of supplying power to according to claim 9, it is characterized in that: described method of supplying power to also comprises step e: when the output voltage of described first electricity accumulating unit and described second electricity accumulating unit all is lower than described threshold voltage, described dc output end switched to described power supply adaptor is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510120658 CN1983757A (en) | 2005-12-16 | 2005-12-16 | Isolated DC power-supply system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510120658 CN1983757A (en) | 2005-12-16 | 2005-12-16 | Isolated DC power-supply system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1983757A true CN1983757A (en) | 2007-06-20 |
Family
ID=38166079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510120658 Pending CN1983757A (en) | 2005-12-16 | 2005-12-16 | Isolated DC power-supply system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1983757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305378A (en) * | 2011-05-03 | 2012-01-04 | 沈华耿 | Solar fire-fighting emergency lamp |
-
2005
- 2005-12-16 CN CN 200510120658 patent/CN1983757A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305378A (en) * | 2011-05-03 | 2012-01-04 | 沈华耿 | Solar fire-fighting emergency lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101174770B (en) | Charging protection device | |
| CN102369644B (en) | Control circuit for preventing battery group from being reversely connected and power supply system for base station | |
| KR20090004525A (en) | Over-voltage protected battery charger with bypass | |
| CN205665378U (en) | Relay adhesion detection circuitry | |
| CN103580261A (en) | Control system, power supply system and method for avoiding battery float charge | |
| CN101127608A (en) | Wireless network adapter over current protection method and device | |
| CN102608371B (en) | Storage battery detecting device and undervoltage protection method thereof | |
| CN204407870U (en) | A kind of secondary battery protection circuit | |
| CN106026224A (en) | Power control device | |
| CN205847076U (en) | AC D/C power | |
| CN103187712B (en) | Battery charge and discharge protection circuit | |
| CN201937311U (en) | Full-automatic uniterruptable power output (UPS) | |
| CN2899229Y (en) | Isolated DC supply system | |
| CN207398829U (en) | A kind of intelligent power system based on DSP | |
| CN106019170A (en) | Power adapter detecting device | |
| CN1983757A (en) | Isolated DC power-supply system and method | |
| CN110034595A (en) | A kind of backup battery managing device and mobile unit | |
| CN202394174U (en) | System and abnormal power failure protection device thereof | |
| CN205960779U (en) | P type monitoring formula switching power | |
| CN105098705B (en) | A kind of earth leakage protective device | |
| CN205753634U (en) | There is the automatic switchover double-purpose source of monitoring | |
| CN209250301U (en) | A kind of battery charge/discharge protection circuit | |
| CN201490709U (en) | Anti-dead halt lightning arrester | |
| EP3163713B1 (en) | Uninterruptible electric power system | |
| CN203368086U (en) | Battery charging device and mobile device employing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20070620 |