CN104167783B - Dc source low ripple implementation method and circuit that a kind of battery last is powered - Google Patents
Dc source low ripple implementation method and circuit that a kind of battery last is powered Download PDFInfo
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- CN104167783B CN104167783B CN201410383814.8A CN201410383814A CN104167783B CN 104167783 B CN104167783 B CN 104167783B CN 201410383814 A CN201410383814 A CN 201410383814A CN 104167783 B CN104167783 B CN 104167783B
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Abstract
The dc source low ripple implementation method that a kind of battery last is powered, it is chargeable, the dc-battery of ripple-free after linear voltage regulator circuit by powering to the load, the dc-battery has two, only have a dc-battery in synchronization to be powered, and the dc-battery of power supply is in non-charged state, and another battery if electricity completely if be in stand-by state, otherwise it is in charged state, invention also provides realize circuit accordingly, including charging circuit, charge selection circuit, control circuit, first dc-battery, second dc-battery, power supply selection circuit and linear voltage regulator circuit, the present invention can thoroughly eliminate the intrinsic working frequency ripple wave of ac rectifier, realize the low ripple of DC output power, ensure the lasting electric energy supply of dc source.
Description
Technical field
The invention belongs to fine measuring instrument field, the occasion of ultralow ripple dc source is applied to, and in particular to
Dc source low ripple implementation method and circuit that a kind of battery last is powered.
Background technology
The free-revving engine that accuracy of measurement is signal measurement is improved, it is the important of raising accuracy of measurement to reduce all kinds of errors
Method, dc source ripple is to produce one of main contributor of signal errors.Dc source can be divided into two poles by its working frequency
Plumber's frequency rectifying voltage regulator and Switching Power Supply, are directly powered and industrial frequency rectifying power circuit using battery as shown in Figure 3, right
Two kinds of power supplys load normal resistance and carry out ripple analysis (nominal work for 45 Ω, 90 Ω, 180 Ω and 1800 Ω load respectively
It is respectively 200mA, 100mA, 50mA and 5mA as electric current), the ripple voltage waveform of two kinds of power supplys under different loads is drawn, is had
Body parameter is shown in Table 1.
The ripple that the battery of table 1 is directly powered from the different ohmic loads of industrial frequency rectifying power supply connection
From result, the ripple of the direct power supply of battery is substantially zero, and after the diode industrial frequency rectifying commonly used
Dc source have larger working frequency ripple wave, it is necessary to the filtering device of larger capacity；Switching Power Supply uses high-frequency work, wave filter
Part volume and capacity reduction, but still there is high frequency ripple and working frequency ripple wave, line can be reduced by increasing circuit filtering device
Ripple, but still do not reach the requirement of high-acruracy survey.
In the laboratory and workplace of the requirement of some high-acruracy surveys, it is desirable to obtain high-quality direct current power supply,
The directly power supply of dc-battery without ripple itself is a kind of preferably selection, but battery finite capacity, it is necessary to frequent charge.
Some power supplys are by the way of Alternating Current Power Supply, battery back up, it is ensured that the power supply after exchange dead electricity in a period of time, but normal shape
The ripple of Alternating Current Power Supply still has under state.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide the direct current that a kind of battery last is powered
Power supply low ripple implementation method and circuit, using two dc-batteries, a power supply and another charges, can be achieved lasting low
Ripple is powered.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of dc source low ripple implementation method that battery last is powered, chargeable, ripple-free dc-battery passes through
Powered to the load after linear voltage regulator circuit, the dc-battery there are two, only having a dc-battery in synchronization enters
Row power supply, and power supply dc-battery be in non-charged state, and another battery if electricity completely if be in stand-by state, it is no
Then it is in charged state.
If the electricity of two batteries be above power threshold value, select wherein the higher dc-battery of electricity power until
Less than power supply threshold value, select another dc-battery carry out charge until be full of, it is standby, if charging in dc-battery electricity
Not yet be full of and supplying cell already below power supply threshold value and meanwhile load need continue power, then stop charging, switching two
The charging state of dc-battery；
If the electricity of the electricity of a dc-battery another dc-battery higher than power supply threshold value is less than power supply threshold value,
Then the high dc-battery of selection electricity is powered until less than power supply threshold value, selecting another dc-battery charge until filling
It is full, standby, if the dc-battery electricity in charging is full of higher than power supply threshold value but not yet and supplying cell electricity is low
Loaded simultaneously in power supply threshold value needs to continue to power again, then stops charging, switch the charging state of two dc-batteries；
If the electricity of two dc-batteries is below threshold value of powering, sound and light alarm simultaneously stops after the power supply a period of time that is delayed
Only power, the low battery progress of selection wherein electricity, which charges to electricity, is expired, then to the charging of another battery until the battery electric quantity
It is full, just start again to load supplying in the case where two dc-battery electricity are full.
Circuit is realized invention also provides the dc source low ripple that a kind of battery last is powered, including：
Charging circuit, connects alternating current and provides rechargeable electrical energy for dc-battery；
Charge selection circuit, according to control circuit signal, by switch control charging circuit be the first dc-battery or
Second dc-battery charges；
The electricity of circuit, the first dc-battery of collection and the second dc-battery is controlled, wherein electricity is higher and is higher than for selection
Power supply threshold value person is that linear voltage regulator circuit is supplied power to less than power supply threshold value, and selection electricity junior carries out charging to electricity
It is full；
First dc-battery, electricity is more than power supply threshold value and the second dc-battery is supplied power to when being less than power supply threshold value, is line
Property voltage-regulating circuit is powered；
Second dc-battery, electricity is more than power supply threshold value and the first dc-battery is supplied power to when being less than power supply threshold value, is line
Property voltage-regulating circuit is powered；
Power supply selection circuit, according to the signal of control circuit, passes through and switchs the first dc-battery of control or the second direct current
Pond powers for linear voltage regulator circuit；
Linear voltage regulator circuit, it is load supplying after Serial regulation that battery powered DC voltage, which is carried out,.
First dc-battery and the second dc-battery are positive polarity output, and the charging selection circuit includes connecting
Meet the charge switch S1 and charge switch S3 in parallel of charging circuit output, charge switch S1 connection diodes D1 anode, two
Pole pipe D1 negative electrode connects the positive pole of the first dc-battery and power switch S2 one end, and power switch S2 another end connects two poles
Pipe D2 anode, the input and electrochemical capacitor C1 positive pole of diode D2 negative electrode connection linear voltage regulator circuit, electrolysis
Electric capacity C1 negative pole ground connection；The negative pole ground connection of first dc-battery；Charge switch S3 connection diodes D3 anode, diode D3
Negative electrode connect the positive pole of the second dc-battery and power switch S4 one end, power switch S4 another end connection diode D4's
Anode, the input and electrochemical capacitor C1 positive pole of diode D4 negative electrode connection linear voltage regulator circuit；Second direct current
The negative pole ground connection in pond；The control circuit obtains charged state by monitoring the electric current at charge switch S1 and charge switch S3,
And be that the first dc-battery or the second dc-battery charge by controlling charge switch S1 and charge switch S3 to open and close selection, pass through
Monitor the electric current at power switch S2 and power switch S4 and obtain power supply state, and by controlling power switch S2 and power switch
It is that the first dc-battery or the second dc-battery are powered that S4, which opens and closes selection,.
First dc-battery and the second dc-battery are negative polarity output, and the charging selection circuit includes connecting
Meet the charge switch S5 and charge switch S7 in parallel of charging circuit output, charge switch S5 connection diodes D5 negative electrode, two
Pole pipe D5 anode connects the negative pole of the first dc-battery and power switch S6 one end, and power switch S6 another end connects two poles
Pipe D6 negative electrode, the input and electrochemical capacitor C3 negative pole of diode D6 anode connection linear voltage regulator circuit, electrolysis
Electric capacity C3 plus earth；The plus earth of first dc-battery；Charge switch S7 connection diodes D7 negative electrode, diode D7
Anode connect the negative pole of the second dc-battery and power switch S8 one end, power switch S8 another end connection diode D8's
Negative electrode, the input and electrochemical capacitor C3 negative pole of diode D8 anode connection linear voltage regulator circuit；Second direct current
The plus earth in pond；The control circuit obtains charged state by monitoring the electric current at charge switch S5 and charge switch S7,
And be that the first dc-battery or the second dc-battery charge by controlling charge switch S5 and charge switch S7 to open and close selection, pass through
Monitor the electric current at power switch S6 and power switch S8 and obtain power supply state, and by controlling power switch S6 and power switch
It is that the first dc-battery or the second dc-battery are powered that S8, which opens and closes selection,.
First dc-battery and the second dc-battery are positive polarity battery, and the control circuit includes two poles of connection
The voltage collection circuit of pipe D1 anodes, connects the voltage collection circuit of diode D2 anodes, connects the voltage of diode D3 anodes
Acquisition Circuit, connects the voltage collection circuit of diode D4 anodes, connects the voltage collection circuit of the first dc-battery positive pole, even
The current collection circuit of the first dc-battery negative pole is connect, the voltage collection circuit of the second dc-battery positive pole, connection second is connected
The current collection circuit of dc-battery negative pole, Acquisition Circuit output connects two 2 input nor gates and four 3 inputs or non-respectively
Door, the output difference connecting valve S1 of four 3 input nor gates, switch S2, switch S3, the control end for switching S4.
First dc-battery and the second dc-battery are negative polarity battery, and the control circuit includes two poles of connection
The voltage collection circuit of pipe D5 negative electrodes, connects the voltage collection circuit of diode D6 negative electrodes, connects the voltage of diode D7 negative electrodes
Acquisition Circuit, connects the voltage collection circuit of diode D8 negative electrodes, connects the voltage collection circuit of the first dc-battery negative pole, even
The current collection circuit of the first dc-battery positive pole is connect, the voltage collection circuit of the second dc-battery negative pole, connection second is connected
The current collection circuit of dc-battery positive pole, Acquisition Circuit output connects two 2 input nor gates and four 3 inputs or non-respectively
Door, the output difference connecting valve S5 of four 3 input nor gates, switch S6, switch S7, the control end for switching S8.
First dc-battery and the second dc-battery are positive polarity output, and linear voltage regulator circuit includes connection
The LM78 chain of series voltage stabilizing chips that selection circuit of powering is exported, voltage stabilizing chip earth terminal ground connection, the connection of voltage stabilizing chip output end
Electrochemical capacitor C2 positive poles, electrochemical capacitor C2 negative poles ground connection.
First dc-battery and the second dc-battery are negative polarity output, and linear voltage regulator circuit includes connection
The LM79 chain of series voltage stabilizing chips that selection circuit of powering is exported, voltage stabilizing chip earth terminal ground connection, the connection of voltage stabilizing chip output end
Electrochemical capacitor C4 negative poles, electrochemical capacitor C4 plus earths.
Compared with prior art, the beneficial effects of the invention are as follows：
1) diode rectification power frequency supply is substituted using dc-battery, eliminates the input ripple of rear class voltage-regulating circuit；
Using linear voltage regulator circuit, the harmonic wave that reduction switch adjustment is produced；Above technical tie-up is used, it is ensured that realize whole circuit
Output low ripple.
2) powered selection circuit using incomplementarity, ensure the smooth output of the no-harass switch and electric energy between battery；Using non-
Complementation charging selection circuit, it is ensured that the lasting electric energy supply of late-class circuit.
3) charger, diode, battery, electrochemical capacitor and detection circuit use reversal to adapt to positive-negative polarity voltage
Output is required；Positive polarity and negative polarity power source combination get up the output low ripple of achievable bipolarity dc source.
Brief description of the drawings
Fig. 1 is the positive polarity dc source low ripple realization principle schematic diagram that battery last is powered.
Fig. 2 is the negative polarity d. c power supply low ripple realization principle schematic diagram that battery last is powered.
Fig. 3 is the ripple test circuit diagram of direct supplying cell and industrial frequency rectifying power supply.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
A kind of dc source low ripple implementation method that battery last is powered, chargeable, ripple-free dc-battery passes through
Powered to the load after linear voltage regulator circuit, dc-battery there are two, only having a dc-battery in synchronization is supplied
Electricity, and power supply dc-battery be in non-charged state, and another battery if electricity completely if be in stand-by state, otherwise locate
In charged state.That is, linear voltage regulator circuit of the industrial frequency rectifying voltage of exchange input not directly to rear class is powered, only to not
Under-voltage dc-battery charging in power supply state；Dc-battery that electricity is full of or in stand-by state, or to the electricity of rear class
Press adjustment circuit independently-powered；Any normal moment must have the sufficient dc-battery of an electric energy as the straight of voltage-regulating circuit
Stream input；By using the dc-battery of ripple-free itself as voltage-regulating circuit input, it is and linear using low harmony wave
Voltage-regulating circuit, to reduce the ripple that AC power frequency rectification or Switching Power Supply are brought；Simultaneously by AC power to it is under-voltage not
The dc-battery charging of power supply, provides lasting dc-battery for rear class voltage-regulating circuit and powers guarantee, realizes lasting low
Ripple is powered.
The present invention provides and realizes that the physical circuit of the above method includes：
Charging circuit, connects alternating current and provides rechargeable electrical energy for dc-battery；
First dc-battery, electricity is more than power supply threshold value and the second dc-battery is supplied power to when being less than power supply threshold value, is line
Property voltage-regulating circuit is powered；
Second dc-battery, electricity is more than power supply threshold value and the first dc-battery is supplied power to when being less than power supply threshold value, is line
Property voltage-regulating circuit is powered；
Linear voltage regulator circuit, it is load supplying after Serial regulation that battery powered DC voltage, which is carried out,.
Charge selection circuit, according to control circuit signal, by switch control charging circuit be the first dc-battery or
Second dc-battery charges；Power selection circuit, according to the signal of control circuit, by switching the first dc-battery of control or the
Two dc-batteries are powered for linear voltage regulator circuit；Charge selection circuit and power supply selection circuit composition prime direct current energy guarantor
Hindering circuit, there is provided the lasting, DC voltage without working frequency ripple wave.
The electricity of circuit, the first dc-battery of collection and the second dc-battery is controlled, wherein electricity is higher and is higher than for selection
Power supply threshold value person is that linear voltage regulator circuit is supplied power to less than power supply threshold value, and selection electricity junior carries out charging to electricity
It is full.Specific strategy is as follows：
If the electricity of two batteries be above power threshold value, select wherein the higher dc-battery of electricity power until
Less than power supply threshold value, select another dc-battery carry out charge until be full of, it is standby, if charging in dc-battery electricity
Not yet be full of and supplying cell already below power supply threshold value and meanwhile load need continue power, then stop charging, switching two
The charging state of dc-battery；
If the electricity of the electricity of a dc-battery another dc-battery higher than power supply threshold value is less than power supply threshold value,
Then the high dc-battery of selection electricity is powered until less than power supply threshold value, selecting another dc-battery charge until filling
It is full, standby, if the dc-battery electricity in charging is full of higher than power supply threshold value but not yet and supplying cell electricity is low
Loaded simultaneously in power supply threshold value needs to continue to power again, then stops charging, switch the charging state of two dc-batteries；
If the electricity of two dc-batteries is below threshold value of powering, sound and light alarm simultaneously stops after the power supply a period of time that is delayed
Only power, the low battery progress of selection wherein electricity, which charges to electricity, is expired, then to the charging of another battery until the battery electric quantity
It is full, just start again to load supplying in the case where two dc-battery electricity are full.
Above-mentioned control strategy can ensure that output electric energy is supplied by dc-battery completely, realize what ought be powered and not charge
The electric energy of dc-battery electric energy another battery less than power supply threshold value is higher and when being higher than power supply threshold value, switches supplying cell,
And ensure dc-battery that any time only one of which dc-battery powers and power not in charged state.When the high direct current of electric energy
After battery power switch closure, there is no electric current to pass through in the power switch that the dc-battery low with electric energy is connected, now disconnect
The electromagnetic interferences such as spark will not be produced.
Above-mentioned control strategy can ensure that dc-battery possesses lasting electric energy simultaneously, when one of dc-battery electric energy is not enough
And another dc-battery electric energy it is higher when, selection electric energy is high and dc-battery of higher than power supply threshold value is powered, selection electricity
The low dc-battery of energy is charged, and so ensures that the sustainable supply of electric energy；Meanwhile, any time does not only power to one
Dc-battery charge to electricity expire；Extremely in particular cases, when two dc-battery electric energy are not enough, rear class is not supplied
Electricity, the relatively low dc-battery of one electric energy of selection first carry out charging to 2 battery electric quantities it is full untill.
It is different according to DC power polarity, the dc source low ripple that above-mentioned battery last is powered realize circuit can take as
The concrete structure of lower two embodiments.
Embodiment 1
As shown in figure 1, the first dc-battery B1 and the second dc-battery B2 are positive polarity output, charge selection circuit bag
Include the charge switch S1 and charge switch S3 in parallel for being all connected with charging circuit output, charge switch S1 connection diodes D1 sun
Pole, diode D1 negative electrode connects the first dc-battery B1 positive pole and power switch S2 one end, power switch S2 another end
Diode D2 anode is connected, the input and electrochemical capacitor C1 of diode D2 negative electrode connection linear voltage regulator circuit are just
Pole, electrochemical capacitor C1 negative pole ground connection；The negative pole ground connection of first dc-battery；Charge switch S3 connection diodes D3 anode,
Diode D3 negative electrode connects the second dc-battery B2 positive pole and power switch S4 one end, power switch S4 another end connection
Diode D4 anode, the input and electrochemical capacitor C1 positive pole of diode D4 negative electrode connection linear voltage regulator circuit；
The negative pole ground connection of second dc-battery.Diode D2, D4 and electrochemical capacitor C1 are used for the smooth supply for ensureing output electric energy, prevent
Electric energy transfer between the different dc-battery of 2 voltages；
Control circuit obtains charged state by monitoring the electric current at charge switch S1 and charge switch S3, and passes through control
Charge switch S1 and charge switch S3 opens and closes selection and charged for the first dc-battery B1 or the second dc-battery B2, is supplied by monitoring
Electric current at electric switch S2 and power switch S4 obtains power supply state, and by controlling power switch S2 and power switch S4 to open and close
Select to be that the first dc-battery B1 or the second dc-battery B2 power, by the positive terminal voltage and negative terminal that monitor the first dc-battery
Electric current connection 2 inputs nor gate to obtain the first dc-battery state of charge, and by monitoring the anode electricity of the second dc-battery
Pressure and negative terminal electric current connection 2 input nor gate to obtain the second dc-battery state of charge.
Control circuit is using the charge switch S1 monitored, power switch S2, charge switch S3, power switch S4, first
Dc-battery state of charge and the second dc-battery state of charge are controlled as control input by 3 input nor gate logic outputs
Charge switch S1 processed, power switch S2, charge switch S3 and power switch S4 keying.
The operation principle of the present embodiment is as follows：
The control logic of charge switch (by taking S1 as an example) is represented by
When simultaneously following condition is met：(1) (voltage is relatively low when uncharged, or charging current is larger for B1 battery electric quantities deficiency
(underfill)), (2) B1 does not power to rear class, and S2 disconnects, and (3) charging circuit does not charge to B2, and S3 disconnects；Now S1 is connected, right
B1 charges.
When one of following condition is met：(1) when B1 battery electric quantities foot (voltage is higher when uncharged, or charging current compared with
It is small), (2) B1 is powered to rear class, and S2 is connected, and (3) charging circuit charges to B2, and S3 is connected；Now S1 disconnects.
When B1 and B2 voltages are high, S1 and S3 disconnect.
The control logic of power switch (by taking S2 as an example) is represented by
When simultaneously following condition is met：(1) B1 voltages are high, and (2) B1 is uncharged, and S1 disconnects, and (3) B2 does not power, and S4 disconnects；
Now S2 is connected, and B1 powers to rear class.
When one of following condition is met：(1) B1 voltages are not high, and (2) B2 voltages are high, and (3) B1 chargings, S1 is connected；Now S2
Disconnect, B1 does not power to rear class.
Wherein：Logical symbol " " represents that " logical AND " or " logic multiply ", i.e. condition are met simultaneously when, output just has
Effect.
Logical symbol "+" represents " logic or " or " logic add ", i.e., when one of condition is met, and output is just effective.
For positive polarity output circuit, generally ensure that S1, S2 are not also turned on, S3, S4 are not also turned on, S1, S3
It is not also turned on, S2, S4 can be also turned on.
Embodiment 2
As shown in Fig. 2 the first dc-battery B3 and the second dc-battery B4 are negative polarity output, charge selection circuit bag
Include the charge switch S5 and charge switch S7 in parallel for being all connected with charging circuit output, charge switch S5 connection diodes D5 the moon
Pole, diode D5 anode connects the first dc-battery B3 negative pole and power switch S6 one end, power switch S6 another end
Connect diode D6 negative electrode, the diode D6 input of anode connection linear voltage regulator circuit and bearing for electrochemical capacitor C3
Pole, electrochemical capacitor C3 plus earth；The plus earth of first dc-battery.Charge switch S7 connection diodes D7 negative electrode,
Diode D7 anode connects the second dc-battery B4 negative pole and power switch S8 one end, power switch S8 another end connection
Diode D8 negative electrode, the input and electrochemical capacitor C3 negative pole of diode D8 anode connection linear voltage regulator circuit；
The plus earth of second dc-battery.Diode D6, D8 and electrochemical capacitor C3 are used for the smooth supply for ensureing output electric energy, prevent
Electric energy transfer between the different dc-battery of 2 voltages；
Control circuit obtains charged state by monitoring the electric current at charge switch S5 and charge switch S7, and passes through control
Charge switch S5 and charge switch S7 opens and closes selection and charged for the first dc-battery B3 or the second dc-battery B4, is supplied by monitoring
Electric current at electric switch S6 and power switch S8 obtains power supply state, and by controlling power switch S6 and power switch S8 to open and close
Select to be that the first dc-battery B3 or the second dc-battery B4 power.
The control principle of the present embodiment and embodiment 1 are similar.
Linear regulating circuit of the present invention is by connecting the LM78/LM79 chain of series voltage stabilizing chips that power supply selection circuit is exported
To obtain fixed voltage output, ensure power supply circuit switching by connecting the electrochemical capacitor C1/C3 of voltage stabilizing chip output end
Voltage stabilization is exported in short time.
Claims (9)
1. a kind of dc source low ripple implementation method that battery last is powered, chargeable, ripple-free dc-battery passes through line
Property voltage-regulating circuit after power to the load, it is characterised in that the dc-battery has two, synchronization only have one it is straight
Galvanic battery is powered, and the dc-battery of power supply is in non-charged state, and another battery if electricity completely if in standby
With state, otherwise in charged state.
2. the dc source low ripple implementation method that battery last according to claim 1 is powered, it is characterised in that load
Electric energy is complete by two dc-battery alternative supplies,
If the electricity of two batteries is above threshold value of powering, the wherein higher dc-battery of electricity is selected to power until being less than
Power threshold value, select another dc-battery carry out charge until be full of, it is standby, if charging in dc-battery electricity not yet
Be full of and supplying cell already below power supply threshold value and meanwhile load need continue power, then stop charging, switching two direct currents
The charging state of battery；
If the electricity of the electricity of a dc-battery another dc-battery higher than power supply threshold value is selected less than power supply threshold value
Select the high dc-battery of electricity power until less than power supply threshold value, select another dc-battery carry out charge until be full of, it is standby
With, if charging in dc-battery electricity higher than power supply threshold value but be not yet full of and supplying cell electricity already below power supply
Threshold value is loaded simultaneously to be needed to continue to power again, then stops charging, switch the charging state of two dc-batteries；
If the electricity of two dc-batteries is below threshold value of powering, sound and light alarm simultaneously stops supplying after the power supply a period of time that is delayed
Electricity, the selection wherein low battery of electricity, which carries out charging to electricity, expires, then to the charging of another battery until the battery electric quantity is full,
Two dc-battery electricity just start again to load supplying in the case of expiring.
3. the dc source low ripple that a kind of battery last is powered realizes circuit, it is characterised in that including：
Charging circuit, connects alternating current and provides rechargeable electrical energy for dc-battery；
Charge selection circuit, according to the signal of control circuit, controls charging circuit to be the first dc-battery or second by switch
Dc-battery charges；
The electricity of circuit, the first dc-battery of collection and the second dc-battery is controlled, selection wherein electricity is higher and higher than power supply
Threshold value person is that linear voltage regulator circuit is supplied power to less than power supply threshold value, and the junior's progress of selection electricity, which charges to electricity, is expired；
First dc-battery, electricity is more than power supply threshold value and the second dc-battery is supplied power to when being less than power supply threshold value, is linear electricity
Pressure adjustment circuit is powered；
Second dc-battery, electricity is more than power supply threshold value and the first dc-battery is supplied power to when being less than power supply threshold value, is linear electricity
Pressure adjustment circuit is powered；
Power selection circuit, according to the signal of control circuit, control the first dc-battery or the second dc-battery to be by switch
Linear voltage regulator circuit is powered；
Linear voltage regulator circuit, it is load supplying after Serial regulation that battery powered DC voltage, which is carried out,.
4. the dc source low ripple that battery last is powered according to claim 3 realizes circuit, it is characterised in that described
One dc-battery and the second dc-battery are positive polarity output, and the charging selection circuit includes being all connected with charging circuit output
Charge switch S1 and charge switch S3 in parallel, charge switch S1 connection diodes D1 anode, diode D1 negative electrode connects
Connect the positive pole of the first dc-battery and power switch S2 one end, power switch S2 another end connection diode D2 anode, two
The input and electrochemical capacitor C1 positive pole of pole pipe D2 negative electrode connection linear voltage regulator circuit, electrochemical capacitor C1 negative pole connect
Ground；The negative pole ground connection of first dc-battery；Charge switch S3 connection diodes D3 anode, diode D3 negative electrode connection second
The positive pole of dc-battery and power switch S4 one end, power switch S4 another end connection diode D4 anode, diode D4
Negative electrode connection linear voltage regulator circuit input and electrochemical capacitor C1 positive pole；The negative pole ground connection of second dc-battery；
The control circuit obtains charged state by monitoring the electric current at charge switch S1 and charge switch S3, and by controlling to charge
It is that the first dc-battery or the second dc-battery charge to switch S1 and charge switch S3 and open and close selection, by monitoring power switch S2
Power supply state is obtained with the electric current at power switch S4, and is the by controlling power switch S2 and power switch S4 to open and close selection
One dc-battery or the second dc-battery are powered.
5. the dc source low ripple that battery last is powered according to claim 3 realizes circuit, it is characterised in that described
One dc-battery and the second dc-battery are negative polarity output, and the charging selection circuit includes being all connected with charging circuit output
Charge switch S5 and charge switch S7 in parallel, charge switch S5 connection diodes D5 negative electrode, diode D5 anode connects
Connect the negative pole of the first dc-battery and power switch S6 one end, power switch S6 another end connection diode D6 negative electrode, two
The input and electrochemical capacitor C3 negative pole of pole pipe D6 anode connection linear voltage regulator circuit, electrochemical capacitor C3 positive pole connect
Ground；The plus earth of first dc-battery；Charge switch S7 connection diodes D7 negative electrode, diode D7 anode connection second
The negative pole of dc-battery and power switch S8 one end, power switch S8 another end connection diode D8 negative electrode, diode D8
Anode connection linear voltage regulator circuit input and electrochemical capacitor C3 negative pole；The plus earth of second dc-battery；
The control circuit obtains charged state by monitoring the electric current at charge switch S5 and charge switch S7, and by controlling to charge
It is that the first dc-battery or the second dc-battery charge to switch S5 and charge switch S7 and open and close selection, by monitoring power switch S6
Power supply state is obtained with the electric current at power switch S8, and is the by controlling power switch S6 and power switch S8 to open and close selection
One dc-battery or the second dc-battery are powered.
6. the dc source low ripple that battery last is powered according to claim 4 realizes circuit, it is characterised in that described
One dc-battery and the second dc-battery are positive polarity battery, and the control circuit includes the voltage of connection diode D1 anodes
Acquisition Circuit, connects the voltage collection circuit of diode D2 anodes, connects the voltage collection circuit of diode D3 anodes, connection two
The voltage collection circuit of pole pipe D4 anodes, connects the voltage collection circuit of the first dc-battery positive pole, connects the first dc-battery
The current collection circuit of negative pole, connects the voltage collection circuit of the second dc-battery positive pole, the second dc-battery negative pole of connection
Current collection circuit, each Acquisition Circuit output connects two 2 input nor gates and four 3 input nor gates respectively, and four 3 defeated
Enter the output difference connecting valve S1, switch S2, the control end for switching S3, switching S4 of nor gate.
7. the dc source low ripple that battery last is powered according to claim 5 realizes circuit, it is characterised in that described
One dc-battery and the second dc-battery are negative polarity battery, and the control circuit includes the voltage of connection diode D5 negative electrodes
Acquisition Circuit, connects the voltage collection circuit of diode D6 negative electrodes, connects the voltage collection circuit of diode D7 negative electrodes, connection two
The voltage collection circuit of pole pipe D8 negative electrodes, connects the voltage collection circuit of the first dc-battery negative pole, connects the first dc-battery
The current collection circuit of positive pole, connects the voltage collection circuit of the second dc-battery negative pole, the second dc-battery positive pole of connection
Current collection circuit, each Acquisition Circuit output connects two 2 input nor gates and four 3 input nor gates respectively, and four 3 defeated
Enter the output difference connecting valve S5, switch S6, the control end for switching S7, switching S8 of nor gate.
8. the dc source low ripple that the battery last according to claim 3 or 4 is powered realizes circuit, it is characterised in that institute
It is positive polarity output to state the first dc-battery and the second dc-battery, and linear voltage regulator circuit includes connection power supply selection electricity
The LM78 chain of series voltage stabilizing chips of road output, voltage stabilizing chip earth terminal ground connection, voltage stabilizing chip output end connection electrochemical capacitor C2
Positive pole, electrochemical capacitor C2 negative poles ground connection.
9. the dc source low ripple that the battery last according to claim 3 or 5 is powered realizes circuit, it is characterised in that institute
It is negative polarity output to state the first dc-battery and the second dc-battery, and linear voltage regulator circuit includes connection power supply selection electricity
The LM79 chain of series voltage stabilizing chips of road output, voltage stabilizing chip earth terminal ground connection, voltage stabilizing chip output end connection electrochemical capacitor C4
Negative pole, electrochemical capacitor C4 plus earths.
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| CN106026357A (en) * | 2016-06-04 | 2016-10-12 | 武汉百络优物联科技有限公司 | Continuous power-supply type sensor |
| CN106532921A (en) * | 2016-12-27 | 2017-03-22 | 国网江西省电力公司电力科学研究院 | Dual-battery DC power supply device |
| CN107947328A (en) * | 2017-11-28 | 2018-04-20 | 浙江力俭新能源科技有限公司 | A kind of power supply unit of sustainable power supply |
| CN109061248A (en) * | 2018-06-13 | 2018-12-21 | 西安石油大学 | It is a kind of can Spline smoothing DC test power supply implementation method and circuit |
| CN110380606A (en) * | 2019-08-21 | 2019-10-25 | 济南瑞森智能科技有限公司 | A kind of power supply unit switching shielding electromagnetic interference using timing |
| CN110460033A (en) * | 2019-08-23 | 2019-11-15 | 李芝宏 | A kind of the maintainability test DC power system and method for low ripple |
| CN110687471A (en) * | 2019-08-29 | 2020-01-14 | 国网浙江省电力有限公司金华供电公司 | Direct current power supply aging monitoring system |
| CN112087045B (en) * | 2020-09-10 | 2022-05-31 | 陕西疆晨信息科技有限公司 | Iron tower power supply method based on differential standby power equipment |
| CN115411831A (en) * | 2022-11-02 | 2022-11-29 | 上海泰矽微电子有限公司 | Low-ripple power supply system and method for small signal sampling |
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| CN201742109U (en) * | 2009-11-30 | 2011-02-09 | 成都林海电子有限责任公司 | Portable mobile terminal power supply |
| CN202218050U (en) * | 2011-09-28 | 2012-05-09 | 深圳市欣视景科技有限公司 | Dual-battery charging-discharging management circuit |
| US9231440B2 (en) * | 2012-04-18 | 2016-01-05 | Samsung Sdi Co., Ltd. | Power supply apparatus and controlling method of the same |
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