CN104821634A - Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same - Google Patents
Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same Download PDFInfo
- Publication number
- CN104821634A CN104821634A CN201510274679.8A CN201510274679A CN104821634A CN 104821634 A CN104821634 A CN 104821634A CN 201510274679 A CN201510274679 A CN 201510274679A CN 104821634 A CN104821634 A CN 104821634A
- Authority
- CN
- China
- Prior art keywords
- voltage
- power supply
- pins
- electric capacity
- control circuit
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and a method for realizing electric quantity detection by utilizing the system, belongs to the field of a multiple-path low-voltage DC power supply, and solves the problem that amplitude of output voltage of an existing power supply is single, and the multiple-path low-voltage power supply cannot be provided. The system comprises a 16 V lithium battery, a sampling circuit, a control circuit, a display screen, a voice circuit and a multiple-path low-voltage DC power supply processing circuit. The voltage signal output end of the16 V lithium battery is connected with the voltage signal input end of the sampling circuit and the voltage signal input end of the multiple-path low-voltage DC power supply processing circuit; the multiple-path low-voltage DC power supply processing circuit is used for processing the received voltage signal to obtain +/- 5V, +/- 12V and +3.3 V power supplies; the data signal output end of the sampling circuit is connected with the data signal input end of the control circuit; and the display signal output end of the control circuit is connected with the display signal input end of the display screen. The system and the method are mainly used for the power supply field.
Description
Technical field
The invention belongs to multichannel low-voltage DC source domain.
Background technology
Electronic equipment brings great convenience to people's daily life, and all electronic equipments only could normal work under the support of power circuit.The requirement of electronic equipment to power circuit to provide electric energy that is continual and steady, that meet load request, and all require under normal circumstances to provide galvanic current energy.The power supply providing this galvanic current energy is exactly D.C. regulated power supply.
Stabilized voltage power supply is the power source of various electronic circuit, is described as the heart of circuit by people.People all knows, all power consumption equipments, comprise electronic instruments, household electrical appliance etc., has certain requirement to supply power voltage.Such as: some television set require the grid voltage change of 220V can not exceed ± 20%, namely between 198V to 242V, go beyond the scope if super, television set just can not normally be watched, even can burn out television set because of overtension.As for precision electronic device, supply power voltage is kept stablizing constant requirement just stricter.Require that power supply is stable for solving power consumption equipment, and utility grid voltage is difficult to the disparities between supply and demand of guarantee, people just have developed various stabilized voltage power supply.
In modern times many high-tech electronic products, a kind of magnitude of voltage can not satisfy the demands, and many products need the magnitude of voltage that many kinds are different simultaneously, therefore multiple power supplies all has very high effect in many products.And the supply power voltage of many products in life is all within our safe voltage, namely within 36V, so low pressure be unable to do without our life, the energy source of many products also be unable to do without low-voltage dc power supply.So it is convenient not only to bring to the life of people based on the multichannel low-voltage dc power supply of lithium battery, goes up in a lot of fields and also there is very high use value, as space flight, boats and ships and teaching field etc. all have a wide range of applications.
At present, usually powered battery is adopted when design electronic products.When using powered battery, the current state of battery is that user is concerned about, as mobile phone, notebook computer etc. can show current state of charge in real time.Lithium battery is the energy source of whole calamity emergency survival capsule, therefore, battery allowance Real-Time Monitoring is just seemed especially important.
Summary of the invention
The present invention is that the amplitude in order to solve existing power supply device output voltage is single, cannot provide multichannel low-tension supply problem, the invention provides the detection method of quantity of electricity that a kind of carried charge detects lithium battery multichannel low-voltage DC origin system and adopts this system to realize.
Carried charge detects lithium battery multichannel low-voltage DC origin system, and it comprises 16V lithium battery, sample circuit, control circuit, display screen, sound circuit and multichannel low-voltage dc power supply treatment circuit;
Display screen adopts LCD1286 type LCDs to realize,
The voltage signal output end of 16V lithium battery is connected with the voltage signal inputs of the voltage signal inputs of sample circuit and multichannel low-voltage dc power supply treatment circuit, the voltage signal that multichannel low-voltage dc power supply treatment circuit is used for receiving carries out process acquisition ± 5V, ± 12V ,+3.3V power supply
The data signal output of sample circuit is connected with the data signal input of control circuit, the display output of control circuit is connected with the display input of display screen, and the voice signal output of control circuit is connected with the speech signal input of sound circuit;
Multichannel low-voltage dc power supply treatment circuit comprises regulator, step-down controller, switching voltage capacity commutator, transformer, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, polar capacitor C5, polar capacitor C6, polar capacitor C7, electric capacity C8, polar capacitor C9, diode D1, diode D2, diode D3, voltage stabilizing didoe D4 and inductance L 1
Regulator adopts LM2596 cake core to realize, and step-down controller adopts LM2675 cake core to realize, and switching voltage capacity commutator adopts LTC660 cake core to realize,
One end of electric capacity C1 as the voltage signal inputs of multichannel low-voltage dc power supply treatment circuit,
The other end of electric capacity C1, regulator No. 3 and No. 5 pins connect power supply ground simultaneously,
No. 2 pins of regulator are connected with the negative electrode of diode D1, the Same Name of Ends of primary transformer coil simultaneously,
The other end of the anode of diode D1 and one end of electric capacity C2 and electric capacity C1 connects power supply ground simultaneously,
No. 4 pins of regulator are connected with No. 8 pins of the other end of electric capacity C2, the different name end of primary transformer coil and switching voltage capacity commutator simultaneously,
No. 4 pins of regulator as the output of+5V power supply,
The different name end of secondary transformer is connected with the anode of diode D2, and the negative electrode of diode D2 is connected with the positive pole of one end of electric capacity C3, No. 2 pins of step-down controller and polar capacitor C7 simultaneously,
The center tap of secondary transformer is connected with the other end of electric capacity C3 and one end of electric capacity C4 simultaneously, and the center tap of secondary transformer connects power supply ground,
The negative electrode of the terminating diode D3 of the same name of secondary transformer, the anode of diode D3 connects the other end of electric capacity C4,
The anode of diode D3 as the output of-12V power supply,
The negative electrode of diode D2 as the output of-12V power supply,
No. 2 pins of switching voltage capacity commutator connect the positive pole of polar capacitor C5, and the negative pole of polar capacitor C5 connects No. 4 pins of switching voltage capacity commutator,
No. 3 pins of switching voltage capacity commutator connect the negative pole of polar capacitor C6, and No. 3 pins of switching voltage capacity commutator connect power supply ground,
The positive pole of polar capacitor C6 connects No. 5 pins of switching voltage capacity commutator,
No. 6 pins of switching voltage capacity commutator connect power supply ground,
No. 5 pins of switching voltage capacity commutator as the output of-5V power supply,
No. 6 pins of step-down controller are connected with the negative pole of the negative pole of polar capacitor C7, the positive pole of voltage stabilizing didoe D4 and polar capacitor C9 simultaneously, and the negative pole of polar capacitor C9 connects power supply ground,
No. 8 pins of step-down controller are connected with one end of the negative pole of voltage stabilizing didoe D4, one end of inductance L 1 and electric capacity C8 simultaneously,
No. 1 pin of step-down controller is connected with the other end of electric capacity C8,
No. 4 pins of step-down controller are connected with the other end of inductance L 1,
The other end of inductance L 1 is as the output of+3.3V power supply.
The magnetic core air gap of described transformer is 1.7mm, and the number of turn of primary transformer coil is 12 circles, and the diameter of primary transformer coil is 0.071mm, and the number of turn of secondary transformer is 30 circles, and the diameter of secondary transformer is 0.112mm.
Described control circuit comprises main control circuit, inductance L 2 and inductance L 3,
Described main control circuit adopts C8051F020 type chip microcontroller,
One end of described inductance L 2 as the data signal input of control circuit,
The other end of inductance L 2 is connected with the data signal input of main control circuit and one end of inductance L 3 simultaneously, another termination power ground of inductance L 3,
The display output of main control circuit as the display output of control circuit,
The voice signal output of main control circuit is as the voice signal output of control circuit.
Adopt carried charge to detect the detection method of quantity of electricity of lithium battery multichannel low-voltage DC origin system realization, the detailed process of the method is:
C8051F020 type single-chip microcomputer inside is embedded with the fit equation module of battery electric quantity,
First, the initialization of C8051F020 type single-chip microcomputer, by C8051F020 type single-chip microcomputer to display screen initialization, the A/D initialization of register of this C8051F020 type single-chip microcomputer inside, open A/D register, A/D register waits for the sampled signal that sample circuit exports, the wait sampled signal that A/D register is real-time
After A/D register receives sampled signal, this sampled signal is read, and after A/D conversion is carried out to sampled signal, sends into fit equation module and carry out matching, export fitting result to display screen, shown by display screen,
When the electricity of fitting result is less than 10%, by sound circuit, voice broadcast is carried out to current residual electricity,
When the electricity of fitting result is more than or equal to 10%, complete the detection of this sampled signal.
Described employing carried charge detects the detection method of quantity of electricity that lithium battery multichannel low-voltage DC origin system realizes, and the initialized idiographic flow of C8051F020 type single-chip microcomputer is:
Start, forbid house dog, allow crossbar configuration register work, each I/O mouth of C8051F020 type single-chip microcomputer is configured, and its external crystal-controlled oscillation is configured, complete the initialization of C8051F020 type single-chip microcomputer.
The beneficial effect that the present invention brings is, based on the multichannel low-voltage dc power supply of lithium battery, have also been devised a kind of SCM Based electric quantity of lithium ion batteries detection system, Chip Microcomputer A/D is used to sample the voltage of its battery, achieve the Real-Time Monitoring to dump energy, and measurement data is sent to LCD12864 liquid crystal display.This system has stability feature high, low in energy consumption.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the carried charge detection lithium battery multichannel low-voltage DC origin system described in embodiment one;
Fig. 2 is the circuit connecting relation figure of the multichannel low-voltage dc power supply treatment circuit described in embodiment one;
Fig. 3 is the circuit connecting relation figure of the control circuit described in embodiment three;
Fig. 4 detects the flow chart of the detection method of quantity of electricity of lithium battery multichannel low-voltage DC origin system realization for the employing carried charge described in embodiment four;
Fig. 5 is the initialized flow chart of C8051F020 type single-chip microcomputer described in embodiment five;
Fig. 6 is ± circuit connection diagram that exports of 12V and+5V;
Fig. 7 is the circuit connection diagram exporting 3.3V;
Fig. 8 is the circuit connection diagram that-5V exports;
Fig. 9 is the initialization flowchart of ADC0.
Embodiment
Embodiment one: present embodiment is described see Fig. 1 and Fig. 2, carried charge described in present embodiment detects lithium battery multichannel low-voltage DC origin system, and it comprises 16V lithium battery 1, sample circuit 2, control circuit 3, display screen 4, sound circuit 5 and multichannel low-voltage dc power supply treatment circuit 6;
Display screen 4 adopts LCD1286 type LCDs to realize,
The voltage signal output end of 16V lithium battery 1 is connected with the voltage signal inputs of the voltage signal inputs of sample circuit 2 and multichannel low-voltage dc power supply treatment circuit 6, multichannel low-voltage dc power supply treatment circuit 6 is for carrying out process acquisition ± 5V, ± 12V ,+3.3V power supply to the voltage signal received
The data signal output of sample circuit 2 is connected with the data signal input of control circuit 3, the display output of control circuit 3 is connected with the display input of display screen 4, and the voice signal output of control circuit 3 is connected with the speech signal input of sound circuit 5;
Multichannel low-voltage dc power supply treatment circuit 6 comprises regulator U1, step-down controller U2, switching voltage capacity commutator U3, transformer U4, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, polar capacitor C5, polar capacitor C6, polar capacitor C7, electric capacity C8, polar capacitor C9, diode D1, diode D2, diode D3, voltage stabilizing didoe D4 and inductance L 1
Regulator U1 adopts LM2596 cake core to realize, and step-down controller U2 adopts LM2675 cake core to realize, and switching voltage capacity commutator U3 adopts LTC660 cake core to realize,
One end of electric capacity C1 as the voltage signal inputs of multichannel low-voltage dc power supply treatment circuit 6,
The other end of electric capacity C1, regulator U1 No. 3 and No. 5 pins connect power supply ground simultaneously,
No. 2 pins of regulator U1 are connected with the negative electrode of diode D1, the Same Name of Ends of transformer U4 primary coil simultaneously,
The other end of the anode of diode D1 and one end of electric capacity C2 and electric capacity C1 connects power supply ground simultaneously,
No. 4 pins of regulator U1 are connected with No. 8 pins of the other end of electric capacity C2, the different name end of transformer U4 primary coil and switching voltage capacity commutator U3 simultaneously,
No. 4 pins of regulator U1 as the output of+5V power supply,
The different name end of transformer U4 secondary coil is connected with the anode of diode D2, and the negative electrode of diode D2 is connected with the positive pole of one end of electric capacity C3, No. 2 pins of step-down controller U2 and polar capacitor C7 simultaneously,
The center tap of transformer U4 secondary coil is connected with the other end of electric capacity C3 and one end of electric capacity C4 simultaneously, and the center tap of transformer U4 secondary coil connects power supply ground,
The negative electrode of the terminating diode D3 of the same name of transformer U4 secondary coil, the anode of diode D3 connects the other end of electric capacity C4,
The anode of diode D3 as the output of-12V power supply,
The negative electrode of diode D2 as the output of-12V power supply,
No. 2 pins of switching voltage capacity commutator U3 connect the positive pole of polar capacitor C5, and the negative pole of polar capacitor C5 connects No. 4 pins of switching voltage capacity commutator U3,
No. 3 pins of switching voltage capacity commutator U3 connect the negative pole of polar capacitor C6, and No. 3 pins of switching voltage capacity commutator U3 connect power supply ground,
The positive pole of polar capacitor C6 connects No. 5 pins of switching voltage capacity commutator U3,
No. 6 pins of switching voltage capacity commutator U3 connect power supply ground,
No. 5 pins of switching voltage capacity commutator U3 as the output of-5V power supply,
No. 6 pins of step-down controller U2 are connected with the negative pole of the negative pole of polar capacitor C7, the positive pole of voltage stabilizing didoe D4 and polar capacitor C9 simultaneously, and the negative pole of polar capacitor C9 connects power supply ground,
No. 8 pins of step-down controller U2 are connected with one end of the negative pole of voltage stabilizing didoe D4, one end of inductance L 1 and electric capacity C8 simultaneously,
No. 1 pin of step-down controller U2 is connected with the other end of electric capacity C8,
No. 4 pins of step-down controller U2 are connected with the other end of inductance L 1,
The other end of inductance L 1 is as the output of+3.3V power supply.
In present embodiment, the output of ± 12V and+5V, specifically see Fig. 6; The output of 3.3V power supply, specifically see Fig. 7; The output of-5V power supply, specifically see Fig. 8.
In Fig. 2, when ± 12V exports, the switching tube of transformer U4 and LM2596 cake core inside forms the interval oscillator of self-excitation (or separate excitation) formula, thus input direct voltage is modulated into a high-frequency pulse voltage.It can play energy transfer and conversion effect.In circuit of reversed excitation, when the switching tube conducting of LM2596 cake core inside, transformer converts magnetic field energy to electric energy and stores, and then discharges when switching tube ends.This switching tube is provided by LM2596 chip.
Any voltage after the conversion of transformer electromagnetic voltage, output must be alternating voltage, therefore major loop must be gone here and there a rectifier diode and carried out rectification, can be just that unidirectional pulsating dc voltage exports.
From circuit shown in Fig. 7, this circuit be input as 12V, export as 3.3V exports, peripheral circuit and the LM2596 of LM2675 chip are similar, many boost capacitors between CB and Vsw in the peripheral circuit of only LM2675 chip, electric capacity C8 in Fig. 7 is boost capacitor, this electric capacity C8 and voltage stabilizing didoe D4 constitutes booster circuit, usual use electric capacity and a diode, capacitive charge storage, diode prevents current flow pours in down a chimney, time frequency is higher, the voltage of booster circuit is exactly the voltage that the voltage of circuit input adds on electric capacity, play the effect of boosting, in this circuit, the voltage of CB is the output voltage that capacitance voltage adds Vsw, use 0.01 μ F, but the voltage of the ceramic condenser CB of 50V reaches 12V, its objective is to power to LM2675 internal switch pipe, it is made fully to connect.
From the circuit connection diagram that-5V shown in Fig. 8 exports, fairly simple when LTC660 uses, only need two electric capacity can complete the output of-5V.In figure, the occupation mode of LVE mainly compares with input voltage (that is: LTC660 chip No. 8 pins receive voltage), so when input voltage connects GND lower than LVE during 3V, when input voltage can connect GND or unsettled higher than LVE during 3V.When input voltage is less than 3V, this switch of CLOSED WHENE of LTC660 chip internal will disconnect, and the SOC of LTC660 chip internal this part need to connect GND, so when LVE must meet GND, SOC this part just can be connected to GND.When input voltage is greater than 3V, this switch of CLOSED WHENE will close, and this part GND of SOC can directly be connected with the GND pin of chip, so LVE can ground connection, and also can be unsettled.
Electric capacity C5 is the electric capacity that this chip exterior must connect, and its objective is that the flow direction flowing through chip internal double-pole switch in order to ensure electric current is unidirectional, and electric capacity C6 is mainly in order to filtering and the effect suppressing ripple.
The Ripple Suppression of power supply is mainly according to output capacitance withstand voltage, and electrochemical capacitor withstand voltage should be at least 1.5 times of output voltage, in order to obtain the lower output voltage of ripple, needs the capacitor of higher withstand voltage.Such as: when exporting as 5V, when the electrochemical capacitor selected is 220 μ F/10V, then the withstand voltage of output capacitance is at least 7.5V or higher than this value.But even if under low equivalent resistance and switching stage, the alminium electrolytic condenser of 220 μ F/10V also can produce the equiva lent impedance of about 225 Ω, so large equivalent resistance can produce relatively high output ripple voltage at output.Ripple voltage to be dropped to 1% or lower of output voltage, just need the electric capacity that selection one withstand voltage (low equivalent resistance) is higher or capacitance is higher.The electric capacity of 16V or 25V almost can drop to original half ripple voltage.So, withstand voltage higher electric capacity should be selected when selecting output capacitance, like this could more effective suppression ripple.
Embodiment two: the difference that present embodiment and the carried charge described in embodiment one detect lithium battery multichannel low-voltage DC origin system is, the magnetic core air gap of described transformer is 1.7mm, and the number of turn of transformer U4 primary coil is 12 circles, the diameter of transformer U4 primary coil is 0.071mm, the number of turn of transformer U4 secondary coil is 30 circles, and the diameter of transformer U4 secondary coil is 0.112mm.
Present embodiment, design of transformer index comprises: input voltage, output voltage, output current, efficiency eta, operating frequency f, maximum conducting duty ratio Dmax and maximum functional magnetic flux density Bmax.
In Fig. 6, the output gross power of ± 12V power output circuit is 1.2W, adopts inverse-excitation type switch power-supply, total two output voltage, and output voltage is ± 12V/50mA; Input voltage V
infor 5V; Efficiency eta gets 0.85; Operating frequency is at 50kHz; Maximum conducting duty ratio Dmax=0.5.
1. calculate input power, input voltage, input current and peak current
+ 5V power supply exports the algebraical sum that gross power Pout equals transformer secondary winding power output, V
on, I
onrepresent the output voltage of the n-th secondary winding, electric current respectively, n is positive integer.
P
out＝V
o1I
o1+V
o2I
o2+V
o3I
o3+...+V
onI
on(2-1)，
So the power output that can calculate transformer by formula (2-1) is:
P
out＝2×12×0.05＝1.2W (2-2)，
For the input power of transformer primary side winding, the power of former limit winding is not equal to the gross power of vice-side winding, because consider in transformer lossy, so the power P of former limit winding
inshould be:
Calculating transformer average current input I
infor:
Estimation transformer peak current I
pkfor:
Wherein: K=5.5 (circuit of reversed excitation)
2. calculate former limit winding inductance minimum value
3. calculate magnetic core air gap
The design of flyback transformer must introduce magnetic core air gap, otherwise magnetic core will be caused saturated.The saturated primary inductance amount that will cause of magnetic core sharply declines, and reduces, cause current break, burn device the inhibition of electric current.Thus need to add suitable air gap at magnetic loop, can magnetic core air gap be calculated according to formula 2-6:
Wherein, Ae is the net sectional area of magnetic core, and unit is 0.6cm
2, Bmax is peakflux density, mainly selects according to the material of magnetic core, and unit is T.
4. calculate number of turn N needed for the winding of former limit
0
Because result of calculation is 11.9, conveniently make so get 12 circles.Wherein, A
lfor inductance coefficent, value is 2100nH/N
2.
5. calculate number of turn N needed for secondary winding
1
Get 30 circles, V
d1represent the pressure drop on the diode that this winding is connected.
6. diameter of wire
The diameter of former limit winding is:
The diameter of vice-side winding is:
Wherein, J is current density, general J=4A/mm
2
So far, can go out according to above parameter designing the flyback transformer that native system wants, ± the output of 12V can be drawn, in addition, in the above process introduced, net sectional area Ae, the peakflux density Bmax of magnetic core and inductance coefficent A
lthree parameters can check according to magnetic core parameter list.
Embodiment three: present embodiment is described see Fig. 3, the difference that present embodiment and the carried charge described in embodiment one detect lithium battery multichannel low-voltage DC origin system is, described control circuit 3 comprises main control circuit, inductance L 2 and inductance L 3
Described main control circuit adopts C8051F020 type chip microcontroller,
One end of described inductance L 2 as the data signal input of control circuit 3,
The other end of inductance L 2 is connected with the data signal input of main control circuit and one end of inductance L 3 simultaneously, another termination power ground of inductance L 3,
The display output of main control circuit as the display output of control circuit 3,
The voice signal output of main control circuit is as the voice signal output of control circuit 3.
Present embodiment, because the A/D sampled voltage of C8051F020 single-chip microcomputer is for generally can not more than 2.5V, and the voltage of battery is 16V, so will add a bleeder circuit, shares certain voltage, makes the voltage of its sampling end be below 3V, makes system safer.
When battery electric quantity is for full electricity, its voltage is 16.8V, and the dividing potential drop of the bleeder circuit of design is original 1/8.5, so the maximum voltage that single-chip microcomputer is sampled is about 2V, when cell voltage declines, the voltage of sampling also can descend by, thus judge battery dump energy.
Embodiment four: present embodiment is described see Fig. 4, adopt the carried charge described in embodiment three to detect the detection method of quantity of electricity of lithium battery multichannel low-voltage DC origin system realization, the detailed process of the method is:
C8051F020 type single-chip microcomputer inside is embedded with the fit equation module of battery electric quantity,
First, the initialization of C8051F020 type single-chip microcomputer, by C8051F020 type single-chip microcomputer to display screen 4 initialization, the A/D initialization of register of this C8051F020 type single-chip microcomputer inside, open A/D register, A/D register waits for the sampled signal that sample circuit 2 exports, the wait sampled signal that A/D register is real-time
After A/D register receives sampled signal, this sampled signal is read, and after A/D conversion is carried out to sampled signal, sends into fit equation module and carry out matching, fitting result is exported to display screen 4, shown by display screen 4,
When the electricity of fitting result is less than 10%, carry out voice broadcast by sound circuit 5 pairs of current residual electricity,
When the electricity of fitting result is more than or equal to 10%, complete the detection of this sampled signal.
In present embodiment, in the design, control LCD12964 screen is C8051F020 single-chip microcomputer, so want to allow screen display character just first carry out initialization to single-chip microcomputer, be exactly secondly to screen initialization, then just can write the character wanting to show in principal function.
In the A/D initialization of register process of C8051F020 type single-chip microcomputer inside, the ADC0 subsystem of C8051F020 is exactly the successive approximation register type ADC of a 100ksps, 12 bit resolutions, it comprises the programmable analog MUX (AMUX0) of 9 passages, the successive approximation register type ADC of a programmable gain amplifier (PGA0) and 100kps, 12 bit resolutions, is integrated with track and hold circuit and windows detector able to programme in ADC.AMUX0, PGA0, data transfer method and windows detector all can be controlled by special function register with software.ADC0 subsystem (ADC0, track-hold circuit and PGA0) when the AD0EN position in ADC0 control register is set to 1 is only had just to be allowed to work.When AD0EN position is 0, ADC0 subsystem is in low-power consumption and turns off mode.The initialization flowchart of ADC0 as shown in Figure 9.
The difference that embodiment five present embodiment and the employing carried charge described in embodiment four detect the detection method of quantity of electricity that lithium battery multichannel low-voltage DC origin system realizes is, the initialized idiographic flow of C8051F020 type single-chip microcomputer is:
Start, forbid house dog, allow crossbar configuration register work, each I/O mouth of C8051F020 type single-chip microcomputer is configured, and its external crystal-controlled oscillation is configured, complete the initialization of C8051F020 type single-chip microcomputer.
Claims (5)
1. carried charge detects lithium battery multichannel low-voltage DC origin system, it is characterized in that, it comprises 16V lithium battery (1), sample circuit (2), control circuit (3), display screen (4), sound circuit (5) and multichannel low-voltage dc power supply treatment circuit (6);
Display screen (4) adopts LCD1286 type LCDs to realize,
The voltage signal output end of 16V lithium battery (1) is connected with the voltage signal inputs of the voltage signal inputs of sample circuit (2) and multichannel low-voltage dc power supply treatment circuit (6), multichannel low-voltage dc power supply treatment circuit (6) is for carrying out process acquisition ± 5V, ± 12V ,+3.3V power supply to the voltage signal received
The data signal output of sample circuit (2) is connected with the data signal input of control circuit (3), the display output of control circuit (3) is connected with the display input of display screen (4), and the voice signal output of control circuit (3) is connected with the speech signal input of sound circuit (5);
Multichannel low-voltage dc power supply treatment circuit (6) comprises regulator (U1), step-down controller (U2), switching voltage capacity commutator (U3), transformer (U4), electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, polar capacitor C5, polar capacitor C6, polar capacitor C7, electric capacity C8, polar capacitor C9, diode D1, diode D2, diode D3, voltage stabilizing didoe D4 and inductance L 1
Regulator (U1) adopts LM2596 cake core to realize, and step-down controller (U2) adopts LM2675 cake core to realize, and switching voltage capacity commutator (U3) adopts LTC660 cake core to realize,
One end of electric capacity C1 as the voltage signal inputs of multichannel low-voltage dc power supply treatment circuit (6),
The other end of electric capacity C1, No. 3 of regulator (U1) and No. 5 pins connect power supply ground simultaneously,
No. 2 pins of regulator (U1) are connected with the negative electrode of diode D1, the Same Name of Ends of transformer (U4) primary coil simultaneously,
The other end of the anode of diode D1 and one end of electric capacity C2 and electric capacity C1 connects power supply ground simultaneously,
No. 4 pins of regulator (U1) are connected with No. 8 pins of the other end of electric capacity C2, the different name end of transformer (U4) primary coil and switching voltage capacity commutator (U3) simultaneously,
No. 4 pins of regulator (U1) as the output of+5V power supply,
The different name end of transformer (U4) secondary coil is connected with the anode of diode D2, and the negative electrode of diode D2 is connected with the positive pole of one end of electric capacity C3, No. 2 pins of step-down controller (U2) and polar capacitor C7 simultaneously,
The center tap of transformer (U4) secondary coil is connected with the other end of electric capacity C3 and one end of electric capacity C4 simultaneously, and the center tap of transformer (U4) secondary coil connects power supply ground,
The negative electrode of the terminating diode D3 of the same name of transformer (U4) secondary coil, the anode of diode D3 connects the other end of electric capacity C4,
The anode of diode D3 as the output of-12V power supply,
The negative electrode of diode D2 as the output of-12V power supply,
No. 2 pins of switching voltage capacity commutator (U3) connect the positive pole of polar capacitor C5, and the negative pole of polar capacitor C5 connects No. 4 pins of switching voltage capacity commutator (U3),
No. 3 pins of switching voltage capacity commutator (U3) connect the negative pole of polar capacitor C6, and No. 3 pins of switching voltage capacity commutator (U3) connect power supply ground,
The positive pole of polar capacitor C6 connects No. 5 pins of switching voltage capacity commutator (U3),
No. 6 pins of switching voltage capacity commutator (U3) connect power supply ground,
No. 5 pins of switching voltage capacity commutator (U3) as the output of-5V power supply,
No. 6 pins of step-down controller (U2) are connected with the negative pole of the negative pole of polar capacitor C7, the positive pole of voltage stabilizing didoe D4 and polar capacitor C9 simultaneously, and the negative pole of polar capacitor C9 connects power supply ground,
No. 8 pins of step-down controller (U2) are connected with one end of the negative pole of voltage stabilizing didoe D4, one end of inductance L 1 and electric capacity C8 simultaneously,
No. 1 pin of step-down controller (U2) is connected with the other end of electric capacity C8,
No. 4 pins of step-down controller (U2) are connected with the other end of inductance L 1,
The other end of inductance L 1 is as the output of+3.3V power supply.
2. carried charge according to claim 1 detects lithium battery multichannel low-voltage DC origin system, it is characterized in that, the magnetic core air gap of described transformer is 1.7mm, and the number of turn of transformer (U4) primary coil is 12 circles, the diameter of transformer (U4) primary coil is 0.071mm, the number of turn of transformer (U4) secondary coil is 30 circles, and the diameter of transformer (U4) secondary coil is 0.112mm.
3. carried charge according to claim 1 detects lithium battery multichannel low-voltage DC origin system, and it is characterized in that, described control circuit (3) comprises main control circuit, inductance L 2 and inductance L 3,
Described main control circuit adopts C8051F020 type chip microcontroller,
One end of described inductance L 2 as the data signal input of control circuit (3),
The other end of inductance L 2 is connected with the data signal input of main control circuit and one end of inductance L 3 simultaneously, another termination power ground of inductance L 3,
The display output of main control circuit as the display output of control circuit (3),
The voice signal output of main control circuit is as the voice signal output of control circuit (3).
4. adopt carried charge according to claim 3 to detect the detection method of quantity of electricity of lithium battery multichannel low-voltage DC origin system realization, it is characterized in that, the detailed process of the method is:
C8051F020 type single-chip microcomputer inside is embedded with the fit equation module of battery electric quantity,
First, the initialization of C8051F020 type single-chip microcomputer, by C8051F020 type single-chip microcomputer to display screen (4) initialization, the A/D initialization of register of this C8051F020 type single-chip microcomputer inside, open A/D register, A/D register waits for the sampled signal that sample circuit (2) exports, the wait sampled signal that A/D register is real-time
After A/D register receives sampled signal, this sampled signal is read, and after A/D conversion is carried out to sampled signal, send into fit equation module and carry out matching, fitting result is exported to display screen (4), shown by display screen (4)
When the electricity of fitting result is less than 10%, by sound circuit (5), voice broadcast is carried out to current residual electricity,
When the electricity of fitting result is more than or equal to 10%, complete the detection of this sampled signal.
5. employing carried charge according to claim 4 detects the detection method of quantity of electricity that lithium battery multichannel low-voltage DC origin system realizes, and it is characterized in that, the initialized idiographic flow of C8051F020 type single-chip microcomputer is:
Start, forbid house dog, allow crossbar configuration register work, each I/O mouth of C8051F020 type single-chip microcomputer is configured, and its external crystal-controlled oscillation is configured, complete the initialization of C8051F020 type single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510274679.8A CN104821634A (en) | 2015-05-26 | 2015-05-26 | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510274679.8A CN104821634A (en) | 2015-05-26 | 2015-05-26 | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104821634A true CN104821634A (en) | 2015-08-05 |
Family
ID=53731844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510274679.8A Pending CN104821634A (en) | 2015-05-26 | 2015-05-26 | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104821634A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510841A (en) * | 2015-12-30 | 2016-04-20 | 中国科学院深海科学与工程研究所 | System for online monitoring and managing electric quantity of underwater equipment power supply |
| CN105871040A (en) * | 2016-05-18 | 2016-08-17 | 深圳宝砾微电子有限公司 | AC (alternating current)-DC (direct current) flyback charging circuit and charger |
| CN106898557A (en) * | 2017-03-03 | 2017-06-27 | 中芯长电半导体（江阴）有限公司 | It is integrated with the method for packing of the packaging part of power transmission system |
| CN112969930A (en) * | 2018-11-08 | 2021-06-15 | 标致雪铁龙汽车股份有限公司 | Suppression device for a switching element with a monitored leakage current at the current output of a device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202134935U (en) * | 2011-07-13 | 2012-02-01 | 李小生 | Multi-position charger |
| US20140042984A1 (en) * | 2012-08-08 | 2014-02-13 | Fujitsu Limited | Electronic apparatus and charging control method |
| CN203933429U (en) * | 2014-03-05 | 2014-11-05 | 象山元明光电科技有限公司 | The balanced output of multichannel adaptive power 50V DC power supply |
| CN204205999U (en) * | 2014-11-07 | 2015-03-11 | 大洋电机新动力科技有限公司 | A kind of power circuit of electric vehicle motor controller |
| US20150137597A1 (en) * | 2010-10-15 | 2015-05-21 | Nextek Power Systems Inc. | Arrangement for and method of dynamically managing electrical power between an electrical power source and an electrical load |
-
2015
- 2015-05-26 CN CN201510274679.8A patent/CN104821634A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150137597A1 (en) * | 2010-10-15 | 2015-05-21 | Nextek Power Systems Inc. | Arrangement for and method of dynamically managing electrical power between an electrical power source and an electrical load |
| CN202134935U (en) * | 2011-07-13 | 2012-02-01 | 李小生 | Multi-position charger |
| US20140042984A1 (en) * | 2012-08-08 | 2014-02-13 | Fujitsu Limited | Electronic apparatus and charging control method |
| CN203933429U (en) * | 2014-03-05 | 2014-11-05 | 象山元明光电科技有限公司 | The balanced output of multichannel adaptive power 50V DC power supply |
| CN204205999U (en) * | 2014-11-07 | 2015-03-11 | 大洋电机新动力科技有限公司 | A kind of power circuit of electric vehicle motor controller |
Non-Patent Citations (3)
| Title |
|---|
| 张京: "基于CAN3705和LM2596的锂电池充放电系统", 《电子技术与软件工程》 * |
| 李福伟: "基于SOC单片机C8051F022的蓄电池剩余电量的测量", 《电源技术应用》 * |
| 陈树成: "便携式可充电多路输出电源设计", 《通信电源技术》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510841A (en) * | 2015-12-30 | 2016-04-20 | 中国科学院深海科学与工程研究所 | System for online monitoring and managing electric quantity of underwater equipment power supply |
| CN105871040A (en) * | 2016-05-18 | 2016-08-17 | 深圳宝砾微电子有限公司 | AC (alternating current)-DC (direct current) flyback charging circuit and charger |
| CN106898557A (en) * | 2017-03-03 | 2017-06-27 | 中芯长电半导体（江阴）有限公司 | It is integrated with the method for packing of the packaging part of power transmission system |
| CN112969930A (en) * | 2018-11-08 | 2021-06-15 | 标致雪铁龙汽车股份有限公司 | Suppression device for a switching element with a monitored leakage current at the current output of a device |
| CN112969930B (en) * | 2018-11-08 | 2024-02-20 | 标致雪铁龙汽车股份有限公司 | Suppression device for a device current output with a switching element for monitoring leakage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI243530B (en) | Zero-voltage switching push-pull converter | |
| CN104821634A (en) | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same | |
| CN106533152B (en) | A kind of device and method improving Boost three-level converter PF | |
| CN110995025A (en) | Switching power supply circuit | |
| CN103580290A (en) | Weak energy collecting and control circuit | |
| CN102629825A (en) | Circuit structure of realizing synchronous buck-type charging and boost-type power supply by using single inductor | |
| CN203617902U (en) | Integrated buck-flyback type high power factor constant current circuit and device | |
| CN105763035A (en) | Method and circuit for improving low-temperature starting capacity | |
| WO2022100269A1 (en) | Power supply device, circuit control method and power supply system | |
| CN205596013U (en) | Improve circuit of cold -starting ability | |
| CN213243835U (en) | Half-bridge bidirectional isolation type AC-DC converter | |
| CN203747515U (en) | Subtle-energy collection control circuit | |
| CN109194143A (en) | A kind of isolation detection route of digital switch power supply medium-long range switching signal | |
| CN102185358A (en) | Simple and practical movable uninterruptible power supply | |
| CN102299629A (en) | Power supply control method and power supply device for direct-current high-voltage power supply | |
| US20230170783A1 (en) | Power supply device, circuit control method, and power supply system | |
| CN105375761A (en) | Fly-back switching power supply and loop control circuit thereof | |
| CN109450252A (en) | A kind of three rail power generating devices | |
| CN209134301U (en) | A kind of three rail power generating devices | |
| CN110071574A (en) | Electronic access control system based on uninterruptible power supply | |
| CN108879919A (en) | For the piezoelectricity Electromagnetic heating energy accumulator energy management circuit of wireless sensor power supply | |
| CN202004673U (en) | Step-down power circuit architecture | |
| CN208939830U (en) | A kind of isolation detection route of digital switch power supply medium-long range switching signal | |
| CN209659002U (en) | Electronic access control system based on uninterruptible power supply | |
| CN209282906U (en) | Power circuit and electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150805 |
|
| WD01 | Invention patent application deemed withdrawn after publication |