CN201638098U - Portable power-frequency constant current source device - Google Patents
Portable power-frequency constant current source device Download PDFInfo
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- CN201638098U CN201638098U CN 201020046028 CN201020046028U CN201638098U CN 201638098 U CN201638098 U CN 201638098U CN 201020046028 CN201020046028 CN 201020046028 CN 201020046028 U CN201020046028 U CN 201020046028U CN 201638098 U CN201638098 U CN 201638098U
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Abstract
The utility model relates to a portable power-frequency constant current source device which comprises a control circuit, an LED with a touch screen, a constant current output circuit, an output current sampling circuit, a lithium battery and a DC-DC switching circuit, wherein the LCD with the touch screen is connected with the control circuit in a double-way manner; the output end of the control circuit is connected with the input end of the constant current output circuit; the output current sampling circuit is connected with load in series, and then is connected with the output end of the constant current output circuit; the output end of the output current sampling circuit is connected with the control circuit and the corresponding input end of the constant current output circuit respectively; the lithium battery is connected with the control circuit, the constant current output circuit and the DC-DC switching circuit respectively for providing power; and the DC-DC switching circuit is connected with control circuit and the LCD with the touch screen respectively for providing power. The portable power-frequency constant current source device has the benefits of small volume, light weight and easy carrying, can set the amplitude and frequency of the output current, and provides convenience for the maintenance work of electronic subsystems.
Description
Technical field
The utility model relates to a kind of portable power-frequency constant current source device, belongs to the constant current source technical field, is applicable to the electric system maintenance.
Background technology
In the electric system service work, often need reliable and stable constant current source.What constant-current device application at present was maximum is hand or digital interchange constant flow regulation equipment, adopts an automatic coupling voltage regulator usually, controls output current by number or digital control regulation voltage.Though present digital constant current source is less than the volume of hand constant current source, is not easy to carry, moreover needs external power supply.
The utility model content
Technical problem to be solved in the utility model provides a kind of volume portable power-frequency constant current source device little, in light weight, easy to use.
The technical scheme that its technical matters that solves the utility model adopts:
The utility model includes LCD, constant current output circuit, output current sample circuit, lithium battery and the DC-DC change-over circuit of control circuit, band touch-screen; The LCD of described band touch-screen is connected with control circuit is two-way, the input end of the output termination constant current output circuit of described control circuit, described output current sample circuit and the output terminal that is connected on described constant current output circuit after load is connected; The output terminal of described output current sample circuit connects the respective input of described control circuit and constant current output circuit respectively; Described lithium battery is respectively described control circuit, constant current output circuit and DC-DC change-over circuit power supply is provided, and the LCD that described DC-DC change-over circuit is respectively described control circuit and band touch-screen provides power supply.
The utility model also includes charger.
The beneficial effects of the utility model be volume little, in light weight, be easy to carry, can set output current amplitude and frequency flexibly, for the power subsystem service work provides convenience.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of control circuit.
Fig. 3 is the circuit theory diagrams of constant current output circuit and output current sample circuit.
Fig. 4 is the circuit theory diagrams of DC-DC change-over circuit.
Embodiment
By the embodiment shown in Fig. 1-4 as can be known, it includes LCD, constant current output circuit, output current sample circuit, lithium battery and the DC-DC change-over circuit of control circuit, band touch-screen; The LCD of described band touch-screen is connected with control circuit is two-way, the input end of the output termination constant current output circuit of described control circuit, described output current sample circuit and the output terminal that is connected on described constant current output circuit after load is connected; The output terminal of described output current sample circuit connects the respective input of described control circuit and constant current output circuit respectively; Described lithium battery is respectively described control circuit, constant current output circuit and DC-DC change-over circuit power supply is provided, and the LCD that described DC-DC change-over circuit is respectively described control circuit and band touch-screen provides power supply.
Present embodiment also includes charger.
Described lithium battery is made up of the first lithium battery E1 to the, three lithium battery E3; The positive terminal of the described first lithium battery E1 is VB, its minus earth; The described second lithium battery E2 is composed in series positive and negative voltage source by two lithium batteries, and its positive voltage terminal is VP+, and its negative voltage side is VP-, the node ground connection of two lithium batteries of described series connection; Described the 3rd lithium battery E3 is the backup battery of single-chip microcomputer U1.
Described control circuit is made up of single-chip microcomputer U1 and peripheral cell thereof, constant current output drive signal treatment circuit, output current sampled signal treatment circuit, lithium battery voltage observation circuit;
Described single-chip microcomputer U1 adopts the mixed signal single-chip microcomputer, and its model is C8051F410, and the peripheral cell of described single-chip microcomputer U1 is made up of crystal Y1-Y2, capacitor C 1-C7, resistance R 1, inductance L 1, socket J1 and jumper switch JP1; Described socket J1 is single-chip microcomputer U1 and the gang socket of the LCD of band touch-screen, inductance L 1 is connected on the series filtering circuit that capacitor C 2 is formed+5V and ground between, the node of inductance L 1 and capacitor C 2 connects 1 pin and 8 pin of single-chip microcomputer U1; The 3rd lithium battery E3 is connected between 3 pin and ground of single-chip microcomputer U1; Crystal Y1 is connected between 4 pin and 5 pin of single-chip microcomputer U1 by jumper switch JP1;
Described constant current output drive signal treatment circuit is made up of second order active low-pass filter and digital regulation resistance U3; Described second order active low-pass filter is made up of resistance R 2-R4, capacitor C 8-C10, integrated package U2B; Output terminal 17 pin of described single-chip microcomputer U1 connect positive input terminal 5 pin of integrated package U2B successively through resistance R 3, resistance R 4, output terminal 7 pin of described integrated package U2B connect input end 5 pin of digital regulation resistance U3, and 7 pin of integrated package U2B are connected with 6 pin; Output terminal 6 pin of described digital regulation resistance U3 are the input end A ' that the A point connects constant current output circuit, and the 1-3 pin of described digital regulation resistance U3 connects 15 pin of single-chip microcomputer U1,12 pin, 14 pin respectively;
Described output current sampled signal treatment circuit is made up of gain-programmed amplifier U4 and two adding circuits; First adding circuit is made up of resistance R 5-R7, capacitor C 12, resistance R 6 be connected on after resistance R 7 is connected+5V and ground between, one end B ' of resistance R 5 meets the output terminal B of described output current sample circuit, input end 2 pin of the described gain-programmed amplifier U4 of another termination of resistance R 5, the node of resistance R 6 and resistance R 7 connects input end 2 pin of gain-programmed amplifier U4, and capacitor C 12 is in parallel with resistance R 7; Second adding circuit that produces reference signal is made up of resistance R 8-R10, impact damper U2A, resistance R 8 be connected on after resistance R 9 is connected+5V and ground between, the node of resistance R 8 and resistance R 9 connects positive input terminal 3 pin of impact damper U2A, output terminal 1 pin of impact damper U2A connects another input end 3 pin of gain-programmed amplifier U4, and 1 pin of impact damper U2A is connected with 2 pin; Resistance R 10 is in parallel with resistance R 9; The control input end 5-7 pin of gain-programmed amplifier U4 connects 16 pin, 14 pin, 12 pin of single-chip microcomputer U1 respectively;
Described lithium battery voltage observation circuit is made up of first to the 3rd observation circuit, the voltage of the described first monitoring circuit monitors VB, and it is made up of resistance R 12-R13, capacitor C 14; Resistance R 12 be connected between VB and the ground after resistance R 13 is connected, resistance R 12 and the node of resistance R 13 connect 20 pin of single-chip microcomputer U1, capacitor C 14 is in parallel with resistance R 13; The described second monitoring circuit monitors VP-and+voltage of 5V, it is made up of resistance R 27-R29, capacitor C 24; Resistance R 27-R29 is star-like connection, and its node connects 21 pin of single-chip microcomputer U1, another termination+5V of resistance R 27, and another termination VP-of resistance R 28, the other end ground connection of resistance R 29, capacitor C 24 is in parallel with resistance R 29; The voltage of described the 3rd monitoring circuit monitors VP+, it is made up of resistance R 30-R31, capacitor C 25; Resistance R 30 be connected between VP+ and the ground after resistance R 31 is connected, resistance R 30 and the node of resistance R 31 connect 22 pin of single-chip microcomputer U1, capacitor C 25 is in parallel with resistance R 31.
Described constant current output circuit is made up of great current operation amplifier U5 and peripheral cell resistance R 14-R17, capacitor C 15-C19, diode D1-D2, the second lithium battery E2, K switch 2-K3, output terminal 6 pin that the input end 4 foot meridian capacitor C15 of described great current operation amplifier U5 meet digital regulation resistance U3 are the A point, and output terminal 1 pin of great current operation amplifier U5 is connected the back and is the continuous current output terminal with 2 pin; The V+ end of great current operation amplifier U5 is held through the VP+ that K switch 2 meets the second lithium battery E2, and the V-end of great current operation amplifier U5 connects the VP-end of the second lithium battery E2 through K switch 3; Capacitor C 17 is connected between the V-end and ground of great current operation amplifier U5, and capacitor C 18 is connected between the V+ end and ground of great current operation amplifier U5; The output compensation branch road that resistance R 17 and capacitor C 19 are composed in series is connected between output terminal 1 pin and ground of great current operation amplifier U5, and diode D1 is connected between 1 pin and 5 pin of great current operation amplifier U5; Diode D2 is connected between 1 pin and 10 pin of great current operation amplifier U5; One end ground connection of resistance R 14, its other end is connected with the node of capacitor C 15 with 4 pin of great current operation amplifier U5; Resistance R 15 is connected between 6 pin and 8 pin of great current operation amplifier U5 with the output overcurrent protection threshold circuit that capacitor C 16 backs in parallel are formed;
6 pin of described great current operation amplifier U5 connect the VP-end of the second lithium battery E2.
Described output current sample circuit is made up of sampling resistor R18; Sampling resistor R18 be connected between output terminal 1 pin and ground of great current operation amplifier U5 after load RL connects, a road of the Node B of sampling resistor R18 and load RL meets the input end B ' of first adding circuit, and its another road connects 3 pin of great current operation amplifier U5.
Described DC-DC change-over circuit is made up of DC-DC conversion and control chip U6 and peripheral cell resistance R 19-R21, capacitor C 21-C22, the first lithium battery E1, K switch 1, input filter circuit, output filter circuit, power indicating circuit, feedback circuit; Described input filter circuit is made up of inductance L 2, capacitor C 20, the minus earth of the first lithium battery E1; Be connected on the two ends of the first lithium battery E1 after K switch 1, inductance L 2, capacitor C 20 are connected successively, the node of inductance L 2 and capacitor C 20 connects input end 7 pin of DC-DC conversion chip U6;
Described output filter circuit is made up of diode D3, inductance L 3, capacitor C 23; Inductance L 3 be connected between output terminal 14 pin and ground of DC-DC conversion chip U6 after capacitor C 23 is connected, diode D3 is connected between 14 pin and ground of DC-DC conversion chip U6; Output terminal 14 pin of DC-DC conversion chip U6 link to each other with 15 pin;
Described power indicating circuit is made up of resistance R 22-R23, LED 1; Resistance R 22, resistance R 23, LED 1 back of connecting successively is in parallel with capacitor C 23, and the node of resistance R 22 and resistance R 23 is+output terminal of 5V;
Described feedback circuit is made up of resistance R 24-R26, is connected on after resistance R 24-R26 connects successively between the node and ground of inductance L 3 and capacitor C 23, and the node of resistance R 25 and resistance R 26 connects 2 pin of DC-DC conversion chip U6;
The bootstrapping branch road that resistance R 21 and capacitor C 22 are composed in series is connected between 15 pin and 16 pin of DC-DC conversion chip U6;
Resistance R 20 is connected between 3 pin and 6 pin of DC-DC conversion chip U6 with the frequency setting loop that capacitor C 21 backs in parallel are formed, and the 3-5 pin of DC-DC conversion chip U6 is connected to each other.
The course of work of present embodiment:
1, the course of work (see figure 2) of control circuit:
Control circuit shown in Figure 2 is a core with mixed signal single-chip microcomputer U1 (C8051F410), utilizes its built-in DAC and ADC to realize waveform generation and measurement function respectively.The sinusoidal signal that DAC produces is with P0.0 (17th pin) output of current forms from U1, be converted to sine voltage signal through resistance R 2, the second order active low-pass filter filtering noise of being made up of R3, R4, C9, C10 and U2B obtains clean sine voltage signal then.This signal obtains the constant current source drive signal through digital regulation resistance U3 (MCP41010) dividing potential drop, and intrinsic standoff ratio by the control of SPI interface, realizes adjusting drive signal amplitude by U1, thus the purpose of control constant current source output current amplitude.From the AC signal of sampling resistor R18 through first adding circuit that R5-R7 forms with+migrated to the DC level of 1V after 5V mixes.The DC voltage that second adding circuit of being made up of R5-R10 produces 1V is connected to the 3rd pin of gain-programmed amplifier U4 as the reference signal after operational amplifier U2A buffering.Like this, current detection signal by R11 and C13 filtering, is delivered to the input end AIN1 (the 19th pin) of the built-in ADC of U1 at last after U4 amplifies.Can calculate current value and deliver to the LCD demonstration by the AD transformation result.The voltage VB of the first lithium battery E1 is connected to the AIN2 input end of the built-in ADC of U11 after R12, R13 dividing potential drop, single-chip microcomputer U1 can monitor the voltage of the first lithium battery E1, provides low capacity prompt.J1 is the interface socket of the LCD of connecting band touch-screen, comprises SPI interface signal and 5V power supply.
2, the course of work (see figure 3) of constant current output circuit and output current sample circuit:
In Fig. 3, add that by great current operation amplifier U5 (OPA549S) peripheral components constitutes.The voltage signal of input is added to the positive input terminal (the 4th pin) of U5 after the Hi-pass filter of C15 and R14 formation removes direct current signal.The output of U5 provides electric current to load RL, and this electric current arrives ground by sampling resistor R18.The R18 upper end is connected to the negative input end (the 3rd pin) of U5, realizes the constant current source function.The R18 upper end is connected to the input end B ' of output current sampled signal treatment circuit simultaneously, and R15 and C16 set the output overcurrent protection threshold value of U5.D1 and D2 are as the output port protection, and R17 and C19 are the output compensating circuit.C17-C18 is an electrical power by-pass electric capacity.
3, the course of work (see figure 4) of DC-DC change-over circuit:
The DC-DC change-over circuit uses the voltage transitions of the first lithium battery E1 for the LCD that is fit to control circuit and band touch-screen 5V voltage, circuit shown in Figure 4 is a core with DC-DC conversion and control chip U6 (NCP3173PW), works in the BUCK pattern.The first lithium battery E1 voltage is added to the input filter circuit that is made of L2, C20 through K switch 1, is connected to the input end (the 7th pin) of U6 then.Obtain direct current 5V power supply behind the output filter circuit of the pwm switching signal of U6 output via D3, L3, C23 formation, output voltage values is by the parameter decision of feedback branch R24-R26.R26 sets the overcurrent protection threshold value, and R20 and C21 set oscillation frequency, and R21 and C22 constitute the bootstrapping branch road.The effect of R22 is debugging for convenience, and R23 and LED1 form power indicating circuit.
Claims (7)
1. a portable power-frequency constant current source device is characterized in that described device includes LCD, constant current output circuit, output current sample circuit, lithium battery and the DC-DC change-over circuit of control circuit, band touch-screen; The LCD of described band touch-screen is connected with control circuit is two-way, the input end of the output termination constant current output circuit of described control circuit, described output current sample circuit and the output terminal that is connected on described constant current output circuit after load is connected; The output terminal of described output current sample circuit connects the respective input of described control circuit and constant current output circuit respectively; Described lithium battery is respectively described control circuit, constant current output circuit and DC-DC change-over circuit power supply is provided, and the LCD that described DC-DC change-over circuit is respectively described control circuit and band touch-screen provides power supply.
2. portable power-frequency constant current source device according to claim 1 is characterized in that described device also includes charger.
3. portable power-frequency constant current source device according to claim 2 is characterized in that described lithium battery is made up of the first lithium battery E1 to the, three lithium battery E3; The positive terminal of the described first lithium battery E1 is VB, its minus earth; The described second lithium battery E2 is composed in series positive and negative voltage source by two lithium batteries, and its positive voltage terminal is VP+, and its negative voltage side is VP-, the node ground connection of two lithium batteries of described series connection; Described the 3rd lithium battery E3 is the backup battery of single-chip microcomputer U1.
4. portable power-frequency constant current source device according to claim 3 is characterized in that described control circuit is made up of single-chip microcomputer U1 and peripheral cell thereof, constant current output drive signal treatment circuit, output current sampled signal treatment circuit, lithium battery voltage observation circuit;
Described single-chip microcomputer U1 adopts the mixed signal single-chip microcomputer, and its model is C8051F410, and the peripheral cell of described single-chip microcomputer U1 is made up of crystal Y1-Y2, capacitor C 1-C7, resistance R 1, inductance L 1, socket J1 and jumper switch JP1; Described socket J1 is single-chip microcomputer U1 and the gang socket of the LCD of band touch-screen, inductance L 1 is connected on the series filtering circuit that capacitor C 2 is formed+5V and ground between, the node of inductance L 1 and capacitor C 2 connects 1 pin and 8 pin of single-chip microcomputer U1; The 3rd lithium battery E3 is connected between 3 pin and ground of single-chip microcomputer U1; Crystal Y1 is connected between 4 pin and 5 pin of single-chip microcomputer U1 by jumper switch JP1;
Described constant current output drive signal treatment circuit is made up of second order active low-pass filter and digital regulation resistance U3; Described second order active low-pass filter is made up of resistance R 2-R4, capacitor C 8-C10, integrated package U2B; Output terminal 17 pin of described single-chip microcomputer U1 connect positive input terminal 5 pin of integrated package U2B successively through resistance R 3, resistance R 4, output terminal 7 pin of described integrated package U2B connect input end 5 pin of digital regulation resistance U3, and 7 pin of integrated package U2B are connected with 6 pin; Output terminal 6 pin of described digital regulation resistance U3 are the input end A ' that the A point connects constant current output circuit, and the 1-3 pin of described digital regulation resistance U3 connects 15 pin of single-chip microcomputer U1,12 pin, 14 pin respectively;
Described output current sampled signal treatment circuit is made up of gain-programmed amplifier U4 and two adding circuits; First adding circuit is made up of resistance R 5-R7, capacitor C 12, resistance R 6 be connected on after resistance R 7 is connected+5V and ground between, one end B ' of resistance R 5 meets the output terminal B of described output current sample circuit, input end 2 pin of the described gain-programmed amplifier U4 of another termination of resistance R 5, the node of resistance R 6 and resistance R 7 connects input end 2 pin of gain-programmed amplifier U4, and capacitor C 12 is in parallel with resistance R 7; Second adding circuit that produces reference signal is made up of resistance R 8-R10, impact damper U2A, resistance R 8 be connected on after resistance R 9 is connected+5V and ground between, the node of resistance R 8 and resistance R 9 connects positive input terminal 3 pin of impact damper U2A, output terminal 1 pin of impact damper U2A connects another input end 3 pin of gain-programmed amplifier U4, and 1 pin of impact damper U2A is connected with 2 pin; Resistance R 10 is in parallel with resistance R 9; The control input end 5-7 pin of gain-programmed amplifier U4 connects 16 pin, 14 pin, 12 pin of single-chip microcomputer U1 respectively;
Described lithium battery voltage observation circuit is made up of first to the 3rd observation circuit, the voltage of the described first monitoring circuit monitors VB, and it is made up of resistance R 12-R13, capacitor C 14; Resistance R 12 be connected between VB and the ground after resistance R 13 is connected, resistance R 12 and the node of resistance R 13 connect 20 pin of single-chip microcomputer U1, capacitor C 14 is in parallel with resistance R 13; The described second monitoring circuit monitors VP-and+voltage of 5V, it is made up of resistance R 27-R29, capacitor C 24; Resistance R 27-R29 is star-like connection, and its node connects 21 pin of single-chip microcomputer U1, another termination+5V of resistance R 27, and another termination VP-of resistance R 28, the other end ground connection of resistance R 29, capacitor C 24 is in parallel with resistance R 29; The voltage of described the 3rd monitoring circuit monitors VP+, it is made up of resistance R 30-R31, capacitor C 25; Resistance R 30 be connected between VP+ and the ground after resistance R 31 is connected, resistance R 30 and the node of resistance R 31 connect 22 pin of single-chip microcomputer U1, capacitor C 25 is in parallel with resistance R 31.
5. portable power-frequency constant current source device according to claim 4, it is characterized in that described constant current output circuit is made up of great current operation amplifier U5 and peripheral cell resistance R 14-R17, capacitor C 15-C19, diode D1-D2, the second lithium battery E2, K switch 2-K3, output terminal 6 pin that the input end 4 foot meridian capacitor C15 of described great current operation amplifier U5 meet digital regulation resistance U3 are the A point, and output terminal 1 pin of great current operation amplifier U5 is connected the back and is the continuous current output terminal with 2 pin; The V+ end of great current operation amplifier U5 is held through the VP+ that K switch 2 meets the second lithium battery E2, and the V-end of great current operation amplifier U5 connects the VP-end of the second lithium battery E2 through K switch 3; Capacitor C 17 is connected between the V-end and ground of great current operation amplifier U5, and capacitor C 18 is connected between the V+ end and ground of great current operation amplifier U5; The output compensation branch road that resistance R 17 and capacitor C 19 are composed in series is connected between output terminal 1 pin and ground of great current operation amplifier U5, and diode D1 is connected between 1 pin and 5 pin of great current operation amplifier U5; Diode D2 is connected between 1 pin and 10 pin of great current operation amplifier U5; One end ground connection of resistance R 14, its other end is connected with the node of capacitor C 15 with 4 pin of great current operation amplifier U5; Resistance R 15 is connected between 6 pin and 8 pin of great current operation amplifier U5 with the output overcurrent protection threshold circuit that capacitor C 16 backs in parallel are formed;
6 pin of described great current operation amplifier U5 connect the VP-end of the second lithium battery E2.
6. portable power-frequency constant current source device according to claim 5 is characterized in that described output current sample circuit is made up of sampling resistor R18; Sampling resistor R18 be connected between output terminal 1 pin and ground of great current operation amplifier U5 after load RL connects, a road of the Node B of sampling resistor R18 and load RL meets the input end B ' of first adding circuit, and its another road connects 3 pin of great current operation amplifier U5.
7. portable power-frequency constant current source device according to claim 6 is characterized in that described DC-DC change-over circuit is made up of DC-DC conversion and control chip U6 and peripheral cell resistance R 19-R21, capacitor C 21-C22, the first lithium battery E1, K switch 1, input filter circuit, output filter circuit, power indicating circuit, feedback circuit; Described input filter circuit is made up of inductance L 2, capacitor C 20, the minus earth of the first lithium battery E1; Be connected on the two ends of the first lithium battery E1 after K switch 1, inductance L 2, capacitor C 20 are connected successively, the node of inductance L 2 and capacitor C 20 connects input end 7 pin of DC-DC conversion chip U6;
Described output filter circuit is made up of diode D3, inductance L 3, capacitor C 23; Inductance L 3 be connected between output terminal 14 pin and ground of DC-DC conversion chip U6 after capacitor C 23 is connected, diode D3 is connected between 14 pin and ground of DC-DC conversion chip U6; Output terminal 14 pin of DC-DC conversion chip U6 link to each other with 15 pin;
Described power indicating circuit is made up of resistance R 22-R23, LED 1; Resistance R 22, resistance R 23, LED 1 back of connecting successively is in parallel with capacitor C 23, and the node of resistance R 22 and resistance R 23 is+output terminal of 5V;
Described feedback circuit is made up of resistance R 24-R26, is connected on after resistance R 24-R26 connects successively between the node and ground of inductance L 3 and capacitor C 23, and the node of resistance R 25 and resistance R 26 connects 2 pin of DC-DC conversion chip U6;
The bootstrapping branch road that resistance R 21 and capacitor C 22 are composed in series is connected between 15 pin and 16 pin of DC-DC conversion chip U6;
Resistance R 20 is connected between 3 pin and 6 pin of DC-DC conversion chip U6 with the frequency setting loop that capacitor C 21 backs in parallel are formed, and the 3-5 pin of DC-DC conversion chip U6 is connected to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020046028 CN201638098U (en) | 2010-01-07 | 2010-01-07 | Portable power-frequency constant current source device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201020046028 CN201638098U (en) | 2010-01-07 | 2010-01-07 | Portable power-frequency constant current source device |
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| CN201638098U true CN201638098U (en) | 2010-11-17 |
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| CN 201020046028 Expired - Lifetime CN201638098U (en) | 2010-01-07 | 2010-01-07 | Portable power-frequency constant current source device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012129892A1 (en) * | 2011-03-25 | 2012-10-04 | 重庆长安汽车股份有限公司 | Power battery simulation system |
| CN101770247B (en) * | 2010-01-07 | 2012-12-19 | 国家电网公司 | Portable power-frequency constant current source device |
| CN106125813A (en) * | 2016-08-01 | 2016-11-16 | 河北大学 | A kind of high stability constant-current source of portable wide amount limit |
| CN107979124A (en) * | 2017-08-08 | 2018-05-01 | 上海裕芯电子科技有限公司 | A kind of supply self adaptation charging circuit |
-
2010
- 2010-01-07 CN CN 201020046028 patent/CN201638098U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770247B (en) * | 2010-01-07 | 2012-12-19 | 国家电网公司 | Portable power-frequency constant current source device |
| WO2012129892A1 (en) * | 2011-03-25 | 2012-10-04 | 重庆长安汽车股份有限公司 | Power battery simulation system |
| CN106125813A (en) * | 2016-08-01 | 2016-11-16 | 河北大学 | A kind of high stability constant-current source of portable wide amount limit |
| CN107979124A (en) * | 2017-08-08 | 2018-05-01 | 上海裕芯电子科技有限公司 | A kind of supply self adaptation charging circuit |
| CN107979124B (en) * | 2017-08-08 | 2024-03-22 | 上海裕芯电子科技有限公司 | Power supply self-adaptive charging circuit |
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