CN118544844A - New energy automobile battery charge control system - Google Patents
New energy automobile battery charge control system Download PDFInfo
- Publication number
- CN118544844A CN118544844A CN202310160676.6A CN202310160676A CN118544844A CN 118544844 A CN118544844 A CN 118544844A CN 202310160676 A CN202310160676 A CN 202310160676A CN 118544844 A CN118544844 A CN 118544844A
- Authority
- CN
- China
- Prior art keywords
- circuit
- module
- output
- input
- driving
- 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
- 238000007600 charging Methods 0.000 claims abstract description 58
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 238000004804 winding Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of new energy automobiles and provides a new energy automobile battery charging control system which comprises an input EMC module, a rectifying module, a driving output module, a driving control module and a power factor adjusting module, wherein the input end of the input EMC module is suitable for being connected with an external alternating current power supply, the output end of the input EMC module is connected with the input end of the rectifying module, the input end of the power factor adjusting module is connected with the output end of the rectifying module, the output end of the power factor adjusting module is connected with the input end of the driving output module so as to boost voltage and improve circuit power factor, the controlled end of the driving output module is connected with the driving control module, and the output end of the driving output module is connected with an automobile battery so as to charge the automobile battery under the control of the driving control module; the invention can effectively improve the electric energy utilization efficiency of charging the battery of the new energy automobile.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a new energy automobile battery charging control system.
Background
The new energy vehicle-mounted charger is an electric energy conversion device which is fixedly arranged on an electric vehicle and used for controlling and adjusting the charging of a vehicle power battery, an automobile battery charging control circuit is arranged in the new energy vehicle-mounted charger, the new energy vehicle-mounted charger has the capability of safely and automatically fully charging the electric vehicle power battery, charging current and voltage parameters are dynamically adjusted, civil alternating current is converted into direct current to charge the power battery, the existing vehicle battery charging control circuit generally comprises a power supply part and a charging driving control part, the power supply part converts an alternating current power supply into direct current, the charging driving control part controls the battery to output and charge, but when the existing charging control circuit outputs the alternating current through rectification and conversion, the charging power factor is lower due to the load impedance in the circuit, and the electric energy utilization rate is poor.
Disclosure of Invention
The invention solves the problem of providing a new energy automobile battery charging control system with higher electric energy utilization efficiency.
In order to solve the above problems, the present invention provides a new energy automobile battery charging control system, comprising: the power factor regulating device comprises an input EMC module, a rectifying module, a driving output module, a driving control module and a power factor regulating module, wherein the input end of the input EMC module is suitable for being connected with an external alternating current power supply, the output end of the input EMC module is connected with the input end of the rectifying module, the input end of the power factor regulating module is connected with the output end of the rectifying module, the output end of the power factor regulating module is connected with the input end of the driving output module so as to boost voltage and improve circuit power factor, the controlled end of the driving output module is connected with the driving control module, and the output end of the driving output module is connected with an automobile battery so as to charge the automobile battery under the control of the driving control module.
Further, the rectification module comprises a first rectification circuit, a second rectification circuit and a conversion power supply circuit, wherein the input ends of the first rectification circuit and the second rectification circuit are respectively connected with the output end of the input EMC module, the output end of the first rectification circuit is connected with the input end of the power factor regulating module to supply power for the charging main loop, the output end of the second rectification circuit is connected with the input end of the conversion power supply circuit, and the output end of the conversion power supply circuit is respectively connected with the power ends of the driving control module and the power factor regulating module to provide working power for chips in the driving control module and the power factor regulating module.
Further, the power factor adjusting module comprises a first PFC driving chip, a first differential amplifying circuit, a first MOS tube, a first inductor, a first diode, a first charging capacitor group, a current feedback circuit and a voltage feedback circuit, wherein the PWM output end of the first PFC driving chip is connected with the grid electrode of the first MOS tube through the first differential amplifying circuit, the source electrode of the first MOS tube is grounded, the drain electrode of the first MOS tube is connected with the second end of the first inductor, the first end of the first inductor is connected with the output end of the first rectifying circuit, the first end of the first diode is connected with the second end of the first inductor, the second end of the first diode is connected with the input end of the driving output module, the first end of the first charging capacitor group is connected with the second end of the first diode, the input end of the current feedback circuit is connected with the source electrode of the first MOS tube, the output end of the first PFC driving chip is connected with the first PFC driving chip, and the input end of the voltage feedback circuit is connected with the first diode.
Further, the power factor adjusting module further comprises a peak value absorption circuit and a coil bypass circuit, wherein the peak value absorption circuit is connected with the grid electrode of the first MOS tube, the first end of the coil bypass circuit is connected with the first end of the first inductor, and the second end of the coil bypass circuit is connected with the second end of the first diode.
Further, the driving output module comprises a driving circuit and a first transformer, the input end of the driving circuit is connected with the output end of the power factor adjusting module, the controlled end of the driving circuit is connected with the driving control module, the output end of the driving circuit is connected with the main winding of the first transformer, the secondary winding of the first transformer charges the automobile battery through the first rectifying output circuit, and the auxiliary winding of the first transformer is connected with the driving control module through the second rectifying output circuit.
Further, the driving circuit comprises a second differential amplifying circuit, a third differential amplifying circuit, a second MOS tube, a third MOS tube and a second inductor, wherein the grid electrode of the second MOS tube is connected with the first control end of the driving control module through the second differential amplifying circuit, the drain electrode of the second MOS tube is connected with the output end of the power factor adjusting module, the source electrode of the second MOS tube is connected with the first end of the second inductor, the grid electrode of the third MOS tube is connected with the second control end of the driving control module through the third differential amplifying circuit, the drain electrode of the third MOS tube is connected with the first end of the second inductor, the source electrode of the third MOS tube is grounded, the second end of the second inductor is connected with the first end of the main winding of the first transformer, and the second end of the main winding of the first transformer is grounded.
Further, the driving control module comprises a first output control chip, a voltage-stabilizing power supply circuit, a control loop soft start circuit and a delay circuit, wherein the input end of the voltage-stabilizing power supply circuit is connected with the conversion power supply circuit, the output end of the voltage-stabilizing power supply circuit is connected with the first output control chip, the input end of the delay circuit is connected with a delay signal end of the first output control chip through a delay capacitor, the delay capacitor is used for controlling delay time length, the first input end of the control loop soft start circuit is connected with the voltage-stabilizing power supply circuit, the second input end of the control loop soft start circuit is connected with the second rectification output circuit, and the output end of the control loop soft start end of the first output control chip is connected.
Further, the drive control module further comprises a constant current loop control circuit and a constant voltage loop control circuit, the constant current loop control circuit comprises a first current detection amplifier, a first comparator, a first triode, a first optocoupler and a first operational amplifier, a current sampling resistor is connected between two input ends of the first current detection amplifier, the sampling resistor is arranged between a negative output end of the first rectifying output circuit and a negative electrode of the automobile battery, an output end of the first current detection amplifier is respectively connected with the first operational amplifier and a positive input end of the first comparator, a negative electrode of the first comparator is connected with a reference voltage, an output end of the first comparator is connected with a base electrode of the first triode, an emitter of the first triode is connected with the first operational amplifier, a collector of the first optocoupler is connected with a transmitting end of the first optocoupler, and a receiving end of the first optocoupler is connected with the first output control chip.
Further, the constant voltage loop control circuit comprises a constant voltage control chip, a follower circuit, a comparison conversion circuit and a second optocoupler, wherein two input ends of the constant voltage control chip are respectively connected with two ends of a second diode through a group of voltage dividing circuits, an anode of the second diode is connected with a positive output end of the first rectification output circuit, a cathode of the second diode is connected with an anode of the automobile battery, an output end of the constant voltage control chip is connected with an input end of the follower circuit, an output end of the follower circuit is connected with an input end of the comparison conversion circuit, an output end of the comparison conversion circuit is connected with a transmitting end of the second optocoupler, and a receiving end of the second optocoupler is connected with the first output control chip.
Further, the automobile battery charging control circuit further comprises a main soft start circuit and a first thermistor, the output end of the input EMC module is connected with the input end of the rectifying module through the first thermistor, the main soft start circuit comprises a second triode, a first relay and a third diode, the base electrode of the second triode is connected with the output end of the delay circuit, the emitter is grounded, the base electrode is connected with a working power supply through the coil of the first relay, the third diode is connected with two ends of the coil of the first relay in parallel, and the normally open contact of the first relay is connected with two ends of the first thermistor in parallel.
Compared with the prior art, the invention has the beneficial effects that:
When the power supply is used, an external alternating current power supply is input into the rectifying module through the input EMC module, the input EMC module can improve the anti-interference capability of the power supply, the power factor adjusting module can adjust the rectified power supply, so that the power supply current output to the driving output module is continuous, the voltage and the current phase of the power supply are improved, the ratio of the active power of charging the automobile battery is higher, the power factor is higher when the driving output module charges the automobile battery under the control of the driving control module, and the electric energy utilization efficiency of charging the new energy automobile battery is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the overall principle of the embodiment of the present invention;
FIG. 2 is a schematic diagram of a rectifying module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power factor adjusting module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a driving control module according to an embodiment of the invention.
Reference numerals illustrate:
1-input EMC module; a 2-rectification module; 21-a first rectifying circuit; 22-a second rectifying circuit; 23-converting the power supply circuit; 3-a power factor adjustment module; 4-driving an output module; 5-a drive control module; 6-a main soft start circuit; 51-a first output control chip; 52-a voltage-stabilizing power supply circuit; 53-control loop soft start circuit; 54-delay circuit; 55-a constant current loop control circuit; 56-constant voltage loop control circuit.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or illustrated embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.
As shown in fig. 1, the present invention provides a new energy automobile battery charging control system, comprising: the power factor adjusting device comprises an input EMC module 1, a rectifying module 2, a driving output module 4, a driving control module 5 and a power factor adjusting module 3, wherein the input end of the input EMC module 1 is suitable for being connected with an external alternating current power supply, the output end of the input EMC module 1 is connected with the input end of the rectifying module 2, the input end of the power factor adjusting module 3 is connected with the output end of the rectifying module 2, the output end of the input factor adjusting module is connected with the input end of the driving output module 4 so as to boost voltage and improve circuit power factor, the controlled end of the driving output module 4 is connected with the driving control module 5, and the output end of the driving output module 4 is connected with an automobile battery so as to charge the automobile battery under the control of the driving control module 5.
When the power supply is used, an external alternating current power supply is input into the rectifying module 2 through the input EMC module 1, the anti-interference capability of the power supply can be improved through the input EMC module 1, the power factor adjusting module 3 can adjust the rectified power supply, so that the power supply current output to the driving output module 4 is continuous, the voltage and the current phase of the power supply are improved, the ratio of the active power for charging the automobile battery is higher, the power factor is higher when the driving output module 4 charges the automobile battery under the control of the driving control module 5, the electric energy utilization efficiency for charging the new energy automobile battery is effectively improved, and the EMC refers to electromagnetic compatibility; the input EMC module 1 can improve the anti-electromagnetic interference capability, as shown in fig. 3, the input EMC module 1 is composed of a capacitor C1, a common-mode inductor L1, a capacitor C2 and a common-mode inductor L2, so that the stability of the input ac power supply can be effectively ensured.
In one embodiment of the present invention, the rectifying module 2 includes a first rectifying circuit 21, a second rectifying circuit 22, and a switching power supply circuit 23, input ends of the first rectifying circuit 22 and the second rectifying circuit 22 are respectively connected with output ends of the input EMC module 1, an output end of the first rectifying circuit 21 is connected with an input end of the power factor adjusting module 3 to supply power to a charging main circuit, an output end of the second rectifying circuit 22 is connected with an input end of the switching power supply circuit 23, and an output end of the switching power supply circuit 23 is respectively connected with power supply ends of the driving control module 5 and the power factor adjusting module 3 to provide working power for chips in the driving control module 5 and the power factor adjusting module 3.
It should be noted that, as shown in fig. 2, when the system is connected to an external ac mains supply, the ac input power is input to the rectifying module 2, the first rectifying circuit 21 rectifies the ac input power and outputs the rectified ac input power to the main charging circuit, at this time, the driving control module 5 and the power factor adjusting module 3 are not powered on, the second rectifying circuit 22 and the converting power supply circuit 23 are required to provide power for the driving control module 5 and the power factor adjusting module 3, and after the chips in the driving control module 5 and the power factor adjusting module 3 are powered on, the driving output module 4 is controlled to charge the automobile battery, so that orderly power supply is realized, and the stability and controllability of the charging process of the automobile battery are ensured; in fig. 3, the rectifier bridge BR1 is a first rectifier circuit 21, and the diodes D2 and D4 form a second rectifier circuit 22, and the rectified power supply is divided to form a dc voltage of 13.7V for providing to the driving control module 5 and the chips in the power factor adjusting module 3.
In the invention, the connection relation of each circuit node in the diagrams 3 and 4 is as follows, T4 and T8 in the diagram 3 are connected with T14 in the diagram 4, T6 in the diagram 3 is connected with T13 in the diagram 4, and power supply of 13.7V voltage is realized; in addition, T12 in fig. 3 is connected to the ground terminal in fig. 4, T37 in fig. 3 is connected to T4 in fig. 4, T5 in fig. 3 is connected to T17 in fig. 4, T10 in fig. 3 is connected to T100 in fig. 4, T38 in fig. 3 is connected to T101 in fig. 4, T11 in fig. 4 is connected to T6 in fig. 3, T46 in fig. 3 is connected to T108 in fig. 4, T30 in fig. 3 is connected to T32 in fig. 4, T29 in fig. 3 is connected to T33 in fig. 4, T28 in fig. 3 is connected to T31 in fig. 4, T26 in fig. 3 is connected to T34 in fig. 4, and T27 in fig. 3 is connected to T24 in fig. 4.
In one embodiment of the present invention, the power factor adjusting module 3 includes a first PFC driving chip, a first differential amplifying circuit, a first MOS transistor, a first inductor, a first diode, a first charging capacitor group, a current feedback circuit, and a voltage feedback circuit, where a PWM output end of the first PFC driving chip is connected to a gate of the first MOS transistor through the first differential amplifying circuit, a source electrode of the first MOS transistor is grounded, a drain electrode of the first MOS transistor is connected to a second end of the first inductor, a first end of the first inductor is connected to an output end of the first rectifying circuit 21, a first end of the first diode is connected to a second end of the first inductor, a second end of the first diode is connected to an input end of the driving output module 4, a first end of the first charging capacitor group is connected to a second end of the first diode, a second end of the current feedback circuit is grounded, an input end of the current feedback circuit is connected to a source electrode of the first MOS transistor, an output end of the first PFC driving chip is connected to an output end of the first diode, and an input end of the first diode is connected to a first output end of the first diode.
It should be noted that PFC means power factor correction, as shown in fig. 3, the chip U1 is a first PFC driving chip, and the model of the chip U1 may be ICE3PCS01, after the first PFC driving chip is powered on at a power supply end, a PWM signal is sent out according to internal settings, and transistors Q104 and Q110 form a differential amplifying circuit, where the differential amplifying circuit is used to amplify and isolate the PWM signal, reduce the influence of ambient temperature and the like on the signal, ensure the accuracy of power factor correction, and the first MOS transistor Q6 is switched under the control of the PWM signal, so that the first inductor L3 is charged and discharged, thereby solving the problem that only the voltage has no current in a short-time loop after an ac peak value in the capacitor energy storage process after the ac is rectified and output, resulting in inconsistent voltage and current phases; when the power supply is used, the first MOS tube Q6 is closed, the rectified power supply is output to the first charging capacitor group through the first MOS tube D5 and the first inductor L3, the first charging capacitor group is formed by connecting capacitors C6, C44 and C20 in parallel and is used for storing energy, the terminal voltage of the first charging capacitor group is the output voltage of the driving output module 4, after the peak value, the first MOS tube Q6 is opened, the inductor discharges, the current always exists in a loop, and the effective power output is further improved; in the current feedback circuit, a resistor RD1 is an output current limiting resistor, and output current information is transmitted to a first PFC driving chip through a D13; the voltage feedback circuit, the resistors R36, R35, R25, R44 and R46 form an output voltage regulating circuit through voltage division acquisition, output voltage information is transmitted to the first PFC driving chip, the first PFC driving chip adjusts the PWM signal according to the output voltage and current conditions, the switching frequency and the switching time of the first MOS tube Q6 are adjusted, the effective power output is continuously improved, the power factor is continuously corrected, and the optimal point is reached; in addition, in the voltage feedback circuit, the resistors R22, R19, R13, R20, R28 form a PFC output voltage protection loop, and when an overvoltage is output, the output voltage protection loop is transmitted to the first PFC driving chip, and the resistors R43, R21, R32, R33, R23 are output voltage protection circuits, and when an overvoltage is output, the output voltage protection loop is transmitted to the driving control module 5, so that overvoltage protection is performed in time when the overvoltage is output.
In one embodiment of the present invention, the power factor adjustment module 3 further includes a peak absorption circuit and a coil bypass circuit, wherein the peak absorption circuit is connected to the gate of the first MOS transistor, and a first end of the coil bypass circuit is connected to the first end of the first inductor, and a second end of the coil bypass circuit is connected to the second end of the first diode.
It should be noted that, as shown in fig. 3, the resistor R8 is used for G-pole peak absorption of the first MOS transistor Q6, and together with the diode D8, it can effectively protect the first MOS transistor Q6 from the peak voltage during switching; when the system is just connected with an external power supply, the first charging capacitor group is charged at the moment of starting up, so that the current of the first inductor L3 passing through the inductor of the PFC loop is relatively large. If the moment that the power switch is switched on is at the maximum value of sine wave, the PFC inductance L is likely to generate magnetic saturation in the process of charging the capacitor, so that the work of the PFC circuit is affected, the diodes D11 and D12 are connected in parallel and then arranged at the first inductance L3 to serve as a coil bypass circuit, so that current can pass through the bypass circuit when the power switch is started, a charging path is provided for the capacitor under the condition that the output voltage of the PFC circuit is lower than the input voltage, the danger of the magnetic saturation of the first inductance L3 to the first MOS tube Q6 is prevented, meanwhile, the burden of the first inductance L3 is reduced, the protection effect is achieved, and the stable operation of the power factor regulating module 3 is effectively ensured.
In one embodiment of the present invention, the driving output module 4 includes a driving circuit and a first transformer, an input end of the driving circuit is connected to an output end of the power factor adjusting module 3, a controlled end of the driving circuit is connected to the driving control module 5, an output end of the driving circuit is connected to a main winding of the first transformer, a secondary winding of the first transformer charges the automobile battery through a first rectifying output circuit, and an auxiliary winding of the first transformer is connected to the driving control module 5 through a second rectifying output circuit.
It should be noted that, as shown in fig. 3, the driving circuit may regulate the charging voltage and current of the battery under the control of the driving control module 5, convert the regulated power supply through the first transformer L4, rectify the power supply through the first rectification output circuit, and charge the battery of the automobile, where the output of the auxiliary winding of the first transformer is used to supply power to the soft start of the driving control module 5 after the driving output module 4 works.
In one embodiment of the present invention, the driving circuit includes a second differential amplifying circuit, a third differential amplifying circuit, a second MOS transistor, a third MOS transistor and a second inductor, where a gate of the second MOS transistor is connected to a first control end of the driving control module 5 through the second differential amplifying circuit, a drain of the second MOS transistor is connected to an output end of the power factor adjusting module 3, a source of the second MOS transistor is connected to a first end of the second inductor, a gate of the third MOS transistor is connected to a second control end of the driving control module 5 through the third differential amplifying circuit, a drain of the third MOS transistor is connected to a first end of the second inductor, a source of the third MOS transistor is grounded, a second end of the second inductor is connected to a first end of the main winding of the first transformer, and a second end of the main winding of the first transformer is grounded.
It should be noted that, as shown in fig. 3, the gates of the second MOS transistor Q3 and the third MOS transistor Q4 are respectively connected with the driving control module 5, the second MOS transistor Q3 and the third MOS transistor Q4 are switched on under the control of the PWM driving signal of the driving control module 5, an ac power is generated to the main winding of the first transformer L4, further, the secondary winding of the first transformer L4 generates a charging power and charges the automobile battery after rectification, the driving control module 5 changes the duty ratio of the PWM driving signal, so that the on frequency and the duration of the second MOS transistor Q3 and the third MOS transistor Q4 can be adjusted, the main winding side input power of the first transformer L4 is changed, and then the charging voltage and the current of the automobile battery are changed, and the second inductor L4 stores energy and improves the power curve function, so that the driving control module 5 can adopt different outputs according to the state of the battery, and the charging voltage and current of the automobile battery are stable by adjusting at the same time when outputting; the second differential amplifying circuit is formed by the triodes Q75 and Q77, the third differential amplifying circuit is formed by the triodes Q76 and Q80, and the second differential amplifying circuit and the third differential amplifying circuit are used for improving the stability and the accuracy of PWM driving signals output by the driving control module 5 to the second MOS tube Q3 and the third MOS tube Q4, so that the accurate control of the battery charging power supply is ensured.
In one embodiment of the present invention, the driving control module 5 includes a first output control chip 51, a regulated power supply circuit 52, a control loop soft start circuit 53, and a delay circuit 54, where an input end of the regulated power supply circuit 52 is connected to the switching power supply circuit 23, an output end of the regulated power supply circuit is connected to the first output control chip 51, an input end of the delay circuit 54 is connected to a delay signal end of the first output control chip 51 through a delay capacitor, the delay capacitor is used to control a delay time length, a first input end of the control loop soft start circuit 53 is connected to the regulated power supply circuit 52, a second input end of the control loop soft start circuit is connected to the second rectifying output circuit, and an output end of the control loop soft start circuit is connected to the soft start end of the first output control chip 51.
It should be noted that, as shown in fig. 4, the chip U6 is a first output control chip 51, the model of which may be L6599D, the voltage stabilizing power supply circuit 52 is disposed at the power end of the first output control chip 51, the input end of the voltage stabilizing power supply circuit is connected to the switching power supply circuit 23, three poles of 3 triodes Q7, Q2, Q29 and resistors R91, R120, R93, R120 in the voltage stabilizing power supply circuit 52 form a half-bridge power supply management circuit with capacitors C37, C18, C51, C1, and a stable power supply is provided for the pin of the chip U612; in the delay circuit 54, the 3 pin of the chip U6 is a delay pin, and is connected with a capacitor C45, and the size of the capacitor C45 is adjusted, so that the delay time of the first output control chip 51 of the delay circuit 54 through the output of the delay circuit 54 can be changed; when the control loop soft start circuit 53 is powered on, the 13.7V voltage of the conversion power supply circuit 23 is converted into 5V voltage through the chip U2 to serve as the voltage of the soft start pin of the chip U6, and when the charging work is performed, the auxiliary winding of the first transformer generates voltage, the voltage is compared and amplified through the amplifier U7B to be output to serve as the power supply of the control loop soft start circuit 53, so that the ordered power supply of the soft start end of the chip U6 is realized.
In one embodiment of the present invention, the driving control module 5 further includes a constant current loop control circuit 55 and a constant voltage loop control circuit 56, where the constant current loop control circuit 55 includes a first current detection amplifier, a first comparator, a first triode, a first optocoupler, and a first operational amplifier, where a current sampling resistor is connected between two input ends of the first current detection amplifier, the sampling resistor is disposed between a negative output end of the first rectifying output circuit and a negative electrode of the automobile battery, an output end of the first current detection amplifier is connected to the first operational amplifier and a positive input end of the first comparator, a negative electrode of the first comparator is connected to a reference voltage, an output end of the first comparator is connected to a base electrode of the first triode, an emitter of the first triode is connected to the first operational amplifier, a collector of the first optocoupler is connected to an emitting end of the first optocoupler, and a receiving end of the first optocoupler is connected to the first output control chip 51.
It should be noted that, the constant current loop control circuit 55 and the constant voltage loop control circuit 56 are used for controlling the constant current or the constant voltage of the automobile battery to meet the requirements of each stage of the automobile battery, the constant current loop control circuit 55 and the constant voltage loop control circuit 56 respectively collect the output current and the voltage of the rechargeable battery and perform the reference difference value operation on the output current and the voltage, the current deviation value is transmitted to the first output control chip 51, the first output control chip 51 adjusts the output PWM signal, changes the charging power supply, and realizes the constant current or the constant voltage control mode; as shown in fig. 3, two ends of the sampling resistor R109 are respectively connected with a negative output end of the first rectifying output circuit and a negative electrode of the automobile battery, as shown in fig. 4, the first comparator is composed of an operational amplifier U9B and a connecting element thereof, a current sampling resistor R109 is connected between two input ends of the first current detection amplifier U3, voltage at two ends of the current sampling resistor R109 is subjected to difference operation, a first path of difference signal is output to the first operational amplifier U141B, a second path of difference signal is compared with a reference voltage through the first comparator to generate a bias voltage, the bias voltage is input to a base electrode of the first triode Q33, under the action of the first triode Q33, the first operational amplifier U141B and a loop element thereof, the bias voltage enables the first triode Q33 to collect and emit a current signal, the signal flows through the first optocoupler P8 and is isolated through photoelectric conversion, and is received by the first output control chip 51, and further a charging power supply is adjusted, and a current bias value is changed to realize constant current charging.
In one embodiment of the present invention, the constant voltage loop control circuit 56 includes a constant voltage control chip, a follower circuit, a comparison and conversion circuit, and a second optocoupler, where two input ends of the constant voltage control chip are connected to two ends of a second diode through a set of voltage dividing circuits, an anode of the second diode is connected to a positive output end of the first rectification output circuit, a cathode of the second diode is connected to an anode of the automobile battery, an output end of the constant voltage control chip is connected to an input end of the follower circuit, an output end of the follower circuit is connected to an input end of the comparison and conversion circuit, an output end of the comparison and conversion circuit is connected to a transmitting end of the second optocoupler, and a receiving end of the second optocoupler is connected to the first output control chip 51.
It should be noted that, as shown in fig. 4, as shown in fig. 3, the resistors R42, R56, R48, and R45 adopt a voltage division and collection mode to form a first group of voltage division circuits, the resistors R60, R61, R63, R57, and R62 adopt a voltage division and collection mode to form a second group of voltage division circuits, the constant voltage control chip calculates to obtain an output voltage signal, the follower circuit comprises an operational amplifier U140A, a connection resistor and a capacitor thereof, the comparison and conversion circuit comprises an operational amplifier U140B, a connection resistor and a capacitor thereof, the follower circuit can improve the accuracy of the output voltage signal, the comparison and conversion circuit compares the output deviation signal, and the output deviation signal is transmitted to the first output control chip 51 by the second optocoupler P2, so as to regulate the charging power supply, change the output voltage, and realize the control mode of constant voltage charging when necessary.
In one embodiment of the present invention, the automobile battery charging control circuit further includes a main soft start circuit 6 and a first thermistor, the output end of the input EMC module 1 is connected with the input end of the rectifying module 2 through the first thermistor, the main soft start circuit 6 includes a second triode, a first relay and a third diode, the base of the second triode is connected with the output end of the delay circuit 54, the emitter is grounded, the base is connected with a working power supply through the coil of the first relay, the third diode is connected in parallel with two ends of the coil of the first relay, and the normally open contact of the first relay is connected in parallel with two ends of the first thermistor.
It should be noted that, because a larger current may be generated when the external ac power is initially powered on and accesses the load, the damage to the elements in the circuit and the automobile battery may be caused, as shown in fig. 3, the first thermistor RT1 is in a high-resistance state when powered on, so as to effectively reduce the current of the main charging loop, realize protection, and after 10 seconds of power on, the first thermistor RT1 may be short-circuited when the circuit is stably charged, so as to reduce loss and improve stability of charging control, at this time, the first output control chip 51 makes the second triode Q1 conductive through the delay signal of the delay loop, and then the first relay K1 is attracted, and is connected in parallel with the first thermistor RT1 to be connected with the switch, the ac power is input into the rectifying module 2 through the first relay K1, so as to realize soft start of the main circuit, effectively protect stable operation of the circuit, and the second triode D6 may absorb the inductive current when the first relay K1 is switched, so as to protect the second triode Q1, and realize stable control.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (10)
1. A new energy automobile battery charge control system, characterized by comprising: input EMC module (1), rectifier module (2), drive output module (4), drive control module (5) and power factor adjustment module (3), the input of input EMC module (1) is suitable for connecting outside alternating current power supply, the output with the input of rectifier module (2) is connected, the input of power factor adjustment module (3) with the output of rectifier module (2) is connected, the output with the input of drive output module (4) is connected, in order to boost and improve circuit power factor, the controlled end of drive output module (4) with drive control module (5) are connected, the output is connected with car battery, in order to be in under the control of drive control module (5) charge car battery.
2. The battery charging control system of the new energy automobile according to claim 1, wherein the rectifying module (2) comprises a first rectifying circuit (21), a second rectifying circuit (22) and a conversion power supply circuit (23), the input ends of the first rectifying circuit (22) and the second rectifying circuit are respectively connected with the output ends of the input EMC module (1), the output end of the first rectifying circuit (21) is connected with the input end of the power factor adjusting module (3) to supply power for a charging main circuit, the output end of the second rectifying circuit (22) is connected with the input end of the conversion power supply circuit (23), and the output end of the conversion power supply circuit (23) is respectively connected with the power supply ends of the driving control module (5) and the power factor adjusting module (3) to provide working power for chips in the driving control module (5) and the power factor adjusting module (3).
3. The new energy automobile battery charging control system according to claim 2, wherein the power factor regulating module (3) comprises a first PFC driving chip, a first differential amplifying circuit, a first MOS transistor, a first inductor, a first diode, a first charging capacitor group, a current feedback circuit and a voltage feedback circuit, wherein a PWM output end of the first PFC driving chip is connected to a gate of the first MOS transistor through the first differential amplifying circuit, a source electrode of the first MOS transistor is grounded, a drain electrode of the first PFC driving chip is connected to a second end of the first inductor, a first end of the first inductor is connected to an output end of the first rectifying circuit (21), a first end of the first diode is connected to a second end of the first inductor, a second end of the first PFC diode is connected to an input end of the driving output module (4), a first end of the first charging capacitor group is connected to a second end of the first diode, a second end of the current feedback circuit is grounded, an input end of the current feedback circuit is connected to a gate of the first MOS transistor, a first end of the PFC diode is connected to a source electrode of the first PFC output end of the first PFC transistor, and a first diode is connected to an input end of the first diode.
4. The new energy automobile battery charging control system according to claim 3, wherein the power factor adjusting module (3) further comprises a peak value absorption circuit and a coil bypass circuit, the peak value absorption circuit is connected with the gate of the first MOS transistor, a first end of the coil bypass circuit is connected with a first end of the first inductor, and a second end of the coil bypass circuit is connected with a second end of the first diode.
5. The new energy automobile battery charging control system according to claim 2, wherein the driving output module (4) comprises a driving circuit and a first transformer, the input end of the driving circuit is connected with the output end of the power factor adjusting module (3), the controlled end is connected with the driving control module (5), the output end is connected with the main winding of the first transformer, the secondary winding of the first transformer charges the automobile battery through the first rectifying output circuit, and the auxiliary winding of the first transformer is connected with the driving control module (5) through the second rectifying output circuit.
6. The new energy automobile battery charging control system according to claim 5, wherein the driving circuit comprises a second differential amplifying circuit, a third differential amplifying circuit, a second MOS tube, a third MOS tube and a second inductor, wherein a grid electrode of the second MOS tube is connected with a first control end of the driving control module (5) through the second differential amplifying circuit, a drain electrode of the second MOS tube is connected with an output end of the power factor adjusting module (3), a source electrode of the second MOS tube is connected with a first end of the second inductor, a grid electrode of the third MOS tube is connected with a second control end of the driving control module (5) through the third differential amplifying circuit, a drain electrode of the third MOS tube is connected with a first end of the second inductor, a source electrode of the second MOS tube is grounded, a second end of the second MOS tube is connected with a first end of a main winding of the first transformer, and a second end of the main winding of the first transformer is grounded.
7. The battery charging control system of a new energy automobile according to claim 5, wherein the driving control module (5) comprises a first output control chip (51), a voltage stabilizing power supply circuit (52), a control loop soft start circuit (53) and a delay circuit (54), wherein an input end of the voltage stabilizing power supply circuit (52) is connected with the switching power supply circuit (23), an output end of the voltage stabilizing power supply circuit is connected with the first output control chip (51), an input end of the delay circuit (54) is connected with a delay signal end of the first output control chip (51) through a delay capacitor, the delay capacitor is used for controlling delay time length, a first input end of the control loop soft start circuit (53) is connected with the voltage stabilizing power supply circuit (52), a second input end of the control loop soft start circuit is connected with the second rectifying output circuit, and an output end of the control loop soft start circuit is connected with the first output control chip (51).
8. The new energy automobile battery charging control system according to claim 7, wherein the driving control module (5) further comprises a constant current loop control circuit (55) and a constant voltage loop control circuit (56), the constant current loop control circuit (55) comprises a first current detection amplifier, a first comparator, a first triode, a first optocoupler and a first operational amplifier, a current sampling resistor is connected between two input ends of the first current detection amplifier, the sampling resistor is arranged between a negative output end of the first rectifying output circuit and a negative electrode of the automobile battery, an output end of the first current detection amplifier is connected with positive input ends of the first operational amplifier and the first comparator respectively, a negative electrode of the first comparator is connected with a reference voltage, an output end of the first comparator is connected with a base electrode of the first triode, an emitter electrode of the first triode is connected with the first operational amplifier, a collector electrode of the first optocoupler is connected with a transmitting end of the first optocoupler, and a receiving end of the first optocoupler is connected with the first output control chip (51).
9. The charging control system of a new energy automobile battery according to claim 8, wherein the constant voltage loop control circuit (56) comprises a constant voltage control chip, a follower circuit, a comparison and conversion circuit and a second optocoupler, two input ends of the constant voltage control chip are respectively connected with two ends of a second diode through a group of voltage dividing circuits, an anode of the second diode is connected with a positive output end of the first rectification output circuit, a cathode of the second diode is connected with an anode of the automobile battery, an output end of the constant voltage control chip is connected with an input end of the follower circuit, an output end of the follower circuit is connected with an input end of the comparison and conversion circuit, an output end of the comparison and conversion circuit is connected with a transmitting end of the second optocoupler, and a receiving end of the second optocoupler is connected with the first output control chip (51).
10. The new energy automobile battery charging control system according to claim 7, further comprising a main soft start circuit (6) and a first thermistor, wherein the output end of the input EMC module (1) is connected with the input end of the rectifying module (2) through the first thermistor, the main soft start circuit (6) comprises a second triode, a first relay and a third diode, the base electrode of the second triode is connected with the output end of the delay circuit (54), the emitter is grounded, the base electrode is connected with a working power supply through the coil of the first relay, the third diode is connected in parallel with two ends of the coil of the first relay, and the normally open contact of the first relay is connected in parallel with two ends of the first thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310160676.6A CN118544844A (en) | 2023-02-24 | 2023-02-24 | New energy automobile battery charge control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310160676.6A CN118544844A (en) | 2023-02-24 | 2023-02-24 | New energy automobile battery charge control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118544844A true CN118544844A (en) | 2024-08-27 |
Family
ID=92444719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310160676.6A Pending CN118544844A (en) | 2023-02-24 | 2023-02-24 | New energy automobile battery charge control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118544844A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860237A (en) * | 2010-06-01 | 2010-10-13 | 海洋王照明科技股份有限公司 | High-power factor constant-current circuit and power source |
| CN207225123U (en) * | 2017-09-18 | 2018-04-13 | 铠龙东方汽车有限公司 | A kind of charging unit for portable lithium-ion-power cell |
| CN109617200A (en) * | 2018-10-25 | 2019-04-12 | 张家港市华为电子有限公司 | A kind of intelligent modularized charger |
| CN210337601U (en) * | 2019-07-11 | 2020-04-17 | 珠海英搏尔电气股份有限公司 | Charger with PFC inductance boards arranged in stacked mode and electric vehicle |
| US20220363154A1 (en) * | 2021-07-31 | 2022-11-17 | Huawei Digital Power Technologies Co., Ltd. | Charging Apparatus and New Energy Vehicle |
| KR102488223B1 (en) * | 2022-05-26 | 2023-01-16 | 지투파워(주) | Charging system for electric vehicle with resonant dc-dc converter |
-
2023
- 2023-02-24 CN CN202310160676.6A patent/CN118544844A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860237A (en) * | 2010-06-01 | 2010-10-13 | 海洋王照明科技股份有限公司 | High-power factor constant-current circuit and power source |
| CN207225123U (en) * | 2017-09-18 | 2018-04-13 | 铠龙东方汽车有限公司 | A kind of charging unit for portable lithium-ion-power cell |
| CN109617200A (en) * | 2018-10-25 | 2019-04-12 | 张家港市华为电子有限公司 | A kind of intelligent modularized charger |
| CN210337601U (en) * | 2019-07-11 | 2020-04-17 | 珠海英搏尔电气股份有限公司 | Charger with PFC inductance boards arranged in stacked mode and electric vehicle |
| US20220363154A1 (en) * | 2021-07-31 | 2022-11-17 | Huawei Digital Power Technologies Co., Ltd. | Charging Apparatus and New Energy Vehicle |
| KR102488223B1 (en) * | 2022-05-26 | 2023-01-16 | 지투파워(주) | Charging system for electric vehicle with resonant dc-dc converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111355398B (en) | Bidirectional vehicle-mounted charger circuit integrated with DC/DC converter | |
| US20160181925A1 (en) | Bidirectional dc-dc converter | |
| CN108879895B (en) | Electric automobile energy transmission system and transmission method | |
| EP3534484B1 (en) | Charge and discharge device | |
| CN104333239A (en) | High-efficiency totally-integrated AC-DC converter | |
| CN113517764B (en) | Wireless charging system for real-time calibration of resonant frequency of transmitting terminal | |
| CN118544844A (en) | New energy automobile battery charge control system | |
| CN202424283U (en) | Charger based on single-chip three-end TOP22X integrated chip | |
| CN107612030B (en) | Photovoltaic converter with current quasi-critical continuous and device soft switch | |
| CN108879982B (en) | Bistable primary side constant-current magnetic induction coupling wireless charging device and use method thereof | |
| CN204809909U (en) | Mobile power supply | |
| CN112421734A (en) | Single-stage high-order compensation constant-current constant-voltage wireless charging device and method | |
| CN113746348B (en) | Push-pull series resonance soft switch switching circuit, switching method thereof and chip | |
| CN112583081B (en) | Quick wireless charging circuit of battery | |
| CN215734058U (en) | Unmanned aerial vehicle machine carries power | |
| CN209805671U (en) | single three-phase input voltage compatible magnetic integrated bridgeless power factor correction device | |
| CN221202371U (en) | Flyback switching power supply constant current output circuit | |
| CN110829850A (en) | Vehicle-mounted converter circuit and control method thereof | |
| EP4439907A1 (en) | Power converter and control method therefor, uninterruptible power supply, and power supply system | |
| CN110190742B (en) | Magnetic integration bridgeless power factor correction device compatible with single-phase input voltage and three-phase input voltage | |
| CN212969456U (en) | General emergency lighting centralized power supply module | |
| CN215344103U (en) | Unmanned aerial vehicle wireless charging system is patrolled and examined to electric power based on switched capacitor network | |
| Gao et al. | Analysis and Design of a Wireless Power Transfer System Based on Interleaved Boost Converter | |
| CN219420596U (en) | Gallium nitride miniaturized power supply | |
| CN111917150B (en) | Control circuit of bidirectional converter, bidirectional converter and power module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |