CN111890984A - Voltage conversion control system of electric automobile - Google Patents
Voltage conversion control system of electric automobile Download PDFInfo
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- CN111890984A CN111890984A CN202010863499.4A CN202010863499A CN111890984A CN 111890984 A CN111890984 A CN 111890984A CN 202010863499 A CN202010863499 A CN 202010863499A CN 111890984 A CN111890984 A CN 111890984A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 55
- 238000004146 energy storage Methods 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a voltage conversion control system of an electric automobile, which comprises three voltage converters, wherein the three voltage converters are used for respectively controlling the charging and discharging processes among a starting battery, an energy storage battery and alternating current mains supply. The invention has the advantages that: the three voltage converters are connected with all voltage components in the vehicle to realize the conversion among the three voltages of the starting battery, the energy storage battery and the alternating current commercial power in the vehicle, realize the energy conversion and complementation in the vehicle and improve the power utilization efficiency of the vehicle.
Description
Technical Field
The invention relates to the field of electric automobile charging, in particular to a voltage conversion control system of an electric automobile.
Background
The automobile comprises a plurality of types of voltage conversion and utilization, mainly comprises a 12V starting battery, a 48V energy storage battery, an alternating current 220V and the like, and when the automobile runs, the voltage is required to be subjected to coordination control and charging and discharging control so as to meet the running requirements of the automobile. At present, the common voltage conversion in the vehicle on the market is simpler, and the interconversion among three voltages in the design of a system is not available so as to meet the power utilization requirement of the whole vehicle. Moreover, the prior art does not have the mutual conversion among the three and the design of charging, particularly on a modified vehicle; in addition, in the prior art, the electric energy is only transferred by the alternating current mains supply to charge the starting battery and the energy storage battery, so that automatic conversion between the three voltages according to requirements cannot be realized, and mutual free conversion between the three voltages cannot be realized to realize energy complementation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a voltage conversion control system of an electric automobile, which is used for realizing the conversion among three voltages of a starting battery, an energy storage battery and an alternating current commercial power in the automobile, realizing the energy conversion and complementation in the automobile and improving the power utilization efficiency of the automobile.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an electric automobile voltage conversion control system, the system includes three voltage converter, three voltage converter are used for controlling respectively and start the charge-discharge process between battery, energy storage battery and the alternating current commercial power.
The three-voltage converter is provided with a first interface used for connecting a starting battery, a second interface used for connecting an energy storage battery and a third interface used for connecting a mains supply plug.
The three voltage converters are respectively connected with the vehicle state detection module, the starting battery voltage detection module and the energy storage battery voltage detection module; when the three-voltage converter detects that the vehicle is started or runs, the starting battery is controlled to charge the energy storage battery to be started or stopped by detecting the voltages of the starting battery and the energy storage battery.
The three-voltage converter further comprises a 220V voltage output interface, the three-voltage converter is used for starting the 220V voltage output interface according to the control signal, and the three-voltage converter is used for controlling the output voltage of the energy storage battery to be converted into 220V alternating current.
After the three-voltage converter receives a mains supply AC220V power supply and enters the three-voltage converter through the third interface, the three-voltage converter detects the voltages of the starting battery and the energy storage battery and controls whether to supply power to the starting battery and the energy storage battery according to the voltages.
The three-voltage converter comprises a main control chip, a first control switch and a first charging circuit, wherein the first control switch is connected with the first charging circuit in series and then is respectively connected with a starting battery and an energy storage battery through a first interface and a second interface, and the output end of the main control chip is respectively connected with the control end of the charging circuit and the first control switch and is used for respectively controlling the starting of the first charging circuit and the starting and closing of the first control switch; the main control chip is respectively connected with a voltage sensor, and the voltage sensors respectively detect the voltage data of the energy storage battery and the starting battery.
The three-voltage converter further comprises an inverter circuit and an inverter circuit switch, the inverter circuit and the inverter circuit switch are connected in series and then are respectively connected with a first interface and a 220V voltage output interface, the output end of the main control chip is respectively connected to the control end of the inverter circuit and the control end of the inverter circuit switch, and the input end of the main control chip is connected with the 220V power supply control switch and is used for respectively controlling whether the inverter circuit works or not and switching off the inverter circuit switch according to a switching signal of the 220V power supply control switch.
The three-voltage converter further comprises an alternating current power supply switch, one end of the alternating current power supply switch is connected to the interface III, the other end of the alternating current power supply switch is connected to the 220V voltage output interface, and the output end of the main control chip is connected to the alternating current power supply switch and used for controlling the on and off of the alternating current power supply switch.
The three-voltage converter further comprises a second charging branch for connecting the interface III with the interface I and a third charging branch for connecting the interface III with the interface II, the second charging branch and the third charging branch are used for charging a starting battery and an energy storage battery respectively after alternating current conversion is carried out after the interface III is connected into alternating current commercial power, and the output end of the main control chip is connected with the second charging branch and the third charging branch respectively to control the work of the second charging branch and the third charging branch.
And the main control chip judges the SOC states corresponding to the energy storage battery and the starting battery according to the terminal voltages of the energy storage battery and the starting battery, and performs charging control according to the SOC states.
The invention has the advantages that: the conversion among three voltages of a starting battery, an energy storage battery and an alternating current commercial power in the vehicle is realized, the energy conversion and complementation in the vehicle are realized, and the power utilization efficiency of the vehicle is improved; the structure is simple and scientific, and the energy conversion of the power supply among the three can be realized to the maximum extent, so that the energy complementation is realized.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic diagram of a three-voltage converter in a voltage conversion control system according to the present invention;
fig. 2 is a schematic diagram of the internal structure of the three-voltage converter according to the present invention.
The labels in the above figures are: an ACC switch; 2. starting the battery; 3. an energy storage battery; AC220V power control switch; 5. three voltage free conversion inverters; 6. a waterproof plug.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The automobile starting battery is converted into the energy storage battery through the three voltage free conversion inverters to charge so as to meet the requirement of providing power for corresponding electric equipment, and meanwhile, the energy storage battery can be converted into AC220 voltage through the three voltage free conversion inverters so as to meet the requirement of providing power for AC220V electric equipment; when the automobile is parked, the AC220V commercial power can be switched on to directly supply power to the AC220V electric equipment, and meanwhile, the energy storage battery and the automobile starting battery can be charged through the three voltage free conversion inverters, so that energy complementation is realized.
As shown in fig. 1, the present invention is a schematic diagram of connection between external interfaces of three voltage free-conversion inverters (hereinafter referred to as three-voltage converters) and external devices; the three-voltage converter is used for respectively controlling the charging and discharging processes among the starting battery, the energy storage battery and the alternating current commercial power. The specific connection relationship comprises: the three-voltage converter is provided with a first interface used for connecting a starting battery, a second interface used for connecting an energy storage battery, a third interface used for connecting a mains supply plug and a 220V voltage output interface used for connecting a high-voltage electric appliance in the vehicle, an ACC switch interface used for connecting an ACC switch and a 220V switch power supply interface used for connecting a 220V power supply control switch, and a plurality of communication interfaces (not shown in the figure) are arranged on the three-voltage converter. The three voltage converters are respectively connected with the vehicle state detection module, the starting battery voltage detection module and the energy storage battery voltage detection module; the vehicle state detection module CAN be connected to a CAN bus through a communication interface to acquire signals of a vehicle engine controller, a BCM and the like, or CAN be connected to acquire an ACC switch signal according to an ACC switch to acquire a vehicle form state. The starting battery voltage detection module and the energy storage battery voltage detection module are respectively realized by two voltage sensors and are used for acquiring voltage signals of corresponding batteries. The voltage sensor can be directly arranged in the battery, and then the voltage of the starting battery and the voltage of the energy storage battery can be represented by detecting the voltage of the interface I and the interface II connected with the starting battery. When the three-voltage converter detects that the vehicle is started or runs, the starting battery and the energy storage battery are controlled to be charged and turned on and off by the starting battery through detecting the voltage of the starting battery. The three-voltage converter is used for starting the 220V voltage output interface according to a switching signal of the 220V power supply control switch, and the three-voltage converter is used for controlling the output voltage of the energy storage battery to be converted into 220V alternating current and then output to a high-voltage electric appliance in the vehicle through the alternating current output interface.
After the three-voltage converter receives the mains supply AC220V and enters the three-voltage converter through the third interface, the three-voltage converter detects the voltages of the starting battery and the energy storage battery and controls whether to supply power to the starting battery and the energy storage battery according to the voltages. And meanwhile, the alternating current commercial power is controlled to supply power to the high-voltage electric appliance in the vehicle according to the switching signal of the 220V power supply control switch.
As shown in fig. 2, the schematic diagram of the internal circuit structure of the three-voltage converter includes a main control chip, a first control switch, and a first charging circuit, where the main control chip is used for controlling the whole three-voltage converter and collecting data, and the main control chip is developed by using a common controller, such as a 51-chip microcomputer. The first control switch is mainly used for controlling whether the circuit is conducted or not and is realized by adopting a relay or a contactor; the first charging circuit is mainly used for charging the energy storage battery by starting the battery, and is realized by adopting a common charging circuit which comprises a boosting circuit, a voltage stabilizing circuit and the like or an existing integrated charging circuit module. The concrete connection structure is as follows: the first control switch is connected with the first charging circuit in series and then is connected with the starting battery and the energy storage battery through a first interface and a second interface respectively, the first interface and the second interface can adopt plug-in interfaces and are used for realizing the connection between an external battery and an internal circuit of the three-voltage converter, and the output end of the main control chip is connected with the control end of the charging circuit and the first control switch respectively and is used for controlling the starting of the first charging circuit and the starting and closing of the first control switch respectively; the first charging circuit can be realized by adopting a charging chip, and the work of the first charging circuit is controlled by a main control chip; the first control switch is used for being opened and closed according to the control of the main control chip, so that the starting battery can charge the energy storage battery.
The main control chip is connected with a voltage sensor, and the voltage sensor respectively detects the voltage data of the energy storage battery and the starting battery. The voltage sensor can be externally arranged outside the three-voltage converter and connected with an internal main control chip through a communication interface, and can also be directly arranged in the three-voltage converter, and the voltage of a starting battery and an energy storage battery connected with the first interface and the second interface is detected through the first interface and the second interface.
The three-voltage converter further comprises an inverter circuit and an inverter circuit switch, the inverter circuit and the inverter circuit switch are connected in series and then are respectively connected with a first interface and a 220V voltage output interface, the output end of the main control chip is respectively connected to the control end of the inverter circuit and the control end of the inverter circuit switch, and the input end of the main control chip is connected with the 220V power supply control switch and is used for respectively controlling whether the inverter circuit works or not and switching off the inverter circuit switch according to a switching signal of the 220V power supply control switch. The inverter circuit adopts a bridge inverter to convert direct current into alternating current and then supplies power to the vehicle-mounted electrical equipment, and the inverter circuit switch adopts a contactor to realize the conduction of a loop. The on-off of the switch of the inverter circuit and the work of the inverter circuit are controlled through the acquired switching signal of the 220V power supply control switch, so that the power supply for the vehicle-mounted electrical appliance is realized according to the switching control.
The three-voltage converter further comprises an alternating current power supply switch, one end of the alternating current power supply switch is connected to the third interface, the other end of the alternating current power supply switch is connected to the 220V voltage output interface, and the output end of the main control chip is connected to the alternating current power supply switch and used for controlling the on and off of the alternating current power supply switch. The AC power supply switch adopts an AC contactor to realize the conduction of a control loop. After the alternating-current mains supply is connected to the third interface, the alternating-current power is output to the vehicle-mounted electric appliance through the 220V power output interface after passing through the alternating-current power supply switch, so that the purpose that when the mains supply charges the vehicle, the 220V alternating-current power is directly used for supplying power to the high-voltage electric appliance in the vehicle as required is achieved. And the control is performed according to the AC220V power control switch, after the commercial power is input to the three-voltage converter through the charging plug via the interface three, the control is performed through the detected closed state of the AC220V power control switch.
Furthermore, the third voltage converter further comprises a second charging branch for connecting the third interface with the first interface and a third charging branch for connecting the third interface with the second interface, the second charging branch and the third charging branch are used for charging the starting battery and the energy storage battery respectively after the third interface is connected with the alternating current mains supply and alternating current is converted, and the output end of the main control chip is connected with the second charging branch and the third charging branch respectively to control the work of the main control chip. The second charging branch comprises a second charging circuit and a second control switch, the third charging branch comprises a third charging circuit and a third control switch, the second control switch and the second control switch are both realized by adopting contactors, the second charging circuit and the third charging circuit respectively comprise a rectifying circuit and a voltage stabilizing circuit, and the rectifying circuit rectifies and stabilizes alternating current and supplies power to a starting battery or an energy storage battery. When the vehicle is parked, after the third interface is connected with a mains supply through an external waterproof socket, the main control chip judges whether the vehicle needs to be charged or not through the voltage of the energy storage battery and the terminal voltage of the starting battery, and after the vehicle needs to be charged, the output end of the main control chip is respectively connected with the second control switch and the third control switch to respectively control the second control switch and the third control switch to be closed. 220V commercial power is sent into the starting battery after the second branch of charging, sends into energy storage battery through the third branch of charging to charge for energy storage battery, starting battery respectively.
In the application, the main control chip judges the SOC states corresponding to the energy storage battery and the starting battery according to the terminal voltages of the energy storage battery and the starting battery, the charging control is carried out according to the voltage of the root end, the electrification can be stopped at the moment when the terminal voltages reach the voltages fully corresponding to the terminal voltages, the protection is achieved, meanwhile, when the starting battery charges the energy storage battery, when the voltage of the starting battery is lower than a set value, the electrification process is stopped, and the electric quantity of the starting battery is protected.
As shown in fig. 1 and 2, when the ACC switch of the vehicle is turned on or the vehicle is running (the master control chip of the three-conversion controller is connected to the vehicle CAN network through the communication interface to obtain the engine status signal to determine the vehicle type status), the three voltage free converters receive the signal to actively detect the voltage of the vehicle DC12V starting battery, if the voltage of the vehicle DC12V starting battery is greater than 11V (the protection voltage of the vehicle starting battery CAN be programmed and written in through the three voltage free conversion inverters, the protection voltage is generally written in 11V), the vehicle DC12V starting battery will actively charge the DC48V energy storage battery (3) until the voltage of the DC12V starting battery is less than or equal to 11V or the DC48V energy storage battery is fully charged (the full voltage of the energy storage battery CAN be programmed and written in through the three voltage free conversion inverters to prevent the battery from being damaged by overcharging), the three voltage free conversion inverters will actively stop charging the DC48V energy storage battery (the control mode is The main control chip outputs a control signal to the first control switch, and the start and stop of charging are controlled through the switch;
if the three voltage free conversion inverters detect that the voltage of the starting battery of the automobile DC12V is less than or equal to 11V, the three voltage free conversion inverters do not charge the energy storage battery of the DC48V, and the function of protecting the starting battery of the automobile DC12V is achieved. The three voltage free conversion inverters acquire the terminal voltage signals of the corresponding batteries through a voltage sensor or a voltage detection circuit.
The DC48V energy storage battery can provide a DC48V power supply for supplying power to a DC48V electric device, if an AC220V power supply is needed, an AC220V power supply control switch can be turned on at the same time, at the moment, the DC48V energy storage battery is actively converted into AC220V voltage through three voltage free conversion inverters to be output (the main control chip controls the internal inverter circuit to be turned on and off to realize that the 48V energy storage battery outputs alternating current through the inverter), power is provided for the AC220V electric device, when the three voltage free conversion inverters detect that the DC48V energy storage battery is lower than 45V (program writing can be carried out on the protection voltage of the energy storage battery through the three voltage free conversion inverters, the general protection voltage writing is 45V), the three voltage free conversion inverters actively cut off the AC220V voltage output, and the DC48V energy.
When the automobile is parked, a waterproof plug (the plug is connected into the three-voltage converter through the interface three) is inserted into a mains supply AC220V power supply, after the three voltage free conversion inverters receive the input of the mains supply AC220V power supply, the power supply is provided for AC220V electric equipment through the output ends of the three voltage free conversion inverters AC220V, meanwhile, whether the voltage of a DC12V starting battery and the voltage of a DC48V energy storage battery are in a full-charge state or not can be actively detected, if the voltage of the DC12V starting battery and the voltage of the DC48V energy storage battery are not in the full-charge state, the three voltage free conversion inverters can actively charge the automobile DC12V starting battery and the DC48V energy.
When an ACC switch of the automobile is turned on or the automobile runs, the three voltage free conversion inverters receive signals, the voltage condition of the starting battery of the automobile DC12V is actively detected, and whether the charging and the stopping of the charging of the DC48V energy storage battery are actively carried out or not is determined; if the AC220V power is needed, an AC220V power control switch is turned on, the DC48V energy storage battery is actively converted into AC220V voltage through three voltage free conversion inverter internal circuits to be output, power is provided for AC220V electric equipment, and meanwhile, the voltage state of the DC48V energy storage battery is actively detected, so that the DC48V energy storage battery is protected; when the vehicle is parked, the waterproof plug is inserted into a mains supply AC220V power supply, and after the three voltage free conversion inverters receive an input signal of the mains supply AC220V power supply, the voltage states of the DC12V starting battery and the DC48V energy storage battery are actively detected and charged until the batteries are fully charged and actively stopped, so that the batteries are prevented from being damaged by overcharging. Through the scheme, mutual free conversion among the DC12V voltage, the DC48V voltage and the AC220V voltage can be realized, energy complementation is realized, three different voltage power supply requirements are provided for vehicles, the occupied space of equipment is saved, and the conversion efficiency is improved.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (10)
1. The utility model provides an electric automobile voltage conversion control system which characterized in that: the system comprises a three-voltage converter, wherein the three-voltage converter is used for respectively controlling the charging and discharging processes among a starting battery, an energy storage battery and an alternating current commercial power.
2. The voltage conversion control system of an electric vehicle according to claim 1, characterized in that: the three-voltage converter is provided with a first interface used for connecting a starting battery, a second interface used for connecting an energy storage battery and a third interface used for connecting a mains supply plug.
3. The voltage conversion control system of an electric vehicle according to claim 1 or 2, characterized in that: the three voltage converters are respectively connected with the vehicle state detection module, the starting battery voltage detection module and the energy storage battery voltage detection module; when the three-voltage converter detects that the vehicle is started or runs, the starting battery is controlled to charge the energy storage battery to be started or stopped by detecting the voltages of the starting battery and the energy storage battery.
4. The voltage conversion control system of an electric vehicle according to claim 1 or 2, characterized in that: the three-voltage converter further comprises a 220V voltage output interface, the three-voltage converter is used for starting the 220V voltage output interface according to the control signal, and the three-voltage converter is used for controlling the output voltage of the energy storage battery to be converted into 220V alternating current.
5. The voltage conversion control system of an electric vehicle according to claim 1 or 2, characterized in that: after the three-voltage converter receives a mains supply AC220V power supply and enters the three-voltage converter through the third interface, the three-voltage converter detects the voltages of the starting battery and the energy storage battery and controls whether to supply power to the starting battery and the energy storage battery according to the voltages.
6. The voltage conversion control system of an electric vehicle according to any one of claims 1 to 5, characterized in that: the three-voltage converter comprises a main control chip, a first control switch and a first charging circuit, wherein the first control switch is connected with the first charging circuit in series and then is respectively connected with a starting battery and an energy storage battery through a first interface and a second interface, and the output end of the main control chip is respectively connected with the control end of the charging circuit and the first control switch and is used for respectively controlling the starting of the first charging circuit and the starting and closing of the first control switch; the main control chip is connected with a voltage sensor, and the voltage sensor respectively detects the voltage data of the energy storage battery and the starting battery.
7. The voltage conversion control system of the electric vehicle according to claim 6, characterized in that: the three-voltage converter further comprises an inverter circuit and an inverter circuit switch, the inverter circuit and the inverter circuit switch are connected in series and then are respectively connected with a first interface and a 220V voltage output interface, the output end of the main control chip is respectively connected to the control end of the inverter circuit and the control end of the inverter circuit switch, and the input end of the main control chip is connected with the 220V power supply control switch and is used for respectively controlling whether the inverter circuit works or not and switching off the inverter circuit switch according to a switching signal of the 220V power supply control switch.
8. The voltage conversion control system of an electric vehicle according to claim 6 or 7, characterized in that: the three-voltage converter further comprises an alternating current power supply switch, one end of the alternating current power supply switch is connected to the interface III, the other end of the alternating current power supply switch is connected to the 220V voltage output interface, and the output end of the main control chip is connected to the alternating current power supply switch and used for controlling the on and off of the alternating current power supply switch.
9. The voltage conversion control system of an electric vehicle according to claim 8, wherein: the three-voltage converter further comprises a second charging branch for connecting the interface III with the interface I and a third charging branch for connecting the interface III with the interface II, the second charging branch and the third charging branch are used for charging a starting battery and an energy storage battery respectively after alternating current conversion is carried out after the interface III is connected into alternating current commercial power, and the output end of the main control chip is connected with the second charging branch and the third charging branch respectively to control the work of the second charging branch and the third charging branch.
10. The voltage conversion control system of the electric vehicle according to claim 3, characterized in that: and the main control chip judges the SOC states corresponding to the energy storage battery and the starting battery according to the terminal voltages of the energy storage battery and the starting battery, and performs charging control according to the SOC states.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010863499.4A CN111890984A (en) | 2020-08-25 | 2020-08-25 | Voltage conversion control system of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010863499.4A CN111890984A (en) | 2020-08-25 | 2020-08-25 | Voltage conversion control system of electric automobile |
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| CN111890984A true CN111890984A (en) | 2020-11-06 |
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| CN202010863499.4A Pending CN111890984A (en) | 2020-08-25 | 2020-08-25 | Voltage conversion control system of electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328506A (en) * | 2021-06-30 | 2021-08-31 | 奇瑞商用车（安徽）有限公司 | Energy storage battery control system of light fire engine |
-
2020
- 2020-08-25 CN CN202010863499.4A patent/CN111890984A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328506A (en) * | 2021-06-30 | 2021-08-31 | 奇瑞商用车（安徽）有限公司 | Energy storage battery control system of light fire engine |
| CN113328506B (en) * | 2021-06-30 | 2024-01-09 | 奇瑞商用车（安徽）有限公司 | Energy storage battery control system of light fire truck |
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