CN114148195B - Low-voltage flat-bed electric automobile charging system - Google Patents
Low-voltage flat-bed electric automobile charging system Download PDFInfo
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- CN114148195B CN114148195B CN202111528698.0A CN202111528698A CN114148195B CN 114148195 B CN114148195 B CN 114148195B CN 202111528698 A CN202111528698 A CN 202111528698A CN 114148195 B CN114148195 B CN 114148195B
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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
- 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
- B60L53/20—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 characterised by converters located in the vehicle
- B60L53/24—Using the vehicle's propulsion converter for charging
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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
- 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
- B60L53/10—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 characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- 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 discloses a low-voltage platform electric automobile charging system, which comprises a low-voltage platform vehicle-mounted charger formed by connecting two low-power platform charger cores in parallel, and battery management systems BMS and VCU, wherein the low-voltage platform vehicle-mounted charger is connected with a charging pile in a hard wire mode through a charging gun and performs signal interaction during charging; the low-voltage platform charger is connected to the power battery through a hard wire and used for transmitting electric energy to the power battery for charging. The invention has the advantages that: the charging power is increased by adopting a low-voltage platform vehicle-mounted charger formed by parallel connection of the cores of the low-power platform charger, so that the low-voltage platform is matched on the basis of meeting the requirement of improving the charging power, and the charging safety of the low-voltage platform electric automobile is ensured; the charging time can be shortened on the basis of improving the charging power, and the user experience is improved.
Description
Technical Field
The invention relates to the field of electric automobile charging, in particular to a charging system of an electric automobile with a low-voltage platform.
Background
With the development of new energy automobiles, the A00-level electric automobile is gradually popular with users, all large host factories push out the A00-level electric automobile, the voltage platform of the vehicle power battery of the level is basically about 96V, and the vehicle-mounted charger with low power (the charging power is basically 2 kw) is basically used for charging, so that the charging mode is also acceptable for vehicles with low battery capacity. However, in order to meet different demands of different users, the existing host factory can exit from two versions of high and low cruising on one vehicle type, in the low cruising version, the requirement can be basically met in time by adopting a low-power vehicle-mounted charger module, however, for vehicles with long cruising mileage, the battery capacity reaches more than 15kw/h, if the vehicle is charged by adopting a low-power charger, the battery is full for about 8 hours, the charging time is long, and customer complaints are easily caused. However, if a high-power charger or a redevelopment charger is adopted, the charging voltage platform of the high-power version is not matched with the AOO-level electric vehicle, so that charging cannot be performed, and the redevelopment of the charger can generate a cost problem, and based on the cost problem, the charging system of the A00-level electric vehicle is improved, so that the requirement on charging time is met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a low-voltage flat-table electric automobile charging system which can reduce the charging time of a long-endurance version and improve the user experience; the automatic selection of the user can be further realized, and the high-power or low-power charging can be selected under different requirements, so that the automatic selection right of the user is ensured.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the low-voltage platform electric automobile charging system comprises a low-voltage platform vehicle-mounted charger formed by connecting two low-power platform charger cores in parallel, and battery management systems BMS and VCU, wherein when in charging, the low-voltage platform vehicle-mounted charger is connected with a charging pile in a hard wire mode through a charging gun and performs signal interaction; the low-voltage platform charger is connected to the power battery through a hard wire and used for transmitting electric energy to the power battery for charging.
The low-voltage trolley vehicle-mounted charging device comprises a vehicle-mounted charging system, and is characterized by further comprising a charger controller, wherein the charger controller is used for performing CAN communication on a BMS and a VCU respectively and for exchanging charging control command signals.
The output end of the charger controller is connected with each low-power platform charger core to drive the low-power platform charger core to work; and each low-power platform charger core is connected with a relay in series to form a charger core module, and the two charger core modules are connected in parallel and then are led out of an input/output terminal for being respectively connected with a charging socket and a power battery.
The charger controller is connected with the man-machine interaction module and is used for acquiring the two low-power platform charger core working modes sent by the man-machine interaction module and controlling the work of the two low-power platform charger cores based on the working modes.
And when the working modes of the two low-power platform charger cores sent by the man-machine interaction module are not acquired, the charger controller enters a default working mode, and under the default working mode, the two low-power platform charger cores are controlled and driven to be in a working state.
The charger controller is connected with a charger temperature sensor, the charger temperature sensor is used for collecting temperature data of the two low-power platform charger cores in a working state, and when any temperature of the two low-power platform charger cores in the vehicle-mounted charger is greater than T1 ℃, the low-power platform charger cores with the temperature greater than T1 ℃ are closed to work.
The battery management system BMS is connected with the battery temperature sensor and used for collecting temperature data of the battery, and when the temperature of the battery is greater than a set threshold T2 ℃, the charging power of the vehicle-mounted charger is limited.
The man-machine interaction module comprises a vehicle-mounted multimedia system, an instrument system, a master control system and/or a vehicle networking system.
The invention has the advantages that: the charging power is increased by adopting a low-voltage platform vehicle-mounted charger formed by parallel connection of the cores of the low-power platform charger, so that the low-voltage platform is matched on the basis of meeting the requirement of improving the charging power, and the charging safety of the low-voltage platform electric automobile is ensured; the charging time can be shortened on the basis of improving the charging power, and the user experience is improved; and the temperature control is carried out on the two low-power platform charger cores which are arranged in parallel, so that the two low-power platform charger cores are controlled to work in a single-core mode or a double-core mode, and the safe and reliable operation of the cores is ensured.
Drawings
The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:
FIG. 1 is a schematic diagram of a structure of a low-voltage flat-bed vehicle-mounted charger formed by connecting two low-power platform charger cores in parallel;
FIG. 2 is a schematic diagram of the core operation control of two low power platform chargers according to the present invention;
fig. 3 is a schematic diagram of a charging flow control of the charger according to the present invention.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings, which illustrate preferred embodiments of the invention in further detail.
In the prior art, a low-voltage platform is generally a vehicle power battery voltage platform, a low-power vehicle-mounted charger is basically adopted for charging at about 96V, charging power is generally about 2kw, charging time consumption of the charging power of 2kw can be accepted by a user for a low-endurance version, but for a long-endurance version, if battery capacity reaches 15kwh or higher, charging power of the charger of about 2kw takes about 8h, and user experience is affected. The prior art's charger adopts a 3.3 kw's charger kernel to charge the vehicle of low voltage platform, and the charger kernel is a modular charging circuit that voltage such as transformer, steady voltage formed, and this application utilizes the 3.3 kw's of two low voltage platform charger (market is comparatively ripe) kernel parallelly connected, and an outer shell body just can increase the charge power to 6.6kw, and the time of charging that shortens that can be very big, and is with low costs simultaneously, stable quality. Meanwhile, as the inner cores of the two 3.3kw low-voltage platforms are connected in parallel, the voltage of the low-voltage platform still belongs to the low-voltage platform, and the charging requirement of a vehicle with the low-voltage platform can be met. The specific scheme is as follows:
as shown in fig. 1, the charging system of the low-voltage platform electric automobile comprises a low-voltage platform vehicle-mounted charger formed by connecting two low-power platform charger cores in parallel, and battery management systems BMS and VCU, wherein one end of the low-voltage platform vehicle-mounted charger is connected with a vehicle-mounted charging socket through a hard wire, and is connected with a charging gun during charging through the charging socket; the other end of the low-voltage trolley-mounted charger is connected with the charging input end of the power battery and is used for charging the power battery.
When in charging, the low-voltage flat trolley-mounted charger is connected with a charging pile in a hard wire mode through a charging gun and performs signal interaction; the low-voltage platform charger is connected to the power battery through a hard wire and used for transmitting electric energy to the power battery for charging.
The output end of the charger controller is connected with each low-power platform charger core to drive the low-power platform charger core to work; and each low-power platform charger core is connected with a relay in series to form a charger core module, and the two charger core modules are connected in parallel and then are led out of an input/output terminal for being respectively connected with a charging socket and a power battery. As shown in fig. 1, the vehicle-mounted charger comprises a charger controller, 3.3kw charger cores C1 and C2, relays K1 and K2 and the charger controller, a vehicle-mounted charging socket is connected to the input end of the charger through hardware, two branches are respectively led out from the input end of the charger, one branch is connected to the relay K1, the other branch is connected to the relay K2, and the relay K1 is connected to the output end of the charger through the 3.3kw charger core C1; the relay K2 is connected to the output end of the charger through a 3.3kw charger core C2; the output end of the charger is connected to the power battery so as to charge the power battery. The output end of the vehicle-mounted charger controller is respectively connected to the relays K1 and K2 and used for driving the relays K1 and K2 to be opened and closed; the charger temperature sensor is used for respectively acquiring temperature data of C1 and C2 and controlling the work of K1 and K2 according to the temperature data.
When the vehicle-mounted charger works, after entering a charging state, the vehicle-mounted charger defaults to control and drive the two low-power platform charger cores to be in a working state so that the charging is performed at a high power of 6.6 kw; the charger controller is connected with the man-machine interaction module and used for acquiring the two low-power platform charger core working modes sent by the man-machine interaction module and controlling the work of the two low-power platform charger cores based on the working modes. The man-machine interaction module can be a vehicle-mounted multimedia system, an instrument system, a general control system, a vehicle networking system and the like, and can control one of the charger cores to work or two of the charger cores to work simultaneously according to input signals by inputting and selecting charging power, such as 3.3kw power or 6.6kw power; if the two low-power platform charger cores working modes sent by the man-machine interaction module are not received or acquired, entering a default working mode, and controlling the two charger cores C1 and C2 to simultaneously keep working to realize high-power charging by a vehicle-mounted charger controller in the default working mode;
when the two low-power platform charger cores C1 and C2 are in a working state, acquiring temperature data of the two low-power platform charger cores in the working state through connection of a charger controller and a charger temperature sensor, and when any temperature of the two low-power platform charger cores C1 and C2 in the vehicle-mounted charger is greater than T1 ℃, closing the low-power platform charger cores with the temperature greater than T1 ℃ to work, so that 3.3kw of charging power is realized by adopting the 3.3kw of charger cores; when the temperatures of the two low-power platform charger cores C1 and C2 in the vehicle-mounted charger are both greater than T1 ℃, one of the low-power platform charger cores is disconnected firstly, so that after one of the low-power platform charger cores is operated for a set time T, if the vehicle-mounted charger core in a temperature operating state is still greater than T1 ℃, the operating low-power platform charger core is also closed, the two charger cores of the charger are not operated to close the charging, and the charging safety and reliability are ensured. When the temperatures of the two low-power platform charger cores C1 and C2 in the vehicle-mounted charger are both greater than T1 ℃, one of the low-power platform charger cores is disconnected firstly, so that after one of the low-power platform charger cores is operated for a set time T, if the temperatures are reduced, the two low-power platform charger cores C1 and C2 are alternately controlled to operate, and the two low-power platform charger cores alternately operate until the temperatures are smaller than the temperature T3, wherein the temperature T3 is smaller than the temperature T2, so that the temperature of the charger is in a controllable range, and the problem of temperature runaway generated by the parallel double cores C1 and C2 is prevented.
In the charging process, a battery management system BMS collects temperature data of a battery through a battery temperature sensor connected with the battery management system BMS, when the temperature of the battery is higher than a set threshold T2 ℃, the charging power of a vehicle-mounted charger is limited, the temperature of the battery is ensured to be in a controllable and safe range, when the temperature is higher than T2, the power is reduced, the BMS sends a control signal to a vehicle-mounted charger controller to control one of cores C1 and C2 in the charger to work, and the charger controller controls the core of the charger with relatively lower temperature to work according to the temperature of the C1 and C2; and detecting the temperature of the battery in real time after the core of one charger is adopted to work, stopping charging when the temperature is still greater than T2, and closing both cores C1 and C2 of the charger. In the application, the power battery can be connected or not through the driving control of K1 and K2, and meanwhile, the work of the power battery can be closed through the driving signals of the driving cores C1 and C2.
In the application, T1, T2 and T3 can be set according to the temperature factory parameters of an actual battery and an inner core, such as the battery generally works at the maximum of 50 ℃, and thus T2 can be set at 50 ℃.
In the application, when the charger controller controls the vehicle-mounted charger to reduce power or stop charging, the power is fed back to the VCU through the BMS, and a reminding signal is given out by the VCU.
Before the charging of the application starts, interaction between the charger controller and the VCU and BMS is actually required to realize the determination of starting the charging, specifically as shown in fig. 3, including:
the low-voltage trolley-mounted charging device further comprises a charger controller, wherein the charger controller is used for performing CAN communication on the BMS and the VCU respectively and is used for exchanging charging control command signals.
According to the method, the 3.3kw charger (the market is mature) cores of the two low-voltage platforms are connected in parallel, and the charging power can be increased to 6.6kw by adding the outer shell, so that the charging time can be greatly shortened, and meanwhile, the cost is low and the quality is stable. The low-voltage platform electric automobile charging system comprises a vehicle-mounted charger, a BMS (battery management system), a VCU (battery control unit) and a power battery, wherein the vehicle-mounted charger is provided with two charger cores of a low-voltage platform which are connected in parallel, and the vehicle-mounted charger cores are arranged in a shell. The vehicle-mounted charger is connected with the charging pile in a hard wire manner, and the vehicle-mounted charger and the charging pile are in signal interaction. And is hard-wired with the power battery to transfer electric energy to the power battery. And the vehicle-mounted charger is in CAN communication with the BMS in the charging process, and performs signal interaction, and the BMS CAN send charging requests and start charging, complete charging and other instructions to the vehicle-mounted charger. The vehicle-mounted charger is also communicated with the VCU, the VCU judges the CP state, and if the CP state is normal, a charging permission instruction is sent. The BMS is also communicated with the VCU, and only if the VCU sends a charging permission instruction, the BMS can send a charging request to the vehicle-mounted charger. The vehicle-mounted charger consists of two vehicle-mounted chargers of 3.3kw low-voltage platforms which are connected in parallel, and an outer shell is arranged outside the vehicle-mounted charger. The vehicle-mounted charger can provide vehicle charging of a low-voltage platform, and the charging power is 6.6kw.
Specifically, as shown in fig. 1 and 2, the low-voltage platform charging system includes an on-board charger, a BMS, a VCU, and a power battery, as shown in fig. two. The vehicle-mounted charger is connected with the charging pile for signal and energy interaction, when the charging gun is connected with the vehicle-mounted charger, the vehicle-mounted charger detects CC and CP signals and sends the CC and CP signals to the CAN network, and if CC and CP are normal, the vehicle-mounted charger enters a standby state and waits for a BMS charging request. The VCU judges whether the vehicle is allowed to charge according to the detected CP state and other information of the vehicle, if the state is normal, a charge allowing instruction is sent, and if the state is abnormal, a charge prohibiting instruction is sent. After receiving the charging permission instruction of the VCU, the BMS sends a charging request to the vehicle-mounted charger, and after receiving the charging request, the vehicle-mounted charger starts a charging program and enters charging. If the power battery is fully charged, the BMS sends a charging completion instruction, and the vehicle-mounted charger stops charging after receiving the instruction. The power battery is connected with the vehicle-mounted charger, receives energy from the vehicle-mounted charger, stores the energy and provides kinetic energy for the vehicle.
It is obvious that the specific implementation of the present invention is not limited by the above-mentioned modes, and that it is within the scope of protection of the present invention only to adopt various insubstantial modifications made by the method conception and technical scheme of the present invention.
Claims (1)
1. The utility model provides a low pressure platform electric automobile charging system which characterized in that: the low-voltage platform vehicle-mounted charger comprises a low-voltage platform vehicle-mounted charger formed by connecting two low-power platform charger cores in parallel, a battery management system BMS and a VCU, wherein the low-voltage platform vehicle-mounted charger is connected with a charging pile in a hard wire mode through a charging gun and performs signal interaction during charging; the low-voltage platform charger is connected to the power battery through a hard wire and used for transmitting electric energy to the power battery for charging;
the charger controller is connected with a charger temperature sensor, the charger temperature sensor is used for collecting temperature data of the two low-power platform charger cores in a working state, and when any temperature of the two low-power platform charger cores in the vehicle-mounted charger is greater than T1 ℃, the low-power platform charger cores with the temperature greater than T1 ℃ are closed to work;
when the temperatures of the two low-power platform charger cores C1 and C2 in the vehicle-mounted charger are both greater than T1 ℃, firstly disconnecting one of the low-power platform charger cores, so that after one of the low-power platform charger cores is operated for a set time T, if the vehicle-mounted charger cores in a temperature operating state are still greater than T1 ℃, the operating low-power platform charger cores are also closed, so that the two charger cores of the charger are not operated to close the charging, and the charging safety and reliability are ensured; or when the temperatures of the two low-power platform charger cores C1 and C2 in the vehicle-mounted charger are both greater than T1 ℃, disconnecting one of the low-power platform charger cores, and alternately controlling the two cores C1 and C2 to work if the temperatures are reduced after one of the low-power platform charger cores is operated for a set time T, wherein the temperature is lower than T3, and the T3 is lower than T1;
the battery management system BMS is connected with the battery temperature sensor and is used for collecting temperature data of the battery, and when the temperature of the battery is greater than a set threshold T2 ℃, the charging power of the vehicle-mounted charger is limited; the BMS sends a control signal to the vehicle-mounted charger controller to control one of the cores C1 and C2 in the charger to work, and the charger controller controls the core of the charger with relatively lower temperature to work according to the temperatures of the cores C1 and C2; detecting the temperature of the battery in real time after the core of one charger is adopted to work, stopping charging when the temperature is still greater than T2, and closing both cores C1 and C2 of the charger;
the low-voltage trolley-mounted charging device comprises a low-voltage trolley and is characterized by further comprising a charger controller, wherein the charger controller is used for performing CAN communication on a BMS and a VCU respectively and is used for exchanging charging control command signals; the output end of the charger controller is connected with each low-power platform charger core to drive the low-power platform charger core to work; the low-power platform charger cores are connected with a relay in series to form a charger core module, and the two charger core modules are connected in parallel and then are led out of an input/output terminal for being respectively connected with a charging socket and a power battery; the charger controller is connected with the man-machine interaction module and is used for acquiring the two low-power platform charger core working modes sent by the man-machine interaction module and controlling the work of the two low-power platform charger cores based on the working modes; when the battery charger controller does not acquire the working modes of the two low-power platform battery charger cores sent by the man-machine interaction module, entering a default working mode, and controlling and driving the two low-power platform battery charger cores to be in a working state in the default working mode; the man-machine interaction module comprises a vehicle-mounted multimedia system, an instrument system, a master control system and/or a vehicle networking system.
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| CN202111528698.0A CN114148195B (en) | 2021-12-14 | 2021-12-14 | Low-voltage flat-bed electric automobile charging system |
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| CN105207303A (en) * | 2015-10-20 | 2015-12-30 | 西安特锐德智能充电科技有限公司 | Charging system and method for charger of electric car |
| CN106427624A (en) * | 2016-10-11 | 2017-02-22 | 北京新能源汽车股份有限公司 | Charging control method, device and equipment and electric automobile |
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