CN108790871B - Charging equipment for electric vehicle - Google Patents
Charging equipment for electric vehicle Download PDFInfo
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- CN108790871B CN108790871B CN201810539106.7A CN201810539106A CN108790871B CN 108790871 B CN108790871 B CN 108790871B CN 201810539106 A CN201810539106 A CN 201810539106A CN 108790871 B CN108790871 B CN 108790871B
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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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention is applicable to the technical field of charging, and provides electric vehicle charging equipment, which comprises a charging circuit and a current closed-loop feedback circuit; the current closed-loop feedback circuit comprises a current control module, a current sensing module, a main control module and an Internet of things module; the first input end of the current control module is connected with the output end of the charging circuit, and the first output end of the current control module is connected with the input end of the current sensing module; the first output end of the current sensing module is connected with the first input end of the main control module, and the second output end of the current sensing module is connected with the electric vehicle; the second input and output end of the main control module is connected with the input and output end of the Internet of things module, and the third input and output end of the main control module is connected with the second input and output end of the current control module. The invention can monitor the output of the current of the electric vehicle charging equipment in the charging process so as to protect the electric vehicle charging equipment and prevent accidents.
Description
Technical Field
The invention belongs to the technical field of charging, and particularly relates to electric vehicle charging equipment.
Background
With the rapid development of the economy in China, the transportation means are greatly improved, and the electric vehicle is used as a new transportation means newly developed in recent years and has the advantages of portability, environmental protection, economy and the like which are not possessed by many other transportation means. The safe and environment-friendly electric vehicle replaces a motorcycle, and is a national industry guide which can not be contended any more under the condition that the urban traffic pressure and the environmental protection pressure of China reach the extreme; meanwhile, along with the new and perfect road construction and road conditions of China urban and rural areas, the electric bicycle with better efficiency, economy and practicability replaces the traditional bicycle, and is also an irreversible market demand trend. As the name suggests, electric vehicles need electric power to maintain work, and electric vehicle charging equipment is a kind of "power-on" equipment, and can charge electric bicycles, electric vehicles, scooter for the elderly, etc.
However, the existing electric vehicle charging equipment cannot monitor the output of current in the charging process in real time, and cannot effectively monitor and take measures when the current is too large due to external conditions, so that accidents such as equipment damage, external overheat and fire can be possibly caused.
Disclosure of Invention
In view of the above, the embodiment of the invention provides an electric vehicle charging device, which solves the problems that the electric vehicle charging device in the prior art cannot monitor the output of current in the charging process in real time and protects the electric vehicle charging device in real time.
A first aspect of an embodiment of the present invention provides an electric vehicle charging apparatus, including a charging circuit and a current closed-loop feedback circuit;
the current closed-loop feedback circuit comprises a current control module, a current sensing module, a main control module and an Internet of things module;
the current control module is respectively connected with the charging circuit and the current induction module;
the first input end of the current control module is connected with the output end of the charging circuit, and the first output end of the current control module is connected with the input end of the current sensing module;
the first output end of the current sensing module is connected with the first input end of the main control module, and the second output end of the current sensing module is connected with the electric vehicle;
the second input and output end of the main control module is connected with the input and output end of the Internet of things module, and the third input and output end of the main control module is connected with the second input and output end of the current control module;
the current sensing module senses the output current of the current control module;
the main control module calculates the actual output current of the current control module according to the induced current;
the internet of things module or the main control module controls the working state of the current control module according to the actual output current of the current control module.
With reference to the first aspect of the present invention, in a first implementation manner of the first aspect of the present invention, the internet of things module is further connected to a terminal device;
and the terminal equipment acquires the actual output current of the current control module.
With reference to the first aspect and the implementation manners of the first aspect of the present invention, the internet of things module includes a communication unit and a cloud server;
the communication unit is connected with the cloud server, and the input and output ends of the communication unit are connected with the second input and output ends of the main control module;
and the terminal equipment is connected with the cloud server.
With reference to the first aspect and the implementation manners of the first aspect, the communication unit includes a GSM/GPRS/4G/5G/NBIOT chip, a ZigBee chip, a bluetooth chip, or a Wi-Fi chip.
With reference to the first aspect of the present invention, in a second embodiment of the first aspect of the present invention, the main control module includes a first control unit;
the first control unit controls the working state of the current control module according to the actual output current of the current control module.
In a second embodiment of the first aspect of the present invention, the main control module further includes a second control unit;
the second control unit receives the instruction of the terminal equipment through the Internet of things module and controls the working state of the circuit control module according to the instruction of the terminal equipment.
The terminal equipment comprises portable electronic equipment or a desktop computer.
With reference to the first aspect of the present invention, in a third embodiment of the first aspect of the present invention, the current closed loop feedback circuit further includes a current processing module;
the input end of the current processing module is connected with the first output end of the current sensing module, and the output end of the current processing module is connected with the first input end of the main control module;
the current processing module processes the induced current.
In a third embodiment of the first aspect of the present invention, the current processing module includes an operational amplifying unit and a filtering unit;
the operational amplification unit is connected with the filtering unit;
the input end of the operational amplification unit forms the input end of the current processing module and is connected with the first output end of the current sensing unit;
the output end of the filtering unit forms the output end of the current processing module and is connected with the first input end of the main control module.
With reference to the first aspect of the present invention, in a fourth embodiment of the first aspect of the present invention, the main control module further obtains a working state of the current control module.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: according to the embodiment of the invention, the current closed-loop feedback circuit mainly composed of the current control module, the current sensing module, the main control module and the Internet of things module is added into the original charging circuit of the electric vehicle, so that the actual output current of the current control module is monitored after the charging circuit in the charging equipment of the electric vehicle is output to the current control module, the output current of the charging circuit in the charging equipment of the electric vehicle is effectively controlled, the charging equipment of the electric vehicle is effectively protected, and accidents are prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electric vehicle charging device according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric vehicle charging device according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electric vehicle charging device according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of another electric vehicle charging device according to the third embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The term "comprising" in the description of the invention and the claims and in the above figures and any variants thereof is intended to cover a non-exclusive inclusion. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include additional steps or elements not listed or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
Example 1
As shown in fig. 1, the electric vehicle charging device 100 provided in this embodiment includes a charging circuit 10 and a current closed-loop feedback circuit 20, where the current closed-loop feedback circuit 20 includes a current control module 21, a current sensing module 22, a main control module 23, and an internet of things module 24.
In the present embodiment, the connection relationship of each module in the electric vehicle charging apparatus 100 is as follows:
the first input end of the current control module 21 is connected with the output end of the charging circuit 10, the first output end of the current control module 21 is connected with the input end of the current sensing module 22, the current control module 21 is connected with the current in the charging circuit 10, and the current sensing module 22 is also connected with the current in the charging circuit 10 through the current control module 21; the first output end of the current sensing module 22 is connected with the first input end of the main control module 23, the second output end of the current sensing module 22 is connected with the electric vehicle, the main control module 23 is connected with the sensing current output by the current sensing module 22, and the electric vehicle is connected with the voltage and the current output by the charging circuit 10 through the current sensing module 22; the second input and output end of the main control module 23 is connected with the input and output end of the internet of things module 24, the third input and output end of the main control module 23 is connected with the second input and output end of the current control module 21, and the current control module 21 is connected with a control signal in the main control module 23.
In the present embodiment, the current control module 21 is used for controlling whether the output of the charging circuit is transmitted to the current sensing module.
In a specific application, the current control module can be arbitrary, can realize two states of circuit open-circuit and conduction, and can change a circuit structure or an electronic component according to instructions, such as a control loop, a singlechip switch and the like. In this embodiment, the function in the current control module is implemented by a control loop in which the controller determines the output according to a certain rule and algorithm based on the input, the input and output forming a loop. In this embodiment, the control loop only determines the output or non-output of the current, and does not change the output of the current.
In this embodiment, the current sensing module 22 is used for sensing the output current of the current control module and sending the output current to the main control module connected with the current sensing module.
In a specific application, the current sensing module may be any circuit structure or electronic component, such as a current transformer and a current sensor, which can obtain the sensed current from the output of the circuit and output the sensed current respectively. In this embodiment, the current transformer is used as a current sensing module to realize the function of the current sensing module; in the working process of the electric vehicle charging equipment, the primary current output by the current control module with larger value can be converted into the secondary current with smaller value through the current transformer, so that the safety measurement of the current by the subsequent main control module is ensured.
In this embodiment, the main control module 23 is configured to calculate an actual output current of the current control module according to the induced current output by the current sensing module, and send the actual output current to the internet of things module connected with the current control module.
In specific applications, the main control module can be any circuit structure or electronic components capable of realizing data calculation and transmission of circuit control instructions, such as an embedded system formed by a singlechip and a microcontroller. In this embodiment, the main control module adopts an embedded system composed of STM32 microcontrollers, uses the current (i.e., induced current) output by the converted current control module as basic data, obtains the actual output current of the current control module through ac-dc conversion calculation, and sends the actual output current to the internet of things module.
In one embodiment, the main control module may further obtain a working state of the current control module, and send the working state to the internet of things module.
In a specific application, the working state of the current control module directly reflects the working state of the electric vehicle charging equipment, specifically, the working state of the current control module determines whether the connection between the charging circuit and the current sensing module is on or not, so that whether the internal circuit of the electric vehicle charging equipment is conducted or not is controlled, namely, whether an external power supply can charge the electric vehicle through the electric vehicle charging equipment is controlled. When the current control module is closed, the electric vehicle charging equipment cannot be connected with power supply; when the current control module is started, power supply is normally connected to the electric vehicle charging equipment, and the electric vehicle is normally charged. Therefore, the working state of the electric vehicle is obtained by the Internet of things module through the main control module.
In this embodiment, the internet of things module 24 or the main control module 23 is configured to control the working state of the current control module according to the actual output current of the current control module.
In one embodiment, the internet of things module may be further connected to a terminal device, where the terminal device accesses the actual output current of the current control module sent by the master control module to the internet of things module, so as to display the actual output current in the current control module.
In a specific application, the internet of things module comprises a communication unit and a cloud server, wherein the communication unit is connected with the cloud server, the input and output ends of the communication unit are connected with the second input and output ends of the main control module, and current data in the main control module are accessed and sent to the cloud server; the terminal equipment is connected with the cloud server and is accessed to current data in the communication unit.
In a specific application, the communication unit may be any internet of things chip capable of establishing a communication relationship between the master control module and the cloud server, such as a GSM (Global System for Mobile Communication, global system for mobile communications)/GPRS (General Packet Radio Service, general packet radio service technology) chip/4G/5G/NBIOT/ZigBee (wireless personal area network) chip, a bluetooth chip, or a Wi-Fi (wireless local area network) chip.
In a specific application, because the cloud server is a server capable of providing basic cloud computing service, the working state of the current control module can be controlled through the internet of things module according to the actual output current of the current control module calculated in the main control module; the working state of the current control module can also be controlled by the main control module.
The working principle of the electric vehicle charging equipment provided by the embodiment is as follows:
when the charging equipment of the electric vehicle works normally, the current control module is in an on state, the charging circuit is conducted with the current sensing module, the current sensing module continuously sends sensing current to the main control module on one hand, and current (equivalent to the current output by the current control module) output by the charging circuit is sent to the electric vehicle on the other hand, so that the electric vehicle is in a charging state; meanwhile, the main control module calculates actual output current data of the current control module according to the induction current output by the current induction module and sends the actual output current data to the internet of things module, so that terminal equipment connected with the internet of things module obtains the current data, when the electric vehicle charging equipment works normally, the actual output current of the current control module is similar to the current of the normal work, and then the main control module enables the current control module to be in a starting state continuously. When the electric vehicle charging equipment works abnormally, namely, the main control module calculates that the actual output current of the current control module is higher than the normal working current according to the induction current output by the current induction module, the main control module or the Internet of things module can control the current control module to be in a closing state so as to shut off the electrical connection relationship in the electric vehicle charging equipment and protect the electric vehicle charging equipment and the electric vehicle.
According to the electric vehicle charging equipment provided by the embodiment, the current closed loop feedback circuit mainly comprising the current control module, the current induction module, the main control module and the Internet of things module is added in the original charging circuit of the electric vehicle, so that the real-time monitoring of the actual output current of the current control module after the charging circuit in the electric vehicle charging equipment is output to the current control module is realized, the output current of the charging circuit in the electric vehicle charging equipment is effectively controlled, the charging process of the electric vehicle charging equipment is effectively protected, and accidents are prevented.
Example two
As shown in fig. 2, in the electric vehicle charging device 100 according to the first embodiment, the main control module 23 includes a first control unit 231.
In this embodiment, the first control unit controls the working state of the current control module according to the actual output current of the current control module.
In a specific application, if the actual output current of the current control module is greater than the normal working current, the first control unit controls the current control module to be closed so as to shut off the electrical connection relationship between the charging circuit in the electric vehicle charging equipment and the electric vehicle. The first control unit is a functional unit in the main control module for automatically controlling the working state of the current control module according to the actual output current of the current control module.
As shown in fig. 2, the main control module 23 in this embodiment further includes a second control unit 232.
In this embodiment, the second control unit receives the instruction of the terminal device through the internet of things module, and controls the working state of the circuit control module according to the instruction of the terminal device.
In a specific application, the terminal equipment acquires the actual output current of the current control module through the cloud server, and when the actual output current of the current control module is larger than the normal working current, an instruction in the terminal equipment can be sent to the main control module through the Internet of things module so as to control the working state of the current control module; when the electric vehicle charging equipment needs to be actively turned off, the instruction in the terminal equipment can be sent to the main control module through the internet of things module, and the current control module is turned off in time. The second control unit is a functional unit in the main control module for controlling the working state of the current control module according to the instruction of the terminal equipment.
In a specific application, the terminal device may comprise a portable electronic device or a desktop computer.
According to the electric vehicle charging equipment provided by the embodiment, the current closed-loop feedback circuit mainly comprising the current control module, the current induction module, the main control module and the Internet of things module is added into the original charging circuit of the electric vehicle, so that real-time monitoring of the actual output current of the current control module after the charging circuit in the electric vehicle charging equipment is output to the current control module is realized. On the one hand, the working state of the current control module is automatically controlled by the first control unit according to the actual output current of the current control module; on the other hand, the second control unit receives the instruction of the terminal equipment through the Internet of things module and controls the working state of the circuit control module according to the instruction of the terminal equipment; from the two aspects of automatic control and remote control, the control of the output current of the charging circuit in the electric vehicle charging equipment is realized, the electric vehicle charging equipment is effectively protected, and accidents are prevented.
Example III
As shown in fig. 3, in the electric vehicle charging device 100 according to the first embodiment, the current closed-loop feedback circuit 20 further includes a current processing module 25.
In the present embodiment, the connection relationship between the current processing module 25 and each module in the electric vehicle charging device 100 provided in the first embodiment is as follows:
the input end of the current processing module 25 is connected with the first output end of the current sensing module 22, and the output end of the current processing module 25 is connected with the first input end of the main control module 23.
In this embodiment, the current processing module 25 is used to process the induced current.
In a specific application, the output induced current in the current induction module is unstable, and the accuracy of calculating the actual output current of the current control module according to the induced current in the main control module is affected.
As shown in fig. 4, in the electric vehicle charging device 100 provided in the present embodiment, the current processing module 25 includes an operational amplification unit 251 and a filtering unit 252.
In the present embodiment, the connection relationship between each unit in the current processing module 25 and each module in the electric vehicle charging apparatus 100 is as follows:
the operational amplification unit 251 is connected with the filtering unit 252; the input end of the operational amplification unit 251 constitutes the input end of the current processing module 25 and is connected with the first output end of the current sensing unit 22; the output end of the filtering unit 252 forms an output end of the current processing module 25 and is connected to a first input end of the main control module 23.
In a specific application, the induced current output by the current induction module is amplified, rectified and filtered, so that the induced current output to the main control module is stable, and the main control module can calculate the actual output current of the current control module according to the induced current.
According to the electric vehicle charging equipment provided by the embodiment, the current closed-loop feedback circuit mainly comprising the current control module, the current sensing module, the main control module and the Internet of things module is added into the original charging circuit of the electric vehicle, so that the real-time monitoring of the actual output current of the current control module after the charging circuit in the electric vehicle charging equipment is output to the current control module is realized, and the output current of the charging circuit in the electric vehicle charging equipment is effectively controlled. In addition, the current processing module is added between the current sensing module and the main control module, so that accuracy of calculating actual output current of the current control module according to the sensed current in the main control module is improved, and meanwhile monitoring errors of the actual output current of the current control module are avoided.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The electric vehicle charging equipment is characterized by comprising a charging circuit and a current closed-loop feedback circuit;
the current closed-loop feedback circuit comprises a current control module, a current sensing module, a main control module and an Internet of things module;
the first input end of the current control module is connected with the output end of the charging circuit, and the first output end of the current control module is connected with the input end of the current sensing module;
the first output end of the current sensing module is connected with the first input end of the main control module, and the second output end of the current sensing module is connected with the electric vehicle;
the second input and output end of the main control module is connected with the input and output end of the Internet of things module, and the third input and output end of the main control module is connected with the second input and output end of the current control module;
the current control module is used for controlling whether the output of the charging circuit is transmitted to the current induction module or not;
the current sensing module senses the output current of the current control module and sends the output current to a main control module connected with the current sensing module;
the main control module calculates the actual output current of the current control module according to the induced current;
the internet of things module or the main control module controls the working state of the current control module according to the actual output current of the current control module, wherein when the current control module is closed, power supply cannot be connected into the electric vehicle charging equipment; when the current control module is started, power supply is normally connected to the electric vehicle charging equipment, and the electric vehicle is normally charged.
2. The electric vehicle charging device of claim 1, wherein the internet of things module is further connected with a terminal device;
and the terminal equipment acquires the actual output current of the current control module.
3. The electric vehicle charging device of any one of claims 1 or 2, wherein the internet of things module comprises a communication unit and a cloud server;
the communication unit is connected with the cloud server, and the input and output ends of the communication unit are connected with the second input and output ends of the main control module;
and the terminal equipment is connected with the cloud server.
4. The electric vehicle charging device of claim 3, wherein the communication unit comprises a GSM/GPRS/4G/5G/NBIOT chip, a ZigBee chip, a bluetooth chip, or a Wi-Fi chip.
5. The electric vehicle charging device of claim 1, wherein the master control module comprises a first control unit;
the first control unit controls the working state of the current control module according to the actual output current of the current control module.
6. The electric vehicle charging device of claim 5, wherein the master control module further comprises a second control unit;
the second control unit receives the instruction of the terminal equipment through the Internet of things module and controls the working state of the current control module according to the instruction of the terminal equipment.
7. The electric vehicle charging device of claim 6, wherein the terminal device comprises a portable electronic device or a desktop computer.
8. The electric vehicle charging device of claim 1, wherein the current closed loop feedback circuit further comprises a current processing module;
the input end of the current processing module is connected with the first output end of the current sensing module, and the output end of the current processing module is connected with the first input end of the main control module;
the current processing module processes the induced current.
9. The electric vehicle charging device of claim 8, wherein the current processing module comprises an operational amplification unit and a filtering unit;
the operational amplification unit is connected with the filtering unit;
the input end of the operational amplification unit forms the input end of the current processing module and is connected with the first output end of the current sensing unit;
the output end of the filtering unit forms the output end of the current processing module and is connected with the first input end of the main control module.
10. The electric vehicle charging device of claim 1, wherein the master control module further obtains an operating state of the current control module.
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| GB201007972D0 (en) * | 2010-04-10 | 2010-06-30 | Computerized Electricity Syste | Centralized charging system for electric vehicles |
| KR20170062050A (en) * | 2015-11-27 | 2017-06-07 | 프로텍이엠에스주식회사 | Diagnosis module for applying to electric vehicle charging system |
| CN205565853U (en) * | 2016-04-22 | 2016-09-07 | 宁波高新区新诚电子有限公司 | Electric motor car battery charge protection ware |
| CN106097890A (en) * | 2016-08-05 | 2016-11-09 | 江门市地尔汉宇电器股份有限公司 | A kind of charging pile with advertisement broadcasting function and method of work thereof |
| CN206323154U (en) * | 2016-08-30 | 2017-07-11 | 烟台华迅新能源技术有限公司 | A kind of intelligent monitoring and controlling device on charging electric vehicle cable |
| CN106374599A (en) * | 2016-09-12 | 2017-02-01 | 贵州裕隆实业有限公司 | Intelligent charger of electromobile |
| CN206820519U (en) * | 2017-06-16 | 2017-12-29 | 深圳市易佰特软件有限公司 | A kind of charge-discharge circuit and portable power source |
| CN208698550U (en) * | 2018-05-30 | 2019-04-05 | 深圳市鑫悦购网络科技有限公司 | A kind of electric vehicle charging equipment |
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| CN108790871A (en) | 2018-11-13 |
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