Xiamen caimore’s dtu applied in charging pile solution based on wireless monitoring technology

Xiamen Caimore Communication Technology Co.,Ltd
2 F, 37#, Wanghai Road, Software Park 2, Xiamen,China (361009)
Contact person: Cynthia Wang E-mail: sales09@caimore.com
Skype: caimoremodem whatsapp: +86-13720875034
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Tel:+86 592 5901215 Web: www.caimore.com/emain.asp1
Xiamen Caimore’s DTU applied in charging pile solution based on
wireless monitoring technology
Key words: Wireless DTU; Industrial DTU; Charging‐pile; New energy; Internet +
1. Charging pile
Charging pile is a power plant of new energy‐powered vehicles, which is similar to
the tanker of gas station. Each charging pile is equipped with charging plug for kinds of
electric vehicle’s charging, according to different voltage levels. Electric car charging pile
uses AC, DC power supply. After brushing up the charge cards, charging pile will display
charging capacity, charge time, expense and other data, and then print documents to
achieve timing charging and metering charging.
2. Application Prospect
Since charging pile’s function is similar to tanker, this particularity purposes

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determine its constructions is characterized by multiple measured points, dispersion,
wide coverage, long communication distance, and need to focus on management.
With the rapid development of new energy vehicles, it request more flexibility and
scalability network topology structure. Therefore, it need to consider the following
issues when you choose the communication mode of electric car charging pile.
(1) The reliability of communication‐‐the communication system need to withstand
the harsh environment of long‐term and strong electromagnetic interference or noise,
and to maintain the smooth flow of communication.
(2) Construction costs‐‐it need to consider the construction cost, long‐term using
and maintenance cost in meeting the reliability of premise.
(3) Bi‐directional communication ‐‐it is not only to achieve the amount of
information uploaded, but also to achieve a controlled amount of release.
(4) Multi‐service data transfer rate‐‐with the growing volume of terminal business
in future, the communication between the master station and the sub‐station or
sub‐station to the terminal communication, will have a high request on multi‐service
data transfer rates
(5) Communication flexibility and scalability‐‐due to the characteristics of
multi‐surface control point, wide and dispersed surface, charging pile will use a standard
communication protocol. With the growing business of electric power operation and
“ALL IP” network technology’s development, IP‐based services need to be considered
bearer, and also require to facilitate the installation and construction, commissioning,
operation and maintenance.
3. Communication mode
Electric car charging pile belongs to the distribution network side, their means of
communication and distribution automation are often considered together.
Communication is a key and difficult point of distribution automation. Different regions

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and conditions will lead to various communication application; specific to the electric
car charging pile, its communication mode are wired and wireless:
(1) Wired communication
Wired communication: wired ethernet(RJ45 cable, optical fiber), industrial serial bus
cable (RS485, RS232, CAN bus wire)
The main advantages of wired Ethernet are reliable data transmission, large
network capacity; the disadvantages are wiring complexity, poor scalability and
high construction costs, inflexible.
Industrial serial bus’s (RS485, RS232, CAN bus) advantages are reliable data transmission,
simple design; the disadvantages are complex distribution network, poor scalability and
high construction costs, inflexible, low traffic capacity.
(2) Wireless communication
Wireless communication is main using carrier's wireless network data to access
services, such as: GPRS / CDMA / TD‐SCDMA / WCDMA / EVDO and 4G LTE
networks updated.
Advantages: low cost, short construction period, adaptable, scalable, and easy
to maintain and easy expansion.
Therefore, a fixed IP or dynamic IP (available binding domain) and the port number
which be provided from broadband cable networks according to 2G / 3G / 4G wireless
data transmission technology, will be set by Caimore’s wireless DTU to automatically
resolve the domain name address, connect to the service side of the charging pile
management platform, and then provide a variety of real‐time data acquisition for the
new energy and transportation industries, transmission, distribution, remote
management and control, remote wireless data transmission.
4、System composition and networking
In the past three years, Xaimen Caimore has realized the gross volume applications

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of electric vehicle charging pile items on the NARI, XJ Electric, Shenzhen BYD, and other
users, to achieve a self‐charging technology based on embedded intelligent electric car
pile end solutions and products. The overall system structure is shown as below:
Charging pile system topology
This system is consisted of AC / DC charging pile, Caimore wireless data
transmission terminal DTU, various 2G / 3G / 4G wireless networks and communications
networks, charging pile systems management platform software and so on.
1, Caimore wireless data transmission DTU provides RS232 / RS485 / RS422/TTL
interfaces for connection with charging pile. If the charge pile have a ethernet
interface, you can choose Caimore’s another series wireless router for connection;
2, Wireless DTU through a variety of wireless networks to send the data of various
charging pile for the server‐side charging system management platform by transparent
wireless way, system platform software including metering and billing system, charging

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monitoring system, power distribution monitoring system, security monitoring and
control systems.
Charging pile terminal analysis chart
Electric car charging pile uses AC and DC power supply, without refueling, aerated,
avoid to exhaust emissions & pollution of the environment, in line with China future
urban development concept of the core elements of low‐carbon.
5.System functions
The system can achieve the following functions:
1, real‐time data transmission function: Through by 2G / 3G / 4G variety of
wireless networks, DTU has a ability to transfer the real‐time data of charge pile
transparently (intact) to the server back‐end’s charging pile systems
management platform ;；
2, charging pile systems management platform software mainly realizes include
metering and billing management system, charging monitoring system, power

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distribution monitoring system, security monitoring systems that several large
pieces of application functionality;
3, remote monitoring capabilities: server management platform can monitor
the operation of the charging pile, including uploading electricity transmitter,
circuit breakers, industrial host, billing, touch screen, sensors and other
equipment operating parameters, or through wireless DTU issued various work
orders to the charging pile terminal equipment;
4, remote alarm maintenance functions: real‐time monitoring of running status
charging pile, once the fault alarm occurs, you can debug or upgrade remote
maintenance, the timely processing of abnormal charging pile terminal
problems;
5, application extensions: APP software that can access to third‐party , using
Caimore’s GPS positioning device and the corresponding system software,
directly charging the phone APP user, you can achieve on a map addressing and
navigation functions.
6. Caimore DTU wireless data transmission terminal
presentation
DTU (Data Transfer Unit), full name is the data transfer unit, to provide users with
high‐speed, always online, TCP / UDP transparent data transmission of industrial
wireless terminal devices. DTU uses high‐speed high‐performance industrial grade X86
architecture ARM9 embedded processor or high‐performance embedded processor for
real‐time operating system software support platform, large memory, embedded TCP /
IP protocol stack independent intellectual property rights, to provide users with
high‐speed , reliable, always‐on data terminals, multiple protocol conversion, virtual
private network system application.For user‐network flow control, DTU product support

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voice, messaging, data and on‐line trigger automatic disconnection timeout function.
Also supports dual data center backup, and synchronize multiple data centers to receive
data, and other functions.
6.1 Caimore DTU’s function advantages
1) Various interfaces: Provide RS232 or RS485 or TTL or RS422 or USB interface and
support all kinds of interface;
2) Perfect network support: Provide GPRS/CDMA/WCDMA/TD‐SCDMA/EVDO/LTE‐FDD/
LTE‐TDD to meet various clients request;
3) Three‐tier system protection: based on the original two (software protection +WDT +
CPU built‐in protection) system protection, it adds stair system VWM (Virtual Man
Watch) detection function to ensures that the stable & reliable system
4) Metal shell: using metal case to anti‐radiation & anti‐interference; shell and system
security isolation, lightning protection design; meeting the power requirements of safety
regulations; protection rating IP41; particularly suitable for harsh industrial control field;
5) Industrial grade design, support 5‐32V power supply
6) All wireless modules are certified by the CGD or FCC certification or CE certification;
7) Industrial CPU with stable and reliable performance, Intelligent anti‐dropped, online
testing, online maintenance, automatically reset to ensure that equipment is always
online;
8) Enlarge memory: FLASH 64Mbits, SDRAM, 256Mbits; a large enough memory to
store programs and data;
9) Automatically obtain DNS: automatically acquire DNS and no longer need manual
configuration to input DNS; avoid the serious DTU crash resulted from wrong choice of
the abnormal DNS server;
10) Complete protocol stack: the new system loaded complete TCP / IP protocol stack,
using comprehensive TCP / IP protocol stack, so that network traffic performance shows

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outstanding and the drop‐line probability dramatically reduced;
11) EMC performance outstanding: passed 3000V electrical shock test, especially
suitable for the condition of harsh industrial environments; system EMC / EMI
performance excellent and system is stable and reliable; it has passed CE certification
and EMC test;
12) Support SMS remote configuration, remote controlling, support SMS alarming;
13) Intelligent anti‐dropped, online testing, online maintenance, automatically reset to
ensure that equipment is always online;
14) Support remote WEB configuration, remote control, remote upgrade.
6.2 DTU series products qualification and testing
1, wireless communication online maintain patent technology
2, Moore Laboratory’s high and low temperature test report
3, Product Quality Inspection Detection of Fujian Institute
4, copyrights certificate
5, EMC test report
6, the state compulsory 3C certification
7.DTU "Innovation Award”
8.Shenzhen BYD user test reports
7 Caimore qualification
Certification and Honor:
2009 Caimore's GPRS DTU product was named "Innovation Award";
2011 Caimore was awarded "Best Supplier of Customer Satisfaction in China's Industrial
Control Sector"
2012 Caimore becomes a member of China Association For Quality Promotion

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2013 becomes a member of Intelligent PEB Industry Technology Innovation Strategic
Alliance;
2010 Caimore was certified as state high‐tech enterprises;
2010 Caimore was certified as state dual‐soft enterprise.
Caimore has a patented technology certificates and keep the device steady 12 software
copyrights certificate; we have set up nine regional offices, 66 agents in the domestic
to provide customers with convenient proximity Care;its registered capital is 12.8
million; and it is Xiamen focus on supporting high‐tech enterprises; 12 years of industry
research and development and industrial applications accumulation test.
8 Conclusion
Vigorously promote the charging infrastructure, solving the problem of electric
vehicle charging has been an important guarantee for the development of new energy
automotive industry, to create a public entrepreneurship, innovation and the
enhancement of public goods, "double engine" public services, to achieve steady growth,
adjusting the structure, benefits livelihood has important significance.

Xiamen caimore’s dtu applied in charging pile solution based on wireless monitoring technology

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