CN211577364U - Intelligent battery test system based on Internet of things - Google Patents
Intelligent battery test system based on Internet of things Download PDFInfo
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- CN211577364U CN211577364U CN201921992079.5U CN201921992079U CN211577364U CN 211577364 U CN211577364 U CN 211577364U CN 201921992079 U CN201921992079 U CN 201921992079U CN 211577364 U CN211577364 U CN 211577364U
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Abstract
The utility model discloses an intelligent battery test system based on the Internet of things, which comprises an upper computer, more than two middle computers communicated with the upper computer through a network switch, and each middle computer is communicated with an Internet of things system and more than two lower computers; the lower computer is used for charging and discharging the battery, and the circuit of the lower computer is divided into an alternating current side AC/DC part and a direct current side DC/DC part. The utility model discloses a test system has following characteristics: a formula editing function is added in a common battery test flow, and a user can define variables to control the operation and the skip of charging and discharging equipment, wherein the editable variables comprise but are not limited to: voltage, current, charge capacity, discharge capacity, charge energy, discharge energy, auxiliary voltage, auxiliary temperature, BMS total pressure, BMS maximum cell voltage, BMS minimum cell voltage, BMS maximum cell temperature, BMS minimum cell temperature, and the like.
Description
Technical Field
The utility model belongs to battery test field, in particular to intelligent battery test system based on thing networking in this field.
Background
The new energy automobile belongs to the industry which is mainly supported and developed in the long-term development planning in China. The power battery pack system is the core of the electric automobile, is also the biggest bottleneck in the technology and cost of the new energy automobile, is the most central ring in the industry chain, and the development of the power battery pack system directly influences the industrialization process of the electric automobile, and the power battery pack detection technology also directly influences the quality of the power battery pack. At present, most of battery pack test systems can only complete simple test functions and single interface expansion, and the complex test task requirements and intelligent control of users are difficult to meet.
At present, a battery pack testing system belongs to a relatively mature industry, and provides a plurality of charging and discharging testing functions such as constant voltage, constant current, constant power, constant load, current step, current slope, pulse charging, working condition simulation and the like for a user.
Most current battery pack testing systems have the following disadvantages: constant voltage, constant current and other charge and discharge control edit a test task according to fixed values of variables (such as voltage 4.2V and current 20A), and the jump and cut-off of the test task are also based on the fixed values (such as the capacity is greater than 2 ampere, the voltage is greater than 4V), but in practical application, a user needs to control more flexible application such as parameter variability and the like, and common test tasks cannot meet requirements; the BMS communication with the battery pack is generally supported, but the BMS data are simply uploaded to an upper computer to be displayed, and the BMS data are not effectively utilized; user testing tasks are more and more complex and more intelligent, and the expandability of a general testing system is poor; and key information such as system alarm and the like is not reflected timely, so that safety accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an intelligent battery test system based on thing networking is provided exactly.
The utility model adopts the following technical scheme:
the utility model provides an intelligent battery test system based on thing networking, its improvement lies in: the system comprises an upper computer, more than two middle computers and a network switch, wherein the more than two middle computers are communicated with the upper computer through the network switch; the lower computer is used for charging and discharging the battery, the circuit of the lower computer is divided into an AC/DC part at an AC side and a DC/DC part at a DC side, the AC/DC part consists of a three-phase PWM rectifier, and the DC/DC part consists of a bidirectional Buck/Boost converter; the middle position machine comprises a third-party interface unit, an analog charging pile unit, a channel parallel unit, an offline operation unit, a power failure recovery unit and an auxiliary sampling unit; the Internet of things system comprises an intelligent data acquisition terminal and an Internet of things management cloud platform, wherein the intelligent data acquisition terminal is communicated with the middle position machine, and the Internet of things management cloud platform collects data acquired by the intelligent data acquisition terminal.
Further, a server and a printer communicate with the upper computer through a network switch.
Further, the devices that the mid-position machine third party interface unit can access include, but are not limited to, BMS, walk-in incubator, dc controllable power supply and battery pressure sensor.
The improvement of a test method using the intelligent battery test system is as follows: the upper computer edits the test task operated by the lower computer, displays the operation state of the lower computer, stores and records the test data, and performs statistical analysis on the data; the middle computer is a communication bridge between the upper computer and the lower computer, forwards data and commands between the upper computer and the lower computer, and manages the channel parallel unit, the off-line operation unit and the third-party interface unit; the lower computer is an execution mechanism of the test system, corresponding control processes are executed according to test tasks, the control channel is charged and discharged, test data are collected and uploaded, and the internet of things system collects operation information of the lower computer and the middle computer, so that a user can conveniently obtain the operation information at any time.
Furthermore, in the charging stage of the lower computer, the three-phase PWM rectifier is responsible for rectifying, providing stable direct-current bus voltage and realizing unit power factor control, and the bidirectional DC/DC converter works in a chopping voltage reduction mode to charge the battery; in the discharging stage, the bidirectional DC/DC converter works in a boosting working mode, the three-phase PWM rectifier is responsible for inversion, the voltage of the direct-current bus is stabilized, and the discharging energy of the battery is fed back to the power grid; the system adopts voltage and current double closed-loop control, can accurately control output voltage and output current respectively, can control the operation and the jump of a lower computer by user-defined variables, and can realize constant voltage, constant current, constant power, constant load, current step, current slope, pulse charging, working condition simulation and direct current internal resistance test control by changing a closed-loop structure and voltage and current loop reference given signals.
Further, user-defined variables include, but are not limited to: voltage, current, charge capacity, discharge capacity, charge energy, discharge energy, auxiliary voltage, auxiliary temperature, BMS total pressure, BMS maximum cell voltage, BMS minimum cell voltage, BMS maximum cell temperature, and BMS minimum cell temperature.
Further, the intermediate computer is communicated with the upper computer: receiving and processing an upper computer command, saving a task file and uploading lower computer data; the middle computer is communicated with the lower computer: sending a lower computer command and receiving lower computer data; when the lower computer is offline, the operation of the lower computer is maintained to be not stopped, and offline data are stored; the middle computer acquires the auxiliary channel sampling data, uploads the auxiliary channel sampling data to the upper computer and supports off-line operation; the central computer sends system operation key information to the Internet of things system; the parallel connection of the channels of the middle computer means that the middle computer can manage the on-line lower computers to operate in parallel at will, and the output capacity is increased; the middle computer can simulate the real-time communication between the charging pile and the battery pack BMS, and controls the lower computer to operate in a charging pile mode.
Furthermore, information collected by the middle computer is uploaded to the Internet of things management platform through the intelligent terminal, the platform stores and analyzes data, and management and alarm service is provided through mobile application of the Internet of things.
The utility model has the advantages that:
the utility model discloses a test system and test method have following characteristics:
a formula editing function is added in a common battery test flow, and a user can define variables to control the operation and the skip of charging and discharging equipment, wherein the editable variables comprise but are not limited to: the battery pack comprises a voltage, a current, a charging capacity, a discharging capacity, a charging energy, a discharging energy, an auxiliary voltage, an auxiliary temperature, a BMS total pressure, a BMS maximum monomer voltage, a BMS minimum monomer voltage, a BMS maximum monomer temperature, a BMS minimum monomer temperature and the like (for example, when the battery capacity is applied, a user can define the current of 0.5C and the current of 2C for charging and discharging according to the reference capacity and can also control the charging and discharging of the battery to be 50% of the reference capacity for stopping), variables and coefficients edited by a formula are variable, and the complex testing task requirements of the user are met;
the system can be configured to simulate a charging pile mode, is in real-time communication with the BMS, and charges the battery pack in the charging pile mode to realize the charging pile function;
the system accesses BMS data through the DBC file, can control equipment to operate according to BMS charging and discharging requirements, and can also control equipment to jump and cut off according to BMS total pressure and monomer voltage and temperature.
BMS data is an important source for monitoring the battery pack, the system can be connected with various battery pack BMSs through standard DBC files, the BMS data is analyzed, the charging and discharging voltage and current output of testing equipment is controlled according to the BMS data, and the skipping or stopping of testing tasks can be controlled;
the system has abundant interfaces, can flexibly expand third-party equipment, such as a BMS (battery management system), a step-in incubator, a direct-current controllable power supply, a battery pressure sensor and the like, can acquire information of the third-party equipment to control charging and discharging of the equipment, and can adjust output of the third-party equipment according to a battery test task to realize intelligent control;
the system is accessed to the Internet of things management platform, the key information of equipment operation is transmitted to the cloud server, and the mobile application can present the information to the user at the first time, so that the safety strain capacity of the system is greatly improved.
Drawings
FIG. 1 is a general block diagram of the test system of the present invention;
FIG. 2 is a schematic block diagram of the central computer of the testing system of the present invention;
FIG. 3 is a system function composition diagram of the upper computer of the testing system of the present invention;
fig. 4 is a diagram of the testing system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 1, this embodiment discloses an intelligent battery test system based on the internet of things, which includes an upper computer, and more than two middle computers communicating with the upper computer through a network switch, each of the middle computers communicating with an internet of things system and more than two lower computers; the lower computer is used for charging and discharging the battery, the circuit of the lower computer is divided into an AC/DC part at an AC side and a DC/DC part at a DC side, the AC/DC part consists of a three-phase PWM rectifier, and the DC/DC part consists of a bidirectional Buck/Boost converter; the middle position machine comprises a third-party interface unit, an analog charging pile unit, a channel parallel unit, an offline operation unit, a power failure recovery unit and an auxiliary sampling unit; the Internet of things system comprises an intelligent data acquisition terminal and an Internet of things management cloud platform, wherein the intelligent data acquisition terminal is communicated with the middle position machine, and the Internet of things management cloud platform collects data acquired by the intelligent data acquisition terminal. And the server and the printer are communicated with the upper computer through a network switch. The equipment that the third party interface unit of the central computer can be accessed comprises but is not limited to BMS, a walk-in incubator, a direct current controllable power supply and a battery pressure sensor.
The lower computer circuit is divided into an AC/DC (alternating current side) part and a DC/DC (direct current side) part, the AC/DC part is composed of a three-phase PWM rectifier, and the DC/DC part is composed of a bidirectional Buck/Boost converter. In the charging stage, the three-phase PWM rectifier is responsible for rectifying, providing stable direct current bus voltage, realizing unit power factor control, and the bidirectional DC/DC converter works in a chopping voltage reduction mode to charge the battery. In the discharging stage, the bidirectional DC/DC converter works in a boosting working mode, the three-phase PWM rectifier is responsible for inversion, and the discharging energy of the battery is fed back to the power grid by still taking the stable DC bus voltage as a target.
The system adopts voltage and current double closed-loop control, and can accurately control output voltage and output current respectively, so that various control functions of constant voltage, constant current, constant power, constant load, current step, current slope, pulse charging, working condition simulation, direct current internal resistance test and the like can be realized by changing a closed-loop structure and voltage and current loop reference given signals through proper strategy combination, and the system is effectively applied to battery charging and discharging equipment.
The middle computer is a transmission link between the upper computer and the lower computer, and the functional block diagram of the middle computer is shown in fig. 2. The functions of the central computer are mainly divided into the following parts:
and (3) communication with an upper computer: and receiving and processing the command of the upper computer, saving the task file and uploading the data of the lower computer.
Communication with a lower computer: and sending a lower computer command and receiving lower computer data. And when the lower computer is offline, keeping the operation of the lower computer not stopped, and storing offline data.
Auxiliary sampling: and acquiring auxiliary channel sampling data, uploading the auxiliary channel sampling data to an upper computer, and supporting off-line operation.
Communication of the Internet of things: and key information of system operation is sent to the Internet of things system, so that a user can conveniently obtain the key information in time.
And (4) expanding functions: the method comprises the steps of connecting channels in parallel and simulating the charging pile function. The channel parallel connection means that the middle position machine can manage the on-line lower position machines to operate in parallel at will, and the output capacity is increased. The simulation fills electric pile function and indicates that the host computer can simulate filling electric pile and battery package BMS real-time communication, and the control host computer is in order to fill electric pile mode operation.
A third party interface: the meso position machine has abundant interface for articulate third party's equipment, like BMS, incubator, pressure sensor etc. can control charge and discharge equipment operation and jump according to third party's information, improved the efficiency of test, and the scalable agreement is along with battery test task control regulation third party's equipment output, realizes automation mechanized operation.
The upper computer is a man-machine interaction interface of the whole system and is a direct tool for a user to operate, check, analyze and manage. The functional components of the upper computer software are as shown in fig. 3, and mainly comprise: monitoring software, a data analyzer and a task editor.
The monitoring software monitors and controls the operation of the battery charging and discharging equipment, controls the operation of the equipment such as starting, stopping and recovering, receives and stores and displays the data collected by the central computer, controls the hardware calibration, manages the related data and performs alarm processing.
The data analyzer provides convenient test data viewing, processing and exporting functions for users. The data analyzer provides graphic and tabular data display, statistics of data information, and can retrieve related data for data comparison, data printing, data export, report generation, and the like.
The task editor is an interface for a user to directly edit the running task of the equipment and is used for directly controlling the execution steps of the test process, and each step comprises a specific control mode, a skip condition, a recording condition and the like. Different alarm limits can be set by the user for different test tasks. The task editor also has a formula editing function, and a user can customize a function and set a formula as a control condition or a jump condition, and also can be used as a safety limit value for terminating a control program, wherein editable variables include but are not limited to: voltage, current, charge capacity, discharge capacity, charge energy, discharge energy, auxiliary voltage, auxiliary temperature, BMS total pressure, BMS maximum cell voltage, BMS minimum cell voltage, BMS maximum cell temperature, BMS minimum cell temperature, and the like. In addition, the task editor has a test flow secrecy function, and can carry out secrecy setting on a single test flow, and each operator can only change the set flow through password use.
The system diagram of the internet of things is shown in fig. 4 and mainly comprises an intelligent data acquisition terminal, an internet of things management cloud platform and an internet of things mobile application. The key operation information of the battery charging and discharging system is collected by the central computer, is uploaded to the Internet of things management platform through the intelligent terminal, and the platform stores and analyzes data and provides management and alarm service through Internet of things mobile application. The mobile application of the Internet of things comprises a mobile APP, a WeChat public number, a small program and other modes, and can effectively track the running condition of equipment in time, so that a user can make relevant processing at the first time.
The embodiment also discloses a testing method, wherein the intelligent battery testing system is used, the upper computer edits a testing task operated by the lower computer, displays the operation state of the lower computer, stores and records testing data, and performs statistical analysis on the data; the middle computer is a communication bridge between the upper computer and the lower computer, forwards data and commands between the upper computer and the lower computer, and manages the channel parallel unit, the off-line operation unit and the third-party interface unit; the lower computer is an execution mechanism of the test system, corresponding control processes are executed according to test tasks, the control channel is charged and discharged, test data are collected and uploaded, and the internet of things system collects operation information of the lower computer and the middle computer, so that a user can conveniently obtain the operation information at any time.
The test system and the test method disclosed by the embodiment have the following characteristics:
a formula editing function is added in a common battery test flow, and a user can define variables to control the operation and the skip of charging and discharging equipment, wherein the editable variables comprise but are not limited to: voltage, current, charge capacity, discharge capacity, charge energy, discharge energy, auxiliary voltage, auxiliary temperature, BMS total pressure, BMS maximum cell voltage, BMS minimum cell voltage, BMS maximum cell temperature, BMS minimum cell temperature, and the like;
the system can be configured to simulate a charging pile mode, is in real-time communication with the BMS, and charges the battery pack in the charging pile mode to realize the charging pile function;
the system accesses BMS data through the DBC file, can control equipment to operate according to BMS charging and discharging requirements, and can also control equipment to jump and cut off according to BMS total pressure and monomer voltage and temperature.
Claims (3)
1. The utility model provides an intelligent battery test system based on thing networking which characterized in that: the system comprises an upper computer, more than two middle computers and a network switch, wherein the more than two middle computers are communicated with the upper computer through the network switch; the lower computer is used for charging and discharging the battery, the circuit of the lower computer is divided into an AC/DC part at an AC side and a DC/DC part at a DC side, the AC/DC part consists of a three-phase PWM rectifier, and the DC/DC part consists of a bidirectional Buck/Boost converter; the middle position machine comprises a third-party interface unit, an analog charging pile unit, a channel parallel unit, an offline operation unit, a power failure recovery unit and an auxiliary sampling unit; the Internet of things system comprises an intelligent data acquisition terminal and an Internet of things management cloud platform, wherein the intelligent data acquisition terminal is communicated with the middle position machine, and the Internet of things management cloud platform collects data acquired by the intelligent data acquisition terminal.
2. The intelligent battery test system based on the internet of things of claim 1, characterized in that: and the server and the printer are communicated with the upper computer through a network switch.
3. The intelligent battery test system based on the internet of things of claim 1, characterized in that: the equipment that the third party interface unit of the central computer can be accessed comprises a BMS, a step-in incubator, a direct-current controllable power supply and a battery pressure sensor.
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| CN201921992079.5U CN211577364U (en) | 2019-11-18 | 2019-11-18 | Intelligent battery test system based on Internet of things |
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| CN201921992079.5U CN211577364U (en) | 2019-11-18 | 2019-11-18 | Intelligent battery test system based on Internet of things |
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