CN111812514A - Distributed energy storage battery detection system - Google Patents
Distributed energy storage battery detection system Download PDFInfo
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- CN111812514A CN111812514A CN202010388354.3A CN202010388354A CN111812514A CN 111812514 A CN111812514 A CN 111812514A CN 202010388354 A CN202010388354 A CN 202010388354A CN 111812514 A CN111812514 A CN 111812514A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/364—Battery terminal connectors with integrated measuring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a distributed energy storage battery detection system, which comprises: the upper computer and the detection equipment are connected through a data communication line; the detection equipment is connected with the energy storage battery to be detected; the upper computer is used for controlling the detection equipment to detect the energy storage battery to be detected; the detection equipment comprises a cabinet body, a control power supply, an AC sub-cabinet and a DC sub-cabinet which are arranged in the cabinet body; the control power supply is used for controlling power supply connection, and the AC sub cabinet converts alternating-current voltage into first direct-current voltage; the DC sub cabinet converts the first direct-current voltage into a second direct-current voltage; the DC sub-machine cabinet comprises a communication management machine and a testing device, the testing device is used for detecting standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging and constant voltage and constant current discharging of the energy storage battery to be tested, and the communication management machine is used for receiving and storing testing data of the testing device, sending the testing data to the upper computer, receiving commands of the upper computer and sending the commands to the testing device.
Description
Technical Field
The invention relates to the technical field, in particular to a distributed energy storage battery detection system.
Background
In the planning and operation of a distributed power generation system, energy storage batteries account for a large proportion of the whole system. Therefore, the method has important significance for the detection of the energy storage battery. The current energy storage battery detection device can only detect single batteries in energy storage, and the detection device has a single working mode and cannot comprehensively detect the performance of the batteries.
Disclosure of Invention
In view of the above, the present invention provides a distributed energy storage battery detection system to solve the above problems in energy storage battery detection.
Based on the above object, the present invention provides a distributed energy storage battery detection system, including: the upper computer and the detection equipment are connected through a data communication line; the detection equipment is connected with the energy storage battery to be detected; the upper computer is used for controlling the detection equipment to detect the energy storage battery to be detected and storing detection data;
the detection equipment comprises a cabinet body, a control power supply, an AC sub-cabinet and a DC sub-cabinet which are arranged in the cabinet body and are connected in parallel; the control power supply is used for controlling the power connection of the AC sub-cabinet and the DC sub-cabinet, and the AC sub-cabinet is used for converting alternating-current voltage into first direct-current voltage; the DC sub-machine cabinet is used for converting a first direct-current voltage into a second direct-current voltage; the DC sub-machine cabinet comprises a communication management machine and a testing device, the testing device is used for detecting standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging and constant voltage and constant current discharging of an energy storage battery to be tested, the communication management machine is used for receiving and storing testing data of the testing device, sending the testing data to an upper computer, receiving a command of the upper computer and sending the command to the testing device.
In one embodiment, the testing device comprises a first channel sub-cabinet and a second channel sub-cabinet, and connecting terminals of the first channel sub-cabinet and the second channel sub-cabinet are respectively connected with the positive electrode and the negative electrode of the energy storage battery to be tested through battery cables.
In one embodiment, the first channel sub-machine cabinet comprises a standing test unit, a constant voltage charging test unit, a constant current charging test unit and a constant power charging test unit, wherein the constant voltage charging test unit is used for performing a constant voltage charging test on the energy storage battery to be tested, the constant current charging test unit is used for performing a constant current charging test on the energy storage battery to be tested, and the constant power charging test unit is used for performing a constant power charging test on the energy storage battery to be tested.
In one embodiment, the second channel sub-cabinet includes a constant voltage discharge test unit, a constant current discharge test unit, a constant power discharge test unit, a constant resistance discharge test unit, and a constant voltage and constant current discharge test unit, where the constant voltage charge test unit is used to perform a constant voltage charge test on the energy storage battery to be tested, the constant current charge test unit is used to perform a constant current charge test on the energy storage battery to be tested, and the constant power charge test unit is used to perform a constant power charge test on the energy storage battery to be tested.
In one embodiment, the DC sub-rack is provided with an auxiliary power supply, and the auxiliary power supply comprises a first channel sub-rack auxiliary power supply and a second channel sub-rack auxiliary power supply, which are respectively used for controlling connection/disconnection of power supplies of the first channel sub-rack and the second channel sub-rack.
In one embodiment, the upper computer comprises a monitoring module, a process file configuration module, a command sending module, a data receiving module, a data storage module, a historical data analysis module, a log and alarm information module and a system configuration module;
the monitoring module is used for monitoring the communication state of a test channel of the test device and analyzing whether the test channel is in normal communication or not; the process file configuration module is used for setting detection modes of standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging or constant voltage and constant current discharging; the command sending module is used for sending a detection command of the currently set detection mode to the testing device for detection; the data receiving module is used for receiving the test data sent by the communication manager; the data storage module is used for storing the received test data; the historical data analysis module is used for inquiring historical data, analyzing and processing the historical data and displaying the test data in a numerical value, curve and other modes; the log and alarm information module is used for inquiring the operation record and the alarm amount; and the system configuration module is used for determining the process files and managing the user information.
In one embodiment, the cabinet body is provided with an input connection copper bar terminal and a line protection device, the input connection copper bar terminal is used for connecting a mains supply input cable, and the line protection device is connected with the input connection copper bar terminal and used for protecting a line of the input connection copper bar terminal.
In one embodiment, the line protection device comprises an overcurrent protection module, the overcurrent protection module is connected with the input connection copper bar terminal and used for performing overcurrent protection on a line of the input connection copper bar terminal, and the overcurrent protection module comprises an overcurrent protection relay drive locking circuit and an overcurrent protection circuit.
In one embodiment, the line protection device comprises a short-circuit protection device, the short-circuit protection device is connected with the input connection copper bar terminal and used for performing short-circuit protection on the line of the input connection copper bar terminal, and the short-circuit protection device comprises a short-circuit protection relay drive locking circuit and a short-circuit protection circuit.
In one embodiment, the cabinet body is provided with a BMS interface which is used for connecting a BMS of a battery to be tested.
From the above description, the distributed energy storage detection system provided by the invention sends the test command to the communication management machine arranged in the DC sub-cabinet in the detection equipment cabinet through the upper computer, and enables the communication management machine to send the command to the test device arranged in the DC sub-cabinet in the detection equipment cabinet, performs nine different tests of standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging and constant voltage and constant current discharging on the battery to be tested, obtains the performance parameters of the battery to be tested, and sends the performance parameters obtained through the test to the upper computer through the communication management machine for storage. Therefore, the system can monitor the actual working condition of the battery detection in real time, record and display the data of the battery detection in real time, and inquire and analyze historical data.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a commercial power input power cable connection terminal of a detection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a battery power cable connection terminal according to an embodiment of the present invention;
FIG. 3 is a front view of a detection apparatus of an embodiment of the present invention;
FIG. 4 is a rear view of a detection apparatus of an embodiment of the present invention;
FIG. 5 is a top view of a detection apparatus according to an embodiment of the present invention;
FIG. 6 is a bottom view of a detection device according to an embodiment of the present invention;
FIG. 7 is a view of an operation control display panel of the inspection apparatus according to the embodiment of the present invention;
FIG. 8 is a schematic diagram of the power switch position of the detection apparatus according to the embodiment of the present invention;
FIG. 9 is a schematic diagram of a page in the upper computer according to the embodiment of the present invention;
the intelligent cabinet comprises a cabinet body 100, an AC sub-cabinet 210, a DC sub-cabinet 220, a dust screen 410, a dust screen fixing frame 420, an M5 combined screw 430, an input connection copper bar terminal 510, a grounding bar terminal 520, a ventilation opening 600, a wire inlet/wire outlet 700, an auxiliary power switch 810, an input switch 820, a rectifier state indicator lamp 910, a first channel state indicator lamp 920, a second channel state indicator lamp 930, a warning lamp 940 and an emergency stop button 950.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The inventor of the invention finds that the produced energy storage lithium battery or the energy storage lithium battery used for a period of time needs to be subjected to battery detection in the long-term energy storage detection work of the distributed power generation system, so that the performance and the health condition of the energy storage lithium battery can be accurately known. However, the existing energy storage battery detection device can only simply detect a single battery, cannot detect a battery pack with a BMS battery management system, has the problems of inaccurate detection result and poor detection efficiency, and is inconvenient to use, for example, the size is huge, and the position selection, the movement and the later maintenance of the device are influenced by different degrees.
The inventor has developed a DSE series lithium battery detection system for an energy storage battery, which can perform battery detection on a battery pack without a BMS as well as a battery pack with a BMS. The equipment comprises 9 working modes of standing, constant-voltage charging, constant-voltage discharging, constant-current charging, constant-current discharging, constant-power charging, constant-power discharging, constant-resistance discharging and constant-voltage constant-current discharging, and can be operated in different working modes through process setting so as to detect performance parameters of the energy storage lithium battery. The system can monitor the actual working condition of battery detection in real time, record the data of battery detection and inquire and analyze historical data. The actual data display and the historical data query and analysis have numerical values and curves, and the user can conveniently analyze the data.
The invention provides a distributed energy storage battery detection system, which comprises: the upper computer and the detection equipment are connected through a data communication line; the detection equipment is connected with the energy storage battery to be detected; the upper computer is used for controlling the detection equipment to detect the energy storage battery to be detected and storing detection data.
As shown in fig. 1 and 2, the detection device includes a cabinet 100, a control power supply, an AC sub-cabinet 210 and a DC sub-cabinet 220 arranged in the cabinet 100 and connected side by side; the control power supply is used for controlling the on-off of the power supply connection of the AC sub-machine cabinet 210 and the DC sub-machine cabinet 220, and an ACDC converter is arranged in the AC sub-machine cabinet 210 and used for converting alternating current voltage into first direct current voltage and converting the alternating current voltage 380V into the direct current voltage 400V; a DCDC converter is arranged in the DC sub-rack 220 and is used for converting a first direct-current voltage into a second direct-current voltage, for example, converting a direct-current voltage of 400V into a direct-current voltage of 40V-200V; the DC sub-machine cabinet 220 comprises a communication management machine and a testing device, wherein the testing device is used for detecting standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging and constant voltage and constant current discharging of an energy storage battery to be tested, the communication management machine is used for receiving testing data of the testing device, sending the testing data to an upper computer, receiving a command of the upper computer and sending the command to the testing device.
The invention sends a test command to a communication manager arranged in the DC sub-cabinet 220 in the detection equipment cabinet body 100 through an upper computer, and enables the communication manager to send the command to a test device arranged in the DC sub-cabinet 220 in the detection equipment cabinet body 100, nine different detections of standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging and constant voltage and constant current discharging are carried out on the battery to be tested, so as to obtain the performance parameters of the battery to be tested, and the performance parameters obtained through the detection are sent to the upper computer through the communication manager for storage. Therefore, the system can monitor the actual working condition of the battery detection in real time, record and display the data of the battery detection in real time, and inquire and analyze historical data.
The upper computer comprises a monitoring module, a process file configuration module, a historical data analysis module, a log and alarm information module and a system configuration module.
The monitoring module is used for monitoring the communication state of a test channel of the test device and analyzing whether the test channel is in normal communication or not; the process file configuration module is used for setting any one of standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging, constant voltage and constant current discharging and the like, and can specifically realize a corresponding detection mode by setting different parameters; the historical data analysis module is used for inquiring historical data, analyzing and processing the historical data and displaying the test data in a numerical value, curve and other modes; the log and alarm information module is used for inquiring the operation record and the alarm amount; and the system configuration module is used for determining the process files and managing the user information.
Wherein, a process file can contain a plurality of process steps, and each process step corresponds to one of 9 working modes.
The upper computer also comprises a command sending module, a data receiving module and a data storage module.
The command sending module is used for sending a detection command of the currently set detection mode to the testing device for detection. The data receiving module is used for receiving the test data sent by the communication manager; and the data storage module is used for storing the received test data.
It should be noted that, in the distributed energy storage battery detection system, the detection device may be provided as a plurality of interconnected cabinets, or may be provided as a single cabinet.
Referring to fig. 3 to 6, the cabinet body 100 of the detection apparatus is provided with a ventilation opening 600 for ventilation and heat dissipation. The vent 600 may be provided at the front panel of the cabinet 100. The number of the vents 600 may be provided in plurality, and the plurality of vents 600 are adjacently provided.
The dust screen 410 and the fixing frame 420 are provided at the vent 600. The fixing frame 420 is fixed at the cabinet 100 by screws, which may be M5 combined with screws 430. The dust screen 410 is fixedly arranged at the cabinet body 100 through the dust screen fixing frame 420, so that dust and water can be prevented, and the protection effect on the cabinet body 100 can be achieved.
The cabinet body 100 is provided with a wire inlet/outlet 700, and the wire inlet/outlet 700 may be arranged at the top of the cabinet body 100 or at the bottom of the cabinet body 100. The inlet/outlet 700 is used to pass in mains input cables and cables interconnecting the cabinet to other cabinets or equipment. When the inlet/outlet 700 is disposed on the top of the cabinet, i.e. in a top wiring manner, the cables in the cabinet are connected to other cabinets or devices through the inlet/outlet holes and the upper wiring accessories of the cabinet. A wiring rack and a wiring groove (fixed on the top of the cabinet) need to be configured on the cabinet, and the wiring rack (fixed on the top of the machine room or a wall) can also be built on the machine room. The inside of the cabinet is also provided with a wire passing plate or a wire passing groove, so that the wiring or the wire binding are convenient.
The cabinet body 100 is provided with an input connection copper bar terminal 510, and the commercial power input cable is connected with the input connection copper bar terminal 510.
The wire diameter of the commercial power input cable is determined according to the maximum input current, and the maximum input current is not less than the maximum battery charging current. That is, the wire diameter of the input cable should meet the requirement of maximum input current. Specifically, when the wire diameter of the input cable is selected, the current of the maximum input current load is calculated first, then the cross-sectional area of the wire is calculated, and the wire diameter of the cable is selected according to the cross-sectional area. For example: 600KW load, voltage 380V, current 600000 ÷ 1.732 ÷ 380 ÷ 0.8 ≈ 1140A at a power factor of 0.8. And (3) calculating according to the line distance formulas (1) and (2) after the maximum input current is determined. The resistance is first calculated by the formula R ═ U/I (1), U being the voltage and I being the current. And calculating the wire diameter of the cable by the formula S ═ rho (L/R) (2), wherein S is the sectional area of the wire, rho is the resistivity of the wire, L is the length of the wire, and R is the resistance, and the wire diameter of the input cable is obtained.
Preferably, a line protection device is disposed on a connection line between the commercial power input cable and the connecting copper plate terminal, for protecting the line of the input connecting copper bar terminal 510.
Specifically, the line protection device may include an overcurrent protection module for performing overcurrent protection on the line of the input connection copper bar terminal 510 to prevent input overcurrent. Specifically, the overcurrent protection module can comprise an overcurrent protection relay drive locking circuit and an overcurrent protection circuit.
Further, still set up short-circuit protection module on commercial power input cable and the connecting copper tablet terminal looks connecting line, short-circuit protection module with input connection copper bar terminal 510 is connected, is used for right the circuit of input connection copper bar terminal 510 carries out short-circuit protection, prevents the short circuit. The short-circuit protection module comprises a short-circuit protection relay drive locking circuit and a short-circuit protection circuit.
The number of the input connecting copper bar terminals 510 is three, and the fastening torque is respectively 13Nm (M8 bolt), 26Nm (M10 bolt) and 50Nm (M12 bolt). The cabinet body 100 is further provided with a ground bar terminal 520, and the ground bar terminal 520 is arranged adjacent to the input connection copper bar terminal 510 and is used for connecting a protective ground wire. Preferably, the protective earth wire is firmly tied on the metal beam of the turn wire by the turn wire, so that the earth wire can be prevented from being pulled loose by the earth wire fastening screw.
The BMS interface is arranged on the cabinet body 100 and used for connecting a BMS of a battery to be tested and performing handshaking communication by importing DBC files. Through setting up the BMS interface, can detect the battery that has battery management system, improve the applied variety of the detecting system of this application.
The testing device comprises a first channel sub-cabinet and a second channel sub-cabinet, and connecting terminals of the first channel sub-cabinet and the second channel sub-cabinet are respectively connected with the anode and the cathode of the energy storage battery to be tested through battery cables.
The wire diameter of the battery cable should satisfy the discharge current when the battery is close to the discharge end voltage. The specific calculation of the wire diameter is the same as that of the commercial power input cable, and is not described herein again.
The first channel sub-machine cabinet comprises a standing test unit, a constant voltage charging test unit, a constant current charging test unit and a constant power charging test unit.
The standing test unit comprises a standing test circuit for performing standing detection on the battery to be tested, specifically, detecting the battery to be tested under the condition of no charging or no discharging to obtain the terminal voltage corresponding to each time point in the standing test process.
The constant-voltage charging test unit comprises a constant-voltage charging test circuit used for performing a constant-voltage charging test on the energy storage battery to be tested, specifically, the voltage between two electrodes of the battery is maintained at a constant value for charging, and a terminal voltage corresponding to each time point in the constant-voltage charging process is obtained. The constant-voltage charging can simulate the similar constant-voltage charging state of the storage battery during the running of a vehicle, and can automatically adjust the charging current along with the change of the charge state of the storage battery, realize the complete charging of the storage battery as far as possible, and simultaneously reduce gassing and water loss as far as possible.
The constant current charging test unit comprises a constant current charging test circuit for performing a constant current charging test on the energy storage battery to be tested, specifically, adjusting the output voltage of the charging device or changing a resistor connected in series with the battery, and keeping the charging current unchanged, namely, charging is performed by using a constant current value from the beginning to the end of charging, namely, a so-called constant current charging method is used for obtaining a terminal voltage corresponding to each time point in the constant current charging process. In the constant current charging process, if the charging current is increased, the constant current charging test circuit can automatically reduce the output voltage, so that the current is reduced and is kept constant. Along with the increase of the charging quantity of the storage battery, when the voltage at two ends of the storage battery continuously rises, the voltage at the output end of the switching power supply gradually rises along with the charging process, so that the charging current is prevented from becoming small, and the charging current is kept basically unchanged.
The constant-power charging test unit comprises a constant-power charging test circuit and is used for performing constant-power charging test on the energy storage battery to be tested to obtain terminal voltage corresponding to each time point in the constant-power charging process. Specifically, the charging power is not changed, and the current and the voltage are allowed to change within a reasonable range, that is, the higher the charging voltage is, the smaller the charging current is.
The second channel sub-machine cabinet comprises a constant voltage discharge test unit, a constant current discharge test unit, a constant power discharge test unit, a constant resistance discharge test unit and a constant voltage and constant current discharge test unit.
The constant-voltage discharge test unit comprises a constant-voltage discharge test circuit used for performing constant-voltage discharge test on the energy storage battery to be tested to obtain the terminal voltage corresponding to each time point in the constant-voltage discharge process. Specifically, the voltage is kept basically unchanged, and the current is gradually reduced, so that the influence of polarization can be eliminated. When the current drops slowly in the whole change process, the material is enabled to perform a slow lithium embedding process in the range corresponding to the material discharge platform.
The constant current discharge test unit comprises a constant current discharge test circuit used for performing constant current discharge test on the energy storage battery to be tested to obtain the terminal voltage corresponding to each time point in the constant current discharge process. Specifically, the voltage is gradually decreased while keeping the current substantially constant. Constant current discharge can be used for detecting a backup power supply, and the use safety and the maximum service life of the battery can be greatly improved through the constant current discharge.
The constant-power discharge test unit comprises a constant-power discharge test circuit and is used for performing constant-power discharge test on the energy storage battery to be tested to obtain terminal voltage corresponding to each time point in the constant-power discharge process. The method specifically comprises the following steps: the battery is discharged from the beginning, the discharge power is unchanged, and the voltage value in the process of the terminal voltage of the battery is reduced to the critical voltage.
The constant-resistance discharge test unit comprises a constant-resistance discharge test circuit and is used for performing constant-resistance discharge test on the energy storage battery to be tested to obtain terminal voltage corresponding to each time point in the constant-resistance discharge process. The method specifically comprises the following steps: and keeping the load resistance at a certain value in the discharging process, and recording the discharging voltage of the battery according to the time sequence.
The constant-voltage constant-current discharge testing unit comprises a constant-voltage constant-current discharge testing circuit and is used for performing constant-voltage constant-current discharge testing on the energy storage battery to be tested to obtain the terminal voltage corresponding to each time point in the constant-voltage constant-current discharge process. The method specifically comprises the following steps: the constant voltage and the constant current are two different states respectively presented by the power supply in the process of load change. For example, a 36V 0.3A constant-current constant-voltage power supply commonly used for street lamps, when the equivalent internal resistance of a load is lower than 1200, the voltage of the power supply is automatically adjusted to be low so as to ensure that the current does not exceed 0.3A, and the power supply is in a constant-current state at the moment. When the load is larger than 1200, the power supply will continuously raise the output voltage to 36v in order to keep the current from decreasing. After that, even if the internal resistance of the load rises again, the voltage does not rise any more, but the current continuously reduces along with the change of the load, and the power supply at the moment belongs to a constant voltage state. Therefore, the constant-current constant-voltage power supply is equivalent to setting a stable upper voltage limit for a common constant-current power supply. The state is actually that the constant current is not constant at constant voltage and the constant voltage is not constant at constant current.
The voltage values in the detection process under different modes such as standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power charging, constant power discharging, constant resistance discharging, constant voltage and constant current discharging are obtained through detection of different test modules in the test device, the voltage values are sent to a communication management machine and sent to an upper computer through the communication management machine, the corresponding relation between the voltage values under different detection modes and time is stored in a curve form in the upper computer, and a standing voltage change curve, a constant voltage charging voltage change curve, a constant voltage discharging voltage change curve, a constant current charging voltage change curve, a constant resistance discharging voltage change curve and a constant voltage and constant current discharging voltage change curve are obtained respectively. Meanwhile, the corresponding relation between the obtained voltage value and the time can be stored in a table form and displayed.
The power supply of the detection equipment comprises an input power supply and an auxiliary power supply, wherein the input power supply is used for connecting a power loop of the detection equipment with input mains supply, and the auxiliary power supply is used for connecting a control loop of the detection equipment with the input mains supply. The auxiliary power supply comprises a first channel sub-machine cabinet auxiliary power supply and a second channel sub-machine cabinet auxiliary power supply which are respectively used for controlling the connection/disconnection of the power supplies of the first channel sub-machine cabinet and the second channel sub-machine cabinet. Correspondingly, as shown in fig. 8, the cabinet 100 of the detection device is provided with an auxiliary power switch 810 and an input switch 820, so that the convenience of the device is improved.
Referring to fig. 7, status indicators, including a rectifier status indicator 910, a first channel status indicator 920, a second channel status indicator 930, and a warning light 940, are further disposed at the front panel of the cabinet 100.
The front panel of the cabinet 100 is further provided with an emergency stop button 950 to prevent an accidental operation. In particular use, the emergency stop button 950 may be continuously pressed to turn off the rectifier, etc. and disconnect the device from the battery.
The operation of the distributed energy storage battery detection equipment provided by the invention is divided into four parts, namely mechanical installation, electrical installation, equipment operation and upper computer software operation.
1. Mechanical mounting
The detection apparatus, when moving, needs to have a greater load capacity than the apparatus, for example, to be carried by a forklift. When the device is installed, the space at the side and the rear of the detection device has no special requirements, and enough operation space needs to be reserved in front of the device.
2. Electrical installation
(1) Power cable inlet wire
And (4) selecting an upper outgoing line selection piece by adopting a top incoming line mode. The wire diameter of the input cable of the device meets the requirements for maximum input current, including maximum battery charging current. Each cabinet is connected with the battery through two cables of the anode and the cathode, and the wire diameter of the battery cable meets the requirement of battery discharge current when the battery is close to the discharge termination voltage. The rectifier input and the battery power cable (the end heads of which are pressed with copper noses) are connected with the copper bar under the power switch. And a grounding bar is arranged near the input connecting copper bar, a protective ground wire is connected to the grounding bar and is connected with each cabinet of the system, and all the cabinets and the cable troughs are grounded according to local regulations. The ground wire is firmly tied on the metal beam of the turn wire by using the turn wire, so that the ground wire fastening screw is prevented from being torn loose when the ground wire is pulled. A circuit breaker is provided for the input power supply outside the device. A protection device is additionally arranged on a commercial power input distribution line to prevent input overcurrent and provide short-circuit protection.
The power line connection steps are as follows: 1) and confirming that all input and output power distribution switches of the equipment are completely disconnected and all power switches inside the equipment are completely disconnected. 2) Open the equipment front door, take off lower part protection apron, visible connection copper bar. 3) Connecting the protective earth and other necessary earth cables to the earth copper bars at the lower end of the power supply equipment of the apparatus. 4) Mains input connection: and connecting an alternating current input cable to a main equipment input copper bar L1-L2-L3 terminal (40kW equipment), wherein the fastening torque is 13Nm (M8 bolt), 26Nm (M10 bolt) and 50Nm (M12 bolt). Ensuring the correct phase sequence. And after confirming that all the cables are connected, reinstalling the metal protective cover plate. 5) Battery connection: a channel 1 cabinet (first channel sub-cabinet) battery cable is connected between the equipment (CH1+/CH 1-) terminals and the battery. The channel 2 cabinet (second channel sub-cabinet) battery cable is connected between the equipment (CH2+/CH 2-) terminals and the battery. The correctness of the connection polarity of the battery is ensured. The schematic diagram of the mains input connection terminal and the schematic diagram of the battery power cable connection terminal are shown in fig. 1 and 2.
(2) Control cable routing
To accurately detect the battery port voltage, the port voltage needs to be directly connected to the total voltage interface. The BMS interface may be connected to the battery BMS for handshaking communication by importing the DBC file. The network port only needs to be connected with the network port 1 actually, and the TCP/IP1 is connected to the upper computer.
3. The detection device operates:
the detection equipment LED status indicator lamp is positioned above the front door of the cabinet 100. Wherein, POWER: a rectifier status indicator light 910; RUN 1: a first channel status indicator light 920; RUN 2: a second channel status indicator lamp 930; ALARM: a warning lamp 940; EPO: an emergency stop button 950.
An emergency shutdown (EPO) button is provided on the appliance front door panel. The EPO button is covered with a safety cover. When the EPO button is pressed for 2 seconds, all rectifiers, DCDC switches are turned off and the device is disconnected from the battery. Under normal conditions, EPO is unable to disconnect the input power to the device because the device employs a manual on-input breaker.
A power switch arranged in the equipment cabinet can be seen after a front door is opened by a key. The method comprises the following steps: q1: input switch 820: and connecting the equipment power loop with the input commercial power. Q2: auxiliary power switch 810: and connecting the power supply of the auxiliary power supply of the equipment control loop with the input commercial power.
Starting up under the condition that the equipment is completely powered down: 1) close the main input switch Q1. When the rectifier is started, the rectifier indicator lamp flashes in green. After about 40 seconds, the rectifier starts to operate normally, and the rectifier indicator lamp turns green and is normally on. 2) The device is in standby state at this time. 3) And starting the DCDC through the upper computer software, wherein the equipment is in a working state at the moment.
And all power switches and circuit breakers are switched off completely. 1) Press emergency shutdown (EPO) button on front door. 2) Front door Q1 is opened. 3) Disconnect the external battery current line. 4) Disconnecting the external battery voltage line. 5) Disconnect the external mains distribution switch.
An emergency shutdown (EPO) button on the front door of the device is closed in an emergency (e.g., fire, flood, etc.) by pressing the emergency shutdown button 950. When the EPO button is pressed for 2 seconds, the emergency stop can be executed, the system can close the ACDC converter and the DCDC converter, the connection with the battery is quickly cut off, and the battery stops charging or discharging.
4. The software operation of the upper computer:
the equipment needs to be in a standby state, and the software of the upper computer is allowed to be started. Setting an IP address of an upper computer, clicking a 'running system', entering a login interface, and inputting a login name and a password for login. After entering the main interface, clicking 'battery detection', selecting user authority, inputting a user name and a password, and entering the distributed energy storage monitoring system.
Clicking the "process file configuration and download" page creates a process file, as shown in FIG. 9.
(1) The process steps are increased: firstly, a process mode is selected, and the process mode comprises 9 types: standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power charging, constant power discharging, constant resistance discharging, and constant voltage and constant current charging. Then setting parameter values and running time, and clicking to increase the process steps.
(2) And (3) modifying: and selecting the step needing to be modified, and clicking the step after modifying the parameters.
(3) And a deletion process step: and selecting the step to be deleted, and clicking the deletion step.
(4) Clearing an editing area: all added process steps are deleted.
(5) Creating a process file: and after all the steps are edited, clicking 'create process file', generating a file, and automatically adding the file name into a drop-down box of the file.
(6) Selecting a process file: and selecting the file in the drop-down box, clicking 'select process file', displaying the selected process file in the process step editing area, and editing the selected process file.
(7) And (4) deleting the process file: selecting a process file in the file drop-down box, and clicking 'delete process file' to delete the file.
The distributed energy storage battery detection system provided by the invention can be used for detecting batteries of battery packs without BMS (battery management system) and battery packs with BMS, the equipment has nine working modes, and the operation in different working modes can be realized through process setting, so that the performance parameters of the energy storage lithium battery can be comprehensively and efficiently detected. Meanwhile, real-time data and historical data can be displayed through curves/tables, and query and use are facilitated. Meanwhile, the detection equipment comprises the cabinet body 100, and an AC sub cabinet 210 and a DC sub cabinet 220 which are arranged in the cabinet body 100 and connected side by side, and is small in size and convenient to carry. The utility model has the advantages of set up commercial power input connection terminal and be used for connecting the terminal of the first passageway sub-cabinet body 100 of the battery that awaits measuring and the terminal of the sub-cabinet body 100 of second passageway, the installation with connect the battery all simple and convenient. In addition, an input overcurrent protection device, a short-circuit protection device, a status indicator lamp, an emergency stop button 950 and the like are also arranged, so that the device has the advantages of simplicity and convenience in operation, safety and reliability.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the invention. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A distributed energy storage battery detection system, comprising: the upper computer and the detection equipment are connected through a data communication line; the detection equipment is connected with the energy storage battery to be detected; the upper computer is used for controlling the detection equipment to detect the energy storage battery to be detected and storing detection data;
the detection equipment comprises a cabinet body, a control power supply, an AC sub-cabinet and a DC sub-cabinet which are arranged in the cabinet body and are connected in parallel; the control power supply is used for controlling the power connection of the AC sub-cabinet and the DC sub-cabinet, and the AC sub-cabinet is used for converting alternating-current voltage into first direct-current voltage; the DC sub-machine cabinet is used for converting a first direct-current voltage into a second direct-current voltage; the DC sub-machine cabinet comprises a communication management machine and a testing device, the testing device is used for detecting standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging and constant voltage and constant current discharging of an energy storage battery to be tested, the communication management machine is used for receiving and storing testing data of the testing device, sending the testing data to an upper computer, receiving a command of the upper computer and sending the command to the testing device.
2. The distributed energy storage battery detection system according to claim 1, wherein the testing device comprises a first channel sub-cabinet and a second channel sub-cabinet, and connection terminals of the first channel sub-cabinet and the second channel sub-cabinet are respectively connected with positive and negative electrodes of the energy storage battery to be tested through battery cables.
3. The distributed energy storage battery detection system according to claim 2, wherein the first channel sub-machine cabinet comprises a standing test unit, a constant voltage charging test unit, a constant current charging test unit and a constant power charging test unit, wherein the constant voltage charging test unit is used for performing constant voltage charging test on the energy storage battery to be tested, the constant current charging test unit is used for performing constant current charging test on the energy storage battery to be tested, and the constant power charging test unit is used for performing constant power charging test on the energy storage battery to be tested.
4. The distributed energy storage battery detection system according to claim 2, wherein the second channel sub-cabinet comprises a constant voltage discharge test unit, a constant current discharge test unit, a constant power discharge test unit, a constant resistance discharge test unit and a constant voltage and constant current discharge test unit, the constant voltage charge test unit is used for performing constant voltage charge test on the energy storage battery to be tested, the constant current charge test unit is used for performing constant current charge test on the energy storage battery to be tested, and the constant power charge test unit is used for performing constant power charge test on the energy storage battery to be tested.
5. The distributed energy storage battery detection system according to claim 2, wherein the DC sub-rack is provided with an auxiliary power supply, and the auxiliary power supply comprises a first channel sub-rack auxiliary power supply and a second channel sub-rack auxiliary power supply, which are respectively used for controlling connection/disconnection of power supplies of the first channel sub-rack and the second channel sub-rack.
6. The distributed energy storage battery detection system according to claim 1, wherein the upper computer comprises a monitoring module, a process file configuration module, a command sending module, a data receiving module, a data storage module, a historical data analysis module, a log and alarm information module and a system configuration module;
the monitoring module is used for monitoring the communication state of a test channel of the test device and analyzing whether the test channel is in normal communication or not; the process file configuration module is used for setting detection modes of standing, constant voltage charging, constant voltage discharging, constant current charging, constant current discharging, constant power discharging, constant resistance discharging or constant voltage and constant current discharging; the command sending module is used for sending a detection command of the currently set detection mode to the testing device for detection; the data receiving module is used for receiving the test data sent by the communication manager; the data storage module is used for storing the received test data; the historical data analysis module is used for inquiring historical data, analyzing and processing the historical data and displaying the test data in a numerical value, curve and other modes; the log and alarm information module is used for inquiring the operation record and the alarm amount; and the system configuration module is used for determining the process files and managing the user information.
7. The distributed energy storage battery detection system according to claim 1, wherein the cabinet body is provided with an input connection copper bar terminal and a line protection device, the input connection copper bar terminal is used for connecting a mains supply input cable, and the line protection device is connected with the input connection copper bar terminal and used for protecting a line of the input connection copper bar terminal.
8. The distributed energy storage battery detection system of claim 7, wherein the line protection device comprises an overcurrent protection module, the overcurrent protection module is connected with the input connection copper bar terminal and is used for performing overcurrent protection on the line of the input connection copper bar terminal, and the overcurrent protection module comprises an overcurrent protection relay drive locking circuit and an overcurrent protection circuit.
9. The distributed energy storage battery detection system of claim 7, wherein the line protection device comprises a short circuit protection device, the short circuit protection device is connected with the input connection copper bar terminal and is used for performing short circuit protection on the line of the input connection copper bar terminal, and the short circuit protection device comprises a short circuit protection relay drive locking circuit and a short circuit protection circuit.
10. The distributed energy storage battery detection system as claimed in any one of claims 1 to 9, wherein the cabinet is provided with a BMS interface for connecting a BMS of a battery to be tested.
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