CN115219921A - Monitoring method and device in cell testing process and cell testing monitoring system - Google Patents
Monitoring method and device in cell testing process and cell testing monitoring system Download PDFInfo
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- CN115219921A CN115219921A CN202211000814.6A CN202211000814A CN115219921A CN 115219921 A CN115219921 A CN 115219921A CN 202211000814 A CN202211000814 A CN 202211000814A CN 115219921 A CN115219921 A CN 115219921A
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the application provides a monitoring method and device in a cell testing process and a cell testing monitoring system. When the battery core is tested, the output voltage of the acquisition line can be acquired periodically. Then, whether the deviation value of the collected line voltage meets a first condition or not and whether the minimum value of the collected line voltage meets a second condition or not can be judged. The first condition is used for indicating single-line disconnection of the acquisition line, and the second condition is used for indicating double-line disconnection of the acquisition line. If the voltage of the acquisition line indicates that the acquisition line has no single-line broken fault or double-line broken fault, the testing device can monitor the tested core according to the preset voltage upper limit value and voltage lower limit value. Under the condition, whether the tested electric core has faults or not is judged based on the preset upper voltage limit value and the preset lower voltage limit value, and the influence of the connection faults between the connecting lines and the storage battery on the detection result can be filtered.
Description
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a monitoring method and apparatus for a battery cell test process, and a battery cell test monitoring system.
Background
With the increasing environmental pollution and the shortage of fossil energy, the clean energy technology is receiving more and more attention. In some scenarios, clean energy may be converted to electrical energy using power generation techniques, thereby utilizing the electrical energy as a source of power. Storage batteries are also widely used as a way of storing electrical energy. For example, in the field of new energy vehicles, batteries are often used as an important component of power systems. It is thus clear that battery technology is of great importance for clean energy technology.
The stability of a battery as a means of storing electrical energy by chemical energy is often related to the safety of the entire device. For this reason, before the battery is shipped from a factory, it is necessary to test the safety of the battery. Only batteries that pass the safety test can be marketed. Specifically, in order to prevent accidents in the testing process, when the storage battery is tested, the anode and the cathode of the storage battery can be connected through the connecting wire, so that whether the storage battery is likely to break down or not is judged by monitoring the output voltage of the storage battery, and the testing is stopped in time when the storage battery is likely to break down.
However, the conventional method of protecting the secondary battery during the inspection cannot distinguish between the abnormality of the secondary battery and the abnormality of the connection between the connection line and the secondary battery. That is, if the output of the storage battery is normal but the connection between the connection line and the storage battery is abnormal, the conventional detection method may misunderstand that the output of the storage battery is abnormal.
Disclosure of Invention
In view of this, embodiments of the present application provide a monitoring method and apparatus in a cell testing process, and a cell testing monitoring system, which aim to effectively distinguish between an abnormality of a storage battery and an abnormality of connection between a connection line and the storage battery.
In a first aspect, an embodiment of the present application provides a monitoring method in a battery core testing process, where the method is used to monitor a state of a tested battery core in a testing process of the tested battery core, and the tested battery core is connected to a testing device through two collecting wires, and the method includes:
acquiring a collecting line voltage periodically, wherein the collecting line voltage is the voltage difference of two collecting lines connected with the tested battery cell, and the deviation value of the collecting line voltage is determined according to the difference between the maximum voltage and the minimum voltage of the collecting line voltage;
judging whether the deviation value of the acquired line voltage meets a first condition, wherein the first condition is used for indicating that a single line of the acquired line is broken, and the deviation value is determined according to the difference between the maximum value and the minimum value of the acquired line voltage;
judging whether the minimum value of the acquisition line voltage meets a second condition, wherein the second condition is used for indicating the double-line disconnection of the acquisition line;
and if the deviation value of the acquisition line voltage does not meet the first condition and the deviation value of the acquisition line voltage does not meet the second condition, monitoring the tested electric core based on a preset voltage upper limit value and a preset voltage lower limit value.
In some possible implementation manners, the determining whether the deviation value of the collected line voltage satisfies the first condition includes:
obtaining deviation values of the acquired line voltage in a plurality of monitoring periods, wherein the plurality of monitoring periods comprise a first monitoring period, the deviation value of the acquired line voltage in the first monitoring period is the difference between the maximum voltage and the minimum voltage in the first monitoring period, the maximum voltage is the maximum value of the acquired line voltage in the first monitoring period, and the minimum voltage is the minimum value of the acquired line voltage in the first monitoring period;
determining a first number, wherein the first number is the number of acquisition cycles with deviation values not less than a preset deviation value;
and judging whether the first quantity is larger than a first preset quantity, and if so, determining that the deviation value of the collected line voltage meets a first condition.
In some possible implementations, the determining whether the minimum value of the collected line voltage satisfies a second condition includes:
acquiring the minimum value of the collected line voltage in a plurality of monitoring periods;
determining a second number, wherein the second number is the number of acquisition cycles with the minimum value larger than a preset minimum value;
and judging whether the second quantity is greater than a second preset quantity, and if so, determining that the minimum value of the collected line voltage meets a second condition.
In some possible implementations, the method further includes:
and if the deviation value of the collected line voltage meets the first condition, or the minimum value of the collected line voltage meets the second condition, sending a fault prompt.
In some possible implementations, the monitoring the measured electric core based on the preset upper voltage limit and the preset lower voltage limit includes:
judging whether the collected line voltage is greater than the voltage upper limit value or not;
judging whether the collected line voltage is smaller than the voltage lower limit value or not;
and in response to the fact that the voltage of the acquisition line is larger than the upper limit value of the voltage, or the voltage of the acquisition line is smaller than the lower limit value of the voltage, stopping a detection process of the tested electric core and sending a fault prompt.
In a second aspect, an embodiment of the present application provides a monitoring device in a battery core test process, the device is used for monitoring a state of a tested battery core in a test process of the tested battery core, the tested battery core is connected to the testing device through two collecting wires, the device includes:
the acquisition unit is used for periodically acquiring a collecting line voltage, wherein the collecting line voltage is the voltage difference of two collecting lines connected with the tested battery cell, and the deviation value of the collecting line voltage is determined according to the difference between the maximum voltage and the minimum voltage of the collecting line voltage; the processing unit is used for judging whether the deviation value of the acquired line voltage meets a first condition, the first condition is used for indicating that the single line of the acquired line is broken, and the deviation value is determined according to the difference between the maximum value and the minimum value of the acquired line voltage; judging whether the minimum value of the acquisition line voltage meets a second condition, wherein the second condition is used for indicating the double-line disconnection of the acquisition line; and if the deviation value of the collected line voltage does not meet the first condition and the deviation value of the collected line voltage does not meet the second condition, monitoring the tested electric core based on a preset voltage upper limit value and a preset voltage lower limit value.
In some possible implementation manners, the obtaining unit is specifically configured to obtain a deviation value of the collected line voltage in a plurality of monitoring periods, where the plurality of monitoring periods includes a first monitoring period, the deviation value of the collected line voltage in the first monitoring period is a difference between a maximum voltage and a minimum voltage in the first monitoring period, the maximum voltage is a maximum value of the collected line voltage in the first monitoring period, and the minimum voltage is a minimum value of the collected line voltage in the first monitoring period; the processing unit is specifically configured to determine a first number, where the first number is the number of acquisition cycles for which the deviation value is not less than a preset deviation value; and judging whether the first quantity is larger than a first preset quantity, and if so, determining that the deviation value of the collected line voltage meets a first condition.
In some possible implementations, the obtaining unit is specifically configured to obtain a minimum value of the collected line voltage in a plurality of monitoring periods; the processing unit is specifically configured to determine a second number, where the second number is the number of acquisition cycles for which a minimum value is greater than a preset minimum value; and judging whether the second quantity is greater than a second preset quantity, and if so, determining that the minimum value of the collected line voltage meets a second condition.
In some possible implementation manners, the device further includes a sending unit, and the sending unit is configured to send a fault prompt if the deviation value of the collected line voltage satisfies the first condition, or the minimum value of the collected line voltage satisfies the second condition.
In some possible implementation manners, the processing unit is further specifically configured to determine whether the collected line voltage is greater than the voltage upper limit; judging whether the voltage of the acquisition line is smaller than the lower limit value of the voltage; and the sending unit is also used for responding to the condition that the voltage of the acquisition line is greater than the voltage upper limit value or the voltage of the acquisition line is less than the voltage lower limit value, stopping the detection process of the tested electric core and sending a fault prompt.
In a third aspect, an embodiment of the present application provides a battery cell test monitoring system, where the system includes at least one voltage acquisition board, at least one thermocouple acquisition board, a negative temperature coefficient thermistor acquisition board, a relay output board, a motherboard, and at least one MCU board; the at least one voltage acquisition board, the at least one thermocouple acquisition board, the negative temperature coefficient thermistor acquisition board and the relay output board are connected with the at least one MCU board through the motherboard; the at least one voltage acquisition board, the at least one thermocouple acquisition board, the negative temperature coefficient thermistor acquisition board and the relay output board do not comprise an MCU.
In a fourth aspect, an embodiment of the present application provides an apparatus, where the apparatus includes a memory and a processor, where the memory is configured to store instructions or codes, and the processor is configured to execute the instructions or the codes, so that the apparatus executes the monitoring method in the cell testing process according to any one of the foregoing first aspects.
In a fifth aspect, an embodiment of the present application provides a computer storage medium, where codes are stored in the computer storage medium, and when the codes are executed, an apparatus that runs the codes implements the monitoring method in the cell testing process according to any one of the foregoing first aspects.
The embodiment of the application provides a monitoring method and device in a cell testing process and a cell testing monitoring system. When the tested electric core is tested, the tested electric core can be connected to the testing device through the two collecting wires. When the battery core is tested, the output voltage of the acquisition line can be acquired periodically. Then, whether the deviation value of the collected line voltage meets a first condition or not and whether the minimum value of the collected line voltage meets a second condition or not can be judged. The first condition is used for indicating single-line disconnection of the acquisition line, and the second condition is used for indicating double-line disconnection of the acquisition line. If the voltage of the acquisition line indicates that the acquisition line has no single-line broken fault or double-line broken fault, the testing device can monitor the tested core according to the preset voltage upper limit value and voltage lower limit value. Therefore, whether the single-line broken fault exists in the acquisition line is judged based on the deviation value of the acquisition line voltage, and whether the double-line broken fault exists in the acquisition line is judged based on the minimum value of the acquisition line voltage. And if the single-wire disconnection fault and the double-wire disconnection fault do not exist between the measured electric core and the acquisition line, the normal connection between the measured electric core and the acquisition line is indicated. Under the condition, whether the tested electric core has faults or not is judged based on the preset upper voltage limit value and the preset lower voltage limit value, and the influence of the connection faults between the connecting lines and the storage battery on the detection result can be filtered.
Drawings
To illustrate the technical solutions in the present embodiment or the prior art more clearly, the drawings needed to be used in the description of the embodiment or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a cell test monitoring system according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a method of a monitoring method in a cell testing process according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a monitoring device in a cell testing process according to an embodiment of the present application.
Detailed Description
The performance test of the storage battery is required in the production process of the storage battery. Specifically, each cell in the storage battery may be tested with the cell as a granularity. In the test process, the voltage value and the temperature value of the battery cell can be monitored in real time. Specifically, the temperature sensor and the measured electric core may be adhered together, and the positive electrode and the negative electrode of the measured electric core are connected to the detection device by two connection wires. Therefore, the temperature of the tested electric core is obtained through the temperature sensor, and the voltage of the tested electric core is obtained through the connecting wire. If the tested electric core has faults, the detection device can find the faults in time. In order to prevent the electric core from being damaged in the test process, the test on the tested electric core can be stopped after the voltage data is detected to be abnormal and/or the temperature data is detected to be abnormal.
However, if the tested electric core is not abnormal, but the connecting line between the tested electric core and the testing device is broken, the voltage detected by the testing device through the connecting line is also abnormal. Therefore, even if the voltage actually output by the tested electric core is normal, the testing device still detects abnormal voltage, so that the tested electric core is determined to be in fault, and the test is terminated. For this case, a technician is required to manually resume testing.
In addition, considering that the number of battery cells in a storage battery is often large, when a storage battery is tested, in order to improve the testing efficiency, a plurality of battery cells are often tested at the same time. Correspondingly, a plurality of groups of connecting wires are connected to the testing device. When making connections, there may be situations where one or more groups of connecting wires are floating. Thus, to avoid test stops, technicians are required to manually shield the test equipment from the effects of the suspended connecting wires.
Obviously, the method cannot accurately distinguish the abnormity of the storage battery and the abnormity of the connection between the connecting line and the storage battery, and the test efficiency of the battery core is influenced.
In addition, in the conventional testing apparatus, one or more Micro Control Units (MCUs) are required to be configured on each functional board card, and data exchange is performed between the functional board cards through a communication protocol. Therefore, on one hand, the MCU is configured, so that the manufacturing cost of the functional board card is increased; on the other hand, a phenomenon of data packet loss may exist between boards.
In order to solve the technical problem, embodiments of the present application provide a monitoring method and apparatus in a cell testing process, and a cell testing monitoring system.
First, a battery cell test monitoring system provided in an embodiment of the present application is introduced.
Fig. 1 is a schematic diagram of a structure of a cell test monitoring system according to an embodiment of the present disclosure. In the embodiment shown in fig. 1, the cell testing and monitoring system includes a voltage collecting board 1 to a voltage collecting board 4, a thermocouple collecting board 1 to a thermocouple collecting board 4, a negative temperature coefficient thermistor collecting board, a relay output board, a motherboard, an MCU board 1, and an MCU board 2. The voltage acquisition board, the thermocouple acquisition board, the negative temperature coefficient thermistor acquisition board and the relay output board do not comprise an MCU (micro control unit), the mother board is a bus board for all signals, and other circuit boards except the MCU board 1 and the MCU board 2 are connected with the mother board through quick plug terminals. The MCU board 1 and the MCU2 comprise at least one MCU.
In the embodiment of the application, the voltage acquisition board 1 to the voltage acquisition board 4, the thermocouple acquisition board 1 to the thermocouple acquisition board 4, the negative temperature coefficient thermistor acquisition board and the relay output board are connected with the MCU board 1 and the MCU board 2 through the mother board.
Optionally, the voltage collecting board 1, the voltage collecting board 2, the thermocouple collecting board 1, the thermocouple collecting board 2 and the negative temperature coefficient thermistor collecting board are connected with the MCU board 1 through a motherboard and controlled by the MCU board 1. The voltage acquisition board 3, the voltage acquisition board 4, the thermocouple acquisition board 3 and the thermocouple acquisition board 4 are connected with the MCU board 2 through a mother board and controlled by the MCU board 2. The output board of the relay without the MCU is jointly controlled by the MCU boards 1 and 2. The data collected by each collecting plate are directly uploaded to the corresponding MCU, the voltage collecting and NTC collecting and uploading analog quantity signals, the thermocouple collecting and uploading communication signals, and the relay receiving switching value signals.
As a possible implementation, in the embodiment shown in fig. 1, the voltage collecting board 1 may be connected to the motherboard by a quick-plug terminal connection. The micro-control unit board 1 can be connected with the master through a quick-plug terminal connection.
Therefore, the board cards for detection are controlled by the unified MCU, the influences of poor reliability, low uploading speed, easy packet loss of communication data and the like caused by mutual communication among the board cards are eliminated, and the system is simple and high in reliability. The mode also reduces the number of the MCUs, greatly reduces the number of the connecting wires between the board cards and effectively reduces the cost.
In the embodiment shown in fig. 1, the number of the voltage acquisition boards is 4, the number of the thermocouple acquisition boards is 4, and the number of the MCU boards is 2. It is understood that in other embodiments of the present application, the number of the voltage collection tables may be different from 4, for example, 1 or 5; the number of the thermocouple collecting plates is not 4, for example, 1 or 5; the number of MCU boards may also be other than 2, for example 1 or 3.
During practical application, the battery cell test monitoring system provided by the embodiment of the application comprises at least one voltage acquisition board, at least one thermocouple acquisition board, a negative temperature coefficient thermistor acquisition board, a relay output board, a mother board and at least one MCU board.
The monitoring method in the battery cell testing process provided by the embodiment of the present application is described below. The monitoring method in the cell testing process can be executed by a controller. The controller may be, for example, the MCU board 1 and/or the MCU board 2 in the embodiment shown in fig. 1, or may be an MCU in a conventional testing apparatus. Next from the controller. The monitoring method in the battery cell testing process provided by the embodiment of the application is explained. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 2, fig. 2 is a flowchart of a method of a monitoring method in a cell testing process according to an embodiment of the present application, where the method includes:
s201: the acquisition line voltage is periodically acquired.
In order to judge whether the connection between the tested battery cell and the testing device is abnormal, a controller in the testing device can periodically acquire the voltage of the acquisition line. The voltage of the acquisition line is the voltage difference of two acquisition lines connected with the anode and the cathode of the tested electric core.
Specifically, an acquisition period can be set in the controller, and the voltage of the acquired line of the tested electric core is recorded periodically. Optionally, in order to avoid that the measured electric core is damaged due to the fact that the measured electric core is damaged for too long time, a higher acquisition frequency may be set. I.e. the duration of the acquisition period is short.
S202: and judging whether the deviation value of the collected line voltage meets a first condition or not.
After the collected line voltage is collected, the controller may determine a deviation value of the collected line voltage and determine whether the deviation value of the collected line voltage satisfies a first condition. And if the deviation value of the voltage of the acquisition line meets the first condition, indicating that one of the two acquisition lines connected with the tested electric core is broken. In this way, the controller can notify the technician to reconnect the tested electrical core to the testing device. In the process, the controller can not interrupt the test of other tested electric cores and can also interrupt the test of other tested electric cores.
In practical application, if one of the two collecting lines of the tested battery core is disconnected, the voltage waveform collected by the testing device is close to half-wave alternating current. That is, if the tested electric core has the fault of single line break of the collecting line, the waveform of the voltage of the collecting line detected by the controller is similar to half-wave alternating current. Therefore, when the tested electric core is judged whether the single line breakage fault of the collecting line occurs or not, the controller can calculate the deviation value of the collecting line voltage and judge whether the waveform of the collecting line voltage is close to half-wave alternating current or not based on the deviation value of the collecting line voltage. If yes, determining that the single-wire disconnection fault of the acquisition wire occurs to the tested electric core.
In some possible implementations, the controller may further determine whether the deviation value of the collected line voltage satisfies the first condition based on the deviation values of the plurality of monitoring periods.
Specifically, the controller may calculate a deviation value of the collected line voltage over a plurality of monitoring periods. Each monitoring period comprises at least two periods for acquiring the collected line voltage. The deviation value in the monitoring period is the difference between the maximum voltage and the minimum voltage in the monitoring period. The maximum voltage is the maximum value of the voltage of the collecting line in the monitoring period, and the minimum voltage is the minimum value of the voltage of the collecting line in the monitoring period.
Then, the controller may compare whether the deviation value of the collected line voltage is greater than the preset deviation value for each monitoring period, and count the number of monitoring periods in which the deviation value of the collected line voltage is greater than the preset deviation value, which may be referred to as a first number. The controller may then determine whether the first number is greater than a first preset number. If the first quantity is larger than the first preset quantity, the deviation values of the voltage of the collecting line of the tested electric core in a plurality of monitoring periods are higher, and the waveform of the voltage of the collecting line of the tested electric core is close to the alternating current. For this reason, the controller can determine that the deviation value of the voltage of the acquisition line meets a first condition, and the detected electric core has single line breakage of the acquisition line.
S203: and judging whether the minimum value of the collected line voltage meets a second condition or not.
In addition to determining whether the deviation value of the collected line voltage satisfies the first condition, the controller may also determine whether the minimum value of the collected line voltage satisfies a second condition. And if the minimum value of the voltage of the acquisition line meets a second condition, the two acquisition lines connected with the tested electric core are all subjected to line breakage faults. In this way, the controller can notify the technician to reconnect the tested electrical core to the testing device. In the process, the controller can not interrupt the test of other tested electric cores.
In practical application, if two collecting lines of the tested battery core are disconnected, the voltage waveform collected by the testing device is close to low-voltage direct current. That is, if the tested electric core has the fault of double-line disconnection of the collecting line, the waveform of the voltage of the collecting line detected by the controller is similar to low-voltage direct current. Therefore, when the tested core is judged whether the double-line disconnection fault of the acquisition line occurs, the controller can calculate the minimum value of the acquisition line voltage and judge whether the waveform of the acquisition line voltage is low-voltage direct current or not based on the minimum value of the acquisition line voltage. If yes, determining that the tested electric core has double-line disconnection fault of the acquisition line.
In some possible implementations, the controller may further determine whether the minimum value of the collected line voltage satisfies the second condition based on the minimum values of the plurality of monitoring periods.
Specifically, the controller may first determine a minimum value of the collected line voltage over a plurality of monitoring periods. That is, for a monitoring period including a plurality of acquisition periods, the controller may determine the minimum value of the plurality of acquired line voltages acquired by the plurality of acquisition periods as the minimum value of the acquired line voltage of the monitoring period.
Next, the controller may compare whether the minimum value of the collected line voltage is greater than a preset minimum value in each monitoring period, and count the number of monitoring periods in which the minimum value of the collected line voltage is greater than the preset minimum value, which may be referred to as a second number. The controller may then determine whether the second number is greater than a second predetermined number. If the second quantity is larger than the second preset quantity, the minimum value of the voltage of the collecting line of the tested electric core in a plurality of monitoring periods is smaller, and the waveform of the voltage of the collecting line of the tested electric core is close to direct current. For this purpose, the controller may determine that the minimum value of the voltage of the collecting line satisfies a second condition, and the tested electric core has double-line broken lines of the collecting line.
It should be noted that step S204 may be executed after step S203, may be executed before step S203, or may be executed in synchronization with step S203. The order of the steps is not limited in the embodiments of the present application.
And if the deviation value of the collected line voltage meets the first condition and/or the minimum value of the collected line voltage meets the second condition, indicating that the connection between the tested electric core and the testing device has a fault. Therefore, in order to ensure that the test of the tested electric core is normally carried out, a fault prompt can be sent, so that a technician can adjust the connection between the tested electric core and the test device.
S204: and if the deviation value of the collected line voltage does not meet the first condition and the deviation value of the collected line voltage does not meet the second condition, monitoring the tested electric core based on the preset voltage upper limit value and the preset voltage lower limit value.
If the deviation value of the acquired line voltage does not meet the first condition and the minimum value of the acquired line voltage does not meet the second condition, it is indicated that the acquired line between the tested electric core and the testing device is not broken by a single line or double lines, and the tested electric core can be tested continuously. Specifically, the controller may monitor the core to be tested based on preset upper and lower voltage limits. If the voltage of the collected line is larger than the upper limit value of the voltage and/or the voltage of the collected line is smaller than the lower limit value of the voltage, the abnormal condition of the tested core is shown in the test process. The controller may stop the detection process of the detected electrical core and send a fault alert.
The embodiment of the application provides a monitoring method in a battery cell testing process. When the tested electric core is tested, the tested electric core can be connected to the testing device through the two collecting wires. When the battery core is tested, the output voltage of the acquisition line can be acquired periodically. Then, whether the deviation value of the collected line voltage meets a first condition or not and whether the minimum value of the collected line voltage meets a second condition or not can be judged. The first condition is used for indicating single-line disconnection of the acquisition line, and the second condition is used for indicating double-line disconnection of the acquisition line. If the voltage of the acquisition line indicates that the acquisition line has no fault of single line disconnection or double line disconnection, the test device can monitor the tested core according to the preset voltage upper limit value and the preset voltage lower limit value. Therefore, whether the single-line broken fault exists in the acquisition line is judged based on the deviation value of the acquisition line voltage, and whether the double-line broken fault exists in the acquisition line is judged based on the minimum value of the acquisition line voltage. And if the single-wire disconnection fault and the double-wire disconnection fault do not exist between the measured electric core and the acquisition line, the normal connection between the measured electric core and the acquisition line is indicated. Under the condition, whether the tested electric core has faults or not is judged based on the preset upper voltage limit value and the preset lower voltage limit value, and the influence of the connection faults between the connecting lines and the storage battery on the detection result can be filtered.
The foregoing provides some specific implementation manners of the monitoring method in the battery cell testing process for the embodiments of the present application, and based on this, the present application further provides a corresponding monitoring method apparatus in the battery cell testing process. The monitoring method and apparatus in the cell testing process provided by the embodiment of the present application will be described in terms of functional modularization.
Referring to the schematic structural diagram of the monitoring method apparatus 300 in the cell testing process shown in fig. 3, the monitoring method apparatus 300 in the cell testing process includes an obtaining unit 310 and a processing unit 320.
The obtaining unit 310 is configured to periodically obtain a collecting line voltage, where the collecting line voltage is a voltage difference between two collecting lines connected to the measured electrical core, and a deviation value of the collecting line voltage is determined according to a difference between a maximum voltage and a minimum voltage of the collecting line voltage.
The processing unit 320 is configured to determine whether a deviation value of the acquired line voltage meets a first condition, where the first condition is used to indicate that a single line of the acquired line is broken, and the deviation value is determined according to a difference between a maximum value and a minimum value of the acquired line voltage; judging whether the minimum value of the acquisition line voltage meets a second condition, wherein the second condition is used for indicating the double-line disconnection of the acquisition line; and if the deviation value of the acquisition line voltage does not meet the first condition and the deviation value of the acquisition line voltage does not meet the second condition, monitoring the tested electric core based on a preset voltage upper limit value and a preset voltage lower limit value.
The embodiment of the application provides a monitoring device in a battery cell testing process. When the battery cell is tested, the output voltage of the acquisition line can be periodically acquired. Then, whether the deviation value of the collected line voltage meets a first condition or not and whether the minimum value of the collected line voltage meets a second condition or not can be judged. The first condition is used for indicating single-line disconnection of the acquisition line, and the second condition is used for indicating double-line disconnection of the acquisition line. If the voltage of the acquisition line indicates that the acquisition line has no single-line broken fault or double-line broken fault, the testing device can monitor the tested core according to the preset voltage upper limit value and voltage lower limit value. Therefore, whether the single-line broken fault exists in the acquisition line is judged based on the deviation value of the acquisition line voltage, and whether the double-line broken fault exists in the acquisition line is judged based on the minimum value of the acquisition line voltage. And if the single-wire disconnection fault and the double-wire disconnection fault do not exist between the measured electric core and the acquisition line, the normal connection between the measured electric core and the acquisition line is indicated. Under the condition, whether the tested electric core has faults or not is judged based on the preset upper voltage limit value and the preset lower voltage limit value, and the influence of the connection faults between the connecting lines and the storage battery on the detection result can be filtered.
Optionally, in some possible implementation manners, the obtaining unit 310 is specifically configured to obtain a deviation value of the collected line voltage in a plurality of monitoring periods, where the plurality of monitoring periods includes a first monitoring period, the deviation value of the collected line voltage in the first monitoring period is a difference between a maximum voltage and a minimum voltage in the first monitoring period, the maximum voltage is a maximum value of the collected line voltage in the first monitoring period, and the minimum voltage is a minimum value of the collected line voltage in the first monitoring period. The processing unit 320 is specifically configured to determine a first number, where the first number is the number of acquisition cycles for which the deviation value is not smaller than the preset deviation value; and judging whether the first quantity is larger than a first preset quantity, and if so, determining that the deviation value of the collected line voltage meets a first condition.
Optionally, in some possible implementations, the obtaining unit 310 is specifically configured to obtain a minimum value of the collected line voltage in a plurality of monitoring periods. The processing unit 320 is specifically configured to determine a second number, where the second number is the number of acquisition cycles whose minimum value is greater than a preset minimum value; and judging whether the second quantity is greater than a second preset quantity, and if so, determining that the minimum value of the collected line voltage meets a second condition.
Optionally, in some possible implementation manners, the device further includes a sending unit, where the sending unit is configured to send a fault reminder if the deviation value of the collected line voltage satisfies the first condition, or the minimum value of the collected line voltage satisfies the second condition.
Optionally, in some possible implementations, the processing unit 320 is further configured to determine whether the collected line voltage is greater than the voltage upper limit; and judging whether the voltage of the acquisition line is smaller than the lower limit value of the voltage. And the sending unit is specifically used for stopping the detection process of the tested core and sending a fault prompt in response to the fact that the voltage of the collecting line is greater than the upper limit value of the voltage or the voltage of the collecting line is less than the lower limit value of the voltage.
The embodiment of the application also provides corresponding equipment and a computer storage medium, which are used for realizing the scheme provided by the embodiment of the application.
The device includes a memory and a processor, where the memory is configured to store instructions or codes, and the processor is configured to execute the instructions or codes, so that the device executes the monitoring method in the cell test process according to any embodiment of the present application.
The computer storage medium stores a code, and when the code is executed, the apparatus for running the code implements the monitoring method in the cell testing process according to any embodiment of the present application.
In the embodiments of the present application, the names "first" and "second" (if present) in the names "first" and "second" are used for name identification, and do not represent the first and second in sequence.
As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the method of the above embodiments may be implemented by software plus a general hardware platform. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a read-only memory (ROM)/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the method according to the embodiments or some parts of the embodiments of the present application.
All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, the apparatus embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the description of the method embodiments for relevant points. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only an exemplary embodiment of the present application, and is not intended to limit the scope of the present application.
Claims (10)
1. A method for monitoring a tested electric core during a test process of the electric core, wherein the method is used for monitoring a state of the tested electric core during the test process of the tested electric core, and the tested electric core is connected with a testing device through two collecting wires, and the method comprises the following steps:
acquiring a collecting line voltage periodically, wherein the collecting line voltage is the voltage difference of two collecting lines connected with the tested battery cell, and the deviation value of the collecting line voltage is determined according to the difference between the maximum voltage and the minimum voltage of the collecting line voltage;
judging whether the deviation value of the acquisition line voltage meets a first condition, wherein the first condition is used for indicating that a single line of the acquisition line is broken, and the deviation value is determined according to the difference between the maximum value and the minimum value of the acquisition line voltage;
judging whether the minimum value of the acquisition line voltage meets a second condition, wherein the second condition is used for indicating the double-line disconnection of the acquisition line;
and if the deviation value of the collected line voltage does not meet the first condition and the deviation value of the collected line voltage does not meet the second condition, monitoring the tested electric core based on a preset voltage upper limit value and a preset voltage lower limit value.
2. The method of claim 1, wherein the determining whether the deviation value of the collected line voltage satisfies a first condition comprises:
obtaining deviation values of the acquired line voltage in a plurality of monitoring periods, wherein the plurality of monitoring periods comprise a first monitoring period, the deviation value of the acquired line voltage in the first monitoring period is the difference between the maximum voltage and the minimum voltage in the first monitoring period, the maximum voltage is the maximum value of the acquired line voltage in the first monitoring period, and the minimum voltage is the minimum value of the acquired line voltage in the first monitoring period;
determining a first number, wherein the first number is the number of acquisition cycles with deviation values not less than a preset deviation value;
and judging whether the first quantity is larger than a first preset quantity, and if so, determining that the deviation value of the collected line voltage meets a first condition.
3. The method of claim 1, wherein the determining whether the minimum value of the collected line voltage satisfies a second condition comprises:
acquiring the minimum value of the collected line voltage in a plurality of monitoring periods;
determining a second number, wherein the second number is the number of acquisition cycles with the minimum value larger than a preset minimum value;
and judging whether the second quantity is greater than a second preset quantity, and if so, determining that the minimum value of the collected line voltage meets a second condition.
4. The method according to any one of claims 1-3, further comprising:
and if the deviation value of the collected line voltage meets the first condition, or the minimum value of the collected line voltage meets the second condition, sending a fault prompt.
5. The method of claim 1, wherein the monitoring of the tested electric core based on the preset upper and lower voltage limits comprises:
judging whether the collected line voltage is greater than the voltage upper limit value or not;
judging whether the collected line voltage is smaller than the voltage lower limit value or not;
and in response to the fact that the voltage of the acquisition line is larger than the upper limit value of the voltage, or the voltage of the acquisition line is smaller than the lower limit value of the voltage, stopping a detection process of the tested electric core and sending a fault prompt.
6. A monitoring device in a battery core testing process is characterized in that the device is used for monitoring the state of a tested battery core in the testing process of the tested battery core, the tested battery core is connected with a testing device through two acquisition lines, and the device comprises:
the acquisition unit is used for periodically acquiring a collecting line voltage, wherein the collecting line voltage is the voltage difference of two collecting lines connected with the tested battery cell, and the deviation value of the collecting line voltage is determined according to the difference between the maximum voltage and the minimum voltage of the collecting line voltage;
the processing unit is used for judging whether the deviation value of the acquired line voltage meets a first condition, the first condition is used for indicating that the single line of the acquired line is broken, and the deviation value is determined according to the difference between the maximum value and the minimum value of the acquired line voltage; judging whether the minimum value of the acquisition line voltage meets a second condition, wherein the second condition is used for indicating the double-line disconnection of the acquisition line; and if the deviation value of the acquisition line voltage does not meet the first condition and the deviation value of the acquisition line voltage does not meet the second condition, monitoring the tested electric core based on a preset voltage upper limit value and a preset voltage lower limit value.
7. The apparatus of claim 6,
the acquiring unit is specifically configured to acquire a deviation value of the acquired line voltage in a plurality of monitoring periods, where the plurality of monitoring periods include a first monitoring period, the deviation value of the acquired line voltage in the first monitoring period is a difference between a maximum voltage and a minimum voltage in the first monitoring period, the maximum voltage is a maximum value of the acquired line voltage in the first monitoring period, and the minimum voltage is a minimum value of the acquired line voltage in the first monitoring period;
the processing unit is specifically configured to determine a first number, where the first number is the number of acquisition cycles for which the deviation value is not less than the preset deviation value; and judging whether the first quantity is larger than a first preset quantity, and if so, determining that the deviation value of the collected line voltage meets a first condition.
8. The apparatus of claim 6,
the acquisition unit is specifically used for acquiring the minimum value of the acquired line voltage in a plurality of monitoring periods;
the processing unit is specifically configured to determine a second number, where the second number is the number of acquisition cycles for which a minimum value is greater than a preset minimum value; and judging whether the second quantity is greater than a second preset quantity, and if so, determining that the minimum value of the collected line voltage meets a second condition.
9. The device according to any one of claims 6 to 8, further comprising a sending unit, wherein the sending unit is used for sending a fault warning when the deviation value of the collected line voltage meets the first condition or the minimum value of the collected line voltage meets the second condition.
10. A battery core test monitoring system is characterized by comprising at least one voltage acquisition board, at least one thermocouple acquisition board, a negative temperature coefficient thermistor acquisition board, a relay output board, a mother board and a Micro Control Unit (MCU) board;
the at least one voltage acquisition board, the at least one thermocouple acquisition board, the negative temperature coefficient thermistor acquisition board and the relay output board are connected with the MCU board through the motherboard;
the at least one voltage acquisition board, the at least one thermocouple acquisition board, the negative temperature coefficient thermistor acquisition board and the relay output board do not comprise an MCU.
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