CN115480174A - Battery detection device, method, electronic device and storage medium - Google Patents
Battery detection device, method, electronic device and storage medium Download PDFInfo
- Publication number
- CN115480174A CN115480174A CN202211245533.7A CN202211245533A CN115480174A CN 115480174 A CN115480174 A CN 115480174A CN 202211245533 A CN202211245533 A CN 202211245533A CN 115480174 A CN115480174 A CN 115480174A
- Authority
- CN
- China
- Prior art keywords
- battery
- target battery
- data
- test
- data acquisition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- 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
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a battery detection device, a method, an electronic device and a storage medium, wherein the battery detection device comprises: the device comprises a data analysis module and a test module with a channel switching submodule and a data acquisition submodule. The data acquisition submodule is connected with the channel switching submodule and is used for acquiring target battery data; wherein the target battery data includes an alternating internal resistance and an open circuit voltage of the target battery. And the test channel of the channel switching submodule is connected with the target battery and used for switching to the next test channel after the data acquisition of the target battery is finished. And the data analysis module is connected with the data acquisition submodule and used for judging whether the target battery is in micro short circuit or not according to the alternating current internal resistance and the open-circuit voltage. Whether the battery detection device that provides through this application embodiment detects the battery and has little short circuit, not only can not harm the battery, can also realize little short circuit detection with higher relevance ratio.
Description
Technical Field
The present disclosure relates to the field of battery detection, and in particular, to a battery detection apparatus, a battery detection method, an electronic device, and a storage medium.
Background
Secondary batteries, such as lithium ion batteries, may be affected by raw materials of the batteries, production processes, and operators during the manufacturing and use thereof, and may have safety problems such as thermal runaway, overcharge, or overdischarge. Among them, thermal runaway is the most prominent manifestation of battery safety problems, and one of the main causes of thermal runaway is internal short circuit of a battery, i.e., micro short circuit of a battery. The micro short circuit of the battery mainly comprises a micro short circuit caused by external factors and a micro short circuit caused by internal structural change of the battery or burrs of internal positive and negative pole pieces.
At present, two methods mainly exist for detecting the micro short circuit of the battery, one is detection by a hi-pot method and the like; however, the method has low detection efficiency on the micro short circuit of the battery, and false detection often occurs; and a situation may arise in which the battery is damaged. The other method is to calculate the equivalent internal resistance Z of each single battery i And through Z i Difference value DeltaZ from reference resistance i Determining whether micro short circuit occurs in the single battery; however, the method has high misjudgment probability and poor applicability.
Disclosure of Invention
An object of the embodiments of the present application is to provide a battery detection apparatus, a battery detection method, an electronic device, and a storage medium, where a data analysis module and a test unit having a channel switching submodule and a data acquisition submodule detect a battery, and further determine whether a target battery has a micro short circuit through an Open Circuit Voltage (OCV) of each channel, an alternating current internal resistance (ACR), and a sampling duration.
In a first aspect, an embodiment of the present application provides a battery detection apparatus, including: the device comprises a data analysis module and a test module with a channel switching submodule and a data acquisition submodule; the channel switching submodule comprises one or more testing channels. The data acquisition submodule is connected with the channel switching submodule and is used for acquiring target battery data; wherein the target battery data includes an alternating internal resistance and an open circuit voltage of the target battery. And the test channel of the channel switching submodule is connected with the target battery and used for switching to the next test channel after the data acquisition of the target battery is finished. And the data analysis module is connected with the data acquisition submodule and used for judging whether the target battery is in micro short circuit or not according to the alternating current internal resistance and the open-circuit voltage.
In the implementation process, the battery detection device provided by the embodiment of the application detects and acquires data of the battery through the test module; analyzing the acquired data through a data analysis module; particularly, the cooperation of the data acquisition submodule and the channel switching submodule of the test module in the battery detection device provided by the embodiment of the application can detect the alternating current internal resistance and the open-circuit voltage of the battery, and automatically switch the channel after the detection is finished. Whether the battery detection device that provides through this application embodiment detects the battery and has little short circuit, not only can not harm the battery, can also realize little short circuit detection with higher relevance ratio.
Optionally, in this embodiment of the present application, the battery detection apparatus further includes: a battery charge-discharge module; the battery charging and discharging module is connected with the target battery and used for charging the target battery to a nominal voltage.
In the implementation process, the battery detection device provided by the embodiment of the application performs constant-current charging on the target battery or the battery pack by arranging the battery charging and discharging module, and charges the target battery or the battery pack to the nominal voltage; therefore, the target battery or the battery pack can be used for testing the battery under a simulated common state, so that the test result is more reliable.
Optionally, in an embodiment of the present application, the data acquisition sub-module includes: the device comprises a data acquisition unit and a data recording unit. The data acquisition unit is connected with the channel switching submodule through a communication line and is used for detecting and acquiring alternating current internal resistance and open-circuit voltage of the target battery after the target battery charged to the nominal voltage is kept still for a preset time; the data recording unit is in communication connection with the data acquisition unit and is used for recording the alternating current internal resistance and the open-circuit voltage of the target battery; wherein the alternating internal resistance and the open circuit voltage of the target battery include: and the alternating current internal resistance and the open-circuit voltage of the target battery within a preset detection time length.
In the implementation process, the data acquisition unit and the data recording unit of the data acquisition submodule accurately acquire and record the alternating current internal resistance (ACR) and the open-circuit voltage (OCV) of the target battery within the preset detection time, so that the basic information about whether the micro short circuit exists in the battery is acquired, and a basis is provided for accurately detecting the battery with the micro short circuit.
Optionally, in this embodiment of the present application, the detecting device further includes: the device comprises a voltage anode sampling line, a current anode sampling line, a voltage cathode sampling line and a current cathode sampling line. And the voltage positive electrode sampling line and the current positive electrode sampling line are connected with a positive electrode lug of the target battery and the channel switching submodule. And the voltage negative electrode sampling line and the current negative electrode sampling line are connected with a negative electrode lug and a channel switching submodule of the target battery.
In the implementation process, the battery detection device provided by the embodiment of the application connects the target battery with the connection terminal of the channel switching submodule through a four-wire method, so that the data acquisition unit acquires alternating current internal resistance (ACR) and Open Circuit Voltage (OCV) data of each channel through the channel switching submodule. The battery testing device provided by the embodiment of the application fully considers the limitation of the number of the channels, and due to the existence of the channel switching submodule, the previous channel can be switched to the next channel to continue data acquisition and output after the previous channel is acquired.
Optionally, in an embodiment of the present application, the battery test apparatus further includes a battery test cabinet having a compressor, an evaporator, and a dry filter; the test module is arranged in the battery test cabinet; the compressor, evaporator and dry filter are used to control the temperature of the battery test cabinet.
In the implementation process, the test module is arranged in the battery test cabinet, the temperature is controlled through the compressor, the evaporator, the drying filter and the like, the temperature of the battery test cabinet is controllable, and the test progress can be controlled through temperature regulation.
Optionally, in an embodiment of the present application, the data analysis module includes: a data acquisition unit and a data analysis unit. The data acquisition unit is in communication connection with the test module and is used for acquiring alternating current internal resistance and open-circuit voltage of the target battery within a preset detection time period. The data analysis unit is connected with the data acquisition unit and used for calculating a change value of the open-circuit voltage and a ratio of the open-circuit voltage to the preset detection duration according to the alternating-current internal resistance and the open-circuit voltage in the preset detection duration, comparing the change value and the ratio with a preset change threshold and a preset ratio, and judging that the target battery has the micro short circuit when the change value exceeds the preset change threshold or the ratio exceeds the preset ratio.
In the implementation process, the acquired Open Circuit Voltage (OCV), alternating current internal resistance (ACR) and sampling duration of each channel can be calculated and analyzed through the arrangement of the data acquisition unit and the data analysis unit, and the channels exceeding a preset ratio or a change threshold are screened out, so that the batteries with micro short circuits are accurately acquired.
Optionally, in this embodiment of the present application, the battery detection apparatus further includes a battery information obtaining module. The battery information acquisition module is in communication connection with the data analysis module and is used for acquiring information of the target battery and sending the information to the data analysis module.
In the implementation process, before the test is started, the battery information acquisition module is used for acquiring the basic information of the battery, and the basic information of the battery is sent to the data analysis module, so that the battery corresponds to the data acquired by the data acquisition unit, and the detection of the battery micro short circuit is efficiently realized.
In a second aspect, an embodiment of the present application provides a battery detection method, which is applied to a battery detection device; the battery detection device comprises a data analysis module and a test module with a channel switching submodule and a data acquisition submodule; the channel switching submodule comprises one or more testing channels. Collecting target battery data by a data collection submodule; wherein the target battery data includes an alternating current internal resistance and an open circuit voltage of the target battery. And switching to the next test channel by the channel switching submodule after the target battery data acquisition is finished. And judging whether the target battery is in micro short circuit or not by the data analysis module according to the alternating current internal resistance and the open-circuit voltage.
In the implementation process, the battery testing method provided by the embodiment of the application uses the battery testing device to realize the detection of the micro short circuit of the battery; the device has high integration level, simple equipment operation and high detection efficiency on the micro short circuit of the battery; and the test duration can be controlled by controlling the temperature of the battery test cabinet.
In a third aspect, an embodiment of the present application provides an electronic device, where the electronic device includes a memory and a processor, where the memory stores program instructions, and the processor executes the steps in the implementation manner of the second aspect when reading and executing the program instructions.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, where computer program instructions are stored in the computer-readable storage medium, and when the computer program instructions are read and executed by a processor, the steps in the implementation manner of the second aspect are performed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a first schematic view of a battery detection apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic connection diagram of a battery detection apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic block diagram of a battery detection apparatus according to an embodiment of the present disclosure;
FIG. 4 is a second schematic diagram of a battery detection apparatus according to an embodiment of the present disclosure;
FIG. 5 is a flow chart of a battery detection method according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
An icon: battery test device-100; a target cell-1; a data analysis module-110; a data acquisition unit-112; a data analysis unit-114; a test module-120; channel switching submodule-122; test channel-1220; data acquisition submodule-124; a data acquisition unit-1242; a data recording unit-1244; a battery charge and discharge module-130; voltage positive sample line-140; current positive sampling line-150; voltage negative sampling line-160; current negative sampling line-170; positive electrode clamp-101; a negative electrode clamp-102; a wiring terminal-103; a battery placing rack-104; compressor-180; an evaporator-181; a drier-filter-182; a battery information acquisition module-190.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. For example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The applicant finds in the research process that the current detection of the battery micro short circuit is mainly divided into two types. One is detection by means of hi-pot and the like, and the other is calculation of equivalent internal resistance Zi of each single battery, and whether the single battery is in micro short circuit or not is determined according to the difference value delta Zi between Zi and reference resistance.
Specifically, in the hi-pot method and the like, a certain pressure and voltage are applied to the battery cell before the liquid injection of the battery cell, and whether the micro short circuit occurs is judged according to the resistance or the leakage current of the battery cell. However, the method has low detection rate for the battery with unobvious micro short circuit, and the battery is easy to be misjudged and flows into the next manufacturing procedure as a normal battery; meanwhile, the high voltage of the hi-pot tester is easy to break down the diaphragm or damage the performance of the diaphragm to different degrees, thereby finally influencing the performance of the lithium ion battery.
By acquiring terminal voltage U of single battery i And calculating the equivalent internal resistance Z of each single battery i And through Z i Difference value DeltaZ from reference resistance i And determining whether the micro short circuit of the single battery occurs. The reference resistance is the average value of the equivalent internal resistances of all the single batteries in the battery pack. If the number of the single batteries connected in series in the Battery pack is large, the calculation amount of calculating the equivalent internal resistance of each single Battery in real time in the micro short circuit detection mode in the prior art is large, the requirement on hardware of a Battery Management System (BMS) is high, and the realization difficulty is large. Furthermore, as the battery pack ages, the inconsistencies of the individual cells in the battery pack may increase, using Δ Z i When the value judges the micro short circuit of the battery, the inconsistency of the battery is easy to judge as the micro short circuit, and the internal resistance change caused by faults such as contact resistance is easy to be mistaken as the micro short circuit, so the misjudgment probability is high, and the applicability is poor.
Based on this, the battery detection device and the battery detection method provided by the embodiment of the application detect the battery through the data analysis module and the test unit with the channel switching submodule and the data acquisition submodule, and further judge whether the target battery has a micro short circuit or not through the Open Circuit Voltage (OCV) of each channel, the alternating current internal resistance (ACR) and the sampling duration.
Referring to fig. 1, fig. 1 is a first schematic view of a battery detection apparatus according to an embodiment of the present disclosure; the battery detection device 100 comprises a data analysis module 110 and a test module 120 with a channel switching submodule 122 and a data acquisition submodule 124; the channel switching sub-module 122 includes one or more test channels 1220.
The data acquisition submodule 124 is connected with the channel switching submodule 122 and is used for acquiring data of the target battery 1; wherein the target battery 1 data includes the alternating internal resistance and the open circuit voltage of the target battery 1.
The test channel 1220 of the channel switching submodule 122 is connected to the target battery 1, and is configured to switch to the next test channel 1220 after the data acquisition of the target battery 1 is completed.
The data analysis module 110 is connected to the data acquisition submodule 124 and is configured to determine whether the target battery 1 is micro-shorted according to the ac internal resistance and the open-circuit voltage.
As can be seen from fig. 1, the battery detection apparatus 100 provided in the embodiment of the present application detects and collects data of a battery through the test module 120; analyzing the collected data through the data analysis module 110; in particular, in the battery detection apparatus 100 provided in the embodiment of the present application, the data acquisition submodule 124 and the channel switching submodule 122 of the test module 120 are matched to detect the ac internal resistance and the open-circuit voltage of the battery, and perform automatic switching of the channel after the detection is completed. Whether the battery detection device 100 detects that the battery has the micro short circuit or not does not damage the battery, and the micro short circuit detection can be realized with a high detection rate.
Please refer to fig. 2, fig. 2 is a schematic connection diagram of a battery detection apparatus according to an embodiment of the present disclosure; the battery test apparatus 100 further includes a battery charging and discharging module 130.
The battery charge-discharge module 130 is connected to the target battery 1, and is configured to charge the target battery 1 to a nominal voltage.
Illustratively, the battery charge-discharge module 130 is connected with the target battery 1 through a voltage-current sampling line of the battery charge-discharge module 130; the target battery 1 is charged with a constant current until it is charged to a nominal voltage. It should be noted that the nominal voltage is related to the performance of the battery itself, and different batteries have different nominal voltages.
As can be seen from fig. 2, the battery detection apparatus 100 provided in the embodiment of the present application is configured with the battery charge-discharge module 130 to perform constant current charging on the target battery 1 or the battery pack, and charge the target battery to the nominal voltage; therefore, the target battery 1 or the battery pack can be used for testing the battery under a simulated common state, and the test result is more reliable.
Please refer to fig. 3, fig. 3 is a schematic block diagram of a battery detection apparatus according to an embodiment of the present disclosure; the data acquisition submodule 124 of the battery test apparatus 100 includes a data acquisition unit 1242 and a data recording unit 1244.
The data acquisition unit 1242 is connected to the channel switching submodule 122 through a communication line, and is configured to detect and acquire the ac internal resistance and the open-circuit voltage of the target battery 1 after the target battery 1 charged to the nominal voltage is left standing for a preset time. Illustratively, the data acquisition unit 1242 may be a battery tester-day BT3562, which may sample the open circuit voltage and the ac internal resistance across the sample with a voltage sampling accuracy of 100 microvolts (μ V), a resistance sampling accuracy of 0.1 microohms (μ Ω), and a minimum sampling period of 4ms.
The data recording unit 1244 is in communication connection with the data acquisition unit 1242 and is used for recording the alternating current internal resistance and the open-circuit voltage of the target battery 1; wherein the alternating internal resistance and the open circuit voltage of the target battery 1 include: the alternating internal resistance and the open circuit voltage of the target battery 1 within a preset detection period.
Illustratively, after charging the target battery 1 or the target battery 1 group to the nominal voltage, the charging is stopped. After the target battery 1 or the battery pack is left to stand for a preset time, the data acquisition is controlled but the unit acquires the alternating current internal resistance (ACR) and the Open Circuit Voltage (OCV) of each channel, and the alternating current internal resistance (ACR) and the Open Circuit Voltage (OCV) acquired for the first time are used as the initial alternating current internal resistance (ACR 0) and the initial open circuit voltage (OCV 0). The data recording unit-1244 acquires the alternating internal resistance (ACR) and the Open Circuit Voltage (OCV) of the target battery 1 or the battery pack for a preset detection period from the data acquisition unit 1242. It can be understood by those skilled in the art that the detection can be stopped manually or automatically when the preset detection time is reached; and records the ac internal resistance (ACR) and the Open Circuit Voltage (OCV) at the end as the terminal open circuit voltage (OCVf) and the terminal ac internal resistance (ACRf). The data recording unit-1244 actively outputs reports on the ac internal resistance (ACR) and the Open Circuit Voltage (OCV).
It should be noted that the preset time for the battery to stand is related to the type and performance of the battery, and the preset time for different batteries may not be consistent. In practical applications, the predetermined time period is generally 1 hour or more than 1 hour.
Therefore, in the embodiment of the present application, the data acquisition unit 1242 and the data recording unit 1244 of the data acquisition sub-module 124 accurately acquire and record the alternating current internal resistance (ACR) and the Open Circuit Voltage (OCV) of the target battery 1 within the preset detection time, so as to acquire the basic information about whether a micro short circuit exists in the battery, and provide a basis for accurately detecting the battery with the micro short circuit.
Please continue to refer to fig. 2; the battery test apparatus further includes a voltage positive sampling line 140, a current positive sampling line 150, a voltage negative sampling line 160, and a current negative sampling line 170.
The voltage positive sampling line 140 and the current positive sampling line 150 are connected to the positive tab of the target cell 1 and the channel switching submodule 122. The voltage negative sampling line 160 and the current negative sampling line 170 are connected with the negative tab and channel switching submodule 122 of the target battery 1.
Illustratively, the battery charge and discharge module 130 is connected to the positive and negative clamps 101 and 102 of the target battery 1 through voltage and current sampling lines as shown in fig. 2. The positive electrode of the target battery 1 is connected with the channel switching submodule 122 through a voltage positive electrode sampling line 140 and a current positive electrode sampling line 150; the negative pole of the target battery 1 is connected to the channel switching submodule 122 via a voltage negative pole sampling line 160 and a current negative pole sampling line 170. Further, the channel switching sub-module 122 is connected to the data acquisition unit 1242 via a communication line.
It should be noted that, in fig. 2, only one battery channel is connected to the battery charging and discharging module 130 and the channel switching submodule 122; in practical applications, each battery channel is connected to the battery charging and discharging module 130 and the channel switching submodule 122 in the above-mentioned connection manner, that is, in a four-wire connection manner. Each channel corresponds to one group of terminals 103, for example, the battery testing device comprises 60 wiring channels, and then corresponds to 60 groups of terminals 103; in the embodiment of the present application, one target battery 1, one battery channel, and one set of connection terminals 103 are illustrated, but the number of target batteries 1, the number of battery channels, and the number of connection terminals 103 may be changed in response to actual situations, and should not be limited in the embodiment of the present application.
It will be appreciated by those skilled in the art that the voltage negative sample line 160, the current negative sample line 170, the voltage positive sample line 140, and the current positive sample line 150 are all connected to the channel switching submodule 122 via the connection terminal 103. In collecting data, the data collecting unit 1242 collects alternating current internal resistance (ACR) and Open Circuit Voltage (OCV) data of each channel through the channel switching sub-module 122.
As can be seen from fig. 2, the battery detection apparatus 100 according to the embodiment of the present application connects the target battery 1 to the connection terminal 103 of the channel switching submodule 122 through a four-wire method, so that the data acquisition unit 1242 acquires the alternating current internal resistance (ACR) and the Open Circuit Voltage (OCV) data of each channel through the channel switching submodule 122. The battery testing device provided by the embodiment of the application fully considers the limitation of the number of the channels, and due to the existence of the channel switching submodule 122, after the acquisition of the previous channel is finished, the previous channel is switched to the next channel to continue the acquisition and the output of data.
With continued reference to fig. 3, the battery test apparatus 100 further includes a battery test cabinet 200 having a compressor 180, an evaporator 181, and a dry filter 182; the test module 120 is disposed in the battery test cabinet. The compressor 180, the evaporator 181 and the dry filter 182 are used to control the temperature of the battery test cabinet 200.
Exemplarily, the test module 120 is placed in the battery test cabinet 200, and the cabinet body of the battery test cabinet 200 is hermetically arranged; a compressor 180, an evaporator 181, a dry filter 182, an electronic expansion valve, etc. for controlling temperature may be installed under the cabinet. As will be appreciated by those skilled in the art, the temperature of the cabinet will generally be set at 0 deg.C to 60 deg.C; the temperature deviation can be +/-2 ℃, the temperature fluctuation degree is about +/-0.4 ℃, different temperatures can be set according to design requirements, and the test progress can be accelerated by increasing the temperature.
Therefore, the temperature of the battery test cabinet 200 can be controlled by placing the test module 120 in the battery test cabinet 200 and controlling the temperature through the compressor 180, the evaporator 181, the dry filter 182, and the like, and the progress of the test can be controlled by adjusting the temperature.
With continued reference to fig. 2 and fig. 3, the data analysis module 110 shown in fig. 3 includes a data obtaining unit 112 and a data analysis unit 114.
The data obtaining unit 112 is connected to the testing module 120 in a communication manner, and is configured to obtain the ac internal resistance and the open-circuit voltage of the target battery 1 within a preset detection time period.
The data analysis unit 114 is connected to the data acquisition unit 112, and is configured to calculate a change value of the open-circuit voltage and a ratio of the open-circuit voltage to the preset detection duration according to the alternating-current internal resistance and the open-circuit voltage in the preset detection duration, compare the change value and the ratio with a preset change threshold and a preset ratio, and determine that the target battery 1 has a micro short circuit when the change value exceeds the preset change threshold or the ratio exceeds the preset ratio.
Exemplarily, in fig. 2, the data acquisition unit 1242 in the data analysis module 110 is connected to the data testing module 120 through a communication line, and the data testing module 120 acquires the Open Circuit Voltage (OCV), the alternating internal resistance (ACR) and the sampling duration of each channel in real time; the data analysis unit 114 connected to the data acquisition unit 112 calculates a voltage drop (Δ OCV) and a ratio of the voltage drop and a sampling period (Δ OCV/t) from each channel open-circuit voltage (OCV), the alternating-current internal resistance (ACR), and the sampling period. Further, comparing the change value and the ratio with a preset change threshold value and a preset ratio value, and when the change value or the change threshold value exceeds the preset ratio value or the change threshold value, determining that the battery is in micro short circuit; while the data analysis unit 114 sets the channel battery status to "abnormal".
With reference to table 1, table 1 is an example of the electrical measurement results of the micro short circuit of the battery provided in the embodiments of the present application, wherein the Δ OCV threshold is 15mV, and the Δ OCV/t threshold is 0.2mV/h; acquiring a battery bar code corresponding to each channel, outgoing book open-circuit voltage and initial alternating current internal resistance; after the Open Circuit Voltage (OCV), the alternating current internal resistance (ACR) and the sampling time length of each channel are measured, the voltage drop (delta OCV) and the ratio (delta OCV/t) of the voltage drop and the sampling time length are calculated, and whether the voltage drop and the sampling time length exceed the corresponding threshold value is judged. In table 1, the voltage drop (Δ OCV) of the passage 4 and the ratio of the voltage drop and the sampling period (Δ OCV/t) in the voltage drop (Δ OCV) and the ratio of the voltage drop and the sampling period (Δ OCV/t) of the passages 1 to 4 each exceed the threshold value; therefore, the battery state corresponding to the channel 4 is determined to be abnormal; that is, there is a micro short circuit in the target cell corresponding to the channel 4.
TABLE 1
It should be noted that the preset ratio and the variation threshold in the embodiment of the present application are related to battery performance, and the preset ratio and the variation threshold of the battery of different batches or different manufacturers may be different; but are all related to the self-discharge rate of the battery. For example, the threshold may be set to a value where Δ OCV/t of one passage varies significantly in value from Δ OCV/t of the other passages, e.g., by more than 100% or 200% of Δ OCV/t of the other passages; alternatively, the threshold may indicate the first few passages with the largest value of Δ OCV/t after counting the values of Δ OCV/t or the passage corresponding to the first ranked (e.g., the first 0.1%) Δ OCV/t. The value and the specific setting mode of the threshold are not specifically limited, and both a statistical mode and a threshold setting mode which can reflect differences in the field belong to the category pointed by the threshold in the application.
Therefore, the acquired Open Circuit Voltage (OCV), alternating current internal resistance (ACR) and sampling duration of each channel can be calculated and analyzed through the arrangement of the data acquisition unit 1242 and the data analysis unit 114, and channels exceeding a preset ratio or a change threshold are screened out, so that the battery with the micro short circuit can be accurately acquired.
Referring to fig. 4, fig. 4 is a second schematic view of a battery detection apparatus according to an embodiment of the present disclosure; referring to fig. 3 in combination, the battery detection apparatus 100 further includes a battery information obtaining module 190. The battery information obtaining module 190 is in communication connection with the data analysis module 110, and is configured to obtain information of the target battery 1 and send the information to the data analysis module 110. For example, the battery information obtaining module 190 may be a code scanning gun, or other device or device capable of obtaining basic model information of a battery; the data analysis module 110 may be a host computer.
Therefore, before the test is started, the battery information acquisition module 190 is used for acquiring the basic information of the battery, and the basic information of the battery is sent to the data analysis module 110, so that the battery is corresponding to the data acquired by the data acquisition unit 112, and the detection of the micro short circuit of the battery is realized at high efficiency and low efficiency.
Referring to fig. 3, the battery testing apparatus 100 provided in the embodiment of the present application further includes a battery rack 104. The battery placement frame 104 is connected with the channel switching submodule 122 and the battery charging and discharging module 130, and one battery placement frame 104 can contain a plurality of target batteries 1; one or more battery cages 104 may be included in the battery test apparatus 100.
Referring to fig. 5, fig. 5 is a flowchart of a battery detection method according to an embodiment of the present disclosure; the battery detection method is applied to a battery detection device; the battery detection device comprises a data analysis module and a test module with a channel switching submodule and a data acquisition submodule; the channel switching submodule includes one or more test channels. The method comprises the following steps:
step S100: and the data acquisition submodule acquires target battery data.
Step S101: and the channel switching submodule switches to the next testing channel after the target battery data acquisition is finished.
Step S102: and judging whether the target battery is in micro short circuit or not by the data analysis module according to the alternating current internal resistance and the open-circuit voltage.
In the above steps S100 to S102, before the test is started, the data analysis module, the test module, the battery charge/discharge module, the battery information acquisition module, and the like are connected. The battery information acquisition module inputs the battery number into the data analysis module through the bar code information of the target battery; placing a target battery into the test channel; and debugging the temperature of the test cabinet.
Further, charging the target battery to a nominal voltage in a constant current charging mode; standing the target battery 1 for 1 hour or more than 1 hour; and controlling a test module to start testing, and acquiring Open Circuit Voltage (OCV), alternating current internal resistance (ACR) and sampling duration of each channel in real time. The data analysis module calculates the voltage drop (delta OCV) and the ratio (delta OCV/t) of the voltage drop and the sampling duration, and automatically judges whether the battery is in micro short circuit or not according to a set threshold value; when the battery is subjected to micro short circuit, the battery state information of the channel is automatically changed from 'normal' to 'abnormal'. The battery testing method provided in the embodiment of the present application may also be implemented correspondingly based on the battery detection apparatus provided in the first aspect of the present application, and the optional implementation manner and connection relationship thereof, and will not be described herein again.
In the implementation process, the battery testing method provided by the embodiment of the application uses the battery testing device to realize the detection of the micro short circuit of the battery; the device integration level is high, the equipment operation is simple, and the detection efficiency of the battery micro short circuit is high; and the test duration can be controlled by controlling the temperature of the battery test cabinet 200.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. An electronic device 300 provided in an embodiment of the present application includes: a processor 301 and a memory 302, the memory 302 storing machine readable instructions executable by the processor 301, the machine readable instructions when executed by the processor 301 performing the method as above.
Based on the same inventive concept, embodiments of the present application further provide a computer-readable storage medium, where computer program instructions are stored, and when the computer program instructions are read and executed by a processor, the computer program instructions perform steps in any of the above-mentioned implementation manners.
The computer-readable storage medium may be a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and other various media capable of storing program codes. The storage medium is used for storing a program, and the processor executes the program after receiving an execution instruction.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some communication interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
Alternatively, all or part of the implementation may be in software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part.
The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.).
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A battery test device, comprising: the device comprises a data analysis module and a test module with a channel switching submodule and a data acquisition submodule; wherein the channel switching submodule comprises one or more test channels;
the data acquisition submodule is connected with the channel switching submodule and is used for acquiring target battery data; wherein the target battery data includes an alternating internal resistance and an open circuit voltage of the target battery;
the test channel of the channel switching submodule is connected with a target battery and used for switching to a next test channel after the data acquisition of the target battery is finished;
and the data analysis module is connected with the data acquisition submodule and used for judging whether the target battery is in micro short circuit or not according to the alternating current internal resistance and the open-circuit voltage.
2. The apparatus of claim 1, wherein the battery test apparatus further comprises: a battery charge-discharge module;
the battery charging and discharging module is connected with the target battery and used for charging the target battery to a nominal voltage.
3. The apparatus of claim 2, wherein the data acquisition sub-module comprises: the data acquisition unit and the data recording unit;
the data acquisition unit is connected with the channel switching submodule through a communication line and is used for detecting and acquiring alternating current internal resistance and open-circuit voltage of a target battery after the target battery charged to the nominal voltage is kept still for a preset time; wherein the preset time length is related to the type of the target battery
The data recording unit is in communication connection with the data acquisition unit and is used for recording the alternating current internal resistance and the open-circuit voltage of the target battery; wherein the alternating internal resistance and the open circuit voltage of the target battery include: and the alternating current internal resistance and the open-circuit voltage of the target battery within a preset detection time length.
4. The apparatus of claim 1, wherein the battery test apparatus further comprises: a voltage anode sampling line, a current anode sampling line, a voltage cathode sampling line and a current cathode sampling line;
the voltage positive electrode sampling line and the current positive electrode sampling line are connected with a positive electrode lug of the target battery and the channel switching submodule;
the voltage negative electrode sampling line and the current negative electrode sampling line are connected with the negative electrode lug of the target battery and the channel switching submodule.
5. The apparatus of claim 1, wherein the battery test apparatus further comprises a battery test cabinet having a compressor, an evaporator, and a dry filter;
the test module is arranged in the battery test cabinet;
the compressor, the evaporator and the dry filter are used for controlling the temperature of the battery test cabinet.
6. The apparatus of claim 3, wherein the data analysis module comprises: a data acquisition unit and a data analysis unit;
the data acquisition unit is in communication connection with the test module and is used for acquiring the alternating current internal resistance and the open-circuit voltage of the target battery within the preset detection time;
the data analysis unit is connected with the data acquisition unit and used for calculating a change value of the open-circuit voltage and a ratio of the open-circuit voltage to the preset detection duration according to the alternating-current internal resistance and the open-circuit voltage in the preset detection duration, comparing the change value with the ratio with a preset change threshold value and a preset ratio value, and judging that the target battery has micro short circuit when the change value exceeds the preset change threshold value or the ratio exceeds the preset ratio value.
7. The device of claim 1, wherein the battery detection device further comprises a battery information acquisition module;
the battery information acquisition module is in communication connection with the data analysis module and is used for acquiring the information of the target battery and sending the information to the data analysis module.
8. The battery detection method is characterized by being applied to a battery detection device; the battery detection device comprises a data analysis module and a test module with a channel switching submodule and a data acquisition submodule; the channel switching submodule comprises one or more test channels;
collecting target battery data by the data collection submodule; wherein the target battery data includes an alternating internal resistance and an open circuit voltage of the target battery;
the channel switching submodule is used for switching to a next testing channel after the target battery data is acquired;
and judging whether the target battery is in micro short circuit or not by the data analysis module according to the alternating current internal resistance and the open-circuit voltage.
9. An electronic device, comprising a memory having program instructions stored therein and a processor that, when executed, performs the steps of the method of any of claim 8.
10. A computer-readable storage medium having computer program instructions stored thereon for execution by a processor to perform the steps of the method of any one of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211245533.7A CN115480174A (en) | 2022-10-12 | 2022-10-12 | Battery detection device, method, electronic device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211245533.7A CN115480174A (en) | 2022-10-12 | 2022-10-12 | Battery detection device, method, electronic device and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115480174A true CN115480174A (en) | 2022-12-16 |
Family
ID=84396409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211245533.7A Pending CN115480174A (en) | 2022-10-12 | 2022-10-12 | Battery detection device, method, electronic device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115480174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116165557A (en) * | 2023-04-18 | 2023-05-26 | 深圳市思远半导体有限公司 | Battery detection method and device, electronic equipment and readable storage medium |
-
2022
- 2022-10-12 CN CN202211245533.7A patent/CN115480174A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116165557A (en) * | 2023-04-18 | 2023-05-26 | 深圳市思远半导体有限公司 | Battery detection method and device, electronic equipment and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3550317B1 (en) | Method and device for detecting battery micro-short circuit | |
| CN107870301B (en) | Method and device for detecting micro short circuit of battery | |
| WO2021169487A1 (en) | Short-circuit monitoring method, system and device for cells in power battery | |
| US5744962A (en) | Automated data storing battery tester and multimeter | |
| US20230109419A1 (en) | Insulation monitoring method and system for traction battery and apparatus | |
| CN105304954A (en) | Battery grouping method and battery grouping system | |
| CN110133536A (en) | Determine system, the method and apparatus of the index of battery group object internal leakage electric current | |
| CN108333548A (en) | Insulation resistance measuring apparatus and fault self-diagnosis method | |
| US11815558B2 (en) | Apparatus and method for diagnosing abnormal degradated battery cell | |
| CN112104015B (en) | Battery charging method and device, terminal equipment and storage medium | |
| CN111239633B (en) | Battery pack pressure difference reason analysis method and device and computer equipment | |
| CN112098875A (en) | Lithium ion battery lithium analysis detection method | |
| CN115480174A (en) | Battery detection device, method, electronic device and storage medium | |
| CN116068420A (en) | Battery consistency correction method | |
| CN113188582B (en) | System and method for testing data acquisition precision of battery management system | |
| CN114487884A (en) | Battery detection method and device, battery system and electronic equipment | |
| CN113625185A (en) | Automatic screening and grouping system for lithium batteries | |
| KR20220102454A (en) | Apparatus and method for diagnosing battery system | |
| CN113767294A (en) | Battery management device and method | |
| WO2023132602A1 (en) | Device and method for detecting deteriorated battery cell | |
| CN217238322U (en) | Lithium ion battery self-discharge rate test circuit | |
| EP4203141A1 (en) | Apparatus and method for diagnosing battery system | |
| CN117347887B (en) | Method, system and device for testing self-discharge of battery | |
| CN118033448A (en) | Method and device for detecting battery lugs | |
| CN114994557A (en) | Battery health state detection method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230726 Address after: 330800 North of Yongan Avenue, South of Jinxiu Avenue, Gao'an High-tech Industrial Park, Yichun City, Jiangxi Province Applicant after: JIANGXI TONGRUI NEW ENERGY TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: No. 155, Nanlu Road, Pudong New Area, Shanghai, 201203 Applicant before: SHANGHAI ENJIE NEW MATERIAL TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right |