Battery cell insulation test system and battery cell insulation test method

Abstract

A battery cell insulation test system (0) and a battery cell insulation test method. The system (0) comprises: an insulation tester (3), in response to a received test starting signal and according to a preset test procedure, testing a battery cell under test to obtain a preliminary test result; a superordinate computer (1), in response to the received preliminary test result, sending the preliminary test result and a test completion signal to a control device (2), collecting process data generated in the test process of said battery cell in a first time period, and obtaining a final test result on the basis of the process data; and the control device (2), in response to the received preliminary test result and test completion signal, releasing said battery cell from a test station of the insulation tester (3), in response to a received battery cell check signal, determining a target battery cell under test of the battery cell check signal, and determining a battery cell circulation direction of said target battery cell on the basis of a preliminary test result and a final test result of said target battery cell.

Description

Battery cell insulation test system and battery cell insulation test method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on Chinese patent application number 202410175568.0, application date February 7, 2024, and invention name “Battery Cell Insulation Test System and Battery Cell Insulation Test Method”, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into the present disclosure as a reference. Technical Field

[0003] The present disclosure relates to the technical field of battery production, and in particular to a battery cell insulation testing system and a battery cell insulation testing method. Background Art

[0004] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0005] Batteries are obtained by testing cells through multiple processes. Currently, when cells are tested one by one, it is necessary to determine whether the test has passed after the test is completed before the cell can be released from the testing process. Due to the complex logic during the determination, the determination time is long, which will increase the time takt of this process and reduce the efficiency of cell testing.

[0006] Summary of the Invention

[0007] In order to solve the above technical problems, the purpose of the present disclosure is to provide a battery cell insulation testing system and a battery cell insulation testing method.

[0008] The present disclosure is achieved through the following technical solutions.

[0009] The first aspect of the present disclosure provides a battery cell insulation test system, the system comprising a host computer, a control device and an insulation tester; wherein: the insulation tester is used to respond to a received test start signal, test the battery cell to be tested according to a preset test process, and send the preliminary test results to the host computer after obtaining the preliminary test results; the host computer is used to respond to the received preliminary test results, send the preliminary test results and a test completion signal to the control device; and collect process data generated during the insulation test of the battery cell to be tested within a first time period, obtain a final test result based on the process data, and send it to the control device. control device; the control device is used to respond to the received preliminary test result and the test completion signal, and release the battery cell to be tested from the test station of the insulation tester; the control device is also used to respond to the received battery cell verification signal, determine the target battery cell to be tested corresponding to the battery cell verification signal, and determine the battery cell flow direction of the target battery cell to be tested according to the target preliminary test result and the target final test result corresponding to the target battery cell to be tested; wherein, the first time period is less than the time period in which the control device receives the battery cell verification signal after releasing the target battery cell to be tested from the test station.

[0010] Based on this, the control device only needs to determine the target battery cell to be tested targeted by the battery cell verification signal when receiving the battery cell verification signal, and then take out the target preliminary test result and the target final test result of the target battery cell to be tested from its own storage area, and finally determine the battery cell flow direction of the target battery cell to be tested according to the target preliminary test result and the target final test result; the battery cell insulation test method proposed in the present disclosure is an asynchronous test method, which saves the waiting time for logical analysis of the process data generated in the battery cell insulation test, ensures that the equipment continuously and stably reaches the fastest production speed, reduces the bottleneck of workstation speed-up, and thus can improve the test efficiency of the battery cell while ensuring the reliability of the test results.

[0011] In some embodiments of the present disclosure, the system further comprises a photoelectric sensor; wherein: the photoelectric sensor is used to send a cell arrival signal to the control device when it detects that the cell to be tested has arrived at the test station; the control device is further used to send a test trigger signal to the host computer in response to the received cell arrival signal; the host computer is further used to determine the working state of the insulation tester in response to the received test trigger signal, and send the test start signal to the insulation tester when the working state is the standby state.

[0012] Based on this, the test process is triggered only for the battery cells entering this test station, which can save test time and avoid wasting time on battery cells that fail to enter the station, thereby improving the efficiency of battery cell insulation testing.

[0013] In some embodiments of the present disclosure, the host computer is further used to send a working status acquisition instruction to the insulation tester; the insulation tester is further used to respond to the received working status acquisition instruction, determine the working status, and send the working status to the host computer; wherein the working status includes at least the standby state, test state and abnormal state.

[0014] Based on this, the host computer first determines the test status of the insulation tester before sending the test start signal. Only when it is determined that the test status of the insulation tester is in standby state will it send the test start signal to the insulation tester. This can avoid mismeasurement and thus improve the reliability of the battery cell insulation test.

[0015] In some embodiments of the present disclosure, the host computer is further used to send the working status acquisition instruction to the insulation tester again after a preset time interval if the received working status is not the standby status, and to determine again whether the working status is the standby status; the host computer is further used to send a first alarm message to the control device if it is determined that the working status is not the standby status for a preset number of consecutive times; the control device is further used to stop the operation of the insulation tester in response to the received first alarm message.

[0016] Based on this, if the host computer fails to obtain the standby state from the insulation tester for multiple times, it sends an alarm message to the control device, informing the control device that the insulation tester may have an abnormality, so that the control device can promptly remind the user to check the insulation tester.

[0017] In some embodiments of the present disclosure, the host computer is further used to send a second alarm message to the control device if the working status returned by the insulation tester is not received within a second time period after the working status acquisition instruction is issued; the control device is further used to respond to the received second alarm message and detect the communication connection between the host computer and the insulation tester.

[0018] In some embodiments of the present disclosure, the host computer is further used to send a process data acquisition instruction to the insulation tester; the insulation tester is further used to respond to the received process data acquisition instruction, collect the process data generated by the battery cell to be tested during the test process; and send the process data to the host computer; the process data includes the battery cell resistance value exhibited by the battery cell to be tested during the test process as the voltage applied by the insulation tester; the host computer is further used to respond to the received process data, judge the process data according to preset judgment rules, obtain the final test result and send it to the control device.

[0019] Based on this, the host computer carefully analyzes whether any abnormal situation occurs during the test of the battery cell to be tested according to the process data, and obtains the final test results, which can improve the accuracy of the test results.

[0020] In some embodiments of the present disclosure, the host computer is further used to respond to the received process data and search for the battery cell production file within the current time period; the current time period is the time period from the first time point to the second time point, and the current time period includes the time point when the test of the battery cell to be tested starts; the host computer is further used to determine whether the battery cell production file is currently occupied by other processes if the search is successful, and if the battery cell production file is occupied, create a new battery cell production file from the current time point to the second time point, set usage permissions for the new battery cell production file, and write the battery cell code and the process data of the battery cell to be tested into the new battery cell production file; the host computer is further used to set the usage permissions for the battery cell production file if the battery cell production file is not occupied, and write the battery cell code and the process data into the battery cell production file; wherein, the usage permissions are that the other processes are allowed to use the battery cell production file or the new battery cell production file only in read-only mode, and are not allowed to edit the battery cell production file or the new battery cell production file.

[0021] Based on this, before writing data to the cell production file, set permissions for the cell production file to prevent other processes from affecting the data writing process.

[0022] In some embodiments of the present disclosure, the system further includes a gripper device; wherein: the control device is further configured to send a first instruction to the gripper device if both the target preliminary test result and the target final test result indicate that the target battery cell to be tested has passed the test, and to send a second instruction to the gripper device if one of the target preliminary test result and the target final test result indicates that the target battery cell to be tested has failed the test; the gripper device is configured to respond to the received first instruction and transfer the target battery cell to a normal unloading pull belt so that the normal unloading pull belt can move the target battery cell to the next process; the gripper device is configured to respond to the received second instruction and transfer the target battery cell to an abnormal unloading pull belt so that the abnormal unloading pull belt can move the target battery cell to a defective battery cell placement site.

[0023] Based on this, only the cells to be tested that have successfully passed the test process can be moved to the next process, thereby ensuring the production quality of the cells to be tested.

[0024] The second aspect of the present disclosure provides a battery production line, comprising production equipment, transfer equipment and the battery cell insulation testing system of any one of the first aspects, wherein the production equipment is used to produce battery cells to be tested, and the transfer equipment is used to take the battery cells to be tested out of the production equipment and place them in the battery cell insulation testing system, or, take the battery cells to be tested that have completed the test out of the battery cell insulation testing system and transfer them to a target workstation.

[0025] The third aspect of the present disclosure provides a cell insulation test method, which is applied to a cell insulation test system, the system comprising a host computer, a control device and an insulation tester; the method comprising: the insulation tester responds to a received test start signal, tests the cell to be tested according to a preset test process, obtains a preliminary test result and sends it to the host computer; the host computer responds to the received preliminary test result, sends the preliminary test result and a test completion signal to the control device; and collects process data generated during the insulation test of the cell to be tested within a first time period, obtains a final test result based on the process data, and The test result is sent to the control device; the control device responds to the received preliminary test result and the test completion signal to release the battery cell to be tested from the test station of the insulation tester; the control device responds to the received battery cell verification signal to determine the target battery cell to be tested corresponding to the battery cell verification signal, and determines the battery cell flow direction of the target battery cell to be tested according to the target preliminary test result and the target final test result corresponding to the target battery cell to be tested; wherein, the first time period is less than the time period in which the control device receives the battery cell verification signal after releasing the target battery cell to be tested from the test station.

[0026] In some embodiments of the present disclosure, the process data includes at least one cell resistance value corresponding to at least one voltage value; the method further includes: the host computer is further used to determine that the i-th cell resistance value is abnormal data and generate a first final test result if it is determined that the i-th cell resistance value among the at least one cell resistance value is less than the i-1-th cell resistance value, and the difference between the i-th cell resistance value and the i-1-th cell resistance value minus the i-1-th cell resistance value is greater than the first value, and the i-th cell resistance value is less than the second value; the host computer is also used to If it is determined that there is no i-th cell resistance value less than the i-1-th cell resistance value among the at least one cell resistance value, and the difference between the i-th cell resistance value and the i-1-th cell resistance value minus the i-1-th cell resistance value is greater than the first value, and the i-th cell resistance value is less than the second value, then it is determined that there is no abnormal data in the at least one cell resistance value, and a second final test result is generated; the first final test result or the second final test result is sent to the control device; wherein, i is an integer greater than or equal to 1, and the second value is greater than the first value.

[0027] In some embodiments of the present disclosure, the method also includes: the host computer presents a test display interface, wherein the test display interface includes a test result display box; the host computer displays the preliminary test result in the test result display box in response to the received preliminary test result; when the host computer obtains the final test result based on the process data, the host computer displays the final test result in the test result display box; when the control device determines that the target battery cell to be tested corresponds to the battery cell verification signal, it searches for the target preliminary test result and the target final test result corresponding to the target battery cell to be tested, and displays the target preliminary test result and the target final test result in the test result display box.

[0028] In some embodiments of the present disclosure, the test display interface also includes a test parameter display box; the method also includes: the host computer obtains the test parameters of the insulation tester during the test of the battery cell to be tested according to the preset test process from the insulation tester, and displays the test parameters in the test parameter display box.

[0029] In some embodiments of the present disclosure, the test display interface further includes an insulation tester status display box; the method further includes: the host computer responds to the received working status of the insulation tester and displays the working status in the insulation tester status display box.

[0030] In some embodiments of the present disclosure, the test display interface also includes a warning interface; the method also includes: if the upper computer determines that the working state is not the standby state for a preset number of consecutive times, it generates a first alarm message, displays the first alarm message on the warning interface, and sends the first alarm message to the control device; the control device responds to the received first alarm message and stops the operation of the insulation tester.

[0031] In some embodiments of the present disclosure, if the host computer does not receive the working status returned by the insulation tester within a second time period after issuing a working status acquisition instruction to the insulation tester, a second alarm message is generated, the second alarm message is displayed on the early warning interface, and the second alarm message is sent to the control device; the control device responds to the received second alarm message and detects the communication connection between the host computer and the insulation tester.

[0032] In some embodiments of the present disclosure, if the control device determines that both the target preliminary test result and the target final test result indicate that the target battery cell to be tested has passed the test, the control device sends a test pass message to the host computer; the host computer responds to the received test pass message and displays the test pass message in the test result display box; if the control device determines that one of the target preliminary test result and the target final test result indicates that the target battery cell to be tested has failed the test, the control device sends a test fail message to the host computer; the host computer responds to the received test fail message and displays the test fail message in the test result display box.

[0033] In the present disclosure, when the host computer receives the preliminary test result of the battery cell to be tested sent by the insulation tester, it sends an instruction to the control device to release the battery cell to be tested, and then tests the next battery cell to be tested. At the same time, the host computer collects process data generated by the battery cell to be tested during the test from the insulation tester, and carefully analyzes whether any abnormal situation occurs in the battery cell to be tested during the test based on the process data, and obtains a final test result of the battery cell to be tested again and sends it to the control device; based on this, the control device only needs to determine the target battery cell to be tested targeted by the battery cell verification signal when receiving the battery cell verification signal, and then retrieve the target preliminary test result and target final test result of the target battery cell to be tested from its own storage area, and finally determine the battery cell flow direction of the target battery cell to be tested based on the target preliminary test result and target final test result; the battery cell insulation test method proposed in the present disclosure is an asynchronous test method, which saves the waiting time for logical analysis of the process data generated in the battery cell insulation test, ensures that the equipment continuously and stably reaches the fastest production speed, reduces the bottleneck of workstation speed-up, and thus can improve the test efficiency of the battery cell while ensuring the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0035] FIG1 is a schematic diagram of the composition of a battery cell insulation testing system provided by an embodiment of the present disclosure;

[0036] FIG2 is a schematic diagram showing the first composition of an exemplary battery cell insulation testing system provided in an embodiment of the present disclosure;

[0037] FIG3 is a broken line diagram of an exemplary process data provided by an embodiment of the present disclosure;

[0038] FIG4 is a second schematic diagram of the composition of an exemplary battery cell insulation testing system provided in an embodiment of the present disclosure;

[0039] FIG5 is a schematic diagram of a flow chart of a method for battery cell exiting a station according to an embodiment of the present disclosure;

[0040] FIG6 is a flow chart of an exemplary battery cell insulation testing method provided in an embodiment of the present disclosure;

[0041] FIG7 is a flow chart of an exemplary method for storing process data according to an embodiment of the present disclosure;

[0042] FIG8 is a schematic diagram of a flow chart of an exemplary control device controlling the operation of a battery cell to be tested provided by an embodiment of the present disclosure;

[0043] FIG9 is a first schematic diagram of an exemplary test display interface of a host computer provided in an embodiment of the present disclosure;

[0044] FIG10 is a second schematic diagram of an exemplary test display interface of a host computer provided in an embodiment of the present disclosure;

[0045] FIG11 is a third schematic diagram of an exemplary test display interface of a host computer provided in an embodiment of the present disclosure;

[0046] FIG12 is a schematic diagram of an exemplary warning interface provided by an embodiment of the present disclosure;

[0047] FIG13 is a fourth schematic diagram of a test display interface of an exemplary host computer provided in an embodiment of the present disclosure.

[0048] Description of Reference Numerals

[0049] 0-Battery cell insulation test system; 1-Upper computer; 2-Control device; 3-Insulation tester; 4-Photoelectric sensor; 5-Gripper device, 6-Test result display box; 7-Test parameter display box; 8-Insulation tester status display box; 9-Warning interface; 91-Alarm time display box; 92-Alarm interface name display box; 93-Error code display box; 94-Error cause display box; 95-Handling method display box; 96-Handling suggestion display box; 97-Handling person display box; 98-Upload handling suggestion display box; 10-Insulation tester debugging display box; 100 1-Insulation tester selection display box; 1002-Insulation tester port number display box; 1003-The upper limit display box of the resistance value of the battery cell to be tested; 1004-The lower limit display box of the resistance value of the battery cell to be tested; 1005-Insulation tester connection baud rate display box; 1006-Insulation tester data bit display box; 1007-Insulation voltage provided by the insulation tester display box; 1008-Insulation tester parity bit display box; 1009-Insulation tester trigger command display box; 1010-Insulation tester test time display box; 1011-Insulation tester connection status display box. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification of the present disclosure and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0052] In the description of the embodiments of the present disclosure, technical terms such as "first," "second," and "third" are used solely to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0053] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0054] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0055] In the description of the embodiments of the present disclosure, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present disclosure.

[0056] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0057] In the description of the embodiments of the present disclosure, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0058] Hereinafter, the present disclosure will be described in detail.

[0059] Battery cells are an important part of batteries. New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0060] At present, the application of new energy batteries in life and industry is becoming more and more extensive. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding. In the embodiment of the present disclosure, the battery can be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, which can be used to make a battery module or battery pack, thereby being used to supply power to electrical devices. The battery cell can be a secondary battery, which refers to a battery cell that can continue to be used by activating the active material by charging after the battery cell is discharged. The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiment of the present disclosure is not limited to this.

[0061] Batteries are obtained by testing cells through multiple processes. Currently, when cells are tested one by one, it is necessary to determine whether the test has passed after the test is completed before the cell can be released from the testing process. Due to the complex logic during the judgment, the judgment time is long, which will increase the time takt of this process and reduce the battery cell testing efficiency.

[0062] Based on the above problems, the present disclosure proposes a battery cell insulation test system 0. Referring to Figure 1, the battery cell insulation test system 0 includes a host computer 1, a control device 2 and an insulation tester 3; wherein: the insulation tester 3 is used to respond to the received test start signal, test the battery cell to be tested according to the preset test process, and send the preliminary test results to the host computer 1 after obtaining the preliminary test results; the host computer 1 is used to respond to the received preliminary test results, send the preliminary test results and the test completion signal to the control device 2; and collect the process data generated during the insulation test of the battery cell to be tested in the first time period, and The final test result is sent to the control device 2; the control device 2 is used to respond to the received preliminary test result and the test completion signal, and release the battery cell to be tested from the test station of the insulation tester 3; the control device 2 is also used to respond to the received battery cell verification signal, determine the target battery cell to be tested corresponding to the battery cell verification signal, and determine the battery cell flow direction of the target battery cell to be tested according to the target preliminary test result corresponding to the target battery cell to be tested, and the target final test result; wherein the first time period is less than the time period in which the control device 2 receives the battery cell verification signal after releasing the target battery cell to be tested from the test station.

[0063] It should be noted that in the embodiment of the present disclosure, the control device 2 is a device that can issue control instructions, such as a programmable logic controller (PLC); the specific control device 2 can be selected according to actual conditions, and the embodiment of the present disclosure does not make specific limitations here.

[0064] It should be noted that in the embodiment of the present disclosure, the insulation tester 3 is a device that can perform a test process on the battery cell to be tested. For example, the insulation tester 3 is an insulation resistance tester, which is used to perform an insulation withstand voltage test (High Potential Test, Hipot) on the battery cell to be tested; the specific insulation tester 3 can be selected according to actual conditions, and the embodiment of the present disclosure does not make specific limitations here.

[0065] Specifically, when the insulation tester 3 receives the test start signal, it tests the battery cell to be tested according to the preset test process, obtains the preliminary test result, and then sends the preliminary test result to the host computer 1. The reception of the preliminary test result by the host computer 1 indicates that the insulation tester 3 has completed the test of the battery cell to be tested. The host computer 1 then sends a test completion signal and the received preliminary test result to the control device 2. When the control device 2 receives the test completion signal and the preliminary test result, it releases the battery cell to be tested from the test station of the insulation tester 3. At this time, the next battery cell to be tested enters the test station for testing. After sending the test completion signal and the preliminary test result to the control device 2, the host computer 1 also needs to collect the process data generated by the battery cell to be tested during the test process from the insulation tester 3, and carefully analyze whether there are any abnormal conditions in the battery cell to be tested during the test process based on the process data, and obtain a final test result of the battery cell to be tested again and send it to the control device 2; end The battery cells to be tested will move from the test station to the transfer station through the production line. At this time, if a target battery cell to be tested moves to the transfer station, it will trigger the sending of a battery cell verification signal to the control device 2. After receiving the battery cell verification signal, the control device 2 determines the target battery cell to be tested corresponding to the battery cell verification signal. Since the target battery cell to be tested has been released from the test station, the upper computer 1 has sent the target preliminary test result of the target battery cell to be tested to the control device 2, and the upper computer 1 collects process data from the insulation tester 3 during the process of the target battery cell to be tested moving from the test station to the transfer position, and obtains the target final test result after analysis, which is also sent to the control device 2. Therefore, after determining the target battery cell to be tested corresponding to the battery cell verification signal, the control device 2 takes out the target preliminary test result and the target final test result of the target battery cell to be tested from its own storage area, and finally determines the battery cell flow direction of the target battery cell to be tested according to the target preliminary test result and the target final test result.

[0066] It is understandable that since the battery cells to be tested leave the test station after completing the test process in sequence, assuming that the upper computer 1 needs to carefully analyze whether there are any abnormal conditions in the test process of each battery cell to be tested based on the process data, and give the test results before releasing the battery cell to be tested and proceeding to the test process of the next battery cell to be tested, since the logic of the upper computer 1 during the analysis is relatively complex and the analysis time is long, the time beat of this test process will be increased, and the test efficiency of the battery cell will be reduced; based on this, the present disclosure sends an instruction to the control device 2 to release the battery cell to be tested, and then tests the next battery cell to be tested, and at the same time, the upper computer 1 collects the data of the battery cell to be tested during the test process from the insulation tester 3. The process data generated in the test is collected, and the process data is carefully analyzed to see if any abnormal situation occurs in the test cell during the test, and the final test result of the test cell is obtained again and sent to the control device 2; based on this, the control device 2 only needs to determine the target test cell targeted by the cell verification signal when receiving the cell verification signal, and then take out the target preliminary test result and the target final test result of the target test cell from its own storage area, and finally determine the cell flow direction of the target test cell according to the target preliminary test result and the target final test result; the cell insulation test method proposed in the present disclosure is an asynchronous test method, which saves the waiting time for logical analysis of the process data generated in the cell insulation test, and can improve the test efficiency of the cell while ensuring the reliability of the test results.

[0067] In some embodiments of the present disclosure, as shown in Figure 2, the battery cell insulation testing system 0 also includes a photoelectric sensor 4; wherein: the photoelectric sensor 4 is used to send a battery cell arrival signal to the control device 2 when it detects that the battery cell to be tested has arrived at the test station; the control device 2 is also used to respond to the received battery cell arrival signal and send a test trigger signal to the host computer 1; the host computer 1 is also used to respond to the received test trigger signal, determine the working status of the insulation tester 3, and send a test start signal to the insulation tester 3 when the working status is standby.

[0068] It should be noted that in the embodiment of the present disclosure, the photoelectric sensor 4 is a sensor at the test station on the production line, which is used to detect the battery cells to be tested that arrive at the test station; the specific photoelectric sensor 3 can be selected according to actual conditions, and the embodiment of the present disclosure does not make specific limitations here.

[0069] Specifically, when the photoelectric sensor 4 located at the test station on the production line detects that a battery cell to be tested has arrived at the test station, it sends a battery cell arrival signal to the control device 2 to inform the control device 2 that the battery cell to be tested has arrived at the test station. When the control device 2 receives the battery cell arrival signal, it sends a test trigger signal to the upper computer 1 and simultaneously informs the insulation tester 3 that the battery cell to be tested has arrived at the test station, so that the insulation tester 3 can press down the test probe to contact the test end of the battery to be tested. When the upper computer 1 receives the test trigger signal, it determines the working status of the insulation tester 3. If the working status is the standby status, it indicates that the insulation tester 3 can start the testing process and sends a test start signal to the insulation tester 3. When the insulation tester 3 receives the test start signal, it tests the battery cell to be tested according to the preset test process.

[0070] In some embodiments of the present disclosure, the host computer 1 is also used to send a working status acquisition instruction to the insulation tester 3; the insulation tester 3 is also used to respond to the received working status acquisition instruction, determine the working status, and send the working status to the host computer 1; wherein the working status includes at least a standby state, a test state, and an abnormal state.

[0071] Specifically, when the host computer 1 receives the test trigger signal sent by the control device 2, it sends a working status acquisition instruction to the insulation tester 3. After receiving the working status acquisition instruction, the insulation tester 3 determines its current working status and returns the working status to the host computer 1. After receiving the working status, if the working status is standby, the host computer 1 sends a test start signal to the insulation tester 3.

[0072] In some embodiments of the present disclosure, the host computer 1 is further used to send a working status acquisition instruction to the insulation tester 3 again after a preset time interval if the received working status is not the standby state, and to determine again whether the working status is the standby state; the host computer 1 is further used to send a first alarm message to the control device 2 if the working status is not the standby state for a preset number of consecutive times; the control device 2 is further used to stop the operation of the insulation tester 3 in response to the received first alarm message.

[0073] Specifically, after the host computer 1 receives the working status sent by the insulation tester 3, if the working status is not the standby state, for example, it is a test state or an abnormal state, the host computer 1 sends a working status acquisition instruction to the insulation tester 3 again after a preset time interval. If the acquired working status is still not the standby state, the host computer 1 sends a working status acquisition instruction to the insulation tester 3 again. If the working status of the insulation tester 3 is not the standby state for a preset number of consecutive times (for example, 3 times), the host computer 1 sends a first alarm message to the control device 2. When the control device 2 receives the first alarm message, it sends a stop operation instruction to the insulation tester 3. When the insulation tester 3 receives the stop operation instruction, it stops the operation of the insulation tester 3.

[0074] In some embodiments of the present disclosure, the host computer 1 is further used to send a second alarm message to the control device 2 if the working status returned by the insulation tester 3 is not received within a second time period after the working status acquisition instruction is issued; the control device 2 is also used to respond to the received second alarm message and detect the communication connection between the host computer 1 and the insulation tester 3.

[0075] Specifically, if the upper computer 1 does not receive the working status returned by the insulation tester 3 within the second time period after sending the working status acquisition instruction to the insulation tester 3, at this time, it indicates that there is a problem with the communication connection between the upper computer 1 and the insulation tester 3. The upper computer 1 sends a second alarm message to the control device 2. After receiving the second alarm message, the control device 2 detects the communication connection between the upper computer 1 and the insulation tester 3.

[0076] It is understandable that before each battery cell insulation test, the present disclosure obtains the current working status of the insulation tester 3, determines whether it is in the standby state, and then issues a test start instruction to it, thereby reducing the possibility of misdetection of the battery cell to be tested or damage to the insulation tester.

[0077] In some embodiments of the present disclosure, the host computer 1 is also used to send a process data acquisition instruction to the insulation tester 3; the insulation tester 3 is also used to respond to the received process data acquisition instruction, collect process data generated by the battery cell to be tested during the test process; and send the process data to the host computer 1; the process data includes the battery cell resistance value displayed by the battery cell to be tested during the test as the voltage applied by the insulation withstand voltage tester; the host computer 1 is also used to respond to the received process data, judge the process data according to preset judgment rules, obtain the final test result and send it to the control device 2.

[0078] Specifically, while the host computer 1 sends a test completion signal and preliminary test results to the control device 2, it sends a process data acquisition instruction to the insulation tester 3. After receiving the process data acquisition instruction, the insulation tester 3 collects the process data generated by the battery cell to be tested during the test process, packages it and sends it to the host computer 1. After receiving the process data, the host computer 1 performs logical analysis on the process data according to the preset judgment rules, obtains the final test result of the battery cell to be tested, and sends it to the control device 2.

[0079] For example, as shown in Figure 3, the horizontal axis represents the number of the cell resistance value collected for the cell to be tested, and the vertical axis represents the cell resistance value. Usually, the test time for the cell to be tested is 3 seconds, and 150 cell resistance values ​​will be collected during the 3-second test time. Not all of them are shown in the figure. During the test, the cell resistance values ​​are often linearly distributed. When an abnormal situation occurs, the line graph will mutate, thereby judging that the test of the cell to be tested is abnormal.

[0080] It should be noted that, in the embodiment of the present disclosure, after receiving the process data, the host computer 1 makes a judgment using the following formula (1):

[0081] In formula (1), R i Indicates the resistance value of the i-th cell in the process data, R i-1 It represents the resistance value of the i-1th cell in the process data. Only when the resistance value of the i-th cell meets the above three conditions compared with the resistance value of the i-1th cell, can it be determined that the resistance value of the i-th cell is abnormal. The upper computer 1 needs to judge the resistance value of each cell in the process data in turn to obtain the final test result.

[0082] It should be noted that, in the embodiment of the present disclosure, the premise for using the above formula (1) to judge abnormal data is that, during the test, the voltage provided by the insulation tester 3 gradually increases from zero volts to a preset voltage. Since the cell resistance value is a divisor of the voltage and current, during the test, the cell resistance value will increase linearly with the increase of voltage.

[0083] In some embodiments of the present disclosure, the host computer 1 is further used to respond to the received process data and search for the battery cell production file within the current time period; the current time period is the time period from the first time point to the second time point, and the current time period includes the time point when the test of the battery cell to be tested starts; the host computer 1 is further used to determine whether the battery cell production file is currently occupied by other processes if the search is successful, and if the battery cell production file is occupied, a new battery cell production file from the current time point to the second time point is created, and usage permissions are set for the new battery cell production file, and the battery cell code and process data of the battery cell to be tested are written into the new battery cell production file; the host computer 1 is further used to set usage permissions for the battery cell production file if the battery cell production file is not occupied, and the battery cell code and process data are written into the battery cell production file; wherein the usage permissions are that other processes are allowed to use the battery cell production file or the new battery cell production file only in read-only mode, and are not allowed to edit the battery cell production file or the new battery cell production file.

[0084] Specifically, after receiving the process data generated by the battery cell to be tested during the test sent by the insulation tester 3, the host computer 1 searches for the battery cell production file in the current time period. The host computer 1 will create a battery cell production file for each hour. For example, the host computer 1 creates a battery cell production file for the time period of 8:00-8:59 at 8:00, and then creates a battery cell production file for the time period of 9:00-9:59 at 9:00. By analogy, the host computer 1 creates a battery cell production file for each time period to store the production data of the battery cells in the current time period. When the battery cell production file of the current time period is found, it is determined whether the battery cell production file is occupied by other processes. If it is occupied, a new battery cell production file from the current time point to the second time point is created. For example, if the current time period is the time period from the first time point 9:00 to the second time point 9:59, That is, 9:00-9:59, the current time point is 9:30, at this time, the battery cell production file is the battery cell production file of 9:00-9:59, if the file is occupied, a new battery cell production file corresponding to the time period 9:30-9:59 from the current time point 9:30 to the second time point 9:59 is created; after the upper computer 1 creates the new battery cell production file, it occupies the new battery cell production file and sets usage permissions for the new battery cell production file, allowing other processes to use the new battery cell production file only in read-only mode, not allowing editing, and then writes the battery cell code and process data of the battery cell to be tested into the new battery cell production file; if the file is not occupied, it occupies the battery cell production file and sets usage permissions for the battery cell production file, allowing other processes to use the battery cell production file only in read-only mode, not allowing editing, and then writes the battery cell code and process data of the battery cell to be tested into the battery cell production file.

[0085] Specifically, if the upper computer 1 fails to find the battery cell production file for the current time period, it creates a new battery cell production file corresponding to the current time period, then occupies the battery cell production file, and sets usage permissions for the battery cell production file, allowing other processes to use the battery cell production file only in read-only mode, and not allowing editing, and then writes the battery cell code and process data of the battery cell to be tested into the battery cell production file.

[0086] It should be noted that in the embodiment of the present disclosure, the cell code is a unique identifier of the cell to be tested, which can be a label, barcode or QR code. Each cell to be tested has a unique cell code, and the information of each cell to be tested can be stored corresponding to its own cell code; the specific cell code can be determined according to actual conditions, and the embodiment of the present disclosure does not make any specific limitations here.

[0087] It should be noted that in the embodiment of the present disclosure, the cell code is obtained by scanning the battery cell to be tested through a scanning device, and the scanning device is a device that can scan labels, barcodes or QR codes, such as a scanning gun or a scanning machine; the specific scanning device can be determined according to actual conditions, and the embodiment of the present disclosure does not make specific limitations here.

[0088] It can be understood that the present disclosure binds the battery cell production file with the battery cell code, locks it to the specific battery cell to be tested through the battery cell code, and stores the collected process data in real time in the database during the data collection process, that is, each time process data is received, a process data is stored in the database, and stored persistently in the database. When the computer is powered off or an abnormality occurs due to other reasons, the process data in the database will not be lost, preventing the loss of process data of the battery cell to be tested due to abnormalities in the software or equipment before the file is written; and the battery cell production file is occupied by a process, allowing other processes to perform read-only operations, to ensure that the battery cell production file is not lost due to abnormal opening or cause equipment alarms.

[0089] In some embodiments of the present disclosure, as shown in Figure 4, the battery cell insulation testing system 0 also includes a clamping device 5; wherein: the control device 2 is also used to send a first instruction to the clamping device 5 if the target preliminary test result and the target final test result both indicate that the target battery cell to be tested has passed the test, and send a second instruction to the clamping device 5 if one of the target preliminary test result and the target final test result indicates that the target battery cell to be tested has failed the test; the clamping device 5 is used to respond to the received first instruction and transfer the target battery cell to the normal unloading pull belt so that the normal unloading pull belt can move the target battery cell to the next process; the clamping device 5 is used to respond to the received second instruction and transfer the target battery cell to the abnormal unloading pull belt so that the abnormal unloading pull belt can move the target battery cell to the defective battery cell placement site.

[0090] It should be noted that, in the embodiment of the present disclosure, the gripper device 5 may be a mechanical / electric gripper for moving the battery cell to be tested; the specific gripper device 5 may be determined according to actual conditions, and the embodiment of the present disclosure does not make any specific limitation here.

[0091] It should be noted that in the embodiment of the present disclosure, the bad battery cell placement site is a bad (No Good, NG) site, which is an area for storing bad batteries in the battery production process; the specific bad battery cell placement site can be determined according to actual conditions, and the embodiment of the present disclosure does not make any specific limitations here.

[0092] Specifically, after the target battery cell to be tested completes the test process, the control device 2 releases the target battery cell to be tested from the test station, and the target battery cell to be tested is moved from the test station to the transfer station through the production line. Since the target battery cell to be tested completes the test process at the test station, the upper computer 1 sends the target preliminary test result of the target battery cell to the control device 2, and collects the process data generated by the battery cell to be tested during the test process from the insulation tester 3, and carefully analyzes whether there are any abnormal conditions in the battery cell to be tested during the test process based on the process data, and obtains a final test result of the battery cell to be tested again and sends it to the control device 2 before the target battery cell to be tested is moved to the transfer station. When the target battery cell to be tested arrives at the transfer station, the sensor located at the transfer station detects the target battery cell to be tested and sends a battery cell verification signal for the target battery cell to be tested to the control device 2. After receiving the battery cell verification signal, the control device 2 determines the target battery cell to be tested targeted by the battery cell verification signal, and then retrieves it from its own storage area. Take out the target preliminary test result and the target final test result of the target battery cell to be tested. If the target preliminary test result and the target final test result both indicate that the target battery cell to be tested has passed the test, send a first instruction to the gripper device 5. When the gripper device 5 receives the first instruction, it transfers the target battery cell to be tested from the transfer station to the normal unloading pull belt, and the normal unloading pull belt moves the target battery cell to be tested to the entry position of the next process. If one of the target preliminary test result and the target final test result indicates that the target battery cell to be tested has not passed the test, send a first instruction to the gripper device 5. When the gripper device 5 receives the second instruction, it transfers the target battery cell to be tested from the transfer station to the abnormal unloading pull belt, and the abnormal unloading pull belt moves the target battery cell to the NG field. Based on this, it can be seen that the battery cell to be tested only needs to determine whether the test is completed at the test station, and then it can continue to move through the production line. Then, when it moves to the transfer station, it needs to determine whether it has passed the test process through the test results.

[0093] The embodiment of the present disclosure provides a battery cell insulation testing system 0, wherein: an insulation tester 3 is used to respond to a received test start signal, test the battery cell to be tested according to a preset test process, and send the preliminary test results to the host computer 1 after obtaining the preliminary test results; the host computer 1 is used to respond to the received preliminary test results, send the preliminary test results and the test completion signal to the control device 2; and collect process data generated during the insulation test of the battery cell to be tested within a first time period, obtain the final test results based on the process data, and send them to the control device 2; the control device 2 is used to respond to the received preliminary test results and the test completion signal, and release the battery cell to be tested from the test station of the insulation tester 3; the control device 2 is also used to respond to the received battery cell verification signal, determine the target battery cell to be tested corresponding to the battery cell verification signal, and determine the target battery cell to be tested according to the target preliminary test result and the target final test result corresponding to the target battery cell to be tested. Determine the cell flow direction of the target cell to be tested; wherein, the first time period is less than the time period of the control device 2 receiving the cell verification signal after releasing the target cell to be tested from the test station; using the above implementation scheme, the control device only needs to determine the target cell to be tested targeted by the cell verification signal when receiving the cell verification signal, and then take out the target preliminary test result and the target final test result of the target cell to be tested from its own storage area, and finally determine the cell flow direction of the target cell to be tested according to the target preliminary test result and the target final test result; the cell insulation test method proposed in the present disclosure is an asynchronous test method, which saves the waiting time for logical analysis of the process data generated in the cell insulation test, ensures that the equipment continuously and stably reaches the fastest production speed, reduces the bottleneck of the speed-up of the station, and thus can improve the test efficiency of the cell while ensuring the reliability of the test results.

[0094] In addition, an embodiment of the present disclosure also provides a battery production line, which includes a battery cell insulation testing system, production equipment and transfer equipment. The production equipment is used to produce battery cells to be tested, and the transfer equipment is used to take the battery cells to be tested out of the production equipment and place them in the battery cell insulation testing system, or, take the battery cells to be tested that have completed the process out of the battery cell insulation testing system and transfer them to the target workstation.

[0095] In the embodiment of the present disclosure, the production equipment is used to produce the battery cells to be tested. For example, the production equipment can be an assembly equipment that assembles the battery cells to be tested in a housing, or the production equipment can be a welding equipment that connects multiple battery cells to be tested in the housing. Depending on the process sequence, the production equipment has many possible forms.

[0096] In the embodiments of the present disclosure, the transfer equipment has many possible forms. For example, the transfer equipment is a conveyor belt, which has a simple structure and high transportation efficiency. For another example, the transfer equipment is an arm-type robot, which can perform more complex operations.

[0097] In the embodiment of the present disclosure, there are many possibilities for the target station. For example, the target station may be an assembly station for the battery cell to be tested. Specifically, the cover plate in the shell is not installed before the test, and the battery cell to be tested that has completed welding will be transferred by the transfer equipment to the target position for installation of the cover plate. For another example, the target station is a testing station, such as a vibration test, a high temperature test, etc. For another example, the target station is a recycling station. When the battery cell to be tested fails the test, the transfer equipment will transfer it to the recycling station.

[0098] Based on the above embodiment, in another embodiment of the present disclosure, a cell insulation testing method is provided, which is applied to a cell insulation testing system 0. Referring to FIG1 , the cell insulation testing system 0 includes a host computer 1, a control device 2, and an insulation tester 3. FIG5 is a flow chart of a cell insulation testing method provided in an embodiment of the present disclosure. The specific method includes the following steps S101 to S104:

[0099] Step S101: The insulation tester responds to the received test start signal, tests the battery cell to be tested according to the preset test process, and sends the obtained preliminary test results to the host computer.

[0100] Specifically, when the insulation tester 3 receives the test start signal, it indicates that the battery cell to be tested has arrived at the test station of the insulation tester 3. The insulation tester 3 can test the battery cell to be tested according to the preset test process, and send the preliminary test results to the host computer 1 after obtaining them.

[0101] For example, if the insulation tester 3 is a Hipot, that is, an insulation withstand voltage test is performed on the battery cell to be tested, and the preset test process is that the Hipot applies a DC voltage from zero voltage to the target voltage to the battery cell to be tested within a first preset time period, and then continues to apply a DC voltage of the target voltage to the battery cell to be tested within a second preset time period; the specific preset test process is determined according to the insulation tester 3, and the embodiment of the present disclosure does not make specific limitations here.

[0102] It should be noted that in the embodiment of the present disclosure, if the insulation tester 3 is a Hipot, the preliminary test results may include the test voltage, test time, and test resistance value of the battery cell to be tested during the test; the specific preliminary test results can be determined according to actual conditions, and the embodiment of the present disclosure does not make specific limitations here.

[0103] Step S102: The host computer responds to the received preliminary test results and sends the preliminary test results and a test completion signal to the control device; and collects process data generated during the insulation test of the battery cell to be tested within the first time period, obtains the final test results based on the process data, and sends them to the control device.

[0104] Specifically, after receiving the preliminary test results sent by the insulation tester 3, the upper computer 1 indicates that the insulation tester 3 has completed the test of the battery cell to be tested, and can send the preliminary test results and the test completion signal to the control device 2, so that the control device 2 can release the battery cell to be tested from the test station and proceed to the next test process of the battery cell to be tested; at the same time, the upper computer 1 also collects the process data generated by the battery cell to be tested during the test from the insulation tester 3 within the first time period, and carefully analyzes whether there are any abnormal situations in the battery cell to be tested during the test based on the process data, and obtains a final test result of the battery cell to be tested again and sends it to the control device 2.

[0105] It should be noted that in the embodiment of the present disclosure, if the insulation tester 3 is a Hipot, the test process of the battery cell to be tested usually lasts for 3 seconds, and the process data generally includes 150 test resistance values ​​of the battery cell to be tested during the test process, that is, the test resistance values ​​of the battery cell to be tested are collected 150 times within 3 seconds to generate process data.

[0106] Step S103: The control device releases the battery cell to be tested from the test station of the insulation tester in response to the received preliminary test result and the test completion signal.

[0107] Specifically, after receiving the preliminary test result and the test completion signal sent by the host computer 1 , the control device 2 determines that the test cell has completed the test, and then releases the test cell from the test station of the insulation tester.

[0108] It should be noted that, in the embodiment of the present disclosure, after being released from the test station, the battery cell to be tested will be moved to the transfer station in sequence along the production line, and the battery cell verification process will be carried out at the transfer station.

[0109] Step S104, the control device responds to the received cell verification signal, determines the target cell to be tested corresponding to the cell verification signal, and determines the cell flow direction of the target cell to be tested according to the target preliminary test result and the target final test result corresponding to the target cell to be tested; wherein, the first time period is less than the time period in which the control device receives the cell verification signal after releasing the target cell to be tested from the test station.

[0110] Specifically, the battery cells to be tested that have completed the test move from the test station to the transfer station in sequence through the production line. When the sensor at the transfer station detects that a target battery cell to be tested has arrived at the transfer station, the sensor sends a battery cell verification signal to the control device 2. After receiving the battery cell verification signal, the control device 2 determines the target battery cell to be tested corresponding to the battery cell verification signal. Since the target battery cell to be tested has been released from the test station, the upper computer 1 has sent the target preliminary test result of the target battery cell to be tested to the control device 2, and the upper computer 1 collects process data from the insulation tester 3 during the process of the target battery cell to be tested moving from the test station to the transfer position, and obtains the target final test result after analysis, which is also sent to the control device 2. Therefore, after determining the target battery cell to be tested corresponding to the battery cell verification signal, the control device 2 takes out the target preliminary test result and the target final test result of the target battery cell to be tested from its own storage area, and finally determines the battery cell flow direction of the target battery cell to be tested based on the target preliminary test result and the target final test result.

[0111] It should be noted that, in the embodiment of the present disclosure, the first time period is less than the time period in which the control device 2 receives the cell verification signal after releasing the target cell to be tested from the test station, indicating that after the control device 2 releases the target cell to be tested from the test station and before the target cell to be tested runs to the transfer station, the upper computer 1 has obtained the process data of the target cell to be tested from the insulation tester 3 and obtained the target final test result based on the process data. Based on this, the target cell to be tested only needs to determine whether the test is completed at the test station, and then continue to move through the production line. Then, when it moves to the transfer station, it needs to use two test results to determine whether it has passed the test process.

[0112] Based on the above embodiment, in an optional embodiment of the present disclosure, as shown in FIG6 , a flow chart of an exemplary battery cell insulation testing method is provided, where the PLC is the control device 2 and the Hipot is the insulation tester 3, specifically as shown in steps S201 to S222:

[0113] Step S201: The host computer is initialized, the connection between PLC and Hipot is successful, and the Hipot test process is started.

[0114] Step S202: The host computer waits for the PLC to send a test trigger signal.

[0115] Step S203: When the PLC detects that the battery cell to be tested arrives at the test station, the PLC sets the test trigger signal to true.

[0116] Specifically, the test trigger signal address is of bool type, true: trigger, false: not trigger; at the same time, the PLC also sends the cell code of the cell to be tested to the host computer 1 through the test trigger signal.

[0117] Step S204: The host computer receives the test trigger signal and reads the cell code of the cell to be tested.

[0118] Step S205: The host computer sends a working status acquisition instruction to Hipot.

[0119] Step S206: Hipot determines the working status and sends the working status to the host computer.

[0120] Step S207: Determine whether the working state is the standby state.

[0121] Specifically, if the working state is the standby state, the process goes to step S208. If the working state is not the standby state, the process goes to step S205 after a preset time interval, that is, the working state acquisition instruction is sent to Hipot again. If the standby state is not obtained for more than 3 times, an alarm message is sent to the PLC.

[0122] Step S208: Send a test start signal to Hipot.

[0123] Step S209 : Hipot tests the battery cell to be tested according to a preset test process.

[0124] Step S210: After the test is completed, Hipot obtains the preliminary test results and sends them to the host computer.

[0125] Step S211: The host computer analyzes the preliminary test results to obtain test data.

[0126] Specifically, the test data includes the test voltage, test time, and test resistance value of the battery cell to be tested.

[0127] Step S212: The host computer sends the test data and preliminary test results to the PLC.

[0128] Step S213: The PLC stores the cell code, test data, and preliminary test results in its own storage area.

[0129] Step S214: The host computer sends a test completion signal to the PLC.

[0130] Step S215: The PLC releases the battery cell to be tested from the test station.

[0131] Step S216: The host computer sends a process data acquisition instruction to Hipot.

[0132] Step S217: Hipot collects process data generated by the battery cell to be tested during the test process and sends it to the host computer.

[0133] Step S218: The host computer receives the process data, and judges the process data according to the preset judgment rules, obtains the final test result and sends it to the PLC.

[0134] Step S219 : The PLC receives the final test result, and in response to the cell verification signal, determines the cell flow direction of the cell to be tested according to the final test result and the preliminary test result.

[0135] Step S220: The host computer saves the cell code and process data into the cell production file.

[0136] Step S221: The host computer sets the test trigger signal to false.

[0137] Step S222: The PLC clears the stored test data corresponding to the battery cells to be tested and waits for the next group of battery cells to be tested to arrive.

[0138] Based on the above embodiment, in an optional embodiment of the present disclosure, as shown in FIG7 , a flowchart of an exemplary method for saving process data is provided, specifically as shown in steps S301 to S306:

[0139] Step S301: The host computer receives process data generated by the test cell during the test process from the insulation tester.

[0140] Step S302: Whether the host computer finds the cell production files within the current time period.

[0141] Specifically, if it is found, the process proceeds to step S303; if it is not found, the process proceeds to step S304.

[0142] Specifically, the host computer 1 will create a battery cell production file for each hour. For example, the host computer 1 creates a battery cell production file for the time period of 8:00-8:59 at 8:00, and then creates a battery cell production file for the time period of 9:00-9:59 at 9:00. And so on. The host computer 1 creates a battery cell production file for each time period to store the production data of the battery cells in the current time period.

[0143] Step S303: Determine whether the cell production file is currently occupied by other processes.

[0144] Specifically, if it is occupied, proceed to step S304; if it is not occupied, proceed to step S305.

[0145] Step S304: Create a new cell production file.

[0146] Specifically, if the battery cell production file within the current time period is not found, then the battery cell production file corresponding to the current time period is created; if the battery cell production file within the current time period is found but the battery cell production file is currently occupied by other processes, then a new battery cell production file (new battery cell production file) from the current time point to the second time point is created.

[0147] Step S305: occupy the battery cell production file and set usage permissions for the battery cell production file.

[0148] Specifically, other processes are allowed to use the cell production file in read-only mode and are not allowed to edit it.

[0149] Step S306: writing the cell code and process data of the cell to be tested into the cell production file.

[0150] Based on the above embodiment, in an optional embodiment of the present disclosure, as shown in FIG8 , a flow chart of an exemplary control device controlling the operation of a cell to be tested is provided, specifically as shown in steps S401 to S405:

[0151] Step S401: upon receiving a cell arrival signal, the control device controls the insulation tester to press down a test probe to contact a test terminal of the battery to be tested.

[0152] Step S402: The control device sends a test trigger signal to the host computer.

[0153] Step S403: The control device receives the test completion signal and preliminary test results sent by the host computer, and releases the battery cell to be tested from the test station of the insulation tester.

[0154] Step S404: After receiving the cell verification signal, the control device determines the target cell to be tested corresponding to the cell verification signal.

[0155] Step S405 : The control device determines the cell flow direction of the target cell to be tested according to the target preliminary test result and the target final test result.

[0156] In an optional embodiment of the present disclosure, the process data includes at least one cell resistance value corresponding to at least one voltage value; the method further includes: a host computer, further configured to determine that the i-th cell resistance value is abnormal data and generate a first final test result if it is determined that among the at least one cell resistance value, the i-th cell resistance value is less than the i-1-th cell resistance value, and the difference between the i-th cell resistance value and the i-1-th cell resistance value minus the i-1-th cell resistance value is greater than the first value, and the i-th cell resistance value is less than the second value; the host computer is further configured to determine that the i-th cell resistance value is abnormal data and generate a first final test result. If it is determined that there is no abnormal data in at least one cell resistance value, and if it is determined that there is no i-th cell resistance value less than the i-1-th cell resistance value in at least one cell resistance value, and the difference between the i-th cell resistance value and the i-1-th cell resistance value minus the i-1-th cell resistance value is greater than the first value, and the i-th cell resistance value is less than the second value, then it is determined that there is no abnormal data in at least one cell resistance value, and a second final test result is generated; the first final test result or the second final test result is sent to the control device; wherein i is an integer greater than or equal to 1, and the second value is greater than the first value.

[0157] It should be noted that, in the embodiment of the present disclosure, as shown in formula (1), R i Indicates the resistance value of the i-th cell in the process data, R i-1 Represents the i-1th cell resistance value in the process data. Only when the i-th cell resistance value meets the above three conditions compared with the i-1th cell resistance value can it be determined that the i-th cell resistance value is abnormal. The upper computer 1 needs to judge each cell resistance value in the process data in turn to obtain the final test result. If there is abnormal data in at least one cell resistance value, the first final test result is generated. If there is no abnormal data in at least one cell resistance value, the second final test result is generated.

[0158] In an optional embodiment of the present disclosure, the method also includes: the upper computer 1 presents a test display interface, wherein the test display interface includes a test result display box; the upper computer 1 responds to the received preliminary test result and displays the preliminary test result in the test result display box; when the upper computer 1 obtains the final test result based on the process data, the upper computer 1 displays the final test result in the test result display box; when the control device 2 determines the target battery cell to be tested corresponding to the battery cell verification signal, it searches for the target preliminary test result and the target final test result corresponding to the target battery cell to be tested, and displays the target preliminary test result and the target final test result in the test result display box.

[0159] It should be noted that in the embodiment of the present disclosure, the test display interface is a graphical user interface (GUI) of the host computer 1, which is used to display corresponding information; the specific test display interface can be determined according to actual conditions, and the embodiment of the present disclosure does not make any specific limitations here.

[0160] Exemplarily, as shown in FIG9 , the test display interface includes a test result display box 6 for displaying the preliminary test results obtained by the host computer 1 from the insulation tester 3 and the final test results obtained by the host computer 1 based on process data analysis.

[0161] In an optional embodiment of the present disclosure, the test display interface also includes a test parameter display box; the method also includes: the host computer 1 obtains the test parameters of the insulation tester 3 during the test of the battery cell to be tested according to a preset test process from the insulation tester 3, and displays the test parameters in the test parameter display box.

[0162] Exemplarily, as shown in Figure 10, the test display interface also includes a test parameter display box 7, which is used to display the test parameters of the insulation tester 3 during the test of the battery cell to be tested; assuming that the insulation tester 3 is a Hipot, the test parameters may include the test time, the voltage value applied by Hipot to the battery cell to be tested, and the battery cell resistance value expressed by the voltage to be tested based on the voltage value, etc.

[0163] In an optional embodiment of the present disclosure, the test display interface further includes an insulation tester status display box; the method further includes: the host computer 1 responds to the received working status of the insulation tester 3 and displays the working status in the insulation tester status display box.

[0164] Exemplarily, as shown in FIG11 , the test display interface further includes an insulation tester status display frame 8 for displaying the working status of the insulation tester 3 , which may include a standby state, a test state, an abnormal state, and the like.

[0165] In an optional embodiment of the present disclosure, the test display interface also includes a warning interface; the method also includes: if the upper computer 1 determines that the working state is not the standby state for a preset number of consecutive times, it generates a first alarm message, displays the first alarm message on the warning interface, and sends the first alarm message to the control device 2; the control device 2 responds to the received first alarm message and stops the operation of the insulation tester 3.

[0166] In an optional embodiment of the present disclosure, if the upper computer 1 does not receive the working status returned by the insulation tester 3 within a second time period after issuing a working status acquisition instruction to the insulation tester 3, a second alarm message is generated, the second alarm message is displayed on the early warning interface, and the second alarm message is sent to the control device 2; the control device 2 responds to the received second alarm message and detects the communication connection between the upper computer 1 and the insulation tester 3.

[0167] For example, as shown in FIG12 , the early warning interface 9 may include an alarm time display box 91, an alarm interface name display box 92, an error code display box 93, an error cause display box 94 (the reason for triggering the alarm), a processing method display box 95, a processing suggestion display box 96, a processing person display box 97, and an uploaded processing suggestion display box 98, etc., which are used to remind on-site employees of problems with the system so that they can handle them in a timely manner.

[0168] In an optional embodiment of the present disclosure, if the control device 2 determines that both the target preliminary test result and the target final test result indicate that the target battery cell to be tested has passed the test, the control device 2 sends a test pass information to the host computer 1; the host computer 1 responds to the received test pass information and displays the test pass information in the test result display box 6; if the control device 2 determines that one of the target preliminary test result and the target final test result indicates that the target battery cell to be tested has failed the test, the control device 2 sends a test fail information to the host computer 1; the host computer 1 responds to the received test fail information and displays the test fail information in the test result display box 6.

[0169] In some optional embodiments of the present disclosure, as shown in Figure 13, the test display interface may also include an insulation tester debugging display box 10, and the insulation tester debugging display box 10 includes: an insulation tester selection display box 1001; an insulation tester port number display box 1002; an upper limit display box 1003 of the resistance value of the battery cell to be tested; a lower limit display box 1004 of the resistance value of the battery cell to be tested; an insulation tester connection baud rate display box 1005; an insulation tester data bit number display box 1006; an insulation voltage display box 1007 provided by the insulation tester; an insulation tester parity bit display box 1008; an insulation tester trigger command display box 1009; an insulation tester test time display box 1010; and an insulation tester connection status display box 1011.

[0170] The embodiment of the present disclosure provides a battery cell insulation testing method, which is applied to a battery cell insulation testing system. The system includes a host computer, a control device and an insulation tester; the method includes: the insulation tester responds to a received test start signal, tests the battery cell to be tested according to a preset test process, and sends the preliminary test results to the host computer after obtaining the preliminary test results; the host computer responds to the received preliminary test results, sends the preliminary test results and a test completion signal to the control device; and collects process data generated during the insulation test of the battery cell to be tested within a first time period, obtains the final test results based on the process data, and sends them to the control device; the control device responds to the received preliminary test results and the test completion signal, and releases the battery cell to be tested from the test station of the insulation tester; the control device responds to the received battery cell verification signal, determines the target battery cell to be tested corresponding to the battery cell verification signal, and determines the target preliminary test results and the target final test results corresponding to the target battery cell to be tested according to the target preliminary test results and the target final test results. The test result determines the cell flow direction of the target cell to be tested; wherein, the first time period is less than the time period of the control device receiving the cell verification signal after releasing the target cell to be tested from the test station; with the above implementation scheme, the control device only needs to determine the target cell to be tested targeted by the cell verification signal when receiving the cell verification signal, and then take out the target preliminary test result and the target final test result of the target cell to be tested from its own storage area, and finally determine the cell flow direction of the target cell to be tested according to the target preliminary test result and the target final test result; the cell insulation test method proposed in the present disclosure is an asynchronous test method, which saves the waiting time for logical analysis of the process data generated in the cell insulation test, ensures that the equipment continuously and stably reaches the fastest production speed, reduces the bottleneck of the speed-up of the station, and thus can improve the test efficiency of the cell while ensuring the reliability of the test results.

[0171] An embodiment of the present disclosure also provides a computer-readable storage medium having a computer program stored thereon. The computer-readable storage medium stores one or more programs, which can be executed by one or more processors and applied to a battery cell insulation testing system. The computer program implements the battery cell insulation testing method as described above.

[0172] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure, and they should all be included in the scope of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the application documents.

Claims

1. A battery cell insulation test system, comprising a host computer, a control device, and an insulation tester; wherein: The insulation tester is used to respond to the received test start signal, test the battery cell to be tested according to the preset test process, and send the preliminary test results to the host computer after obtaining them; The host computer is configured to respond to the received preliminary test result by sending the preliminary test result and a test completion signal to the control device; and collecting process data generated during the insulation test of the battery cell to be tested within a first time period, obtaining a final test result based on the process data and sending it to the control device; The control device is configured to release the battery cell to be tested from the test station of the insulation tester in response to the received preliminary test result and the test completion signal; The control device is further configured to respond to a received cell verification signal, determine a target cell to be tested corresponding to the cell verification signal, and determine a cell flow direction of the target cell to be tested according to a target preliminary test result and a target final test result corresponding to the target cell to be tested; The first time period is shorter than a time period during which the control device receives the cell verification signal after releasing the target cell to be tested from the test station.

2. The system according to claim 1, wherein: The system further comprises a photoelectric sensor; wherein: The photoelectric sensor is configured to send a cell arrival signal to the control device when detecting that the cell to be tested has arrived at the test station; The control device is further configured to send a test trigger signal to the host computer in response to the received battery cell arrival signal; The host computer is further configured to respond to the received test trigger signal, determine the working state of the insulation tester, and send the test start signal to the insulation tester when the working state is a standby state.

3. The system according to claim 1 or 2, wherein: The host computer is further configured to send a working status acquisition instruction to the insulation tester; The insulation tester is further configured to respond to the received working status acquisition instruction, determine the working status, and send the working status to the host computer; The working state includes at least the standby state, the test state and the abnormal state.

4. The system according to claim 3, wherein: The host computer is further configured to, if the received working state is not the standby state, send the working state acquisition instruction to the insulation tester again after a preset time interval, and determine again whether the working state is the standby state; The host computer is further configured to send a first alarm message to the control device if it is determined that the working state is not the standby state for a preset number of consecutive times; The control device is further configured to stop the operation of the insulation tester in response to the received first alarm information.

5. The system according to claim 3 or 4, wherein: The host computer is further configured to send a second alarm message to the control device if the operating status returned by the insulation tester is not received within a second time period after the operating status acquisition instruction is issued; The control device is further configured to detect the communication connection between the host computer and the insulation tester in response to the received second alarm information.

6. The system according to any one of claims 1 to 5, wherein: The host computer is further configured to send a process data acquisition instruction to the insulation tester; The insulation tester is further configured to respond to the received process data acquisition instruction, collect the process data generated by the battery cell to be tested during the test process, and send the process data to the host computer; the process data includes the battery cell resistance value exhibited by the battery cell to be tested during the test process as the voltage applied by the insulation tester; The host computer is further configured to respond to the received process data, determine the process data according to a preset determination rule, obtain the final test result, and send it to the control device.

7. The system according to any one of claims 1 to 6, wherein: The host computer is further configured to respond to the received process data and search for a cell production file within a current time period; the current time period is a time period from a first time point to a second time point, and the current time period includes a time point when the test of the cell to be tested is started; The host computer is further configured to, if the search is successful, determine whether the battery cell production file is currently occupied by other processes; if the battery cell production file is occupied, create a new battery cell production file from the current time point to the second time point, set usage permissions for the new battery cell production file, and write the battery cell code of the battery cell to be tested and the process data into the new battery cell production file; The host computer is further configured to set the usage permission for the battery cell production file if the battery cell production file is not occupied, and write the battery cell code and the process data into the battery cell production file; The usage permission is that the other processes are allowed to use the battery cell production file or the new battery cell production file only in read-only mode, and are not allowed to edit the battery cell production file or the new battery cell production file.

8. The system according to any one of claims 1 to 7, wherein: The system further comprises a gripper device; wherein: The control device is further configured to send a first instruction to the gripper device if both the target preliminary test result and the target final test result indicate that the target battery cell to be tested has passed the test, and send a second instruction to the gripper device if one of the target preliminary test result and the target final test result indicates that the target battery cell to be tested has failed the test; The gripper device is configured to, in response to the received first instruction, transfer the target battery cell to be tested to a normal unloading belt, so that the normal unloading belt can move the target battery cell to be tested to the next process; The gripper device is used to respond to the received second instruction and transfer the target battery cell to the abnormal unloading belt so that the abnormal unloading belt can move the target battery cell to the defective battery cell delivery site.

9. A battery production line comprising: At least one battery cell insulation testing system according to any one of claims 1 to 8; Production equipment, used to produce the battery cells to be tested; The transfer equipment is used to take out the battery cell to be tested from the production equipment and place it in the battery cell insulation test system, or to take out the battery cell to be tested after the test is completed from the battery cell insulation test system and transfer it to a target workstation.

10. A battery cell insulation testing method, applied to a battery cell insulation testing system, the system comprising a host computer, a control device, and an insulation tester; the method comprising: The insulation tester responds to the received test start signal, tests the battery cell to be tested according to the preset test process, and sends the preliminary test results to the host computer after obtaining them; The host computer responds to the received preliminary test result by sending the preliminary test result and a test completion signal to the control device; and collecting process data generated during the insulation test of the battery cell to be tested within a first time period, obtaining a final test result based on the process data and sending it to the control device; The control device releases the battery cell to be tested from the test station of the insulation tester in response to the received preliminary test result and the test completion signal; The control device responds to the received cell verification signal, determines the target cell to be tested corresponding to the cell verification signal, and determines the cell flow direction of the target cell to be tested according to the target preliminary test result and the target final test result corresponding to the target cell to be tested; The first time period is shorter than a time period during which the control device receives the cell verification signal after releasing the target cell to be tested from the test station.

11. The method according to claim 10, wherein: The process data includes at least one cell resistance value corresponding to at least one voltage value; and the method further includes: The host computer is further configured to, if it is determined that among the at least one cell resistance value, the i-th cell resistance value is less than the i-1-th cell resistance value, and the difference between the i-th cell resistance value and the i-1-th cell resistance value minus the i-1-th cell resistance value is greater than a first value, and the i-th cell resistance value is less than a second value, determine that the i-th cell resistance value is abnormal data, and generate a first final test result; The host computer is further configured to determine that there is no abnormal data in the at least one cell resistance value, and generate a second final test result if it is determined that there is no i-th cell resistance value less than the i-1-th cell resistance value among the at least one cell resistance value, and the difference between the i-th cell resistance value and the i-1-th cell resistance value minus the i-1-th cell resistance value is greater than the first value, and the i-th cell resistance value is less than the second value; sending the first final test result or the second final test result to the control device; Here, i is an integer greater than or equal to 1, and the second value is greater than the first value.

12. The method according to claim 10 or 11, wherein: The method further comprises: The host computer presents a test display interface, wherein the test display interface includes a test result display box; The host computer responds to the received preliminary test result by displaying the preliminary test result in the test result display box; When the host computer obtains the final test result according to the process data, the host computer displays the final test result in the test result display box; The control device, when determining the target cell to be tested corresponding to the cell verification signal, searches for the target preliminary test result and the target final test result corresponding to the target cell to be tested, and converts the target preliminary test result and the target final test result into the target final test result. The target final test result is displayed in the test result display box.

13. The method according to claim 12, wherein: The test display interface also includes a test parameter display box; the method further includes: The host computer obtains test parameters from the insulation tester during a process in which the insulation tester tests the battery cell to be tested according to the preset test process, and displays the test parameters in the test parameter display box.

14. The method according to claim 12 or 13, wherein: The test display interface also includes an insulation tester status display box; the method further includes: The host computer responds to the received working status of the insulation tester by displaying the working status in the insulation tester status display box.

15. The method according to claim 14, wherein The test display interface also includes an early warning interface; the method further includes: If the host computer determines that the working state is not the standby state for a preset number of consecutive times, it generates a first alarm message, displays the first alarm message on the early warning interface, and sends the first alarm message to the control device; The control device stops the operation of the insulation tester in response to the received first alarm information.

16. The method according to claim 15, wherein The method further comprises: If the host computer does not receive the working status returned by the insulation tester within a second time period after issuing the working status acquisition instruction to the insulation tester, it generates a second alarm message, displays the second alarm message on the early warning interface, and sends the second alarm message to the control device; The control device detects the communication connection between the host computer and the insulation tester in response to the received second alarm information.

17. The method according to any one of claims 12 to 16, wherein: The method further comprises: If the control device determines that both the target preliminary test result and the target final test result indicate that the target cell to be tested has passed the test, the control device sends a test pass message to the host computer; The host computer responds to the received test pass information by displaying the test pass information in the test result display box; If the control device determines that one of the target preliminary test result and the target final test result indicates that the target cell to be tested has failed the test, the control device sends a test failure message to the host computer; The host computer responds to the received test failure information by displaying the test failure information in the test result display box.

18. The method according to any one of claims 10 to 17, wherein: The system further includes a photoelectric sensor, and the method further includes: When the photoelectric sensor detects that the battery cell to be tested has arrived at the test station, the photoelectric sensor sends a battery cell arrival signal to the control device; The control device sends a test trigger signal to the host computer in response to the received battery cell arrival signal; The host computer determines the working state of the insulation tester in response to the received test trigger signal, and sends the test start signal to the insulation tester when the working state is a standby state.

19. The method according to any one of claims 10 to 18, wherein: The method further comprises: The host computer sends a working status acquisition instruction to the insulation tester; The insulation tester responds to the received working status acquisition instruction, determines the working status, and sends the working status to the host computer; The working state includes at least the standby state, the test state and the abnormal state.

20. The method according to claim 19, wherein The method further comprises: If the working state received by the host computer is not the standby state, the host computer sends the working state acquisition instruction to the insulation tester again after a preset time interval, and determines again whether the working state is the standby state; If the host computer determines that the working state is not the standby state for a preset number of consecutive times, the host computer sends a first alarm message to the control device; The control device stops the operation of the insulation tester in response to the received first alarm information.

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