Battery pack in-sampling front-end test method, system, electronic device and storage medium

Abstract

The application relates to a battery pack in-sampling front end test method and system, electronic equipment and a storage medium. The method comprises the following steps: determining a current test mode according to the access condition of a test object, wherein the test object at least comprises a battery pack in-sampling board and an integrated sampling front end; supplying power to the test object corresponding to the current test mode according to the current test mode; after the power supply is completed, executing a preset test case on the test object to test, and outputting a test result. The battery pack in-sampling front end test method can realize a multi-dimensional, multi-level and more comprehensive test scheme for the C2P scheme battery pack integrated in-sampling front end.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, and in particular to sampling front-end testing methods, systems, electronic devices and storage media within battery packs. Background Technology

[0002] Currently, flying cars are primarily powered by battery systems, and the core component of these systems is the Battery Management System (BMS). To ensure the reliability of the battery sampling board in the BMS, relevant tests must be performed on it before the battery system is installed.

[0003] Among related technologies, the sampling front-end testing tooling solution within the battery pack includes the C2P (Cell To Pack) solution, which integrates the CCS (Cells Contact System) and the sampling board together.

[0004] For battery packs using a C2P (Consumer-to-Pack) approach, the integration of the FPC (Flexible Printed Circuit) and the sampling board in the sampling front-end requires secondary heating of the sampling board to ensure a reliable connection between the FPC and the sampling board during solder curing. However, when testing with a C2P approach, the sampling board is only visually inspected and sampled on the CCS (Computer-to-Synthetic Circuit) production line and the battery integration production line. This cannot guarantee the reliability of the sampling board after secondary heating during the FPC soldering process. If problems are discovered after the battery pack integration and assembly are completed, it can easily lead to scrapping, wasting materials and production line capacity, and it is difficult to trace the root cause of the problem. Summary of the Invention

[0005] To address or partially address the problems existing in related technologies, this application provides a method, system, electronic device, and storage medium for testing the sampling front-end within a battery pack. This method can detect problems in advance, prevent the sampling front-end from being scrapped, avoid wasting materials and production line capacity, and accurately locate the root cause of the problem.

[0006] The first aspect of this application provides a method for testing the sampling front-end within a battery pack, including:

[0007] The current test mode is determined based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end;

[0008] Power is supplied to the test object corresponding to the current test mode according to the current test mode, and after the power supply is completed, preset test cases are executed on the test object for testing;

[0009] Output the test results.

[0010] Preferably, determining the current test mode based on the access status of the test object includes:

[0011] Based on the sampling board connection to the sampling board fixture, the current test mode is determined to be the sampling board detection mode for the sampling board of the battery pack; or,

[0012] Based on the integrated sampling front-end access sampling front-end tooling, the current test mode is determined to be the sampling front-end detection mode for the sampling front-end of the battery pack.

[0013] Preferably, the step of supplying power to the test object corresponding to the current test mode according to the current test mode, and then executing preset test cases on the test object after power supply is completed, includes:

[0014] When the current test mode is the sampling board detection mode for the sampling board of the battery pack, switch the operating mode to the sampling board detection mode; according to the switched sampling board detection mode, power supply is provided to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after power supply is completed, the sampling board is tested using preset test cases; or,

[0015] When the current test mode is the sampling front-end detection mode for the sampling front-end of the battery pack, the running mode is switched to the sampling front-end detection mode; according to the switched sampling front-end detection mode, power is supplied to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode; after power supply is completed, preset test cases are executed to test the sampling front-end.

[0016] Preferably, the step of supplying power to the test object corresponding to the current test mode according to the current test mode, and then executing preset test cases on the test object after power supply is completed, includes:

[0017] When the current test mode is the sampling board detection mode for the sampling board of the battery pack, the first power module provides initial power to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after power supply is completed, the first test execution module executes preset test cases on the sampling board to perform the first test; or,

[0018] When the current test mode is the sampling front-end detection mode for the sampling front-end of the battery pack, the second power supply module provides a second power supply to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode; after the power supply is completed, the second test execution module executes preset test cases to perform a second test on the sampling front-end.

[0019] Preferably, the output test results include:

[0020] If the difference between the detected value of the preset parameter and the target value of the corresponding parameter in the preset test case is within the preset error range, the test result indicating that the test has passed will be output.

[0021] A second aspect of this application provides a sampling front-end testing system for an in-pack battery, comprising:

[0022] The mode determination module is used to determine the current test mode based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end;

[0023] A power supply module is used to supply power to the test object corresponding to the current test mode according to the current test mode;

[0024] The test execution module is used to perform preset test cases on the test object after the power module has completed power supply; and output the test results.

[0025] Preferably, the system further includes a sampling plate fixture and a sampling front-end fixture; the mode determination module includes:

[0026] The first mode determination module is used to determine, based on the sampling board fixture connected to the sampling board, the current test mode as the sampling board detection mode for the sampling board of the battery pack; or,

[0027] The second mode determination module determines the current test mode as the sampling front-end detection mode for the sampling front-end of the battery pack based on the integrated sampling front-end access sampling front-end tooling.

[0028] Preferably, the system further includes a switching module;

[0029] The switching module is used to switch the operating mode to the sampling board detection mode for the battery pack when the current test mode is the sampling board detection mode; the power module supplies power to the sampling board and sampling board fixture corresponding to the switched sampling board detection mode; the test execution module executes preset test cases on the sampling board to test it after the power module completes power supply; or,

[0030] The switching module is used to switch the operating mode to the sampling front-end detection mode for the battery pack when the current test mode is the sampling front-end detection mode; the power module supplies power to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode according to the switched sampling front-end detection mode; the test execution module performs preset test cases to test the sampling front-end after the power module completes the power supply.

[0031] Preferably, the power supply module includes a first power supply module and a second power supply module, and the test execution module includes a first test execution module and a second test execution module;

[0032] The first power module is used to provide a first power supply to the sampling board and sampling board fixture corresponding to the sampling board detection mode when the current test mode is the sampling board detection mode for the sampling board of the battery pack.

[0033] The first test execution module is used to perform a first test on the sampling board by executing preset test cases after the first power module has completed power supply; or...

[0034] The second power module is used to provide a second power supply to the sampling front end and sampling front end tooling corresponding to the sampling front end detection mode when the current test mode is the sampling front end detection mode for the sampling front end of the battery pack.

[0035] The second test execution module is used to perform a second test on the sampling front end by executing preset test cases after the second power module has completed power supply.

[0036] A third aspect of this application provides an electronic device, comprising:

[0037] Processor; and

[0038] A memory that stores executable code, which, when executed by the processor, causes the processor to perform the method described above.

[0039] A fourth aspect of this application provides a computer-readable storage medium having executable code stored thereon, which, when executed by a processor of an electronic device, causes the processor to perform the method described above.

[0040] The technical solution provided in this application may include the following beneficial effects:

[0041] This application provides a method for testing a sampling front-end within a battery pack. The method includes determining the current test mode based on the access status of the test object, wherein the test object includes at least a sampling board within the battery pack and an integrated sampling front-end. Power is supplied to the test object corresponding to the current test mode. After power supply is completed, preset test cases are executed on the test object to perform testing, and test results are output. Through the above processing, this application can perform corresponding tests on the test object, detect problems in advance, and clarify the state of the sampling board before and after secondary processing of the sampling board in the C2P solution battery pack production line. This avoids the waste of materials and production line capacity due to abnormal quality of various components of the sampling front-end before welding, which would lead to the scrapping of the entire sampling front-end after welding. Simultaneously, it can be used for offline testing of the sampling front-end, ensuring the normal function of the sampling front-end before integration into the C2P solution battery pack.

[0042] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0043] The above and other objects, features and advantages of this application will become more apparent from the following description of exemplary embodiments of this application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of this application.

[0044] Figure 1 This is a schematic flowchart illustrating the battery pack sampling front-end testing method according to an embodiment of this application;

[0045] Figure 2 This is another schematic flowchart illustrating the battery pack sampling front-end testing method in the embodiments of this application;

[0046] Figure 3 This is another schematic flowchart illustrating the battery pack sampling front-end testing method in the embodiments of this application;

[0047] Figure 4 This is a schematic diagram of the structure of the battery pack sampling front-end testing system shown in the embodiments of this application;

[0048] Figure 5 This is another structural schematic diagram of the battery pack sampling front-end testing system shown in the embodiments of this application;

[0049] Figure 6 This is another structural schematic diagram of the battery pack sampling front-end testing system shown in the embodiments of this application;

[0050] Figure 7 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this application. Detailed Implementation

[0051] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0052] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0053] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] In related technologies, for battery packs using the C2P scheme, when testing with the C2P scheme, the sampling boards are only visually inspected and sampled on the CCS production line and the battery integration production line. This cannot guarantee the reliability of the sampling boards after secondary heating during the FPC welding process. If problems are found after the battery pack integration and assembly is completed, it is easy to scrap the equipment, waste materials and production line capacity, and it is difficult to trace the root cause of the problem.

[0055] To address the aforementioned issues, this application provides a method for testing the sampling front-end within a battery pack. This method can detect problems in advance, prevent the sampling front-end from being scrapped, avoid wasting materials and production line capacity, and accurately pinpoint the root cause of the problem.

[0056] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0057] Figure 1 This is a schematic flowchart illustrating a sampling front-end testing method within a battery pack, as shown in an embodiment of this application.

[0058] See Figure 1 The method includes:

[0059] Step 110: Determine the current test mode based on the access status of the test objects, wherein the test objects include at least the sampling board inside the battery pack and the integrated sampling front end.

[0060] At the battery system level of flying cars, a series of promising new trends are emerging. The C2P approach directly integrates battery cells into the battery pack, eliminating the need for separate modules. This concept allows for full utilization of space, enabling C2P batteries to offer higher specific energy and driving range. For battery packs using the C2P approach, the integration of the FPC and sampling board in the sampling front end requires secondary heating of the sampling board, and it is necessary to ensure a reliable connection between the FPC and the sampling board during solder curing.

[0061] In this embodiment, the test objects include the sampling board before welding and the sampling front end integrated after welding in the battery pack of the C2P scheme. It can be determined whether the connected test object is the sampling board of the battery pack or the sampling front end based on the connection situation of the test object, so as to further determine the current test mode corresponding to the test object.

[0062] Specifically, the current test mode can be determined as the sampling board detection mode for the sampling board of the battery pack by connecting the sampling board to the sampling board fixture; or, the current test mode can be determined as the sampling front-end detection mode for the sampling front-end of the battery pack by connecting the integrated sampling front-end to the sampling front-end fixture.

[0063] Step 120: Power the test object corresponding to the current test mode according to the current test mode, and execute the preset test cases to test the test object after powering on.

[0064] According to the current test mode, power is supplied to the test object corresponding to the current test mode. If the test object is the sampling board of the battery pack, power is supplied to the sampling board; if the test object is the sampling front end of the battery pack, power is supplied to the sampling front end.

[0065] The test object can be powered by a simulated power supply. This simulated power supply can mimic the voltage of cells in the same series as a real battery pack. The simulated power supply can include an isolated regulated power supply (cell simulator), a resistive load board, and 18650 lithium batteries (or other batteries). An isolated regulated power supply is a power system whose core characteristic is electrical isolation between its input and output terminals to ensure safety and stability. A resistive load board is a device used to simulate actual loads; it is composed of resistive elements and can simulate resistive, inductive, and capacitive loads to meet different testing needs.

[0066] In this embodiment, when the current test mode is sampling board detection mode, the operating mode can be switched to sampling board detection mode for battery packs; power is supplied to the sampling board and sampling board fixture corresponding to the switched sampling board detection mode; after power supply is completed, preset test cases are executed to test the sampling board; or, when the current test mode is sampling front-end detection mode for battery packs, the operating mode can be switched to sampling front-end detection mode; power is supplied to the sampling front-end and sampling front-end fixture corresponding to the switched sampling front-end detection mode; after power supply is completed, preset test cases are executed to test the sampling front-end.

[0067] In this embodiment, when the current test mode is a sampling board detection mode for a battery pack sampling board, a first power supply module is used to provide a first power supply to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after the power supply is completed, a first test execution module is used to perform a first test on the sampling board by executing preset test cases; or, when the current test mode is a sampling front-end detection mode for a battery pack sampling front-end, a second power supply module is used to provide a second power supply to the sampling front-end and sampling front-end fixture corresponding to the sampling front-end detection mode; after the power supply is completed, a second test execution module is used to perform a second test on the sampling front-end by executing preset test cases.

[0068] After power is supplied, preset test cases can be executed on the test object. Different preset test cases can be edited in advance for different test objects. Most of the test items in the preset test cases are the same. However, since the sampling front end integrates more components than the sampling board, the preset test cases for the sampling front end will include more insulation withstand voltage tests, impedance tests, etc.

[0069] Step 130: Output the test results.

[0070] Once the test is complete, the test results for the test object can be output. For example, if the difference between the detected value of the preset parameter and the target value of the corresponding parameter in the preset test case is within the preset error range, the test result is output as passed.

[0071] This application can achieve a multi-dimensional, multi-level, and more comprehensive testing solution for the integrated sampling front-end (including sampling board, CCS, barcode, bracket, and other components) within the C2P battery pack by designing reserved and optimized test fixtures.

[0072] This application provides a method for testing a sampling front-end within a battery pack. The method includes determining the current test mode based on the access status of the test object, wherein the test object includes at least a sampling board within the battery pack and an integrated sampling front-end. Power is supplied to the test object corresponding to the current test mode. After power supply is completed, preset test cases are executed on the test object to perform testing, and test results are output. Through the above processing, this application can perform corresponding tests on the test object, detect problems in advance, and clarify the state of the sampling board before and after secondary processing of the sampling board in the C2P solution battery pack production line. This avoids the waste of materials and production line capacity due to abnormal quality of various components of the sampling front-end before welding, which would lead to the scrapping of the entire sampling front-end after welding. Simultaneously, it can be used for offline testing of the sampling front-end, ensuring the normal function of the sampling front-end before integration into the C2P solution battery pack.

[0073] Figure 2This is another flowchart illustrating a battery pack sampling front-end testing method according to an embodiment of this application. In this embodiment, different modes are switched to test the sampling board and sampling front-end within the battery pack.

[0074] See Figure 2 The method includes:

[0075] Step 210: Determine the current test mode based on the access status of the test objects, wherein the test objects include at least the sampling board inside the battery pack and the integrated sampling front end.

[0076] Step 210 is similar to step 110, and can be referred to the description of step 110, so it will not be repeated here.

[0077] In an optional embodiment of this application, step 210 includes:

[0078] Based on the sampling board connection to the sampling board fixture, the current test mode is determined to be the sampling board detection mode for the battery pack sampling board; or,

[0079] Based on the integrated sampling front-end access sampling front-end tooling, the current test mode is determined to be the sampling front-end detection mode for the battery pack sampling front-end.

[0080] The test objects include the sampling board before welding and the sampling front end integrated after welding in the battery pack of the C2P solution. During the test, if the sampling board is connected to the sampling board fixture, it can be determined that the current test mode is the sampling board detection mode for the sampling board of the battery pack; if the sampling front end is connected to the sampling front end fixture, it can be determined that the current test mode is the sampling front end detection mode for the sampling front end of the battery pack.

[0081] The sampling board fixture is used to place and connect the sampling board to be tested. The sampling board to be tested is typically a completed sampling board ready for the C2P battery pack integration and welding process. The sampling board is an important component of the battery management system, mainly used to collect key parameters such as voltage and temperature of each battery cell in the battery pack for monitoring and management.

[0082] The sampling front-end fixture is used to place and connect the sampling front-end to be tested. The sampling front-end to be tested is typically a pre-fabricated front-end ready for C2P battery pack integration and soldering. The sampling front-end is a component in the BMS (Battery Management System) responsible for converting the voltage, current, and temperature signals of individual battery cells into signals suitable for processing by the BMS main control unit. It typically includes an analog front-end (AFE, Active Front End) circuit for acquiring and initially processing analog signals.

[0083] The sampling board fixture and the sampling front-end fixture need to be fully matched with the structural design of the sampling board sample and the sampling front-end to facilitate the rapid introduction or disconnection of voltage signals to switch samples via probes.

[0084] Step 220: When the current test mode is the sampling board detection mode, switch the running mode to the sampling board detection mode for the battery pack sampling board; according to the switched sampling board detection mode, power supply is supplied to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after power supply is completed, the preset test cases are executed to test the sampling board.

[0085] If the current test mode is the sampling board detection mode for the battery pack sampling board, then the battery pack material arrival and detection stage will begin. The operating mode can be switched to the sampling board detection mode by setting the switch to the "sampling board position". After switching to the sampling board detection mode, power can be supplied to the control board and analog power supply in the test system. The analog power supply will then supply power to the sampling board and sampling board fixture. After power supply is completed, the host computer in the test system can run the preset test cases corresponding to the sampling board. The control board runs the test software and executes the preset operations in the preset test cases, such as reading the sampled values ​​of parameters such as voltage and temperature, and injecting short-circuit faults and open-circuit faults to test the battery pack sampling board.

[0086] Step 230: When the current test mode is the sampling front-end detection mode, switch the running mode to the sampling front-end detection mode for the battery pack; according to the switched sampling front-end detection mode, power supply is provided to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode; after power supply is completed, the preset test cases are executed to test the sampling front-end.

[0087] If the current test mode is the sampling front-end detection mode for the battery pack sampling front-end, then the stage after the battery pack sampling front-end welding and integration is entered. The operating mode can be switched to the sampling front-end detection mode by setting the switch to the "sampling board position". After switching to the sampling front-end detection mode, the control board and analog power supply in the test system can be powered. The analog power supply further powers the sampling front-end and sampling front-end tooling. After power supply is completed, the host computer in the test system can run the preset test cases corresponding to the sampling board. The control board runs the test software and executes the preset operations in the preset test cases, such as reading the sampled values ​​of parameters such as voltage sampling values ​​and temperature sampling values, injecting short circuit faults, injecting open circuit faults, etc. Insulation withstand voltage test, impedance test, etc. can also be performed to test the battery pack sampling front-end.

[0088] Most of the test items in the preset test cases for different test objects are the same. However, because the sampling front end of the battery pack integrates more components than the sampling board, the preset test cases for the sampling front end will include more insulation withstand voltage tests, impedance tests, etc.

[0089] Testing the sampling front end can be used after the sampling board is soldered and integrated into the sampling front end to ensure that the soldered and integrated sampling front end is in normal condition. In addition, before soldering, the FPC, bracket, nickel sheet, bar sheet and other components in the sampling front end can be tested in advance, and the soldering and integration can be carried out when the condition of each component is normal.

[0090] It should be noted that there is no sequential relationship between steps 220 and 230.

[0091] Step 240: If the difference between the detected value of the preset parameter and the target value of the corresponding parameter in the preset test case is within the preset error range, output the test result indicating that the test has passed.

[0092] The preset test cases can specify target values ​​and preset error ranges for preset parameters such as voltage and temperature. By testing the test object, the detected values ​​of each preset parameter can be obtained. The difference between the detected value of each preset parameter and its corresponding target value is calculated. If the difference is within the preset error range, the test object is determined to have passed the test, and the test result is output. For the test results of the sampling board and sampling front end in the battery pack, it is determined whether each parameter in the test results has passed the test. If all have passed the test, the host computer outputs a test report, and the sampling board material and sampling front end material enter the next production process. If either of them fails the test, the material that fails the test will be removed from the production process and handed over to upstream troubleshooting.

[0093] In this embodiment, the sampling board fixture and the sampling front end fixture can be integrated into the same device. This device can run the sampling board detection mode and the sampling front end detection mode. By switching between different modes, the sampling board and the sampling front end in the battery pack can be detected respectively.

[0094] This application provides a sampling front-end testing method for battery packs. It can switch between different modes to test different test objects according to the access situation of the test object, which can detect problems in advance and clarify the state of the sampling board before and after secondary processing of the sampling board in the C2P solution battery pack production line. This avoids the waste of materials and production line capacity due to the abnormal quality of each component of the sampling front-end before the integration and welding of the sampling front-end, which would lead to the scrapping of the entire sampling front-end after welding. At the same time, it can be used for the offline testing of the sampling front-end to ensure that the sampling front-end functions normally before the integration of the C2P solution battery pack.

[0095] Figure 3This is another schematic flowchart illustrating a sampling front-end testing method within a battery pack, as shown in an embodiment of this application.

[0096] In this embodiment of the application, the sampling board detection mode and the sampling front end detection mode are run in different devices to detect the sampling board and the sampling front end in the battery pack respectively.

[0097] See Figure 3 The method includes:

[0098] Step 310: Determine the current test mode based on the access status of the test objects, wherein the test objects include at least the sampling board inside the battery pack and the integrated sampling front end;

[0099] In an optional embodiment of this application, step 310 includes:

[0100] Based on the sampling board connection to the sampling board fixture, the current test mode is determined to be the sampling board detection mode for the battery pack sampling board; or,

[0101] Based on the integrated sampling front-end access sampling front-end tooling, the current test mode is determined to be the sampling front-end detection mode for the battery pack sampling front-end.

[0102] Step 310 is similar to step 210, and you can refer to the description of step 210.

[0103] Step 320: When the current test mode is the sampling board detection mode for the sampling board of the battery pack, the first power supply module provides the first power to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after the power supply is completed, the first test execution module executes the preset test cases to perform the first test on the sampling board.

[0104] In this embodiment, the sampling board fixture and the sampling front end fixture can be installed in two different devices, and the sampling board detection mode and the sampling front end detection mode can be run in the different devices to detect the sampling board and the sampling front end in the battery pack respectively.

[0105] If the current test mode is the sampling board detection mode for the battery pack sampling board, then the battery pack arrival and testing stage begins. The first power supply module (an analog power supply module) provides initial power to the sampling board and sampling board fixture corresponding to the sampling board detection mode. After the first power supply module completes power supply, the host computer in the test system runs the preset test cases corresponding to the sampling board, controls the board to run the test software, and executes preset operations in the preset test cases. These operations include reading sampled values ​​of parameters such as voltage and temperature, and injecting short-circuit or open-circuit faults to perform the first test on the battery pack sampling board.

[0106] Step 330: When the current test mode is the sampling front-end detection mode for the sampling front-end of the battery pack, the second power supply module provides a second power supply to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode; after the power supply is completed, the second test execution module executes preset test cases to perform a second test on the sampling front-end.

[0107] If the current test mode is the sampling front-end detection mode for the battery pack sampling front-end, then the stage after the battery pack sampling front-end welding and integration begins. A second power supply module (an analog power supply module) can then provide a second power supply to the sampling front-end and sampling front-end fixture corresponding to the sampling front-end detection mode. After the second power supply module completes power supply, the host computer in the test system can run the preset test cases corresponding to the sampling board. The control board runs the test software and executes the preset operations in the preset test cases, such as reading the sampled values ​​of parameters like voltage and temperature, injecting short-circuit faults, injecting open-circuit faults, and performing insulation withstand voltage tests and impedance tests to conduct a second test on the battery pack sampling front-end.

[0108] Most of the test items in the first and second tests are the same. However, because the sampling front end of the battery pack integrates more components than the sampling board, the second test for the sampling front end will include more insulation withstand voltage tests, impedance tests, etc.

[0109] Testing the sampling front end can be used after the sampling board is soldered and integrated into the sampling front end to ensure that the soldered and integrated sampling front end is in normal condition. In addition, before soldering, the FPC, bracket, nickel sheet, bar sheet and other components in the sampling front end can be tested in advance, and the soldering and integration can be carried out when the condition of each component is normal.

[0110] It should be noted that there is no sequential relationship between steps 320 and 330.

[0111] Step 340: If the difference between the detected value of the preset parameter and the target value of the corresponding parameter in the preset test case is within the preset error range, output the test result indicating that the test has passed.

[0112] The preset test cases can specify target values ​​and preset error ranges for preset parameters such as voltage and temperature. By testing the test object, the detected values ​​of each preset parameter can be obtained. The difference between the detected value of each preset parameter and its corresponding target value is calculated. If the difference is within the preset error range, the test object is determined to have passed the test, and the test result is output. For the test results of the sampling board and sampling front end in the battery pack, it is determined whether each parameter in the test results has passed the test. If all have passed the test, the host computer outputs a test report, and the sampling board material and sampling front end material enter the next production process. If either of them fails the test, the material that fails the test will be removed from the production process and handed over to upstream troubleshooting.

[0113] This application provides a sampling front-end testing method for battery packs. It can use different devices to test different test objects based on their access conditions, enabling early detection of problems. It clarifies the state of the sampling board before and after secondary processing on the sampling front-end production line of the C2P battery pack, preventing the entire sampling front-end from being scrapped after welding due to abnormal quality of components before integration and welding, thus avoiding waste of materials and production line capacity. Simultaneously, it can be used for offline testing of the sampling front-end, ensuring the normal functioning of the sampling front-end before integration into the C2P battery pack.

[0114] Corresponding to the foregoing method embodiments, this application also provides a battery pack in-sampling front-end testing system, electronic device, and corresponding embodiments.

[0115] Figure 4 This is a schematic diagram of the structure of a battery pack sampling front-end testing system as shown in an embodiment of this application.

[0116] See Figure 4 The battery pack sampling front-end testing system 400 includes:

[0117] The mode determination module 410 is used to determine the current test mode based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end.

[0118] In this embodiment of the application, the test objects include a sampling board before welding and a sampling front end integrated after welding in the battery pack. The mode determination module 410 can first determine whether the connected test object is a sampling board or a sampling front end based on the access situation of the test object, thereby further determining the current test mode corresponding to the test object.

[0119] The power supply module 420 is used to supply power to the test object corresponding to the current test mode according to the current test mode.

[0120] According to the current test mode, the power supply module 420 supplies power to the test object corresponding to the current test mode. If the test object is the sampling board of the battery pack, the sampling board is powered; if the test object is the sampling front end of the battery pack, the sampling front end is powered. The power supply module 420 can be an analog power supply, which can simulate the cell voltage with the same number of cells as a real battery pack.

[0121] The test execution module 430 is used to execute preset test cases on the test object after the power supply module has completed power supply; and output the test results.

[0122] After power is supplied, the test execution module 430 can be used to execute preset test cases on the test object. Different preset test cases can be pre-edited for different test objects. After the test is completed, the test results for the test object can be output.

[0123] This application discloses a sampling front-end testing system for battery packs. It can perform corresponding tests on the test object, detect problems in advance, and clarify the state of the sampling board before and after secondary processing of the sampling board in the C2P solution battery pack production line. This avoids the waste of materials and production line capacity due to the abnormal quality of each component of the sampling front-end before the integration and welding of the sampling front-end, which would lead to the scrapping of the entire sampling front-end after welding. At the same time, it can be used for the off-line testing of the sampling front-end to ensure that the sampling front-end functions normally before the integration of the C2P solution battery pack.

[0124] Figure 5 This is another structural schematic diagram of a battery pack sampling front-end testing system shown in an embodiment of this application.

[0125] See Figure 5 The system includes:

[0126] The mode determination module 410 is used to determine the current test mode based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end.

[0127] In an optional embodiment of this application, the system further includes a sampling board fixture 440 and a sampling front-end fixture 450; the mode determination module 410 includes:

[0128] The first mode determination module 411 is used to determine, based on the sampling board fixture connected to the sampling board, whether the current test mode is the sampling board detection mode for the battery pack sampling board; or,

[0129] The second mode determination module 412 determines the current test mode as the sampling front-end detection mode for the sampling front-end of the battery pack based on the integrated sampling front-end access sampling front-end tooling.

[0130] The sampling board fixture 440 is used to place and connect the sampling board 510 to be tested. The sampling board 510 to be tested is usually a completed sampling board ready to enter the integration welding process. The sampling board is an important component of the battery management system, mainly used to collect key parameters such as voltage and temperature of each battery cell in the battery pack for monitoring and management.

[0131] The sampling front-end fixture 450 is used to place and connect the sampling front-end 520 to be tested. The sampling front-end 520 to be tested is typically a completed sampling front-end ready for C2P battery pack integration and soldering. The sampling front-end is a component in the BMS, responsible for converting the voltage, current, and temperature signals of individual battery cells into signals suitable for processing by the BMS main control unit. It typically includes an analog front-end (AFE, Active Front End) circuit for analog signal acquisition and preliminary processing.

[0132] The power supply module 420 is used to supply power to the test object corresponding to the current test mode according to the current test mode.

[0133] In an optional embodiment of this application, the system further includes a switching module 460.

[0134] The switching module 460 is used to switch the operating mode to the sampling board detection mode when the current test mode is the sampling board detection mode for the battery pack; the power supply module supplies power to the sampling board and sampling board fixture corresponding to the switched sampling board detection mode; the test execution module executes preset test cases to test the sampling board after the power supply module has completed power supply; or,

[0135] The switching module 460 is used to switch the operating mode to the sampling front-end detection mode when the current test mode is the sampling front-end detection mode for the battery pack; the power supply module supplies power to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode according to the switched sampling front-end detection mode; the test execution module executes preset test cases to test the sampling front-end after the power supply module completes the power supply.

[0136] The switching module 460 can switch the control of the sampling front-end test system to test different test objects of the battery pack. It can be a switching switch, which can be set to the "sampling board fixture" position or the "sampling front-end fixture" position to test the sampling board 510 or the sampling front-end 520.

[0137] The test execution module 430 is used to execute preset test cases on the test object after the power supply module has completed power supply; and output the test results.

[0138] The test execution module 430 includes a host computer 530, a communication transceiver 540, and a control board 550. The host computer 530 can run preset test cases, record the test results corresponding to the preset test cases, and output corresponding test reports. The communication transceiver 540 can communicate between the control board 550 and the host computer 530, enabling information to be transferred between them. The control board 550 can run test software and execute preset operations in the preset test cases, such as reading voltage sampling values, temperature sampling values, injecting short-circuit faults, and injecting open-circuit faults. If the preset test cases are for the sampling front-end 520, the preset operations may also include performing insulation withstand voltage tests and impedance tests.

[0139] The sampling front-end test system also includes communication harness 560 and power supply harness 570, see [link / reference] Figure 5 The solid line represents the communication harness 560, and the dashed line represents the power supply harness 570. The communication harness 560 connects the host computer 530, the communication transceiver 540, and the control board 550 in the test execution module 430; it also connects the control board 550 to the switching module 460, the mode determination module 410, the mode determination module 410, the sampling board fixture 440, and the sampling front-end fixture 450, and can be used for communication between the control board 550 and the sampling board 510. The power supply harness 570 connects the power module 420 and the switching module 460; it also connects the switching module 460 to the mode determination module 410, the mode determination module 410, the sampling board fixture 440, and the sampling front-end fixture 450, and can be used to introduce the battery cell voltage of the power module 420 to the sampling board. The communication harness 560 and power supply harness 570 between the sampling board fixture 440 and the sampling front-end fixture 450 are controlled by the switching module 460, thereby selecting to switch between testing the sampling board sample and the sampling front-end sample.

[0140] The sampling board fixture 440 includes probes and reserved test points. The probes and reserved test points are structurally compatible with each other to connect the analog voltage of the communication harness 560 and the power module 420 to the sampling board 510.

[0141] The sampling front-end fixture 450 also includes a probe and a nickel plate. The contact between the probe and the nickel plate connects the analog voltage of the communication harness 560 and the power module 420 to the sampling front-end 520, and finally into the sampling board in the sampling front-end 520.

[0142] The sampling board fixture 440 and the sampling front end fixture 450 need to be fully matched with the structural design of the sampling board 510 and the sampling front end 520, respectively, so as to facilitate the rapid introduction or disconnection of voltage signals to switch test samples through probes.

[0143] The sampling front end 520 includes components such as a qualified sampling board 510, integrated busbar, switch plate, flexible circuit and bracket.

[0144] The battery pack sampling front-end testing system provided in this application embodiment is a separate component-level testing system used in the battery pack production line before and after the sampling front-end component is assembled into a PCBA (Printed Circuit Board Assembly). This system ensures the reliability and normal function of the PCBA component and the analog front-end component.

[0145] This application discloses a battery pack sampling front-end testing system, which can switch between different modes to test different test objects according to the access situation of the test object. It can detect problems in advance and clarify the state of the sampling board before and after the secondary processing of the sampling board in the C2P solution battery pack sampling front-end production line. This avoids the waste of materials and production line capacity due to the abnormal quality of each component of the sampling front-end before the integration and welding of the sampling front-end, which would lead to the scrapping of the entire sampling front-end after welding. At the same time, it can be used for the offline testing of the sampling front-end to ensure that the sampling front-end functions normally before the integration of the C2P solution battery pack.

[0146] Figure 6 This is another structural schematic diagram of a battery pack sampling front-end testing system shown in an embodiment of this application.

[0147] See Figure 6 The system includes:

[0148] The mode determination module 410 is used to determine the current test mode based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end.

[0149] In an optional embodiment of this application, the system further includes a sampling board fixture 440 and a sampling front-end fixture 450; the mode determination module 410 includes:

[0150] The first mode determination module 411 is used to determine, based on the sampling board fixture 440 connected to the sampling board, whether the current test mode is a sampling board detection mode for the battery pack sampling board; or,

[0151] The second mode determination module 412 determines the current test mode as the sampling front-end detection mode for the sampling front-end of the battery pack based on the integrated sampling front-end access sampling front-end fixture 450.

[0152] The power supply module 420 is used to supply power to the test object corresponding to the current test mode according to the current test mode.

[0153] The test execution module 430 is used to execute preset test cases on the test object after the power supply module has completed power supply; and output the test results.

[0154] In an optional embodiment of this application, the power module 420 includes a first power module 421 and a second power module 422, and the test execution module includes a first test execution module 431 and a second test execution module 432.

[0155] The first power module 421 is used to provide the first power supply to the sampling board 510 and the sampling board fixture 440 corresponding to the sampling board detection mode when the current test mode is the sampling board detection mode for the sampling board of the battery pack.

[0156] The first test execution module 431 is used to perform a first test on the sampling board 510 by executing preset test cases after the first power supply module has completed power supply; or...

[0157] The second power module 422 is used to provide a second power supply to the sampling front-end 520 and the sampling front-end fixture 450 corresponding to the sampling front-end detection mode when the current test mode is the sampling front-end detection mode for the sampling front-end of the battery pack.

[0158] The second test execution module 432 is used to perform a second test on the sampling front end 520 by executing preset test cases after the second power supply module has completed power supply.

[0159] In this embodiment, the sampling plate fixture 440 and the sampling front end fixture 450 can be installed in two different devices, and the sampling plate detection mode and the sampling front end detection mode can be run in the different devices to detect the sampling plate and the sampling front end respectively.

[0160] This application discloses a sampling front-end testing system for battery packs. It can use different testing systems to test different test objects based on their access conditions, enabling early detection of problems and clarifying the state of the sampling board before and after secondary processing on the sampling front-end production line of the C2P battery pack. This avoids the waste of materials and production line capacity due to abnormal quality of components in the sampling front-end before integration and welding, which could lead to the scrapping of the entire sampling front-end after welding. Simultaneously, it can be used for offline testing of the sampling front-end, ensuring the normal functioning of the sampling front-end before integration into the C2P battery pack.

[0161] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated further here.

[0162] Figure 7 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this application.

[0163] See Figure 7 The electronic device 700 includes a memory 710 and a processor 720.

[0164] The processor 720 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0165] Memory 710 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage devices. ROM may store static data or instructions required by the processor 720 or other modules of the computer. Permanent storage devices may be read-write storage devices. Permanent storage devices may be non-volatile storage devices that retain stored instructions and data even when the computer is powered off. In some embodiments, permanent storage devices use mass storage devices (e.g., magnetic or optical disks, flash memory) as permanent storage devices. In other embodiments, permanent storage devices may be removable storage devices (e.g., floppy disks, optical drives). System memory may be a read-write storage device or a volatile read-write storage device, such as dynamic random access memory. System memory may store some or all of the instructions and data required by the processor during operation. Furthermore, memory 710 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (e.g., DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, memory 710 may include a removable storage device that is readable and / or writable, such as a laser disc (CD), a read-only digital multifunction optical disc (e.g., DVD-ROM, dual-layer DVD-ROM), a read-only Blu-ray disc, an ultra-high density optical disc, a flash memory card (e.g., SD card, mini SD card, Micro-SD card, etc.), a magnetic floppy disk, etc. Computer-readable storage media do not contain carrier waves or transient electronic signals transmitted wirelessly or via wired connections.

[0166] The memory 710 stores executable code, which, when processed by the processor 720, can cause the processor 720 to execute part or all of the methods described above.

[0167] Furthermore, the method according to this application can also be implemented as a computer program or computer program product, which includes computer program code instructions for performing some or all of the steps in the method described above.

[0168] Alternatively, this application may be implemented as a computer-readable storage medium (or a non-transitory machine-readable storage medium or a machine-readable storage medium) storing executable code (or computer program or computer instruction code) thereon, which, when executed by a processor of an electronic device (or server, etc.), causes the processor to perform part or all of the steps of the methods described above according to this application.

[0169] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for testing the sampling front end within a battery pack, characterized in that, include: The current test mode is determined based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end; The test modes include a sampling board detection mode for the sampling board of the battery pack and a sampling front-end detection mode for the sampling front-end of the battery pack. Power is supplied to the test object corresponding to the current test mode according to the current test mode, and after the power supply is completed, the preset test cases corresponding to the test object are executed to test the test object; Output the test results.

2. The method according to claim 1, characterized in that, The process of determining the current test mode based on the access status of the test object includes: Based on the sampling board connection to the sampling board fixture, the current test mode is determined to be the sampling board detection mode for the sampling board of the battery pack; or, Based on the integrated sampling front-end access sampling front-end tooling, the current test mode is determined to be the sampling front-end detection mode for the sampling front-end of the battery pack.

3. The method according to claim 2, characterized in that, The step of supplying power to the test object corresponding to the current test mode according to the current test mode, and then executing preset test cases on the test object after power supply is completed, includes: When the current test mode is the sampling board detection mode, switch the operating mode to the sampling board detection mode for the battery pack; according to the switched sampling board detection mode, power supply is provided to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after power supply is completed, the sampling board is tested using preset test cases; or, When the current test mode is the sampling front-end detection mode, the running mode is switched to the sampling front-end detection mode for the battery pack; according to the switched sampling front-end detection mode, power is supplied to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode; after power supply is completed, preset test cases are executed to test the sampling front-end.

4. The method according to claim 2, characterized in that, The step of supplying power to the test object corresponding to the current test mode according to the current test mode, and then executing preset test cases on the test object after power supply is completed, includes: When the current test mode is the sampling board detection mode for the sampling board of the battery pack, the first power module provides initial power to the sampling board and sampling board fixture corresponding to the sampling board detection mode; after power supply is completed, the first test execution module executes preset test cases on the sampling board to perform the first test; or, When the current test mode is the sampling front-end detection mode for the sampling front-end of the battery pack, the second power supply module provides a second power supply to the sampling front-end and sampling front-end tooling corresponding to the sampling front-end detection mode; after the power supply is completed, the second test execution module executes preset test cases to perform a second test on the sampling front-end.

5. The method according to any one of claims 1 to 4, characterized in that, The output test results include: If the difference between the detected value of the preset parameter and the target value of the corresponding parameter in the preset test case is within the preset error range, the test result indicating that the test has passed will be output.

6. A sampling front-end testing system for a battery pack, characterized in that, include: The mode determination module is used to determine the current test mode based on the access status of the test object, wherein the test object includes at least the sampling board inside the battery pack and the integrated sampling front end; The test modes include a sampling board detection mode for the sampling board of the battery pack and a sampling front-end detection mode for the sampling front-end of the battery pack. A power supply module is used to supply power to the test object corresponding to the current test mode according to the current test mode; The test execution module is used to perform tests on the test object by executing preset test cases corresponding to the test object after the power module has completed power supply; Output the test results.

7. The system according to claim 6, characterized in that, The system also includes a sampling board fixture and a sampling front-end fixture; the mode determination module includes: The first mode determination module is used to determine, based on the sampling board fixture connected to the sampling board, the current test mode as the sampling board detection mode for the sampling board of the battery pack; or, The second mode determination module determines the current test mode as the sampling front-end detection mode for the sampling front-end of the battery pack based on the integrated sampling front-end access sampling front-end tooling.

8. The system according to claim 7, characterized in that, The system also includes a switching module; The switching module is used to switch the operating mode to the sampling board detection mode for the battery pack when the current test mode is the sampling board detection mode; the power module supplies power to the sampling board and sampling board fixture corresponding to the switched sampling board detection mode; the test execution module executes preset test cases on the sampling board to test it after the power module completes power supply; or, The switching module is used to switch the running mode to the sampling front-end detection mode for the battery pack when the current test mode is the sampling front-end detection mode. The power module supplies power to the sampling front end and sampling front end tooling corresponding to the switched sampling front end detection mode. The test execution module performs preset test cases on the sampling front end after the power module completes power supply.

9. The system according to claim 7, characterized in that, The power module includes a first power module and a second power module, and the test execution module includes a first test execution module and a second test execution module; The first power module is used to provide a first power supply to the sampling board and sampling board fixture corresponding to the sampling board detection mode when the current test mode is the sampling board detection mode for the sampling board of the battery pack. The first test execution module is used to perform a first test on the sampling board by executing preset test cases after the first power module has completed power supply; or, The second power module is used to provide a second power supply to the sampling front end and sampling front end tooling corresponding to the sampling front end detection mode when the current test mode is the sampling front end detection mode for the sampling front end of the battery pack. The second test execution module is used to perform a second test on the sampling front end by executing preset test cases after the second power module has completed power supply.

10. An electronic device, characterized in that, include: processor; as well as A memory having executable code stored thereon, which, when executed by the processor, causes the processor to perform the method as described in any one of claims 1-5.

11. A computer-readable storage medium, characterized in that, It stores executable code that, when executed by a processor of an electronic device, causes the processor to perform the method as described in any one of claims 1-5.

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