A voltage testing method and apparatus

Abstract

The application discloses a voltage testing method and device, which is used for detecting voltage values of a plurality of battery cells in a battery pack. The method comprises the following steps: determining the position of a measuring point corresponding to each battery cell in the battery pack, and controlling the battery pack to move so that each battery cell moves to a corresponding measuring area; determining the target position of each probe of a probe array according to the position of the measuring point corresponding to each battery cell; the number of probes in the probe array is greater than or equal to the number of battery cells in the battery pack; controlling a plurality of probes of the probe array to move to the target positions respectively; and controlling the entire probe array to move so that each probe in the probe array contacts the measuring point of the battery cell, thereby obtaining the voltage values of all battery cells in the battery pack. The application can be adapted to different specifications of battery packs, the target position of each probe of the probe array is determined according to the position of the measuring point corresponding to each battery cell, and then the probes are controlled to move towards the battery pack, so that all probes can reliably contact the measuring points of the battery pack at the same time.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and specifically to a voltage testing method and apparatus. Background Technology

[0002] Battery pack 2 is typically composed of multiple cells connected in series and parallel. Its performance and safety are highly dependent on the consistency of the state of each cell. Therefore, in the manufacturing, factory quality inspection and maintenance stages, rapid and accurate testing of the voltage of each cell in the battery pack is a key step in assessing its consistency, detecting defects (such as poor soldering, short circuits) and determining its health status.

[0003] Currently, the industry commonly uses specialized testing fixtures for contact measurements. For example, a pressing mechanism drives a fixed probe array to simultaneously contact various measurement points on the battery module to collect voltage data. For instance, patent CN223296109U, entitled "A Battery Module Testing Fixture," includes a carrier assembly and a pressing assembly. The carrier assembly includes a sliding support module, a carrier plate, and a lifting module. The movable end of the lifting module engages with the carrier plate at the upper end of the sliding support module. The pressing assembly includes a pressing bracket, a pressing module, and a probe module. The probe module includes a pressing connecting plate, an insulating probe support plate, and probes. Several insulating probe support plates are connected to the lower end face of the pressing connecting plate. Two sets of probes are respectively positioned at both ends of the insulating probe support plates. The movable end of the pressing module is connected to the upper end of the pressing connecting plate. The pressing module drives the probes at both ends of the insulating probe support plates to engage with the battery module's voltage and internal resistance terminals at the upper end of the carrier plate, respectively.

[0004] However, this type of fixed tooling has significant drawbacks: its probe layout is strictly tied to the measurement point positions of a specific battery module model. Once the battery pack specifications (such as the number of cells, arrangement, and size) change, the entire tooling must be redesigned, manufactured, and replaced. This results in extremely poor equipment flexibility, high changeover costs, and long cycles, making it unable to adapt to the trend of rapid iteration of battery products and flexible manufacturing of small batches and multiple varieties.

[0005] Therefore, there is an urgent need for a voltage testing method that can quickly adapt to battery packs of different specifications, while retaining the advantages of high measurement efficiency and solving the core problem of poor adaptability of existing fixed tooling. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this application provides a voltage testing method and apparatus that can be adapted to battery packs of different specifications. Based on the measurement point position corresponding to each cell, the target position of the probe array on the voltage testing device is determined, the entire probe array is controlled to move to the target position, and then the probes are controlled to move towards the battery pack so that all probes simultaneously and reliably contact the battery pack measurement point.

[0007] To address the above problems, the present invention provides the following technical solution: In a first aspect, embodiments of this application provide a voltage testing method applied to a voltage testing device. The voltage testing device is used to detect the voltage values ​​of multiple cells in a battery pack. The voltage testing method includes: Determine the measurement point position corresponding to each cell in the battery pack, and control the battery pack to move so that each cell moves to the corresponding measurement area; Based on the measurement point location corresponding to each cell, the target position of each probe in the probe array is determined, and the number of probes in the probe array is greater than or equal to the number of cells in the battery pack. The probe array is controlled to move multiple probes to the target position respectively; The entire probe array is controlled to move so that each probe in the probe array contacts the measurement point of the cell to obtain the voltage value of all cells in the battery pack.

[0008] In some implementations, the method further includes: The quality of each cell in the battery pack is determined by its voltage value.

[0009] In some implementations, the measurement point location corresponding to each cell in the battery pack includes at least one of the X, Y, and Z coordinates of the measurement point. Determining the measurement point location corresponding to each cell in the battery pack includes: Acquire the layout information of multiple cells in the battery pack under test, the distance between the centers of measurement points of adjacent cells, and the relevant height information of the cells; The X and Y coordinates of the measurement point are determined based on the layout information and the distance between the centers of the measurement points of adjacent cells. The Z coordinate of the measurement point is determined based on the relevant height information of the cell.

[0010] In some implementations, the target position of each probe in the probe array is determined based on the measurement point position corresponding to each battery cell; the entire probe array is controlled to move so that the probe contacts the measurement point of the battery cell, including: The target position of each probe in the probe array is determined based on the first and second coordinates of each measurement point. The movement distance of the probe array is calculated based on the third coordinate of each measurement point; The entire probe array is moved according to the moving distance so that the probes contact the measurement points of the battery cell.

[0011] In some implementations, controlling the entire probe array to move so that each probe in the probe array contacts a measurement point on the battery cell includes: After the probe array is moved as a whole, the electrical contact state between each probe and the measurement point or the resistance experienced by the probe is monitored. When it is detected that each probe has formed a stable electrical contact with the measurement point, or when the resistance experienced by each probe reaches a preset threshold, the probe array is controlled to stop moving so that each probe contacts the measurement point of the battery cell.

[0012] Secondly, embodiments of this application provide a voltage testing device for detecting the voltage values ​​of multiple cells in a battery pack. The voltage testing device includes: The base is used to support the battery pack; The probe array includes multiple probes with adjustable positions for contacting measurement points in each cell of the battery pack to obtain voltage signals. A drive mechanism is used to drive the probe array to move, so that each probe in the probe array contacts the corresponding measurement point. The control unit is used to perform the voltage test method described above.

[0013] In some embodiments, the voltage testing apparatus further includes: The positioning component is replaceably mounted on the base to limit the position of battery packs of different specifications, so that the battery pack is fixed in a preset test position.

[0014] In some implementations, a test board is also included, with a probe array disposed on the test board, and the drive mechanism includes a cylinder and a valve. The test board is connected to the end of the piston rod of the cylinder. The drive mechanism adjusts the cylinder through the air valve, thereby controlling the movement of the piston rod and driving the test board to move.

[0015] In some embodiments, the battery pack is placed inside the battery pack housing, and the positioning component is a positioning block that matches the shape of the battery pack housing. The positioning block is detachably installed in a preset position on the base by means of plugging, snapping, or magnetic adsorption.

[0016] In some implementations, the base is provided with slide rails to guide the battery pack to slide in and out of the test position.

[0017] This application provides a voltage testing method and apparatus. This application can be adapted to battery packs of different specifications. When the number or arrangement of cells in the battery pack under test is changed, or when the size of each cell in the battery pack is changed, the probes of this application can determine the target position of the probe array on the voltage testing device according to the measurement point position corresponding to each cell, without the need to replace the probe module. Attached Figure Description

[0018] Figure 1This is a schematic flowchart of the voltage testing method provided in the embodiments of this application.

[0019] Figure 2 This is a first three-dimensional structural schematic diagram of the voltage testing device provided in the embodiments of this application.

[0020] Figure 3 This is a schematic diagram of the second three-dimensional structure of the voltage testing device provided in the embodiments of this application.

[0021] Figure 4 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application.

[0022] Figure 5 This is a structural block diagram of a computer-readable storage medium provided in an embodiment of this application.

[0023] In the diagram, 1 is the base; 2 is the battery pack; 3 is the test board; 4 is the probe array; 5 is the drive mechanism; 51 is the air valve; 52 is the cylinder; 6 is the positioning component; 7 is the display screen; 8 is the tooling bracket; and 9 is the slide rail. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] The voltage testing method provided in this application will be described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1 , Figure 1 This is a schematic flowchart of the voltage testing method provided in the embodiments of this application. Figure 1 As shown, the voltage testing method includes steps S100 to S500. The voltage testing method of this application is applied to a voltage testing device for detecting the voltage values ​​of multiple cells in a battery pack.

[0028] Step S100: Determine the measurement point position corresponding to each cell in the battery pack, and control the battery pack to move so that each cell moves to the corresponding measurement area.

[0029] In some implementations, the measurement point is a physical area on each cell in the battery pack 2 used for electrical contact to measure its voltage. Alternatively, the measurement point may be an electrode connection piece, a terminal post, or a test terminal located on the cell.

[0030] Optionally, the measurement point is located on top of the battery cell.

[0031] In some embodiments, the measurement point position corresponding to each cell in the battery pack 2 includes at least one of a first coordinate, a second coordinate, and a third coordinate, wherein the first coordinate, the second coordinate, and the third coordinate can all be X-axis coordinates, Y-axis coordinates, or Z-axis coordinates. The method for determining the measurement point position corresponding to each cell in the battery pack 2 is as follows: The layout information of multiple cells in the battery pack under test 2, the distance between the centers of measurement points of adjacent cells, and the cell-related height information are obtained. Based on the layout information and the distance between the centers of measurement points of adjacent cells, the first and second coordinates of each measurement point in a two-dimensional plane are determined. The layout information includes the number of rows and columns of the cells. Based on the cell-related height information, the third coordinate of each measurement point in a direction perpendicular to the two-dimensional plane is determined. The cell-related height information includes the first height and the second height. The first height is the height of the cell when it is normally placed vertically, and the second height is the height of the measurement point when the cell is normally placed vertically. When the measurement point of the cell is at the top, the first height is the value of the third coordinate; when the measurement point of the cell is not at the top, the second height is the value of the third coordinate.

[0032] In some implementations, if multiple battery cells are vertically placed inside the battery pack 2 casing, with the cells close to the casing, and the probe array 4 is positioned above the battery pack 2, the first and second coordinates of the measurement points are determined based on the layout information and the distance between the centers of the measurement points of adjacent cells. The first and second coordinates are the X and Y coordinates, respectively. A coordinate system is established with the lower left corner of the battery pack 2 casing as the origin, extending horizontally to the right as the X-axis and vertically upwards as the Y-axis. The two-dimensional coordinates of each cell's measurement point can be calculated using the number of rows and columns of the cells and the distance between the centers of the measurement points of adjacent cells. Specifically, assuming the battery pack 2 cell layout is M rows and N columns, the distance between the centers of the measurement points of adjacent cells includes the distance between the centers of the measurement points of adjacent cells in each row. The distance between the center of the measurement point of each adjacent cell in each row. Then the coordinates of the cell measurement point in the i-th row and j-th column are ( , The following formula can be used for calculation: = (j-1)* , = (i-1) * ; In the formula, Let i be the coordinates of the cell measurement point in the i-th row and j-th column. The distance between the centers of the measurement points of adjacent cells in each row. The distance between the centers of the measurement points of adjacent cells in each column.

[0033] In some embodiments, if the battery cell is placed horizontally inside the battery pack 2 housing, the battery cell is close to the battery pack 2 housing, and the probe array 4 is located on the side of the battery pack 2, then the calculated first coordinate and second coordinate are the X-axis coordinate and Z-axis coordinate of each battery cell, or the Y-axis coordinate and Z-axis coordinate of each battery cell.

[0034] The method described above for calculating the coordinates of each cell is simple, does not rely on camera components, and can be completed by obtaining the specifications of the battery pack 2 through fixed mechanical references and geometric calculations.

[0035] In some implementations, controlling the movement of the battery pack to move each cell to its corresponding measurement area can be achieved by placing the battery pack on a slide rail, which then moves the battery pack. A positioning component can then limit the battery pack to a preset test area. At this point, each cell on the battery pack is located within the preset test area, ensuring that the measurement point of each cell in the battery pack and the probes of the probe array are in the same reference coordinate system, thereby laying the foundation for subsequent accurate contact and measurement.

[0036] Step S200: Determine the target position of each probe in the probe array based on the measurement point position corresponding to each cell; the number of probes in the probe array is greater than or equal to the number of cells in the battery pack.

[0037] In some implementations, the target position of the corresponding probe on the voltage testing device is determined based on the first and second coordinates of each measurement point.

[0038] Step S300: Control the multiple probes of the probe array to move to the target position respectively.

[0039] In some implementations, each probe in the probe array 4 is mounted in a movable slider, which is slidably connected to the test board, and the voltage testing device drives the slider to move to the corresponding target position.

[0040] The probe moves to the target position in a two-dimensional plane. The purpose is to correspond one-to-one with the measurement points of multiple cells so that the probe can accurately contact the measurement points when the probe array moves as a whole.

[0041] In some implementations, the control unit selects probes that match the rows and columns of the battery pack based on the battery pack's layout information. The selected probes form a subset of the probes, with each probe corresponding to a single measurement point for each battery cell. A shortest path from the current position to its corresponding measurement point is calculated independently and simultaneously for each probe, planned as a movement first in the X direction and then in the Y direction. Because all the battery cells in the pack are of the same size and closely arranged, the paths of each probe are parallel in space and do not intersect, eliminating the possibility of collisions.

[0042] Step S400: Control the entire probe array to move so that each probe in the probe array contacts the measurement point of the cell to obtain the voltage value of all cells in the battery pack.

[0043] In some implementations, the movement distance of the entire probe array is calculated based on a third coordinate. For example, if the cells of battery pack 2 are placed vertically, the probe array is located above battery pack 2, and the measurement point is located at the top of the cell, the third coordinate is the Z-axis coordinate of the measurement point. Since multiple cells in a battery pack have the same model, their measurement points are at the same height, so the Z-axis coordinate of the measurement point is a uniform value. By subtracting the Z-axis coordinate value from the height of the probe tip, the downward movement distance of the probe array can be determined.

[0044] In some implementations, for example, the battery cells of battery pack 2 are placed horizontally, the probe array is located on the side of battery pack 2, the measurement point is located at the front end of the battery cell, and the third coordinate is the X-axis coordinate or Y-axis coordinate of the measurement point. The moving distance of the probe array forward can be determined by subtracting the third coordinate value from the X-axis coordinate value or Y-axis coordinate value of the position of the probe tip.

[0045] In some implementations, the third coordinate value can be omitted, and the probe can be directly controlled to move towards the measurement point; the electrical contact state between the probe and the measurement point or the resistance experienced by the probe can be monitored in real time; when a stable electrical contact is detected between the probe and the measurement point, or the resistance experienced by the probe reaches a preset threshold, the probe is controlled to stop moving. At this time, the probe contacts the measurement point of the battery cell and realizes the measurement of the voltage value.

[0046] After the probe array moves, the system monitors the signals collected by the probes to determine whether all probes are in contact. If all probes are in contact, a sampling signal is sent synchronously to the probe array, which then collects the voltage values ​​to obtain the voltage values ​​of all cells in battery pack 2.

[0047] Step S500: Determine whether each cell is qualified based on its voltage value in battery pack 2.

[0048] In some implementations, the average value of all cell voltages is calculated, and the difference between each cell voltage value and the average value is calculated. Based on whether the difference exceeds a preset threshold, it is determined whether each cell is qualified. If the voltage value of a certain cell differs significantly from the average value, it is determined that the cell is unqualified or the batch of battery packs 2 is unqualified, and an audible and visual alarm can be triggered.

[0049] In some implementations, the serial number of the defective battery cell is displayed on the display screen 7 to facilitate the staff in picking out the battery cell.

[0050] In summary, the voltage testing method provided in this application has the following advantages: With its adjustable probe position design, it can quickly adapt to different battery pack specifications, completely avoiding the huge cost and time of customizing a complete set of tooling for each model, and saving manpower and time spent on replacing probe modules.

[0051] Please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 These are schematic diagrams of the first and second structures of the voltage testing device provided in the embodiments of this application. Figure 2 and 3 As shown, the voltage testing device includes a base 1, a control unit, a probe array 4, a drive mechanism 5, a test board 3, a positioning component 6, a display screen 7, a tooling bracket 8, and a slide rail 9.

[0052] The base 1 is located at the bottom and supports the battery pack 2. A slide rail 9 is mounted on the base 1 to guide the battery pack 2 to slide into and out of the test position. A positioning block is located on one side of the slide rail 9 to restrict the movement of the battery pack 2 when it moves to the test position. The bottom of the fixture bracket 8 is fixedly connected to the base 1, and a drive structure is mounted on the top of the fixture bracket 8, with a test plate 3 mounted in the middle. A probe array 4 is mounted on the test plate 3, comprising multiple adjustable probes for contacting the measurement points of each cell in the battery pack 2 to obtain voltage signals. A drive mechanism 5 drives the probe array 4 to move, causing the probe array to contact the corresponding measurement points. A display screen 7 is mounted on one side of the cylinder to display the measured voltage value, or whether the batch of battery packs 2 is qualified, or the number and serial number of unqualified cells.

[0053] The control unit is connected to the probe array 4, the drive structure, and the display screen 7. The control unit is used to determine the measurement point position corresponding to each cell in the battery pack 2; determine the target position of the probe array on the voltage testing device according to the measurement point position corresponding to each cell; control the probe array to move synchronously so that the probes contact the measurement point of the cell; obtain the voltage value of all cells in the battery pack 2 through the probe array; calculate the average value of all cell voltage values; calculate the difference between the voltage value of each cell and the average value; determine whether each cell is qualified according to whether the difference exceeds a preset threshold; if there is a cell whose voltage value differs greatly from the average value, then the cell is determined to be unqualified or the batch of battery pack 2 is unqualified.

[0054] In some embodiments, the positioning component 6 is replaceably disposed on the base 1 to limit the battery packs 2 of different specifications, so that the battery packs 2 are fixed in a preset test position. Each positioning component 6 is dedicated to a battery pack 2 of a specific model or specification, precisely limiting and fixing the battery pack 2 in the preset test position. The control unit determines the target position of the corresponding probe on the voltage testing device based on the test position. The replaceable positioning component 6 provided in this application establishes a unique and stable coordinate system by precisely positioning the battery pack 2, thereby improving the accuracy of the first and second coordinates of the measurement point of the battery pack 2. The probe array 4 is automatically adjusted according to the first and second coordinates to ensure that the probe array 4 can accurately contact the measurement point after the test plate 3 moves, avoiding misalignment between the probe array 4 and the measurement point after the probe array 4 moves due to the inconsistency between the reference of the battery pack 2 and the probe array 4.

[0055] In some embodiments, the positioning component 6 is connected to a control unit, which includes target location information for battery packs 2 of different models or layouts to form a target location dataset. The control unit automatically retrieves the probe target location dataset for that model or layout of battery pack 2 from the database by recognizing an identifier on the positioning component 6 or by having the model number entered by the operator. The drive mechanism 5 then drives each probe to move according to this dataset, forming a layout that matches the measurement points of the battery pack 2.

[0056] This application addresses the issue of battery packs 2 with different specifications or models. For example, when replacing a battery pack 2 with 20 cells to one with 24 cells, the spacing between the centers of the measurement points of adjacent cells remains unchanged, but the layout information changes, specifically the number of rows and columns. Structurally, only the positioning blocks need to be replaced. Simultaneously, by acquiring the first and second coordinates of the measurement points of the cells in battery pack 2, each probe automatically adjusts its position on the test board 3. This ensures that the probes can accurately contact the measurement points after the test board 3 moves, avoiding the need to replace additional structures, such as probe modules, thus saving manpower and improving efficiency.

[0057] In some embodiments, the battery pack 2 is placed inside the battery pack 2 housing, and the positioning component 6 is a positioning block that matches the shape of the battery pack 2 housing. The positioning block is detachably installed at a preset position on the base 1 by means of plugging, snapping or magnetic adsorption.

[0058] In some embodiments, the drive structure includes a cylinder 52 and a valve 51. The test plate 3 is connected to the end of the piston rod of the cylinder 52. The drive mechanism 5 adjusts the cylinder 52 through the valve, thereby controlling the movement of the piston rod and driving the test plate 3 to move. The movement distance of the test plate 3 can be flexibly adjusted by the cylinder 52 and the valve 51, which is suitable for battery packs 2 with a height within a certain range.

[0059] Specifically, the test board 3 includes a probe mounting plate and a support plate. The probe array is mounted on the probe mounting plate. The support plate is provided with multiple columns. The tops of the multiple columns are connected to the support plate, the bottoms of the multiple columns are connected to the probe mounting plate, and the support plate is connected to the end of the piston rod of the cylinder.

[0060] In some implementations, each battery cell in the battery pack 2 has two measurement points, namely the positive and negative terminals on the cell. Every two probes form a set of probes, with the two probes used to contact the positive and negative terminals on a single cell in the battery pack 2, respectively. The set of probes is used together to measure the voltage value of the cell.

[0061] In some implementations, although all cells in a battery pack may be of the same model, there may still be slight differences in the height of some cells. The control unit identifies the cell with the lowest height among all cells, meaning the probe array 4 needs to move to its maximum distance to contact that cell. To ensure that all cells are contacted, the maximum distance that the probe array 4 moves is taken as the final moving distance.

[0062] In some embodiments, the test board 3 is equipped with multiple sliders, each probe of the probe array 4 is fixedly connected to a slider, and each slider is connected to a drive mechanism 5. The drive mechanism 5 drives the multiple sliders to move according to a first coordinate and a second coordinate. Each slider is an independent movable component with a through hole machined in it. The probe is installed in the through hole. The drive mechanism 5 calculates the target position of each probe according to the first coordinate and the second coordinate, and assigns the coordinate data of the target position to the corresponding slider. When the slider moves to the target position, the probe moves to the target position, which is either directly above or directly in front of the corresponding cell measurement point.

[0063] In some implementations, the control unit selects a subset of probes from the probe array based on the layout information of the battery pack 2 under test, including M rows and N columns. For each selected probe, the shortest path from its current position to the target position is calculated independently. Lateral movement can be performed first, followed by longitudinal movement, to avoid interference when multiple probes move. Multiple probes are integrated into multiple sliders, each with a through-hole at its bottom through which the probe tip protrudes. One probe corresponds to one slider. The upper surface of the slider body is equipped with a flat ball bearing, which forms a sliding connection with the stopwatch under the test board, allowing the slider body to be supported by the ball bearings and move freely within the plane of the lower surface of the test board. Each slider is equipped with a first driver and a second driver. The first driver drives the slider to move in the X direction based on the X coordinate of the target position, and the second driver drives the slider to move in the Y direction based on the Y coordinate of the target position.

[0064] In some embodiments, the test plate 3 of this application is fixedly connected by U-shaped holes and tooling bracket 8. Specifically, the test plate 3 is provided with multiple U-shaped slots, and the tooling bracket 8 has threaded holes at corresponding positions. Bolts pass through the U-shaped slots and are screwed into the threaded holes, so that a stable connection is formed between the test plate 3 and the tooling bracket 8.

[0065] In some implementations, the voltage testing device includes a human-machine interface for operators to input commands, including battery pack model and specifications, and the serial number of the positioning component.

[0066] The workflow of this embodiment is as follows: Step 1: Select the corresponding positioning component according to the model and specifications of the battery pack to be tested, and install the positioning component into the preset position on the base by means of plugging, snapping or magnetic adsorption.

[0067] The second step involves the operator placing the battery pack, which is located in the battery pack casing, onto the slide rail and moving it to the test area. The positioning component then precisely positions the battery pack within the required test area.

[0068] The third step is for the operator to input the battery pack model and layout information, or the distance between the centers of the measurement points of adjacent cells, or the number of the positioning component, into the human-machine interface of the control unit. Alternatively, the operator can directly retrieve the corresponding target position from the target position dataset by scanning the markings on the positioning component. Or, based on the battery pack model and layout information and the distance between the centers of the measurement points of adjacent cells, the operator can determine the first and second coordinates of the measurement point and determine the target position based on the first and second coordinates.

[0069] The fourth step is to assign the target location to the probe array, and then move the probe array to the target area so that the layout of the entire probe array corresponds one-to-one with the measurement points of all cells in the battery pack.

[0070] Step 5: The control unit calculates the required movement distance of the probe to contact the measurement point based on the third coordinate; or the control unit directly drives the probe to move vertically downward (when the battery cell is placed vertically and the probe array is located directly above the battery cell) or directly forward (when the battery cell is placed horizontally and the probe array is located directly in front of the battery cell). After the probe array moves, the control unit monitors the electrical contact state between the probe and the measurement point or the resistance experienced by the probe. When a stable electrical contact is detected between the probe and the measurement point, or when the resistance experienced by the probe reaches a preset threshold, the control unit stops the probe from moving so that the probe contacts the measurement point of the battery cell.

[0071] Step 6: The control unit controls the drive mechanism to move the entire rearranged probe array downwards or forwards by a corresponding distance. When moving downwards, the battery pack is placed vertically inside the battery pack casing, and the probe array is located above the battery pack. When moving forwards, the battery pack is placed horizontally inside the battery pack casing, and the probe array is located in front of the battery pack.

[0072] Step 7: The tips of the probe array simultaneously contact their respective cell measurement points to measure the voltage value of a single cell.

[0073] Step 8: The control unit acquires the voltage values ​​of all battery cells, calculates the average voltage of the cells, and determines whether the deviation of each cell's voltage from the average value exceeds a preset threshold. It then identifies the specific defective cell numbers.

[0074] Step 9: The control unit sends the identification results to the display screen, which shows the serial number of the unqualified battery cell and other relevant information.

[0075] In summary, the voltage testing device provided in this application has the following advantages: 1. By designing the positioning component 6, the reference coordinate system of the target position of the probe array 4 is consistent with the reference coordinate system of the measurement point of the battery pack 2, ensuring the accuracy of each probe contact with the measurement point.

[0076] 2. Through the adjustable cooperation of the positioning component 6 and the probe, the target position can be determined directly based on the replacement of the positioning component 6. Each positioning component 6 corresponds to a battery pack 2 with a model or layout information, which greatly improves efficiency.

[0077] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 4As shown, the electronic device 400 includes: one or more processors 410 and a memory 420. Figure 4 Take a processor 410 as an example.

[0078] In some implementations, the processor 410 and the memory 420 may be connected via a bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.

[0079] In some embodiments, the processor 410 is configured to determine the measurement point position corresponding to each cell in the battery pack, control the battery pack to move so that each cell moves to the corresponding measurement area, determine the target position of each probe in the probe array based on the measurement point position corresponding to each cell, wherein the number of probes in the probe array is greater than or equal to the number of cells in the battery pack, control the multiple probes in the probe array to move to the target position respectively, and control the entire probe array to move so that each probe in the probe array contacts the measurement point of the cell to obtain the voltage value of all cells in the battery pack.

[0080] In some embodiments, memory 420 serves as a non-volatile computer-readable storage medium, used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules of the voltage testing method in the embodiments of this application. Processor 410 executes various functional applications and data processing of electronic device 400 by running the non-volatile software programs, instructions, and modules stored in memory 420, thereby implementing the voltage testing method of the above-described method embodiments.

[0081] In some embodiments, memory 420 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of electronic device 400, etc. Furthermore, memory 420 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 420 may optionally include memory remotely located relative to processor 410, and this remote memory may be connected to the controller via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0082] In some implementations, one or more modules are stored in memory 420 and, when executed by one or more processors 410, perform the voltage testing method in any of the above method embodiments, for example, performing the method described above. Figure 1 The method steps S100 to S500.

[0083] In some implementations, the electronic device can be a chip, such as a data processing unit (DPU) chip used in a data center. Alternatively, the electronic device can be a network interface card that includes a chip and multiple interfaces (such as PCI / PCIE interfaces, UART interfaces, USB interfaces, etc.). Or, the electronic device can be a traditional server, or a server that includes a network interface card or chip. The server includes a host and a data processor. The data processor is used to schedule packets to the host or the data processor itself for processing. The host is used to process the packets scheduled by the data processor.

[0084] Please refer to Figure 5 , Figure 5 This is a structural block diagram of a computer-readable storage medium provided in an embodiment of this application. The computer-readable storage medium 500 stores program code 510, which can be called by a processor to execute the voltage testing method described in the above method embodiments.

[0085] The computer-readable storage medium 500 may be an electronic storage device such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium includes non-volatile computer-readable media. transitory computer The computer-readable storage medium 500 has storage space for program code that performs any of the method steps of the voltage testing method described above. This program code can be read from or written to one or more computer program products. The program code can be compressed, for example, in a suitable form.

[0086] In summary, this application provides a voltage testing method, an electronic device, and a storage medium. The voltage testing method includes: determining the measurement point position corresponding to each cell in the battery pack; controlling the battery pack to move so that each cell moves to the corresponding measurement area; determining the target position of each probe in the probe array based on the measurement point position corresponding to each cell; the number of probes in the probe array being greater than or equal to the number of cells in the battery pack; controlling multiple probes in the probe array to move to the target position respectively; and controlling the entire probe array to move so that each probe in the probe array contacts the measurement point of the cell to obtain the voltage value of all cells in the battery pack.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A voltage testing method, characterized in that, An application is made in a voltage testing device, which is used to detect the voltage values ​​of multiple cells in a battery pack. The voltage testing method includes: Determine the measurement point position corresponding to each cell in the battery pack, and control the battery pack to move so that each cell moves to the corresponding measurement area; The target position of each probe in the probe array is determined based on the measurement point position corresponding to each cell; the number of probes in the probe array is greater than or equal to the number of cells in the battery pack. The probe array is controlled to move multiple probes to the target position respectively; The entire probe array is controlled to move so that each probe in the probe array contacts the measurement point of the cell to obtain the voltage value of all cells in the battery pack.

2. The voltage testing method according to claim 1, characterized in that, The method further includes: The quality of each cell in the battery pack is determined by its voltage value.

3. The voltage testing method according to claim 1, characterized in that, Determining the measurement point location corresponding to each cell in the battery pack 2 includes: Acquire the layout information of multiple cells in the battery pack under test, the distance between the centers of measurement points of adjacent cells, and the relevant height information of the cells; Based on the layout information and the distance between the centers of the measurement points of the adjacent cells, determine the first and second coordinates of each measurement point in a two-dimensional plane; Based on the cell-related height information, determine the third coordinate of each measurement point along a direction perpendicular to the two-dimensional plane.

4. The voltage testing method according to claim 3, characterized in that, Based on the measurement point position corresponding to each battery cell, determine the target position of each probe in the probe array; The probe array is controlled to move multiple probes to the target position respectively; Controlling the movement of the entire probe array to bring the probes into contact with the measurement points of the battery cell includes: The target position of each probe in the probe array is determined based on the first and second coordinates of each measurement point. The movement distance of the probe array is calculated based on the third coordinate of each measurement point; The probe array is controlled to move according to the moving distance so that the probe contacts the measurement point of the battery cell.

5. The voltage testing method according to claim 1, characterized in that, Controlling the movement of the entire probe array so that each probe in the probe array contacts a measurement point on the battery cell includes: After the probe array is moved as a whole, the electrical contact state between each probe and the measurement point or the resistance experienced by the probe is monitored. When it is detected that each probe has formed a stable electrical contact with the measurement point, or when the resistance experienced by each probe reaches a preset threshold, the probe array is controlled to stop moving so that each probe contacts the measurement point of the battery cell.

6. A voltage testing device, characterized in that, The voltage testing device is used to detect the voltage values ​​of multiple cells in battery pack 2, and includes: Base 1 is used to support the battery pack 2; The probe array 4 includes multiple probes with adjustable positions for contacting the measurement points of each cell in the battery pack 2 to obtain voltage signals. The driving mechanism 5 is used to drive the probe array 4 to move, so that each probe in the probe array contacts the corresponding measurement point; A control unit for performing the voltage testing method according to any one of claims 1-5.

7. The voltage testing device according to claim 6, characterized in that, The voltage testing device also includes: Positioning component 6 is replaceably disposed on the base 1 and is used to limit the battery pack 2 of different specifications so that the battery pack 2 is fixed in a preset test position.

8. The voltage testing device according to claim 6, characterized in that, It also includes a test board 3, the probe array 4 is disposed on the test board 3, and the drive structure includes a cylinder and a valve; The test plate 3 is connected to the end of the piston rod of the cylinder. The drive mechanism 5 adjusts the cylinder through the air valve, thereby controlling the piston rod to move and driving the test plate 3 to move.

9. The voltage testing device according to claim 7, characterized in that, The battery pack 2 is placed inside the outer casing of the battery pack 2. The positioning component 6 is a positioning block that matches the shape of the outer casing of the battery pack 2. The positioning block is detachably installed at a preset position on the base 1 by means of plugging, snapping or magnetic adsorption.

10. The voltage testing device according to claim 6, characterized in that, The base 1 is provided with a slide rail 9 for guiding the battery pack 2 to slide in and out of the test position.

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