Soft package cell stacking mistake proofing method and device

Abstract

The invention relates to the technical field of soft package batteries, in particular to a soft package battery cell stacking mistake proofing method and device, and the method comprises the steps: building a battery cell data set containing a memory battery cell bar code for battery cells entering a soft package module production line; s2, acquiring and collecting a battery cell bar code for a battery cell circulating in a soft package module production line; s3, comparing the acquired cell bar code with the memory cell bar code, and if a comparison result has a difference, replacing the memory cell bar code with the acquired cell bar code; and S4, establishing a stack bar code according to the cell data set. According to the invention, intelligent mistake proofing of the cell sequence and the cell bar code can be realized, and product traceability is prevented from being influenced by the cell bar code problem after manual intervention processing of production line abnormity.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack batteries, and in particular to a method and device for preventing errors in stacking soft-pack batteries. Background Art

[0002] Soft-pack lithium-ion batteries refer to batteries that use aluminum-plastic film as outer packaging. Compared with square aluminum shell batteries and cylindrical batteries, soft-pack batteries generally swell first when safety hazards occur, or release energy from breaking through the package, and are less likely to explode, so they have higher safety performance; at the same time, soft-pack batteries of the same capacity are lighter than square aluminum shells and have higher energy density. In addition, the shape of soft-pack batteries can be customized according to customer needs, and the design is more flexible, which is more advantageous in the development of new models of batteries. Soft-pack batteries have been widely used in consumer electronics, new energy vehicles, medical devices and other fields.

[0003] The production process of soft-pack batteries includes pulping, fluorine coating, slitting, assembly, packaging, and inspection. The packaging process is to form a stack of assembled cells and use soft packaging materials such as aluminum-plastic film to package them to form a battery with a certain shape and volume. During the packaging process, the cell barcode used for production data traceability is located on the surface of the soft-pack cell. When the cells are stacked into groups, the barcode is hidden inside the stack, and it is impossible to understand the cell sequence of the stack and whether there are any abnormalities in the cell barcode through external inspection or other means.

[0004] In the prior art, the control software only records the order and cell barcodes of the soft-pack cells when they are put online, and the barcode of the final stack also relies on the records of the control software to be bound to the barcode of the soft-pack cells. Since the soft-pack module production line has many process flows, and some processes require manual intervention, the cells will go through a series of processes and tests such as electrical performance testing, tab cutting, plasma cleaning, and surface spraying, of which 3 to 5 require manual intervention. At the same time, the production equipment may have software failures that require technical personnel to detect and handle, and NG cells may appear on the production line and need to be replaced. These may cause the cell barcodes memorized by the control software to be wrong or the order to be wrong, making the cell barcode bound to the soft-pack stack inconsistent with the cell barcode actually contained in the stack, and the production data of the soft-pack cells cannot be effectively recorded and traced. Summary of the invention

[0005] The present invention provides a soft-pack battery cell stacking error prevention method, which can automatically realize the battery cell sequence and battery cell bar code error prevention without manual intervention.

[0006] This application provides the following technical solutions:

[0007] A method for preventing errors in stacking soft-pack battery cells, comprising the following steps:

[0008] S1. Establish a cell data set for the cells entering the soft-pack module production line, wherein the cell data set includes a memory cell barcode, a module tray number carrying the cell, and a test sequence number of the cell in the module tray;

[0009] S2. Obtain and collect the cell barcodes for the cells circulating in the soft-pack module production line according to the module tray number carrying the cell and the test sequence number of the cell in the module tray;

[0010] S3, comparing the collected cell barcode with the memory cell barcode, if there is a difference in the comparison results, using the collected cell barcode to replace the memory cell barcode;

[0011] S4. Create a stack barcode based on the battery cell data set.

[0012] Furthermore, the test sequence number is determined according to the test sequence of the battery cells in the module tray.

[0013] Furthermore, the collected cell barcode and the memorized cell barcode include the cell serial number, cell type, cell traceability information, and cell production date; the stacked body barcode includes the soft-pack battery serial number, soft-pack battery type, soft-pack battery traceability information, soft-pack battery production date, and packaged cell information.

[0014] Furthermore, the packaged battery cell information includes packaged battery cell position information and packaged battery cell barcode information.

[0015] Furthermore, the packaged battery cell position information is determined according to the arrangement position of the packaged battery cell in the stack.

[0016] Furthermore, the module tray is provided with an identification device, and the control program communicates with the identification device to obtain the module tray number.

[0017] Furthermore, in the step S2, multiple cell barcodes are collected for the cells with the same module tray number and the same test sequence number, and in the step S3, the multiple collected cell barcodes are compared with the cell memory barcodes. When there are differences in the comparison results, the collected cell barcodes are used to replace the memory cell barcodes.

[0018] Furthermore, in the step S3, when there is a difference in the comparison result, a processing prompt is sent.

[0019] Principles and advantages:

[0020] Several cell barcode reading devices are set up on the soft-pack module production line. When the cell goes online, a cell data set is established. The cell barcode information at the corresponding position is recorded in the cell data set according to the pallet number and the test sequence number. During the cell circulation process, the cell barcode is collected by the barcode reading device, and the collected cell barcode is compared with the cell barcode at the position recorded in the cell data set. If the comparison finds that the cell barcode is consistent, normal production is carried out. If the comparison finds that the barcode is inconsistent, the memory cell barcode in the cell data set is corrected and replaced, so that the memory cell barcode in the cell data set is consistent with the actual cell barcode in the pallet, so as to achieve the purpose of error prevention and correction before the cells are stacked.

[0021] The method can automatically check the cell sequence and cell barcode data to avoid inconsistency between the recorded cell barcode and the cell barcode information actually contained in the stack, which affects product traceability and makes the production process more intelligent.

[0022] On the other hand, the present application also provides a soft-pack battery cell stacking error prevention device, comprising:

[0023] The data acquisition module is used to collect the cell barcode, the module tray number carrying the cell, the test sequence of the cell in the module tray and the surface number of the soft-pack battery when the cell enters the soft-pack module production line and during the cell circulation process; the cell barcode includes the cell serial number, cell type, cell traceability information, and cell production date;

[0024] A data processing module is used to establish a battery cell data set, wherein the battery cell data set includes a memory battery cell barcode, a module tray number carrying the battery cell, and a test sequence number of the battery cell in the module tray; the memory battery cell barcode is a battery cell barcode collected when the battery cell is first put online;

[0025] A storage module, used for storing battery cell data sets;

[0026] The barcode comparison module is used to compare the cell barcode collected during cell circulation with the memory cell barcode; when there is a difference in the comparison result, the memory cell barcode is replaced with the collected cell barcode, and a processing prompt is sent at the same time;

[0027] The stack barcode establishment module is used to establish a stack barcode according to the battery cell data set; the stack barcode includes the soft-pack battery serial number, soft-pack battery type, soft-pack battery traceability information, soft-pack battery production date, and packaged battery cell information, and the packaged battery cell information includes packaged battery cell position information and packaged battery cell barcode information.

[0028] Furthermore, the data acquisition module collects the cell barcodes multiple times during the cell circulation process, and the barcode comparison module compares the multiple collected cell barcodes with the memory cell barcode. When there is a difference in the comparison result, the collected cell barcode is used to replace the memory cell barcode, and a processing prompt is sent at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A flowchart of a method for preventing errors in stacking soft-pack batteries;

[0030] Figure 2 The figure is a schematic diagram of the structure of a soft-pack battery cell stacking error prevention device. DETAILED DESCRIPTION

[0031] During the production process of soft-pack batteries, module trays are important tools for supporting and transporting batteries, ensuring the smooth progress of the production process and the quality of the batteries. In the same module tray, a corresponding number of soft-pack batteries are carried according to the design requirements of the soft-pack battery. When the soft-pack batteries have completed the production and testing steps, the soft-pack batteries in several trays are packaged to form a stack of soft-pack batteries.

[0032] In order to solve the problem that the cell barcode bound to the soft-pack stack is inconsistent with the cell barcode actually contained in the stack, and the production data of the soft-pack cell cannot be effectively recorded and traced, the present invention proposes a soft-pack cell stacking error prevention method and device, which is further described in detail through specific implementation methods below:

[0033] Embodiment 1

[0034] This embodiment provides a method for preventing errors in stacking soft-pack batteries. Figure 1 As shown, the following steps are included:

[0035] S1. Establish a cell data set for the cells entering the soft-pack module production line. The cell data set includes a memory cell barcode, a module tray number carrying the cell, and a test sequence number of the cell in the module tray;

[0036] The cells to be tested that enter the soft-pack module production line will be placed in the module tray in turn and circulate in the production line. The module tray is provided with an identification device, and the control program communicates with the identification device to obtain the number information of the module tray. The identification device of the module tray can adopt an image recognition device or RFID technology. In this embodiment, RFID technology is used to identify the module tray number.

[0037] The control program simultaneously obtains the cell barcode of each battery cell through the barcode reading device, and starts from identifying the module tray number, and numbers each battery cell in the module tray according to the test sequence, and integrates the barcode of the battery cell, the module tray number carrying the battery cell, and the test sequence number of the battery cell to establish a battery cell data set. Among them, the identification mark on the battery cell can be a QR code, barcode or digital code, including battery cell serial number, battery cell type, battery cell traceability information, battery cell production date and other information. When establishing a battery cell data set, the recorded battery cell barcode is called a memory battery cell barcode. The barcode reading device can use an image recognition device, such as a camera or a code scanning device.

[0038] In this embodiment, the identification mark on the battery cell adopts a QR code, and the barcode reading device adopts a barcode scanning device. The barcode scanning device can be fixed, and the battery cells on the module tray pass through the barcode scanning device in sequence; or the barcode scanning device can automatically move to scan all the battery cells in the module tray.

[0039] The control program is stored in the controller, and the controller can be implemented by PLC, FPGA or industrial computer. In this embodiment, PLC is adopted.

[0040] S2. Obtain and collect cell barcodes for cells circulating in the soft-pack module production line according to the module tray number carrying the cell and the test sequence number of the cell in the module tray;

[0041] When the battery cell is being tested in the soft pack module production line, the battery cell barcode is collected for the circulating battery cell. Similar to the step of S1, the control program determines the module tray number information through communication with the identification device, and the control program retrieves the battery cell data set and obtains the corresponding memory battery cell barcode according to the tray number information and the test sequence number information. The barcode reader collects the actual battery cell barcode of each battery cell in the module tray.

[0042] S3, comparing the collected cell barcode with the memory cell barcode, if there is a difference in the comparison results, using the collected cell barcode to replace the memory cell barcode;

[0043] During the cell testing process, the production line may be overhauled and maintained due to equipment software failure, or the performance test of the cell may fail and become a NG product, which needs to be replaced by manual selection of good products. During these processes, the cell test sequence on the module tray may change, or the actual cells carried in the module tray may change, resulting in the position and barcode of the cell after packaging being inconsistent with the recorded data at the time of going online. At this time, error correction is performed by comparing the collected cell barcode with the memorized cell barcode.

[0044] For example, the cell data set contains the record item of module tray number 09, test sequence number 12, and cell barcode A, which means that the 12th cell tested on module tray No. 09 is barcode A; after the cell is processed and tested on the production line, the control program identifies module tray No. 09 and retrieves the cell data set to obtain the record item of module tray number 09, test sequence number 12, and the memory cell barcode is A, while the cell barcode actually obtained by the barcode reader is B. At this time, A and B are compared. If A and B are the same, it means that the cell has not changed position or NG replacement during the circulation process; if A and B are different, it means that the cell has changed position or NG replacement. In both cases, the memory cell barcode in the cell data set needs to be updated, and A is replaced with B.

[0045] When there are differences in the comparison results, the control software will send a processing prompt to remind manual processing.

[0046] S4, establishing a stack barcode according to the battery cell data set;

[0047] Since the updated cell data set is consistent with the actual barcode information and positional relationship of all cells in the module tray, a stack barcode is established based on the cell data set before soft-pack packaging, that is, the barcode information of the finished soft-pack battery.

[0048] The stack barcode includes the soft-pack battery serial number, soft-pack battery type, soft-pack battery traceability information, soft-pack battery production date, and packaged battery cell information, wherein the packaged battery cell information includes the position information and barcode information of all soft-pack battery cells in the aluminum-plastic film package. At the same time, a corresponding relationship is established between the packaged battery cells and the record items of each battery cell in the battery cell data set, so that a complete data set including the battery cell barcode, the arrangement position of the battery cell in the stack, and the test data of the battery cell in the module production line can be established, thereby realizing the effective recording and accurate tracing of the soft-pack battery cell production data.

[0049] Embodiment 2

[0050] The difference between this embodiment and the first embodiment is that, since the module production line includes multiple processes, in order to further improve the error prevention capability of stacking battery cells, multiple error prevention steps are set in the error prevention method.

[0051] For example, a cell data set is generated when the cell enters the module production line, and the stacking cell error prevention method as described in Example 1 is set after the cell performance test process of the module production line to obtain a first collected cell barcode, and the first collected cell barcode is used to compare and update the memory cell barcode; after the surface spraying process of the module production line, the stacking cell error prevention method as described in Example 1 is set to obtain a second collected cell barcode, and the second collected cell barcode is used to compare and update the memory cell barcode again.

[0052] The above description is only an example. The number of steps in the cell stacking error prevention method can be appropriately increased according to the actual situation of the module production line and the error prevention requirements.

[0053] Embodiment 3

[0054] This embodiment provides a soft-pack battery cell stacking error prevention device, such as Figure 2 As shown, including:

[0055] The data acquisition module is used to collect the cell barcode, the module tray number carrying the cell, the test sequence of the cell in the module tray and the surface number of the soft-pack battery when the cell enters the soft-pack module production line and during the cell circulation process; the cell barcode includes the cell serial number, cell type, cell traceability information, and cell production date;

[0056] A data processing module is used to establish a battery cell data set, wherein the battery cell data set includes a memory battery cell barcode, a module tray number carrying the battery cell, and a test sequence number of the battery cell in the module tray; the memory battery cell barcode is a battery cell barcode collected when the battery cell is first put online;

[0057] A storage module, used for storing battery cell data sets;

[0058] The barcode comparison module is used to compare the cell barcode collected during cell circulation with the memory cell barcode; when there is a difference in the comparison result, the memory cell barcode is replaced with the collected cell barcode, and a processing prompt is sent at the same time;

[0059] The stack barcode establishment module is used to establish the stack barcode according to the battery cell data set. The stack barcode includes the soft-pack battery serial number, soft-pack battery type, soft-pack battery traceability information, soft-pack battery production date, and packaged battery cell information, wherein the packaged battery cell information includes the packaged battery cell position information and the packaged battery cell barcode information.

[0060] The specific working process of each module is as described in the previous embodiment.

[0061] Embodiment 4

[0062] The difference between this embodiment and the third embodiment is that when the battery cells circulate in the soft-pack module production line, the data acquisition module collects the battery cell barcodes for multiple times according to the carrying tray number and the test sequence number, the data processing module compares and updates the remembered battery cell barcodes based on each collected battery cell barcode, and the stack barcode establishment module establishes the stack barcode based on the final battery cell data set.

[0063] The above are only embodiments of the present invention. The invention is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for preventing errors in stacking soft-pack batteries, characterized in that: The following steps are involved: S1. Establish a cell data set for the cells entering the soft-pack module production line, wherein the cell data set includes a memory cell barcode, a module tray number carrying the cell, and a test sequence number of the cell in the module tray; S2. Obtain and collect cell barcodes for cells circulating in the soft-pack module production line according to the module tray number carrying the cell and the test sequence number of the cell in the module tray; S3, comparing the collected cell barcode with the memory cell barcode, if there is a difference in the comparison results, using the collected cell barcode to replace the memory cell barcode; S4. Create a stack barcode based on the battery cell data set.

2. A method for preventing errors in stacking soft-pack batteries according to claim 1, characterized in that: The test sequence number is determined according to the test sequence of the cells in the module tray.

3. A method for preventing errors in stacking soft-pack batteries according to claim 1, characterized in that: The collected cell barcode and the memorized cell barcode include the cell serial number, cell type, cell traceability information, and cell production date; the stacked body barcode includes the soft-pack battery serial number, soft-pack battery type, soft-pack battery traceability information, soft-pack battery production date, and packaged cell information.

4. A method for preventing errors in stacking soft-pack batteries according to claim 3, characterized in that: The packaged battery cell information includes packaged battery cell position information and packaged battery cell barcode information.

5. A method for preventing errors in stacking soft-pack batteries according to claim 4, characterized in that: The packaged battery cell position information is determined according to the arrangement position of the packaged battery cells in the stack.

6. A method for preventing errors in stacking soft-pack batteries according to claim 1, characterized in that: The module tray is provided with an identification device, and the control program communicates with the identification device to obtain the module tray number.

7. A method for preventing errors in stacking soft-pack batteries according to claim 1, characterized in that: In the step S2, multiple cell barcodes are collected for the cells with the same module tray number and the same test sequence number. In the step S3, the multiple collected cell barcodes are compared with the cell memory barcodes. When there is a difference in the comparison results, the collected cell barcodes are used to replace the memory cell barcodes.

8. The method for preventing errors in stacking soft-pack batteries according to claim 1, characterized in that: In the step S3, when there is a difference in the comparison result, a processing prompt is sent.

9. A soft-pack battery cell stacking error prevention device, characterized in that: include: The data acquisition module is used to collect the cell barcode, the module tray number carrying the cell, the test sequence of the cell in the module tray and the surface number of the soft-pack battery when the cell enters the soft-pack module production line and during the cell circulation process; the cell barcode includes the cell serial number, cell type, cell traceability information, and cell production date; A data processing module is used to establish a battery cell data set, wherein the battery cell data set includes a memory battery cell barcode, a module tray number carrying the battery cell, and a test sequence number of the battery cell in the module tray; the memory battery cell barcode is a battery cell barcode collected when the battery cell is first put online; A storage module, used for storing battery cell data sets; The barcode comparison module is used to compare the cell barcode collected during cell circulation with the memory cell barcode; when there is a difference in the comparison result, the memory cell barcode is replaced with the collected cell barcode, and a processing prompt is sent at the same time; The stack barcode establishment module is used to establish a stack barcode according to the battery cell data set; the stack barcode includes the soft-pack battery serial number, soft-pack battery type, soft-pack battery traceability information, soft-pack battery production date, and packaged battery cell information, and the packaged battery cell information includes packaged battery cell position information and packaged battery cell barcode information.

10. The soft-pack battery cell stacking error prevention device according to claim 9, characterized in that: The data acquisition module collects the cell barcodes multiple times during the cell circulation process, and the barcode comparison module compares the multiple collected cell barcodes with the memory cell barcode. When there is a difference in the comparison result, the collected cell barcode is used to replace the memory cell barcode, and a processing prompt is sent at the same time.

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