Optimization method for controlling battery pre-charging time after assembly

Abstract

The present invention relates to a method for optimizing the control of pre-charging time of batteries after assembly, which is characterized in that: two time nodes and a code scanning test are added during the pre-charging process of the batteries after assembly, and the corresponding information of the time nodes are collected respectively. After the system statistically analyzes the time difference of the collected time nodes, it finally calculates the time result value, and determines whether it is within the specified range, so as to control the time interval from the start of cleaning to the start of pre-charging. Beneficial effect: In the production test process from the start of cleaning to the end of pre-charging after the assembly of the battery of the present invention, by introducing two time nodes and performing time sampling, analysis and statistics on them, and using the system to assist in the control of important nodes, it replaces the manual paper records of each process, effectively improving the production efficiency and reducing the cost of process errors.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery production, and in particular relates to a method for optimizing the pre-charging time control of a battery after assembly. Background Art

[0002] At present, in the production process of cylindrical lithium-ion batteries, the batteries need to be pre-charged within a certain period of time after battery assembly to prevent corrosion of the inner wall of the battery shell and potential self-discharge hazards. During this production process, the battery needs to perform the following operations in sequence, including battery cleaning, heat shrinking, coding, automatic unloading and loading, transportation, pre-charging and other processes, and then stand for a certain period of time for subsequent normal battery formation. The operation process is as follows: assembled battery → cleaning → heat shrinking → coding → automatic unloading and loading → transportation → pre-charging → standing → formation. It can be seen from the operation process that the time interval from the start of cleaning to the start of pre-charging needs to be controlled during this operation. The existing operation method monitors time through manual recording and observation. This time monitoring method can only trace a single time node by querying the production record time of the pre-charging equipment, and cannot effectively count the complete process time, so it is not conducive to the continuous operation of on-site operators, the improvement of production efficiency and the quality control of products. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned technology and to provide a method for optimizing the control of the pre-charging time of the battery after assembly. During the production test process, by adding two time nodes and sampling, analyzing and counting the corresponding times, and by performing statistical analysis on the time difference of the time nodes, the pre-charging time after assembly can be effectively controlled.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a method for optimizing the control of the pre-charging time of the battery after assembly, adding two time nodes and a code scanning test in the process of pre-charging the battery after assembly, respectively collecting the corresponding information of the time nodes, and the system statistically analyzes the time difference of the collected time nodes, and finally calculates the time result value, and judges whether it is within the specified range, so as to control the time interval from the start of cleaning to the start of pre-charging, and the specific steps are as follows:

[0005] 1) The process of the pre-charging production line for assembled batteries includes the transfer of assembled batteries - cleaning - cleaning and heat shrinking - coding - unloading and loading + barcode scanning - transportation and transfer - pre-charging + barcode scanning - standing - normal pre-forming;

[0006] 2) Establish a first time node T1 in the "unloading and loading + barcode scanning" link in the above process, and establish a second time node T2 in the "pre-charging + barcode scanning" link in the above process;

[0007] 3) Establish the first time node T1: change the time point of entering cleaning to the end time point of unloading and loading, set the time period from cleaning to unloading and loading as X1, add an online code scanning test, scan the barcode of the tray, bind the code number information corresponding to the 256 batteries in the whole tray, and record the scanning time, set it as the time X2 of unloading and loading, and use it as the first time node T1;

[0008] 4) Establishing the second time node T2: When the battery enters the pre-charging process, the complete process information data of the start time and end time of each pallet entering the pre-charging process is recorded and generated in units of pallets, and the end time corresponding to the pallet is X3, which is used as the second time node T2;

[0009] 5) Time control of pre-formation of batteries after assembly: By querying the corresponding battery BOM and batch information, and calling the database result file of the charging and discharging equipment system, the pre-charge test data of the corresponding pallet is confirmed. After obtaining the corresponding information of time nodes X2 and X3, the system retrieves and compares the pallet information, calculates the control time result value of T=X3-X2, and determines whether T is within the specified requirements, so as to control the time of pre-formation after assembly.

[0010] Beneficial effect: Compared with the prior art, in the production test process from cleaning to pre-charging after the battery is assembled, the present invention introduces two time nodes and performs time sampling, analysis and statistics on them, and uses the system to assist in the management and control of important nodes, replacing manual paper records of each process, thereby effectively improving production efficiency and reducing process error loss costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the development and application of the optimization of the pre-charging time of the battery after assembly of the present invention;

[0012] Figure 2 It is a schematic diagram of the soft connection interface. DETAILED DESCRIPTION

[0013] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0014] See the attached figure for details. This embodiment provides a method for optimizing the control of the pre-charging time of the battery after assembly. Two time nodes and a code scanning test are added during the pre-charging process of the battery after assembly. The corresponding information of the time nodes is collected respectively. After the system statistically analyzes the time difference of the collected time nodes, it finally calculates the time result value and determines whether it is within the specified range. The time interval from the start of cleaning to the start of pre-charging can be controlled. The specific steps are as follows:

[0015] 1) The process of the pre-charging production line for assembled batteries includes the transfer of assembled batteries - cleaning - cleaning and heat shrinking - coding - unloading and loading + barcode scanning - transportation and transfer - pre-charging + barcode scanning - standing - normal pre-forming;

[0016] 2) Establish a first time node T1 in the "unloading and loading + barcode scanning" link in the above process, and establish a second time node T2 in the "pre-charging + barcode scanning" link in the above process;

[0017] 3) Establish the first time node T1: change the time point of entering cleaning to the end time point of unloading and loading, set the time period from cleaning to unloading and loading as X1, add an online code scanning test, scan the barcode of the tray, bind the code number information corresponding to the 256 batteries in the whole tray, and record the scanning time, set it as the time X2 of unloading and loading, and use it as the first time node T1;

[0018] 4) Establishing the second time node T2: When the battery enters the pre-charging process, the complete process information data of the start time and end time of each pallet entering the pre-charging process is recorded and generated in units of pallets, and the end time corresponding to the pallet is X3, which is used as the second time node T2;

[0019] 5) Time control of battery pre-formation after assembly: In order to complete the specific X2 data collection of the above time node 1, the software is written in VB language, and the corresponding battery BOM, batch information, pallet number, and scanning time X2 are obtained by scanning the pallet information, and the information is stored in the database. After obtaining the corresponding information of the X2 and X3 time nodes, the software system can search and compare according to the pallet information, and analyze and determine whether the final calculated time result value of T=X3-X2 is within the specified range through data aggregation, so as to effectively control the pre-formation time after assembly.

[0020] The software implements the process. By scanning the pallet number, the system can disassemble the pallet information into BOM, work order, batch, pallet number, and the pre-formation data table corresponding to the pallet. For example: the pallet information is LR1865SS_ML0188_P_123_256. After the system disassembles it, the BOM is LR865SS, the work order is ML0188, the batch is P, the pallet number is 123, and the pre-formation data table corresponding to the pallet is TB_LR1865SS_ML0188_P_data. The code scanning time X2 is the system time of the computer where the software is installed. It is automatically obtained by the system and stored in the database. The software will automatically retrieve the corresponding pre-formation time X3 for the pallet data scanned during the shift of the day every minute. The system calculates T=X3-X2. The control time is 40 minutes, and the system determines whether it has timed out. For pallets that cannot retrieve pre-formation data after 30 minutes of code scanning time, an early warning prompt will be issued to prevent pre-formation timeout.

[0021] At the same time, the corresponding software system can also expand its functions on this basis. For example, when retrieving the X2 data of time node 1, the scanning and entry of the battery coding information in the pallet can be added to introduce new functions such as whether the coding information is correct, whether the battery information matches the current pallet information, and whether there is a coding error.

[0022] Since the system is used to assist in the management and control of important nodes, replacing manual paper records of each process, it effectively improves production efficiency and reduces process error loss costs, and is easy to promote and apply in manufacturing enterprises.

[0023] Example

[0024] The present invention redesigns two corresponding time nodes based on the original operation mode of transferring the batteries to cleaning, heat shrinking, coding and tray loading, and pre-formation testing after assembly according to actual production conditions. The scanning test is added online through production, and the corresponding time node collection is assisted by a self-built software system. Through the statistical analysis of the process time difference by the software, the pre-formation time after assembly is effectively controlled. The first time node T1 is changed from the time of transfer to cleaning to the end time point of unloading and loading, mainly considering the following aspects: First, the unloading and loading after cleaning to coding are all continuous assembly line operations, and there will be no time interval caused by pauses in the middle, that is, the time is controllable, and the corresponding time can be set as X1; second, the batteries transferred in for assembly are not coded themselves and are not convenient for recording. When the batteries are coded and unloading and loading are completed, since each pallet has 256 pieces, and the battery coding numbers are continuous and the barcode information of the corresponding pallet is generated, subsequent valid information inquiries can be carried out; third, the unloading pallets will be transferred in fixed units of 6 to 8 pallets. During this buffer period, other operations can be carried out simultaneously without affecting the production speed and efficiency. It is planned to add an online scanning test during this buffer time. By scanning the barcode of the pallet, the coding number information corresponding to the 256 batteries in the entire pallet can be bound. At the same time, the scanning time is recorded, which is the time for loading and unloading X2, and this is used as the first time node T1. When the battery is pre-charged in units of pallets according to the production process, the corresponding needle bed equipment will record the start time and end time of the process initiated by each pallet, and generate a unique result file at the end of the process, which contains complete process information data. In this process, the end time X3 corresponding to the pallet is set as the second time node T2. From the above, it can be seen that the control time is changed from the original T = X3-X1 to T = X3-X2, which is more conducive to control and traceability. The control standard corresponding to the specific time can be adjusted according to T-X1, which is convenient for on-site management. In order to complete the specific X3 data collection of the above time node T2, the corresponding battery BOM and batch information query can be used through the self-built software system to call the database result file of the charging and discharging equipment system, so as to timely and accurately confirm the pre-charge test data of the corresponding pallet. After obtaining the corresponding information of the time nodes X2 and X3, the software system can search and compare according to the pallet information, and analyze and determine whether the final calculated time result value of T = X3-X2 is within the specified range through data aggregation, so as to effectively control the pre-formation time after assembly. At the same time, the corresponding software system can also expand its functions on this basis. For example, when retrieving the X2 data of the first time node T1, the scanning and entry of the battery coding information in the pallet can be added to introduce new functions such as whether the coding information is correct, whether the battery information matches the current pallet information, and whether there is a coding error.Since the system is used to assist in the management and control of important nodes, replacing manual paper records of each process, it effectively improves production efficiency and reduces process error loss costs, and is easy to promote and apply in manufacturing enterprises.

[0025] The above-mentioned detailed description of the method for optimizing the pre-charging time of a battery after assembly with reference to the embodiment is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope. Therefore, changes and modifications without departing from the overall concept of the present invention should be within the scope of protection of the present invention.

Claims

1. A method for optimizing the pre-charging time control of a battery after assembly, characterized in that: During the battery pre-charging process after assembly, two time nodes and code scanning tests are added to collect the corresponding information of the time nodes. After statistical analysis of the time difference of the collected time nodes, the system finally calculates the time result value and determines whether it is within the specified range. The time interval from the start of cleaning to the start of pre-charging can be controlled. The specific steps are as follows: 1) The process of the pre-charging production line for assembled batteries includes the transfer of assembled batteries - cleaning - cleaning and heat shrinking - coding - unloading and loading + barcode scanning - transportation and transfer - pre-charging + barcode scanning - standing - normal pre-forming; 2) Establish a first time node T1 in the "unloading and loading + barcode scanning" link in the above process, and establish a second time node T2 in the "pre-charging + barcode scanning" link in the above process; 3) Establish the first time node T1: change the time point of entering cleaning to the end time point of unloading and loading, set the time period from cleaning to unloading and loading as X1, add an online code scanning test, scan the barcode of the tray, bind the code number information corresponding to the 256 batteries in the whole tray, and record the scanning time, set it as the time X2 of unloading and loading, and use it as the first time node T1; 4) Establishing the second time node T2: When the battery enters the pre-charging process, the complete process information data of the start time and end time of each pallet entering the pre-charging process is recorded and generated in units of pallets, and the end time X3 corresponding to the pallet is used as the second time node T2; 5) Time control of pre-formation of batteries after assembly: By querying the corresponding battery BOM and batch information, and calling the database result file of the charging and discharging equipment system, the pre-charge test data of the corresponding pallet is confirmed. After obtaining the corresponding information of time nodes X2 and X3, the system retrieves and compares the pallet information, calculates the control time result value of T=X3-X2, and determines whether T is within the specified requirements, so as to control the time of pre-formation after assembly.

Images