Liquid injection system and method for battery cell

Abstract

A liquid injection system and method for a battery cell. The liquid injection method for a battery cell is applicable to an upper-level computer, and comprises: in response to a battery cell to undergo liquid injection arriving at a liquid injection station, acquiring corresponding position memory information of the battery cell in a tray; determining an actual liquid preparation amount and a preset liquid preparation amount corresponding to a liquid injection mechanism deployed on the liquid injection station; and when the difference between the actual liquid preparation amount and the preset liquid preparation amount is less than or equal to a preset deviation value, acquiring liquid injection data of the battery cell, wherein the liquid injection data is obtained by the liquid injection mechanism when performing liquid injection on the battery cell on the basis of the actual liquid preparation amount and the position memory information.

Description

Battery cell injection system and method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on Chinese patent application number 202410175626.X, application date February 7, 2024, and invention name “Liquid injection system and method for battery cell”, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into the present disclosure as a reference. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular to a battery cell injection system and method. Background Art

[0004] In the related art, when the battery cell enters the liquid injection process for liquid injection, the actual liquid volume provided by the liquid injection mechanism usually deviates from the set liquid volume, and the size of the deviation value will affect the liquid injection data of the battery cell, thereby affecting the stability of the battery cell liquid injection.

[0005] Summary of the Invention

[0006] The present disclosure provides a battery cell injection system and method, aiming to improve the injection stability and efficiency of the battery cell.

[0007] The present disclosure provides a method for injecting liquid into a battery cell, which is applied to a host computer. The method includes:

[0008] In response to the battery cell to be injected arriving at the injection station, the position memory information corresponding to the battery cell in the tray is obtained; the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism deployed on the injection station are determined; when the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value, the injection data of the battery cell is obtained; wherein, the injection data is obtained by the injection mechanism when injecting the battery cell based on the actual reserve liquid volume and the position memory information.

[0009] Through the above scheme, on the one hand, when the deviation between the actual reserve liquid volume and the set reserve liquid volume of the injection mechanism meets a certain value, injection is carried out, which can improve the stability and efficiency of injection; on the other hand, a more specific battery cell position can be obtained through position memory information, further improving the injection efficiency and accuracy of the battery cell.

[0010] In the disclosed embodiment, in response to the battery cell to be injected arriving at the injection station, the position memory information corresponding to the battery cell in the tray is obtained, including: in response to the battery cell arriving at the injection station, obtaining the tray code of the tray; in a tray data table, determining the position memory information associated with the tray code; wherein, the tray data table is obtained when the battery cell is at a code scanning station, and the code scanning station is a station before the injection station.

[0011] Through the above solution, based on the obtained pallet code, its associated position memory information is obtained from the pre-stored pallet data table. This improves the efficiency of obtaining position memory information and provides parameter support for subsequent battery cell filling.

[0012] In the disclosed embodiment, in response to the battery cell arriving at the liquid filling station, obtaining the tray code of the tray includes: obtaining a liquid preparation code scanning signal sent by a controller in response to the battery cell arriving at the liquid filling station; and controlling a code scanning mechanism to scan the tray based on the liquid preparation code scanning signal to obtain the tray code. Through the above solution, based on the interaction between multiple devices, intelligent acquisition of the tray code can be achieved, thereby improving the efficiency of tray code acquisition.

[0013] In the embodiment of the present disclosure, determining the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism deployed on the injection station includes: receiving a reserve liquid signal carrying the set reserve liquid volume sent by a controller; based on the reserve liquid signal, controlling the injection mechanism to prepare liquid, and after the injection mechanism completes the preparation of liquid, determining the current reserve liquid volume of the injection mechanism read as the actual reserve liquid volume.

[0014] Through the above scheme, based on the corresponding reserve liquid signal, the set reserve liquid volume and the actual injection volume are obtained in sequence, which not only improves the efficiency and accuracy of the obtained set reserve liquid volume and actual injection volume, but also provides a parameter basis for subsequent battery cell injection.

[0015] In an embodiment of the present disclosure, the injection method further includes: in response to the battery cell being in a stationary position within the stationary mechanism, reading the stationary data of the battery cell; determining the injection data and the stationary data of the battery cell as process data of the battery cell during the injection process; wherein the stationary position is a position after the injection position. Through the above scheme, on the one hand, the battery cell can be sequentially transferred to multiple positions in the injection process, making the transportation of the battery cell intelligent; on the other hand, the parameters of the battery cell at different positions in the injection process can be obtained in real time to provide more comprehensive battery cell injection data.

[0016] In the disclosed embodiment, in response to the battery cell being transported to the resting station within the resting mechanism, reading the resting data of the battery cell includes: receiving a read signal from a controller in response to the battery cell being in the resting station for a preset time; and based on the read signal, reading the corresponding battery cell parameters after the resting time to obtain the resting data. Through the above scheme, the resting data of the battery cell being transported to the resting station can be obtained, thereby providing parameter support for subsequently obtaining more comprehensive injection data of the battery cell during the injection process.

[0017] In the embodiment of the present disclosure, the injection data includes at least: the injection rate, the injection time and the vacuuming time, the static data includes at least: the static time and the voltage parameters, and the injection method further includes: based on the cell code of the battery cell, writing the injection rate, the injection time, the vacuuming time, the static time and the voltage parameters into the battery cell data table to update the battery cell data table; wherein, the battery cell code is obtained when the battery cell is in the code reading station; the code reading station is the station before the injection station.

[0018] Through the above solution, the relevant data in the battery cell data table is updated in real time based on the battery cell code, so as to realize the storage of the process data of the battery cell in the liquid injection process, thereby providing parameter support for subsequent viewing or related operations on the battery cell.

[0019] In an embodiment of the present disclosure, in response to the battery cell to be injected arriving at the injection station, obtaining the position memory information corresponding to the battery cell in the tray includes: presenting an injection display interface; wherein the injection display interface includes an injection data box and a reserve liquid control; in response to the battery cell arriving at the injection station, displaying the position memory information corresponding to the battery cell in the tray in the injection data box; determining the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism deployed on the injection station includes: in response to triggering the reserve liquid control, displaying the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism in the injection data box; obtaining the injection data of the battery cell when the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value includes: in response to the difference between the actual reserve liquid volume and the set reserve liquid volume being less than or equal to the preset deviation value, displaying the injection data of the battery cell in the injection data box.

[0020] Through the above scheme, on the one hand, when the deviation between the actual reserve liquid volume and the set reserve liquid volume of the liquid injection mechanism meets a certain value, the liquid injection mechanism will display the injection data of the relevant battery cell accordingly while injecting liquid into the battery cell, which can improve the stability and efficiency of the liquid injection; on the other hand, a more specific battery cell position can be obtained through position memory information, further improving the liquid injection efficiency and accuracy of the battery cell.

[0021] In an embodiment of the present disclosure, the injection method further includes: in response to the battery cell being in a stationary position within the stationary mechanism, displaying the static data of the battery cell in the injection data frame; and displaying process data in the injection data frame; wherein the process data includes the injection data of the battery cell and the static data of the battery cell. Through the above solution, the injection data frame displays the injection data and static data of the battery cell respectively, which facilitates the operator of the host computer to promptly obtain the process data of the battery cell during the injection process and to promptly perform relevant analysis and operations based on the displayed data.

[0022] The present disclosure also provides a liquid injection system for a battery cell, the liquid injection system comprising: a host computer, a controller, and a liquid injection mechanism, wherein:

[0023] In response to the battery cell to be injected arriving at the injection station, the host computer obtains the position memory information corresponding to the battery cell in the tray under the action of the controller; the host computer determines the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism; when the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value, the host computer obtains the injection data of the battery cell; wherein, the injection data is obtained by the injection mechanism under the action of the controller, based on the actual reserve liquid volume and the position memory information, when injecting the battery cell.

[0024] The disclosed embodiment provides a method and system for injecting liquid into a battery cell, wherein, first, the position memory information of the battery cell to be injected that arrives at the injection station and is located in the tray carrying the battery cell is obtained, and the set liquid volume and actual liquid volume of the injection mechanism for injecting liquid into the battery cell at the injection station are determined; then, when the difference between the actual liquid volume and the set liquid volume is less than or equal to a preset deviation value, the injection data of the battery cell is obtained; wherein, the injection data is obtained by the injection mechanism injecting liquid into the battery cell based on the position memory information and the actual liquid volume. In this way, on the one hand, when the deviation between the actual liquid volume and the set liquid volume of the injection mechanism meets a certain value, the injection is performed, which can improve the stability and efficiency of the injection; on the other hand, a more specific battery cell position can be obtained through the position memory information, further improving the efficiency and accuracy of the battery cell injection.

[0025] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] FIG1 is a schematic diagram of a flow chart of a method for injecting liquid into a battery cell according to some embodiments of the present disclosure;

[0028] FIG2 is a second flow diagram of a method for injecting liquid into a battery cell according to some embodiments of the present disclosure;

[0029] FIG3 is a third flow diagram of a method for injecting liquid into a battery cell according to some embodiments of the present disclosure;

[0030] FIG4 is a fourth flow chart of a method for injecting liquid into a battery cell according to some embodiments of the present disclosure;

[0031] FIG5 is a fifth flow chart of a method for injecting liquid into a battery cell according to some embodiments of the present disclosure;

[0032] FIG6 is a schematic diagram of a liquid injection display interface according to some embodiments of the present disclosure;

[0033] FIG7 is a schematic diagram 1 of a liquid injection display interface corresponding to a host computer provided in an embodiment of the present disclosure;

[0034] FIG8 is a second schematic diagram of a liquid injection display interface corresponding to a host computer provided in an embodiment of the present disclosure;

[0035] FIG9 is a third schematic diagram of a liquid injection display interface corresponding to a host computer provided in an embodiment of the present disclosure;

[0036] FIG10 is a fourth schematic diagram of a liquid injection display interface corresponding to a host computer provided in an embodiment of the present disclosure;

[0037] FIG11 is a schematic diagram of the structure of a liquid injection system for a battery cell provided in some embodiments of the present disclosure;

[0038] FIG12 is a schematic diagram of an interaction between a liquid injection system and a code scanning system for implementing liquid injection in a battery cell according to some embodiments of the present disclosure;

[0039] FIG13 is a schematic diagram of an interaction of a liquid injection system for a battery cell according to some embodiments of the present disclosure to implement liquid preparation;

[0040] FIG14 is an interactive diagram of a liquid injection system for a battery cell according to some embodiments of the present disclosure for implementing liquid injection and reading liquid injection volume data;

[0041] FIG15 is an interactive schematic diagram of a liquid injection system for a battery cell provided in some embodiments of the present disclosure for reading data of the battery cell transported into a static chamber. DETAILED DESCRIPTION

[0042] To make the technical solutions and advantages of the embodiments of this application more clear, the specific technical solutions of this application will be further described in detail below in conjunction with the drawings in the embodiments of this application. The following embodiments are used to illustrate this application but are not intended to limit the scope of this application.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this application are only for describing the present embodiment and are not intended to limit this application.

[0044] In the following description, references to “some embodiments,” “this embodiment,” “this embodiment,” and examples, etc., describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0045] If similar descriptions of "first / second" appear in the application documents, the following explanation is added. In the following description, the terms "first\second\third" are merely used to distinguish similar objects and do not represent a specific order of the objects. It can be understood that "first\second\third" can be interchanged with the specific order or sequence where permitted, so that the present embodiment described here can be implemented in an order other than that illustrated or described here.

[0046] In the embodiments of the present disclosure, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, object A and / or object B may represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0047] At present, the application of new energy batteries in life and industry is becoming more and more extensive. New energy batteries are not only used in energy storage power supply systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as in aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding. In the embodiment of the present disclosure, the battery involved may be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, which can be used to make a battery module or battery pack, thereby being used to supply power to electrical devices. The battery cell may be a secondary battery, which refers to a battery cell that can continue to be used by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiment of the present disclosure is not limited to this.

[0048] In the embodiment of the present disclosure, the battery may also be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid through a busbar.

[0049] In the related art, liquid injection is a key process in the production process of lithium-ion batteries. The quality of the liquid injection results not only affects the battery performance, but also restricts the production efficiency of the battery. In the battery cell liquid injection process, the set liquid volume provided to the liquid injection pump deviates from the actual liquid volume parameter of the liquid injection pump. The size of the deviation value will affect the liquid injection data of the battery cell. For example: if the deviation between the set liquid volume and the actual liquid volume is too large, it is usually the upper computer of the liquid injection process that feeds back the information of the excessive deviation to the central control system corresponding to the battery cell liquid injection link to issue a corresponding alarm, so that the corresponding operator can check the cause, etc. In this way, the upper computer is relatively passive when the liquid injection is abnormal, that is, it cannot automatically execute the corresponding liquid injection or liquid injection alarm, etc., thereby affecting the stability of the battery cell liquid injection.

[0050] Based on the above problems, the embodiments of the present disclosure provide a method and system for injecting liquid into a battery cell, which improves the stability and efficiency of the injection by performing injection when the deviation between the actual reserve liquid volume and the set reserve liquid volume of the injection mechanism meets a certain value; and in the injection process, the injection is performed based on the position memory information of the battery cell on the tray carrying it, that is, the more specific battery cell position is used, which can further improve the injection efficiency and accuracy of the battery cell.

[0051] For the convenience of explanation, the following embodiments are described by taking a method for injecting liquid into a battery cell provided in some embodiments of the present disclosure as an example. The injection method is applied to a host computer. Referring to FIG1 , a flow chart of a method for injecting liquid into a battery cell provided in some embodiments of the present disclosure is shown. The following description is made in conjunction with FIG1 :

[0052] Step S101 : in response to a battery cell to be injected arriving at a injection station, obtaining memory information of a corresponding position of the battery cell in a tray.

[0053] In the disclosed embodiment, the injection station may be a station for injecting electrolyte into the battery cell; wherein the injection station may be equipped with an injection mechanism (injection pump) for injecting electrolyte into the battery cell. Here, the injection mechanism is generally a quantitative injection pump, which is equipped with a quantitative container for containing electrolyte.

[0054] In the disclosed embodiments, a tray is used to carry battery cells to be filled, i.e., cells undergoing the filling process. The tray may be provided with multiple slots for holding multiple battery cells (batteries). The cells held within the slots can be used for related operations such as filling, welding, or welding inspection. The slots on the tray are configured with shapes and sizes that match the battery cells or batteries.

[0055] In the embodiment of the present disclosure, the number of slots on the tray can be 8, 10, 32, etc. Here, the number of the slots can be determined according to the actual battery cell filling requirements; there is no limitation on this in the embodiment of the present disclosure.

[0056] In the embodiments of the present disclosure, the battery cells to be injected can refer to battery cells that require primary injection or secondary injection, and the embodiments of the present disclosure do not impose any restrictions on this. It should be noted that primary injection of battery cells is performed during the manufacturing process to maintain the stability of the battery cell capacity and provide protection for the battery cell life; while secondary injection is performed during the use of the battery cell to maintain the consistency of the battery cell capacity and extend the battery cell life.

[0057] In the embodiments of the present disclosure, the battery cell may refer to a battery cell of any shape, such as a square battery cell, a round battery cell, etc. And the battery cell generally refers to a battery cell (Battery Cell), which is one of the basic units that make up a battery. The battery cell is the core component of the battery, responsible for storing and releasing electrical energy. Here, the battery cell may be: a lithium-ion battery cell (Li-ion Cell), a lithium polymer battery cell (Li-polymer Cell), a nickel-metal hydride battery cell (NiMH Cell), etc. The embodiments of the present disclosure do not impose any restrictions on the type of battery cell, and the specific type can be selected according to the actual application scenario.

[0058] In the embodiment of the present disclosure, the battery cell is the core component of the battery pack, and a battery pack usually contains multiple battery cells, which are combined together to provide the required power capacity and voltage. Among them, the battery pack refers to a device composed of multiple battery cells, which is intended to store electrical energy and provide power supply. The components of the battery pack include at least: battery cells, battery management system (BMS), casing, connecting wiring harness, connectors and interfaces, etc. These components work together to combine the battery cells into a fully functional battery pack for various application scenarios. For example, the battery pack can be applied to electric vehicles, energy storage systems, portable electronic devices, solar energy systems, wind energy systems, emergency backup power supplies, power tools or electric bicycles, etc. The embodiment of the present disclosure does not impose any restrictions on this, and the specific selection can be made according to the actual application scenario.

[0059] In the disclosed embodiment, when the battery cells to be injected arrive at the injection station, a relevant battery cell transport mechanism may transport a tray carrying the battery cells to the injection station. Alternatively, a control system (controller) corresponding to the battery cells in the injection process may control the tray transport so that the battery cells to be injected arrive at the injection station; or the controller may control a relevant gripping mechanism to grip the battery cells to be injected from the previous station to the current injection station.

[0060] In the embodiment of the present disclosure, the number of battery cells to be injected with liquid may be one or more, and the embodiment of the present disclosure does not impose any limitation on this.

[0061] In the disclosed embodiments, the host computer may be an industrial computer (industrial control equipment); wherein the host computer may include a processor and a memory. Here, the memory may be used to store relevant programs running on the processor, and the processor may execute the battery cell injection method when running the program.

[0062] In the embodiment of the present disclosure, the host computer can exchange data with the controller; wherein the controller can be: a programmable logic controller (PLC) and the like.

[0063] In the disclosed embodiment, the host computer can first read the barcode of the tray under the action of the read signal sent by the controller, and then obtain the corresponding position memory information from the previously known tray data table based on the barcode. The position memory information can be generated when the battery cell is placed on the tray, and the battery cell is placed on the tray before reaching the injection station, so the host computer can obtain the position memory information from the relevant data generated in advance. In the disclosed embodiment, the position memory information corresponding to the battery cell in the tray can be represented by the corresponding slot number of the battery cell in the tray, etc.

[0064] It can be understood that through the above steps, the position memory information of the battery cell in the tray can be obtained, so as to provide a parameter basis for subsequent liquid injection based on the position memory information, thereby improving the stability and efficiency of the battery cell in the liquid injection process.

[0065] Step S102: determining the actual liquid reserve volume and the set liquid reserve volume corresponding to the liquid injection mechanism deployed at the liquid injection station.

[0066] In the embodiments of the present disclosure, the injection mechanism deployed at the injection station can be arranged corresponding to the battery cells located at the injection station, and the embodiments of the present disclosure are not limited to this. For example, the injection mechanism can be deployed directly above the injection station, or can be deployed to the side of the injection station and can be rotated at a preset angle to achieve injection of the battery cells located at the injection station.

[0067] In the disclosed embodiment, if the injection mechanism deployed at the injection station is eight parallel quantitative injection pumps, the eight battery cells to be injected at the injection station can be injected with electrolyte simultaneously. Here, the arrangement of the eight battery cells to be injected corresponds one-to-one to the positions of the eight quantitative injection pumps.

[0068] In the embodiments of the present disclosure, the amount of liquid reserve can be set differently according to the requirements of different battery cells. For example, for a 100Ah square aluminum shell battery, the amount of liquid injection corresponding to one injection is generally around 300g to 350g.

[0069] In the disclosed embodiment, the liquid injection mechanism is controlled to prepare liquid based on a set liquid volume, and after the liquid injection mechanism prepares liquid based on the set liquid volume, the actual liquid volume of the liquid injection mechanism is read. Here, during the actual cell filling process, the set liquid volume corresponding to the liquid injection mechanism and the actual liquid volume are usually different.

[0070] It should be noted that the target injection mechanism corresponding to the position memory information of the battery cell in the tray can be selected from multiple injection mechanisms to be selected deployed on the injection station, and then the actual reserve liquid volume and set reserve liquid volume of the target injection machine can be determined.

[0071] It can be understood that through the above steps, the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism are obtained, thereby providing a basis for subsequent identification based on the difference between the two, that is, whether the difference between the two is used to identify whether to directly inject the liquid or to perform alarm suspension and other processing.

[0072] Step S103 : when the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value, obtaining the injection data of the battery cell.

[0073] The injection data is obtained by the injection mechanism injecting liquid into the battery cell based on the actual reserve liquid volume and the position memory information.

[0074] In the disclosed embodiment, after obtaining the actual reserve liquid volume and the set reserve liquid volume, the host computer can compare the two to determine the deviation between the two. Here, if the deviation is less than or equal to the preset deviation value, the battery cell's injection data can be directly obtained; if the deviation is greater than the preset deviation value, an alarm signal can be issued accordingly.

[0075] In the embodiment of the present disclosure, the preset deviation value may be a pre-set value, such as 10g, etc. Its specific value may depend on the actual production requirements of the battery cell in the liquid injection process, and the embodiment of the present disclosure does not impose any limitation on this.

[0076] It should be noted that if the battery cell is injected with too much liquid during the injection process, it will easily cause the battery to bulge, resulting in uneven battery thickness; if the battery cell is injected with too little liquid during the injection process, the battery capacity and cycle times will be reduced, and the uneven injection amount of the battery cell will cause consistency differences in battery capacity and cycle performance. Therefore, it is very necessary to control the injection amount of the battery cell to meet the preset requirements.

[0077] In the embodiment of the present disclosure, it can be the injection port of the injection mechanism. Based on the position memory information, when the injection hole of the battery cell is aligned, the battery cell is injected according to the preset injection rate based on the actual reserve liquid volume to obtain injection data; wherein, the injection hole of the battery cell can be located on the battery top cover.

[0078] In the embodiment of the present disclosure, the injection data includes but is not limited to: the injection time corresponding to the battery cell, the actual reserve amount, the injection rate (here, the injection rate includes but is not limited to: the average injection rate of the entire injection process, the highest injection rate, the lowest injection rate), etc.

[0079] It can be understood that through the above scheme, on the one hand, when the deviation between the actual reserve liquid volume and the set reserve liquid volume of the injection mechanism meets a certain value, injection is carried out, which can improve the stability and efficiency of injection; on the other hand, a more specific battery cell position can be obtained through position memory information, further improving the injection efficiency and accuracy of the battery cell.

[0080] In some embodiments of the present disclosure, the acquisition of the position memory information in the above step S101 can be achieved by the following steps S201 and S202. Referring to FIG2 , which is a second flow diagram of the method for injecting liquid into a battery cell provided in some embodiments of the present disclosure, the following description is made in conjunction with FIG2 :

[0081] Step S201: In response to the battery cell arriving at the liquid injection station, obtaining a tray code of the tray.

[0082] In the embodiment of the present disclosure, when the battery cells to be injected arrive at the injection station, an image of the tray can be captured, and the tray code of the tray carrying the battery cells can be obtained by identifying the image obtained from the image capture.

[0083] In the embodiment of the present disclosure, the pallet code may be in the form of a barcode, a QR code, etc., and the present disclosure does not impose any limitation on this.

[0084] It should be noted that pallet codes are usually used in logistics, such as battery cell transportation management, to identify and track the loaded battery cells.

[0085] In the embodiment of the present disclosure, the pallet code may be a mark marked on the pallet, or may be a pallet code associated with the pallet stored in the host computer.

[0086] In the embodiment of the present disclosure, obtaining the pallet code in the above step S201 may include the following steps S2011 and S2012:

[0087] Step S2011: In response to the battery cell arriving at the liquid filling station, obtaining a liquid preparation code scanning signal sent by a controller.

[0088] In the disclosed embodiment, a controller within the injection system in which the host computer is located sends a liquid preparation code scanning signal to the host computer upon detecting that a battery cell has arrived at the injection station. Here, a detector may be present at the injection station, which, upon detecting that a battery cell has arrived, sends an arrival signal to the controller, causing the controller to send the liquid preparation code scanning signal to the host computer.

[0089] Step S2012: Based on the liquid preparation scanning signal, control the scanning mechanism to scan the tray to obtain the tray code.

[0090] In the embodiment of the present disclosure, after receiving the liquid preparation scanning signal, the host computer can control the scanning mechanism to scan the pallet to obtain the pallet code. Here, the scanning mechanism can be deployed on the host computer, and the scanning mechanism can be a scanning gun.

[0091] It can be understood that, through the above steps, based on the interaction between multiple devices, the pallet code of the pallet can be intelligently acquired to improve the efficiency of acquiring the pallet code.

[0092] In the embodiment of the present disclosure, obtaining the pallet code in the above step S2012 may include the following steps A1 and A2:

[0093] Step A1: Based on the liquid preparation scanning signal, control the scanning mechanism to scan the tray to obtain the initial code of the tray.

[0094] Step A2: If the verification result corresponding to the initial code is successful, the initial code is determined as the pallet code.

[0095] In the disclosed embodiment, the scanning mechanism can be further controlled based on the acquired liquid preparation scanning signal to scan the pallet, and the initial code obtained by scanning can be verified, including but not limited to: verifying the format of the initial code and verifying the length of the initial code to obtain a corresponding verification result. Here, if the verification result is successful, the initial code can be determined as the pallet code.

[0096] Continuing with the above description, determining that the verification result corresponding to the initial pallet code is successful can mean that the format of the initial code is consistent with the format of the preset pallet code, and the length of the initial code is the same as the length of the preset pallet code. Here, the preset pallet code can be data pre-stored within the host computer.

[0097] It should be noted that, if the verification result corresponding to the initial code is a verification failure, the verification can be performed again, or a new initial code can be identified and obtained again and the verification can be performed again accordingly to avoid the possibility of verification errors or errors in the process of obtaining the initial code; or, if the verification result corresponding to the initial code is a verification failure, a verification failure signal or an alarm signal can be issued accordingly. Here, the verification failure signal can also be sent to the controller so that the controller can perform relevant operations accordingly, such as: shutting down (stopping the operation of the host computer, and / or stopping the operation of the controller itself, and / or stopping the operation of the code scanning mechanism) so that relevant staff can check the cause of the abnormality, etc.

[0098] It is understandable that, through the above steps, when the initial code of the pallet code is read, it is correspondingly verified to improve the accuracy of the pallet code obtained subsequently.

[0099] Step S202: Determine the location memory information associated with the pallet code in the pallet data table.

[0100] The tray data table is data obtained when the battery cell is in a code scanning station, and the code scanning station is a station before the liquid injection station.

[0101] In the disclosed embodiment, the position memory information can be determined from a previously stored or retrieved pallet data table based on the pallet code. Here, the pallet data table can be obtained by the host computer performing corresponding data reading at the code scanning station. During the liquid filling process, the battery cell is transported to the code scanning station and the liquid filling station in sequence.

[0102] In the disclosed embodiments, the filling station and the barcode reading station can be adjacent or separated. For example, there are other stations between the barcode scanning station and the filling station, such as a detection station, a weighing station, etc. Here, the barcode scanning station can be the first station where the battery cell enters the filling process.

[0103] It should be noted that the pallet data table may include relevant information of multiple pallets, wherein the relevant information of each pallet may include at least: pallet code, position memory information of the battery cells in the pallet, position mark of the pallet on the work station, etc.; wherein, the pallet code, position memory information and position mark of each pallet correspond one to one.

[0104] It is understood that through the above steps, the pallet code is obtained and its associated position memory information is obtained from the pallet data table. This improves the efficiency of obtaining position memory information and facilitates accurate positioning of the battery cell to be filled, providing parameter support for subsequent cell filling.

[0105] In some embodiments of the present disclosure, the determination of the actual reserve liquid volume and the set reserve liquid volume of the injection mechanism in the above step S102 can be achieved by the following steps S301 and S302. Figure 3 is a flow diagram of the injection method of the battery cell provided in some embodiments of the present disclosure. The following is explained in conjunction with Figure 3:

[0106] Step S301: receiving a liquid preparation signal carrying the set liquid preparation amount sent by a controller.

[0107] In the disclosed embodiment, upon detecting that a battery cell has arrived at a liquid injection station, a liquid preparation signal may be received from a controller for controlling a liquid injection mechanism to prepare liquid. The controller may exchange information with a host computer. The liquid injection system for injecting liquid into the battery cell may include at least a controller and a host computer, and may also include a code scanning mechanism, a liquid injection mechanism, and the like.

[0108] In the disclosed embodiment, the set amount of the reserve liquid may be determined according to the property parameters of the battery cell, such as the size and shape of the battery cell, etc. Here, the controller may determine the set amount of the reserve liquid based on the property parameters of the battery cell to be injected that are collected in advance.

[0109] Step S302: Based on the liquid preparation signal, control the liquid injection mechanism to prepare liquid, and after the liquid injection mechanism completes the liquid injection, determine the current liquid injection volume of the liquid injection mechanism as the actual liquid preparation volume.

[0110] In the embodiment of the present disclosure, the host computer controls the injection mechanism to prepare liquid based on the set liquid preparation volume carried internally based on the received liquid preparation signal, and after the liquid preparation of the injection mechanism is completed, reads the current liquid preparation volume of the injection mechanism and determines it as the actual liquid preparation volume.

[0111] It should be noted that there is usually a deviation between the actual amount of liquid preparation and the set amount of liquid preparation. Here, the number of liquid injection mechanisms can match the number of battery cells to be injected, so that the actual amount of liquid injection of each liquid injection mechanism can be the same or different.

[0112] In the embodiment of the present disclosure, it can be assumed that the amount of liquid injected into the liquid injection mechanism is empty before the liquid is prepared.

[0113] It can be understood that through the above steps, based on the corresponding reserve liquid signal, the set reserve liquid volume and the actual injection volume are obtained in sequence, which not only improves the efficiency and accuracy of the obtained set reserve liquid volume and actual injection volume, but also provides a parameter basis for subsequent battery cell injection.

[0114] In some embodiments of the present disclosure, after the battery cell is injected with electrolyte, it is necessary to place the injected battery cell on a static device for static rest so that the battery cell is fully infiltrated by the injected electrolyte. That is, the injection method provided in the above embodiment can also perform the following steps S401 and S402. Referring to Figure 4, which is a fourth flow chart of the injection method of the battery cell provided in some embodiments of the present disclosure, the following description is made in conjunction with Figure 4:

[0115] Step S401: In response to the battery cell being in a rest position in a rest mechanism, read rest data of the battery cell.

[0116] Wherein, the static station is a station located after the liquid injection station.

[0117] In the disclosed embodiments, the resting station can be adjacent to or remote from the injection station. Here, a cell transport mechanism can be used to transport the cells from the injection station to the resting station; or a controller corresponding to the cells during the injection process can be used to control the transport of the trays so that the injected cells can be transferred from the injection station to the resting station.

[0118] In the embodiment of the present disclosure, the static mechanism may be a vacuum box mechanism.

[0119] It should be noted that the electrolyte in lithium batteries conducts ions between the positive and negative electrodes, acting as a medium for charge and discharge, allowing the electrolyte to fully and evenly penetrate the interior of the lithium battery. Therefore, resting is a key step in the injection process; here, the battery cells (after injection) are transported to a resting station within the resting mechanism for rest, allowing them to be fully soaked with the injected electrolyte. It should be noted that the longer the resting time, the more complete the electrolyte penetration, and thus the better the battery performance and lifespan.

[0120] In the embodiment of the present disclosure, after the battery cell has been in the static station for a preset period of time, the static time and voltage parameters corresponding to the battery cell are read (here the voltage parameters of the battery cell can be used to represent the infiltration effect), and they are determined as the static data of the battery cell.

[0121] In the embodiment of the present disclosure, the number and layout of the static stations deployed in the static mechanism may be determined according to the actual production requirements of the battery cells.

[0122] In the embodiment of the present disclosure, obtaining the static data of the battery cell in the above step S401 may include the following steps S4011 and S4012:

[0123] Step S4011: In response to the time that the battery cell has been in the static position reaching a preset time, receiving a read signal sent by a controller.

[0124] In the embodiment of the present disclosure, the preset duration depends on the actual production requirements of the battery cell, which is associated with the attribute parameters of the battery cell (such as the size of the battery cell, the shape of the battery cell, etc.). For example, the preset duration is: 24h, 20h, etc.

[0125] Step S4012: Based on the read signal, read the cell parameters corresponding to the cell after being left at rest to obtain the rest data.

[0126] In the embodiment of the present disclosure, based on the acquired read signal, the corresponding cell parameters of the cell after the cell is left at rest for a preset time, ie, the rest data, are read.

[0127] Here, the rest data includes but is not limited to: rest time, voltage parameters. Here, the voltage parameters may be: the voltage value and internal resistance value of the battery cell measured at regular intervals during the rest time of the battery cell in the rest mechanism.

[0128] It can be understood that, through the above steps, the static data of the battery cells being transported to the static station can be obtained, thereby providing parameter support for the subsequent acquisition of more comprehensive process data of the battery cells in the liquid injection process.

[0129] Step S402 : determining process data of the battery cell in the liquid injection process based on the liquid injection data of the battery cell and the static data of the battery cell.

[0130] In the disclosed embodiment, the injection data and the static data can be used together as the process data of the battery cell during the injection process. Here, the process data of the battery cell during the injection process can be further obtained based on the difference between the data with the same attributes in the injection data and the static data, and the injection data and the static data.

[0131] It is understood that through the above steps, the static data corresponding to the battery cell is obtained, and this static data and the previously obtained injection data are simultaneously used as the process data of the battery cell during the injection process. In this way, on the one hand, the battery cell is sequentially transferred through multiple stations in the injection process, making the transportation of the battery cell intelligent; on the other hand, the parameters of the battery cell at different stations in the injection process can be obtained in real time, thereby providing more comprehensive battery cell injection data.

[0132] Continuing from the above description, the above-mentioned injection data includes at least: injection rate, injection time and vacuuming time, and the static data includes at least: static time and voltage parameters; correspondingly, after obtaining the above-mentioned injection data and static data of the battery cell, they can be stored in the battery cell data table corresponding to the production link (injection link) of the battery cell, that is, the injection method provided in the embodiment of the present disclosure can also perform the following step B:

[0133] Step B: Based on the cell code of the cell, write the injection rate, the injection time, the vacuuming time, the standing time and the voltage parameter into a cell data table to update the cell data table.

[0134] The cell code is obtained when the cell is in a code reading station; the code reading station is a station before the liquid injection station.

[0135] In the embodiment of the present disclosure, the cell code of the battery cell may be information obtained by reading the battery cell by a code reading mechanism when the battery cell is transported to the code reading station; here, the code reading station and the liquid injection station may be adjacent or far apart.

[0136] It should be noted that the number of cells included in the cell data table may vary depending on actual production. Here, the cell data table may include cell data acquired by the host computer within a preset time period; the preset time period may be one month, three months, etc., and the present disclosure does not impose any limitation on this.

[0137] In the disclosed embodiment, each cell in the cell data table corresponds to various process data of the cell in the injection process. Here, each cell in the cell data table corresponds to a cell code (read and stored by the code reading station), the tray code of the tray where the cell is located (read and stored by the code scanning station), the process data of the cell (obtained at the injection station and the static station), and the weighing data (the weight data corresponding to the first and last stations of the cell to be injected into the injection process).

[0138] In an embodiment of the present disclosure, based on the cell code of the battery cell, the obtained filling rate, filling time, vacuuming time, standing time and voltage parameters are correspondingly written into the area associated with the cell code in the battery cell data table to update the battery cell data table.

[0139] It can be understood that through the above steps, the relevant data in the battery cell data table is updated in real time based on the battery cell code to realize the storage of process data of the battery cell in the liquid injection process, thereby providing parameter support for subsequent viewing or related operations on the battery cell.

[0140] In some embodiments of the present disclosure, before the battery cell reaches the liquid injection station, a corresponding capping operation needs to be performed to cover part of the battery cell and leave only the liquid injection hole of the battery cell. That is, the liquid injection method provided in the above embodiment may further include the following steps C1 and C2:

[0141] Step C1: In response to the battery cell arriving at the capping station, receiving a capping signal sent by a controller.

[0142] Wherein, the capping station is a station located before the liquid injection station.

[0143] In the embodiment of the present disclosure, when the battery cell arrives at the capping station, the detector deployed at the capping station sends an arrival signal to the controller, so that the host computer receives the capping signal sent by the controller.

[0144] It should be noted that a tray carrying a plurality of battery cells may be transported to the capping station to trigger the controller to send a capping signal, and the capping signal is used to perform a capping operation on the plurality of battery cells in the tray.

[0145] Step C2: Based on the capping signal, control the mechanical gripper to grab the sleeve cup to perform a capping operation on the battery cells in the tray, so as to obtain the battery cells with injection holes, so as to inject liquid into the battery cells.

[0146] In the embodiment of the present disclosure, the sleeve cup is a tool that is set corresponding to the tray that carries the battery cells. Here, through the preset position relationship, the sleeve cup is placed above the battery cells in the tray, which can block the battery cells placed in the tray, leaving only the injection holes of the battery cells, providing convenience for subsequent battery cell injection. Among them, the preset position relationship can refer to the correspondence between the multiple card slots deployed on the tray and the multiple card slots deployed on the sleeve cup; illustratively, the tray is arranged with multiple card slots according to the preset layout rules, and correspondingly, the sleeve cup is also arranged with multiple card slots according to the preset layout rules.

[0147] In the disclosed embodiment, based on this capping signal, a mechanical gripper can be controlled to grab a set of cups and cap the battery cells on the tray, leaving only the injection holes exposed when the battery cells are transported to the subsequent injection station. The capping operation protects the internal structure of the battery cells, preventing them from being corroded and damaged by external substances (such as the electrolyte in the subsequent injection process), thereby improving the safety and stability of the battery cells during the injection process.

[0148] It is understood that through the above steps, based on the capping operation at the capping station, the battery cell is transported to the subsequent liquid filling station to display the corresponding liquid filling hole so that the liquid filling mechanism can inject liquid into it. In this way, the corrosion and damage of the electrolyte to the battery cell during the liquid filling process can be reduced, and the safety and stability of the battery cell during the subsequent liquid filling process can be improved.

[0149] Here, in the battery cell injection method provided in the embodiments of the present disclosure, when the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value, the injection mechanism will correspondingly inject the battery cell based on the actual reserve liquid volume and position memory information; correspondingly, if the difference between the actual reserve liquid volume and the set reserve liquid volume is greater than the preset deviation value, an alarm signal or an abnormal signal can be correspondingly issued, or an abnormal signal can be triggered to a controller in the injection system of the host computer, so that the controller performs a corresponding shutdown operation, etc. The embodiments of the present disclosure do not impose any limitations on this.

[0150] Correspondingly, the host computer can present a liquid injection display interface, which can be used to display multiple information involved in the above-mentioned embodiments, such as: the position memory information corresponding to the battery cell in the tray, the actual reserve liquid volume and the set reserve liquid volume corresponding to the liquid injection mechanism, etc. Correspondingly, steps S101 to S104 provided in the above-mentioned embodiments can be implemented by following steps S501 to S504. Please refer to Figure 5, which is a flow chart of the liquid injection method of the battery cell provided in some embodiments of the present disclosure. The following is explained in conjunction with Figure 5:

[0151] Step S501: presenting a liquid injection display interface.

[0152] Wherein, the injection display interface includes an injection data frame and a liquid preparation control.

[0153] Step S502 : In response to the battery cell arriving at the liquid injection station, displaying the corresponding position memory information of the battery cell in the tray in the liquid injection data frame.

[0154] Step S503: In response to the triggering of the liquid preparation control, the actual liquid preparation volume and the set liquid preparation volume corresponding to the liquid injection mechanism are displayed in the liquid injection data frame.

[0155] Step S504 : In response to the difference between the actual reserve liquid volume and the set reserve liquid volume being less than or equal to a preset deviation value, displaying the injection data of the battery cell in the injection data frame.

[0156] In the embodiment of the present disclosure, the presentation form of the injection data box and the liquid preparation control included in the injection display interface can be determined according to actual needs; illustratively, the injection data box is displayed in a table form or a curve form, and the liquid preparation control is displayed as a preset icon.

[0157] In the embodiment of the present disclosure, the injection data box and the reserve liquid control can be displayed synchronously on the injection display interface, displayed in different areas, or displayed in different pages, and can be switched accordingly through manual click operations or trigger operations to display the injection data box or the reserve liquid control.

[0158] It should be noted that the injection display interface includes but is not limited to the above-mentioned injection data box and liquid preparation control, and can also display the schematic architecture diagram of the host computer in different dimensions (three-dimensional and / or two-dimensional).

[0159] In the embodiment of the present disclosure, for the specific implementation of the above steps S501 to S504, reference may be made to the detailed description of the above-mentioned method for injecting liquid into the battery cell.

[0160] Here, please refer to Figure 6, which is a schematic diagram of a liquid filling display interface shown in some embodiments of the present disclosure, wherein the liquid filling display interface 601 includes: a liquid filling data box 6011 and a liquid preparation control 6012; here, Figure 6 is only an example, and the liquid filling display interface in the actual production process of the battery cell can be determined according to actual needs.

[0161] It can be understood that through the above steps, on the one hand, when the deviation between the actual reserve liquid volume and the set reserve liquid volume of the injection mechanism meets a certain value, the injection mechanism will display the injection data of the relevant battery cell accordingly while injecting liquid into the battery cell, which can improve the stability and efficiency of the injection; on the other hand, a more specific battery cell position can be obtained through position memory information, further improving the injection efficiency and accuracy of the battery cell.

[0162] Continuing from the above description, the injection method further comprises:

[0163] Step D1: In response to the battery cell being in a resting position in a resting mechanism, displaying resting data of the battery cell in the injection data frame.

[0164] Step D2: displaying process data in the injection data frame.

[0165] The process data includes injection data of the battery cell and static data of the battery cell.

[0166] In the embodiment of the present disclosure, the above-mentioned injection data at least include: injection rate, injection time and vacuuming time, and the said static data at least include: static time and voltage parameters.

[0167] Here, a cell data table can also be displayed on the liquid filling display interface. Correspondingly, the filling rate, filling time, vacuuming time, rest time, and voltage parameters can be written into the cell data table based on the cell code of the cell to update the displayed cell data table. The cell code is obtained when the cell is in the code reading station; the code reading station is the station before the liquid filling station.

[0168] In the embodiment of the present disclosure, the cell data table may be presented in another data frame in the liquid filling display interface, or may be presented in the liquid filling data frame, and the embodiment of the present disclosure does not impose any limitation on this.

[0169] It can be understood that through the above steps, the injection data and static data of the battery cell are displayed accordingly in the injection data box, which makes it convenient for the operator of the host computer to promptly know the process data of the battery cell in the injection process, and to perform relevant analysis and operations based on the displayed data in a timely manner.

[0170] Here, referring to FIG7 , there is shown a schematic diagram of a liquid injection display interface corresponding to a host computer provided in an embodiment of the present disclosure; wherein, the liquid injection display interface 700 may include: a function interface selection area 701; wherein, in the function interface selection area 701, when a trigger is received for a control corresponding to the main interface, the liquid injection display interface 700 may display: a three-dimensional schematic architecture display area 702 of the host computer, a log menu bar display area 703 corresponding to the host computer, and a status display area 704. Here, the status display area may display, for example: the connection status between the PLC communicating with the host computer, the code scanning status of the battery cell to be injected at the front end of the injection process, the Hipot test status, etc. In addition, the user login area for operating the host computer, i.e. 705, may also be presented on the liquid injection display interface 700.

[0171] Continuing with the above description, referring to FIG8 , there is shown a second schematic diagram of an injection display interface corresponding to a host computer provided in an embodiment of the present disclosure; wherein, within the function interface selection area 701 included in the injection display interface 700, upon receiving a trigger of a control corresponding to the injection interface, the following can be displayed on the injection display interface 700: a function selection display area 801 for the injection mechanism and an injection volume curve display area 802, etc. In this way, the real-time injection data of the injection link can be displayed in the form of a curve on the injection display interface.

[0172] Similarly, referring to FIG9 , which is a third schematic diagram of a liquid injection display interface corresponding to a host computer provided in an embodiment of the present disclosure, within the function interface selection area 701 included in the liquid injection display interface 700, upon receiving a trigger for a control corresponding to the liquid injection pump, the liquid injection display interface 700 may display: liquid injection parameter display controls and a function menu display area 901, as well as a debug log information display area 902. This allows the operator of the host computer to manually select liquid injection-related displays, view the liquid injection log, and save it.

[0173] In addition, referring to FIG10 , there is shown a fourth schematic diagram of an injection display interface corresponding to a host computer provided in an embodiment of the present disclosure; wherein, within the function interface selection area 701 included in the injection display interface 700, when a trigger for a control for relevant device parameters is received, the following can be displayed on the injection display interface 700: a device parameter setting display area 1001, an injection link parameter setting display area 1002, and a host computer task management touch area 1003, so that the operator can set the parameters of the injection link, etc.

[0174] Correspondingly, some embodiments of the present disclosure further provide a liquid injection system for a battery cell, as shown in FIG11 , which is a schematic diagram of the composition structure of the liquid injection system for a battery cell provided in some embodiments of the present disclosure. The liquid injection system 1100 includes: a host computer 1101, a controller 1102, and a liquid injection mechanism 1103, wherein:

[0175] In response to the battery cell to be injected arriving at the injection station, the host computer 1101 acquires the corresponding position memory information of the battery cell in the tray under the action of the controller 1102;

[0176] The host computer 1101 determines the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism 1103;

[0177] When the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to the preset deviation value, the host computer 1101 obtains the injection data of the battery cell;

[0178] The injection data is obtained by the injection mechanism 1103 injecting liquid into the battery cell under the action of the controller 1102 based on the actual reserve liquid volume and the position memory information.

[0179] In some embodiments of the present disclosure, the injection system 1100 can be applied to the injection method of the battery cell provided in any of the above embodiments. For detailed descriptions of the host computer 1101, the controller 1102, and the injection mechanism 1103, etc., please refer to the detailed descriptions of the above-mentioned battery cell injection method.

[0180] The following is an explanation of the battery cell injection system provided by the present disclosure using a specific embodiment. Here, the battery cell injection system includes: a controller, a host computer, a barcode scanner, an injection mechanism, etc.

[0181] Among them, when the battery cell is transported to the injection station in the injection process, the battery cell's injection system will correspondingly perform the following four processes: 1. Scan the injection code; 2. Prepare the liquid; 3. Inject the liquid and read the injection volume data; 4. Read the data of the battery cell transported to the static chamber.

[0182] 12 shows a liquid injection system for a battery cell, in which liquid injection and code scanning are implemented based on a controller 121, a host computer 122, and a code scanning gun 123, which specifically includes:

[0183] 1201, start;

[0184] 1202. The controller 121 sends a liquid injection code scanning trigger to the host computer 122. Here, the controller 121 may detect that the battery cell to be injected has arrived at the injection station and then send a liquid injection code scanning signal to the host computer 122.

[0185] 1203, host computer 122 reads the code scan trigger;

[0186] 1204. The host computer 122 sends a code scanning instruction to the code scanning gun 123. Here, the host computer 122 may send a trigger signal to the code scanning gun 123 based on the received injection code scanning;

[0187] 1205. The barcode scanner 123 scans the barcode. Here, the barcode scanner 123 scans the tray carrying the battery cells based on the received barcode scanning instruction to obtain the tray code (which may be a barcode) of the tray.

[0188] 1206. The host computer 122 verifies the pallet code scanned by the barcode scanner 123, that is, verifies whether the pallet code is qualified;

[0189] 1207. When the pallet code is qualified, the host computer 122 searches the previously obtained pallet data table for location memory information that matches the pallet code;

[0190] 1208. After querying the position memory information, the host computer 122 ends the liquid injection code scanning process.

[0191] It should be noted that during the liquid injection and code scanning process, each process executed by the host computer 122 will send a corresponding signal to the controller 121, so that the controller 121 can obtain the real-time workflow of the host computer 122 in real time. Here, if the tray code verification result of the host computer 122 is negative, that is, if the tray code verification fails, or if the location memory information is not queried, the host computer 122 will send a corresponding verification failure and no relevant information query signal to the controller 121.

[0192] Correspondingly, referring to FIG13 , the liquid preparation system of the battery cell is implemented based on the controller 121 , the host computer 122 and the liquid injection pump 124 (i.e., the liquid injection mechanism mentioned above), which specifically includes:

[0193] 1301, start;

[0194] 1302. The controller 121 sends a liquid preparation trigger to the host computer 122. Here, the controller 121 may detect that the battery cell to be filled with liquid arrives at the filling station and sends a liquid preparation signal to the host computer 122.

[0195] 1303, the host computer 122 reads the liquid preparation trigger;

[0196] 1304. The host computer 122 carries a set amount of prepared liquid based on the prepared liquid trigger, and sends the set amount of prepared liquid to the injection pump 124 corresponding to the injection station;

[0197] 1305, liquid injection, after receiving the set liquid volume, 124 prepares the liquid;

[0198] 1306. The host computer 122 may send a signal for reading the actual amount of prepared liquid to the injection pump 124 to read the current amount of liquid injected by the injection pump 124. Here, the host computer 122 may send the signal for reading the actual amount of prepared liquid correspondingly after sending the set amount of prepared liquid to the injection pump for a period of time.

[0199] 1307. The injection pump 124 sends the actual amount of prepared liquid to the host computer 122;

[0200] 1308. The host computer 122 compares the difference between the set reserve liquid volume and the actual reserve liquid volume to see if it is less than or equal to the preset deviation. If the difference is less than or equal to the preset deviation, the controller 121 can subsequently control the injection pump 124 to inject liquid into the battery cell; if the difference is greater than the preset deviation, a corresponding alarm signal is issued.

[0201] 1309. When the deviation is less than or equal to the preset deviation, the liquid preparation step can be ended accordingly, so that the host computer 122 can enter the next step.

[0202] It should be noted that during the liquid preparation process, each process executed by the host computer 122 will send a corresponding signal to the controller 121, so that the controller 121 can obtain real-time working data of the host computer 122. Here, if the deviation between the set liquid preparation volume and the actual liquid preparation volume is greater than the preset deviation, the host computer 122 can also send a corresponding liquid preparation failure signal to the controller 121.

[0203] Correspondingly, referring to FIG14 , in the liquid injection system of the battery cell, liquid injection and reading of liquid injection amount data are implemented based on the controller 121 and the host computer 122, which specifically includes:

[0204] 1401, start;

[0205] 1402, the controller 121 sends the injection volume data trigger to the host computer 122;

[0206] 1403. The host computer 122 reads the injection volume data trigger signal sent by the controller 121;

[0207] 1404. The host computer 122 acquires data of the battery cell during the liquid filling process based on the previously known battery cell code, pallet barcode, etc., that is, reads the liquid filling amount data;

[0208] 1405. The host computer 122 stores the read liquid filling amount data, that is, stores the liquid filling amount data of all the battery cells in the tray in a database;

[0209] 1406. End.

[0210] Here, when reading the injection volume data during the injection process, each process executed by the host computer 122 will correspondingly send a signal to the controller 121, so that the controller 121 can obtain the real-time working data of the host computer 122 in real time.

[0211] Correspondingly, referring to FIG15 , in the liquid injection system of the battery cell, the controller 121 and the host computer 122 are used to read the data of the battery cell transported to the static chamber, which specifically includes:

[0212] 1501, start;

[0213] 1502. The controller 121 sends a static cavity data trigger to the host computer 122.

[0214] 1503. The host computer 122 reads the static cavity data sent by the controller 121 and triggers the trigger;

[0215] 1504. The host computer 122 is triggered based on the received static cavity data to read the data of the battery cells in the static cavity;

[0216] 1505. The host computer 122 stores the read data of the battery cells in the static cavity, that is, stores the static cavity data of all battery cells in the tray in a database;

[0217] 1506. End.

[0218] Here, in the data flow of reading the battery cells transported to the static chamber, the host computer 122 also sends a signal to the controller 121 for each process executed, so that the controller 121 can obtain the real-time working data of the host computer 122 in real time.

[0219] Here, for further detailed implementation process, reference may be made to the detailed description of the liquid injection method for the battery cell in the above embodiment, which will not be repeated here.

[0220] Some embodiments of the present disclosure further provide a computer-readable storage medium storing a computer program, which, when executed by at least one processor, implements the method for injecting liquid into a battery cell as described in any one of the above embodiments.

[0221] It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present disclosure. Therefore, “in one embodiment” or “in one embodiment” appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present disclosure, the size of the serial numbers of the above-mentioned steps / processes does not mean the order of execution. The execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present disclosure. The serial numbers of the above-mentioned embodiments of the present disclosure are for description only and do not represent the advantages and disadvantages of the embodiments.

[0222] The present disclosure uses descriptions of directions or positional relationships indicated by “upper”, “lower”, “top”, “bottom”, “front”, “back”, “inside” and “outside”, etc., which are only for the convenience of describing the present disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as limiting the scope of protection of the present disclosure.

[0223] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure depending on the specific circumstances.

[0224] It should be noted that, in this disclosure, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0225] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device implementation methods described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0226] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, the functional units in each embodiment of the present disclosure may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0227] The above are only implementation methods of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or replacements that can be easily conceived by any technician familiar with this technical field within the technical scope disclosed in this disclosure should be covered by the protection scope of the present disclosure. Industrial Applicability

[0228] The disclosed embodiment provides a method and system for injecting liquid into a battery cell, wherein, first, the position memory information of the battery cell to be injected that arrives at the injection station and is located in the tray carrying the battery cell is obtained, and the set liquid volume and actual liquid volume of the injection mechanism for injecting liquid into the battery cell at the injection station are determined; then, when the difference between the actual liquid volume and the set liquid volume is less than or equal to a preset deviation value, the injection data of the battery cell is obtained; wherein, the injection data is obtained by the injection mechanism injecting liquid into the battery cell based on the position memory information and the actual liquid volume. In this way, on the one hand, when the deviation between the actual liquid volume and the set liquid volume of the injection mechanism meets a certain value, the injection is performed, which can improve the stability and efficiency of the injection; on the other hand, a more specific battery cell position can be obtained through the position memory information, further improving the efficiency and accuracy of the battery cell injection.

Claims

1. A method for injecting liquid into a battery cell, applied to a host computer, comprising: In response to the battery cell to be injected arriving at the injection station, obtaining the corresponding position memory information of the battery cell in the tray; Determine the actual liquid preparation volume and the set liquid preparation volume corresponding to the liquid injection mechanism deployed at the liquid injection station; When the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value, obtaining the injection data of the battery cell; The injection data is obtained by the injection mechanism injecting liquid into the battery cell based on the actual reserve liquid volume and the position memory information.

2. The liquid injection method according to claim 1, wherein: In response to the battery cell to be injected arriving at the injection station, obtaining the corresponding position memory information of the battery cell in the tray includes: In response to the battery cell arriving at the injection station, obtaining a tray code of the tray; In the pallet data table, determining the location memory information associated with the pallet code; The tray data table is obtained when the battery cell is in a code scanning station, and the code scanning station is a station before the liquid injection station.

3. The liquid injection method according to claim 2, wherein: In response to the battery cell arriving at the injection station, obtaining the tray code of the tray includes: In response to the battery cell arriving at the liquid filling station, obtaining a liquid preparation code scanning signal sent by a controller; Based on the liquid preparation scanning signal, the scanning mechanism is controlled to scan the tray to obtain the tray code.

4. The liquid injection method according to any one of claims 1 to 3, wherein: The determining of the actual liquid reserve amount and the set liquid reserve amount corresponding to the liquid injection mechanism deployed at the liquid injection station includes: receiving a liquid preparation signal sent by a controller and carrying the set liquid preparation amount; Based on the liquid preparation signal, the liquid injection mechanism is controlled to prepare liquid, and after the liquid preparation of the liquid injection mechanism is completed, the current liquid preparation volume of the liquid injection mechanism is read and determined as the actual liquid preparation volume.

5. The liquid injection method according to any one of claims 1 to 4, wherein: The liquid injection method further comprises: In response to the battery cell being in a rest position in the rest mechanism, reading rest data of the battery cell; Determine the injection data of the battery cell and the static data of the battery cell as process data of the battery cell in the injection process; Wherein, the static station is a station located after the liquid injection station.

6. The liquid injection method according to claim 5, wherein: In response to the battery cell being in a stationary position in a stationary mechanism, reading the stationary data of the battery cell includes: In response to the battery cell being in the static position for a predetermined period of time, receiving a read signal sent by a controller; Based on the read signal, the cell parameters corresponding to the cell after being left at rest are read to obtain the rest data.

7. The liquid injection method according to claim 6, wherein: The injection data at least includes: injection rate, injection time and vacuum time; the static data at least includes: static time and voltage parameters; the injection method further includes: Based on the cell code of the cell, the injection rate, the injection time, the vacuuming time, the rest time and the voltage parameter are written into a cell data table to update the cell data table; The cell code is obtained when the cell is in a code reading station; the code reading station is a station before the liquid injection station.

8. The liquid injection method according to any one of claims 1 to 7, wherein: In response to the battery cell to be injected arriving at the injection station, obtaining the corresponding position memory information of the battery cell in the tray includes: Presenting a liquid injection display interface; wherein the liquid injection display interface includes a liquid injection data box and a liquid preparation control; In response to the battery cell arriving at the liquid injection station, displaying the corresponding position memory information of the battery cell in the tray in the liquid injection data frame; The determining of the actual liquid reserve amount and the set liquid reserve amount corresponding to the liquid injection mechanism deployed at the liquid injection station includes: In response to triggering the liquid preparation control, the actual liquid preparation volume and the set liquid preparation volume corresponding to the liquid injection mechanism are displayed in the liquid injection data frame; When the difference between the actual reserve liquid amount and the set reserve liquid amount is less than or equal to a preset deviation value, obtaining the injection data of the battery cell includes: In response to a difference between the actual reserve liquid volume and the set reserve liquid volume being less than or equal to a preset deviation value, the injection data of the battery cell is displayed in the injection data frame.

9. The liquid injection method according to claim 8, wherein: The liquid injection method further comprises: In response to the battery cell being in a stationary position in the stationary mechanism, displaying the stationary data of the battery cell in the injection data frame; displaying process data in the injection data frame; The process data includes injection data of the battery cell and static data of the battery cell.

10. A liquid injection system for a battery cell, comprising: Host computer, controller, injection mechanism, including: In response to the battery cell to be injected arriving at the injection station, the host computer acquires the corresponding position memory information of the battery cell in the tray under the action of the controller; The host computer determines the actual reserve liquid volume and the set reserve liquid volume corresponding to the injection mechanism; When the difference between the actual reserve liquid volume and the set reserve liquid volume is less than or equal to a preset deviation value, the host computer obtains the injection data of the battery cell; The injection data is obtained by the injection mechanism, under the action of the controller, injecting liquid into the battery cell based on the actual reserve liquid volume and the position memory information.

11. The liquid injection system according to claim 10, wherein: The host computer obtains the tray code of the tray in response to the battery cell arriving at the injection station; The host computer determines the position memory information associated with the pallet code in the pallet data table; The tray data table is obtained when the battery cell is in a code scanning station, and the code scanning station is a station before the liquid injection station.

12. The liquid injection system according to claim 11, wherein: The host computer obtains a liquid preparation code scanning signal sent by the controller in response to the battery cell arriving at the liquid filling station; The host computer controls the scanning mechanism to scan the tray based on the liquid preparation scanning signal to obtain the tray code.

13. The liquid injection system according to any one of claims 10 to 12, wherein: The host computer receives a liquid preparation signal sent by the controller and carrying the set liquid preparation amount; The host computer controls the liquid injection mechanism to prepare liquid based on the liquid preparation signal, and after the liquid injection mechanism completes the liquid preparation, determines the current liquid preparation volume of the liquid injection mechanism as the actual liquid preparation volume.

14. The liquid injection system according to any one of claims 10 to 13, wherein: The host computer reads the static data of the battery cell in response to the battery cell being in the static position in the static mechanism; The host computer determines the injection data of the battery cell and the static data of the battery cell as the process data of the battery cell in the injection process; Wherein, the static station is a station located after the liquid injection station.

15. The liquid injection system according to claim 14, wherein: The host computer receives a read signal sent by the controller in response to the battery cell being in the static position for a preset time period; The host computer reads the cell parameters corresponding to the cell after standing still based on the read signal, and obtains the Static data.

16. The liquid injection system according to claim 15, wherein: The injection data at least include: injection rate, injection time and vacuuming time; the static data at least include: static time and voltage parameters; The host computer writes the injection rate, the injection time, the vacuuming time, the standing time and the voltage parameter into a cell data table based on the cell code of the cell to update the cell data table; The cell code is obtained when the cell is in a code reading station; the code reading station is a station before the liquid injection station.

17. The liquid injection system according to any one of claims 10 to 16, wherein: The host computer presents a liquid injection display interface; wherein the liquid injection display interface includes a liquid injection data frame and a liquid preparation control; In response to the battery cell arriving at the injection station, the host computer displays the corresponding position memory information of the battery cell in the tray in the injection data frame; In response to the triggering of the liquid preparation control, the host computer displays the actual liquid preparation volume and the set liquid preparation volume corresponding to the liquid injection mechanism in the liquid injection data frame; In response to the difference between the actual reserve liquid volume and the set reserve liquid volume being less than or equal to a preset deviation value, the host computer displays the injection data of the battery cell in the injection data frame.

18. The liquid injection system according to claim 17, wherein: In response to the battery cell being in a static position in the static mechanism, the host computer displays the static data of the battery cell in the injection data frame; The host computer displays process data in the injection data frame; The process data includes injection data of the battery cell and static data of the battery cell.

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