Battery electrolyte filling device and filling method thereof

Abstract

The invention discloses a battery electrolyte filling device which comprises a filling device body, and a filling mechanism is arranged on the filling device body; the filling mechanism comprises an electrolyte storage box, the electrolyte storage box is fixedly installed on the inner side wall of the filling device body, an electric hydraulic rod is fixedly installed on the outer surface of the electrolyte storage box, a connecting piece is fixedly installed at the output end of the electric hydraulic rod, and an electrolyte distributor is fixedly installed on the connecting piece; according to the invention, the servo motor drives the placement rack to rotate, automatic feeding and station switching of batteries can be realized, and meanwhile, the electric hydraulic rod accurately controls the position of the electrolyte distributor, so that the operation is simple and convenient, and the working efficiency is improved. The electrolyte can be uniformly and rapidly injected into the batteries, multiple batteries can be injected at a time, and compared with injection treatment of a diaphragm pump, the injection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of resource recovery, and particularly relates to a battery electrolyte filling device and a filling method thereof. Background Art

[0002] A battery electrolyte filling device is a device used to accurately add electrolyte to a battery. Through this device, the amount of electrolyte filling can be controlled to ensure that the amount of electrolyte in the battery meets the design requirements. If there is too much or too little electrolyte, it will affect the battery performance, and the electrolyte has certain corrosiveness, and there is a risk of injury in manual operation.

[0003] The existing battery electrolyte filling device is a device that uses a diaphragm pump for filling. When the device is started during filling, the diaphragm in the diaphragm pump makes a reciprocating motion driven by a motor. When the diaphragm expands outward, a negative pressure is formed in the pump chamber, and the electrolyte in the storage tank is sucked into the pump chamber through a pipeline; when the diaphragm compresses inward, the pressure in the pump chamber increases, and the electrolyte is transported to the battery filling port through the filling pipeline. During the filling process, a flow sensor monitors the electrolyte flow in real time and feeds it back to the control system to ensure the accuracy of the filling amount. However, the flow rate of the diaphragm pump is relatively small, and for large-scale and high-output battery production, it may not be able to meet the demand for rapid filling, resulting in low production efficiency, and it is impossible to accurately control the amount of electrolyte filling, thereby reducing the performance of the battery. Therefore, there is an urgent need for an efficient battery electrolyte filling device and a filling method. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery electrolyte filling device to solve the problems such as low production efficiency and reduced battery performance mentioned in the above background art.

[0005] In a first aspect, the present invention provides a battery electrolyte filling device, including:

[0006] A filling device body, on which a filling mechanism is provided;

[0007] The filling mechanism includes an electrolyte storage tank, which is fixedly installed on the inner side wall of the filling device body. An electric hydraulic rod is fixedly installed on the outer surface of the electrolyte storage tank. A connecting piece is fixedly installed at the output end of the electric hydraulic rod. The connecting piece fixedly installs an electrolyte distributor, and the electrolyte distributor is provided with a plurality of injection nozzles. A plurality of telescopic hoses are installed on the electrolyte storage tank, and the other ends of the telescopic hoses are connected to the electrolyte distributor.

[0008] In a possible implementation manner of the first aspect, the electrolyte storage tank is provided with a feed port, and the feed port penetrates through the filling device body.

[0009] In a possible implementation of the first aspect, an installation box is fixedly installed on the outer surface of the filling device body, and a servo motor is arranged inside the installation box.

[0010] In a possible implementation of the first aspect, a placement rack is rotatably arranged inside the filling device body, and a plurality of placement grooves are formed on the placement rack.

[0011] In a possible implementation of the first aspect, the output end of the servo motor rotatably penetrates through the filling device body, and the output end is fixedly connected to the bottom of the placement rack.

[0012] In a possible implementation of the first aspect, a support member is fixedly installed at the bottom of the filling device body.

[0013] Compared with the prior art, the present invention provides a battery electrolyte filling device, which has the following beneficial effects:

[0014] First, the present invention drives the placement rack to rotate through the servo motor, which can realize the automatic feeding and station switching of the battery. At the same time, the electric hydraulic rod accurately controls the position of the electrolyte distributor, so that the electrolyte can be evenly and quickly injected into the battery interior, and multiple battery filling processes can be carried out at one time. Compared with the filling process of the diaphragm pump, the filling efficiency is greatly improved.

[0015] Second, the multi-channel independent control flow path inside the electrolyte distributor is matched with the high-precision flowmeter and solenoid valve, which can accurately adjust the electrolyte flow rate according to the filling requirements of different specifications of batteries. The filling accuracy can reach ±1%, effectively avoiding the problem of unstable battery performance caused by inaccurate filling volume.

[0016] In the second aspect, the present invention provides a filling method for a battery electrolyte filling device, including:

[0017] Obtain the target battery to be filled, query the electrolyte formula and injection cavity parameters corresponding to the target battery, determine the electrolyte concentration of the target battery based on the electrolyte formula, and calculate the electrolyte filling volume of the target battery in combination with the battery parameters and the electrolyte concentration;

[0018] Collect the injection cavity image of the target battery, analyze the injection cavity characteristics of the target battery based on the injection cavity image, perform fluid dynamics simulation processing on the injection cavity characteristics to obtain flow simulation data, and collect the current ambient temperature corresponding to the filling device body. Determine the injection rate of the target battery with respect to the electrolyte based on the flow simulation data and the current ambient temperature;

[0019] Based on the electrolyte filling volume and the filling rate, formulate a filling plan for the target battery. Based on the filling plan, use the electrolyte distributor to control the injection nozzle to perform the filling process on the target battery to obtain a filling result.

[0020] In a possible implementation manner of the second aspect, calculating the electrolyte filling volume of the target battery by combining the battery parameters and the electrolyte concentration includes:

[0021] Analyze the chemical composition in the electrolyte formula, and evaluate the effective volume utilization rate of the filling chamber according to the filling chamber parameters;

[0022] Based on the chemical composition, analyze the performance indicators of the electrolyte at different concentrations;

[0023] Based on the effective volume utilization rate, analyze the restriction mode of the filling chamber on the electrolyte;

[0024] According to the performance indicators and the restriction mode, perform a partition evaluation on the filling chamber to obtain an evaluation partition;

[0025] Formulate a filling volume calculation algorithm corresponding to the evaluation partition, and combine the battery parameters and the electrolyte concentration, and use the filling volume calculation algorithm to calculate the electrolyte filling volume of the target battery.

[0026] In a possible implementation manner of the second aspect, analyzing the filling chamber characteristics of the target battery based on the filling chamber image includes:

[0027] Perform noise reduction processing on the filling chamber image to obtain a noise-reduced filling chamber image;

[0028] Perform segmentation processing on the noise-reduced filling chamber image to obtain a target filling chamber image;

[0029] Extract the cavity structure characteristics corresponding to the target filling chamber image;

[0030] Perform encoding processing on the cavity structure characteristics to obtain a feature encoding value, and based on the feature encoding value, calculate the feature encoding mean value of the cavity structure characteristics;

[0031] Based on the feature encoding value and the feature encoding mean value, calculate the feature contribution degree corresponding to the cavity structure characteristics through the following formula:

[0032]

[0033] Among them, A represents the feature contribution degree corresponding to the cavity structure characteristics, q represents the number corresponding to the feature encoding value, B a represents the a-th encoding value in the feature encoding value, D represents the feature encoding mean value, Ha It represents the feature weight of the a-th coding value in the feature coding value, where a represents the serial number of the feature coding value;

[0034] Based on the feature contribution degree, the cavity structure features are screened to obtain the injection cavity features of the target battery.

[0035] In a possible implementation manner of the second aspect, determining the injection rate of the target battery with respect to the electrolyte based on the flow simulation data and the current ambient temperature includes:

[0036] Extract the simulation label corresponding to the flow simulation data and identify the flow state label in the simulation label;

[0037] Based on the flow state label, the flow simulation data is screened to obtain flow feature data;

[0038] Based on the current ambient temperature, analyze the rheological characteristic parameters of the electrolyte in the target battery under the current environment;

[0039] Couple and analyze the flow feature data and the rheological characteristic parameters to obtain the flow mechanism of the electrolyte;

[0040] Based on the flow mechanism, determine the injection rate of the target battery with respect to the electrolyte.

[0041] It can be seen that the present invention calculates the electrolyte filling amount of the target battery by combining the battery parameters and the electrolyte concentration, which can provide a scientific quantitative basis for electrolyte filling, improve the filling accuracy and the performance stability of the battery. At the same time, it can avoid battery failures or performance degradation caused by improper filling amounts, reduce production costs and resource waste. The present invention analyzes the injection cavity features of the target battery based on the injection cavity image, and can understand the spatial structure, internal channel morphology and dimensional details of the injection cavity, providing an accurate data basis for subsequent fluid dynamics simulation. The present invention formulates the injection plan of the target battery by combining the electrolyte filling amount and the injection rate, which can accurately balance the injection efficiency and the injection quality, avoid the problem of electrolyte overflow caused by the mismatch between the filling amount and the rate, and ensure the stability and controllability of the injection process; based on the injection plan, the injection nozzle is controlled by the electrolyte distributor to perform the injection process on the target battery, which can realize automated and standardized injection operations, reduce the errors caused by human intervention, improve the consistency and the yield rate of battery production, and effectively reduce the production cost. Description of the Drawings

[0042] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0043] Figure 1 Schematic diagram of the three-dimensional structure of the battery electrolyte filling device proposed in an embodiment of the present invention;

[0044] Figure 2 Schematic cross-sectional view of the structure of the filling mechanism proposed in an embodiment of the present invention;

[0045] Figure 3 Schematic diagram of the structure of the placement rack proposed in an embodiment of the present invention;

[0046] Figure 4 Flowchart of the filling method of a battery electrolyte filling device proposed in an embodiment of the invention;

[0047] In the figure: 1. Filling device body; 11. Support member; 12. Installation box; 13. Servo motor; 14. Placement rack; 15. Placement groove; 2. Filling mechanism; 21. Electrolyte storage box; 22. Electric hydraulic rod; 23. Feed inlet; 24. Connecting member; 25. Electrolyte distributor; 26. Injection nozzle; 27. Telescopic hose. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] Please refer to Figure 1 , which is a schematic diagram of the three-dimensional structure of the battery electrolyte filling device proposed by the present invention, including a filling device body 1. A filling mechanism 2 is provided on the filling device body 1. A support member 11 is fixedly installed at the bottom of the filling device body 1, and an anti-slip rubber pad is provided at the bottom, which can not only effectively disperse the weight of the device, prevent shaking during the filling process, but also adapt to a variety of ground environments.

[0050] Please refer to Figure 2, which is a schematic cross-sectional view of the structure of a battery electrolyte filling device proposed in an embodiment of the present invention. The filling mechanism 2 includes an electrolyte storage tank 21, which is fixedly installed on the inner side wall of the filling device body 1. The electrolyte storage tank 21 is made of double-layer stainless steel, and the inner layer is treated with a special anti-corrosion coating, which can effectively prevent the corrosion of the electrolyte on the tank body and ensure the storage safety of the electrolyte. An electric hydraulic rod 22 is fixedly installed on the outer surface of the electrolyte storage tank 21. The electric hydraulic rod 22 is a high-precision servo hydraulic rod equipped with a closed-loop control system, which can achieve precise displacement control of ±0.1 mm, ensuring that the electrolyte dispenser 25 can accurately reach the predetermined position during the filling process. The output end of the electric hydraulic rod 22 is fixedly installed with a connector 24, and the connector 24 is fixedly installed with an electrolyte dispenser 25. The electrolyte dispenser 25 is provided with a plurality of injection nozzles 26. The electrolyte dispenser 25 is internally provided with multiple independently controlled flow channels, and each flow channel is equipped with a high-precision flow meter and a solenoid valve, which can achieve precise flow control of each injection nozzle 26 to meet the filling requirements of different specifications of batteries. A plurality of telescopic hoses 27 are installed on the electrolyte storage tank 21. The telescopic hoses 27 are made of acid and alkali resistant rubber, and are internally woven with a high-strength fiber reinforcing layer, having good flexibility and compressive performance, and can flexibly expand and contract during the movement of the electrolyte dispenser 25 to ensure the stable delivery of the electrolyte. The other end of the telescopic hose 27 is connected to the electrolyte dispenser 25. The electrolyte storage tank 21 is provided with a feed port 23, and the feed port 23 penetrates through the filling device body 1.

[0051] Please refer to Figure 3 , which is a schematic view of the structure of a placement rack proposed in an embodiment of the present invention. An installation box 12 is fixedly installed on the outer surface of the filling device body 1. A servo motor 13 is arranged inside the installation box 12. The servo motor 13 is a high-torque and low-noise motor equipped with a high-precision encoder, which can achieve an angular control accuracy of ±0.1°. A placement rack 14 is rotatably arranged inside the filling device body 1. The surface of the placement rack 14 is treated with anti-slip to prevent the battery from sliding during rotation. A plurality of placement slots 15 are opened on the placement rack 14. The output end of the servo motor 13 rotates through the filling device body 1, and the output end is fixedly connected to the bottom of the placement rack 14.

[0052] Working principle and usage process of a battery electrolyte filling device of the present invention: First, inject the electrolyte into the storage tank through the feed port 23 on the electrolyte storage tank 21, and sequentially place the batteries to be filled into the interior of the placement slots 15. Start the servo motor 13, and the output end of the servo motor 13 drives the placement rack 14 to rotate. As the placement rack 14 rotates, the batteries are sequentially transported to the filling station, that is, directly below the injection nozzle 26. The electric hydraulic rod 22 performs precise displacement control according to a preset program, pushing the electrolyte distributor 25 to a suitable position so that the multiple injection nozzles 26 are aligned with the filling ports of the batteries. The electrolyte is transported to the electrolyte distributor 25 through multiple telescopic hoses 27. The electrolyte distributor 25 is internally provided with flow channels independently controlled in multiple paths, and the high-precision flow meters and solenoid valves equipped in each flow channel start to function. According to different battery specifications and filling requirements, the system controls the solenoid valves of each flow channel to open, precisely adjusts the electrolyte flow rate, and uniformly injects the electrolyte into the battery through the injection nozzle 26. The servo motor 13 is started again to drive the placement rack 14 to rotate, removing the battery filled with electrolyte from the filling station, and at the same time transporting the next group of batteries to be filled to the station, repeating the above filling process to achieve continuous automatic filling.

[0053] Referring to Figure 4 as shown, a filling method of a battery electrolyte filling device proposed in an embodiment of the present invention includes:

[0054] S1. Obtain the target battery to be filled, query the electrolyte formula and liquid injection cavity parameters corresponding to the target battery, determine the electrolyte concentration of the target battery based on the electrolyte formula, and calculate the electrolyte filling amount of the target battery by combining the battery parameters and the electrolyte concentration.

[0055] By combining the battery parameters and the electrolyte concentration, the present invention calculates the electrolyte filling amount of the target battery, which can provide a scientific quantitative basis for electrolyte filling, improve the filling accuracy and the performance stability of the battery, and at the same time avoid battery failures or performance degradation caused by improper filling amounts, reducing production costs and resource waste.

[0056] Among them, the electrolyte formula refers to information on various chemical components and their proportions that make up the battery electrolyte; the liquid injection cavity parameters include data such as the volume, shape, internal structure of the liquid injection cavity, and the connection relationship with other battery components. The electrolyte filling amount is the specific quantity of electrolyte that the target battery needs to add to ensure that the battery performance reaches the best state or meets specific working requirements. Further, the electrolyte formula and liquid injection cavity parameters corresponding to the target battery can be queried through the battery management system database or production archives, and the electrolyte concentration of the target battery can be determined based on the electrolyte formula through chemical analysis calculations or a formula correspondence table.

[0057] As an embodiment of the present invention, calculating the electrolyte filling amount of the target battery by combining the battery parameters and the electrolyte concentration includes:

[0058] Analyze the chemical composition in the electrolyte formula, and evaluate the effective volume utilization rate of the liquid injection chamber according to the liquid injection chamber parameters;

[0059] Based on the chemical composition, analyze the performance indicators of the electrolyte at different concentrations;

[0060] Based on the effective volume utilization rate, analyze the restriction mode of the liquid injection chamber on the electrolyte;

[0061] According to the performance indicators and the restriction mode, conduct a partition evaluation on the liquid injection chamber to obtain an evaluation partition;

[0062] Formulate a filling amount calculation algorithm corresponding to the evaluation partition, combine the battery parameters and the electrolyte concentration, and use the filling amount calculation algorithm to calculate the electrolyte filling amount of the target battery.

[0063] Among them, the performance indicators refer to parameters such as conductivity, ion mobility, and stability of the electrolyte at different concentrations, which reflect its performance advantages and disadvantages; the effective volume utilization rate refers to the proportion of the actual volume available for accommodating the electrolyte in the total volume of the liquid injection chamber; the restriction mode refers to the restriction situations such as local restriction and space waste on the electrolyte accommodation capacity caused by factors such as the shape and internal structure of the liquid injection chamber; the evaluation partition is a division of the liquid injection chamber with performance and restriction feature identifiers according to the performance indicators and the restriction mode; the filling amount calculation algorithm is a method for calculating the electrolyte filling amount formulated for its performance and restriction features corresponding to the evaluation partition.

[0064] Optionally, the chemical components and their proportions in the electrolyte formulation can be analyzed by chemical analysis methods. For example, the structure of the liquid injection cavity can be accurately restored using 3D modeling software, and virtual electrolyte can be filled through fluid simulation algorithms to analyze the influence of structures such as internal partitions and protrusions in the liquid injection cavity on the electrolyte filling space, calculate the proportion of the actual available volume to the total volume, and thus obtain the effective volume utilization rate. Based on the chemical components and their proportions, the performance indicators of the electrolyte at different concentrations can be analyzed through experimental research and theoretical calculations. Based on the effective volume utilization rate, the limitation mode of the liquid injection cavity on the electrolyte accommodation capacity can be analyzed with the aid of the principles of fluid mechanics. According to the performance indicators and the limitation mode, the liquid injection cavity can be evaluated and partitioned according to the pre-set evaluation rules to obtain evaluation partitions. For example, according to the performance indicators such as electrolyte conductivity and stability and the limitation modes such as local narrowness and abnormal structures in the liquid injection cavity, the liquid injection cavity can be divided into evaluation partitions with different functional characteristics such as a high-activity adaptation area and a conventional filling area. The filling amount calculation algorithm corresponding to the evaluation partition is formulated based on the characteristics of the evaluation partition. Based on the filling amount calculation algorithm, the electrolyte filling amount of the target battery is calculated. For example, the total volume of the liquid injection cavity is multiplied by the effective volume utilization rate to obtain the effective volume, and then combined with the reference amount calculated according to the rated capacity of the battery and the electrolyte concentration, the sum of the two is multiplied by an empirical coefficient, and finally divided by the density of the electrolyte at this concentration, so as to calculate the electrolyte filling amount of the target battery. The formula can be expressed as: filling amount = (total volume of liquid injection cavity × effective volume utilization rate + rated capacity of battery ÷ electrolyte concentration × correlation coefficient) ÷ electrolyte density.

[0065] S2. Collect the image of the liquid injection cavity of the target battery. Based on the image of the liquid injection cavity, analyze the characteristics of the liquid injection cavity of the target battery, perform fluid dynamics simulation processing on the characteristics of the liquid injection cavity to obtain flow simulation data, and collect the current ambient temperature corresponding to the filling device body. Based on the flow simulation data and the current ambient temperature, determine the liquid injection rate of the target battery with respect to the electrolyte.

[0066] Based on the image of the liquid injection cavity, the present invention analyzes the characteristics of the liquid injection cavity of the target battery, and can understand the spatial structure, internal channel morphology and dimensional details of the liquid injection cavity, providing an accurate data basis for subsequent fluid dynamics simulation. Among them, the image of the liquid injection cavity is a visual representation of the appearance and internal structure of the liquid injection cavity of the target battery, the characteristics of the liquid injection cavity are structural characteristic parameters such as the shape complexity, channel size, and inner wall roughness of the liquid injection cavity of the target battery, and the flow simulation data is a set of quantitative data such as the velocity distribution, pressure change, and streamline trajectory of the electrolyte when flowing in the liquid injection cavity obtained after fluid dynamics simulation processing of the characteristics of the liquid injection cavity. Further, the image of the liquid injection cavity of the target battery can be collected by an industrial endoscope equipped with a high-definition camera and a ring-shaped supplementary light; the characteristics of the liquid injection cavity can be processed by fluid dynamics simulation by importing a three-dimensional model of the liquid injection cavity into professional CFD simulation software and setting the physical parameters and boundary conditions of the electrolyte to obtain flow simulation data.

[0067] As an embodiment of the present invention, the analysis of the characteristics of the liquid injection cavity of the target battery based on the image of the liquid injection cavity includes:

[0068] Perform noise reduction processing on the image of the liquid injection cavity to obtain a noise-reduced image of the liquid injection cavity;

[0069] Perform segmentation processing on the noise-reduced image of the liquid injection cavity to obtain a target image of the liquid injection cavity;

[0070] Extract the cavity structure characteristics corresponding to the target image of the liquid injection cavity;

[0071] Perform coding processing on the cavity structure characteristics to obtain a feature coding value, and based on the feature coding value, calculate the feature coding mean value of the cavity structure characteristics;

[0072] Based on the feature coding value and the feature coding mean value, calculate the feature contribution degree corresponding to the cavity structure characteristics through the following formula:

[0073]

[0074] Among them, A represents the feature contribution degree corresponding to the cavity structure characteristics, q represents the quantity corresponding to the feature coding value, B a represents the a-th coding value in the feature coding value, D represents the feature coding mean value, H a represents the feature weight value of the a-th coding value in the feature coding value, and a represents the serial number of the feature coding value;

[0075] Based on the feature contribution degree, perform screening processing on the cavity structure characteristics to obtain the characteristics of the liquid injection cavity of the target battery.

[0076] Among them, the denoised liquid injection cavity image is the image obtained after denoising the liquid injection cavity image, which removes the noise interference in the image and makes the image clearer; the target liquid injection cavity image is the image obtained after processing the denoised liquid injection cavity image, such as the image obtained after operations such as cropping and adjusting the contrast; the cavity structure feature is the feature information corresponding to the target liquid injection cavity image that can reflect aspects such as the shape, size, and internal structure of the liquid injection cavity, such as the size of the chamber, the width of the channel, the radian of the corner, etc.; the feature coding value is the numerical representation obtained by converting the cavity structure feature through a specific coding algorithm, quantifying the cavity structure feature in the form of digital codes; the feature coding mean is the average value of all feature coding values of the cavity structure feature, used to reflect an average quantization level of the cavity structure feature as a whole; the feature contribution degree represents the degree of influence or importance of the cavity structure feature corresponding to the result or other relevant factors in the entire liquid injection cavity system or related analysis, and the feature weight represents the proportion of the feature coding value in the coding value, which can be obtained by calculating the ratio of the feature weight to the total feature coding value.

[0077] Furthermore, the Gaussian noise in the image can be removed by the Gaussian filtering algorithm, and at the same time, the median filtering is combined to reduce the salt-and-pepper noise to perform denoising processing on the liquid injection cavity image to obtain the denoised liquid injection cavity image; the denoised liquid injection cavity image can be segmented by a method combining threshold segmentation and edge detection based on the image gray value and boundary information to obtain the target liquid injection cavity image; the cavity structure feature corresponding to the target liquid injection cavity image can be extracted by using the powerful feature extraction ability of the convolutional neural network model in deep learning; the cavity structure feature can be encoded by mapping it to a specific coding space and using one-hot coding or hash coding, etc. to obtain the feature coding value. Based on the feature coding value, the feature coding mean of the cavity structure feature can be calculated by calculating the sum of all feature coding values and dividing by the number of features; based on the feature contribution degree, according to the preset contribution degree threshold, the features with a contribution degree greater than the threshold are screened to perform screening processing on the cavity structure feature to obtain the liquid injection cavity feature of the target battery.

[0078] The present invention determines the filling rate of the target battery with respect to the electrolyte based on the flow simulation data and the current ambient temperature, avoiding problems such as uneven filling and bubble residue during subsequent electrolyte filling, laying a foundation for improving the filling efficiency of the battery. Herein, the current ambient temperature is the real-time temperature value of the environment where the filling device is located at the moment of filling operation corresponding to the filling device body, and this temperature will affect the physical properties of the electrolyte; the filling rate is the unit time flow rate when injecting the electrolyte into the target battery, which is comprehensively considered in terms of the filling chamber structure, electrolyte characteristics and environmental factors to ensure uniform and efficient filling of the electrolyte without causing abnormal problems. Further, the current ambient temperature corresponding to the filling device body can be collected by a temperature sensor.

[0079] As an embodiment of the present invention, the determining the filling rate of the target battery with respect to the electrolyte based on the flow simulation data and the current ambient temperature includes:

[0080] Extract the simulation tags corresponding to the flow simulation data and identify the flow state tags in the simulation tags;

[0081] Based on the flow state tags, perform data screening processing on the flow simulation data to obtain flow characteristic data;

[0082] Based on the current ambient temperature, analyze the rheological characteristic parameters of the electrolyte in the target battery under the current environment;

[0083] Perform coupled analysis on the flow characteristic data and the rheological characteristic parameters to obtain the flow mechanism of the electrolyte;

[0084] Based on the flow mechanism, determine the filling rate of the target battery with respect to the electrolyte.

[0085] Herein, the simulation tags are a set of tags corresponding to the flow simulation data for identifying and explaining relevant information such as the attributes, characteristics, and sources of the flow simulation data; the flow state tags are part of the tag content in the simulation tags that are specifically used to describe and characterize the relevant information of the electrolyte flow state in the filling chamber; the flow characteristic data are the data corresponding to the flow state tags in the flow simulation data, that is, the representative and key data related to the specific flow state of the electrolyte selected from the flow simulation data; the rheological characteristic parameters are the parameters that reflect the physical properties related to the flow and deformation of the electrolyte in the target battery under the current environment, such as viscosity, surface tension, etc.; the electrolyte flow mechanism is the internal reason and mechanism explanation for why the electrolyte shows specific flow behaviors and laws during the filling process obtained by performing coupled analysis on the flow characteristic data and the rheological characteristic parameters.

[0086] Furthermore, the simulation label corresponding to the flow simulation data can be extracted by reading the metadata information of the flow simulation data through a data annotation parsing program; the flow state label in the simulation label can be identified by using a natural language processing algorithm to recognize the keywords related to the flow state in the label text; based on the flow state label, the flow simulation data can be screened by writing a data screening script to screen the corresponding data according to the label category, and the flow characteristic data can be obtained; based on the current ambient temperature, parameters such as viscosity and surface tension corresponding to this temperature can be obtained by querying the electrolyte physical property database, and then the rheological characteristic parameters of the electrolyte of the target battery in the current environment can be obtained; the flow characteristic data and the rheological characteristic parameters can be coupled and analyzed by substituting the flow characteristic data into the hydrodynamic equation and performing numerical calculations in combination with the rheological parameters to obtain the flow mechanism of the electrolyte. For example, the flow velocity distribution and pressure gradient in the flow characteristic data are substituted into the Navier-Stokes equation, and combined with the viscosity parameter of the electrolyte at the current temperature, the fluid force conditions at different positions are calculated; then, based on the surface tension parameter, the morphological changes of the gas-liquid interface are analyzed through the Young-Laplace equation, so as to reveal the flow path, diffusion law and interface behavior of the electrolyte in the filling cavity, etc. flow mechanism; based on the flow mechanism, the steps to determine the filling rate of the electrolyte for the target battery are as follows: First, analyze the minimum pressure and flow velocity conditions required for the uniform filling of the electrolyte in the filling cavity according to the flow mechanism; Second, combine the maximum pressure and flow rate limitations of the filling equipment to initially delimit the filling rate range; Finally, through multiple groups of simulated filling experiments, with the uniform filling degree of the electrolyte and the residual amount of bubbles as the core evaluation indicators, the optimal filling rate that meets the process requirements is screened out within the above rate range.

[0087] S3. Combine the electrolyte filling volume and the filling rate to formulate a filling plan for the target battery. Based on the filling plan, use the electrolyte distributor to control the injection nozzle to perform the filling process on the target battery to obtain a filling result.

[0088] By combining the electrolyte filling volume and the filling rate, the present invention formulates a filling plan for the target battery, which can accurately balance the filling efficiency and filling quality, avoid the problem of electrolyte overflow caused by the mismatch between the filling volume and the rate, and ensure the stability and controllability of the filling process; based on the filling plan, the electrolyte distributor is used to control the injection nozzle to perform the filling process on the target battery, which can realize automatic and standardized filling operations, reduce the errors caused by human intervention, improve the consistency and yield of battery production, and effectively reduce the production cost. Among them, the filling plan is a comprehensive operation guidance document formulated by the target battery in combination with the electrolyte filling volume and the filling rate, including the total amount of electrolyte injection, the filling speed control strategy, the filling process and the setting of relevant process parameters. Further, by combining the electrolyte filling volume and the filling rate, the filling plan for the target battery is formulated, and the formulation steps are as follows: First, according to the electrolyte filling volume and the filling rate, calculate the theoretical filling time, and plan the filling path in combination with the battery structure; Secondly, divide the filling process into stages such as pre-filling, uniform filling, and supplementary filling, and set the filling rate and time allocation for each stage respectively; Finally, clarify the key parameters such as pressure control and flow monitoring during the filling process to form a complete filling plan; construct a control program corresponding to the filling plan, and input the control program into the electric hydraulic rod, electrolyte distributor and servo motor to control the injection nozzle to perform the filling process on the target battery and obtain the filling result.

[0089] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery electrolyte filling device, comprising a filling device body (1), characterized in that: The filling device body (1) is provided with a filling mechanism (2); The filling mechanism (2) includes an electrolyte storage tank (21), the electrolyte storage tank (21) is fixedly installed on the inner side wall of the filling device body (1), an electric hydraulic rod (22) is fixedly installed on the outer surface of the electrolyte storage tank (21), a connecting piece (24) is fixedly installed at the output end of the electric hydraulic rod (22), an electrolyte distributor (25) is fixedly installed on the connecting piece (24), a plurality of injection nozzles (26) are arranged on the electrolyte distributor (25), a plurality of telescopic hoses (27) are installed on the electrolyte storage tank (21), and the other end of the telescopic hose (27) is connected to the electrolyte distributor (25).

2. The battery electrolyte filling device according to claim 1, characterized in that, The electrolyte storage tank (21) is provided with a feed port (23), and the feed port (23) penetrates through the filling device body (1).

3. A battery electrolyte filling device according to claim 1, characterized in that, An installation box (12) is fixedly installed on the outer surface of the filling device body (1), and a servo motor (13) is arranged inside the installation box (12).

4. The battery electrolyte filling device according to claim 3, characterized in that, A placement rack (14) is rotatably arranged inside the filling device body (1), and a plurality of placement grooves (15) are formed on the placement rack (14).

5. The battery electrolyte filling device according to claim 4, wherein, The output end of the servo motor (13) rotatably penetrates through the filling device body (1), and the output end is fixedly connected to the bottom of the placement rack (14).

6. A battery electrolyte filling device according to claim 1, characterized in that, A support member (11) is fixedly installed at the bottom of the filling device body (1).

7. A filling method for a battery electrolyte filling device, which executes its filling method according to the battery electrolyte filling device described in any one of claims 1 to 6, characterized in that, The method includes: Obtaining a target battery to be filled, querying the electrolyte formula and the liquid injection cavity parameters corresponding to the target battery, determining the electrolyte concentration of the target battery based on the electrolyte formula, and calculating the electrolyte filling amount of the target battery by combining the battery parameters and the electrolyte concentration; Collecting an image of the liquid injection cavity of the target battery, analyzing the characteristics of the liquid injection cavity of the target battery based on the image of the liquid injection cavity, performing a computational fluid dynamics simulation on the characteristics of the liquid injection cavity to obtain flow simulation data, and collecting the current ambient temperature corresponding to the filling device body, and determining the liquid injection rate of the target battery with respect to the electrolyte based on the flow simulation data and the current ambient temperature; Combining the electrolyte filling amount and the liquid injection rate, formulating a liquid injection plan for the target battery, and based on the liquid injection plan, using the electrolyte distributor to control the injection nozzles to perform the liquid injection process on the target battery to obtain a liquid injection result.

8. The method according to claim 7, wherein The calculating the electrolyte filling amount of the target battery by combining the battery parameters and the electrolyte concentration includes: Analyzing the chemical composition in the electrolyte formula, and evaluating the effective volume utilization rate of the liquid injection cavity according to the liquid injection cavity parameters; Analyzing the performance indexes of the electrolyte at different concentrations based on the chemical composition; Analyzing the restriction mode of the liquid injection cavity on the electrolyte based on the effective volume utilization rate; Performing a partition evaluation on the liquid injection cavity according to the performance indexes and the restriction mode to obtain an evaluation partition; Formulate the filling volume calculation algorithm corresponding to the evaluation partition, and combine the battery parameters and the electrolyte concentration to calculate the electrolyte filling volume of the target battery using the filling volume calculation algorithm.

9. The method according to claim 7, characterized in that, Based on the liquid injection chamber image, analyze the characteristics of the liquid injection chamber of the target battery, including: Perform noise reduction processing on the liquid injection chamber image to obtain a noise-reduced liquid injection chamber image; Perform segmentation processing on the noise-reduced liquid injection chamber image to obtain a target liquid injection chamber image; Extract the cavity structure characteristics corresponding to the target liquid injection chamber image; Perform coding processing on the cavity structure characteristics to obtain a feature coding value, and based on the feature coding value, calculate the feature coding mean value of the cavity structure characteristics; Based on the feature coding value and the feature coding mean value, calculate the feature contribution degree corresponding to the cavity structure characteristics through the following formula: Among them, A represents the feature contribution degree corresponding to the cavity structure feature, q represents the quantity corresponding to the feature coding value, and B a represents the a-th coding value in the feature coding value, D represents the feature coding mean value, and H a represents the feature weight of the a-th coding value in the feature coding value, and a represents the serial number of the feature coding value; Based on the feature contribution degree, perform screening processing on the cavity structure characteristics to obtain the characteristics of the liquid injection chamber of the target battery.

10. The method according to claim 7, wherein Based on the flow simulation data and the current ambient temperature, determine the liquid injection rate of the target battery with respect to the electrolyte, including: Extract the simulation label corresponding to the flow simulation data and identify the flow state label in the simulation label; Based on the flow state label, perform data screening processing on the flow simulation data to obtain flow characteristic data; Based on the current ambient temperature, analyze the rheological characteristic parameters of the electrolyte in the target battery under the current environment; Perform coupled analysis on the flow characteristic data and the rheological characteristic parameters to obtain the flow mechanism of the electrolyte; Based on the flow mechanism, determine the liquid injection rate of the target battery with respect to the electrolyte.

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