A smart liquid injection system for soft-pack lithium batteries

Abstract

This invention relates to the field of pouch lithium battery technology, and in particular to an intelligent liquid injection system for pouch lithium batteries. The system includes a main control module, a transfer module, a liquid replenishment module, a liquid injection and weighing module, and a sorting module, all signal-connected to the main control module. The liquid injection and weighing module is used to inject liquid into the pouch lithium batteries and weigh them after injection. The transfer module includes a transmission rail and mobile trolleys movably mounted on the transmission rail, each trolley equipped with a positioning module. The sorting module is used to sort the pouch lithium batteries according to their weight and place them into the mobile trolleys. The liquid replenishment module is used to replenish liquid into pouch lithium batteries that do not meet the weight requirements. This invention realizes the liquid injection and weighing of pouch lithium batteries through the liquid injection and weighing module, followed by sorting. Qualified pouch lithium batteries are transferred to the next workstation, while unqualified batteries are replenished and then transferred to the next workstation, resulting in a flexible and efficient working method.

Description

Technical Field

[0001] This invention relates to the field of soft-pack lithium battery technology, and in particular to an intelligent liquid injection system for soft-pack lithium batteries. Background Technology

[0002] One of the core processes of pouch lithium batteries is electrolyte injection, which involves injecting electrolyte into the pouch lithium battery to serve as the medium for energy storage and release. However, most existing pouch lithium battery electrolyte injection methods are assembly line-style, meaning the injection system can only inject the same amount of electrolyte into one type of pouch lithium battery at a time. If the electrolyte volume of a particular pouch lithium battery is insufficient, it needs to be replenished. In this case, typically the entire batch is transferred to the replenishment equipment, or the pouch lithium battery is transferred separately to the replenishment equipment.

[0003] Neither method is particularly efficient. Summary of the Invention

[0004] This invention addresses the problems of existing technologies by providing an intelligent liquid injection system for pouch lithium batteries. Through system coordination, it achieves the sorting effect of pouch lithium batteries and only transfers the pouch lithium batteries that need liquid injection to the system for injection, thereby improving flexibility and efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention provides an intelligent liquid injection system for soft-pack lithium batteries, comprising a main control module, a transfer module, a liquid replenishment module, a liquid injection weighing module, and a sorting module, all of which are signal-connected to the main control module.

[0007] The liquid injection and weighing module is used to inject liquid into the soft-pack lithium battery and weigh the soft-pack lithium battery after liquid injection to obtain the weight of each soft-pack lithium battery.

[0008] The transfer module includes a transmission rail and several mobile trolleys movably mounted on the transmission rail. Each mobile trolley is equipped with at least one positioning module for accommodating soft-pack lithium batteries.

[0009] The sorting module is used to sort the soft-pack lithium batteries according to their weight, and to put the sorted soft-pack lithium batteries into a mobile cart.

[0010] The liquid replenishment module is used to replenish liquid for soft-pack lithium batteries that do not meet the weight requirements.

[0011] Furthermore, the liquid injection and weighing module includes several liquid injection devices, each including a transmission mechanism, a barcode scanning mechanism, a liquid injection mechanism, and a weighing mechanism. The transmission mechanism is used to transmit the carrier containing the soft-pack lithium battery, the barcode scanning mechanism is used to scan the carrier to obtain information about the soft-pack lithium battery on the carrier, the liquid injection mechanism uses the information obtained by the barcode scanning mechanism to inject a preset amount of electrolyte into the soft-pack lithium battery, and the weighing mechanism is used to weigh the soft-pack lithium battery after liquid injection.

[0012] Furthermore, the carrier is equipped with multiple compartments for accommodating pouch lithium batteries, and each compartment has a weight sensor installed on its inner bottom wall; a conductive element is provided on one side of the carrier, and the liquid injection weighing module operates as follows:

[0013] Obtain the vehicle's location information;

[0014] Connect the conductive parts of the positioned vehicle to power the weight sensor through the conductive parts;

[0015] Obtain weight information from each weight sensor;

[0016] Bind weight information to vehicle information;

[0017] The soft-pack lithium batteries are separated from the conductive components and then sorted by the sorting module.

[0018] Furthermore, the operation of the injection device includes:

[0019] The vehicle's identity information is obtained through a scanning mechanism, and the initial weight and expected liquid injection volume of each soft-pack lithium battery are obtained from the vehicle's identity information.

[0020] The liquid injection mechanism performs liquid injection on the soft-pack lithium battery according to its specifications and the desired liquid injection volume; where the actual liquid injection volume = k * desired liquid injection volume, k is a constant and 1≤k≤1.1;

[0021] The actual weight of each soft-pack lithium battery inside the vehicle is obtained by weighing mechanism, and the weight change of each soft-pack lithium battery is calculated.

[0022] Convert the weight change value into the amount of electrolyte in the pouch lithium battery;

[0023] The electrolyte volume is compared with a preset value, and the lithium batteries are classified according to the comparison results.

[0024] Furthermore, the sorting module includes multiple sorting robots, with at least one sorting robot corresponding to each injection device. The actions of the sorting robots include:

[0025] Obtain the weight of each pouch lithium battery inside the vehicle;

[0026] Based on the weight information, put the qualified soft-pack lithium batteries into the first container and put the unqualified soft-pack lithium batteries into the second container.

[0027] Remove the vacant vehicle from the transmission mechanism and use it as a backup first / second container.

[0028] Furthermore, the sorting module also includes a transfer mechanism, which comprises a weighing platform, a transfer module, and two lifting modules.

[0029] The weighing platform is used to support the vehicle, and the liquid injection weighing module is installed on the weighing platform;

[0030] The lifting module includes a lifting base, a lifting drive component, and a lifting frame. The lifting frame is movably mounted on the lifting base. The lifting drive component is used to drive the lifting frame to move up and down relative to the lifting base. The lifting frame has multiple accommodating slots arranged in parallel. The accommodating slots are used to accommodate empty vehicles.

[0031] The transfer module is used to move empty vehicles into one of the lifting modules for storage.

[0032] Furthermore, the receiving slot is equipped with a first transmission module and a second transmission module; the sorting module operates in the following ways:

[0033] Weigh each soft-pack lithium battery inside the vehicle on a weighing platform;

[0034] After the soft-pack lithium batteries are weighed, the carrier is transferred to the transfer module, where the sorting robot sorts the soft-pack lithium batteries according to the weighing results.

[0035] The number of vehicles in each lifting module is counted, and the lifting module with the fewest vehicles is selected.

[0036] The lifting seat is raised and lowered by the lifting drive component so that the empty receiving slot is directly opposite the transfer module;

[0037] The first transmission module, in conjunction with the transfer module, drives the carrier to move from the weighing platform into the empty receiving slot;

[0038] When the first container / second container is full, the full first container / second container is transferred to the mobile trolley, and then the empty vehicle is moved out by the second transfer module for use as the first container / second container.

[0039] Furthermore, the transfer module includes a first transmission mechanism, a reversing platform, a second transmission mechanism, and a vision device. The first transmission mechanism is used to transfer the vehicle from the weighing platform to the reversing platform. The second transmission mechanism is disposed on the reversing platform, which has a lifting mechanism for driving the second transmission mechanism to move up and down. The second transmission mechanism is used to transfer the vehicle from the reversing platform to the lifting module.

[0040] Furthermore, the fluid replenishment module includes functions for performing the following steps:

[0041] Scan the identification code on the mobile vehicle to obtain the required weight of each soft-pack lithium battery on the vehicle;

[0042] Weigh each pouch lithium battery inside the vehicle to obtain the actual weight of the pouch lithium battery.

[0043] Add electrolyte to the pouch lithium batteries until each pouch lithium battery reaches the required weight.

[0044] If the actual weight of the pouch lithium battery remains at the required level after a preset time for static operation, liquid replenishment will cease; otherwise, liquid replenishment will continue.

[0045] Furthermore, the mobile vehicle is an AGV (Automated Guided Vehicle).

[0046] The beneficial effects of this invention are as follows: This invention uses a main control module for overall planning and a liquid injection and weighing module to realize the liquid injection and weighing of soft-pack lithium batteries. Then, the soft-pack lithium batteries are sorted, and qualified soft-pack lithium batteries are transferred to the next work station, while unqualified ones are replenished with liquid and then transferred to the next work station. The working method is flexible and efficient. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the principle of the present invention.

[0048] Figure 2 This is a layout diagram of the present invention.

[0049] Figure 3 This is a schematic diagram of the liquid injection weighing module and the sorting module of the present invention.

[0050] Figure 4 This is a schematic diagram of the lifting module of the present invention.

[0051] Figure 5 This is a schematic diagram of the vehicle of the present invention.

[0052] Reference numerals: 1—Main control module, 2—Transfer module, 3—Replenishment module, 4—Injection and weighing module, 5—Sorting module, 6—Carrier, 21—Transfer guide rail, 22—Mobile trolley, 23—Positioning module, 40—Injection equipment, 41—Transfer mechanism, 42—Scanning mechanism, 43—Injection mechanism, 44—Weighing mechanism, 51—Sorting robot, 52—Weighing platform, 53—Transfer module, 54—Lifting module, 61—Container, 62—Weight sensor, 63—Conductive component, 531—First transmission mechanism, 532—Reversing platform, 533—Second transmission mechanism, 534—Vision device, 541—Lifting seat, 542—Lifting drive component, 543—Lifting frame, 544—Container slot, 545—First transmission module, 546—Second transmission module. Detailed Implementation

[0053] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0054] like Figures 1 to 5 As shown, the present invention provides an intelligent liquid injection system for soft-pack lithium batteries, including a main control module 1, a transfer module 2, a liquid replenishment module 3, a liquid injection weighing module 4, and a sorting module 5, all of which are signal-connected to the main control module 1.

[0055] The liquid injection and weighing module 4 is used to inject liquid into the soft-pack lithium battery and weigh the soft-pack lithium battery after liquid injection to obtain the weight of each soft-pack lithium battery.

[0056] The transfer module 2 includes a transmission rail 21 and several mobile trolleys 22 movably mounted on the transmission rail 21. Each mobile trolley 22 is equipped with at least one positioning module 23 for accommodating soft-pack lithium batteries.

[0057] The sorting module 5 is used to sort the soft-pack lithium batteries according to their weight, and to put the sorted soft-pack lithium batteries into the mobile cart 22.

[0058] The liquid replenishment module 3 is used to replenish liquid for soft-pack lithium batteries that do not meet the weight requirements.

[0059] In other words, this invention adopts a "chain-type combined with island-type" approach. The soft-pack lithium batteries are preferably transported to the liquid injection and weighing module 4 through a conventional transmission module. After the liquid injection and weighing module 4 injects liquid into and weighs the soft-pack lithium batteries, the sorting module 5 sorts the soft-pack lithium batteries according to the weighing results, thereby separating the soft-pack lithium batteries that meet the weight requirements from those that do not meet the weight requirements (are not heavy enough). Subsequently, some of the mobile carts 22 move the soft-pack lithium batteries that meet the weight requirements to the next workstation, while other mobile carts 22 move the soft-pack lithium batteries that do not meet the weight requirements to the liquid replenishment module 3 for liquid replenishment, and then transport them to the next workstation.

[0060] This invention improves flexibility and intelligently sorts soft-pack lithium batteries, replenishing those that need liquid and directly transferring those that do not need liquid to the next station. Since the number of soft-pack lithium batteries that usually need liquid replenishment is small, it can achieve the effect of multiple liquid filling devices 40 paired with one liquid replenishment module 3, effectively optimizing the components, saving space and improving operational efficiency.

[0061] In this embodiment, the electrolyte filling and weighing module 4 includes several electrolyte filling devices 40. Each electrolyte filling device 40 includes a transmission mechanism 41, a barcode scanning mechanism 42, an electrolyte filling mechanism 43, and a weighing mechanism 44. The transmission mechanism 41 is used to transmit the carrier 6 containing the soft-pack lithium battery. The barcode scanning mechanism 42 is used to scan the carrier 6 to obtain information about the soft-pack lithium battery on the carrier 6. The electrolyte filling mechanism 43 uses the information obtained by the barcode scanning mechanism 42 to inject a preset amount of electrolyte into the soft-pack lithium battery. The weighing mechanism 44 is used to weigh the soft-pack lithium battery after electrolyte filling. Specifically, the transmission mechanism 41 can be a conventional conveyor belt or a conveyor belt with a station for accommodating the carrier 6, which will not be described further here.

[0062] Each carrier 6 has an identification code, preferably a QR code or barcode. This identification code is linked to the information of the corresponding pouch lithium battery when it is placed into the carrier 6. For example, if the carrier 6 has 6*6 compartments 61, the coordinates of each compartment 61 are linked to the information of the pouch lithium battery after it is placed in, facilitating traceability and smooth subsequent processes. After scanning, the electrolyte injection mechanism 43 injects the corresponding amount of electrolyte into each compartment 61 based on the information of the pouch lithium battery. The specifications and required electrolyte amount of each pouch lithium battery in each compartment 61 may differ; therefore, the identification code information is crucial for accurate and smooth electrolyte injection. After injection, the carrier 6 is moved to the weighing mechanism 44 for weighing. Specifically, the pouch lithium batteries in each compartment 61 are weighed to determine the quantity and location coordinates of qualified and unqualified pouch lithium batteries. After weighing, the sorting module 5 sorts the pouch lithium batteries.

[0063] It is important to note that during weighing, substandard pouch lithium batteries are placed in the same container (hereinafter referred to as the second container), while qualified pouch lithium batteries are placed in different containers (hereinafter referred to as the first container) according to their specifications. After the pouch lithium batteries in the second container are replenished with electrolyte, they will be sorted again when transferred to the next workstation. This sorting is an action of the next workstation and will not be described in detail here.

[0064] Specifically, the carrier 6 is equipped with multiple mobile carts 22 for accommodating soft-pack lithium batteries, and each mobile cart 22 has a weight sensor 62 installed on its inner bottom wall; a conductive component 63 is installed on one side of the carrier 6, and the liquid injection weighing module 4 operates as follows:

[0065] Obtain the arrival information of vehicle 6;

[0066] Connect the conductive component 63 of the positioned vehicle 6 to power the weight sensor 62 through the conductive component 63;

[0067] Obtain weight information fed back by each weight sensor 62;

[0068] Bind the weight information to the information of vehicle 6;

[0069] The soft-pack lithium batteries are separated from the conductive component 63 and then sorted by the sorting module 5.

[0070] Furthermore, the operation of the injection device 40 includes:

[0071] The identification information of the vehicle 6 is obtained through the scanning mechanism 42, and the initial weight and expected liquid injection volume of each soft-pack lithium battery are obtained from the identification information of the vehicle 6.

[0072] The liquid injection mechanism 43 performs liquid injection on the soft-pack lithium battery according to the specifications of the soft-pack lithium battery and the expected liquid injection amount; wherein, the actual liquid injection amount = k * expected liquid injection amount, k is a constant and 1≤k≤1.1;

[0073] The actual weight of each soft-pack lithium battery in the carrier 6 is obtained by weighing mechanism 44, and the weight change of each soft-pack lithium battery is calculated.

[0074] Convert the weight change value into the amount of electrolyte in the pouch lithium battery;

[0075] The electrolyte volume is compared with a preset value, and the lithium batteries are classified according to the comparison results.

[0076] Each carrier 6 has a built-in weight sensor 62, which is not powered and not in operation under normal conditions. After the liquid filling is completed, the weighing mechanism 44 contacts the conductive element 63 and supplies power to the conductive element 63, so that each weight sensor 62 is powered and works to weigh the soft-pack lithium battery in the corresponding container 61, thereby quickly obtaining the actual weight of each soft-pack lithium battery. After obtaining a stable and accurate weight value and recording it, the weighing mechanism 44 cuts off the power to the conductive element 63, and the soft-pack lithium battery can be handed over to the subsequent sorting module 5 for sorting.

[0077] The electrolyte injection volume of this invention is higher than expected. This expected injection volume is typically the minimum or middle value of the acceptable injection range. The constant k is set as a coefficient primarily because electrolyte loss can occur during the injection process due to various reasons. The role of k is to further reduce the number of substandard weight pouch lithium batteries, thereby reducing the need for electrolyte replenishment. The weight defect rate of pouch lithium batteries injected using this invention is controlled to within 5%.

[0078] It should be noted that the weight sensors 62 inside the vehicle 6 are arranged in parallel. When one weight sensor 62 is damaged, it will be unable to send a signal. At this time, the present invention will record the problem, and when the vehicle 6 is used again, the damaged weight sensor 62 will not be placed in the slot 61. When the number of damaged weight sensors 62 exceeds a certain number (for example, 3 weight sensors 62 are damaged in a 6*6 specification vehicle 6), the vehicle 6 will be sent away from the present invention in the next cycle for repair or disposal by the staff.

[0079] In this embodiment, the sorting module 5 includes multiple sorting robots 51, and at least one sorting robot 51 is configured corresponding to one liquid injection device 40. The actions of the sorting robot 51 include:

[0080] Obtain the weight of each pouch lithium battery inside vehicle 6;

[0081] Based on the weight information, put the qualified soft-pack lithium batteries into the first container and put the unqualified soft-pack lithium batteries into the second container.

[0082] Remove the empty vehicle 6 from the transmission mechanism 41 and use it as a spare first / second container.

[0083] The sorting robot 51 has a conventional structure and will not be described in detail here. The aforementioned first container can be set according to the specifications and quantity of the soft-pack lithium batteries injected according to the present invention, such as three first containers and one second container in this embodiment. The sorting robot 51 has a corresponding vision module that can identify the coordinates of the soft-pack lithium batteries, thereby accurately picking up the soft-pack lithium batteries and placing them into the appropriate first container, achieving a fast and intelligent sorting effect.

[0084] Specifically, the sorting module 5 further includes a transfer mechanism, which comprises a weighing platform 52, a transfer module 53, and two lifting modules 54.

[0085] Weighing platform 52 is used to support carrier 6, and liquid injection weighing module 4 is installed on weighing platform 52;

[0086] The lifting module 54 includes a lifting base 541, a lifting drive 542, and a lifting frame 543. The lifting frame 543 is movably disposed on the lifting base 541. The lifting drive 542 is used to drive the lifting frame 543 to lift relative to the lifting base 541. The lifting frame 543 has multiple receiving slots 544 arranged in parallel. The receiving slots 544 are used to receive empty vehicles 6.

[0087] The transfer module 53 is used to move an empty vehicle 6 into one of the lifting modules 54 for storage.

[0088] In actual use, the receiving slot 544 is equipped with a first transmission module 545 and a second transmission module 546; the operation mode of the sorting module 5 includes:

[0089] Weigh each soft-pack lithium battery in the vehicle 6 on the weighing platform 52;

[0090] After weighing the soft-pack lithium batteries, the carrier 6 is transferred to the transfer module 53, where the sorting robot 51 sorts the soft-pack lithium batteries according to the weighing results.

[0091] The number of vehicles 6 in each lifting module 54 is obtained and counted, and the lifting module 54 with fewer vehicles 6 is selected.

[0092] The lifting seat 541 is raised and lowered by the lifting drive 542 so that the empty receiving slot 544 is directly opposite the transfer module 53.

[0093] The first transmission module 545, in conjunction with the transfer module 53, drives the carrier 6 to move from the weighing platform 52 into the empty receiving slot 544;

[0094] When the first container / second container is full, the full first container / second container is transferred to the mobile trolley 22, and then the empty carrier 6 is moved out by the second transfer module 546 to be used as the first container / second container.

[0095] Multiple first containers can be configured in different locations as needed, while only one second container is required. The ratio of the number of first containers to the number of second containers is set according to the proportion of unqualified soft-pack lithium batteries in actual production.

[0096] That is, the carrier 6 can be used as a tool for accommodating soft-pack lithium batteries at different stages. The unloaded carrier 6 will be placed in the accommodating tank 544 as the first container / second container; and the carrier 6 that is transferred to the next station will also be transferred and used as a carrier 6 for accommodating unfilled batteries, so as to further improve the utilization rate of the carrier 6.

[0097] Specifically, the transfer module 53 includes a first transmission mechanism 531, a reversing platform 532, a second transmission mechanism 533, and a vision device 534. The first transmission mechanism 531 is used to transfer the vehicle 6 from the weighing platform 52 to the reversing platform 532. The second transmission mechanism 533 is disposed on the reversing platform 532. The reversing platform 532 has a lifting mechanism for driving the second transmission mechanism 533 to rise and fall. The second transmission mechanism 533 is used to transfer the vehicle 6 from the reversing platform 532 to the lifting module 54.

[0098] In this embodiment, the first transmission mechanism 531 and the second transmission mechanism 533 are both conventional linear transmission modules, and the structure of the reversing stage 532 is a conventional transmission module; while the vision device 534 is an industrial camera, specifically used to identify whether the receiving slot 544 facing the reversing stage 532 is empty, thereby ensuring that the carrier 6 safely enters the receiving slot 544.

[0099] In this embodiment, the fluid replenishment module 3 includes functions for performing the following steps:

[0100] Scan the identification code of vehicle 6 on mobile cart 22 to obtain the required weight of each soft-pack lithium battery on vehicle 6;

[0101] Weigh each soft-pack lithium battery inside vehicle 6 to obtain the actual weight of the soft-pack lithium battery.

[0102] Add electrolyte to the pouch lithium batteries until each pouch lithium battery reaches the required weight.

[0103] If the actual weight of the pouch lithium battery remains at the required level after a preset time for static operation, liquid replenishment will cease; otherwise, liquid replenishment will continue.

[0104] Before adding electrolyte, each pouch lithium battery still needs to be weighed to determine its actual weight. Subsequent electrolyte additions can then be made according to the specific weight loss of each pouch lithium battery. In other words, each electrolyte replenishment station within the replenishment module 3 operates independently and does not interfere with the others.

[0105] Furthermore, the mobile vehicle 22 is an AGV (Automated Guided Vehicle) with automatic navigation capabilities, enabling flexible movement and preventing safety accidents.

[0106] While this invention can operate on pouch lithium batteries of different specifications simultaneously, in practical applications, the differences in specifications between the pouch lithium batteries should not be too large. This is to ensure that the mechanism operation of the equipment and the time difference in liquid injection and replenishment are not significant during liquid injection and replenishment. In addition, the liquid injection method adopted in this invention can refer to the spring clamp and conduit cooperation method disclosed in the invention patent with patent number 202311833771.4.

[0107] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. An intelligent liquid injection system for soft-pack lithium batteries, characterized in that: It includes a main control module, a transfer module, a replenishment module, a liquid filling and weighing module, and a sorting module, all of which are connected to the main control module via signals. The liquid injection and weighing module is used to inject liquid into the soft-pack lithium batteries and weigh them after injection to obtain the weight of each soft-pack lithium battery. The transfer module includes a transmission rail and several mobile trolleys movably mounted on the transmission rail. Each mobile trolley is equipped with at least one positioning module for accommodating soft-pack lithium batteries. The sorting module is used to sort the soft-pack lithium batteries according to their weight, and to put the sorted soft-pack lithium batteries into a mobile cart. The liquid replenishment module is used to replenish liquid for soft-pack lithium batteries that do not meet the weight requirements; The sorting module includes multiple sorting robots. Each injection device is configured to correspond to at least one sorting robot. The actions of the sorting robots include: Obtain the weight of each pouch lithium battery inside the vehicle; Based on the weight information, put the qualified soft-pack lithium batteries into the first container and put the unqualified soft-pack lithium batteries into the second container. Remove the vacant vehicle from the transmission mechanism and use it as a backup first / second container; The sorting module also includes a transfer mechanism, which comprises a weighing platform, a transfer module, and two lifting modules. The weighing platform is used to support the vehicle, and the liquid injection weighing module is installed on the weighing platform; The lifting module includes a lifting base, a lifting drive component, and a lifting frame. The lifting frame is movably mounted on the lifting base. The lifting drive component is used to drive the lifting frame to move up and down relative to the lifting base. The lifting frame has multiple accommodating slots arranged in parallel. The accommodating slots are used to accommodate empty vehicles. The transfer module is used to move empty vehicles into one of the lifting modules for storage; The receiving slot is equipped with a first transmission module and a second transmission module; the sorting module operates in the following ways: Weigh each soft-pack lithium battery inside the vehicle on a weighing platform; After the soft-pack lithium batteries are weighed, the carrier is transferred to the transfer module, where the sorting robot sorts the soft-pack lithium batteries according to the weighing results. The number of vehicles in each lifting module is counted, and the lifting module with the fewest vehicles is selected. The lifting seat is raised and lowered by the lifting drive component so that the empty receiving slot is directly opposite the transfer module; The first transmission module, in conjunction with the transfer module, drives the carrier to move from the weighing platform into the empty receiving slot; When the first container / second container is full, the full first container / second container is transferred to the mobile trolley, and then the empty vehicle is moved out by the second transfer module for use as the first container / second container.

2. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The electrolyte filling and weighing module includes several electrolyte filling devices, each including a transmission mechanism, a barcode scanning mechanism, an electrolyte filling mechanism, and a weighing mechanism. The transmission mechanism is used to transmit the carrier containing the soft-pack lithium battery. The barcode scanning mechanism is used to scan the carrier to obtain information about the soft-pack lithium battery on the carrier. The electrolyte filling mechanism is used to inject a preset amount of electrolyte into the soft-pack lithium battery according to the information obtained by the barcode scanning mechanism. The weighing mechanism is used to weigh the soft-pack lithium battery after electrolyte filling.

3. The intelligent liquid injection system for soft-pack lithium batteries according to claim 2, characterized in that: The carrier is equipped with multiple compartments for accommodating pouch lithium batteries, and each compartment has a weight sensor installed on its inner bottom wall; a conductive component is installed on one side of the carrier, and the liquid injection weighing module operates as follows: Obtain the vehicle's location information; Connect the conductive parts of the positioned vehicle to power the weight sensor through the conductive parts; Obtain weight information from each weight sensor; Bind weight information to vehicle information; The soft-pack lithium batteries are separated from the conductive components and then sorted by the sorting module.

4. The intelligent liquid injection system for soft-pack lithium batteries according to claim 3, characterized in that: The operation mode of the injection device includes: The vehicle's identity information is obtained through a scanning mechanism, and the initial weight and expected liquid injection volume of each soft-pack lithium battery are obtained from the vehicle's identity information. The liquid injection mechanism performs liquid injection on the soft-pack lithium battery according to its specifications and the desired liquid injection volume; where the actual liquid injection volume = k * desired liquid injection volume, k is a constant and 1≤k≤1.1; The actual weight of each soft-pack lithium battery inside the vehicle is obtained by weighing mechanism, and the weight change of each soft-pack lithium battery is calculated. Convert the weight change value into the amount of electrolyte in the pouch lithium battery; The electrolyte volume is compared with a preset value, and the lithium batteries are classified according to the comparison results.

5. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The transfer module includes a first transmission mechanism, a reversing platform, a second transmission mechanism, and a vision device. The first transmission mechanism is used to transfer the vehicle from the weighing platform to the reversing platform. The second transmission mechanism is disposed on the reversing platform, which has a lifting mechanism for driving the second transmission mechanism to move up and down. The second transmission mechanism is used to transfer the vehicle from the reversing platform to the lifting module. The vision device is used to identify whether the receiving slot facing the reversing platform is empty, thereby ensuring that the vehicle safely enters the receiving slot.

6. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The fluid replenishment module includes functions for performing the following steps: Scan the identification code on the mobile vehicle to obtain the required weight of each soft-pack lithium battery on the vehicle; Weigh each pouch lithium battery inside the vehicle to obtain the actual weight of the pouch lithium battery. Add electrolyte to the pouch lithium batteries until each pouch lithium battery reaches the required weight. If the actual weight of the soft-pack lithium battery remains at the required level after a preset resting time, then no further liquid replenishment will be required; otherwise, liquid replenishment will continue.

7. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The mobile vehicle is an AGV (Automated Guided Vehicle).

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