Intelligent liquid injection system for soft package lithium battery

Abstract

The invention relates to the technical field of soft package lithium batteries, in particular to a soft package lithium battery intelligent liquid injection system which comprises a main control module, a transferring module, a liquid supplementing module, a liquid injection weighing module and a sorting module, and the transferring module, the liquid supplementing module, the liquid injection weighing module and the sorting module are all in signal connection with the main control module. The soft package lithium battery is weighed after liquid injection; the transferring module comprises a transmission guide rail and moving trolleys movably arranged on the transmission guide rail, and each moving trolley is provided with a positioning module; the sorting module is used for sorting the soft package lithium batteries according to the weight of the soft package lithium batteries and putting the soft package lithium batteries into the moving trolley; and the liquid supplementing module is used for carrying out liquid supplementing treatment on the soft package lithium battery with the weight not reaching the standard. Liquid injection of the soft package lithium batteries and weighing after liquid injection are achieved through the liquid injection weighing module, then the soft package lithium batteries are sorted, qualified soft package lithium batteries are transferred to the next station, unqualified soft package lithium batteries are transferred to the next station after liquid injection, and the working mode is flexible and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack lithium batteries, and in particular to an intelligent liquid injection system for soft-pack lithium batteries. Background Art

[0002] One of the core processes of soft-pack lithium batteries is liquid injection, that is, injecting electrolyte into soft-pack lithium batteries, using electrolyte as a medium for energy storage and release. However, the existing soft-pack lithium battery liquid injection methods are mostly carried out in an assembly line manner, that is, the liquid injection system can only inject the same amount of electrolyte into a soft-pack lithium battery of one specification at a time. If the liquid injection volume of a soft-pack lithium battery is insufficient, it needs to be replenished. At this time, generally all the same batches are transferred to the liquid replenishment equipment, or the soft-pack lithium battery is transferred to the liquid replenishment equipment alone.

[0003] No matter which method is used, it is obviously not efficient. Summary of the invention

[0004] In view of the problems of the prior art, the present invention provides an intelligent liquid injection system for soft-pack lithium batteries, which can sort the soft-pack lithium batteries through system coordination and only transfer the soft-pack lithium batteries that need liquid injection for injection, thereby improving flexibility and efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present 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 connected to the main control module by signal.

[0007] The liquid filling and weighing module is used to fill the soft-pack lithium battery with liquid, and weigh the soft-pack lithium battery after the liquid filling to obtain the weight of each soft-pack lithium battery;

[0008] The transfer module includes a transmission rail and a plurality of mobile carts movably arranged on the transmission rail, and each mobile cart is provided 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 the mobile vehicle;

[0010] The rehydration module is used to rehydrate soft-pack lithium batteries that do not meet the weight standards.

[0011] Furthermore, the liquid filling and weighing module includes a plurality of liquid filling devices, which include a transmission mechanism, a code scanning mechanism, a liquid filling mechanism and a weighing mechanism. The transmission mechanism is used to transmit a carrier for accommodating soft-pack lithium batteries, the code scanning mechanism is used to scan the carrier to obtain information of the soft-pack lithium batteries on the carrier, the liquid filling mechanism is used to inject a preset amount of electrolyte into the soft-pack lithium batteries based on the information obtained by the code scanning mechanism, and the weighing mechanism is used to weigh the soft-pack lithium batteries after liquid filling.

[0012] Furthermore, the carrier is provided with a plurality of slots for accommodating soft-pack lithium batteries, and a weight sensor is provided on the inner bottom wall of each slot; a conductive member is provided on one side of the carrier, and the working mode of the weighing module includes:

[0013] Get the vehicle's arrival information;

[0014] Connect the conductive parts of the carrier in place, and power the weight sensor through the conductive parts;

[0015] Obtain weight information fed back by each weight sensor;

[0016] Bind the weight information with the vehicle information;

[0017] Separated from the conductive parts, the soft-pack lithium batteries in the carrier are then sorted by the sorting module.

[0018] Furthermore, the working method of the liquid injection device includes:

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

[0020] The liquid injection mechanism performs liquid injection processing 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;

[0021] The actual weight of each soft-pack lithium battery in the carrier is obtained by a weighing mechanism, and the weight change of each soft-pack lithium battery is calculated;

[0022] Convert the weight change value into the amount of solution in the soft-pack lithium battery;

[0023] Compare the solution volume with the preset value and classify the lithium batteries according to the comparison results.

[0024] Furthermore, the sorting module includes a plurality of sorting robots, and one liquid injection device is provided corresponding to at least one sorting robot. The actions of the sorting robot include:

[0025] Get the weight of each soft-pack lithium battery in the vehicle;

[0026] According to the weight information, the soft-pack lithium batteries with qualified weight are placed in the first container, and the soft-pack lithium batteries with unqualified weight are placed in the second container;

[0027] Remove the empty carrier from the conveying mechanism and use it as a spare first container / second container.

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

[0029] The weighing platform is used to support the carrier, and the weighing module is arranged on the weighing platform;

[0030] The lifting module includes a lifting seat, a lifting drive and a lifting frame, wherein the lifting frame is movably arranged on the lifting seat, the lifting drive is used to drive the lifting frame to rise and fall relative to the lifting seat, and the lifting frame is provided with a plurality of accommodating grooves in parallel, and the accommodating grooves are used to accommodate empty carriers;

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

[0032] Furthermore, a first transmission module and a second transmission module are provided in the receiving groove; the action mode of the sorting module includes:

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

[0034] The weighed soft-pack lithium battery carrier is transferred to the transfer module, and the sorting robot sorts the soft-pack lithium battery according to the weighing results;

[0035] Obtain the number of vehicles in each lifting module for statistics, and select the lifting module with the least number of vehicles;

[0036] The lifting seat is controlled by the lifting driving member to move up and down so that the empty receiving slot is directly opposite to the transfer module;

[0037] The first transmission module cooperates with the transfer module to drive the carrier from the weighing platform to the empty containing tank;

[0038] When the first container / the second container is fully loaded, the fully loaded first container / the second container is transferred to the mobile vehicle, and then the empty carrier is moved out by the second transmission module to be used as the first container / the second container.

[0039] Furthermore, the transfer module includes a first transmission mechanism, a reversing platform, a second transmission mechanism and a visual device. The first transmission mechanism is used to transfer the carrier from the weighing platform to the reversing platform. The second transmission mechanism is arranged on the reversing platform. The reversing platform has a lifting mechanism for driving the second transmission mechanism to lift and lower. The second transmission mechanism is used to transfer the carrier from the reversing platform to the lifting module.

[0040] Furthermore, the fluid infusion module includes a step for performing the following steps:

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

[0042] Weigh each soft-pack lithium battery in the vehicle to obtain the actual weight of the soft-pack lithium battery;

[0043] Refill the soft-pack lithium batteries until each soft-pack lithium battery reaches the required weight;

[0044] The soft-pack lithium battery is stationary for a preset time. If the actual weight of the soft-pack lithium battery still maintains the required weight, no more refilling is performed. Otherwise, refilling continues.

[0045] Furthermore, the mobile vehicle is an AGV vehicle.

[0046] Beneficial effects of the present invention: The present invention is coordinated through the main control module, and the liquid injection and weighing after the liquid injection of the soft-pack lithium battery are realized through the liquid injection and weighing module, and then the soft-pack lithium battery is sorted, and the qualified soft-pack lithium battery is transferred to the next station, and the unqualified soft-pack lithium battery is transferred to the next station after the liquid is replenished. The working method is flexible and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a principle block diagram of the present invention.

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

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

[0050] Figure 4 A schematic diagram of the lifting module of the present invention.

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

[0052] Figure numerals: 1—main control module, 2—transfer module, 3—liquid replenishment module, 4—liquid injection and weighing module, 5—sorting module, 6—carrier, 21—transmission guide rail, 22—moving trolley, 23—positioning module, 40—liquid injection equipment, 41—transmission mechanism, 42—barcode scanning mechanism, 43—liquid injection mechanism, 44—weighing mechanism, 51—sorting robot, 52—weighing platform, 53—transfer module, 54—lifting module, 61—receiving tank, 62—weight sensor, 63—conductive part, 531—first transmission mechanism, 532—reversing platform, 533—second transmission mechanism, 534—visual device, 541—lifting seat, 542—lifting drive member, 543—lifting frame, 544—receiving tank, 545—first transmission module, 546—second transmission module. DETAILED DESCRIPTION

[0053] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the 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 connected to the main control module 1 by signal.

[0055] The liquid filling and weighing module 4 is used to fill the soft-pack lithium battery with liquid and weigh the soft-pack lithium battery after the liquid filling to obtain the weight of each soft-pack lithium battery;

[0056] The transfer module 2 includes a transmission rail 21 and a plurality of mobile carts 22 movably disposed on the transmission rail 21 , and each mobile cart 22 is provided 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 replenishing module 3 is used to replenish the soft-pack lithium batteries that do not meet the weight standards.

[0059] That is, the present invention adopts a "chain combined with island" approach, and the soft-pack lithium battery is preferably transmitted to the liquid filling and weighing module 4 through a conventional transmission module. After the liquid filling and weighing module 4 fills and weighs the soft-pack lithium battery, the sorting module 5 sorts the soft-pack lithium battery according to the weighing result, thereby separating the soft-pack lithium batteries with qualified weight and the soft-pack lithium batteries with unqualified weight (not heavy enough). Subsequently, part of the mobile carts 22 transfer the soft-pack lithium batteries with qualified weight to the next station, and the other part of the mobile carts 22 move the soft-pack lithium batteries with unqualified weight to the liquid replenishing module 3 for liquid replenishment, and then transfer them to the next station.

[0060] The present invention improves flexibility and intelligently realizes the sorting of soft-pack lithium batteries. The soft-pack lithium batteries that need to be replenished are replenished, and the soft-pack lithium batteries that do not need to be replenished are directly transferred to the next workstation. Since the number of soft-pack lithium batteries that usually need to be replenished is small, the effect of multiple injection devices 40 being equipped with one replenishment module 3 can be achieved, which effectively optimizes the components, saves space, and improves the operation efficiency.

[0061] In this embodiment, the injection weighing module 4 includes several injection devices 40, and the injection devices 40 include a transmission mechanism 41, a code scanning mechanism 42, an injection 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 code scanning mechanism 42 is used to scan the carrier 6 to obtain the information of the soft-pack lithium battery on the carrier 6, the injection mechanism 43 is used to inject a preset amount of electrolyte into the soft-pack lithium battery based on the information obtained by the code scanning mechanism 42, and the weighing mechanism 44 is used to weigh the soft-pack lithium battery after injection. 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 here.

[0062] That is, each carrier 6 has an identification code, preferably a QR code or a barcode. The identification code will be bound to the corresponding soft-pack lithium battery information when the soft-pack lithium battery is placed in the carrier 6. For example, if there are 6*6 slots 61 in the carrier 6, the coordinates of each slot 61 will be bound to the information of the soft-pack lithium battery after the soft-pack lithium battery is placed, so as to facilitate traceability and smooth implementation of subsequent processes. After the code is scanned, the injection mechanism 43 will inject the corresponding amount of electrolyte into the soft-pack lithium battery according to the information of the soft-pack lithium battery in each slot 61. The specifications and required amount of electrolyte of the soft-pack lithium battery in each slot 61 may be different. At this time, the information of the identification code is the key to accurate and smooth injection. After the injection, the carrier 6 will be transferred to the weighing mechanism 44 for weighing, specifically, the soft-pack lithium battery in each slot 61 is weighed to determine the number and position coordinates of qualified and unqualified soft-pack lithium batteries. After the weighing is completed, the sorting module sorts the soft-pack lithium batteries.

[0063] It should be noted that when weighing, unqualified soft-pack lithium batteries will be placed in the same container (hereinafter referred to as the second container), while qualified soft-pack lithium batteries will be placed in different containers (hereinafter referred to as the first container) according to specifications. After the soft-pack lithium batteries in the second container are replenished, they will be sorted again when they are transferred to the next station. This sorting is the action of the next station and will not be repeated here.

[0064] Specifically, the carrier 6 is provided with a plurality of mobile carts 22 for accommodating soft-pack lithium batteries, and a weight sensor 62 is provided on the inner bottom wall of each mobile cart 22; a conductive member 63 is provided on one side of the carrier 6, and the working mode of the weighing module includes:

[0065] Obtain the arrival information of vehicle 6;

[0066] Connect the conductive member 63 of the carrier 6 that is in place, and power the weight sensor 62 through the conductive member 63;

[0067] Obtaining 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 member 63 and then sorted by the sorting module 5 .

[0070] Furthermore, the working method of the liquid injection device 40 includes:

[0071] The identity information of the carrier 6 is obtained by the code scanning mechanism 42, and the initial weight and the expected liquid injection amount of each soft-pack lithium battery are obtained from the identity information of the carrier 6;

[0072] The liquid injection mechanism 43 performs liquid injection processing 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 the 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 solution in the soft-pack lithium battery;

[0075] Compare the solution volume with the preset value and classify the lithium batteries according to the comparison results.

[0076] That is, each carrier 6 has a built-in weight sensor 62, and under normal conditions, the weight sensor 62 is not powered and is not in a working state; when the injection is completed, the weighing mechanism 44 contacts the conductive member 63 and supplies power to the conductive member 63, so that each weight sensor 62 is powered and works, and the soft-pack lithium batteries in the corresponding container 61 are weighed respectively, so as to quickly obtain the actual weight of each soft-pack lithium battery; after obtaining and entering a stable and accurate weight value, the weighing mechanism 44 cuts off the power to the conductive member 63, and the soft-pack lithium batteries can be sorted and processed by the subsequent sorting module 5.

[0077] The injection volume of the present invention will be higher than the expected value, which is usually the minimum or middle value of the qualified injection interval. The constant k is set as a coefficient mainly because: electrolyte loss may occur due to various reasons during the injection process. The role of k is to further reduce the number of soft-pack lithium batteries with unqualified weight, thereby reducing the occurrence of liquid replenishment. The weight unqualified rate of soft-pack lithium batteries injected by the present invention is controlled within 5%.

[0078] It should be noted that the weight sensors 62 in the carrier 6 are arranged in parallel. When a weight sensor 62 is damaged, it will not be able to send a signal. At this time, the present invention will record the problem, and when the carrier 6 is used again in the future, the damaged weight sensor 62 will no longer be placed in the receiving slot 61; and 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 carrier 6), the carrier 6 will be sent away from the present invention in the next cycle and repaired or scrapped by the staff.

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

[0080] Obtaining the weight of each soft-pack lithium battery in the carrier 6;

[0081] According to the weight information, the soft-pack lithium batteries with qualified weight are placed in the first container, and the soft-pack lithium batteries with unqualified weight are placed in the second container;

[0082] The empty carrier 6 is taken away from the conveying mechanism 41 and used as a spare first container / second container.

[0083] The sorting robot 51 is of conventional structure and will not be described in detail here. The first container can be set according to the number of specifications of the soft-pack lithium batteries to be filled with liquid according to the present invention, such as three first containers and one second container in this embodiment. The sorting robot 51 has a corresponding visual module that can identify the coordinates of the soft-pack lithium batteries, so as to accurately pick up the soft-pack lithium batteries and put them into a suitable first container, achieving a fast and intelligent sorting effect.

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

[0085] The weighing platform 52 is used to support the carrier 6, and the weighing module is arranged on the weighing platform 52;

[0086] The lifting module 54 includes a lifting seat 541, a lifting driving member 542 and a lifting frame 543. The lifting frame 543 is movably disposed on the lifting seat 541. The lifting driving member 542 is used to drive the lifting frame 543 to rise and fall relative to the lifting seat 541. The lifting frame 543 is provided with a plurality of accommodating grooves 544 in parallel. The accommodating grooves 544 are used to accommodate an empty carrier 6.

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

[0088] In actual use, the first transmission module 545 and the second transmission module 546 are disposed in the receiving groove 544; the operation modes of the sorting module include:

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

[0090] The carrier 6 after weighing the soft-pack lithium battery is transferred to the transfer module 53, and the sorting robot 51 sorts the soft-pack lithium battery according to the weighing result;

[0091] Obtain the number of carriers 6 in each lifting module 54 and perform statistics, and select the lifting module 54 with the least number of carriers 6;

[0092] The lifting seat 541 is controlled by the lifting driving member 542 to move up and down so that the empty receiving slot 544 is directly opposite to the transfer module 53;

[0093] The first transmission module 545 cooperates with the transfer module 53 to drive the carrier 6 to move from the weighing platform 52 into the empty receiving groove 544;

[0094] When the first container / the second container is fully loaded, the fully loaded first container / the second container is transferred to the mobile vehicle 22, and then the empty carrier 6 is moved out through the second transmission module 546 to be used as the first container / the second container.

[0095] A plurality of first containers can be configured at different positions according to actual needs, while only one second container is required. The ratio of the first container to the second container 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 empty carrier 6 will be placed in the accommodating groove 544 as the first container / second container; and the carrier 6 transferred to the next workstation will also be circulated and used as a carrier 6 that is not filled with liquid, so that the utilization rate of the carrier 6 is further improved.

[0097] Specifically, the transfer module 53 includes a first transmission mechanism 531, a reversing platform 532, a second transmission mechanism 53341 and a visual device 534. The first transmission mechanism 531 is used to transfer the carrier 6 from the weighing platform 52 to the reversing platform 532. The second transmission mechanism 53341 is arranged on the reversing platform 532. The reversing platform 532 has a lifting mechanism for driving the second transmission mechanism 53341 to lift and lower. The second transmission mechanism 53341 is used to transfer the carrier 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 53341 are both conventional linear transmission modules, and the structure of the reversing table 532 belongs to a conventional transmission module; and the visual device 534 adopts an industrial camera, which is specifically used to identify whether the receiving slot 544 facing the reversing table 532 is empty at this time, thereby ensuring that the carrier 6 safely enters the receiving slot 544.

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

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

[0101] Weighing each soft-pack lithium battery in the carrier 6 to obtain the actual weight of the soft-pack lithium battery;

[0102] Refill the soft-pack lithium batteries until each soft-pack lithium battery reaches the required weight;

[0103] The soft-pack lithium battery is stationary for a preset time. If the actual weight of the soft-pack lithium battery still maintains the required weight, no more refilling is performed. Otherwise, refilling continues.

[0104] That is, weighing is still required before refilling to determine the actual weight of each soft-pack lithium battery, and the corresponding electrolyte can be supplemented according to the weight of each soft-pack lithium battery during subsequent refilling. That is, each refilling position in the refilling module 3 works independently and does not interfere with each other.

[0105] Furthermore, the mobile vehicle 22 is an AGV vehicle with an automatic navigation function, which enables flexible movement and avoids safety accidents.

[0106] Although the present invention can operate soft-pack lithium batteries of different specifications at the same time, the specifications of soft-pack lithium batteries in actual applications should not be too different, which is conducive to the small differences in the mechanism action and injection and replenishment time of the equipment during injection and replenishment. In addition, the injection method adopted by the present invention can refer to the method of spring clip and catheter cooperation disclosed in the invention patent No. 202311833771.4.

[0107] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution 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 liquid replenishment module, a liquid injection weighing module and a sorting module, all of which are connected to the main control module signal. The liquid filling and weighing module is used to fill the soft-pack lithium battery with liquid, and weigh the soft-pack lithium battery after the liquid filling to obtain the weight of each soft-pack lithium battery; The transfer module includes a transmission rail and a plurality of mobile carts movably arranged on the transmission rail, and each mobile cart is provided 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 the mobile vehicle; The rehydration module is used to rehydrate soft-pack lithium batteries that do not meet the weight standards.

2. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The liquid filling and weighing module includes a plurality of liquid filling devices, and the liquid filling devices include a transmission mechanism, a code scanning mechanism, a liquid filling mechanism and a weighing mechanism. The transmission mechanism is used to transmit a carrier accommodating soft-pack lithium batteries, the code scanning mechanism is used to scan the carrier to obtain information of the soft-pack lithium batteries on the carrier, the liquid filling mechanism is used to inject a preset amount of electrolyte into the soft-pack lithium batteries based on the information obtained by the code scanning mechanism, and the weighing mechanism is used to weigh the soft-pack lithium batteries after liquid filling.

3. The intelligent liquid injection system for soft-pack lithium batteries according to claim 2, characterized in that: The carrier is provided with a plurality of slots for accommodating soft-pack lithium batteries, and a weight sensor is provided on the inner bottom wall of each slot; a conductive member is provided on one side of the carrier, and the working mode of the weighing module includes: Get the vehicle's arrival information; Connect the conductive parts of the carrier in place, and power the weight sensor through the conductive parts; Obtain weight information fed back by each weight sensor; Bind the weight information with the vehicle information; Separated from the conductive parts, the soft-pack lithium batteries in the carrier are then sorted by the sorting module.

4. The intelligent liquid injection system for soft-pack lithium batteries according to claim 3 is characterized in that: The working mode of the liquid injection device includes: The identity information of the carrier is obtained through a code scanning mechanism, and the initial weight and expected liquid injection volume of each soft-pack lithium battery are obtained from the identity information of the carrier; The liquid injection mechanism performs liquid injection processing 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; The actual weight of each soft-pack lithium battery in the carrier is obtained by a weighing mechanism, and the weight change of each soft-pack lithium battery is calculated; Convert the weight change value into the amount of solution in the soft-pack lithium battery; Compare the solution volume with the preset value and classify the lithium batteries according to the comparison results.

5. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The sorting module includes multiple sorting robots. One liquid injection device is set corresponding to at least one sorting robot. The actions of the sorting robot include: Get the weight of each soft-pack lithium battery in the vehicle; According to the weight information, the soft-pack lithium batteries with qualified weight are placed in the first container, and the soft-pack lithium batteries with unqualified weight are placed in the second container; Remove the empty carrier from the conveying mechanism and use it as a spare first container / second container.

6. The intelligent liquid injection system for soft-pack lithium batteries according to claim 5, characterized in that: The sorting module also includes a transfer mechanism, which includes a weighing platform, a transfer module and two lifting modules. The weighing platform is used to support the carrier, and the weighing module is arranged on the weighing platform; The lifting module includes a lifting seat, a lifting drive and a lifting frame, wherein the lifting frame is movably arranged on the lifting seat, the lifting drive is used to drive the lifting frame to rise and fall relative to the lifting seat, and the lifting frame is provided with a plurality of accommodating grooves in parallel, and the accommodating grooves are used to accommodate empty carriers; The transfer module is used to move an empty carrier into one of the lifting modules for storage.

7. The intelligent liquid injection system for soft-pack lithium batteries according to claim 6, characterized in that: The first transmission module and the second transmission module are arranged in the receiving groove; the action mode of the sorting module includes: Weigh each soft-pack lithium battery in the carrier on a weighing platform; The weighed soft-pack lithium battery carrier is transferred to the transfer module, and the sorting robot sorts the soft-pack lithium battery according to the weighing results; Obtain the number of vehicles in each lifting module for statistics, and select the lifting module with the least number of vehicles; The lifting seat is controlled by the lifting driving member to move up and down so that the empty receiving slot is directly opposite to the transfer module; The first transmission module cooperates with the transfer module to drive the carrier from the weighing platform to the empty containing tank; When the first container / the second container is fully loaded, the fully loaded first container / the second container is transferred to the mobile vehicle, and then the empty carrier is moved out by the second transmission module to be used as the first container / the second container.

8. The intelligent liquid injection system for soft-pack lithium batteries according to claim 6, characterized in that: The transfer module includes a first transmission mechanism, a reversing platform, a second transmission mechanism and a visual device. The first transmission mechanism is used to transfer the carrier from the weighing platform to the reversing platform. The second transmission mechanism is arranged on the reversing platform. The reversing platform has a lifting mechanism for driving the second transmission mechanism to lift and lower. The second transmission mechanism is used to transfer the carrier from the reversing platform to the lifting module.

9. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The fluid replenishment module includes a module for performing the following steps: Scan the identification code of the carrier on the mobile cart to obtain the required weight of each soft-pack lithium battery on the carrier; Weigh each soft-pack lithium battery in the vehicle to obtain the actual weight of the soft-pack lithium battery; Refill the soft-pack lithium batteries until each soft-pack lithium battery reaches the required weight; The soft-pack lithium battery is stationary for a preset time. If the actual weight of the soft-pack lithium battery still maintains the required weight, no more refilling is performed. Otherwise, refilling continues.

10. The intelligent liquid injection system for soft-pack lithium batteries according to claim 1, characterized in that: The mobile vehicle is an AGV vehicle.

Images