Automatic electrolyte supplementing device and method

Abstract

The invention provides an automatic electrolyte supplementing device and method. The automatic electrolyte supplementing device comprises a electrolyte supplementing workbench, and the electrolyte supplementing workbench comprises a vacuum positive pressure system, an industrial personal computer, an electric control system and a variable electrolyte injection system and is provided with a weighing system; an electrolyte treatment group is arranged on the working table, the electrolyte treatment group is communicated with the vacuum positive pressure system, a variable pump is arranged at the liquid inlet end of the variable liquid injection system, the liquid supplementing working table is communicated with the vacuum positive pressure system, and the variable liquid injection system, the electric control system and the vacuum positive pressure system are all electrically connected with the industrial personal computer; a liquid injection cup body is arranged at the outlet end of the variable pump, and electrolyte passing through the liquid injection cup body is supplemented into the variable liquid injection system through vacuum positive pressure circulation set by the vacuum positive pressure system; according to the device, the battery cell is vacuumized by the electrolyte in the electrolyte injection cup body through the vacuum positive pressure system, and then positive pressure is applied to the electrolyte injection cup body and the interior of the battery cell to press the electrolyte into the battery cell, so that the electrolyte performance of the battery cell and the electrolyte supplementing safety can be effectively ensured.

Description

[0001] The invention relates to the technical field of square shell lithium battery injection production, and in particular to an automatic electrolyte replenishing device and method. Background Art

[0002] At present, the electrolyte replenishment process of square shell lithium batteries is usually carried out manually by using a traditional syringe to replenish the battery cell. It is convenient and fast but has the following disadvantages: the syringe takes the electrolyte from a beaker exposed to a dehumidified environment. The electrolyte is easy to absorb water when stored for a long time and there is a great risk of being contaminated by foreign matter. The electrolyte replenished into the battery cell affects the actual performance of the battery cell; and this replenishment method usually involves two or even multiple replenishment operations due to the different capacities of the multiple-injection battery cells. After the battery cell is replenished, it is impossible to determine its single replenishment capacity, which easily leads to the risk of repeated processes and skipped processes. There are non-standard technical difficulties and certain safety hazards.

[0003] To achieve the above objectives, the present invention provides an automatic electrolyte replenishing device and method, which can solve the problems raised in the above background technology. Summary of the invention

[0004] The present invention adopts the following technical solutions to achieve:

[0005] An automatic electrolyte replenishment device and method, comprising a replenishment workbench, the replenishment workbench comprising a lateral positioning platform and a lateral adjustment platform, the top of the lateral adjustment platform is provided with a vacuum positive pressure system, an industrial computer, and an electric control system, the side of the lateral adjustment platform is provided with a variable injection system, and the lateral positioning platform is provided with a weighing system;

[0006] An electrolyte treatment group is provided on the lateral positioning platform, the electrolyte treatment group is connected to the vacuum positive pressure system, a variable pump is provided at the liquid inlet end of the variable injection system, the liquid replenishment workbench is connected to the vacuum positive pressure system, and the variable injection system, the electric control system, and the vacuum positive pressure system are all electrically connected to the industrial computer;

[0007] The output end of the variable pump is provided with a liquid injection cup body, and the liquid injection cup body replenishes the electrolyte passing through the variable liquid injection system through the vacuum positive pressure cycle set by the vacuum positive pressure system. The horizontal positioning platform is also provided with a bottom positioning group, and the variable liquid injection system and the bottom positioning group cooperate to inject the electrolyte into the battery cell;

[0008] The lateral adjustment platform is provided with a dust removal box, and the transverse positioning platform is provided with a recovery groove.

[0009] Preferably, the electrolyte processing group includes a cage-type fixing frame fixed on the horizontal positioning platform, and the cage-type fixing frame is provided with an exhaust tank and a liquid storage tank distributed up and down, and the exhaust tank is connected to the vacuum positive pressure system, and the exhaust tank is used to perform stirring vacuum extraction on the electrolyte.

[0010] Preferably, the variable injection system comprises a liquid injection box, a transverse lateral balancing groove is provided on the lateral adjustment platform, and the liquid injection box is slidably connected in the lateral balancing groove; the variable pump is fixedly connected to the liquid injection box, and a lateral push cylinder is provided on the side of the liquid injection box for upward and downward movement, and a split weighing group is provided on both sides of the base of the lateral push cylinder, and a liquid injection hanging plate is provided on the split weighing group, and a top locking rail is provided on the top of the liquid injection hanging plate, and a plurality of liquid injection pipes are connected inside the top locking rail, and the liquid injection pipes are sealedly connected to the vacuum positive pressure system and the liquid injection cup body;

[0011] The contact area between the front end of the injection tube and the injection port of the battery core is a sealed structure.

[0012] Preferably, a longitudinal meshing groove is provided on the liquid injection box, and the longitudinal meshing groove and the movable end of the lateral push cylinder are meshed with each other to be driven in an up and down meshing manner, and the exit cylinder end of the lateral push cylinder is contact-pushed with the liquid injection hanging plate.

[0013] Preferably, the split weighing group includes lateral support plates installed on both sides of the lateral push cylinder, the liquid injection hanging plate is provided with a slot, one end of the two lateral support plates extends into the slot and is connected with a tensile test plate, an inner test plate is connected below the tensile test plate, and the inner test plate is fixed to the inner wall of the liquid injection hanging plate.

[0014] Preferably, the top locking rail has locking pieces at even intervals inside, the liquid inlet end of the injection pipe is connected to a pipe groove pile, and a single pipe groove pile is connected to a single locking piece; a plurality of catheter positioning frames are provided on the injection box, and the catheter positioning frames and the pipe groove piles are both used to fix the catheter;

[0015] The injection hanging plate is provided with a transverse traverse groove, and one side of the injection pipe is provided with an adaption plate that slides in cooperation with the traverse groove.

[0016] Preferably, the bottom positioning group includes an electrostatic isolation area, and an end positioning groove is respectively provided on both sides of the electrostatic isolation area, a plurality of gap positioning grooves are evenly spaced between the two end positioning grooves, and an auxiliary positioning groove is provided on the side connecting the gap positioning grooves, and partitions are provided inside the gap positioning grooves and the end positioning grooves, and the distance between two adjacent partitions is equal to the thickness of a single battery cell.

[0017] Preferably, positioning piles are provided at both ends of the partition, which cooperate with the end positioning grooves and the gap positioning grooves and the end points of the partition, an upwardly set infrared locator is provided inside the positioning pile, and a strip-shaped infrared receiving plate is provided at the bottom of the variable injection system.

[0018] Preferably, the lateral adjustment platform is further provided with a lateral cylinder group, the lateral cylinder group comprises a plurality of split cylinders, and the split cylinders are individually connected to an adjustment split block.

[0019] An automatic electrolyte replenishment device method comprises the following steps: S1, quantitative weighing: taking a battery cell component, placing it in the weighing system to identify how many battery cells it is (different battery cell model groups), calculating the weight of the electrolyte to be replenished by the industrial computer, and transmitting the replenishment signal to the variable pump by the industrial computer;

[0020] S2, electrolyte treatment: Open the electrolyte treatment group to perform bubble exhaust treatment in advance, pump the electrolyte from the liquid storage tank to the exhaust tank, connect the vacuum positive pressure system, and apply stirring action while vacuuming to exhaust the bubbles, and then guide them back to the liquid storage tank for standby use;

[0021] S3, fixing the battery cell: the N-injection battery cell of the determined model is fixed at the circumferential side by the bottom positioning group, and the variable injection system is moved to connect the injection end with the injection port of the battery cell and seal it;

[0022] S4, vacuum filling of battery cells: Turn on the vacuum positive pressure system, and fill the required electrolyte measured by the weighing system into the filling cup. The electrolyte in the filling cup is filled into the battery cell through the set vacuum positive pressure cycle;

[0023] S5, Review: Use the weighing system to perform a second weight check on the battery cell after liquid injection to determine whether the liquid injection weight is within the required range, and automatically upload the liquid injection information to the MES system for record through the industrial computer;

[0024] S6. Dust removal: After the refilling is completed, the variable injection system is moved to the dust removal box for normalized dust removal to restore the dust-free state of the injection end of the variable injection system.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The injection principle of the present invention is: the electrolyte in the injection cup is evacuated to the battery cell through a vacuum positive pressure system, and then positive pressure is applied to the injection cup and the battery cell to inject the electrolyte into the battery cell, thereby avoiding the problem of electrolyte being invaded by foreign matter and causing the performance of the battery cell to decrease due to the problem of the injector itself;

[0027] The electrolyte is pre-treated and pressure-type vacuum filled through the sealed electrolyte treatment group, which reduces the exposure risk and implements closed protection for the entire electrolyte transportation process, thus ensuring the performance of the electrolyte.

[0028] At the same time, the electrolyte is fully protected and the volume of liquid filled in a single time is precisely controlled, which can realize the one-time filling of electrolyte in a standardized process, avoid the occurrence of secondary filling and multiple filling, standardize the process, reduce the occurrence of overflow caused by skipping the process or repeating the process, and improve the safety of operation;

[0029] This device fixes the filling method of multiple-injection battery cells through secondary weight measurement and a proprietary mode of fixing. It can accurately fill N-injection battery cells at one time to meet the injection requirements of different battery cells, and can effectively improve the use range of this device. At the same time, the split weighing group inside the variable injection system is used to perform a secondary check on the internal stock electrolyte transported by the pipeline, which can more accurately control the single electrolyte filling amount, eliminate the error of the internal stock of the variable injection system on the final electrolyte content inside the battery cell, and facilitate the comparison of the secondary weighing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention (in a state where the pipeline is not connected);

[0031] Figure 2 This is a schematic diagram of the structure of the present invention after the battery core is fixed (without connecting the pipeline);

[0032] Figure 3 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0033] Figure 4 For the present invention Figure 2 A schematic diagram of the structure at B in FIG.

[0034] Figure 5 For the present invention Figure 1 Schematic diagram of the enlarged structure at position C in FIG.

[0035] In the figure: 1. Fluid filling workbench; 2. Variable fluid injection system; 3. Electronic control system; 4. Vacuum positive pressure system; 5. Industrial computer; 6. Weighing system; 7. Variable pump;

[0036] 101. lateral positioning platform; 102. lateral adjustment platform;

[0037] 103. Bottom positioning group; 104. Side cylinder group; 105. Recovery tank;

[0038] 106. electrolyte treatment group; 107. cage fixing frame; 108. exhaust tank; 109. liquid storage tank;

[0039] 110, electrostatic isolation area; 111, end positioning groove; 112, gap positioning groove; 113, auxiliary positioning groove; 114, partition; 115, positioning pile; 116, split cylinder; 117, adjustment split block; 118, infrared locator; 119; lateral balance groove;

[0040] 201, liquid injection box; 202, longitudinal meshing groove; 203, lateral push cylinder; 204, split weighing group; 205, lateral support plate; 206, tensile test plate;

[0041] 208, liquid injection hanging plate; 209, top locking rail; 210, pipe slot pile; 211, liquid injection pipe; 212, transverse slot; 213, adaptation plate; 214, catheter positioning frame;

[0042] 701. Liquid injection cup body. DETAILED DESCRIPTION

[0043] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0044] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0047] In one embodiment of the present invention:

[0048] Please refer to the attached Figure 1-3, including a fluid replenishment workbench 1, the fluid replenishment workbench 1 includes a lateral positioning platform 101 and a lateral adjustment platform 102, the top of the lateral adjustment platform 102 is provided with a vacuum positive pressure system 4, an industrial computer 5, and an electronic control system 3, the side of the lateral adjustment platform 102 is provided with a variable injection system 2, and the lateral positioning platform 101 is provided with a weighing system 6;

[0049] The horizontal positioning platform 101 is provided with an electrolyte treatment group 106, and the electrolyte treatment group 106 is connected to the vacuum positive pressure system 4. The variable liquid injection system 2 is provided with a variable pump 7 at the liquid inlet end. The liquid replenishment workbench 1 is connected to the vacuum positive pressure system 4. The variable liquid injection system 2, the electronic control system 3, and the vacuum positive pressure system 4 are all electrically connected to the industrial computer 5.

[0050] The output end of the variable pump 7 is provided with a liquid injection cup 701, and the liquid injection cup 701 replenishes the electrolyte into the variable liquid injection system 2 through the vacuum positive pressure cycle set by the vacuum positive pressure system 4. The horizontal positioning platform 101 is also provided with a bottom positioning group 103, and the variable liquid injection system 2 and the bottom positioning group 103 cooperate to inject the electrolyte into the battery cell. The working principle of the variable liquid injection pump of the device is that the industrial control software gives the liquid replenishment amount value to the electronic control box of the liquid injection pump, and the electronic control box automatically calculates the number of revolutions of the liquid injection pump and adjusts the swing angle accordingly. Liquid injection amount = number of revolutions x single-turn liquid injection amount (the larger the swing angle of the liquid injection pump, the larger the single-turn liquid injection amount). Through the liquid injection software of the industrial control computer 5, it is connected to the terminal MES system to automatically calculate how much electrolyte needs to be injected into each battery cell;

[0051] The lateral adjustment platform 102 is provided with a dust removal box, and the lateral positioning platform 101 is provided with a recovery tank 105; the electrolyte treatment group 106 includes a cage-type fixing frame 107 fixed on the lateral positioning platform 101, and the cage-type fixing frame 107 is provided with an exhaust tank 108 and a liquid storage tank 109 distributed in an upper and lower manner. The exhaust tank 108 is connected to the vacuum positive pressure system 4, and the exhaust tank 108 is used for stirring vacuum extraction of the electrolyte; the electrolyte needs to be treated with bubble removal in advance, which is completed by the upper and lower tanks. The electrolyte is first pumped to the upper stirring tank, and the bubbles are discharged by vacuuming + stirring (to ensure the accuracy of the injection weight). After the treatment, the electrolyte flows to the lower liquid storage tank 109 for standby;

[0052] An automatic electrolyte replenishment device method comprises the following steps: S1, quantitative weighing: take a battery cell component, place it on the weighing system 6, the system identifies how many batteries it is (different battery cell model groups), calculates the weight of the electrolyte to be replenished through the industrial computer 5, and transmits the replenishment signal to the variable pump 7 through the industrial computer 5; after the battery cell to be charged is scanned and weighed, the industrial control software of the industrial computer 5 obtains the battery cell data information by connecting to the MES system, and calculates the weight of the electrolyte to be replenished according to the weighed weight;

[0053] S2, electrolyte treatment: Open the electrolyte treatment group 106 to perform bubble removal in advance, the electrolyte is pumped to the exhaust tank 108 through the liquid storage tank 109, and connected to the vacuum positive pressure system 4 to apply stirring action while vacuuming to exhaust the bubbles and then guide them back to the liquid storage tank 109 for standby;

[0054] S3, fixing the battery cell: the N-type battery cell with the determined model is fixed at the circumferential side by the bottom positioning group 103, and the variable injection system 2 is moved to connect the injection end with the injection port of the battery cell and seal it;

[0055] S4, vacuum filling of battery cell: start the vacuum positive pressure system 4, fill the required electrolyte quantitatively measured by the weighing system 6 into the filling cup 701, and the electrolyte in the filling cup 701 is filled into the battery cell through the set vacuum positive pressure cycle;

[0056] S5, review: the battery cell after liquid injection is weighed again using the weighing system 6 to check whether the liquid injection weight is within the required range, and the liquid injection information is automatically uploaded to the MES system for record through the industrial computer 5;

[0057] S6, dust removal: after the liquid replenishment is completed, the variable liquid injection system 2 is moved to the dust removal box for normalized dust removal, and the dust-free state of the liquid injection end of the variable liquid injection system 2 is restored. The dust removal device and the recovery tank 105 can adopt the commonly used existing technology, which is used to perform normalized protection on the filling device;

[0058] The electrolyte flows in the following manner: liquid storage tank 109-stirring tank-liquid storage tank 109-variable pump 7-diaphragm valve (switch)-liquid filling cup 701-pinch valve liquid filling nozzle-cell to be charged. The liquid filling principle is to use the vacuum positive pressure system 4 to evacuate the cell and then inject positive pressure into the liquid filling cup 701 and the inside of the cell to force the electrolyte into the cell. This can avoid the problem of the cell performance being reduced due to the invasion of foreign matter into the electrolyte caused by the problem of the syringe itself. The electrolyte is pre-treated and pressure-vacuumed by the sealed electrolyte treatment group 106. While reducing the original exposure risk, the entire electrolyte transportation process is closed and protected to ensure the performance of the electrolyte.

[0059] In yet another embodiment of the present invention:

[0060] Please refer to Figure 1 , Figure 2 , Figure 5 The variable injection system 2 includes a liquid injection box 201, a transverse lateral balancing groove 119 is provided on the lateral adjustment platform 102, and the liquid injection box 201 is slidably connected in the lateral balancing groove 119; the variable pump 7 is fixedly connected to the liquid injection box 201, and the liquid injection box 201 is provided with a lateral push cylinder 203 that can move upward and downward, and the base of the lateral push cylinder 203 is provided with a split weighing group 204 on both sides, and the split weighing group 204 is provided with a liquid injection hanging plate 208, and the top of the liquid injection hanging plate 208 is provided with a top locking rail 209, and a plurality of liquid injection pipes 211 are connected inside the top locking rail 209, and the liquid injection pipes 211 are sealed and connected to the vacuum positive pressure system 4 and the liquid injection cup body 701;

[0061] The contact area between the front end of the injection tube 211 and the injection port of the battery cell is a sealed structure;

[0062] The usage of variable injection system 2 is as follows: Figure 5 The electrolyte is supplied from the injection cup 701, and the corresponding sealed pipe section is connected to the corresponding pipe section using the catheter positioning frame 214 to fix the corresponding pipe section, and the upper and lower meshing positions of the lateral push cylinder 203 are changed. The lateral push cylinder 203 and the longitudinal meshing groove 202 are automatically damped and locked. The injection hanging plate 208 is supported by the split weighing group 204. The initial weight of the injection hanging plate 208 is recorded by the tensile test board 206 and then transmitted to the industrial control computer 5 for recording. According to the injection port position of the battery cell, the same number of injection ports are used. The injection pipe 211 and the pipe groove pile 210 drive the lateral push cylinder 203 to push out the distance, so that the injection pipe 211 corresponds to the injection port, moves downward so that the injection pipe 211 is sealed and docked with the battery cell injection port, opens the injection box 201 and the vacuum positive pressure system 4 connected thereto, fills the internal electrolyte into the battery cell, and compares the weight of the split weighing group 204 after filling with the previous weight. The injection is completed within the reasonable range of normal error, and then the weighing system 6 is rechecked.

[0063] The injection box 201 is provided with a longitudinal meshing groove 202, and the longitudinal meshing groove 202 and the movable end of the lateral push cylinder 203 are meshed with each other to be driven up and down, and the exit cylinder end of the lateral push cylinder 203 is pushed by the injection hanging plate 208 in a contact manner;

[0064] The split weighing group 204 includes lateral support plates 205 installed on both sides of the lateral push cylinder 203. The liquid injection hanging plate 208 is provided with a slot. One end of the two lateral support plates 205 extends into the slot and is connected to a tensile test plate 206. An inner test plate is connected below the tensile test plate 206. The inner test plate is fixed to the inner wall of the liquid injection hanging plate 208. The inner test plate is not shown in the figure. It is an internal structural part of the liquid injection hanging plate 208. It is in a downward pulling state with its own weight between the tensile test plate 206 and can be directly known by referring to the principle of a common tensile weight measuring instrument.

[0065] Among them, please pay special attention to Figure 2 , Figure 3 The top locking rail 209 has locking pieces spaced evenly apart inside, the liquid inlet end of the injection pipe 211 is connected to a pipe slot pile 210, and a single pipe slot pile 210 is connected to a single locking piece; a plurality of catheter positioning frames 214 are provided on the injection box 201, and the catheter positioning frames 214 and the pipe slot piles 210 are both used to fix the catheter; a transverse lateral displacement groove 212 is provided on the injection hanging plate 208, and an adaption plate 213 is provided on one side of the injection pipe 211 to slide with the lateral displacement groove 212, such as Figure 5 As shown, the three passages on the right are injection pipes 211 and pipe groove piles 210 with fixed spacing, the multiple passages on the left are uneven injection pipes 211 and pipe groove piles 210, and the three on the right are in a fixed position state.

[0066] In yet another embodiment of the present invention:

[0067] Please pay attention to Figure 3 , Figure 4 The bottom positioning group 103 includes an electrostatic isolation area 110, and an end positioning groove 111 is respectively provided on both sides of the electrostatic isolation area 110. A plurality of gap positioning grooves 112 are evenly spaced between the two end positioning grooves 111. Auxiliary positioning grooves 113 are provided in the lateral communication of the gap positioning grooves 112. Partition plates 114 are provided inside the gap positioning grooves 112 and the end positioning grooves 111, and the distance between two adjacent partition plates 114 is equal to the thickness of a single battery cell;

[0068] The two ends of the partition 114 are provided with positioning piles 115, which cooperate with the end positioning grooves 111, the gap positioning grooves 112 and the end points of the partition 114. The positioning piles 115 are provided with infrared locators 118 arranged upwards. The bottom of the variable injection system 2 is provided with a strip-shaped infrared receiving plate.

[0069] In addition, the lateral adjustment platform 102 is further provided with a lateral cylinder group 104, and the lateral cylinder group 104 includes a plurality of split cylinders 116, and each split cylinder 116 is independently connected with an adjustment split block 117, and the adjustment split block 117 is in a state of being independently extended;

[0070] Focus on reference Figure 3 , Figure 4 , when assembling the battery cell Figure 4 State, that is, the partition 114 inside the end positioning groove 111 on one side extends out of the grid, and the partition 114 at the corresponding position is lifted according to the specifications of the battery cell on the other side. Figure 4 The two partitions 114 in the three auxiliary positioning grooves 113 shown in the figure are placed in the auxiliary positioning grooves 113 when assembling the battery cell, and the other is the battery cell margin position, which is adaptively extended and fixed, and has a limited range, so as to facilitate the positioning adjustment with the lateral split cylinder 116;

[0071] At this time, the infrared device inside the extended part of the positioning pile 115 shows the position of the battery cell margin upward, which is convenient for the industrial computer 5 to drive the lateral cylinder group 104 to extend the split cylinder 116 within the corresponding range, and drive the block-type adjustment split block 117 to support the side of the battery cell. At the same time, it is convenient for the industrial computer 5 to calculate the number of injections of the battery cell's refilling port, providing a complete automated process.

[0072] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. An automatic electrolyte replenishing device, characterized in that: The invention comprises a fluid replenishment workbench (1), wherein the fluid replenishment workbench (1) comprises a lateral positioning platform (101) and a lateral adjustment platform (102); a vacuum positive pressure system (4), an industrial control computer (5), and an electric control system (3) are arranged on the top of the lateral adjustment platform (102); a variable fluid injection system (2) is arranged on the side of the lateral adjustment platform (102); and a weighing system (6) is arranged on the lateral positioning platform (101); An electrolyte treatment group (106) is provided on the lateral positioning platform (101), the electrolyte treatment group (106) is connected to the vacuum positive pressure system (4), a variable pump (7) is provided at the liquid inlet end of the variable injection system (2), the liquid replenishment workbench (1) is connected to the vacuum positive pressure system (4), and the variable injection system (2), the electric control system (3), and the vacuum positive pressure system (4) are all electrically connected to the industrial computer (5); The outlet end of the variable pump (7) is provided with a liquid injection cup (701), and the liquid injection cup (701) replenishes the electrolyte passing through the variable injection system (2) through the vacuum positive pressure cycle set by the vacuum positive pressure system (4), and the horizontal positioning platform (101) is also provided with a bottom positioning group (103); The lateral adjustment platform (102) is provided with a dust removal box, and the lateral positioning platform (101) is provided with a recovery groove (105).

2. The automatic electrolyte replenishing device according to claim 1, characterized in that: The electrolyte treatment group (106) includes a cage-type fixing frame (107) fixed on the horizontal positioning platform (101), and the cage-type fixing frame (107) is provided with an exhaust tank (108) and a liquid storage tank (109) distributed in an upper and lower manner. The exhaust tank (108) is connected to the vacuum positive pressure system (4), and the exhaust tank (108) is used to perform stirring vacuum extraction on the electrolyte.

3. The automatic electrolyte replenishing device according to claim 1, characterized in that: The variable injection system (2) comprises an injection box (201), a transverse lateral balancing groove (119) is provided on the lateral adjustment platform (102), and the injection box (201) is slidably connected in the lateral balancing groove (119); the variable pump (7) is fixedly connected to the injection box (201), and a lateral push cylinder (203) is provided on the side of the injection box (201) for upward and downward movement, and a split-type weighing group (204) is provided on both sides of the base of the lateral push cylinder (203), and an injection hanging plate (208) is provided on the split-type weighing group (204), and a top locking rail (209) is provided on the top of the injection hanging plate (208), and a plurality of injection pipes (211) are connected inside the top locking rail (209), and the injection pipes (211) are sealedly connected to the vacuum positive pressure system (4) and the injection cup body (701); The contact area between the front end of the liquid injection tube (211) and the liquid injection port of the battery core is a sealed structure.

4. The automatic electrolyte replenishing device according to claim 3, characterized in that: The liquid injection box (201) is provided with a longitudinal engagement groove (202), and the longitudinal engagement groove (202) and the movable end of the lateral push cylinder (203) are engaged with each other to be driven in an up-and-down engagement manner, and the exit cylinder end of the lateral push cylinder (203) and the liquid injection hanging plate (208) are pushed in a contact manner.

5. The automatic electrolyte replenishing device according to claim 4, characterized in that: The split weighing group (204) includes lateral support plates (205) installed on both sides of the lateral push cylinder (203), and the liquid injection hanging plate (208) is provided with a groove. One end of the two lateral support plates (205) extends into the groove and is connected to a tensile test plate (206). The tensile test plate (206) is connected to an inner test plate below, and the inner test plate is fixed to the inner wall of the liquid injection hanging plate (208).

6. The automatic electrolyte replenishing device according to claim 3, characterized in that: The top locking rail (209) has locking pieces at even intervals inside, the liquid inlet end of the liquid injection pipe (211) is connected to a pipe groove pile (210), and a single pipe groove pile (210) is connected to a single locking piece; a plurality of catheter positioning frames (214) are provided on the liquid injection box (201), and the catheter positioning frames (214) and the pipe groove pile (210) are both used to fix the catheter; The liquid injection hanging plate (208) is provided with a transverse lateral displacement groove (212), and one side of the liquid injection pipe (211) is provided with an adaption plate (213) which cooperates with the lateral displacement groove (212) for sliding.

7. The automatic electrolyte replenishing device according to claim 1, characterized in that: The bottom positioning group (103) comprises an electrostatic isolation area (110), and an end positioning groove (111) is respectively provided on both sides of the electrostatic isolation area (110), a plurality of gap positioning grooves (112) are evenly spaced between the two end positioning grooves (111), and an auxiliary positioning groove (113) is provided in lateral communication with the gap positioning groove (112), and partitions (114) are provided inside the gap positioning groove (112) and the end positioning groove (111), and the spacing between two adjacent partitions (114) is equal to the thickness of a single battery cell.

8. The automatic electrolyte replenishing device according to claim 7, characterized in that: Positioning piles (115) are provided at both ends of the partition (114) and cooperate with the end positioning grooves (111) and the gap positioning grooves (112) and the end points of the partition (114). An infrared positioner (118) is provided inside the positioning pile (115) and is arranged upward. A strip-shaped infrared receiving plate is provided at the bottom of the variable injection system (2).

9. The automatic electrolyte replenishing device according to claim 7, characterized in that: The lateral adjustment platform (102) is also provided with a lateral cylinder group (104), the lateral cylinder group (104) comprising a plurality of split cylinders (116), each of which is independently connected to an adjustment split block (117).

10. An automatic electrolyte replenishing device method, according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, quantitative weighing: take a battery cell component and place it on the weighing system (6). The system identifies how many battery cells it is (different battery cell model groups), calculates the weight of electrolyte required to be replenished through the industrial computer (5), and transmits the replenishment signal to the variable pump (7) through the industrial computer (5); S2, electrolyte treatment: the electrolyte treatment group (106) is opened to perform bubble removal treatment in advance, the electrolyte is pumped to the exhaust tank (108) through the liquid storage tank (109), and connected to the vacuum positive pressure system (4) to apply stirring action while vacuuming to exhaust the bubbles and then guide them back to the liquid storage tank (109) for standby use; S3, fixing the battery cell: the N-type battery cell of the determined model is fixed at the circumferential side by means of the bottom positioning group (103), and the variable injection system (2) is moved to connect the injection end with the injection port of the battery cell and seal it; S4, vacuum filling of the battery cell: start the vacuum positive pressure system (4), fill the required electrolyte quantitatively measured by the weighing system (6) into the filling cup (701), and the electrolyte in the filling cup (701) is filled into the battery cell through the set vacuum positive pressure cycle; S5, review: the battery cell after liquid injection is weighed again using a weighing system (6) to check whether the liquid injection weight is within the required range, and the liquid injection information is automatically uploaded to the MES system for record through the industrial computer (5); S6, dust removal: After the liquid replenishment is completed, the variable liquid injection system (2) is moved to the dust removal box for normalized dust removal to restore the dust-free state of the liquid injection end of the variable liquid injection system (2).

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