Automatic electrolyte supplementing device

Abstract

The utility model provides an automatic electrolyte supplementing device which comprises a liquid supplementing workbench, and the liquid supplementing workbench comprises a vacuum positive pressure system, an industrial personal computer, an electric control system and a variable liquid 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

Technical Field

[0001] This utility model relates to the field of electrolyte injection technology for prismatic lithium batteries, specifically an automatic electrolyte replenishment device. Background Technology

[0002] Currently, the electrolyte replenishment process for prismatic lithium batteries is typically performed manually using a traditional syringe. While convenient and quick, this method has several drawbacks: the syringe is used to collect the electrolyte from a beaker exposed to a dehumidified environment. Prolonged storage of the electrolyte can lead to moisture absorption and a significant risk of contamination by foreign matter, which can affect the actual performance of the battery. Furthermore, this replenishment method often results in two or more replenishment operations due to the varying capacities of the multiple batteries. It is impossible to determine the capacity of each replenishment after it has been performed, leading to the risk of repeated or skipped steps. This presents non-standardized technical challenges and poses certain safety hazards.

[0003] To achieve the above objectives, this utility model provides an automatic electrolyte replenishment device, which can solve the problems mentioned in the background art. Utility Model Content

[0004] This utility model adopts the following technical solution:

[0005] An automatic electrolyte replenishment device includes a replenishment worktable, which includes a horizontal positioning platform and a lateral adjustment platform. The top of the lateral adjustment platform is equipped with a vacuum positive pressure system, an industrial control computer, and an electrical control system. The lateral adjustment platform is equipped with a variable injection system on its side, and the horizontal positioning platform is equipped with a weighing system.

[0006] The horizontal positioning platform is equipped with an electrolyte treatment group, which is connected to the vacuum positive pressure system. The inlet end of the variable injection system is equipped with a variable pump. The replenishment workbench is connected to the vacuum positive pressure system. The variable injection system, the electrical control system, and the vacuum positive pressure system are all electrically connected to the industrial control computer.

[0007] The variable pump is equipped with an injection cup at its outlet. The injection cup circulates the electrolyte through the vacuum positive pressure set by the vacuum positive pressure system to replenish the variable injection system. The horizontal positioning platform is also equipped with a bottom positioning group. The variable injection system and the bottom positioning group work together to inject the electrolyte into the battery cell.

[0008] The lateral adjustment platform is equipped with a dust collection box, and the transverse positioning platform is equipped with a recycling trough.

[0009] Preferably, the electrolyte treatment unit includes a cage-type fixing frame fixed on the transverse positioning platform. The cage-type fixing frame is provided with an exhaust tank and a liquid storage tank distributed vertically inside. The exhaust tank is connected to the vacuum positive pressure system and is used to perform agitated vacuum extraction of the electrolyte.

[0010] Preferably, the variable injection system includes an injection tank, and the lateral adjustment platform is provided with a transverse lateral balance groove. The injection tank is slidably connected within the lateral balance groove. The variable pump is fixedly connected to the injection tank. The injection tank is provided with a lateral push cylinder that moves up and down laterally. The base of the lateral push cylinder is provided with a split-type weighing unit on both sides. The split-type weighing unit is provided with an injection hanging plate. The top of the injection hanging plate is provided with a top locking rail. Multiple injection pipes are connected inside the top locking rail. The injection pipes are sealed to the vacuum positive pressure system and the injection cup.

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

[0012] Preferably, the injection tank is provided with a longitudinal meshing groove, which meshes with the movable end of the lateral push cylinder to drive it in an up-and-down meshing manner, and the exit cylinder end of the lateral push cylinder pushes the injection hanging plate in contact.

[0013] Preferably, the split-type weighing unit 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 to 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 evenly spaced locking elements inside, the inlet end of the injection pipe is connected to a pipe groove post, and each pipe groove post is connected to a single locking element; the injection tank is provided with multiple conduit positioning frames, and both the conduit positioning frames and the pipe groove posts are used to fix the conduit.

[0015] The injection mounting plate is provided with a transverse sliding groove, and an adaptation plate is provided on one side of the injection pipe to slide in cooperation with the transverse sliding groove.

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

[0017] Preferably, the two ends of the partition are provided with positioning stakes that cooperate with the end positioning groove, the gap positioning groove, and the end points of the partition. The positioning stakes are provided with upward-facing infrared locators, and the bottom of the variable injection system is provided with a strip-shaped infrared receiving plate.

[0018] Preferably, the lateral adjustment platform is further provided with a lateral cylinder group, which includes multiple split cylinders, and each split cylinder is individually connected to an adjustment block.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] The principle of this invention is as follows: the electrolyte in the injection cup is vacuumed by a vacuum positive pressure system, and then positive pressure is applied to the injection cup and the inside of the battery cell to force the electrolyte into the battery cell. This avoids the problem of the electrolyte being invaded by foreign objects due to the problem of the syringe itself, which leads to the degradation of the battery cell performance.

[0021] By pretreating the electrolyte using a sealed electrolyte treatment unit and filling it with pressure vacuum, the entire electrolyte transportation process is protected in a closed manner while reducing the risk of exposure, thus ensuring the performance of the electrolyte.

[0022] Meanwhile, it provides full protection for the electrolyte and precisely controls the volume of liquid added in a single filling process. This enables a standardized process for filling the electrolyte in one go, avoiding secondary or multiple fillings. It standardizes the process, reduces the occurrence of overflows caused by skipping or repeating steps, and improves operational safety.

[0023] This device uses a dual-weight measurement and a proprietary fixed-mode method to fix the filling method of multiple battery cells, enabling accurate filling of N battery cells in one go, meeting the electrolyte filling requirements of different battery cells, and effectively improving the application range of this device. At the same time, it uses a split-type weighing system inside the variable electrolyte filling system to perform a secondary verification of the internal electrolyte storage in the pipeline, which can more accurately control the amount of electrolyte filled in a single batch, eliminate the error of the internal storage of the variable electrolyte filling system on the final electrolyte content inside the battery cell, and facilitate comparison with the secondary weighing system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model (without connected pipelines);

[0025] Figure 2 This is a schematic diagram of the structure of the present invention after the battery cell is fixed (without connected pipelines);

[0026] Figure 3 For the present utility model Figure 1Enlarged schematic diagram of the structure at point A in the diagram;

[0027] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point B in the diagram;

[0028] Figure 5 For the present utility model Figure 1 A magnified schematic diagram of the structure at point C.

[0029] In the diagram: 1. Liquid replenishment workbench; 2. Variable displacement liquid injection system; 3. Electrical control system; 4. Vacuum positive pressure system; 5. Industrial computer; 6. Weighing system; 7. Variable displacement pump;

[0030] 101. Lateral positioning platform; 102. Lateral adjustment platform;

[0031] 103. Bottom positioning assembly; 104. Side cylinder assembly; 105. Recycling tank;

[0032] 106. Electrolyte treatment unit; 107. Cage-type support frame; 108. Exhaust tank; 109. Storage tank;

[0033] 110. Electrostatic isolation area; 111. End positioning groove; 112. Gap positioning groove; 113. Auxiliary positioning groove; 114. Partition plate; 115. Positioning post; 116. Split cylinder; 117. Adjustment split block; 118. Infrared positioner; 119. Lateral balance groove;

[0034] 201. Injection tank; 202. Longitudinal meshing groove; 203. Lateral push cylinder; 204. Split-type weighing unit; 205. Lateral support plate; 206. Tensile test plate;

[0035] 208. Injection mounting plate; 209. Top locking rail; 210. Pipe trench pile; 211. Injection pipe; 212. Horizontal movement groove; 213. Adaptation plate; 214. Guide tube positioning frame;

[0036] 701. Liquid injection cup body. Detailed Implementation

[0037] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model 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 disclosure of the utility model more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] The present invention will be further described in detail below with reference to the accompanying drawings.

[0041] In one embodiment of this utility model:

[0042] Please refer to the attached document carefully. Figure 1-3 The system includes a liquid replenishment workbench 1, which includes a horizontal positioning platform 101 and a lateral adjustment platform 102. The top of the lateral adjustment platform 102 is equipped with a vacuum positive pressure system 4, an industrial control computer 5, and an electrical control system 3. The lateral adjustment platform 102 is equipped with a variable injection system 2 on its side. The horizontal positioning platform 101 is equipped with a weighing system 6.

[0043] The horizontal positioning platform 101 is equipped with an electrolyte treatment group 106, which is connected to the vacuum positive pressure system 4. The variable injection system 2 is equipped with a variable pump 7 at one end of its inlet. The replenishment workbench 1 is connected to the vacuum positive pressure system 4. The variable injection system 2, the electrical control system 3, and the vacuum positive pressure system 4 are all electrically connected to the industrial control computer 5.

[0044] The variable pump 7 has an injection cup 701 at its outlet. The injection cup 701 circulates the electrolyte through the vacuum positive pressure system 4, replenishing the variable injection system 2. The horizontal positioning platform 101 is also equipped with a bottom positioning group 103. The variable injection system 2 and the bottom positioning group 103 work together to inject electrolyte into the battery cell. The working principle of the variable injection pump is as follows: the industrial control software provides the injection pump control box with the injection volume value, and the control box automatically calculates the number of rotations of the injection pump and adjusts the swing angle accordingly. Injection volume = number of rotations x injection volume per rotation (the larger the swing angle of the injection pump, the larger the injection volume per rotation). The injection software of the industrial control computer 5 is connected to the terminal MES system to automatically calculate how much electrolyte needs to be injected into each battery cell.

[0045] The lateral adjustment platform 102 is equipped with a dust collection box, and the transverse positioning platform 101 is equipped with a recovery tank 105. The electrolyte treatment group 106 includes a cage-type fixing frame 107 fixed on the transverse positioning platform 101. The cage-type fixing frame 107 has an exhaust tank 108 and a storage tank 109 arranged vertically inside. The exhaust tank 108 is connected to the vacuum positive pressure system 4 and is used for stirring vacuum extraction of the electrolyte. The electrolyte needs to be de-aired in advance, which is done by the upper and lower tanks. The electrolyte is first drawn into the upper stirring tank, and the air bubbles are removed by vacuuming and stirring (to ensure accurate injection weight). After treatment, the electrolyte flows to the lower storage tank 109 for later use.

[0046] An automatic electrolyte replenishment device method includes the following steps: S1, quantitative weighing: Take a battery cell element and place it in the weighing system 6. The system identifies the number of battery cells (different battery cell models and groups), calculates the required electrolyte weight by the industrial control computer 5, and transmits the replenishment signal to the variable pump 7 by the industrial control computer 5; After the battery cell to be charged is scanned and weighed, the industrial control software of the industrial control computer 5 obtains the battery cell data information by connecting to the MES system, and calculates the required electrolyte weight based on the weighed weight;

[0047] S2, Electrolyte treatment: Turn on the electrolyte treatment group 106 to perform air bubble removal treatment in advance. The electrolyte is pumped to the exhaust tank 108 through the storage tank 109. The vacuum positive pressure system 4 is connected to remove air bubbles by applying a stirring action while drawing a vacuum, and then guided back to the storage tank 109 for later use.

[0048] S3. Fixing the battery cell: The N-type battery cell of the determined model is fixed in the peripheral position by the bottom positioning group 103, and the variable liquid injection system 2 is moved to connect and seal the liquid injection end with the liquid injection port of the battery cell.

[0049] S4, Cell vacuum electrolyte injection: Turn on the vacuum positive pressure system 4, and fill the required amount of electrolyte into the injection cup 701 by the weighing system 6. The electrolyte in the injection cup 701 is replenished into the cell through the set vacuum positive pressure circulation.

[0050] S5. Verification: The battery cells after liquid injection are weighed a second time using the weighing system 6 to verify whether the liquid replenishment weight is within the required range, and the liquid replenishment information is automatically uploaded to the MES system for recording via the industrial control computer 5.

[0051] S6. Dust Removal: After the replenishment is completed, move the variable liquid injection system 2 to the dust removal box for routine dust removal to restore the dust-free state of the injection end of the variable liquid injection system 2. The dust removal device and the recovery tank 105 can adopt common existing technologies, which are used to provide routine protection for the filling device.

[0052] The electrolyte flows through the following path: storage tank 109 - stirring tank - storage tank 109 - variable pump 7 - diaphragm valve (switch) - injection cup 701 - clamp valve injection nozzle - battery cell to be charged. The injection principle is to use the vacuum positive pressure system 4 to evacuate the battery cell by injecting the electrolyte in the injection cup 701, and then apply positive pressure to the injection cup 701 and the inside of the battery cell to force the electrolyte into the battery cell. This avoids the problem of electrolyte degradation caused by foreign matter entering the battery cell due to problems with the syringe itself. The electrolyte is pretreated and pressure vacuum filled by the sealed electrolyte treatment group 106. While reducing the risk of exposure, the entire electrolyte transportation process is sealed and protected to ensure the performance of the electrolyte.

[0053] In yet another embodiment of this utility model:

[0054] Please refer to this carefully. Figure 1 , Figure 2 , Figure 5 The variable injection system 2 includes an injection tank 201. The lateral adjustment platform 102 is provided with a transverse lateral balance groove 119. The injection tank 201 is slidably connected within the lateral balance groove 119. The variable pump 7 is fixedly connected to the injection tank 201. The injection tank 201 is provided with a lateral push cylinder 203 that moves up and down laterally. The base of the lateral push cylinder 203 is provided with two separate weighing units 204 on both sides. The separate weighing units 204 are provided with an injection hanging plate 208. The top of the injection hanging plate 208 is provided with a top locking rail 209. Multiple injection pipes 211 are connected inside the top locking rail 209. The injection pipes 211 are sealed to the vacuum positive pressure system 4 and the injection cup body 701.

[0055] The contact area between the front end of the injection tube 211 and the injection port of the battery cell is a sealed structure;

[0056] The usage method of variable injection system 2 is as follows: (Refer to...) Figure 5Electrolyte is supplied from the self-filling cup 701. The corresponding sealed pipe section is fixed using the conduit positioning bracket 214. The upper and lower engagement positions of the lateral push cylinder 203 are changed. The lateral push cylinder 203 and the longitudinal engagement groove 202 are automatically damped and locked. The injection mounting plate 208 is supported by the split-type weighing unit 204. The initial weight of the injection mounting plate 208 is recorded by the tensile testing plate 206 and transmitted to the industrial control computer 5 for recording. Based on the position of the battery cell's injection port, the same number of injection ports are used... The injection pipe 211 and the slot post 210 drive the lateral push cylinder 203 to extend the distance, so that the injection pipe 211 moves downward to correspond to the injection port, so that the injection pipe 211 and the cell injection port are sealed and connected. The injection tank 201 and the vacuum positive pressure system 4 connected to it are opened to fill the cell with electrolyte. The weight obtained by the split weighing unit 204 after filling is compared with the previous weight. If the weight is within the reasonable range of normal error, the injection is completed. Then, the weighing system 6 performs a second check.

[0057] The injection tank 201 is provided with a longitudinal meshing groove 202, which meshes with the movable end of the lateral push cylinder 203 to drive it up and down. The exit cylinder end of the lateral push cylinder 203 pushes the injection hanging plate 208 in contact.

[0058] The split-type weighing unit 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 and is in a downward self-weight pulling state with the tensile test plate 206. This can be directly referred to the principle of common tensile weight measuring instruments.

[0059] Please pay special attention to the following: Figure 2 , Figure 3 The top locking rail 209 has evenly spaced locking elements inside. The inlet end of the injection pipe 211 is connected to a pipe groove post 210, and each pipe groove post 210 is connected to a single locking element. The injection tank 201 is provided with multiple conduit positioning brackets 214, and both the conduit positioning brackets 214 and the pipe groove posts 210 are used to fix the conduit. The injection hanging plate 208 is provided with a transverse sliding groove 212, and one side of the injection pipe 211 is provided with an adaptation plate 213 that slides in cooperation with the transverse sliding groove 212. Figure 5 As shown, the three channels on the right are injection pipes 211 with fixed spacing and pipe trench piles 210, while the multiple channels on the left are injection pipes 211 and pipe trench piles 210 with uneven spacing. The third channel from the right is in a fixed position.

[0060] In yet another embodiment of this utility model:

[0061] Please refer to this carefully. Figure 3 , Figure 4 The bottom positioning group 103 includes an electrostatic isolation area 110, and an end positioning groove 111 is provided on each side of the electrostatic isolation area 110. A plurality of gap positioning grooves 112 are evenly spaced between the two end positioning grooves 111. An auxiliary positioning groove 113 is laterally connected to the gap positioning groove 112. A partition 114 is provided inside both the gap positioning groove 112 and the end positioning groove 111. The distance between two adjacent partitions 114 is equal to the thickness of a single cell.

[0062] The two ends of the partition 114 are provided with positioning posts 115 that cooperate with the end positioning groove 111, the gap positioning groove 112, and the end point of the partition 114. The positioning post 115 is provided with an upward-facing infrared locator 118 inside. The bottom of the variable injection system 2 is provided with a strip-shaped infrared receiving plate.

[0063] In addition, the lateral adjustment platform 102 is also provided with a lateral cylinder group 104, which includes multiple split cylinders 116. Each split cylinder 116 is individually connected to an adjustment split block 117, which can be extended independently.

[0064] Important reference Figure 3 , Figure 4 During the assembly of battery cells, Figure 4 In this state, the partition 114 inside the end positioning groove 111 on one side extends out to block the view, while the partition 114 on the other side is positioned according to the specifications of the battery cell, and the partition 114 at the corresponding position is raised. Figure 4 Two of the partitions 114 inside the three auxiliary positioning slots 113 shown are placed inside the auxiliary positioning slots 113 when assembling the battery cell. The other is at the edge distance of the battery cell. It is an adaptive extension and fixation, which limits the range and facilitates positioning adjustment in conjunction with the lateral split cylinder 116.

[0065] At this time, the infrared device inside the extended positioning post 115 shows the position of the battery cell edge distance, which makes it convenient for the industrial control computer 5 to drive the side cylinder group 104 to extend the split cylinder 116 within the corresponding range, drive the segmented adjustment split block 117 to hit the side of the battery cell, and at the same time make it convenient for the industrial control computer 5 to calculate the number of liquid injection ports of the battery cell, providing a complete automated process.

[0066] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0067] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. An automatic electrolyte replenishment device, characterized in that: Including the supplement liquid workstation (1), the supplement liquid workstation (1) includes transverse positioning platform (101), lateral adjustment platform (102), the top of lateral adjustment platform (102) is equipped with vacuum positive pressure system (4), industrial computer (5), electric control system (3), the lateral of lateral adjustment platform (102) is equipped with variable injection system (2), the top of transverse positioning platform (101) is equipped with weighing system (6); The electrolyte processing group (106) is connected between the vacuum positive pressure system (4), the liquid inlet end of the variable injection system (2) is equipped with a variable pump (7), the supplement liquid workstation (1) is connected with the vacuum positive pressure system (4), the variable injection system (2), the electric control system (3), the vacuum positive pressure system (4) are electrically connected with the industrial computer (5); The outlet end of the variable pump (7) is equipped with a liquid injection cup body (701), the electrolyte passing through the liquid injection cup body (701) is supplemented into the variable injection system (2) by the vacuum positive pressure circulation set by the vacuum positive pressure system (4), the transverse positioning platform (101) is further equipped with a bottom positioning group (103); The transverse positioning platform (101) is equipped with a recovery tank (105).

2. The automatic electrolyte makeup device of claim 1, wherein: The electrolyte processing group (106) includes a cage type fixing frame (107) fixed on the transverse positioning platform (101), the cage type fixing frame (107) is internally provided with an exhaust tank (108) and a liquid storage tank (109) distributed in an up-down manner, the exhaust tank (108) is connected with the vacuum positive pressure system (4), and the exhaust tank (108) is used for stirring vacuum extraction of the electrolyte.

3. The automatic electrolyte makeup device of claim 1, wherein: The variable injection system (2) includes a liquid injection tank (201), the lateral adjustment platform (102) is equipped with a lateral balance groove (119) in a transverse direction, and the liquid injection tank (201) is slidably connected in the lateral balance groove (119); The variable pump (7) is fixedly connected with the liquid injection tank (201), the liquid injection tank (201) is movably provided with a lateral push cylinder (203) in a lateral and up-down manner, the base of the lateral push cylinder (203) is provided with a split type weighing group (204), the liquid injection hanging plate (208) is provided on the split type weighing group (204), the top of the liquid injection hanging plate (208) is provided with a top locking rail (209), a plurality of liquid injection pipes (211) are connected in the top locking rail (209), and the liquid injection pipes (211) are in sealing connection with the vacuum positive pressure system (4) and the liquid injection cup body (701); The contact area between the front end of the liquid injection pipe (211) and the liquid injection port of the battery cell is a sealing structure.

4. The automatic electrolyte makeup device of claim 3, wherein: The liquid injection tank (201) is provided with a longitudinal engagement groove (202), which is engaged with the movable end of the lateral push cylinder (203) to drive up and down, the exit cylinder end of the lateral push cylinder (203) is in contact with the liquid injection hanging plate (208) to push, the split type 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 with a tensile test plate (206), the tensile test plate (206) is connected with an inner test plate below, and the inner test plate is fixed to the inner wall of the liquid injection hanging plate (208).

5. The automatic electrolyte makeup device of claim 3, wherein: The top locking rail (209) has uniformly spaced locking pieces inside, the liquid injection pipe (211) is connected with a pipe slot pile (210), and a single pipe slot pile (210) is connected with a single locking piece; the liquid injection tank (201) is provided with a plurality of catheter positioning racks (214), and the catheter positioning rack (214) and the pipe slot pile (210) are used for fixing catheters; The liquid injection hanging plate (208) is provided with a horizontal transverse slot (212), and one side of the liquid injection pipe (211) is provided with an adaptive plate (213) which cooperates with the horizontal transverse slot (212) to slide.

6. The automatic electrolyte makeup device of claim 1, wherein: The bottom positioning group (103) includes an electrostatic isolation area (110), and an end positioning groove (111) is arranged at one end of the electrostatic isolation area (110) on both sides, a plurality of gap positioning grooves (112) are uniformly arranged between the two end positioning grooves (111), an auxiliary positioning groove (113) is arranged in lateral communication with the gap positioning groove (112), and a partition plate (114) is arranged inside the gap positioning groove (112) and the end positioning groove (111). The distance between two adjacent partition plates (114) is equal to the thickness of a single battery cell.

7. The automatic electrolyte makeup device of claim 6, wherein: The two ends of the partition plate (114) are provided with positioning piles (115) which cooperate with the end positioning groove (111) and the gap positioning groove (112), and the end point of the partition plate (114) is matched with each other, the positioning pile (115) is provided with an infrared positioner (118) arranged upward, and the bottom of the variable liquid injection system (2) is provided with a belt-shaped infrared receiving plate.

8. The automatic electrolyte makeup device of claim 6, wherein: The lateral adjustment platform (102) is further provided with a lateral cylinder group (104), the lateral cylinder group (104) includes a plurality of split cylinders (116), and each split cylinder (116) is separately connected with an adjustment split block (117).

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