Vacuum liquid injection device for soft package battery

Abstract

This utility model discloses a vacuum liquid injection device for pouch batteries, comprising a first frame, a second frame, a vacuum pumping mechanism, a clamping mechanism, a flaring mechanism, and an injection mechanism. The second frame is located below the first frame. The first frame has a first chamber with its opening facing downwards, and the second frame has a second chamber with its opening facing upwards. The first frame and the second frame can close to form a sealed chamber. The vacuum pumping mechanism communicates with the sealed chamber. The clamping mechanism includes a clamping component and a first driving component. The clamping component is installed inside the second chamber, and the first driving component is installed outside the second frame and is drively connected to the clamping component. The flaring mechanism includes a flaring component and a second driving component. The flaring component is installed inside the first chamber, and the second driving component is installed outside the first frame and is drively connected to the flaring component. The injection needle of the injection mechanism extends through the top wall of the first chamber into the first chamber. This utility model enables liquid injection of pouch batteries under vacuum, improving the wetting effect of the pouch batteries.

Description

Technical Field

[0001] This utility model relates to the field of battery production equipment technology, and in particular to a vacuum liquid injection device for soft-pack batteries. Background Technology

[0002] The production process of pouch batteries requires electrolyte injection, which is the process of injecting electrolyte into the encapsulated cells of the pouch battery to provide a carrier for the transport of ions in the battery.

[0003] Soft-pack batteries are typically filled with electrolyte using atmospheric pressure filling equipment. After filling, multiple rounds of vacuuming are performed to allow the electrolyte to penetrate and wet the battery. Once filling is complete, the electrolyte relies entirely on gravity for wettability during resting, thus requiring a resting period of 24-72 hours at room temperature. This results in longer production efficiency and battery turnover cycles. When using atmospheric pressure filling equipment, the electrolyte can accumulate in the air bladder, which can easily cause leakage during pre-sealing, contaminating the equipment. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a vacuum liquid injection device for soft-pack batteries, which can realize the liquid injection of soft-pack batteries under vacuum and improve the electrolyte wetting effect of soft-pack batteries.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vacuum liquid injection device for a pouch battery is provided, comprising:

[0007] A first frame and a second frame located below the first frame, the first frame having a first chamber with an opening facing downwards, the second frame having a second chamber with an opening facing upwards, the first frame being able to close with the second frame to form a sealed chamber;

[0008] A vacuuming mechanism is installed on the first frame or the second frame and communicates with the sealed chamber;

[0009] A clamping mechanism, comprising a clamping component and a first driving component, wherein the clamping component is installed in the second cavity, and the first driving component is installed outside the second frame and passes through the side wall of the second frame to be connected to the clamping component in a transmission manner, wherein the driving component is capable of driving the clamping component to selectively clamp the soft pack battery;

[0010] A flaring mechanism, comprising a flaring component and a second driving component, wherein the flaring component is installed in the first cavity, and the second driving component is installed outside the first frame and passes through the side wall of the first frame to be connected to the flaring component in a transmission manner, and the second driving component can drive the flaring component to flare the soft-pack battery.

[0011] The liquid injection mechanism includes a liquid injection assembly and a third drive assembly installed on the upper end of the first frame. The liquid injection needle of the liquid injection assembly extends through the top wall of the first chamber into the first chamber and is sealed to the top wall of the first chamber. The third drive assembly can drive the liquid injection assembly to inject liquid into the flared soft-pack battery.

[0012] As a further embodiment of the vacuum liquid injection device for soft-pack batteries, the width of the second chamber extends along a first direction, and the length of the second chamber extends along a second direction. The first direction, the second direction, and the vertical direction are perpendicular to each other. The clamping assembly consists of two sets, which are spaced apart along the first direction within the second chamber. Each set of clamping assemblies includes multiple clamping portions spaced apart along the second direction. Each clamping portion includes an elastic guide and a first clamping plate and a second clamping plate arranged along the first direction. The second clamping plate is fixed within the second chamber, and the first clamping plate is connected to the second clamping plate through the elastic guide. The elastic guide ensures that the first clamping plate always tends to move toward the second clamping plate. The second frame is provided with a set of the first driving assemblies on both outer sides along the first direction. The first driving assemblies are capable of being driven to the corresponding first clamping plate to drive the first clamping plate to move away from the second clamping plate.

[0013] As a further embodiment of the vacuum liquid injection device for soft-pack batteries, each clamping part includes two elastic guide members spaced apart along the second direction. Each elastic guide member includes a guide rod, a sliding sleeve, a spring seat, and a spring. The length of the guide rod extends along the first direction. One end of the guide rod is fixed to the cavity wall of the second chamber. The sliding sleeve is slidably sleeved on the guide rod and fixedly connected to the first clamping plate. The spring seat is sleeved on the guide rod and adjacent to the other end of the guide rod. The spring is located inside the spring seat and sleeved on the guide rod. The first clamping plate is located between the spring seat and the sliding sleeve. The spring abuts against the side of the first clamping plate opposite to the second clamping plate.

[0014] As a further embodiment of the vacuum liquid injection device for soft-pack batteries, the clamping part further includes an abutment seat, an abutment post, and a guide seat. The abutment seat protrudes from the side of the first clamping plate facing the second clamping plate. The guide seat passes through the cavity wall of the second chamber and is fixed to the cavity wall. The guide seat has a guide hole through it along the first direction. One end of the abutment post is slidably disposed in the guide hole, and the other end abuts against the abutment seat.

[0015] The first driving assembly includes a base plate, a first driving member, a transmission plate, and a push rod. The first driving member is mounted on the base plate and is connected to the transmission plate to drive the transmission plate to move along the first direction. The number of push rods corresponds one-to-one with the number of clamping parts in each set of clamping assemblies, and the push rod is directly opposite the guide hole of the corresponding guide seat. The push rod is fixedly connected to the transmission plate, and the transmission plate can drive the push rod to extend into the guide hole and abut against the abutting post.

[0016] As a further embodiment of the vacuum liquid injection device for pouch batteries, the flaring assembly and the second driving assembly are in multiple sets. Each flaring assembly corresponds one-to-one with the clamping part of each set of clamping assemblies. Each set of flaring assemblies includes two flaring structures spaced apart along a first direction within the first chamber. Each of the two flaring structures corresponds one-to-one with the pouch batteries clamped by the two clamping parts spaced apart along the first direction within the second chamber. Each set of second driving assemblies includes two second driving members that correspond one-to-one with the flaring structures. The second driving members are mounted on the upper end of the first frame and pass through the top wall of the first frame to be connected to the flaring structure. The second driving members can drive the corresponding flaring structure to flare the pouch batteries clamped by the clamping parts.

[0017] As a further embodiment of the vacuum liquid injection device for pouch batteries, the flared structure includes a fixed plate, a first sliding part, a transmission part, and two sets of adsorption members. The fixed plate is fixed in the first chamber. Two first sliding parts are installed on the same side of the fixed plate along the second direction, and the two first sliding parts can slide relative to the fixed plate along the first direction. Each set of adsorption members is connected to one first sliding part. Each pouch battery located in the sealed chamber is located between the two sets of adsorption members. The second driving member is connected to the two first sliding parts through the transmission part. The second driving member can drive the transmission part to move in the vertical direction. The transmission part can drive the two first sliding parts to move the adsorption members closer to or further away from each other along the first direction.

[0018] As a further embodiment of the vacuum liquid injection device for soft-pack batteries, the flaring mechanism further includes multiple sets of liquid receiving structures corresponding one-to-one with the flaring assembly. The liquid receiving structure includes a third driving member, a first connecting member, two connecting rods, two second sliding parts, and two liquid receiving trays for collecting electrolyte leaked from the liquid injection mechanism. A second sliding part is provided on the side of the fixed plate opposite to the first sliding part. The second sliding part can slide relative to the fixed plate along the first direction. Each liquid receiving tray is connected to a second sliding part. Each second sliding part is connected to the first connecting member through a connecting rod. The third driving member is installed at the upper end of the first frame and passes through the top wall of the first frame to be connected to the first connecting member in the first chamber. The third driving member can drive the first connecting member to move in the vertical direction. The first connecting member can drive the two second sliding parts to move the liquid receiving trays closer to or further away from each other along the first direction.

[0019] As a further embodiment of the vacuum liquid injection device for soft-pack batteries, the liquid injection assembly is in multiple sets, and the number of liquid injection assemblies corresponds one-to-one with the number of clamping parts of the clamping assembly; each set of liquid injection assemblies includes a fourth driving member installed on the upper end of the first frame, a mounting plate, and two sets of liquid injection structures, the fourth driving member being drivenly connected to the mounting plate, and the two sets of liquid injection structures being spaced apart along the first direction;

[0020] Each injection structure includes an injection needle and an injection cup, a first valve, a second valve, and an injection plug located at the upper end of the first frame. The injection cup is mounted on the mounting plate and has a cavity with an open lower end. The lower end of the injection plug is inserted into the cavity from the top of the injection cup and seals against the cavity wall. The mounting plate has a flow channel communicating with the lower end of the cavity. The first valve is mounted on the outer periphery of the mounting plate and communicates with the flow channel for injecting electrolyte into the injection cup. The second valve is mounted on the lower end of the mounting plate and its inlet communicates with the flow channel. The injection needle communicates with the injection port of the second valve and extends into the first cavity.

[0021] The fourth driving component can drive the mounting plate to move vertically, so as to drive the injection needle to be inserted into the flared soft-pack battery. The injection plug can push the electrolyte in the injection cup into the injection needle and inject it into the soft-pack battery.

[0022] As a further embodiment of the vacuum liquid injection device for soft-pack batteries, the liquid injection assembly further includes a fifth driving member, a second connecting member, and two pressure rods. The fifth driving member is mounted on the mounting plate and is connected to the second connecting member in a transmission manner. The two pressure rods protrude from the lower end of the second connecting member and correspond one-to-one with the liquid injection plugs. The fifth driving member can drive the second connecting member to move the pressure rods in the vertical direction so that the pressure rods abut against the liquid injection plugs and drive the liquid injection plugs to move downward.

[0023] As a further embodiment of the vacuum liquid injection device for pouch batteries, a sixth driving component is also included. The sixth driving component is mounted on the frame and is connected to the first frame in a transmission manner. The sixth driving component is capable of driving the first frame to move in a vertical direction.

[0024] Beneficial effects: By designing the first and second frames and rationally arranging the installation positions of the vacuuming mechanism, clamping mechanism, flaring mechanism and liquid injection mechanism, this utility model can realize the liquid injection of the flared soft-pack battery under vacuum. The vacuum can extract the gas present in the pores of the electrodes and separator inside the soft-pack battery, allowing the electrolyte to seep into the pores through capillary action, reducing the unwetted area and thus improving the electrolyte wetting efficiency. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the structure of the vacuum liquid injection device for soft-pack batteries described in an embodiment of the present invention;

[0027] Figure 2 This is a side view of the vacuum liquid injection device for soft-pack batteries described in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the first frame in an embodiment of the present utility model;

[0029] Figure 4 This is a top view of the two sets of clamping components assembled with the second frame according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the first driving component in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the flaring mechanism described in an embodiment of the present utility model. Figure 1 ;

[0032] Figure 7 This is a schematic diagram of the flaring mechanism described in an embodiment of the present utility model. Figure 2 ;

[0033] Figure 8 This is a schematic diagram of the liquid injection mechanism described in an embodiment of the present invention.

[0034] In the picture:

[0035] 1. Soft-pack battery;

[0036] 100. First frame; 101. First chamber;

[0037] 200. Second frame; 201. Second chamber;

[0038] 300. Clamping mechanism; 310. Clamping part; 311. First clamping plate; 312. Second clamping plate; 313. Guide rod; 314. Sliding sleeve; 315. Spring seat; 316. Fixed seat; 317. Abutment seat; 318. Abutment post; 319. Guide seat; 320. Base plate; 330. First driving member; 340. Transmission plate; 350. Push rod; 360. First guide structure;

[0039] 400. Flaring mechanism; 410. Flaring structure; 411. Fixing plate; 412. First sliding part; 4121. Second guide structure; 4122. First intermediate connector; 413. Transmission part; 4131. Transmission guide plate; 41311. Transmission guide hole; 4132. Roller; 414. Adsorption element; 420. Second driving element; 430. Liquid receiving structure; 431. Third driving element; 432. First connector; 433. Connecting rod; 434. Second sliding part; 4341. Third guide structure; 4342. Second intermediate connector; 435. Liquid receiving tray;

[0040] 500. Injection mechanism; 510. Fourth drive component; 520. Mounting plate; 521. Flow channel; 530. Injection structure; 531. Injection needle; 532. Injection cup; 533. First valve; 534. Second valve; 535. Injection plug; 540. Fourth guide structure; 541. Guide rod; 542. Sleeve; 550. Sealing ring; 560. Fifth drive component; 570. Second connecting component; 580. Pressure rod;

[0041] 600, Sixth drive component; 700, Fifth guide structure; 800, Frame. Detailed Implementation

[0042] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction 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.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are merely used for distinction in description and have no special meaning.

[0046] like Figures 1 to 3 As shown, the vacuum liquid injection device for soft-pack batteries in this embodiment includes a first frame 100, a second frame 200, a vacuuming mechanism (not shown in the figure), a clamping mechanism 300, a flaring mechanism 400, and a liquid injection mechanism 500.

[0047] The second frame 200 is located below the first frame 100. The first frame 100 has a first chamber 101 with its opening facing downwards, and the second frame 200 has a second chamber 201 with its opening facing upwards. The first frame 100 can close with the second frame 200 to form a sealed chamber. A vacuuming mechanism is installed on the first frame 100 or the second frame 200 and communicates with the sealed chamber. The clamping mechanism 300 includes a clamping assembly and a first driving assembly. The clamping assembly is installed inside the second chamber 201, and the first driving assembly is installed outside the second frame 200 and passes through the side wall of the second frame 200 to be driveably connected to the clamping assembly. The first driving assembly can drive the clamping assembly to selectively clamp. The soft-pack battery 1; the flaring mechanism 400 includes a flaring assembly and a second driving assembly. The flaring assembly is installed inside the first chamber 101, and the second driving assembly is installed outside the first frame 100 and passes through the side wall of the first frame 100 to be connected to the flaring assembly. The second driving assembly can drive the flaring assembly to flare the soft-pack battery 1; the liquid injection mechanism 500 includes a liquid injection assembly and a third driving assembly installed on the upper end of the first frame 100. The liquid injection needle of the liquid injection assembly extends through the top wall of the first chamber 101 into the first chamber 101. The liquid injection needle is sealed to the top wall of the first chamber 101. The third driving assembly can drive the liquid injection assembly to inject liquid into the flared soft-pack battery 1.

[0048] It is understood that the clamping assembly is located within the second chamber 201. After the clamping assembly clamps and fixes the pouch battery 1, the first frame 100 and the second frame 200 close, forming a sealed chamber. After the sealed chamber is evacuated by the vacuuming mechanism, the flaring assembly in the sealed chamber is driven by the second driving assembly to flare the pouch battery 1. Then, the liquid injection assembly in the sealed chamber is driven by the third driving assembly to inject liquid into the flared pouch battery 1. In this embodiment, by designing the first frame 100 and the second frame 200 and rationally arranging the installation positions of the vacuuming mechanism, the clamping mechanism 300, the flaring mechanism 400, and the liquid injection mechanism 500, liquid injection into the flared pouch battery 1 can be achieved under vacuum. The vacuum can extract the gas present in the pores of the electrodes and separator inside the pouch battery 1, allowing the electrolyte to seep into the pores through capillary action, reducing the unwetted area and thus improving the electrolyte wetting efficiency.

[0049] In this embodiment, all structures extending through the cavity wall into the sealed cavity, such as the injection needle 531, are sealed to the corresponding frame to keep the sealed cavity in a relatively sealed state.

[0050] The vacuuming mechanism in this embodiment can also break the vacuum in the sealed chamber after vacuuming. After the soft-pack battery 1 is filled with electrolyte, the vacuuming mechanism can repeatedly perform vacuuming and breaking the vacuum cycle in the sealed chamber. During the breaking of the vacuum, the clamping component can be appropriately loosened to allow the battery cell to expand and absorb more electrolyte, thereby further improving the electrolyte wetting effect.

[0051] For example, the first frame 100 or the second frame 200 is provided with a vacuum port, and the vacuum mechanism is connected to the vacuum port through a connecting pipe.

[0052] Furthermore, such as Figure 1 and Figure 4 As shown, the width of the second chamber 201 extends along the first direction (X direction in the figure), and the length of the second chamber 201 extends along the second direction (Y direction in the figure). The first direction, the second direction, and the vertical direction (Z direction in the figure) are perpendicular to each other. There are two sets of clamping components, which are spaced apart in the second chamber 201 along the first direction. Each set of clamping components includes multiple clamping parts 310 spaced apart along the second direction. Each clamping part 310 includes an elastic guide and a first clamping plate 311 and a second clamping plate 312 arranged along the first direction. The second clamping plate 312 is fixed in the second chamber 201. The first clamping plate 311 is connected to the second clamping plate 312 through the elastic guide. The elastic guide makes the first clamping plate 311 always have a tendency to move toward the second clamping plate 312. The second frame 200 is provided with a set of first driving components on both outer sides along the first direction. The first driving components can be connected to the corresponding first clamping plate 311 to drive the first clamping plate 311 to move away from the second clamping plate 312.

[0053] For example, each set of clamping components in this embodiment includes three clamping parts 310 spaced apart along the second direction. That is, the clamping parts 310 of the two sets of clamping components are arranged in a 2*3 array, which can complete the vacuum liquid injection of six pouch batteries 1 at one time, with high liquid injection efficiency and high electrolyte wetting efficiency. In other embodiments, the number of clamping parts 310 in each set of clamping components can also be two, four or even more, depending on the actual needs of the design.

[0054] In this embodiment, before liquid injection, the first clamping plate 311 is driven by the first driving component to move away from the second clamping plate 312, so that the first clamping plate 311 and the second clamping plate 312 open until there is space between them for placing the soft-pack battery 1. Then, the soft-pack battery 1 is placed between the first clamping plate 311 and the second clamping plate 312 in the open state by an external robotic arm. The first driving component is withdrawn, and the first clamping plate 311 is reset under the action of the elastic guide, thereby fixing the soft-pack battery 1 between the first clamping plate 311 and the second clamping plate 312. The first frame 100 and the second frame 200 are closed to form a sealed chamber. After the soft-pack battery 1 is expanded and liquid injection is completed, the first frame 100 is separated from the second tube, and the first driving component drives the first clamping plate 311 to move away from the second clamping plate 312, so that the first clamping plate 311 and the second clamping plate 312 are in the open state. At this time, the soft-pack battery 1 after liquid injection is removed by an external robotic arm. In this embodiment, the opening (spreading) and clamping operations of the first clamping plate 311 and the second clamping plate 312 can be quickly realized through the cooperation of the first driving component and the elastic guide.

[0055] Furthermore, each clamping part 310 includes two elastic guide members spaced apart along a second direction. The elastic guide members include a guide rod 313, a sliding sleeve 314, a spring seat 315, and a spring (not shown in the figure). The length of the guide rod 313 extends along a first direction. One end of the guide rod 313 is fixed to the cavity wall of the second chamber 201. The sliding sleeve 314 is slidably sleeved on the guide rod 313 and fixedly connected to the first clamping plate 311. The spring seat 315 is sleeved on the guide rod 313 and adjacent to the other end of the guide rod 313. The spring is located inside the spring seat 315 and sleeved on the guide rod 313. The first clamping plate 311 is located between the spring seat 315 and the sliding sleeve 314. The spring abuts against the side of the first clamping plate 311 opposite to the second clamping plate 312.

[0056] This embodiment improves the clamping stability of the soft-pack battery 1 by providing two elastic guide members. Specifically, a sliding sleeve 314 is sleeved on the guide rod 313 and passes through the first clamping plate 311, and the sliding sleeve 314 is fixedly connected to the first clamping plate 311. The first driving assembly can drive the first clamping plate 311 to overcome the force of the two springs, so that the first clamping plate 311 moves along the guide rod 313 away from the second clamping plate 312 under the action of the guide rod 313. When the first driving assembly is disengaged, the two springs drive the first clamping plate 311 to move towards the second clamping plate 312, thereby clamping and fixing the soft-pack battery 1.

[0057] The elastic guide also includes a fixed base 316, which is fixedly connected to the side wall and bottom wall of the second chamber 201 by screws. The guide rod 313 is fixedly connected to the fixed base 316 by screws. The guide rod 313 is spaced apart from the second clamping plate 312 in the vertical direction.

[0058] Furthermore, such as Figure 4 and Figure 5 As shown, the clamping part 310 also includes an abutment seat 317, an abutment post 318, and a guide seat 319. The abutment seat 317 protrudes from the side of the first clamping plate 311 facing the second clamping plate 312. The guide seat 319 passes through the cavity wall of the second chamber 201 and is fixed on the cavity wall. The guide seat 319 is provided with a guide hole through the first direction. One end of the abutment post 318 is slidably disposed in the guide hole, and the other end abuts against the abutment seat 317.

[0059] The first driving assembly includes a base plate 320, a first driving member 330, a transmission plate 340, and a push rod 350. The first driving member 330 is mounted on the base plate 320 and is connected to the transmission plate 340 to drive the transmission plate 340 to move along a first direction. The number of push rods 350 corresponds one-to-one with the number of clamping parts 310 in each clamping assembly, and the push rod 350 is directly opposite the guide hole of the corresponding guide seat 319. The push rod 350 is fixedly connected to the transmission plate 340, and the transmission plate 340 can drive the push rod 350 to extend into the guide hole and abut against the abutment post 318.

[0060] In this embodiment, an abutment seat 317 is provided on the side of the first clamping plate 311 facing the second clamping plate 312. The first driving member 330 drives the push rod 350 to extend into the guide hole and push the abutment post 318 towards the first clamping plate 311 until it abuts against the abutment seat 317. The abutment seat 317 can shorten the travel of the push rod 350, thereby enabling the first clamping plate 311 and the second clamping plate 312 to open quickly. Since multiple push rods 350 are connected to the transmission plate 340, the first driving member 330 can drive the transmission plate 340 to move each push rod 350 synchronously, thereby driving all the clamping parts 310 of the clamping assembly to open or close synchronously.

[0061] Furthermore, the first drive assembly also includes a plurality of first guide structures 360 spaced apart along the second direction. The first guide structures 360 are used to guide the movement of the transmission unit 413 along the first direction. The first guide structure 360 ​​includes a first guide rail and a first slider. The length of the first guide rail extends along the first direction. The first guide rail is fixed on the base plate 320. The first slider is fixed on the bottom of the transmission plate 340. The first guide rail and the first slider are slidably connected.

[0062] For example, each clamping assembly in this embodiment includes three clamping parts 310, and the number of push rods 350 of the corresponding first driving assembly is three, and the number of first driving members 330 is two. The two first driving members 330 are spaced apart along the second direction. The synchronous driving transmission plate 340 drives the push rods 350 to move back and forth along the first direction. When the push rod 350 extends into the guide hole and abuts against the abutting post 318 and pushes the abutting post 318 toward the abutting seat 317 on the first clamping plate 311, until it abuts against the first clamping plate 311 and drives the first clamping plate 311 to move away from the second clamping plate 312, thereby realizing the opening operation of the clamping part 310. At this time, each soft-pack battery 1 can be placed between the corresponding first clamping plate 311 and second clamping plate 312 by an external robot. After the battery is placed, the first driving member 330 drives the transmission plate 340 to drive the push rod 350 out of the guide hole. At this time, the first clamping plate 311 cooperates with the second clamping plate 312 under the action of the spring to clamp the soft-pack battery 1.

[0063] Furthermore, such as Figure 3 and Figure 6 As shown, there are multiple sets of flaring assemblies and second driving assemblies. Each flaring assembly corresponds to a clamping part 310 of each clamping assembly. Each flaring assembly includes two flaring structures 410 spaced apart in the first chamber 101 along the first direction. The two flaring structures 410 correspond to the soft-pack batteries 1 clamped by the two clamping parts 310 spaced apart in the first direction in the second chamber 201. Each second driving assembly includes two second driving members 420 corresponding to the flaring structures 410. The second driving members 420 are installed on the upper end of the first frame 100 and pass through the top wall of the first frame 100 to be connected to the flaring structures 410. The second driving members 420 can drive the corresponding flaring structures 410 to flare the soft-pack batteries 1 clamped by the clamping parts 310.

[0064] In this embodiment, the number of flaring structures 410 corresponds one-to-one with the number of clamping parts 310. That is, the flaring structures 410 can simultaneously flare all the soft-pack batteries 1 clamped by the clamping parts 310, thereby enabling rapid subsequent liquid injection processing. For example, there are three groups of flaring components, that is, six flaring structures 410 arranged in a 2*3 array. There are also three groups of second driving components, each group of which includes two second driving members 420. Each second driving member 420 drives one flaring structure 410 to flare the corresponding soft-pack battery 1. All the second driving members 420 can be connected to a controller, and the controller can control all the second driving members 420 to drive each flaring structure 410 to flare the corresponding soft-pack battery 1.

[0065] Furthermore, the flared structure 410 includes a fixing plate 411, a first sliding part 412, a transmission part 413, and two sets of adsorption members 414. The fixing plate 411 is fixed inside the first chamber 101. Two first sliding parts 412 are installed on the same side of the fixing plate 411 along the second direction, and the two first sliding parts 412 can slide relative to the fixing plate 411 along the first direction. Each set of adsorption members 414 is connected to one first sliding part 412. Each soft-pack battery 1 located in the sealed chamber is located between the two sets of adsorption members 414. The second driving member 420 is connected to the two first sliding parts 412 through the transmission part 413. The second driving member 420 can drive the transmission part 413 to move in the vertical direction. The transmission part 413 can drive the two first sliding parts 412 to move the adsorption members 414 closer to each other or further away from each other along the first direction.

[0066] The upper end of the fixing plate 411 is fixedly connected to the top wall of the first chamber 101. The length of the fixing plate 411 extends along the first direction. The first sliding part 412 is slidably disposed on one side of the fixing plate 411 along the thickness (second direction) along the first direction. When the second driving member 420 drives the corresponding transmission part 413 to move in the vertical direction, the transmission part 413 synchronously drives the two first sliding parts 412 connected to it to move closer or further apart along the first direction. Since the soft-pack battery 1 is located between the two sets of adsorption members 414, when the two first sliding parts 412 move closer to each other, the two sets of adsorption members 414 can adsorb the aluminum-plastic film on both sides of the soft-pack battery 1 along the first direction. Then, the first driving member 330 drives the two first sliding parts 412 to move further apart, and the two sets of adsorption members 414 adsorb the aluminum-plastic film on both sides to expand outward, thereby realizing the flaring treatment of the soft-pack battery 1.

[0067] For example, the first sliding part 412 includes a second guide structure 4121 and a first intermediate connector 4122. The second guide structure 4121 includes a slidingly fitted second guide rail and a second slider. The length of the second guide rail extends along a first direction, and the second slider is fixedly connected to the first intermediate connector 4122. The transmission part 413 includes a transmission guide plate 4131 and two rollers 4132. The transmission guide plate 4131 has two transmission guide holes 41311 with an inverted V-shaped structure. The transmission guide holes 41311 penetrate the transmission guide plate along a second direction. The transmission guide plate 4131 has a roller 4132 connected to one of the first intermediate connectors 4122 via a connecting post. The axis of the connecting post extends along a second direction, and the roller 4132 can rotate around the axis of the connecting post. Each roller 4132 is engaged with one of the transmission guide holes 41311. When the second driving member 420 drives the transmission guide plate 4131 to move vertically, the roller 4132 rolls within the transmission guide hole 41311 along the length direction (incline direction) of the transmission guide hole 41311 while moving along the first direction. Specifically, when the second driving member 420 drives the transmission guide plate 4131 to move vertically upward, the roller 4132 rolls downward relative to the transmission guide hole 41311. The two rollers 4132 and the corresponding first intermediate connectors 4122 and adsorption members 414 move towards each other, and vice versa.

[0068] Specifically, each set of adsorption elements 414 includes two suction cups, and the two sets of adsorption elements 414 are arranged facing each other along the first direction.

[0069] Furthermore, such as Figure 7 As shown, the flaring mechanism 400 also includes multiple sets of liquid receiving structures 430 corresponding to the flaring components. Each liquid receiving structure 430 includes a third driving member 431, a first connecting member 432, two connecting rods 433, two second sliding portions 434, and two liquid receiving trays 435 for collecting electrolyte leaked from the injection mechanism 500. A second sliding portion 434 is provided on the side of the fixing plate 411 opposite to the first sliding portion 412. The second sliding portion 434 can slide relative to the fixing plate 411 in a first direction. Each liquid receiving tray 435... Each second sliding part 434 is connected to a first connecting member 432 via a connecting rod 433. A third driving member 431 is installed at the upper end of the first frame 100 and passes through the top wall of the first frame 100 to be connected to the first connecting member 432 in the first chamber 101. The third driving member 431 can drive the first connecting member 432 to move in the vertical direction. The first connecting member 432 can drive the two second sliding parts 434 to move the liquid receiving tray 435 closer to or further away from each other in the first direction.

[0070] After the injection mechanism 500 completes the injection process, some electrolyte remains inside the injection needle. When the injection needle is withdrawn from the soft-pack battery 1, the residual electrolyte inside and outside the injection needle falls into the sealed chamber, contaminating the sealed chamber and increasing the frequency and difficulty of cleaning. Therefore, this embodiment adds a liquid-receiving structure 430 to the flared structure 410. Under the driving action of the third driving member 431, a first connecting member 432 drives two connecting rods 433, which in turn move the corresponding second sliding part 434 and liquid-receiving plate 435 along the first direction to below the injection needle, thereby catching the electrolyte flowing out of the injection needle and preventing contamination of the sealed chamber.

[0071] The second sliding part 434 includes a third guide structure 4341 and a second intermediate connector 4342. The third guide structure 4341 includes a slidingly fitted third guide rail and a third slider. The length of the third guide rail extends along a first direction. The third slider is fixedly connected to the second intermediate connector 4342. The second intermediate connector 4342 is fixedly connected to a liquid receiving tray 435, with the opening of the liquid receiving tray 435 facing upward. One end of the connecting rod 433 along its length is rotatably connected to the first connector 432 via a pivot shaft, and the other end is rotatably connected to the second intermediate connector 4342 via another pivot shaft. When the third driving member 431 drives the first connecting member 432 to move upward, the first connecting member 432 drives the two connecting rods 433 to pull the second intermediate connecting member 4342 closer to each other under the action of the third guide structure 4341, and vice versa. Therefore, the third driving member 431 can control the liquid receiving plate 435 to move completely away from the injection needle before or during the injection, and to move directly below the injection needle after the injection is completed.

[0072] Furthermore, such as Figure 1 and Figure 8As shown, there are multiple sets of injection components, and the number of injection components corresponds one-to-one with the number of clamping parts 310 of the clamping components. Each set of injection components includes a fourth driving member 510 mounted on the upper end of the first frame 100, a mounting plate 520, and two sets of injection structures 530. The fourth driving member 510 is connected to the mounting plate 520 in a transmission manner. The two sets of injection structures 530 are spaced apart along a first direction. Each set of injection structures 530 includes an injection needle 531 and an injection cup 532, a first valve 533, a second valve 534, and an injection plug 535 located on the upper end of the first frame 100. The injection cup 532 is mounted on the mounting plate 520 and has a cavity with an open lower end. The lower end of the injection plug 535 is inserted into the cavity from the top of the injection cup 532. The mounting plate 520 is sealed to the cavity wall; the mounting plate 520 has a flow channel 521 that communicates with the lower end of the cavity; the first valve 533 is installed on the outer periphery of the mounting plate 520 and communicates with the flow channel 521, and is used to inject electrolyte into the injection cup 532; the second valve 534 is installed at the lower end of the mounting plate 520 and the inlet of the second valve 534 communicates with the flow channel 521; the injection needle 531 communicates with the injection port of the second valve 534 and extends into the first chamber 101; the fourth driving member 510 can drive the mounting plate 520 to move vertically, so as to drive the injection needle 531 to be inserted into the flared soft-pack battery 1; the injection plug 535 can push the electrolyte in the injection cup 532 into the injection needle 531 and inject it into the soft-pack battery 1.

[0073] In this embodiment, there are three sets of liquid injection components. The three sets of liquid injection components correspond to the clamping part 310 of the clamping component, and each set of liquid injection components includes two sets of liquid injection structures 530. That is, all the liquid injection structures 530 are arranged in a 2*3 array, which can simultaneously inject liquid into six soft-pack batteries 1 after the flaring in the sealed chamber, resulting in high liquid injection efficiency. The liquid injection cup 532 is used to temporarily store electrolyte. When the first valve 533 is open and the second valve 534 is closed, electrolyte can be injected into the flow channel 521 of the mounting plate 520 through the first valve 533, and the electrolyte enters the liquid injection cup 532 through the flow channel 521. When the first valve 533 is closed and the second valve 534 is open, by pressing down the liquid injection plug 535, the electrolyte in the liquid injection cup 532 can be pushed to the liquid injection needle 531 by pressure to inject liquid into the flared soft-pack battery 1. The dual-valve structure of this embodiment can ensure that there is no air backflow during the injection process, and avoid the air being introduced into the internal gap of the soft-pack battery 1 during injection, which would affect the wetting effect.

[0074] Of course, in other embodiments, the number of injection components is not limited to three sets, but can also be two sets, four sets or even more sets, depending on the number of clamping parts 310 of each set of clamping components installed in the second chamber 201.

[0075] For example, in order to improve the stability of the injection needle 531 moving up and down, the injection mechanism 500 of this embodiment is further provided with a fourth guide structure 540. The fourth guide structure 540 includes two spaced guide rods 541 and two sleeves 542. Each guide rod 541 is fitted with a sleeve 542. The guide rod 541 passes through the mounting plate 520. The sleeve 542 is fixedly connected to the mounting plate 520. The fourth driving member 510 drives the mounting plate 520 to move up and down along the guide rod 541.

[0076] In this embodiment, a sealing ring 550 is provided between the mounting plate 520 and the injection cup 532 to improve the sealing performance between the mounting plate 520 and the injection cup 532. The flow channel 521 opened in the mounting plate 520 includes a first channel and a second channel extending in a vertical direction, as well as a third channel and a fourth channel extending in a second direction. The first channel and the second channel are spaced apart along the second direction. The upper end of the first channel is connected to the upper end of the second channel through the third channel. The upper side of the third channel is open towards the cavity of the injection cup 532. One end of the fourth channel is connected to the lower end of the second channel, and the other end extends to the side wall of the mounting plate 520 and is connected to the first valve 533. The lower end of the first channel is connected to an interface, through which the second valve 534 is connected to the first channel.

[0077] Furthermore, the injection assembly also includes a fifth drive member 560, a second connector 570, and two pressure rods 580. The fifth drive member 560 is mounted on the mounting plate 520 and is connected to the second connector 570 in a transmission manner. The two pressure rods 580 protrude from the lower end of the second connector 570 and correspond one-to-one with the injection plugs 535. The fifth drive member 560 can drive the second connector 570 to move the pressure rods 580 in the vertical direction so that the pressure rods 580 abut against the injection plugs 535 and drive the injection plugs 535 to move downward.

[0078] In this embodiment, the fifth driving member 560 is mounted on the mounting plate 520. In the initial state, the pressure rod 580 and the liquid injection plug 535 are spaced apart. The fourth driving member 510 drives the mounting plate 520, the fifth driving member 560, the second connecting member 570 and the pressure rod 580 to move up and down synchronously. After the liquid injection needle 531 is inserted into the flared soft-pack battery 1 and the electrolyte is injected into the liquid injection cup 532, the fifth driving member 560 drives the second connecting member 570 to drive the pressure rod 580 to press down the liquid injection plug 535 to complete the liquid injection.

[0079] Since crystallization may occur when the electrolyte temperature decreases, the first valve 533 in this embodiment can also be connected to a heat pump. Hot air is introduced into the injection cup 532 through the flow channel 521 of the mounting plate 520 via the heat pump, thereby heating the electrolyte in the injection cup 532 and preventing electrolyte crystallization.

[0080] Furthermore, the vacuum liquid injection device for soft-pack batteries also includes a sixth driving member 600 and a fifth guiding structure 700. The sixth driving member 600 and the fifth guiding structure 700 are mounted on the frame 800. The sixth driving member 600 is connected to the first frame 100 in a transmission manner, and the fifth guiding structure 700 is connected to the upper end of the first frame 100 to guide the movement of the first frame 100 in the vertical direction. The sixth driving member 600 can drive the first frame 100 to move in the vertical direction.

[0081] The sixth driving member 600 can drive the first frame 100 to move vertically. Specifically, when clamping the soft-pack battery 1, the sixth driving member 600 can drive the first frame 100 to separate from the second frame 200, so that the external robot can clamp the soft-pack battery 1 and place it in the second chamber 201 at the position corresponding to the opened clamping part 310; after the soft-pack battery 1 is clamped and fixed, the sixth driving member 600 can drive the first frame 100 and the second frame 200 to close.

[0082] Optionally, all driving components in this embodiment can be cylinders, hydraulic cylinders, or linear motors, etc.

[0083] The working principle of the vacuum liquid injection device for pouch batteries in this embodiment is as follows:

[0084] (1) The robot arm grabs 3 pcs soft pack batteries 1 at a time, and grabs a total of 6 pcs soft pack batteries 1 in two times. The first drive component pushes open the first clamping plate 311 of the clamping part 310. The robot arm places the soft pack battery 1 between the first clamping plate 311 and the second clamping plate 312. After the soft pack battery 1 is in place, the first drive component 330 of the first drive component drives the push rod 350 to retract, and the clamping part 310 clamps and fixes the soft pack battery 1.

[0085] (2) The sixth driving component 600 drives the first frame 100 and the second frame 200 to press and close together to form a sealed chamber; the vacuuming mechanism is used to evacuate the sealed chamber to -95kPa (different vacuum levels can be achieved under the control of the proportional valve);

[0086] (3) The second driving component 420 drives the flaring structure 410 to flare the soft-pack battery 1.

[0087] (4) The pressure in the sealed chamber is adjusted to -60kPa by the vacuum mechanism. The fourth driving component 510 drives the mounting plate 520 to move the liquid injection structure 530 down, so that the liquid injection needle 531 is inserted into the flared soft-pack battery 1 and liquid injection is carried out in a vacuum environment.

[0088] (5) The sealed chamber is subjected to vacuum breaking treatment. At this time, the first drive assembly pushes open the first clamping plate 311 of the clamping part 310, so that the soft pack battery 1 can expand and absorb the electrolyte and be wetted by the electrolyte.

[0089] The electrolyte injection process can be carried out in stages (the pressure is -60 kPa during injection and -30 kPa when injection is paused, until wetting is completed; when wetting is complete, the pressure is maintained at -30 kPa for a period of time), which is beneficial for electrolyte wetting. The above-mentioned vacuuming and vacuum breaking can be repeated multiple times according to the electrolyte wetting situation.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vacuum liquid injection device for a pouch battery, characterized by, include: A first frame and a second frame located below the first frame, the first frame having a first chamber with an opening facing downwards, the second frame having a second chamber with an opening facing upwards, the first frame being able to close with the second frame to form a sealed chamber; A vacuuming mechanism is installed on the first frame or the second frame and communicates with the sealed chamber; A clamping mechanism, comprising a clamping component and a first driving component, wherein the clamping component is installed in the second cavity, and the first driving component is installed outside the second frame and passes through the side wall of the second frame to be connected to the clamping component in a transmission manner, wherein the driving component is capable of driving the clamping component to selectively clamp the soft pack battery; A flaring mechanism, comprising a flaring component and a second driving component, wherein the flaring component is installed in the first cavity, and the second driving component is installed outside the first frame and passes through the side wall of the first frame to be connected to the flaring component in a transmission manner, and the second driving component can drive the flaring component to flare the soft-pack battery. The liquid injection mechanism includes a liquid injection assembly and a third drive assembly installed on the upper end of the first frame. The liquid injection needle of the liquid injection assembly extends through the top wall of the first chamber into the first chamber and is sealed to the top wall of the first chamber. The third drive assembly can drive the liquid injection assembly to inject liquid into the flared soft-pack battery. 2.The soft-pack battery vacuum liquid injection device of claim 1, wherein, The width of the second chamber extends along the first direction, and the length of the second chamber extends along the second direction. The first direction, the second direction, and the vertical direction are perpendicular to each other. There are two sets of clamping assemblies, and the two sets of clamping assemblies are spaced apart in the second chamber along the first direction. Each set of clamping assemblies includes multiple clamping parts spaced apart along the second direction. Each clamping part includes an elastic guide and a first clamping plate and a second clamping plate arranged along the first direction. The second clamping plate is fixed in the second chamber. The first clamping plate is connected to the second clamping plate through the elastic guide. The elastic guide makes the first clamping plate always have a tendency to move toward the second clamping plate. The second frame is provided with a set of the first driving components on both outer sides along the first direction. The first driving components can be connected to the corresponding first clamping plate to drive the first clamping plate to move in a direction away from the second clamping plate. 3.The soft-pack battery vacuum liquid injection device according to claim 2, characterized in that, Each clamping part includes two elastic guide members spaced apart along the second direction. Each elastic guide member includes a guide rod, a sliding sleeve, a spring seat, and a spring. The guide rod extends along the first direction. One end of the guide rod is fixed to the cavity wall of the second chamber. The sliding sleeve is slidably sleeved on the guide rod and fixedly connected to the first clamping plate. The spring seat is sleeved on the guide rod and adjacent to the other end of the guide rod. The spring is located inside the spring seat and sleeved on the guide rod. The first clamping plate is located between the spring seat and the sliding sleeve. The spring abuts against the side of the first clamping plate opposite to the second clamping plate.

4. The vacuum liquid injection device for soft-pack batteries according to claim 3, characterized in that, The clamping part further includes an abutment seat, an abutment post, and a guide seat. The abutment seat protrudes from the side of the first clamping plate facing the second clamping plate. The guide seat passes through the cavity wall of the second chamber and is fixed on the cavity wall. The guide seat has a guide hole through it along the first direction. One end of the abutment post is slidably disposed in the guide hole, and the other end abuts against the abutment seat. The first driving assembly includes a base plate, a first driving member, a transmission plate, and a push rod. The first driving member is mounted on the base plate and is connected to the transmission plate to drive the transmission plate to move along the first direction. The number of push rods corresponds one-to-one with the number of clamping parts in each set of clamping assemblies, and the push rod is directly opposite the guide hole of the corresponding guide seat. The push rod is fixedly connected to the transmission plate, and the transmission plate can drive the push rod to extend into the guide hole and abut against the abutting post. 5.The soft-pack battery vacuum liquid injection device according to claim 2, characterized in that, The flaring assembly and the second driving assembly are in multiple sets. Each flaring assembly corresponds one-to-one with the clamping part of each set of clamping assemblies. Each set of flaring assemblies includes two flaring structures spaced apart along a first direction in the first cavity. Each of the two flaring structures corresponds one-to-one with the soft-pack battery clamped by the two clamping parts spaced apart along the first direction in the second cavity. Each set of second driving assemblies includes two second driving members that correspond one-to-one with the flaring structures. The second driving members are installed on the upper end of the first frame and pass through the top wall of the first frame to be connected to the flaring structure. The second driving members can drive the corresponding flaring structure to flare the soft-pack battery clamped by the clamping part. 6.The soft-pack battery vacuum liquid injection device according to claim 5, characterized in that, The flared structure includes a fixed plate, a first sliding part, a transmission part, and two sets of adsorption components. The fixed plate is fixed in the first chamber. Two first sliding parts are installed on the same side of the fixed plate along the second direction, and the two first sliding parts can slide relative to the fixed plate along the first direction. Each set of adsorption components is connected to one first sliding part. Each soft-pack battery located in the sealed chamber is located between the two sets of adsorption components. The second driving member is connected to the two first sliding parts through the transmission part. The second driving member can drive the transmission part to move in the vertical direction. The transmission part can drive the two first sliding parts to move the adsorption components closer to or further away from each other along the first direction. 7.The soft-pack battery vacuum liquid injection device according to claim 6, characterized in that, The flaring mechanism further includes multiple sets of liquid receiving structures corresponding one-to-one with the flaring assembly. Each liquid receiving structure includes a third driving member, a first connecting member, two connecting rods, two second sliding parts, and two liquid receiving trays for collecting electrolyte leaked from the injection mechanism. A second sliding part is provided on the side of the fixed plate opposite to the first sliding part. The second sliding part can slide relative to the fixed plate along the first direction. Each liquid receiving tray is connected to a second sliding part. Each second sliding part is connected to the first connecting member through a connecting rod. The third driving member is installed at the upper end of the first frame and passes through the top wall of the first frame to be connected to the first connecting member in the first chamber. The third driving member can drive the first connecting member to move in the vertical direction. The first connecting member can drive the two second sliding parts to move the liquid receiving trays closer to or further away from each other along the first direction. 8.The soft-pack battery vacuum liquid injection device according to claim 2, characterized in that, The liquid injection assembly is in multiple sets, and the number of liquid injection assemblies corresponds one-to-one with the number of clamping parts of the clamping assembly; each set of liquid injection assemblies includes a fourth driving member installed on the upper end of the first frame, a mounting plate, and two sets of liquid injection structures. The fourth driving member is connected to the mounting plate in a transmission manner, and the two sets of liquid injection structures are spaced apart along the first direction. Each injection structure includes an injection needle and an injection cup, a first valve, a second valve, and an injection plug located at the upper end of the first frame. The injection cup is mounted on the mounting plate and has a cavity with an open lower end. The lower end of the injection plug is inserted into the cavity from the top of the injection cup and seals against the cavity wall. The mounting plate has a flow channel communicating with the lower end of the cavity. The first valve is mounted on the outer periphery of the mounting plate and communicates with the flow channel for injecting electrolyte into the injection cup. The second valve is mounted on the lower end of the mounting plate and its inlet communicates with the flow channel. The injection needle communicates with the injection port of the second valve and extends into the first cavity. The fourth driving component can drive the mounting plate to move vertically, so as to drive the injection needle to be inserted into the flared soft-pack battery. The injection plug can push the electrolyte in the injection cup into the injection needle and inject it into the soft-pack battery. 9.The soft-pack battery vacuum liquid injection device according to claim 8, characterized in that, The injection assembly further includes a fifth driving member, a second connecting member, and two pressure rods. The fifth driving member is mounted on the mounting plate and is connected to the second connecting member in a transmission manner. The two pressure rods protrude from the lower end of the second connecting member and correspond one-to-one with the injection plugs. The fifth driving member can drive the second connecting member to move the pressure rods in the vertical direction so that the pressure rods abut against the injection plugs and drive the injection plugs to move downward. 10.The soft-pack battery vacuum liquid injection device according to any one of claims 1 to 9, characterized in that, It also includes a sixth driving component, which is mounted on the frame and connected to the first frame in a transmission manner. The sixth driving component is capable of driving the first frame to move in a vertical direction.

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