Liquid injection device

Abstract

The utility model relates to a liquid injection device which comprises an operation frame, a positioning assembly, an adsorption assembly and a liquid injection tank. The positioning assembly is installed on a side frame of the operation frame, the positioning assembly can make contact with a battery cell in the first direction and support the battery cell, the adsorption assembly is installed on the operation frame, the adsorption assembly can adsorb and pull open a liquid injection opening of the battery cell in the first direction, and the first direction is perpendicular to the height direction of the operation frame. The liquid injection tank is installed on the top frame of the operation frame, and a liquid outlet of the liquid injection tank can be in butt joint with the liquid injection opening so as to inject electrolyte into the battery cell. Compared with manual electrolyte injection, the electrolyte injection device has the advantages that the number of people needed in the battery cell electrolyte injection process is reduced, the electrolyte injection cost of the battery cell is reduced, namely, the processing cost of the battery cell and the lithium battery is reduced, meanwhile, the influence of too many people on the electrolyte injection environment is reduced, namely, the risk of chemical reaction of the electrolyte caused by high moisture in the electrolyte injection environment is reduced, and the service life of the electrolyte is prolonged. And the yield of the battery cell is improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery processing technology, and in particular to a liquid injection device. Background Technology

[0002] In lithium battery manufacturing, electrolyte needs to be injected into the cell through the injection port. When manufacturing small batches of experimental batteries, manual injection is required, and at least four people are needed to complete the operation each time: one to weigh the electrolyte, one to open the air bag to inject the electrolyte, one to seal the injection port, and one to record the data. Manual injection increases labor costs in the cell manufacturing process. Furthermore, too many people can negatively impact the injection environment, posing a risk of chemical reactions in the electrolyte due to high moisture levels. Utility Model Content

[0003] This application relates to a liquid injection device that reduces labor costs and also reduces the impact of personnel on moisture in the environment.

[0004] This application provides a liquid injection device, including a working frame, a positioning component, an adsorption component, and an injection tank. The positioning component is mounted on the side frame of the working frame and can contact and support the battery cell in a first direction. The adsorption component is mounted on the working frame and can adsorb and pull open the injection port of the battery cell in a first direction perpendicular to the height direction of the working frame. The injection tank is mounted on the top frame of the working frame, and the outlet of the injection tank can be connected to the injection port to inject electrolyte into the battery cell.

[0005] In this application, in the first direction, the battery cell is first supported by a positioning component, fixing it in a preset position. Then, an adsorption component pulls open the injection port, enlarging it. Finally, electrolyte is injected into the injection port through an injection tank to complete the electrolyte injection process. Compared to manual injection, the injection device reduces the number of personnel required for the battery cell injection process, thereby reducing the injection cost and consequently the processing cost of the battery cell and lithium battery. Simultaneously, it reduces the impact of excessive personnel on the injection environment, thus lowering the risk of chemical reactions in the electrolyte due to high moisture levels, and improving the battery cell yield.

[0006] In some possible designs, the positioning component includes a positioning element and a first drive element, the first drive element being mounted on the side frame of the work frame, the positioning element being drivenly connected to the first drive element, and the positioning element being able to support the battery cell in a first direction.

[0007] In some possible designs, the adsorption assembly includes an adsorption element and a second driving element, the second driving element being mounted on the side frame of the work frame, the adsorption element being drivenly connected to the second driving element, and the adsorption element being able to adsorb and open the injection port in a first direction.

[0008] In some possible designs, the injection device also includes an adjustment component that is driven to connect with the positioning component and the adsorption component, and the adjustment component is capable of driving the positioning component and the adsorption component to move along the height direction of the work frame.

[0009] In some possible designs, the adjustment components include a drive unit, and the positioning components and adsorption components on the same side frame are driven and connected to the drive unit, which can drive the positioning components and adsorption components to move synchronously in the height direction of the work frame.

[0010] In some possible designs, the driving components include a third driving component and a fourth driving component, with the third driving component being driven to connect with the positioning component and the fourth driving component being driven to connect with the adsorption component.

[0011] In some possible designs, the injection tank also includes a switch valve installed at the outlet. The switch valve can open or close the outlet and can be a manual valve or a solenoid valve.

[0012] In some possible designs, the injection device also includes a fixing member, which is arranged along the height of the injection tank on the working frame. The fixing member can be used to abut against the battery cell for pre-positioning. The fixing member includes at least a first fixing part and a second fixing part, which are connected to form an L-shaped, V-shaped, or T-shaped structure.

[0013] In some possible designs, the injection device also includes an injection platform, with the work frame and fixtures all mounted on the injection platform.

[0014] In some possible designs, the injection device also includes a weighing component, which is mounted on the injection platform, and a fixing element is mounted on the weighing component.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the liquid injection device provided in this application in one embodiment;

[0017] Figure 2 for Figure 1 Front view;

[0018] Figure 3 A partial structural schematic diagram of the liquid injection device provided in this application in one embodiment;

[0019] Figure 4 A partial structural schematic diagram of the liquid injection device provided in this application in another embodiment;

[0020] Figure 5 for Figure 1A schematic diagram of the structure of the injection tank in one embodiment;

[0021] Figure 6 for Figure 5 Enlarged view of a portion of the structure in section A;

[0022] Figure 7 for Figure 1 A schematic diagram of the structure of the fastener in one embodiment;

[0023] Figure 8 for Figure 1 A schematic diagram of the structure of the fastener in another embodiment;

[0024] Figure 9 for Figure 1 A schematic diagram of the structure of the fastener in another embodiment;

[0025] Figure 10 for Figure 1 A schematic diagram of the structure of the fastener in another embodiment;

[0026] Figure 11 for Figure 10 Front view.

[0027] Figure label:

[0028] 01-Battery cell; 1-Injection platform; 11-Working frame; 111-Slide groove; 112-Side frame; 113-Top plate; 2-Positioning assembly; 21-Positioning component; 22-First driving component; 3-Adsorption assembly; 31-Adsorption component; 32-Second driving component; 4-Injection tank; 41-Tank body; 411-Inner cavity; 42-Body body; 43-Cover body; 44-Rotating shaft; 45-Bushing bushing; 5-Fixing component; 51-First fixing part; 511-First surface; 52-Second fixing part; 521-Second surface; 522-Third surface; 53-Third fixing part; 6-Adjusting assembly; 61-Driving component; 611-Third driving component; 612-Fourth driving component; 62-Lead screw; 621-First lead screw; 622-Second lead screw; 7-Switch valve; 8-Weighing assembly.

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0030] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0032] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0035] This application provides a liquid injection device, such as... Figure 1 As shown, the liquid injection device includes a working frame 11, a positioning assembly 2, an adsorption assembly 3, and a liquid injection tank 4. The working frame 11 includes a side frame 112 extending along its own height direction Z and a top frame 113 extending along a first direction X. The number of side frames 112 is at least one. Figure 1 The example shows two side frames 112 arranged along the first direction X. Figure 1 The two ends of the top frame 113 are connected to the side frames 112 on both sides in the first direction X. For example, the first direction X is parallel to the length direction of the injection device, and the height direction Z of the working frame 11 is parallel to the height direction of the injection device.

[0036] Positioning component 2 is mounted on side frame 112. Positioning component 2 can contact battery cell 01 in the first direction X and support battery cell 01. Positioning component 2 can be mounted on only one side frame 112, or positioning component 2 can be mounted on both side frames 112 arranged along the first direction X, with the positioning components 2 on both sides symmetrically arranged, that is, the positioning components 2 on both sides can clamp battery cell 01 in the first direction X.

[0037] The adsorption component 3 is mounted on the side frame 112. The adsorption component 3 can adsorb and open the liquid injection port of the battery cell 01 in the first direction X. The adsorption component 3 can be mounted on only one side of the side frame 112, or the adsorption component 3 can be mounted on both side frames 112 arranged along the first direction X, with the adsorption components 3 on both sides symmetrically arranged.

[0038] The electrolyte injection tank 4 is installed on the top frame 113. The outlet of the electrolyte injection tank 4 can be connected to the electrolyte injection port of the battery cell 01 to inject electrolyte into the battery cell 01. Figure 1 As shown, in the height direction Z of the work frame 11, the arrangement height of the adsorption component 3 is higher than that of the positioning component 2, and the arrangement height of the injection tank 4 is higher than that of the adsorption component 3. That is, the injection tank 4 is located above the adsorption component 3, and the adsorption component 3 is located above the positioning component 2.

[0039] The outlet of the liquid injection tank 4 can be inserted into the liquid injection port of the battery cell 01 to form a connection between the outlet and the injection port. Alternatively, the outlet of the liquid injection tank 4 is located directly above the injection port of the battery cell 01 in the height direction Z of the working frame 11, that is, the outlet and the injection port are directly opposite each other in the height direction Z of the working frame 11 to form a connection between the outlet and the injection port. This application embodiment does not impose any special limitation on the connection method between the outlet and the injection port.

[0040] In this embodiment, in the first direction X, the positioning component 2 first supports the battery cell 01, fixing it in a preset position. Then, the adsorption component 3 pulls open the injection port, enlarging it. Finally, the injection tank 4 injects electrolyte into the injection port, completing the electrolyte injection process for the battery cell 01. Compared to manual injection, the injection device saves the number of personnel required for the battery cell 01 injection process, thereby reducing the injection cost of the battery cell 01 and consequently reducing the processing cost of the battery cell 01 and the lithium battery. Simultaneously, it reduces the impact of excessive personnel on the injection environment, thus lowering the risk of chemical reactions in the electrolyte due to high moisture levels in the injection environment, and improving the yield of the battery cell 01.

[0041] like Figure 1 and Figure 2 As shown, the positioning component 2 includes a positioning element 21 and a first driving element 22. The positioning element 21 is mounted on the side frame 112 of the working frame 11. The positioning element 21 is driven to connect with the first driving element 22. The first driving element 22 can drive the positioning element 21 to move along the first direction X so that the positioning element 21 is close to or away from the battery cell 01. That is, the positioning element 21 can contact and support the battery cell 01 in the first direction X.

[0042] In this embodiment, the positioning component 21 is moved by the first driving component 22. During the process of placing the battery cell 01 before liquid injection and removing the battery cell 01 after liquid injection, the space for picking up and placing the battery cell 01 is increased. This reduces the risk of interference with the positioning component 2 during the picking up and placing of the battery cell 01, which may cause damage to the positioning component 2 or the battery cell 01. This is beneficial to extending the service life of the liquid injection device and improving the processing yield of the battery cell 01 and the lithium battery.

[0043] Furthermore, when positioning components 2 are symmetrically arranged on the two side frames 112 arranged along the first direction X, the positioning component 21 is driven to move in the first direction X by the first driving component 22, so that the two positioning components 2 arranged along the first direction X can clamp battery cells 01 of different thicknesses, thereby expanding the range of battery cell 01 thickness applicable to the liquid injection device and thus improving the applicability of the liquid injection device.

[0044] like Figure 1 and Figure 2 As shown, the adsorption assembly 3 includes an adsorption element 31 and a second driving element 32. The second driving element 32 is mounted on the side frame 112. The adsorption element 31 is driven to connect with the second driving element 32. The second driving element 32 can drive the adsorption element 31 to move along the first direction X so that the adsorption element 31 is close to or away from the battery cell 01. That is, the adsorption element 31 can adsorb and pull open the liquid injection port of the battery cell 01 in the first direction X.

[0045] In this embodiment, the adsorption component 31 is driven to move in the first direction X by the second driving component 32. During the process of placing the battery cell 01 before liquid injection and removing the battery cell 01 after liquid injection, the space for picking up and placing the battery cell 01 is increased, thereby reducing the risk of interference with the adsorption component 3 during the picking up and placing of the battery cell 01, which may cause damage to the adsorption component 3 or the battery cell 01. This is beneficial to extending the service life of the liquid injection device and improving the processing yield of the battery cell 01 and the lithium battery.

[0046] Furthermore, when the adsorption components 3 are symmetrically arranged on the two side frames 112 arranged along the first direction X, the adsorption component 31 is driven to move in the first direction X by the second driving component 32, so that the adsorption component 3 can adsorb the liquid injection port of the battery cell 01 with different thicknesses, thereby expanding the thickness range of the battery cell 01 applicable to the liquid injection device and thus improving the applicability of the liquid injection device.

[0047] like Figure 3 As shown, the liquid injection device also includes an adjustment component 6, which is drivenly connected to the positioning component 2 and the adsorption component 3. The adjustment component 6 can drive the positioning component 2 and the adsorption component 3 to move in the height direction Z of the working frame 11.

[0048] In this embodiment, by adjusting the position of the positioning component 2 and the adsorption component 3 in the height direction Z of the liquid injection device, the positioning component 2 and the adsorption component 3 can position and adsorb battery cells 01 of different heights, thereby further expanding the thickness range of battery cells 01 applicable to the liquid injection device and thus improving the applicability of the liquid injection device.

[0049] In some embodiments, the adjustment component 6 includes a drive component 61. The positioning component 2 and the adsorption component 3 on the same side frame 112 can both be connected to the drive component 61. The drive component 61 can drive the positioning component 2 and the adsorption component 3 to move synchronously in the height direction Z of the work frame 11.

[0050] In this embodiment, the driving component 61 drives the positioning component 2 and the adsorption component 3 to move synchronously, which improves the accuracy of the relative position of the positioning component 2 and the adsorption component 3, reduces the risk of the distance between the positioning component 2 and the adsorption component 3 in the height direction Z of the working frame 11 changing, thereby reducing the risk that the adsorption component 3 cannot accurately adsorb the liquid injection port of the battery cell 01, and improving the working reliability of the adsorption component 3.

[0051] The connection between the driving component 61 and the positioning component 2, and between the driving component 61 and the adsorption component 3, can be either a cylinder-connecting rod or a motor-lead screw. In this embodiment, as shown... Figure 3 As shown, the adjustment component 6 includes a drive component 61 and a lead screw 62. The positioning component 2 and the adsorption component 3 on the same side frame 112 are both threadedly connected to the same lead screw 62. The drive component 61 is driven to drive the lead screw 62 to rotate around its own axis. The lead screw 62 can drive the positioning component 2 and the adsorption component 3 to move synchronously along the height direction Z of the working frame 11, so that the positioning component 2 and the adsorption component 3 are closer to or further away from the injection platform 1.

[0052] In this embodiment, the driving component 61 is connected to the positioning component 2 and the adsorption component 3 by a lead screw 62, which improves the accuracy of the driving component 61 in adjusting the height of the positioning component 2 and the adsorption component 3, and simplifies the structure of the adjustment component 6, thereby reducing the cost of the adjustment component 6, and thus reducing the size and cost of the liquid injection device.

[0053] In other embodiments, such as Figure 4 As shown, the driving component 61 includes a third driving component 611 and a fourth driving component 612. The positioning component 2 and the adsorption component 3 on the same side frame 112 are driven connected to the third driving component 611 and the fourth driving component 612, respectively. For example, the positioning component 2 is driven connected to the third driving component 611, and the adsorption component 3 is driven connected to the fourth driving component 612.

[0054] In this embodiment, the third driving component 611 can drive the positioning component 2 to move along the height direction Z of the working frame 11, and the fourth driving component 612 can drive the adsorption component 3 to move along the height direction Z of the working frame 11. This increases the adjustability of the distance between the positioning component 2 and the adsorption component 3 in the height direction Z of the working frame 11. When the adsorption component 3 adsorbs the liquid injection port of the battery cell 01, the support effect of the positioning component 2 on the battery cell 01 can be improved by adjusting the position of the positioning component 2 in the height direction Z of the working frame 11.

[0055] The connection between the third driving component 611 and the positioning component 2, and between the fourth driving component 612 and the adsorption component 3, can be a cylinder-connecting rod or a motor-screw connection. In this embodiment, as shown... Figure 4 As shown, the lead screw 62 includes a first lead screw 621 and a second lead screw 622. The positioning component 2 and the adsorption component 3 on the same side frame 112 are threadedly connected to the first lead screw 621 and the second lead screw 622, respectively. For example, the positioning component 2 is threadedly connected to the first lead screw 621, and the first lead screw 621 is drivenly connected to the third driving member 611. The third driving member 611 can drive the first lead screw 621 to rotate around its own axis. The first lead screw 621 can drive the positioning component 2 to move along the height direction Z of the working frame 11. The adsorption component 3 is threadedly connected to the second lead screw 622, and the second lead screw 622 is drivenly connected to the fourth driving member 612. The fourth driving member 612 can drive the second lead screw 622 to rotate around its own axis, and the second lead screw 622 can drive the adsorption component 3 to move along the height direction Z of the liquid injection device.

[0056] In this embodiment, the third driving component 611 is connected to the positioning component 2 via the first lead screw 621, and the fourth driving component 612 is connected to the adsorption component 3 via the second lead screw 622. This improves the accuracy of the height adjustment of the positioning component 2 by the third driving component 611 and the adsorption component 3 by the fourth driving component 612, and simplifies the structure of the adjustment component 6, thereby reducing the cost of the adjustment component 6, and further reducing the size and cost of the liquid injection device.

[0057] like Figure 1 and Figure 2 As shown, the working frame 11 has a mounting cavity (not shown in the figure), and at least a portion of the lead screw 62 is located in the mounting cavity, thereby reducing the risk of damage to the lead screw 62 under external force and extending the service life of the adjusting assembly 6 and the liquid injection device.

[0058] like Figure 1 and Figure 2As shown, the work frame 11 has a slide groove 111 extending in the height direction Z of the work frame 11. The mounting cavity is connected to the outside through the slide groove 111. A part of the structure of the positioning component 2 and the adsorption component 3 is located in the slide groove 111 and abuts against the side wall of the slide groove 111. In the height direction Z of the work frame 11, the positioning component 2 and the adsorption component 3 can move along the slide groove 111, and the slide groove 111 can restrict the rotation of the positioning component 2 and the adsorption component 3 around the axis of the lead screw 62.

[0059] In this embodiment, as the positioning component 2 and the adsorption component 3 move along the height direction Z of the working frame 11, they also move along the slide groove 111. This improves the accuracy of the movement direction of the positioning component 2 and the adsorption component 3, thereby enhancing their operational reliability. Furthermore, the slide groove 111 restricts the rotation of the positioning component 2 and the adsorption component 3 around the axis of the lead screw 62, reducing the risk that the positioning component 2 and the adsorption component 3 will rotate under the drive of the lead screw 62 and fail to move along the height direction Z of the injection device.

[0060] like Figure 5 As shown, the injection tank 4 includes a tank body 41, which has an inner cavity 411 for containing electrolyte. The tank body 41 is provided with an outlet, and the inner cavity 411 is connected to the outside through the outlet. The injection tank 4 also includes a switch valve 7, which is installed at the outlet. The switch valve 7 can open or close the outlet. The switch valve 7 is a manual valve or a solenoid valve.

[0061] In this embodiment, the amount of electrolyte injected into the cell 01 can be controlled by opening or closing the switching valve 7, thereby reducing the difficulty of controlling the amount of electrolyte injected. When the switching valve 7 is a manual valve, the cost of the switching valve 7 is reduced; when the switching valve 7 is a solenoid valve, the response speed of opening or closing the switching valve 7 is improved, which in turn helps to improve the control accuracy of the amount of electrolyte injected.

[0062] like Figure 5 and Figure 6 As shown, the can body 41 includes a body 42 and a cover 43. The cover 43 covers the body 42, and the body 42 and the cover 43 form an inner cavity 411. One of the body 42 and the cover 43 is provided with a rotating shaft 44, and the other is provided with a bushing 45. The bushing 45 is fitted onto the rotating shaft 44 and can rotate relative to the rotating shaft 44 around its own axis to open or close the cover 43.

[0063] In this embodiment, the body 42 and the cover 43 are hinged together by a rotating shaft 44 and a bushing 45, so that the cover 43 can rotate around the axis of the rotating shaft 44, thereby realizing the opening or closing of the cover 43, simplifying the operation of injecting electrolyte into the injection tank 4, which helps to shorten the working cycle of the injection device and improve the working efficiency of the injection device.

[0064] like Figure 1 and 2 As shown, the liquid injection device also includes a fixing member 5. The fixing member 5 and the liquid injection tank 4 are arranged along the height direction Z of the working frame 11. The fixing member 5 can be used to abut against the battery cell 01 to pre-position the battery cell 01.

[0065] In this embodiment, the battery cell 01 is first pre-positioned by the fixing member 5, and then the battery cell 01 is clamped and fixed by the positioning component 2. This simplifies the positioning difficulty of the battery cell 01 and helps to improve the positioning accuracy of the battery cell 01, which in turn helps to improve the liquid injection effect of the liquid injection device.

[0066] like Figure 1 and 2 As shown, the injection device also includes an injection platform 1, and the working frame 11 and the fixing component 5 are all installed on the injection platform 1.

[0067] In this embodiment, the work frame 11 and the fixing component 5 are installed on the liquid injection platform 1. The positioning component 2, the adsorption component 3 and the liquid injection tank 4 are all installed on the work frame 11, which improves the accuracy of the relative positions of the positioning component 2, the adsorption component 3, the liquid injection tank 4 and the fixing component 5. After the battery cell 01 is placed on the fixing component 5, the accuracy of the positioning component 2 supporting the battery cell 01, the adsorption component 3 adsorbing the liquid injection port, and the liquid injection of the liquid injection tank 4 is improved, thereby improving the reliability and stability of the liquid injection device.

[0068] like Figure 7 As shown, the fixing member 5 includes at least a first fixing part 51 and a second fixing part 52. The first fixing part 51 is connected to the liquid injection platform 1, and the second fixing part 52 can contact the battery cell 01 in the first direction X and support the battery cell 01 to pre-position the battery cell 01.

[0069] In one embodiment, the first fixing part 51 and the second fixing part 52 can be connected as follows: Figure 7 The L-shaped or V-shaped structure shown, in this case, such as Figure 7 As shown, in the height direction Z of the work frame 11, the first fixing part 51 includes a first surface 511, which is located on the side of the first fixing part 51 away from the liquid injection platform 1. In the first direction X, the second fixing part 52 includes a second surface 521 and a third surface 522. The second surface 521 is used to contact the battery cell 01, and the third surface 522 is located on the side of the second fixing part 52 away from the battery cell 01. The first surface 511 and the third surface 522 form a right angle or an acute angle.

[0070] In another embodiment, the first fixing part 51 and the second fixing part 52 can be connected as follows: Figure 8 The L-shaped and V-shaped structures shown are, in this case, as Figure 8 As shown, the second surface 521 and the third surface 522 form a right angle or an obtuse angle.

[0071] In another embodiment, the first fixing part 51 and the second fixing part 52 can be connected as follows: Figure 9 The T-shaped structure shown, at this time, as Figure 9 As shown, the first surface 511 and the third surface 522 form an acute angle, and the second surface 521 and the third surface 522 form an obtuse angle.

[0072] In the above three embodiments, the second fixing part 52 is placed at an angle, so that an obtuse angle or an acute angle is formed between the first surface 511 and the second surface 521, and between the first surface 511 and the third surface 522. When the battery cell 01 is placed on the fixing member 5, the battery cell 01 can be tilted and abut against the second fixing part 52. After that, the battery cell 01 is pushed by the movement of the positioning member 21, and finally the battery cell 01 abuts against the positioning members 21 on both sides at the same time. The battery cell 01 is clamped and fixed by the positioning members 21 on both sides in the first direction X.

[0073] In this embodiment, the second fixing part 52 is placed at an angle, which reduces the accuracy requirement of the placement angle of the battery cell 01 on the fixing member 5, thereby reducing the difficulty of placing the battery cell 01 on the fixing member 5. The positioning member 21 is driven to move by the first driving member 22, and the positioning member 21 pushes the battery cell 01, so that the battery cell 01 is finally positioned in the preset position, which improves the positioning accuracy of the battery cell 01, thereby improving the accuracy of the electrolyte injection tank 4 into the battery cell 01, reducing the risk of electrolyte overflow caused by the electrolyte injection port of the battery cell 01 deviating from the electrolyte injection tank 4, thereby reducing the waste of electrolyte during the processing of the battery cell 01, and thus reducing the cost of the battery cell 01 and the lithium battery. At the same time, it reduces the risk of environmental pollution or even safety problems caused by electrolyte overflow, and improves the safety of the electrolyte injection process.

[0074] like Figure 10 and Figure 11 As shown, the fastener 5 also includes a third fastening part 53. The third fastening part 53 and the second fastening part 52 are arranged along the first direction X, and the third fastening part 53 and the second fastening part 52 are symmetrically arranged. The axis of symmetry between the third fastening part 53 and the second fastening part 52 is parallel to the height direction Z of the work frame 11.

[0075] In this embodiment, during the process of placing the battery cell 01 onto the fixing member 5, the battery cell 01 can tilt to the left to abut against the second fixing part 52, or tilt to the right to abut against the third fixing part 53, thereby further reducing the accuracy requirement of the placement angle of the battery cell 01 on the fixing member 5, and thus reducing the difficulty of placing the battery cell 01 on the fixing member 5.

[0076] Among them, such as Figure 3As shown, in the first direction X, the fixing member 5 pre-positions the battery cell 01, and the positioning component 2 precisely positions the battery cell 01. The direction perpendicular to the first direction X and the height direction Z of the working frame 11 is denoted as the second direction Y. In the second direction Y, the placement position of the battery cell 01 can be manually adjusted by the operator so that the liquid injection port of the battery cell 01 is aligned with the liquid outlet of the liquid injection tank 4 in the height direction Z of the working frame 11, so that the liquid injection tank 4 can accurately inject electrolyte into the battery cell 01.

[0077] The fastener 5 can be directly fixed to the injection platform 1, or it can be fixed to other structures on the injection platform 1. For example... Figure 1 and Figure 2 As shown, the liquid injection device also includes a weighing component 8, which is installed on the liquid injection platform 1. The fixing component 5 is fixed on the weighing component 8. The weighing component 8 is used to support the battery cell 01 and measure the weight of the battery cell 01.

[0078] In this embodiment, during the process of injecting electrolyte into the cell 01 from the injection tank 4, the weighing component 8 can measure the weight of the cell 01 in real time. The operator can judge the amount of electrolyte injected based on the weight change of the cell 01, so that the operator can open or close the switch valve 7 of the injection tank 4 in a timely manner. The weighing component 8 improves the control accuracy of the electrolyte injection amount, reduces the impact on the performance of the cell 01 due to insufficient electrolyte injection, and thus helps improve the processing yield of the cell 01 and lithium battery. It also reduces the risk of electrolyte overflow due to excessive electrolyte injection, which could pollute the environment or even cause safety problems. This reduces electrolyte waste during the cell 01 processing, thereby reducing the cost of the cell 01 and lithium battery. Simultaneously, it reduces the risk of electrolyte overflow causing environmental pollution or safety problems, improving the safety of the injection process.

[0079] When the switch valve 7 of the injection tank 4 is a solenoid valve, the injection device may also include a control system. The solenoid valve and the weighing component 8 are electrically or signal connected to the control system. The weighing component 8 can transmit the measured weight of the battery cell 01 to the control system. The control system compares the weight of the battery cell 01 with the target weight. When the weight of the battery cell 01 is the same as the target weight, the control system controls the solenoid valve to close, so that the injection device stops injecting liquid, which can further improve the control accuracy of the amount of electrolyte injected into the battery cell 01.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid injection device, characterized in that, The injection device includes: Work rack (11); Positioning component (2), which is mounted on the side frame (112) of the work frame (11), and can contact the battery cell (01) in the first direction (X) and support the battery cell (01); Adsorption component (3), the adsorption component (3) is installed on the working frame (11), the adsorption component (3) can adsorb and pull open the liquid injection port of the battery cell (01) in the first direction (X), the first direction (X) is perpendicular to the height direction (Z) of the working frame (11); The liquid injection tank (4) is installed on the top frame (113) of the working frame (11). The liquid outlet of the liquid injection tank (4) can be connected to the liquid injection port to inject electrolyte into the battery cell (01).

2. The liquid injection device according to claim 1, characterized in that, The positioning component (2) includes a positioning element (21) and a first driving element (22). The first driving element (22) is mounted on the side frame (112). The positioning element (21) is driven to connect with the first driving element (22). The positioning element (21) can support the battery cell (01) in the first direction (X).

3. The liquid injection device according to claim 1, characterized in that, The adsorption assembly (3) includes an adsorption element (31) and a second driving element (32). The second driving element (32) is mounted on the side frame (112). The adsorption element (31) is driven to connect with the second driving element (32). The adsorption element (31) can adsorb and open the injection port in the first direction (X).

4. The liquid injection device according to claim 1, characterized in that, The injection device further includes an adjustment component (6), which is drivenly connected to the positioning component (2) and the adsorption component (3). The adjustment component (6) can drive the positioning component (2) and the adsorption component (3) to move along the height direction (Z) of the work frame (11).

5. The liquid injection device according to claim 4, characterized in that, The adjustment component (6) includes a drive component (61). The positioning component (2) and the adsorption component (3) on the same side frame (112) are both driven to be connected to the drive component (61). The drive component (61) can drive the positioning component (2) and the adsorption component (3) to move synchronously in the height direction (Z) of the work frame (11).

6. The liquid injection device according to claim 4, characterized in that, The driving component (61) includes a third driving component (611) and a fourth driving component (612). The third driving component (611) is driven to be connected to the positioning component (2), and the fourth driving component (612) is driven to be connected to the adsorption component (3).

7. The liquid injection device according to any one of claims 1 to 6, characterized in that, The injection tank (4) also includes a switch valve (7), which is installed at the outlet. The switch valve (7) can open or close the outlet. The switch valve (7) is a manual valve or a solenoid valve.

8. The liquid injection device according to any one of claims 1 to 6, characterized in that, The liquid injection device also includes a fixing member (5), which is arranged along the height direction (Z) of the working frame (11) with the liquid injection tank (4). The fixing member (5) can be used to abut against the battery cell (01) to pre-position the battery cell (01). The fastener (5) includes at least a first fastening part (51) and a second fastening part (52), wherein the first fastening part (51) and the second fastening part (52) are connected to form an L-shaped, V-shaped or T-shaped structure.

9. The liquid injection device according to claim 8, characterized in that, The injection device also includes an injection platform (1), and the working frame (11) and the fixing component (5) are both installed on the injection platform (1).

10. The liquid injection device according to claim 9, characterized in that, The liquid injection device further includes a weighing component (8), which is installed on the liquid injection platform (1), and the fixing member (5) is installed on the weighing component (8).

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