Negative pressure formation assembly
By designing a negative pressure formation component, the problem of electrolyte contamination at the injection port during lithium battery formation was solved, enabling automatic collection and recycling of electrolyte, thereby improving production efficiency and reducing costs.
Patent Information
- Application Number
- CN202423177633.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-20
AI Technical Summary
During the formation process of lithium batteries, negative pressure formation can cause electrolyte contamination at the cell's injection port, leading to poor welding and affecting production efficiency and product quality.
Design a negative pressure formation component, including a negative pressure cup, a negative pressure channel, and a collection component. When the other end of the negative pressure channel is separated from the injection port, the collection component collects the dripping electrolyte to avoid contamination. The collection and recycling of electrolyte are achieved through the cooperation of elastic and blocking components.
It effectively avoids electrolyte contamination of the injection port, improves production efficiency, reduces production costs, and eliminates the need for manual wiping, thus improving battery production quality.
Smart Images
Figure CN223828468U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of batteries, in particular to a negative pressure formation assembly. BACKGROUND
[0002] The preparation process of a lithium battery mainly consists of homogenization, coating, rolling, lamination or winding, assembly, liquid injection, formation, electrical performance screening, and packaging. Among them, the formation is to place the battery cell after liquid injection in a high-temperature environment, and charge the battery cell with a small current to activate the active material on the positive current collector of the battery cell. The lithium ions released by the positive active material are free to the negative electrode through the separator to form an SEI film to ensure the stability of the chemical interface of the battery.
[0003] In the related art, the formation of the battery cell is carried out under negative pressure. There is a negative pressure of-50kpa to 80kpa in the negative pressure cup, and the negative pressure nozzle is sealed and connected with the liquid injection port of the battery cell. Small molecule gas generated by the reaction of the battery cell under high temperature and small current conditions can be adsorbed into the negative pressure cup to avoid the swelling of the battery. Due to the action of negative pressure, part of the electrolyte in the battery cell will be adsorbed into the negative pressure cup together with the small molecule gas through the negative pressure channel.
[0004] However, after the battery cell ends the negative pressure formation, the negative pressure nozzle is separated from the liquid injection port, and the electrolyte may contaminate the liquid injection port, resulting in explosion welding and poor welding pit during the welding process, which seriously affects the production efficiency and product quality. CONTENT OF THE INVENTION
[0005] In view of the deficiencies of the prior art, the present application provides a negative pressure formation assembly to solve the technical problem of electrolyte contaminating the liquid injection port of the battery cell in the prior art.
[0006] To solve the above problems, the present application provides a negative pressure formation assembly, which comprises:
[0007] a collection assembly;
[0008] a negative pressure cup provided with a negative pressure cavity and a negative pressure channel, one end of the negative pressure channel being in communication with the negative pressure cavity;
[0009] wherein, when the battery cell ends the negative pressure formation, the other end of the negative pressure channel is configured to be separated from the liquid injection port of the battery cell, and the collection assembly is configured to collect the electrolyte dripping at the other end of the negative pressure channel.
[0010] Further, in the negative pressure formation assembly provided by the present application, the other end of the negative pressure channel is also configured to be sealed and connected with the liquid injection port to form the battery cell under negative pressure.
[0011] Still further, in the negative pressure formation assembly provided by the present application, the other end of the negative pressure channel is sealed and connected with the liquid injection port by a negative pressure nozzle to form the battery cell under negative pressure.
[0012] Further, in the negative pressure formation assembly provided in the present application, the collecting assembly comprises an elastic member and a blocking member;
[0013] One end of the elastic member is connected with the negative pressure cup, and the other end of the elastic member is connected with the blocking member.
[0014] When the battery cell ends the negative pressure formation, the elastic member changes from the tension state to the recovery deformation state, so as to move the blocking member to the other end of the negative pressure channel to collect the electrolyte.
[0015] Further, in the negative pressure formation assembly provided in the present application, the blocking member comprises a blocking member made of an electrolyte corrosion-resistant material; or / and,
[0016] The surface of the blocking member is provided with a corrosion-resistant soft rubber.
[0017] Further, in the negative pressure formation assembly provided in the present application, when the battery cell is subjected to the negative pressure formation, the other end of the negative pressure channel is arranged at the side of the blocking member away from the elastic member; and when the battery cell ends the negative pressure formation, the other end of the negative pressure channel is arranged at the side of the blocking member close to the elastic member.
[0018] Further, in the negative pressure formation assembly provided in the present application, the blocking member comprises a first baffle and a second baffle.
[0019] The first baffle and the second baffle are rotationally connected, and both the first baffle and the second baffle are connected with the elastic member.
[0020] Further, in the negative pressure formation assembly provided in the present application, when the battery cell is subjected to the negative pressure formation, the included angle between the first baffle and the second baffle towards the negative pressure cup is greater than a preset threshold value; and when the battery cell ends the negative pressure formation, the included angle is less than the preset threshold value.
[0021] Further, in the negative pressure formation assembly provided in the present application, the elastic member comprises a first spring and a second spring.
[0022] One end of the first spring and one end of the second spring are both connected with the bottom of the negative pressure cup, the other end of the first spring is connected with the first baffle, and the other end of the second spring is connected with the second baffle.
[0023] Further, in the negative pressure formation assembly provided in the present application, the collecting assembly further comprises at least one collecting pipeline.
[0024] One end of the collecting pipeline is in communication with the side of the blocking member close to the negative pressure cup.
[0025] The application provides a negative pressure formation assembly, which comprises a negative pressure cup, a negative pressure channel and a collection assembly, the negative pressure cup is provided with a negative pressure cavity, one end of the negative pressure channel is in communication with the negative pressure cavity; when the negative pressure formation of the battery cell ends, the other end of the negative pressure channel is configured to be separated from the liquid injection port of the battery cell, and the collection assembly is configured to collect the electrolyte dripping at the other end of the negative pressure channel, so that the technical problem that the electrolyte pollutes the liquid injection port of the battery cell can be avoided, manual wiping at the liquid injection port is not needed, the production efficiency of the battery is improved, and the production cost of the battery is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.
[0027] Figure 1 The negative pressure formation assembly provided by the embodiments of the application is a structural schematic diagram of a battery cell in a negative pressure formation state.
[0028] Figure 2 The negative pressure formation assembly provided by the embodiments of the application is a structural schematic diagram of a battery cell in a negative pressure formation state.
[0029] Figure 3 The negative pressure formation assembly provided by the embodiments of the application is a structural schematic diagram of a battery cell in a negative pressure formation state.
[0030] Figure 4 The negative pressure formation assembly provided by the embodiments of the application is a structural schematic diagram of a battery cell in a negative pressure formation state.
[0031] Reference signs:
[0032] 100, negative pressure cup; 101, negative pressure cavity; 102, negative pressure channel; 200, collection assembly; 210, elastic member; 211, first spring; 212, second spring; 220, blocking member; 221, first baffle; 222, second baffle; 230, collection pipeline; 300, negative pressure suction nozzle; 400, battery cell; 401, liquid injection port; 402, pole; 403, electrolyte. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.
[0034] It should be understood that the terms "comprises" and "comprising," when used in this specification and the following claims, indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0035] It should also be understood that the terms used herein in this specification of the application solely are for the purpose of describing specific embodiments and are not intended to limit the application. As used in this specification and the appended claims, the singular forms "a," "an" and "the" encompass plural referents unless the context clearly dictates otherwise.
[0036] It should further be understood that the term "and / or" as used in this specification and the claims, if and when used, means any one of the items, or combinations of items, listed are possible and all possible combinations and permutations of these items are encompassed as well.
[0037] In addition, in this application, unless specifically stated otherwise or the context clearly dictates otherwise, the terms "mounting", "connected", "connecting", and "fixed" and the like appearing in embodiments are to be construed in a broad sense, for example, connecting can be fixed connection, or detachable connection, or integral, can be understood, or can be mechanical connection, electrical connection, etc. Of course, it can also be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific implementation situation.
[0038] In the related art, when the battery cell ends the negative pressure formation, the negative pressure cup is lifted to separate the negative pressure nozzle from the liquid injection port, and the negative pressure in the negative pressure cup is restored to normal pressure. During the lifting process, the electrolyte in the negative pressure channel is prone to drop onto the liquid injection port of the battery, causing the liquid injection port to be contaminated by the electrolyte, which in turn can cause explosion welding, poor welding, and other problems during the welding process, seriously affecting the production efficiency of the battery.
[0039] To solve the above problems, after negative pressure formation, manual or automatic equipment wiping is usually used to clean the liquid injection port of the battery cell to eliminate the electrolyte dropped on the liquid injection port and prevent poor welding caused by electrolyte contamination. However, since the negative pressure formation is in a high temperature environment, the electrolyte dropped on the liquid injection port will quickly dry and harden in the high temperature environment, and manual wiping or automatic equipment wiping cannot achieve 100% cleaning, which in turn can cause explosion welding and poor welding during the welding process.
[0040] To this end, the negative pressure formation assembly provided by the application comprises a negative pressure cup, a negative pressure channel and a collection assembly, the negative pressure cup is provided with a negative pressure cavity, one end of the negative pressure channel is in communication with the negative pressure cavity; when the negative pressure formation of the battery cell ends, the other end of the negative pressure channel is configured to be separated from the liquid injection port of the battery cell, and the collection assembly is configured to collect the electrolyte dripping at the other end of the negative pressure channel, thereby avoiding the technical problem of electrolyte polluting the liquid injection port of the battery cell, and also avoiding the need for manual wiping at the liquid injection port, improving the production efficiency of the battery and reducing the production cost of the battery.
[0041] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 The negative pressure formation assembly provided by the embodiment of the application is a structural schematic diagram of the negative pressure formation of the battery cell 400; Figure 2 The negative pressure formation assembly provided by the embodiment of the application is a structural schematic diagram of the negative pressure formation assembly in a negative pressure formation state; Figure 3 The negative pressure formation assembly provided by the embodiment of the application is a structural schematic diagram of the negative pressure formation assembly after the negative pressure formation ends. Figure 4
[0042] As shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , the application provides a negative pressure formation assembly comprising:
[0043] The collection assembly 200;
[0044] The negative pressure cup 100 is provided with a negative pressure cavity 101 and a negative pressure channel 102, one end of the negative pressure channel 102 is in communication with the negative pressure cavity 101;
[0045] Among them, when the negative pressure formation of the battery cell 400 ends, the other end of the negative pressure channel 102 is configured to be separated from the liquid injection port 401 of the battery cell 400, and the collection assembly 200 is configured to collect the electrolyte 403 dripping at the other end of the negative pressure channel 102.
[0046] The negative pressure cup 100 is a device used in the formation process of lithium batteries, and its main function is to extract gas and part of the electrolyte 403 from the liquid injection hole of the battery through negative pressure vacuumization. The negative pressure cup 100 plays a key role in the formation process of lithium batteries, and through its design and function optimization, the performance of the battery can be effectively improved, the loss of electrolyte 403 can be reduced, and the production efficiency can be improved.
[0047] In the embodiment, the negative pressure cup 100 is provided with a negative pressure cavity 101 and a negative pressure channel 102. One end of the negative pressure channel 102 communicates with the negative pressure cavity 101, and the other end of the negative pressure channel 102 can communicate with the liquid injection port 401 of the battery cell 400 when the battery cell 400 is subjected to negative pressure formation, and can be separated from the liquid injection port 401 of the battery cell 400 after the battery cell 400 finishes negative pressure formation. Meanwhile, the collecting assembly 200 can collect the electrolyte 403 dripping at the other end of the negative pressure channel 102, which not only avoids the electrolyte 403 in the negative pressure channel 102 from dripping into the liquid injection port 401 of the battery cell 400 and causing pollution of the liquid injection port 401, but also collects the dripping electrolyte 403 for recycling, thereby reducing the production cost of the battery.
[0048] The application provides a negative pressure formation assembly, which comprises a negative pressure cup 100, a negative pressure channel 102 and a collecting assembly 200. The negative pressure cup 100 is provided with a negative pressure cavity 101, and one end of the negative pressure channel 102 communicates with the negative pressure cavity 101. When the battery cell 400 finishes negative pressure formation, the other end of the negative pressure channel 102 is configured to be separated from the liquid injection port 401 of the battery cell 400, and the collecting assembly 200 is configured to collect the electrolyte 403 dripping at the other end of the negative pressure channel 102, thereby avoiding the technical problem of pollution of the liquid injection port 401 of the battery cell 400 by the electrolyte 403, and also avoiding the need for manual wiping of the liquid injection port 401, thereby improving the production efficiency of the battery and reducing the production cost of the battery.
[0049] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the other end of the negative pressure channel 102 is also configured to be sealingly connected with the liquid injection port 401 to perform negative pressure formation on the battery cell 400.
[0050] In the embodiment, when it is necessary to perform negative pressure formation on the battery cell 400, the other end of the negative pressure channel 102 on the negative pressure cup 100 can be sealingly connected with the liquid injection port 401 of the battery cell 400, and the air pressure in the negative pressure cavity 101 can be controlled to be between-50 kpa and 80 kpa. Meanwhile, the battery cell 400 is placed in a high-temperature environment, and a small current is charged to the battery cell 400 to activate the active material on the positive current collector in the battery cell 400, and the small molecule gas generated by the reaction of the battery cell 400 is adsorbed into the negative pressure cup 100 through the negative pressure channel 102.
[0051] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 3 , the other end of the negative pressure channel 102 is sealingly connected with the liquid injection port 401 by a negative pressure nozzle to perform negative pressure formation on the battery cell 400.
[0052] Specifically, when the negative pressure formation of the battery cell 400 is needed, the other end of the negative pressure channel 102 on the negative pressure cup 100 can adopt a negative pressure nozzle to be connected with the liquid injection port 401 of the battery cell 400, so as to realize the communication between the negative pressure cavity 101 of the negative pressure cup 100 and the liquid injection port 401 of the battery cell 400, and to adsorb the small molecule gas generated by the reaction of the battery cell 400 into the negative pressure cup 100.
[0053] The negative pressure nozzle 300 can be made of a corrosion-resistant material, such as EPDM material, to improve the sealing effect and corrosion resistance. At the same time, the electrolyte 403 is easy to crystallize and adhere to the nozzle, causing the nozzle to be blocked, so the negative pressure nozzle needs to be replaced or cleaned regularly.
[0054] In some embodiments, as shown in Figs. 2A and 2B, the collection assembly 200 includes an elastic member 210 and a blocking member 220; one end of the elastic member 210 is connected with the negative pressure cup 100, and the other end of the elastic member 210 is connected with the blocking member 220; when the negative pressure formation of the battery cell 400 is completed, the elastic member 210 is changed from the tension state to the recovery deformation state, so as to move the blocking member 220 to the other end of the negative pressure channel 102 to collect the electrolyte 403. Figure 1 Figure 2 Figure 4 In some embodiments, as shown in Figs. 2A and 2B, the collection assembly 200 includes an elastic member 210 and a blocking member 220; one end of the elastic member 210 is connected with the negative pressure cup 100, and the other end of the elastic member 210 is connected with the blocking member 220; when the negative pressure formation of the battery cell 400 is completed, the elastic member 210 is changed from the tension state to the recovery deformation state, so as to move the blocking member 220 to the other end of the negative pressure channel 102 to collect the electrolyte 403.
[0055] In the present embodiment, when the battery cell 400 is subjected to the negative pressure formation, the elastic member 210 is configured to be in the tension state; when the negative pressure formation of the battery cell 400 is completed, the elastic member 210 is changed from the tension state to the recovery deformation state, so as to move the blocking member 220 to the other end of the negative pressure channel 102 to collect the electrolyte 403, which not only can avoid the electrolyte 403 in the negative pressure channel 102 from dropping to the liquid injection port 401 of the battery cell 400 to cause the pollution of the liquid injection port 401, but also can recycle the dropped electrolyte 403, thereby reducing the production cost of the battery.
[0056] In some embodiments, the blocking member 220 includes a blocking member 220 made of an electrolyte 403 corrosion-resistant material; or / and, the surface of the blocking member 220 is provided with a corrosion-resistant soft rubber.
[0057] Specifically, after the negative pressure formation of the battery cell 400 is completed, the electrolyte 403 in the negative pressure channel 102 of the negative pressure cup 100 will drop onto the blocking member 220, in order to avoid the corrosion of the blocking member 220 by the electrolyte 403, the blocking member 220 can be made of an electrolyte 403 corrosion-resistant material.
[0058] Meanwhile, the blocking piece 220 can be in contact with the battery cell 400 in the process of negative pressure formation, so a layer of anti-corrosion soft rubber can be wrapped on the surface of the blocking piece 220, which can not only further avoid the corrosion of the blocking piece 220 by the electrolyte 403, but also avoid the hard contact between the blocking piece 220 and the battery cell 400, so as to avoid the damage to the appearance of the battery cell 400.
[0059] In some embodiments, as shown in Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , when the battery cell 400 is subjected to negative pressure formation, the other end of the negative pressure channel 102 is arranged on the side of the blocking piece 220 away from the elastic piece 210; when the battery cell 400 ends the negative pressure formation, the other end of the negative pressure channel 102 is arranged on the side of the blocking piece 220 close to the elastic piece 210.
[0060] In the present embodiment, when the battery cell 400 is subjected to negative pressure formation, the other end of the negative pressure channel 102 can penetrate the blocking piece 220 to be in sealed connection with the liquid injection port 401 of the battery cell 400, so as to arrange the other end of the negative pressure channel 102 on the side of the blocking piece 220 away from the elastic piece 210, while the elastic piece 210 can be in a stretched state. Meanwhile, after the battery cell 400 ends the negative pressure formation, the negative pressure channel 102 is lifted and moves from the side of the blocking piece 220 away from the elastic piece 210 to the side of the blocking piece 220 close to the elastic piece 210, at this time, the electrolyte 403 in the negative pressure channel 102 can drop on the blocking piece 220 and be collected through the blocking piece 220, so as to avoid the technical problem that the electrolyte 403 pollutes the liquid injection port 401 of the battery cell 400, and also realize the recycling of the dropped electrolyte 403, thereby reducing the production cost of the battery.
[0061] It should be noted that the negative pressure channel 102 can be composed of a negative pressure pipe, which can be squeezed and bent to move to the side of the blocking piece 220 close to the elastic piece 210 during the lifting of the blocking piece 220, and meanwhile, the blocking piece 220 is inclined during the lifting, so as to make the electrolyte 403 dropped on the blocking piece 220 flow to the collection area of the blocking piece 220 for collection.
[0062] In some embodiments, as shown in Figure 1 、 Figure 2 and Figure 4 , the blocking piece 220 comprises a first baffle 221 and a second baffle 222; wherein the first baffle 221 is rotationally connected with the second baffle 222, and the first baffle 221 and the second baffle 222 are both connected with the elastic piece 210.
[0063] In the embodiment, the blocking piece 220 can be composed of the first baffle 221 and the second baffle 222, the first baffle 221 and the second baffle 222 can be rotationally connected, and the first baffle 221 and the second baffle 222 are connected with the elastic piece 210. When the battery cell 400 is subjected to negative pressure formation, the first baffle 221 can rotate clockwise, the second baffle 222 can rotate counterclockwise, the elastic piece 210 is in a stretched state, the other end of the negative pressure channel 102 can move to the side of the blocking piece 220 away from the elastic piece 210 at the connection between the first baffle 221 and the second baffle 222, and the negative pressure nozzle is sealed and connected with the liquid injection port 401 to form the battery cell 400. When the battery cell 400 ends the negative pressure formation, the first baffle 221 can rotate counterclockwise, the second baffle 222 can rotate clockwise, the other end of the negative pressure channel 102 can be squeezed to move to the side of the blocking piece 220 close to the elastic piece 210, and the electrolyte 403 in the negative pressure channel 102 can drop on the blocking piece 220 and be collected by the blocking piece 220, so that the technical problem of the electrolyte 403 polluting the liquid injection port 401 of the battery cell 400 can be avoided, the electrolyte 403 can be recycled, and the production cost of the battery can be reduced.
[0064] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 4 , when the battery cell 400 is subjected to negative pressure formation, the included angle between the first baffle 221 and the second baffle 222 towards the negative pressure cup 100 is greater than a preset threshold value; when the battery cell 400 ends the negative pressure formation, the included angle is less than the preset threshold value.
[0065] In the embodiment, when the battery cell 400 is subjected to negative pressure formation, the first baffle 221 can rotate clockwise, the second baffle 222 can rotate counterclockwise, so that the included angle between the first baffle 221 and the second baffle 222 towards the negative pressure cup 100 is greater than a preset threshold value, the other end of the negative pressure channel 102 can move to the side of the blocking piece 220 away from the elastic piece 210 at the connection between the first baffle 221 and the second baffle 222, and the negative pressure nozzle is sealed and connected with the liquid injection port 401 to form the battery cell 400. When the battery cell 400 ends the negative pressure formation, the first baffle 221 can rotate counterclockwise, the second baffle 222 can rotate clockwise, the other end of the negative pressure channel 102 can be squeezed to move to the side of the blocking piece 220 close to the elastic piece 210, and the electrolyte 403 in the negative pressure channel 102 can drop on the blocking piece 220 and be collected by the blocking piece 220. The preset threshold value can be 180 degrees.
[0066] It should be noted that the other end of the negative pressure channel 102 can be provided with a negative pressure tube. When the battery cell 400 is subjected to negative pressure formation, the negative pressure tube can be in a stretched state, at which time the other end of the negative pressure tube moves to the side of the blocking piece 220 away from the elastic piece 210; when the battery cell 400 ends the negative pressure formation, the negative pressure tube can recover from the stretched state to the original shape and move to the side of the blocking piece 220 close to the elastic piece 210, at which time the electrolyte 403 in the negative pressure channel 102 can drip from the negative pressure tube to the blocking piece 220 and be collected by the blocking piece 220.
[0067] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 4 , the elastic piece 210 includes a first spring 211 and a second spring 212; wherein one end of the first spring 211 and one end of the second spring 212 are connected with the bottom of the negative pressure cup 100, the other end of the first spring 211 is connected with the first baffle 221, and the other end of the second spring 212 is connected with the second baffle 222.
[0068] In this embodiment, the first baffle 221 and the second baffle 222 can each be fixed to the bottom of the negative pressure cup 100 by a spring, i.e. one end of the first spring 211 and one end of the second spring 212 are connected with the bottom of the negative pressure cup 100, the other end of the first spring 211 is connected with the first baffle 221, and the other end of the second spring 212 is connected with the second baffle 222.
[0069] In some embodiments, as shown in Figure 1 , Figure 2 and Figure 4 , the collecting assembly 200 further includes at least one collecting pipeline 230; wherein one end of the collecting pipeline 230 is in communication with the side of the blocking piece 220 close to the negative pressure cup 100.
[0070] In this embodiment, the collecting assembly 200 includes two collecting pipelines 230, one of which can be arranged on the side of the first baffle 221 away from the second baffle 222, and the other of which can be arranged on the side of the second baffle 222 away from the first baffle 221, thereby achieving sufficient collection of the dripping electrolyte 403 and avoiding leakage of the electrolyte 403, and the collecting pipeline 230 can concentrate the collection of the electrolyte 403 to facilitate recycling of the electrolyte 403.
[0071] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A negative pressure formation component, characterized in that, include: Collect components; A negative pressure cup is provided with a negative pressure chamber and a negative pressure channel, one end of the negative pressure channel being connected to the negative pressure chamber; When the cell completes negative pressure formation, the other end of the negative pressure channel is configured to be separated from the electrolyte injection port of the cell, and the collection component is configured to collect the electrolyte dripping from the other end of the negative pressure channel.
2. The negative pressure formation component according to claim 1, characterized in that, The other end of the negative pressure channel is also configured to be sealed and connected to the liquid injection port to perform negative pressure formation on the battery cell.
3. The negative pressure formation component according to claim 2, characterized in that, The other end of the negative pressure channel is sealed to the liquid injection port with a negative pressure nozzle to perform negative pressure formation on the battery cell.
4. The negative pressure formation component according to claim 2, characterized in that, The collection component includes an elastic element and a blocking element; One end of the elastic element is connected to the negative pressure cup, and the other end of the elastic element is connected to the blocking element; When the cell finishes negative pressure formation, the elastic element changes from a stretched state to a restoring deformation state, so as to move the blocking element to the other end of the negative pressure channel for electrolyte collection.
5. The negative pressure formation component according to claim 4, characterized in that, The blocking element includes a blocking element made of an electrolyte-resistant material; or / and, The surface of the blocking component is covered with anti-corrosion soft rubber.
6. The negative pressure formation component according to claim 4, characterized in that, When the battery cell undergoes negative pressure formation, the other end of the negative pressure channel is located on the side of the blocking member away from the elastic member; when the battery cell finishes negative pressure formation, the other end of the negative pressure channel is located on the side of the blocking member closer to the elastic member.
7. The negative pressure formation component according to claim 4, characterized in that, The blocking element includes a first baffle and a second baffle; The first baffle and the second baffle are rotatably connected, and both the first baffle and the second baffle are connected to the elastic element.
8. The negative pressure formation component according to claim 7, characterized in that, When the battery cell undergoes negative pressure formation, the angle between the first baffle and the second baffle toward the negative pressure cup is greater than a preset threshold; when the battery cell finishes negative pressure formation, the angle is less than the preset threshold.
9. The negative pressure formation component according to claim 7, characterized in that, The elastic element includes a first spring and a second spring; One end of the first spring and one end of the second spring are both connected to the bottom of the negative pressure cup, the other end of the first spring is connected to the first baffle, and the other end of the second spring is connected to the second baffle.
10. The negative pressure formation component according to any one of claims 4-9, characterized in that, The collection component also includes at least one collection pipe; One end of the collection pipe is connected to the side of the blocking member near the negative pressure cup.