Battery liquid injection device
The battery electrolyte filling device, which uses a vacuum chamber and lifting drive assembly, solves the problem of air bubbles in the electrolyte inside the battery casing by utilizing vacuum pumping and negative pressure filling technology, achieving uniform distribution of the electrolyte and improving battery performance.
Patent Information
- Application Number
- CN202423111002.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-17
AI Technical Summary
During the battery electrolyte filling process, the electrolyte is prone to generating bubbles or failing to fully wet the battery, which affects battery performance.
The battery electrolyte filling device, which employs a vacuum chamber and lifting drive components, reduces the generation of air bubbles and ensures uniform distribution of electrolyte by using vacuum extraction and negative pressure filling.
This improves the wetting degree of the electrolyte inside the battery casing, thus enhancing battery performance.
Smart Images
Figure CN223651618U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery electrolyte injection device. Background Technology
[0002] Cylindrical batteries are currently the highest energy density batteries among chemical power sources. They have advantages such as high operating voltage, long storage life, wide operating temperature range, convenient use and maintenance, and strong adaptability. In the past ten years or so, they have been widely used in the national economy, represented by the defense sector.
[0003] In the production process of cylindrical batteries, an important step is to inject electrolyte into the battery casing. During the injection process, due to liquid fluctuations, air bubbles may easily appear in the electrolyte or the electrolyte may not be able to completely wet the battery casing, affecting the final battery performance.
[0004] Therefore, there is an urgent need to design a battery liquid injection device to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a battery electrolyte injection device that can reduce the generation of air bubbles during the electrolyte injection process and improve the degree of electrolyte wetting inside the battery casing.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Battery electrolyte filling device, comprising:
[0008] A vacuum chamber, which forms a accommodating cavity that can be evacuated to a vacuum state;
[0009] The liquid injection mechanism is placed inside the vacuum chamber. The liquid injection mechanism includes a frame, an electrolyte chamber, a lifting drive assembly, and a fixture. The electrolyte chamber is installed on the top of the frame. The fixture is used to accommodate the battery case and is located below the electrolyte chamber. The fixture is connected to the output end of the lifting drive assembly, which can drive the fixture to move up and down.
[0010] As an optional solution, the above-mentioned lifting drive component includes:
[0011] The lifting handle is connected to the bottom of the aforementioned fixture;
[0012] The guide component is connected to the aforementioned fixture, and the guide component slides in a vertical direction with the aforementioned frame.
[0013] As an optional solution, the above-mentioned fixture includes:
[0014] The first vertical part extends along the vertical direction and passes through the guide member. The lifting handle is connected to the first vertical part and is located below the guide member.
[0015] A support portion is connected to the top of the first vertical portion, and the cross-sectional area of the support portion is larger than the cross-sectional area of the first vertical portion;
[0016] The battery liquid injection device also includes an elastic element, the two ends of which are connected to or abut against the bearing portion and the guide portion, respectively.
[0017] As an alternative, the aforementioned elastic element is arranged around the outer periphery of the aforementioned first vertical portion.
[0018] As an optional solution, the aforementioned guide component includes:
[0019] The connecting part is connected to the aforementioned fixture and extends along the first direction;
[0020] Two guide parts are respectively connected to the two ends of the connecting part in the first direction. The frame has sliding grooves along the vertical direction at both ends of the first direction. The two guide parts slide in cooperation with the corresponding sliding grooves. The first direction is perpendicular to the vertical direction.
[0021] As an alternative, in the second direction, the size of the connecting part is larger than the size of the guide part, the slide groove is through the first direction, the guide part also includes a first limiting part, the first limiting part is corresponding to the guide part and is detachably connected to the end of the corresponding guide part away from the connecting part, the size of the guide part in the first direction is adapted to the wall thickness of the frame sidewall, the size of the first limiting part in the second direction is larger than the size of the slide groove in the second direction, and the second direction is perpendicular to the first direction and the vertical direction respectively.
[0022] As an optional solution, the aforementioned framework includes:
[0023] Base plate;
[0024] Two side plates are spaced apart at both ends of the base plate along the first direction, and each side plate has a corresponding groove with an opening at the top.
[0025] The top plate is detachably connected to the top of the two side plates, and the electrolyte tank is installed on the top plate.
[0026] As an optional solution, the aforementioned battery electrolyte filling device further includes a limiting member, which includes:
[0027] The second vertical part extends along the aforementioned vertical direction, and the lower end of the second vertical part is connected to the aforementioned frame and passes through the aforementioned guide member;
[0028] The second limiting part is connected to the upper end of the second vertical part to restrict the movement of the guide member in the vertical direction.
[0029] As an optional solution, the aforementioned limiting component is a bolt.
[0030] As an alternative, at least two electrolyte tanks are spaced apart in the first direction, and the lifting drive assembly and the fixture are arranged in a one-to-one correspondence with the electrolyte tanks.
[0031] The beneficial effects of this utility model are as follows:
[0032] This invention provides a battery electrolyte injection device. By employing a vacuum chamber, before injection, a lifting drive assembly lowers a fixture to a certain height, mounts the battery casing onto the fixture, evacuates the vacuum chamber, and then the lifting drive assembly raises the fixture along with the battery casing. An injection needle at the bottom of the electrolyte chamber blocks the injection hole at the top of the battery casing. The vacuum environment inside the vacuum chamber is then released. At this point, the battery casing is under vacuum due to the blockage, the injection needle opens, and the electrolyte in the chamber is automatically injected into the battery casing under atmospheric pressure. After injection, the lifting drive assembly lowers the fixture to remove the battery casing. During this process, the vacuum environment inside the battery casing reduces air bubbles, and the negative pressure draws the electrolyte into the battery casing, ensuring uniform electrolyte distribution and improving the wetting degree of the electrolyte within the battery casing, thereby improving the performance of the finished battery. Attached Figure Description
[0033] Figure 1 This is a schematic diagram of the battery electrolyte filling device provided in this embodiment of the utility model;
[0034] Figure 2 This is a structural schematic diagram of the guide member and two side plates provided in an embodiment of this utility model.
[0035] In the picture:
[0036] 10. Frame; 11. Base plate; 12. Side plates; 121. Slide groove; 13. Top plate;
[0037] 21. Electrolyte tank; 22. Injection needle;
[0038] 30. Lifting drive assembly; 31. Lifting handle;
[0039] 32. Guide component; 321. Guide section; 322. Connecting section; 323. First limiting section;
[0040] 40. Fixture; 41. First vertical part; 42. Supporting part;
[0041] 50. Elastic element; 60. Limiting element; 61. Second vertical part; 62. Second limiting part;
[0042] 200. Battery casing; Detailed Implementation
[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0044] 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.
[0045] 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.
[0046] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0047] This embodiment provides a battery electrolyte injection device that can avoid the generation of air bubbles during the electrolyte injection process and improve the wetting degree of the electrolyte within the battery casing 200. For example... Figure 1As shown, the battery electrolyte filling device includes a vacuum chamber (not shown) and an electrolyte filling mechanism. A receiving cavity is formed inside the vacuum chamber, which can be evacuated to a vacuum state. The electrolyte filling mechanism is placed inside the vacuum chamber and includes a frame 10, an electrolyte tank 21, a lifting drive assembly 30, and a fixture 40. The electrolyte tank 21 is installed on the top of the frame 10. The fixture 40 is used to receive the battery case 200 and is located below the electrolyte tank 21. The fixture 40 is connected to the output end of the lifting drive assembly 30, which can drive the fixture 40 to move up and down.
[0048] The aforementioned battery electrolyte injection device employs a vacuum chamber. Before injection, the lifting drive assembly 30 lowers the fixture 40 to a certain height, placing the battery casing 200 onto the fixture 40. The vacuum chamber is then evacuated, and the lifting drive assembly 30 drives the fixture 40, raising the battery casing 200 along with it. The injection needle 22 at the bottom of the electrolyte chamber 21 blocks the injection hole (not shown) at the top of the battery casing 200. The vacuum environment inside the vacuum chamber is then released. At this point, the battery casing 200 is under vacuum due to the blockage, allowing for electrolyte injection. When the syringe 22 is opened, the liquid in the electrolyte chamber 21 is automatically injected into the battery casing 200 under atmospheric pressure. After the injection is completed, the lifting drive assembly 30 drives the fixture 40 to descend and remove the battery casing 200 from the fixture 40. During this process, due to the vacuum environment inside the battery casing 200, the number of air bubbles is reduced during the injection process. At the same time, due to the negative pressure, the electrolyte is drawn into the battery casing, ensuring that the electrolyte is evenly distributed and improving the degree of electrolyte wetting inside the battery casing 200, thereby improving the performance of the finished battery.
[0049] It should be noted that the structure of the vacuum chamber is similar to that of a glove box, allowing operation of the internal parts from the outside while ensuring a vacuum environment inside. Its structure and the principle of achieving vacuum will not be elaborated here.
[0050] The opening and closing of the injection needle 22 can be operated from the outside through the gloves in the glove box, which will not be described in detail here.
[0051] In an optional embodiment, such as Figure 1 As shown, the lifting drive assembly 30 includes a lifting handle 31 and a guide member 32. The lifting handle 31 is connected to the bottom of the fixture 40; the guide member 32 is connected to the fixture 40 and slides with the frame 10 in the vertical direction (Z direction in the figure). That is to say, in this embodiment, the lifting handle 31 is manually driven to move the fixture 40 up and down, and the guide member 32 ensures that the fixture 40 moves in the vertical direction.
[0052] In another alternative embodiment, the lifting drive assembly 30 may also be a linear motor or other drive element, which is not limited here.
[0053] Optionally, such as Figure 1As shown, the fixture 40 includes a first vertical part 41 and a supporting part 42. The first vertical part 41 extends vertically and is provided with a guide member 32. The lifting handle 31 is connected to the first vertical part 41 and is located on the lower side of the guide member 32. The supporting part 42 is connected to the top of the first vertical part 41, and the cross-sectional area of the supporting part 42 is larger than the cross-sectional area of the first vertical part 41. The battery liquid injection device also includes an elastic member 50, and the two ends of the elastic member 50 are connected to or abut against the supporting part 42 and the guide member 32, respectively. With the above configuration, the two ends of the elastic element 50 limit the bottom of the bearing part 42 and the guide element 32 respectively. When it is necessary to remove the battery case 200, press the lifting handle 31, the fixture 40 descends, removes the battery case 200 filled with electrolyte, and installs the empty battery case 200. When the lifting handle 31 is released, the fixture 40 automatically rises and resets under the action of the elastic force of the elastic element 50, and the injection needle 22 is inserted into the injection hole on the battery case 200. This makes the rise of the fixture 40 independent of manual operation. At the same time, when the lifting handle 31 descends, the fixture 40 will not directly hit the guide element 32, which plays a buffering role in the descent of the battery case 200.
[0054] Optionally, the elastic element 50 is disposed around the outer periphery of the first vertical portion 41. This arrangement can prevent the elastic element 50 from deforming.
[0055] It is understood that, in this embodiment, see Figure 1 and Figure 2 The guide member 32 has a through hole for the first vertical part 41 to pass through. The guide member 32 and the first vertical part 41 slide in the vertical direction to realize the compression and automatic reset of the elastic member 50 when the lifting handle 31 is pressed down.
[0056] In other embodiments, the elastic element 50 is not provided between the guide member 32 and the bearing part 42. The guide member 32 can move synchronously with the fixture 40, while the elastic element 50 is provided between the frame 10 and the guide member 32, which can also play a role in buffering and automatic reset, and is not limited here. The structure in this embodiment is more compact and has fewer parts.
[0057] Optionally, such as Figure 1 and Figure 2As shown, the guide member 32 includes a connecting portion 322 and two guide portions 321. The connecting portion 322 is connected to the fixture 40 and extends along a first direction. Specifically, a first vertical portion 41 passes through the connecting portion 322 and slides in a vertical engagement with the connecting portion 322. The two guide portions 321 are respectively connected to the two ends of the connecting portion 322 in the first direction (X direction in the figure, which is perpendicular to the Z direction). The frame 10 has vertically oriented grooves 121 at both ends of the first direction, and the two guide portions 321 slide in a corresponding groove 121. The sliding engagement between the guide member 32 and the frame 10 in the vertical direction is achieved by the sliding of the guide portions 321 within the grooves 121.
[0058] Optionally, in the second direction (Y direction in the figure, which is perpendicular to both the X and Z directions), the size of the connecting part 322 is larger than the size of the guide part 321, the slide groove 121 is provided through in the first direction, and the guide member 32 also includes a first limiting part 323. The first limiting part 323 is provided in a one-to-one correspondence with the guide part 321 and is detachably connected to the end of the corresponding guide part 321 away from the connecting part 322. The size of the guide part 321 in the first direction is adapted to the wall thickness of the side wall of the frame 10, and the size of the first limiting part 323 in the second direction is larger than the size of the slide groove 121 in the second direction. With the above configuration, the guide part 321 slides in the groove 121 to ensure that the guide member 32 moves in the vertical direction. At the same time, in the first direction, the size of the connecting part 322 and the size of the frame 10 are adapted to each other in the first direction, so that the two ends of the connecting part 322 are respectively limited by the two sides of the frame 10, preventing the guide member 32 from shifting in the horizontal direction. The first limiting part 323 and the connecting part 322 are equivalent to forming a groove, which is consistent with the wall thickness of the side plate 12.
[0059] Specifically, see Figure 1 and Figure 2 The frame 10 includes a base plate 11 and two side plates 12. The two side plates 12 are spaced apart at both ends of the base plate 11 along a first direction. Each side plate 12 has a corresponding groove 121 with an opening at the top. In other words, the spacing between the two side plates 12 is adapted to the size of the connecting part 322 in the first direction.
[0060] In other embodiments, the groove 121 of the side plate 12 may not be through in the first direction, such as a T-groove, etc., which is not limited here.
[0061] When installing the guide 32, simply insert it downwards from the top of the side plate 12.
[0062] Optionally, the frame 10 also includes a top plate 13, which is connected to the top of the two side plates 12, and the electrolyte tank 21 is installed on the top plate 13. Thus, the electrolyte tank 21 can be installed with the top plate 13 in other locations first, and then uniformly installed on the top of the two side plates 12, which facilitates the installation of the electrolyte tank 21.
[0063] In this embodiment, as Figure 1 As shown, the battery filling device also includes a limiting member 60, which includes a second vertical portion 61 and a second limiting portion 62. The second vertical portion 61 extends vertically, and its lower end is connected to the frame 10 and through which a guide member 32 passes. The second limiting portion 62 is connected to the upper end of the second vertical portion 61 to restrict the movement of the guide member 32 in the vertical direction. With the above configuration, when the lifting handle 31 is subjected to external force upwards in an unexpected situation, it prevents the battery casing 200 from getting too close to the filling needle tube 22, thus preventing damage to both.
[0064] Optionally, since the slide groove 121 is through-type in the first direction, the limiting member 60 is connected to the bottom of the slide groove 121, which does not occupy additional space. In other embodiments, the limiting member 60 can also be connected to the base plate 11, which is not limited here. In addition, the bottom of the slide groove 121 also limits the position of the guide member 32 in the vertical direction. When the lifting handle 31 is pressed, the guide member 32 is limited and kept still by the bottom of the slide groove 121, and only the fixture 40 moves downward.
[0065] Optionally, the limiting component 60 can be a bolt. Bolts are standard parts, relatively easy to procure, and inexpensive.
[0066] Optionally, at least two electrolyte chambers 21 are spaced apart in the first direction, and the lifting drive assembly 30 and the fixture 40 are correspondingly arranged one-to-one with the electrolyte chambers 21. This arrangement allows for the simultaneous injection of electrolyte into multiple battery casings 200, improving injection efficiency. In this embodiment, four electrolyte chambers 21 are provided. In other embodiments, the number of electrolyte chambers 21 can be flexibly set according to space or requirements, and is not limited here.
[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A battery electrolyte filling device, characterized in that, include: A vacuum chamber, which forms a accommodating cavity that can be evacuated to a vacuum state; The liquid injection mechanism is placed inside the vacuum chamber. The liquid injection mechanism includes a frame (10), an electrolyte chamber (21), a lifting drive assembly (30), and a fixture (40). The electrolyte chamber (21) is installed on the top of the frame (10). The fixture (40) is used to accommodate the battery case (200) and is located below the electrolyte chamber (21). The fixture (40) is connected to the output end of the lifting drive assembly (30). The lifting drive assembly (30) can drive the fixture (40) to move up and down.
2. The battery electrolyte injection device according to claim 1, characterized in that, The lifting drive assembly (30) includes: A lifting handle (31) is connected to the bottom of the fixture (40); The guide (32) is connected to the fixture (40), and the guide (32) slides in the vertical direction with the frame (10).
3. The battery electrolyte injection device according to claim 2, characterized in that, The fixture (40) includes: The first vertical part (41) extends along the vertical direction and passes through the guide (32), and the lifting handle (31) is connected to the first vertical part (41) and located on the lower side of the guide (32); The supporting part (42) is connected to the top of the first vertical part (41), and the cross-sectional area of the supporting part (42) is larger than the cross-sectional area of the first vertical part (41). The battery injection device also includes an elastic element (50), the two ends of which are connected to or abut against the bearing part (42) and the guide part (32), respectively.
4. The battery electrolyte injection device according to claim 3, characterized in that, The elastic element (50) is disposed around the outer periphery of the first vertical part (41).
5. The battery electrolyte injection device according to claim 2, characterized in that, The guide (32) includes: The connecting part (322) is connected to the fixture (40) and extends along the first direction; Two guide portions (321) are respectively connected to the two ends of the connecting portion (322) in the first direction. The frame (10) has a sliding groove (121) along the vertical direction at both ends of the first direction. The two guide portions (321) slide in cooperation with the corresponding sliding groove (121). The first direction is perpendicular to the vertical direction.
6. The battery electrolyte injection device according to claim 5, characterized in that, In the second direction, the size of the connecting part (322) is larger than the size of the guide part (321). The slide groove (121) is through in the first direction. The guide (32) also includes a first limiting part (323). The first limiting part (323) is correspondingly provided with the guide part (321) and is detachably connected to the end of the corresponding guide part (321) away from the connecting part (322). The size of the guide part (321) in the first direction is adapted to the wall thickness of the side wall of the frame (10). The size of the first limiting part (323) in the second direction is larger than the size of the slide groove (121) in the second direction. The second direction is perpendicular to the first direction and the vertical direction, respectively.
7. The battery electrolyte injection device according to claim 5, characterized in that, The frame (10) includes: Base plate (11); Two side plates (12) are spaced apart at both ends of the base plate (11) along the first direction, and each side plate (12) is provided with a corresponding groove (121), with the top of the groove (121) being open; The top plate (13) is detachably connected to the top of the two side plates (12), and the electrolyte tank (21) is installed on the top plate (13).
8. The battery electrolyte filling device according to any one of claims 2-7, characterized in that, The battery filling device further includes a limiting member (60), the limiting member (60) comprising: The second vertical part (61) extends along the vertical direction, and the lower end of the second vertical part (61) is connected to the frame (10) and passes through the guide (32); The second limiting part (62) is connected to the upper end of the second vertical part (61) to restrict the movement of the guide (32) in the vertical direction.
9. The battery electrolyte filling device according to claim 8, characterized in that, The limiting component (60) is a bolt.
10. The battery electrolyte filling device according to any one of claims 1-7, characterized in that, At least two electrolyte tanks (21) are spaced apart in the first direction, and the lifting drive assembly (30) and the fixture (40) are arranged in a one-to-one correspondence with the electrolyte tanks (21).