Single battery and electric equipment
By setting a drainage section and a drainage slope inside the injection hole, the electrolyte is guided by gravity, which solves the problem of electrolyte residue and achieves electrolyte saving and improved manufacturing efficiency.
Patent Information
- Application Number
- CN202520153521.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-22
AI Technical Summary
During the electrolyte filling process of a single battery cell, electrolyte residue remains on the wall of the filling hole, affecting the sealing performance, resulting in electrolyte waste and increased labor costs.
A drainage section is provided inside the injection hole, and a drainage slope is provided on the drainage section. The residual liquid is guided through the injection hole by the gravity of the electrolyte itself, thereby reducing the amount of residue. The injection hole is then sealed by a sealing body.
It effectively reduces electrolyte residue, lowers labor costs, improves manufacturing efficiency, and ensures sealing.
Smart Images
Figure CN223871677U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, specifically to a single-cell battery and an electrical device. Background Technology
[0002] During the manufacturing and use of a single battery cell, electrolyte needs to be injected into the cell to extend its energy storage capacity and cycle life. During the injection of electrolyte into the cell through the injection port, electrolyte residue may remain on the wall of the injection port. This residue can affect the sealing performance of the subsequent assembly between the sealant and the injection port. In related technologies, before assembling the sealant, it is usually necessary to manually wipe away the residual electrolyte from the wall of the injection port. This not only wastes electrolyte but also increases labor costs. Utility Model Content
[0003] To address the aforementioned technical problems, embodiments of this application provide a single-cell battery and an electrical device that can reduce the amount of electrolyte residue on the wall of the injection hole, reduce electrolyte waste, and lower labor costs.
[0004] In a first aspect, a single-cell battery is provided, comprising:
[0005] Battery cell;
[0006] The outer casing is used to house the battery cell; the outer casing is provided with a liquid injection hole, the liquid injection hole is provided with a drainage part protruding inside, the drainage part is provided with a drainage slope, and the drainage slope is used to guide the liquid on the drainage slope through the liquid injection hole;
[0007] A sealing body is disposed inside the injection hole, and the sealing body cooperates with the drainage part.
[0008] According to a first aspect of this application, the drainage portion extends spirally around the axis of the injection hole, the spiral surface of the drainage portion forms the drainage slope, and the inner side of the drainage portion forms an injection channel;
[0009] One portion of the sealing body abuts against the drainage slope, and another portion of the sealing body cooperates with the injection channel to seal the injection channel.
[0010] According to a first aspect of this application, the spiral angle of the drainage portion is A, wherein A satisfies: 30°≤A≤70°.
[0011] According to a first aspect of this application, the sealing body comprises:
[0012] The first sealing part cooperates with the injection channel to seal the injection channel;
[0013] The second sealing part extends spirally around the outer side of the first sealing part, and the second sealing part abuts against the drainage slope.
[0014] According to a first aspect of this application, the helix angle of the second sealing part is B, wherein B satisfies: 30°≤B≤70°.
[0015] According to a first aspect of this application, the helix angle of the drainage portion is equal to the helix angle of the second sealing portion.
[0016] According to a first aspect of this application, the single-cell battery further includes:
[0017] A sealing pin is disposed inside the injection hole, located on the side of the sealing body away from the battery cell, and the sealing pin is welded to the inner wall of the injection hole.
[0018] According to a first aspect of this application, the injection hole includes a conical section, the sealing pin is a cone, and the sealing pin mates with the conical section.
[0019] According to a first aspect of this application, the surface of the sealing body has an uneven, rough structure.
[0020] Secondly, an electrical appliance is also provided, including:
[0021] The single-cell battery as described in the previous embodiment.
[0022] The single-cell battery and electrical device provided in this application embodiment have a protruding guide portion inside the injection hole and a guide slope on the guide portion. This allows the guide slope to guide residual electrolyte through the injection hole, effectively reducing the amount of residual electrolyte and reducing electrolyte waste. Furthermore, during the process of the guide slope guiding the electrolyte through the injection hole, only the gravity of the electrolyte itself is needed, without the need for manual wiping. This not only reduces labor costs but also reduces wiping processes, thereby improving the overall efficiency of manufacturing single-cell batteries. Attached Figure Description
[0023] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.
[0024] Figure 1 A cross-sectional view of the top cover provided for an exemplary embodiment of this application.
[0025] Figure 2 This is a schematic diagram of the structure of the top cover provided for an exemplary embodiment of this application.
[0026] Figure 3 for Figure 2 Enlarged diagram of point C in the middle.
[0027] Figure 4 This is a schematic diagram of the structure of a sealing body provided for an exemplary embodiment of this application.
[0028] Figure 5 This is a schematic diagram of the structure of a sealing nail provided for an exemplary embodiment of this application.
[0029] Reference numerals: 110-Top cover; 111-Injection hole; 112-Drainage section; 113-Drainage slope; 114-Injection channel; 115-Conical section; 120-Sealing body; 121-First sealing part; 122-Second sealing part; 130-Sealing pin. Detailed Implementation
[0030] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.
[0031] The single-cell battery provided in this application embodiment may include a battery cell and a casing. The casing can be used to house the battery cell and serves to limit and protect the battery cell. The casing is provided with a liquid injection hole 111 (e.g., Figure 1 and Figure 3 As shown in the figure, in practical applications, electrolyte can be injected into the cell through the injection hole 111 to extend the cell's energy storage capacity and cycle life.
[0032] Figure 1 This is a schematic diagram of the structure of a top cover provided for an exemplary embodiment of this application. Figure 1 As shown, the housing may include a housing and a top cover 110. The housing has an opening through which the battery cell can be assembled. The top cover 110 is placed on top of the housing to close the opening.
[0033] In practical applications, the aforementioned injection hole 111 can be located on the side wall of the housing, or it can be located on the top cover 110. Combined with... Figure 1 This application describes an embodiment where the injection hole 111 is located on the top cover 110.
[0034] Figure 2 This is a schematic diagram of the structure of the top cover provided for an exemplary embodiment of this application. Figure 3 for Figure 2 An enlarged view of point C in the middle. (See diagram below.) Figure 2 and Figure 3As shown, the injection hole 111 has a protruding drainage section 112, and the drainage section 112 has a drainage slope 113. In practical applications, during the process of injecting electrolyte into the battery cell through the injection hole 111, some electrolyte will remain on the drainage section 112. The drainage slope 113 can guide the remaining electrolyte through the injection hole 111, thereby effectively reducing the amount of electrolyte residue and reducing electrolyte waste.
[0035] It should be understood that, since the electrolyte remaining on the guide slope 113 will automatically flow along the guide direction of the guide slope 113 through the injection hole 111 and then into the cell under the action of gravity, the electrolyte remaining on the guide slope 113 does not need to be wiped manually by the staff, which effectively reduces labor costs, reduces wiping processes, and can also improve the overall efficiency of manufacturing single cells.
[0036] In one embodiment, the drainage slope 113 may include an inclined plane, an inclined curved surface, a spiral curved surface, etc.
[0037] Figure 4 This is a schematic diagram of the structure of a sealing body provided for an exemplary embodiment of this application. Figures 1 to 4 As shown, the single cell may also include a sealing body 120, which is disposed inside the liquid injection hole 111. The sealing body 120 cooperates with the drainage part 112, and the sealing body 120 can seal the liquid injection hole 111.
[0038] Specifically, after the liquid injection operation is completed, the sealing body 120 can be installed inside the liquid injection hole 111 to seal the liquid injection hole 111. On the one hand, it can prevent external foreign objects from entering the cell through the liquid injection hole 111, and on the other hand, it can prevent the electrolyte in the cell from leaking through the liquid injection hole 111.
[0039] In one embodiment, the entire sealing body 120 is disposed within the injection hole 111, which can effectively reduce the probability of the sealing body 120 detaching from the injection hole 111 and ensure the sealing effect.
[0040] The single-cell battery provided in this application embodiment has a protruding guide portion 112 inside the injection hole 111 and a guide slope 113 on the guide portion 112. The guide slope 113 can guide the residual electrolyte through the injection hole 111, effectively reducing the amount of residual electrolyte and reducing electrolyte waste. Furthermore, in the process of the guide slope 113 guiding the electrolyte through the injection hole 111, only the gravity of the electrolyte itself is needed, and manual wiping is not required. This not only reduces labor costs but also reduces wiping processes and improves the overall efficiency of manufacturing single-cell batteries.
[0041] It should be noted that the surface of the sealing body 120 can be provided with an uneven, rough structure. This rough structure helps the sealing body 120 achieve its throttling and sealing functions. Specifically, the recessed portion can buffer and reduce the flow rate of electrolyte vapor generated within the battery cell, reducing the impact of electrolyte vapor on the sealing body 120, extending its service life, and allowing it to better maintain a sealed state. Additionally, the recessed portion can increase the electrolyte's penetration path, reduce its penetration rate, thereby increasing the difficulty of electrolyte penetration and improving penetration problems caused by capillary action. The protruding portion can abut against the inner wall of the injection hole 111, enhancing the sealing performance of the sealing body 120.
[0042] In one embodiment, the rough structure can be formed by providing a plurality of protrusions on the surface of the seal 120.
[0043] In one embodiment, the rough structure can be formed by providing a plurality of grooves on the surface of the sealing body 120.
[0044] In one embodiment, the rough structure can be formed by increasing the surface roughness of the seal 120.
[0045] like Figure 3 As shown, the drainage section 112 extends spirally around the axis of the injection hole 111, and the spiral surface of the drainage section 112 can form the aforementioned drainage slope 113, and the inner side of the drainage section 112 forms an injection channel 114.
[0046] It should be understood that, considering the small inner diameter of the injection hole 111, the use of a spiral drainage slope 113 is more suitable for the injection hole 111 with its limited radial space. The spiral drainage slope 113 can achieve a longer drainage path within the small radial space of the injection hole 111, achieving an ideal drainage effect. In addition, the spiral drainage slope 113 has no dead zones, meaning that the electrolyte remaining on the drainage slope 113 can pass smoothly and eventually enter the battery cell, further reducing the amount of electrolyte residue on the drainage slope 113.
[0047] It should be noted that, compared to the scheme of setting a directly inclined slope as a drainage slope 113 in the injection hole 111, the spiral drainage slope 113 can reserve the middle area of the injection hole 111 as the aforementioned injection channel 114. In this way, during the injection process, the electrolyte will preferentially enter the cell through the injection channel 114, and the injection channel 114 can effectively ensure the overall injection efficiency.
[0048] like Figures 1 to 3As shown, during the assembly of the sealing body 120, one part of the sealing body 120 abuts against the drainage slope 113, and another part of the sealing body 120 cooperates with the injection channel 114. Thus, firstly, the drainage slope 113 abuts against the sealing body 120, providing support and limiting for the sealing body 120, improving the assembly stability of the sealing body 120 within the injection hole 111; secondly, the sealing body 120 seals the injection channel 114, preventing external foreign objects from entering the battery cell and preventing electrolyte leakage from the injection channel 114; thirdly, the cooperation between the sealing body 120 and the injection channel 114 allows the inner wall of the injection channel 114 to limit the sealing body 120, further preventing the sealing body 120 from detaching from the injection hole 111, effectively improving the assembly stability and sealing performance of the sealing body 120.
[0049] like Figure 4 As shown, the sealing body 120 may include a first sealing part 121 and a second sealing part 122. The first sealing part 121 cooperates with the injection channel 114 to seal the injection channel 114 as described above. The second sealing part 122 extends spirally around the outside of the first sealing part 121 and abuts against the drainage slope 113.
[0050] It should be understood that the second sealing part 122 of the spiral can be adapted to the flow-guiding slope 113 of the spiral, so that the second sealing part 122 and the flow-guiding slope 113 are less likely to have gaps after contact, thereby improving the sealing effect between the second sealing part 122 and the flow-guiding slope 113. In addition, the flow-guiding slope 113 can support the second sealing part 122, thereby preventing the sealing body 120 from falling into the battery cell.
[0051] It should be noted that, considering the viscosity of conventional electrolyte is 1.9 mPa·s, if the helix angle A of the drainage section 112 is too small, the electrolyte will easily adhere to the drainage slope 113, resulting in the drainage slope 113 failing to achieve the desired drainage effect. Furthermore, if the helix angle A is too small, the flow rate of the electrolyte on the drainage slope 113 will be slow, affecting the overall injection efficiency. If the helix angle A of the drainage section 112 is too large, the electrolyte will easily splash when passing through the drainage slope 113 during the injection process, resulting in electrolyte waste.
[0052] Therefore, the embodiments of this application limit the range of the helix angle A of the drainage section 112. For example, the helix angle A satisfies 30°≤A≤70°. This ensures that the electrolyte can flow smoothly on the drainage slope 113 at a normal rate, and also improves the problem of electrolyte splashing when passing through the drainage slope 113.
[0053] In one embodiment, the helix angle A can be selected as 30°, 50°, 70°, etc.
[0054] Correspondingly, the helix angle of the second sealing part 122 is B, which satisfies the following condition: 30°≤B≤70°. This allows the helix angle of the second sealing part 122 to be more compatible with the helix angle of the drainage part 112, thereby improving the sealing performance between the second sealing part 122 and the drainage slope 113.
[0055] In one embodiment, the helix angle B can be selected as 30°, 50°, 70°, etc.
[0056] In one embodiment, the helix angle of the drainage portion 112 is equal to the helix angle of the second sealing portion 122. Thus, after the sealing body 120 is assembled into the injection hole 111, the helically arranged second sealing portion 122 and the helically arranged drainage slope 113 can interlock, which not only improves the sealing performance between the second sealing portion 122 and the drainage slope 113, but also enhances the assembly stability of the sealing body 120 within the injection hole 111.
[0057] It should be noted that in practical applications, the battery cell generally requires two electrolyte injections. After the initial injection, the electrolyte may decrease due to decomposition and evaporation after multiple charge-discharge cycles. A second injection replenishes the lost electrolyte, ensuring the cell's normal operation and stable performance. After the second injection, the interface between the cell's electrodes and the electrolyte tends to stabilize. Under normal operating conditions, electrolyte consumption and performance changes are relatively small; therefore, a third injection is generally unnecessary. To ensure the cell's safety after the second injection, the injection hole 111 is usually completely sealed. This means that the aforementioned sealing body 120 cannot be removed from the injection hole 111 after the second injection.
[0058] Specifically, Figure 5 This is a schematic diagram of the structure of a sealing nail provided for an exemplary embodiment of this application. (See attached diagram.) Figure 1 and Figure 5 As shown, the aforementioned single cell may also include a sealing pin 130, which is disposed in the injection hole 111. The sealing pin 130 is located on the side of the sealing body 120 away from the cell, and the sealing pin 130 is welded to the inner wall of the injection hole 111.
[0059] In practical applications, after the initial electrolyte injection, the sealing body 120 is installed into the electrolyte injection hole 111. When a second electrolyte injection is required, the sealing body 120 is removed from the electrolyte injection hole 111, and then the second electrolyte injection is performed. After the second electrolyte injection, the sealing body 120 is installed into the electrolyte injection hole 111, and then the sealing pin 130 is pressed against the side of the sealing body 120 away from the cell. The sealing pin 130 is then welded to the inner wall of the electrolyte injection hole 111. In this way, the sealing pin 130 can be fixed in the electrolyte injection hole 111, preventing the sealing pin 130 from detaching from the electrolyte injection hole 111. At the same time, the sealing pin 130 can also restrict the sealing body 120 from detaching from the electrolyte injection hole 111, thereby ensuring that the cell can maintain a stable working state for a long time after the second electrolyte injection.
[0060] like Figure 1 and Figure 5 As shown, the injection hole 111 may include a tapered section 115. Correspondingly, the sealing pin 130 is tapered, and the sealing pin 130 mates with the tapered section 115. It should be understood that compared to the cylindrical sealing pin 130, the tapered sealing pin 130 has a larger contact area with the tapered section 115, and the structural strength after welding the inner wall of the sealing pin 130 and the tapered section 115 is greater, which can improve the assembly stability of the sealing pin 130 within the injection hole 111.
[0061] This application also provides an electrical device, including a single battery cell as described in the previous embodiments, and possessing all the functions of the single battery cell. The beneficial effects of this electrical device can be referenced from the beneficial effects of the aforementioned single battery cell.
[0062] In one embodiment, the aforementioned electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, power tools, energy storage devices, amusement equipment, elevators, and lifting equipment, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be carousels, drop towers, etc. This application does not impose any special limitations on the aforementioned electrical equipment.
[0063] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.
[0064] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.
[0065] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.
[0066] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.
[0067] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.
Claims
1. A single-cell battery, characterized in that, include: Battery cell; The outer casing is used to house the battery cell; the outer casing is provided with a liquid injection hole (111), the liquid injection hole (111) is provided with a drainage part (112), the drainage part (112) is provided with a drainage slope (113), the drainage slope (113) is used to guide the liquid on the drainage slope (113) through the liquid injection hole (111); A sealing body (120) is disposed inside the injection hole (111), and the sealing body (120) cooperates with the drainage part (112).
2. The single-cell battery according to claim 1, characterized in that, The drainage section (112) extends spirally around the axis of the injection hole (111), the spiral surface of the drainage section (112) forms the drainage slope (113), and the inner side of the drainage section (112) forms the injection channel (114). One part of the sealing body (120) abuts against the drainage slope (113), and another part of the sealing body (120) cooperates with the injection channel (114) to seal the injection channel (114).
3. The single-cell battery according to claim 2, characterized in that, The spiral angle of the drainage part (112) is A, and A satisfies: 30°≤A≤70°.
4. The single-cell battery according to claim 2, characterized in that, The sealing body (120) includes: The first sealing part (121) cooperates with the injection channel (114) to seal the injection channel (114); The second sealing part (122) extends spirally around the outer side of the first sealing part (121), and the second sealing part (122) abuts against the drainage slope (113).
5. The single-cell battery according to claim 4, characterized in that, The helix angle of the second sealing part (122) is B, and B satisfies: 30°≤B≤70°.
6. The single-cell battery according to claim 4, characterized in that, The helix angle of the drainage part (112) is equal to the helix angle of the second sealing part (122).
7. The single-cell battery according to any one of claims 1 to 6, characterized in that, The single battery cell also includes: A sealing pin (130) is disposed inside the injection hole (111) and located on the side of the sealing body (120) away from the battery cell. The sealing pin (130) is welded to the inner wall of the injection hole (111).
8. The single-cell battery according to claim 7, characterized in that, The injection hole (111) includes a conical section (115), and the sealing pin (130) is a cone, which cooperates with the conical section (115).
9. The single-cell battery according to any one of claims 1 to 6, characterized in that, The surface of the sealing body (120) has an uneven, rough structure.
10. An electrical appliance, characterized in that, include: The single-cell battery as described in any one of claims 1 to 9.