Battery and power consuming device

Abstract

The application relates to the technical field of batteries, and particularly discloses a battery and a power utilization device, wherein the battery comprises a shell, a battery cell, a retainer, a sealing nail and a pole. The inside of the shell comprises a main cavity and a sub-cavity in communication; the battery cell is arranged in the main cavity and leads out a plurality of tabs to the sub-cavity, and the plurality of tabs are gathered to form a tab group; the retainer is arranged in the sub-cavity, and one end thereof in a first direction is provided with a liquid injection hole, and the other end thereof in the first direction is provided with a platform, and the projection of the liquid injection hole in the first direction is located in the coverage range of the platform; one end of the sealing nail seals the liquid injection hole, and the other end thereof is close to the platform; and the pole is connected to the retainer and is welded with the tab group. In the application, the platform is arranged in the retainer, and the projection of the liquid injection hole is located in the coverage range of the platform, so that a directional supporting surface is provided for the end of the sealing nail, and the problem that the sealing nail is inclined due to the support of the arc-shaped structure in the traditional scheme is solved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and specifically discloses a battery and an electrical device. Background Technology

[0002] In some batteries, a retainer is installed inside the casing to support components such as the terminals and tabs. Specifically, the top of the retainer has a filling hole, which is sealed with a sealant pin. However, the bottom of the retainer opposite the filling hole has an arc-shaped structure to fit the shape of the casing. This can make the sealant pin susceptible to misalignment due to overpressure, resulting in poor sealing and a risk of leakage. Utility Model Content

[0003] This application provides a battery and an electrical device to solve the problem of poor sealing caused by the misalignment of the sealing nail pressing against the arc-shaped structure.

[0004] In a first aspect, this application provides a battery comprising a casing, a cell, a retainer, a sealing pin, and terminals. The casing includes a main cavity and a sub-cavity that are connected to each other; the cell is disposed within the main cavity and extends multiple tabs into the sub-cavity, the tabs being brought together to form a tab assembly; the retainer is disposed within the sub-cavity, and has an injection hole at one end along a first direction and a platform at the other end along the first direction, the projection of the injection hole along the first direction being within the coverage area of ​​the platform; one end of the sealing pin seals the injection hole, and the other end is close to the platform; the terminals are connected to the retainer and welded to the tab assembly.

[0005] Secondly, this application also provides an electrical device, including the battery of the first aspect.

[0006] This application has at least the following beneficial effects: By providing a platform within the cage, and ensuring the injection hole projection is within the platform's coverage area, an directional support surface is provided for the end of the sealing pin, solving the problem of sealing pin misalignment caused by the arc-shaped support structure in traditional solutions. In other words, the platform ensures stable force on the sealing pin, preventing overpressure misalignment. Furthermore, the sub-cavity connects to the main cavity, facilitating the extension of the cell's tab assembly into the sub-cavity for retraction. The cage's positioning structure within the sub-cavity enhances overall assembly stability, reducing the risk of leakage from the outset. Attached Figure Description

[0007] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0008] Figure 1This is a schematic diagram of the overall structure of the battery proposed in some embodiments of this application; Figure 2 for Figure 1 An enlarged view at point A; Figure 3 This is a schematic cross-sectional view of the battery at the terminal post according to some embodiments of this application; Figure 4 This is a schematic diagram of the cage structure proposed in some embodiments of this application; Figure 5 This is a cross-sectional schematic diagram of the retainer at the sealing pin as proposed in some embodiments of this application.

[0009] Explanation of reference numerals in the attached figures: 10. Shell; 101. Main cavity; 102. Sub-cavity; 103. Half shell; 104. Cover; 105. Opening; 106. Nail cap; 20. Cell; 201. Electrode assembly; 30. Cage; 301. Injection hole; 302. Platform; 303. Arc-shaped surface; 304. First cavity; 305. Second cavity; 306. Plane; 307. Reinforcing plate; 40. Sealing nail; 50. Terminal post; Z, First direction; X, Second direction; Y, Third direction. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0011] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.

[0012] According to an embodiment of the present invention, in a first aspect, in conjunction with Figures 1 to 5A battery is provided, comprising a housing 10, a cell 20, a retainer 30, a sealing pin 40, and a terminal post 50. The housing 10 includes a main cavity 101 and a sub-cavity 102 that are connected to each other; the cell 20 is disposed in the main cavity 101 and extends multiple tabs to the sub-cavity 102, the multiple tabs being gathered together to form a tab assembly 201; the retainer 30 is disposed in the sub-cavity 102, and has an injection hole 301 at one end along a first direction Z, and a platform 302 at the other end along the first direction Z, the projection of the injection hole 301 along the first direction Z being within the coverage area of ​​the platform 302; one end of the sealing pin 40 seals the injection hole 301, and the other end is close to the platform 302; the terminal post 50 is connected to the retainer 30 and welded to the tab assembly 201.

[0013] In this embodiment, by providing a platform 302 within the retainer 30, and ensuring that the projection of the injection hole 301 is within the coverage area of ​​the platform 302, an directional support surface is provided for the end of the sealing nail 40, thus solving the problem of the sealing nail 40 being skewed due to the arc-shaped support structure in traditional solutions. That is, the platform 302 ensures that the sealing nail 40 is under stable force, avoiding overpressure skew. In addition, the sub-cavity 102 is connected to the main cavity 101, which facilitates the extension of the electrode assembly 201 of the battery cell 20 to the sub-cavity 102 for retraction. The positioning structure of the retainer 30 within the sub-cavity 102 improves the overall assembly stability and reduces the risk of leakage from the source.

[0014] Specifically, referring to the attached figures, the first direction Z is the stacking direction of the electrode sheets in the cell 20, the second direction X is the lead-out direction of the tab group 201, and the third direction Y is perpendicular to the first direction Z and the second direction X.

[0015] In some embodiments, refer to Figure 5 The sealing nail 40 presses against the platform 302.

[0016] In this embodiment, the other end of the sealing pin 40 is directly pressed against the platform 302. The rigid support of the platform 302 restricts the sealing pin 40 from deflection, ensuring that it seals the injection hole 301 vertically along the axial direction. This avoids the deflection of the sealing pin 40 caused by the lack of support or curved surface support in traditional solutions. The pressing contact provides uniform pressure, improves the fit between the sealing pin 40 and the injection hole 301, enhances the sealing reliability, and reduces the probability of leakage.

[0017] In some embodiments, combined with Figures 1 to 3 Key reference Figure 3 The gap between the sub-cavities 102 gradually decreases from the side closest to the main cavity 101 to the side furthest from the main cavity 101, forming an arc-shaped structure.

[0018] In this embodiment, the geometric characteristic of the sub-cavity 102, which "gradually reduces the cavity gap to form an arc-shaped structure", is clearly defined, providing a structural basis for the adaptation of the arc-shaped surface 303 of the cage 30. The arc-shaped structure is the cause of the deflection of the sealing nail 40. Here, it is used as a prerequisite feature and lays the groundwork for solving the deflection problem through the platform 302. At the same time, the tapering design of the arc-shaped structure can guide the flow of electrolyte and avoid electrolyte accumulation at the distal end of the sub-cavity 102.

[0019] In some embodiments, combined with Figure 3 and Figure 4 The retainer 30 is provided with an arc-shaped surface 303, which is adapted to the arc-shaped structure of the sub-cavity 102; the inner wall of the arc-shaped surface 303 is provided with a platform 302.

[0020] In this embodiment, the "adaptation of the arc-shaped surface 303 to the arc-shaped structure of the sub-cavity 102" ensures that the retainer 30 is installed tightly and without shaking in the sub-cavity 102; the "platform 302 on the inner wall of the arc-shaped surface 303" integrates the platform 302 into the adapted arc-shaped structure, which not only utilizes the arc-shaped surface 303 to fit the shell 10, but also provides a flat pressing surface for the sealing nail 40 through the platform 302, directly solving the core problem of the sealing nail 40 being misaligned due to the arc-shaped structure; the platform 302 and the arc-shaped surface 303 are integrally formed, resulting in a compact structure and stable support.

[0021] In some embodiments, refer to Figure 5 The minimum protrusion height of platform 302 relative to arc surface 303 is hmm, and satisfies 0.3mm≤hmm≤1.5mm.

[0022] In this embodiment, a range is defined for the "minimum protrusion height of platform 302 relative to the arc-shaped surface 303" to balance the supporting force and structural interference. Specifically, if the height hmm < 0.3mm, the platform 302 is insufficiently protruding and cannot effectively support the sealing nail 40, potentially leading to skewness. If the height hmm > 1.5mm, the platform 302 protrudes excessively, potentially interfering with the sealing nail 40 or the housing 10, resulting in uneven pressure on the sealing nail 40. This range ensures that the platform 302 has sufficient supporting rigidity while avoiding installation conflicts.

[0023] Specifically, hmm can take any one of 0.3mm, 0.5mm, 1mm and 1.5mm or a range between any two of these values.

[0024] In some embodiments, the arcuate surface 303 forms a guide surface from the sub-cavity 102 to the main cavity 101.

[0025] In this embodiment, the "arc-shaped surface 303 as a flow guiding surface" guides the electrolyte or other fluid in the sub-cavity 102 to flow to the main cavity 101, avoiding fluid accumulation at the arc-shaped bottom of the sub-cavity 102. The flow guiding effect, together with the platform 302 supporting the sealing nail 40, not only solves the tilting problem, but also optimizes the fluid distribution inside the battery, improves the stability of electrochemical performance, and indirectly reduces the risk of corrosion and leakage caused by liquid accumulation.

[0026] In some embodiments, combined with Figures 3 to 5 The retainer 30 forms a first cavity 304 and a second cavity 305, which are independent of each other; the electrode assembly 201 is located in the first cavity 304 and connected to the electrode post 50, and the sealing pin 40 and the platform 302 are located in the second cavity 305.

[0027] In this embodiment, the first cavity 304 and the second cavity 305 are independent of each other to achieve functional partitioning. That is, the first cavity 304 is used for the tab assembly 201 to be folded and welded to the pole post 50 to avoid welding heat or metal debris from interfering with the sealing area; while the second cavity 305 is used for liquid injection sealing to isolate the tab assembly 201 from mechanical interference with the sealing nail 40. The partitioning design improves the "purity" of the sealing area, ensuring that the platform 302's support for the sealing nail 40 is not affected by other components, thus enhancing the reliability of the seal.

[0028] In some embodiments, combined with Figure 4 and Figure 5 The retainer 30 has a flat surface 306, which has an injection hole 301. The second cavity 305 has a reinforcing plate 307, which is supported between the flat surface 306 and the arc surface 303.

[0029] In this embodiment, the "injection hole 301 on the plane 306" provides a flat reference for the opening 105, which facilitates the precise installation of the sealing nail 40; the "reinforcing plate 307 supported between the plane 306 and the arc-shaped surface 303" enhances the structural strength of the retainer 30, prevents the platform 302 from shifting due to deformation of the arc-shaped surface 303 under stress, and ensures the long-term stable support of the platform 302 for the sealing nail 40; the combined structure of the plane 306 and the reinforcing plate 307 takes into account both the accuracy of the opening 105 and the overall rigidity.

[0030] In some embodiments, combined with Figure 4 and Figure 5 The reinforcing plate 307 divides the second cavity 305 into two chambers, with the platform 302 and the sealing nail 40 located in one of the chambers.

[0031] In this embodiment, the "reinforcing plate 307 divides the second cavity 305 into two chambers" further isolates the sealing area: the chamber where the platform 302 and the sealing nail 40 are located are independently enclosed, preventing components (such as possible wiring harnesses or structural parts) in the other chamber from colliding with the sealing nail 40; limiting the platform 302 and the sealing nail 40 to specific chambers facilitates precise positioning during assembly, and the chamber separation can reduce the impact of external impacts on the sealing nail 40, improving the resistance to vibration and leakage.

[0032] In some embodiments, refer to Figure 5 The distance between the contact surface of platform 302 and the adhesive nail and plane 306 is dmm, and satisfies 5mm≤dmm≤9mm.

[0033] In this embodiment, the distance dmm between the platform 302 and the contact surface of the adhesive nail and the plane 306 is defined to control the effective compression stroke of the sealing nail 40: when the distance dmm < 5mm, the sealing nail 40 is too short, and the compression after pressing against the platform 302 is insufficient, resulting in a poor seal; when the distance dmm > 9mm, the sealing nail 40 is too long, and excessive compression may cause deformation of the injection hole 301 or breakage of the sealing nail 40. This range ensures that the sealing nail 40 undergoes appropriate elastic deformation when pressing against the platform 302, forming a reliable seal without damaging the structure.

[0034] Specifically, dmm can be any one of 5mm, 6mm, 7mm, 8mm and 9mm or a range between any two of these values.

[0035] In some embodiments, combined with Figures 1 to 3 The shell 10 includes a half shell 103 and a cover 104. The half shell 103 is provided with a groove, and the cover 104 covers the groove and forms a main cavity 101 and a sub-cavity 102.

[0036] In this embodiment, the combined structure of "half-shell 103 with groove + cover 104 for sealing" facilitates the separate manufacturing and assembly of shell 10. The groove clearly defines the space of main cavity 101 (accommodating battery cell 20) and sub-cavity 102 (accommodating cage 30). "Cover 104 for sealing" ensures the sealing of the cavity. At the same time, the splicing surface of half-shell 103 and cover 104 can serve as a reference for the connection between main cavity 101 and sub-cavity 102, which facilitates the extension of the electrode assembly 201 led out from battery cell 20 from main cavity 101 to sub-cavity 102. It also makes the installation and positioning of cage 30 in sub-cavity 102 more accurate.

[0037] In some embodiments, refer to Figure 1 , Figure 2 and Figure 4 The cover 104 is provided with an opening 105, which corresponds to the injection hole 301. The diameter of the opening 105 is less than or equal to the diameter of the injection hole 301.

[0038] In this embodiment, "the opening 105 corresponds to the injection hole 301" to ensure that the liquid flows accurately into the injection hole 301 during external injection operations, avoiding deviation; "the diameter of the opening 105 is less than or equal to the diameter of the injection hole 301" to limit the injection flow rate and prevent foreign objects from entering the injection hole 301 through the opening 105; the opening 105 serves as the outer port of the injection channel and cooperates with the inner port of the injection hole 301 to form a graded sealing structure, improving the overall leak-proof capability.

[0039] In some embodiments, refer to Figure 1 , Figure 2 and Figure 4 The housing 10 also includes a nail head 106, which seals the opening 105 and limits the end of the sealing nail 40.

[0040] In this embodiment, the "nail cap 106 sealing opening 105" forms a second seal (the first seal is the sealing nail 40 sealing the liquid injection hole 301), and the double seal greatly reduces the risk of leakage; the "nail cap 106 limiting the end of the sealing nail 40" prevents the sealing nail 40 from moving axially or falling out through mechanical restraint, ensuring that the sealing nail 40 is always stably pressed against the platform 302; the cooperation between the nail cap 106 and the sealing nail 40 further improves the vibration and impact resistance of the sealing system, which is especially suitable for battery applications in dynamic environments.

[0041] Secondly, embodiments of this application provide an electrical device that includes the battery of the first aspect. Therefore, the electrical device of the second aspect possesses all the technical effects of the battery of the first aspect, the specific technical effects of which will not be elaborated further. It should be understood that the electrical device includes other components besides the battery, which will not be described in detail here.

[0042] It should be noted that battery devices can serve as the operating power source for electrical devices, or as the driving power source for electrical devices, replacing or partially replacing fuel or natural gas to provide propulsion for vehicles. Electrical devices include devices in a wide range of technological fields such as energy storage equipment, electric ships, aircraft, laptops, power tools, electric bicycles, electric motorcycles, electric cars, military equipment, and aerospace.

[0043] In particular, the term "and / or" in this application should be understood as follows: In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.

[0044] In the second case, the term "and / or" between the last two of three or more subjects means including at least one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject; Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.

[0045] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that, include: The shell (10) includes a main cavity (101) and a sub-cavity (102) that are connected to each other. The battery cell (20) is located in the main cavity (101) and leads out multiple electrodes to the sub-cavity (102). The multiple electrodes are gathered together to form an electrode group (201). A retainer (30) is disposed in the sub-cavity (102), and has an injection hole (301) at one end along the first direction (Z) and a platform (302) at the other end along the first direction (Z). The projection of the injection hole (301) along the first direction (Z) is located within the coverage area of ​​the platform (302). A sealing pin (40) seals the injection hole (301) at one end and is close to the platform (302) at the other end. The pole post (50) is connected to the retainer (30) and welded to the tab assembly (201).

2. The battery according to claim 1, characterized in that, The sealing nail (40) presses against the platform (302).

3. The battery according to claim 2, characterized in that, The gap between the sub-cavities (102) gradually decreases from the side closer to the main cavity (101) to the side farther away from the main cavity (101), forming an arc-shaped structure.

4. The battery according to claim 3, characterized in that, The retainer (30) has an arc-shaped surface (303) that is adapted to the arc-shaped structure of the sub-cavity (102); the inner wall of the arc-shaped surface (303) is provided with the platform (302).

5. The battery according to claim 4, characterized in that, The minimum protrusion height of the platform (302) relative to the arc surface (303) is hmm, and satisfies 0.3mm≤hmm≤1.5mm.

6. The battery according to claim 4, characterized in that, The arc-shaped surface (303) forms a guide surface from the sub-cavity (102) to the main cavity (101).

7. The battery according to claim 4, characterized in that, The retainer (30) forms a first cavity (304) and a second cavity (305), which are independent of each other; the electrode assembly (201) is located in the first cavity (304) and connected to the electrode post (50); the sealing pin (40) and the platform (302) are located in the second cavity (305).

8. The battery according to claim 7, characterized in that, The retainer (30) has a plane (306) with the injection hole (301) and a reinforcing plate (307) in the second cavity (305). The reinforcing plate (307) is supported between the plane (306) and the arc surface (303).

9. The battery according to claim 8, characterized in that, The reinforcing plate (307) divides the second cavity (305) into two chambers, and the platform (302) and the sealing nail (40) are located in one of the chambers.

10. The battery according to claim 8, characterized in that, The distance between the contact surface of the platform (302) and the adhesive nail and the plane (306) is dmm, and satisfies 5mm≤dmm≤9mm.

11. The battery according to claim 1, characterized in that, The housing (10) includes a half-shell (103) and a cover (104). The half-shell (103) is provided with a groove, and the cover (104) covers the groove and forms the main cavity (101) and the sub-cavity (102).

12. The battery according to claim 11, characterized in that, The cover (104) is provided with an opening (105), which corresponds to the injection hole (301). The diameter of the opening (105) is less than or equal to the diameter of the injection hole (301).

13. The battery according to claim 12, characterized in that, The housing (10) also includes a nail head (106) that seals the opening (105) and limits the end of the sealing nail (40).

14. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1 to 13.

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