Single battery

Abstract

The single battery comprises a roll core, a shell and an insulating spacer, a containing cavity is formed in the shell, the roll core is arranged in the containing cavity, electrolyte is filled in the containing cavity, the insulating spacer is arranged in the containing cavity, and the insulating spacer comprises a main body part and a plurality of supporting ribs which are connected with each other. The main body part is propped against the end part of the roll core, the supporting rib is propped against the end part of the shell, and the main body part is provided with a through hole through which a pole lug of the roll core penetrates out, so that the technical problems that the insulation spacer in the existing battery has limitation in electrolyte retention and is insufficient in impact and vibration bearing capability are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a single-cell battery. Background Technology

[0002] In battery research and application, the good wetting ability of the electrolyte is crucial to battery performance, and the maintenance and uniform distribution of the electrolyte are important factors in ensuring battery performance and safety. In existing battery designs, insulating pads, as key components, are mainly used to provide electrical insulation and mechanical support. However, traditional insulating pad structures are relatively simple and lack optimized design for electrolyte flow, often failing to effectively promote the uniform distribution of electrolyte in various areas of the battery. This leads to uneven electrolyte distribution within the battery, thus affecting charge-discharge efficiency and cycle life.

[0003] Secondly, batteries often face various environmental challenges in practical applications, including temperature changes, vibration, and shock. These external factors can affect the structural stability and insulation performance of the battery, increasing the risk of battery failure. Therefore, the performance of insulating pads in withstanding external mechanical shock and vibration urgently needs to be improved to ensure the safe operation of batteries under harsh conditions.

[0004] In summary, the shortcomings of existing battery insulating pads in terms of electrolyte retention, distribution uniformity, and mechanical strength limit battery performance improvement and safety. Utility Model Content

[0005] One objective of this invention is to provide a single-cell battery that addresses the limitations of existing batteries in retaining the insulating pad in the electrolyte and their insufficient ability to withstand impact and vibration.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a single-cell battery, the single-cell battery comprising a core; a housing having an internal cavity, the core being disposed within the cavity and the cavity being filled with electrolyte; and an insulating gasket disposed within the cavity, the insulating gasket comprising an interconnected main body and a plurality of supporting ribs, the main body abutting against the end of the core, the supporting ribs abutting against the end of the housing, and the main body having a through hole for the tabs of the core to pass through.

[0007] Optionally, the support ribs include a first support rib, a second support rib, and a third support rib. The first support ribs are spaced apart on a first circumference, the second support ribs are spaced apart on a second circumference, and the third support ribs are spaced apart on a third circumference. The first, second, and third circumferences are located on the end face of the main body near the support ribs, with the axis of the through hole as the center, and the radii decrease sequentially.

[0008] Optionally, the first support ribs are evenly distributed on the first circumference, and the ratio of the length of the first support ribs to the circumference of the first circumference is A, where 0.5 < A < 0.66; the second support ribs are evenly distributed on the second circumference, and the ratio of the length of the second support ribs to the circumference of the second circumference is B, where 0.5 < B < 0.66; the third support ribs are evenly distributed on the third circumference, and the ratio of the length of the third support ribs to the circumference of the third circumference is C, where 0.5 < C < 0.66.

[0009] Optionally, the difference in radius between adjacent circumferences among the first circumference, the second circumference, and the third circumference is N millimeters, where 3 < N < 5.

[0010] Optionally, the difference in radius between adjacent circumferences among the first circumference, the second circumference, and the third circumference is N millimeters, where 3.75 < N < 4.25.

[0011] Optionally, in the direction of the through-hole diameter, the width of the second support ribs is greater than the width of the first support ribs and the width of the third support ribs respectively.

[0012] Optionally, the support ribs are arranged along the circumference, and the main body is provided with adjustment slots. The support ribs are slidably connected to the adjustment slots, and the adjustment slots are used for position adjustment of the support ribs.

[0013] Optionally, the main body is further provided with a plurality of mounting holes, and the mounting holes are located in the adjustment slots; the support ribs include a support portion and a mounting portion connected to each other. The mounting portion is clamped with at least one of the plurality of mounting holes, and the support portion abuts against the end of the housing.

[0014] Optionally, in the direction of the through-hole diameter, the distance between the opposite side surfaces of the support ribs is K millimeters, where 0.1 < K < 0.5. <​​​​​​​​​​​​​​​​​

[0021] The beneficial effects of this utility model are as follows:

[0022] Compared to existing batteries, this application employs a double-layer insulating gasket structure, fully considering the load-bearing requirements of the core and optimizing electrolyte distribution. In this structure, the main body is primarily responsible for the load-bearing task of the core, while the tightly connected support ribs at its bottom play a crucial dual role. On one hand, the support ribs, through a rational layout, form a stable support frame. This frame significantly enhances the overall rigidity of the insulating gasket, enabling it to effectively disperse and mitigate stress caused by external impacts and vibrations. When the battery faces mechanical impacts or vibrations, the design of the support ribs prevents deformation of the insulating gasket, thereby protecting the integrity of the core and ensuring battery safety. On the other hand, the support ribs provide effective space and guidance for the uniform distribution of the electrolyte. The gaps between the support ribs form a flow channel network, allowing the electrolyte to flow freely inside the battery. This flow channel design optimizes the electrolyte flow path, ensuring its uniform distribution throughout the core, improving electrolyte wettability and reaction efficiency. This not only improves the battery's charge-discharge performance but also significantly extends its cycle life, maintaining good performance during long-term use. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic cross-sectional view of a single battery provided in an embodiment of this utility model;

[0025] Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified view of a portion of region A in the middle;

[0026] Figure 3 This is a schematic diagram of the structure of an insulating gasket provided in an embodiment of this utility model;

[0027] Figure 4 This is a diagram showing the flow direction of the electrolyte inside the insulating gasket provided in this embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of another insulating gasket provided in an embodiment of the present invention;

[0029] Figure 6 This is provided by the embodiment of the present utility model. Figure 5A cross-sectional view along the AA direction;

[0030] Figure 7 This is provided by the embodiment of the present utility model. Figure 6 A magnified view of a portion of region B in the middle;

[0031] Figure 8 This is a schematic diagram of the structure of another insulating gasket provided in this embodiment of the utility model;

[0032] Figure 9 This is provided by the embodiment of the present utility model. Figure 8 A cross-sectional schematic diagram of the middle insulating gasket structure;

[0033] Figure 10 This is provided by the embodiment of the present utility model. Figure 8 Top view of the insulating pad.

[0034] Explanation of icon numbers:

[0035] 10. Core; 20. Outer shell; 21. Receiving cavity; 30. Insulating gasket; 31. Main body; 311. Through hole; 312. Adjustment groove; 313. Mounting hole; 32. Support rib; 321. First support rib; 322. Second support rib; 323. Third support rib; 324. Support part; 325. Mounting part; 326. Immersion hole; 33. Protrusion; 34. Limiting layer. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic cross-sectional view of a single battery provided in an embodiment of this utility model. Figure 2 This is provided by the embodiment of the present utility model. Figure 1 A magnified view of a portion of region A in the middle.

[0038] This utility model provides a single-cell battery designed to improve overall battery performance and safety through optimized structural design. The single-cell battery includes a core 10, a casing 20, and an insulating pad 30. The casing 20 has an internal cavity 21, within which the core 10 is disposed. The cavity 21 is filled with electrolyte to ensure normal battery operation.

[0039] The insulating gasket 30 has a double-layer structure, specifically including a main body 31 and multiple supporting ribs 32. The main body 31 and the supporting ribs 32 are interconnected. The insulating gasket 30 is disposed within the receiving cavity 21, wherein the main body 31 abuts tightly against the end of the winding core 10, providing stable support for the winding core 10. At the same time, the supporting ribs 32 abut against the end of the outer shell 20, dispersing the mechanical stress generated during operation.

[0040] In addition, the main body 31 is provided with a through hole 311 for the tabs of the winding core 10 to pass through. The through hole 311 can accommodate batteries of different specifications and types, which not only ensures a reliable connection between the winding core 10 and the external circuit, but also provides flexibility for the overall battery design.

[0041] In this embodiment, compared with existing batteries, this application innovatively adopts a double-layer insulating pad 30 structure. The main body 31 is responsible for bearing the core 10, while the support rib 32 tightly connected to the bottom of the main body 31 has two functions.

[0042] First, the support ribs 32 serve as a reinforcing structure. The layout of the support ribs 32 forms a support frame, which enhances the overall rigidity of the insulating pad 30. It can effectively disperse and alleviate the stress caused by external impacts and vibrations, so that the insulating pad 30 can effectively prevent deformation when facing external impacts, thereby protecting the integrity of the core 10 and the safety of the battery.

[0043] Secondly, the support ribs 32 provide space and guidance for the uniform distribution of the electrolyte. The gaps between the support ribs 32 allow the electrolyte to flow freely, forming a flow channel network, optimizing the flow path of the electrolyte inside the battery, improving the wettability and reaction efficiency of the electrolyte in various parts of the core 10, thereby improving the charge-discharge performance and cycle life of the battery.

[0044] Further, please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of an insulating pad 30 provided in an embodiment of the present invention. Figure 4 This is a flow diagram of the electrolyte within the insulating gasket 30 provided in this embodiment of the invention. The supporting ribs 32 specifically include a first supporting rib 321, a second supporting rib 322, and a third supporting rib 323. These supporting ribs 32 are distributed in different circumferences. The first supporting ribs 321 are evenly spaced on the first circumference, the second supporting ribs 322 are spaced on the second circumference, and the third supporting ribs 323 are distributed on the third circumference. The first, second, and third circumferences are located on the side of the main body 31 of the insulating gasket 30 near the supporting ribs 32, and are three concentric circles centered on the axis of the through hole 311, with their radii decreasing sequentially. Multiple notches are formed on each circumference for the flow of electrolyte.

[0045] In this embodiment, the support ribs 32 are divided into a three-layer structure and are distributed in a circumferentially spaced manner around the axis of the through hole 311. The first support ribs 321 are distributed in the outermost layer, providing the overall support force. And due to their relatively large radius, they can effectively disperse the externally applied pressure and impact force. The second support ribs 322 are located in the middle layer, further enhancing the structural stability and providing good intermediate support. The third support ribs 323 are located in the inner layer, close to the end of the core 10, to prevent the insulating gasket 30 from breaking at the middle part.

[0046] The spaced distribution of the support ribs 32 presents multiple arc-shaped supports on the same circumference, forming multiple gaps. Combining with the well-defined distribution of the support ribs 32, it provides a flow channel for the electrolyte to optimize the distribution space of the electrolyte. The flow channels between the support ribs 32 provide guidance for the flow of the electrolyte, allowing the electrolyte to flow more freely inside the battery, making its infiltration more uniform among different regions, thereby improving the charge-discharge efficiency and cycle life of the battery.

[0047] Furthermore, on each circumference, the support ribs 32 are evenly spaced. The uniform distribution ensures that regular voids are formed between the support ribs 32, which helps to optimize the overall mechanical properties of the insulating gasket 30. At the same time, in order to further improve the fluidity of the electrolyte inside the battery, the ratio of the length of the support ribs 32 on each circumference to the circumference of the circle is limited to be between 0.5 and 0.66. While providing sufficient mechanical support, the support ribs 32 reserve appropriate flow channels to form an orderly flow channel network.

[0048] In this embodiment, the ratio range is based on a comprehensive consideration of the flow characteristics of the electrolyte and the mechanical properties of the support ribs 32. When the ratio of the length of the support ribs 32 to the circumference of the circle is between 0.5 and 0.66, the size of the voids on each circumference is just right, which can effectively guide the flow of the electrolyte at the bottom of the insulating gasket 30 to form a uniform liquid flow distribution. The uniform liquid flow distribution not only improves the wettability of the electrolyte on the surface of the core 10, but also prevents the uneven local reaction caused by liquid retention or poor flow.

[0049] Furthermore, considering the spatial distribution of the support ribs 32 between different layers, it should be able to effectively enhance the structural strength without being too close to affect the distribution of the electrolyte. Therefore, the radius difference between adjacent circumferences of the first circumference, the second circumference and the third circumference is set to N millimeters, and the condition 3 < N < 5 is satisfied, aiming to provide the best conditions for the flow of the electrolyte and mechanical support.

[0050] In this embodiment, by reasonably setting the range of the radius difference N between adjacent circumferences, both mechanical strength and fluidity are taken into account. The spacing needs to be greater than 3 mm to provide effective space for the smooth flow of the electrolyte, reduce the flow resistance, and improve the overall charge-discharge efficiency and cycle life of the battery. And the spacing needs to be less than 5 mm to ensure that the battery has sufficient compressive resistance when subjected to external impacts and vibrations, so as to maintain the stability and safety of the battery.

[0051] Further, among the first circumference, the second circumference and the third circumference, the radius difference N between adjacent circumferences can be further limited to 3.75 mm < N < 4.25 mm.

[0052] In this embodiment, based on the comprehensive optimization of the structural stability of the insulating gasket 30 and the flow characteristics of the electrolyte. By precisely controlling the radius difference between adjacent circumferences, it is ensured that the distribution of the support ribs 32 reaches a balance between mechanical strength and hydrodynamic performance. It can not only provide sufficient structural support but also leave a reasonable channel for the flow of the electrolyte. When the value of N is close to 3.75 mm, the distribution of the support ribs 32 between adjacent circumferences is more compact, which helps to improve the overall rigidity and impact resistance of the gasket, so as to enhance the protection effect on the battery core when the battery is subjected to external forces; when the value of N is close to 4.25 mm, the interval between the support ribs 32 slightly increases, creating a wider path for the flow of the electrolyte, and improving the permeability and reaction efficiency of the electrolyte around the battery core.

[0053] Further, considering the stress conditions borne by different levels of the support ribs 32 during the operation of the battery. In the diameter direction of the through hole 311, the width of the second support rib 322 is designed to be greater than the widths of the first support rib 321 and the third support rib 323.

[0054] In this embodiment, due to its position characteristics, the second circumference usually bears relatively concentrated stress. Therefore, the width of the second support rib 322 is correspondingly increased to better disperse and bear these stresses.

[0055] Further, please refer to Figures 5 to 7 , Figure 5 which is a schematic structural diagram of another insulating gasket 30 provided by an embodiment of the present invention. Figure 6 which is provided by an embodiment of the present invention Figure 5 and is a schematic cross-sectional view in the A-A direction in Figure 7 which is provided by an embodiment of the present invention Figure 6 and is a partial enlarged view of the B region in . For the convenience of adjusting the distribution of the support ribs 32, the support ribs 32 are uniformly arranged along the circumference and are slidably connected to the main body 31 through the adjustment grooves 312. The existence of the adjustment grooves 312 enables the support ribs 32 to be adjusted in position according to actual needs to meet the specific requirements in different battery application scenarios.

[0056] In this embodiment, the adjusting groove 312 is arranged in the circumferential direction to ensure that the support rib 32 can slide smoothly in the groove without jamming. Without affecting the stability of the main body 31, sufficient adjustment space is provided. By allowing the sliding adjustment of the support rib 32, the battery can self-adapt when encountering different mechanical stresses and working conditions, improving the stability of the structure. In addition, the movement of the support rib 32 in the adjusting groove 312 can help optimize the flow path of the electrolyte, making it more evenly distributed inside the battery, thereby improving the charge-discharge performance and cycle life of the battery.

[0057] Furthermore, the main body 31 is further provided with a plurality of mounting holes 313, which are located in the adjusting groove 312 and are used for clamping with the support rib 32. The structure of the support rib 32 includes a support portion 324 and a mounting portion 325 that are connected to each other, and the mounting portion 325 is clamped with at least one of the plurality of mounting holes 313 to fix the support rib 32. The support portion 324 is in close contact with the end of the outer shell 20 to play a supporting role.

[0058] In this embodiment, a reliable clamping relationship can be formed between the mounting hole 313 and the mounting portion 325 of the support rib 32. The support rib 32 can be flexibly slid and adjusted in the adjusting groove 312 without affecting the stability of its connection with the main body 31.

[0059] Furthermore, considering the spatial relationship of the support rib 32, in the diameter direction of the through hole 311, the distance between the support rib 32 and the two opposite sides is set to K millimeters, and the condition of 0.1 < K < 0.5 is satisfied, aiming to optimize the flow and retention ability of the electrolyte.

[0060] In this embodiment, the distance between the two opposite sides of the support rib 32, that is, the width of the support rib 32, is limited. If the width of the support rib 32 is too large, it will cause the flow space to be tight and affect the flow of the electrolyte. If the width of the support rib 32 is too small, the support strength will be insufficient. When the width of the support rib 32 is within the limited range of this embodiment, it can ensure that the support rib 32 has sufficient strength when承受应力 (withstood stress), while not affecting the flow and diffusion of the electrolyte.

[0061] Furthermore, the distance K between the two opposite sides of the support rib 32 can be further limited to 0.25 millimeters < K < 0.35 millimeters.

[0062] In this embodiment, the width of the electrolyte flow channel and the mechanical strength of the support ribs 32 are considered to ensure the performance stability and safety of the battery during operation. Limiting the spacing K of the support ribs 32 to between 0.25 mm and 0.35 mm enhances the rigidity of the support ribs 32, improving the overall structural stability and shock resistance of the gasket. This better resists the effects of external impacts and vibrations, effectively protecting the battery cell and extending its lifespan. It also provides a wider channel for electrolyte flow, facilitating uniform distribution and efficient flow of the electrolyte within the gasket, avoiding localized stagnation or uneven flow rates caused by narrow channels, thereby improving the battery's charge / discharge performance and cycle efficiency.

[0063] Further, please refer to Figure 8 , Figure 8 This is a schematic diagram of another insulating pad 30 provided in this embodiment of the present invention. The support ribs 32 can also be distributed in another way. Specifically, multiple support ribs 32 are arranged along the diameter direction of the through hole 311 and distributed around the axis of the through hole 311. The aim is to further optimize the structure and performance of the battery through different arrangements of the support ribs 32.

[0064] In this embodiment, the support ribs 32 are radially distributed around the axis of the through hole 311. This radial distribution allows each support rib 32 to evenly distribute the externally applied force, reducing stress concentration. Since the support ribs 32 radiate outwards from the axis of the through hole 311, they effectively improve the overall structural rigidity, enabling the battery to exhibit better compressive strength when subjected to external impacts and vibrations. Furthermore, the radial distribution provides a more ideal channel for electrolyte flow, allowing it to flow more smoothly within the battery and ensuring sufficient wetting of all areas.

[0065] Further, please refer to Figure 9 , Figure 9 This is provided by the embodiment of the present utility model. Figure 8 A cross-sectional schematic diagram of the structure of the insulating gasket 30. To improve the electrolyte flow efficiency, multiple immersion holes 326 are provided on the side of the supporting rib 32 in the diameter direction of the through hole 311, designed to promote electrolyte flow. The presence of the immersion holes 326 provides an effective channel for the uniform distribution of electrolyte inside the battery, allowing it to better penetrate into various areas of the core 10 during battery operation, thereby improving the overall performance of the battery.

[0066] In this embodiment, the number and distribution of the liquid immersion holes 326 can be adaptively set according to specific requirements to ensure that their layout on the support ribs 32 can not only maintain the strength of the support ribs 32 but also promote the flow of the electrolyte. The electrolyte can flow rapidly through the liquid immersion holes 326, avoiding the phenomenon of local dryness caused by uneven liquid flow, thereby improving the charge and discharge efficiency of the battery and enhancing the cycle life and performance of the battery.

[0067] Furthermore, the distance from the side of the support rib 32 away from the main body 31 to the side of the main body 31 close to the support rib 32 is defined as the height H millimeters of the support rib 32, and it satisfies the condition of 0.8 < H < 1.2. The limitation of the height takes into account the importance of the support rib 32 in the overall structure of the battery, aiming to ensure that it has sufficient support capacity and stability.

[0068] In this embodiment, the selection of the height H of the support rib 32 directly affects its support effect on the battery structure. By setting the height H between 0.8 and 1.2 millimeters, an appropriate height can effectively improve the compressive strength of the support rib 32, enabling it to better disperse and withstand these stresses when facing externally applied forces, thereby preventing premature fatigue and damage of the material.

[0069] Furthermore, please refer to Figure 10 , Figure 10 is the top view of the insulating gasket 30 provided by the embodiment of the present utility model. To enhance the overall stability and safety of the battery, the insulating gasket 30 further includes a protrusion 33 structure. A plurality of protrusions 33 are provided on the side of the main body 31 facing away from the support rib, aiming to enhance the bonding force between the core 10 and the insulating gasket 30 to effectively prevent the core 10 from sliding during operation.

[0070] In this embodiment, the protrusions 33 can be strip-shaped, dot-shaped or corrugated, which can provide sufficient friction to prevent the core 10 from displacing when subjected to mechanical vibration or external impact. The protrusions 33 can not only physically limit the movement of the core 10 but also absorb and disperse the stress applied to the core 10 to a certain extent, reducing the risk of material damage caused by sliding.

[0071] In addition, the number and height of the protrusions 33 can be adjusted according to actual needs to meet the design requirements of different types of cores 10. In some specific applications, increasing the number or height of the protrusions 33 can further enhance the fixing effect of the core 10 to ensure that the core 10 remains stable under extreme working conditions.

[0072] ​Furthermore, the insulating pad 30 also includes a limiting layer 34, which is disposed at the edge of the main body 31 and extends away from the support rib 32. This is intended to provide additional restraint for the core 10, limiting its range of movement within the battery, thereby further enhancing the overall stability and safety of the battery.

[0073] In this embodiment, the limiting layer 34 is typically presented as an annular raised edge structure, forming a physical barrier to limit the movement range of the core 10, effectively preventing the core 10 from being displaced due to external vibration or impact during operation, while also reducing friction and wear between the core 10 and other components.

[0074] The limiting layer 34 not only prevents the lateral movement of the winding core 10, but also ensures that the winding core 10 remains in the optimal position during charging and discharging, thereby improving the charging and discharging efficiency of the battery. In addition, the limiting layer 34 also facilitates the assembly and maintenance of the battery, making the positioning of the winding core 10 more accurate and reducing performance degradation caused by improper installation.

[0075] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0076] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0077] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0078] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A single-cell battery, characterized in that, Comprising: A core; A housing with an accommodation cavity inside. The core is disposed in the accommodation cavity, and the accommodation cavity is filled with an electrolyte; An insulating gasket disposed in the accommodation cavity. The insulating gasket includes a main body portion and a plurality of support ribs connected to each other. The main body portion abuts against the end of the core, and the support ribs abut against the end of the housing. The main body portion is provided with a through hole for the tab of the core to pass through.

2. A single-cell battery according to claim 1, characterized in that, The support ribs include a first support rib, a second support rib, and a third support rib. The first support rib is spaced apart on a first circumference, the second support rib is spaced apart on a second circumference, and the third support rib is spaced apart on a third circumference. Among them, the first circumference, the second circumference, and the third circumference are located on the end face of the main body portion close to the support ribs, and are centered on the axis of the through hole, and the radii decrease in sequence.

3. A single-cell battery according to claim 2, characterized in that, The first support rib is evenly distributed on the first circumference, and the ratio of the length of the first support rib to the circumference of the first circumference is A, where 0.5 < A < 0.66; the second support rib is evenly distributed on the second circumference, and the ratio of the length of the second support rib to the circumference of the second circumference is B, where 0.5 < B < 0.66; the third support rib is evenly distributed on the third circumference, and the ratio of the length of the third support rib to the circumference of the third circumference is C, where 0.5 < C < 0.

66.

4. A single-cell battery according to claim 2, characterized in that, The difference in radius between adjacent circumferences of the first circumference, the second circumference, and the third circumference is N millimeters, where 3 < N < 5.

5. A single-cell battery according to claim 4, characterized in that, The difference in radius between adjacent circumferences of the first circumference, the second circumference, and the third circumference is N millimeters, where 3.75 < N < 4.

25.

6. A single-cell battery according to claim 2, characterized in that, In the direction of the diameter of the through hole, the width of the second support rib is greater than the width of the first support rib and the width of the third support rib respectively.

7. A single-cell battery according to claim 1, characterized in that, The support ribs are arranged along the circumference. The main body portion is provided with an adjustment groove, and the support ribs are slidably connected to the adjustment groove. The adjustment groove is used for adjusting the position of the support ribs.

8. A single-cell battery according to claim 7, characterized in that, The main body portion is further provided with a plurality of mounting holes, and the mounting holes are located in the adjustment groove; The support rib includes a support portion and a mounting portion connected to each other. The mounting portion is clamped with at least one of the plurality of mounting holes, and the support portion abuts against the end of the housing.

9. A single-cell battery according to any one of claims 1-8, characterized in that, In the direction of the diameter of the through hole, the distance between the opposite two side faces of the support rib is K millimeters, where 0.1 < K < 0.

5.

10. A single-cell battery according to claim 9, characterized in that, In the direction of the diameter of the through hole, the distance between the opposite two side faces of the support rib is K millimeters, where 0.25 < K < 0.

35.

11. A single-cell battery according to claim 1, characterized in that, A plurality of the support ribs are arranged in the direction of the diameter of the through hole and are distributed around the axis of the through hole.

12. A single-cell battery according to claim 11, characterized in that, In the direction of the diameter of the through hole, the side face of the support rib is provided with liquid immersion holes for the circulation of the electrolyte.

13. A single-cell battery according to any one of claims 1-8, characterized in that, The distance from the side of the support rib away from the main body portion to the side of the main body portion close to the support rib is the height H millimeters of the support rib, where 0.8 < H < 1.

2.

14. A single-cell battery according to any one of claims 1-8, characterized in that, The insulating gasket includes a protrusion, and the protrusion is provided on the side of the main body portion facing away from the support rib to prevent the core from sliding.

15. A single-cell battery according to any one of claims 1-8, characterized in that, The insulating pad also includes a limiting layer, which is disposed at the edge of the main body and extends away from the supporting rib.

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