Battery and electric device

Abstract

The utility model provides a kind of battery and electric equipment, battery includes shell, top cover, confluence spare and sealing part, the top of shell is provided with opening, top cover is covered in opening, confluence spare is located in shell, and it is arranged along the direction of shell top to bottom and top cover interval, confluence spare, top cover and shell are collectively enclosed and form the accommodation space, sealing part is installed in accommodation space, to with confluence spare, top cover and shell seal connection, sealing part includes first sealing ring and second sealing ring, which are sequentially connected and arranged along the direction of shell top to bottom, the hardness of first sealing ring is greater than the hardness of second sealing ring. In this way, the first sealing ring has a higher hardness, which can provide stronger support and anti-deformation ability, and is not easily collapsed under external pressure or impact, thereby effectively preventing external impurities (such as moisture, dust, etc.) from entering the battery interior. The second sealing ring has a lower hardness, which can better adapt to deformation, fill small gaps and further improve the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to batteries and electrical equipment. Background Technology

[0002] In related technologies, cylindrical batteries typically include a casing, a top cover, a busbar, a winding core, and a sealing ring. The busbar and the winding core are both located inside the casing, and the top cover is located at the opening of the casing. A sealing ring with relatively low hardness is sandwiched between the top cover and the casing to seal the gap between the casing and the top cover; however, this sealing effect is relatively poor. Utility Model Content

[0003] The present invention provides a battery and an electrical device that aim to improve the battery's sealing performance.

[0004] In a first aspect, embodiments of the present invention provide a battery.

[0005] In one embodiment, the battery includes:

[0006] A housing, wherein an opening is provided at the top of the housing;

[0007] A top cover is provided over the opening;

[0008] A manifold is disposed inside the housing and is spaced apart from the top cover along the direction from the top to the bottom of the housing. The manifold, the top cover, and the housing together enclose a placement space.

[0009] A sealing part is installed in the placement space for sealing connection with the manifold, the top cover and the housing. The sealing part includes a first sealing ring and a second sealing ring connected sequentially along the top to the bottom of the housing. The first sealing ring at least partially abuts against the top cover, and the side of the second sealing ring opposite to the first sealing ring abuts against the manifold.

[0010] The hardness of the first sealing ring is greater than that of the second sealing ring.

[0011] In one embodiment, the material of the first sealing ring includes a perfluoroalkoxy polymer; and / or,

[0012] The material of the second sealing ring includes fluororubber; and / or,

[0013] The first sealing ring and the second sealing ring are integrally formed.

[0014] In one embodiment, the housing includes a housing body and an annular boss protruding from the inner sidewall of the housing body. The annular boss extends circumferentially along the housing body and surrounds the opening.

[0015] The periphery of the top cover is located on the side of the annular protrusion facing the bottom of the housing, and the periphery of the top cover is spaced apart from the annular protrusion.

[0016] The first sealing ring is at least partially sandwiched between the periphery of the top cover and the annular boss.

[0017] In one embodiment, the first sealing ring includes a first sealing body and a first sealing ring connected to the first sealing body. The first sealing body is elastically connected between the top cover and the second sealing ring, and a portion of the first sealing ring is sandwiched between the annular boss and the top cover.

[0018] In one embodiment, the thickness of the first sealing body is H1, wherein 0.1mm ≤ H1 ≤ 0.7mm.

[0019] In one embodiment, the first sealing ring includes a connecting ring segment and a sealing ring segment. The two ends of the connecting ring segment are respectively connected to the first sealing body and the sealing ring segment, so that the connecting ring segment, the first sealing body and the sealing ring segment together form a groove. The periphery of the top cover is fitted into the groove, and the sealing ring segment elastically abuts against the annular boss.

[0020] In one embodiment, the inner diameter of the sealing ring segment is smaller than the inner diameter of the annular boss.

[0021] In one embodiment, the difference between the inner diameter and the outer diameter of the connecting ring segment is ΔR, where ΔR > 0.5 mm.

[0022] In one embodiment, the initial thickness of the sealing ring segment is H2, wherein 0.5mm ≤ H2 ≤ 1.5mm; and / or,

[0023] The thickness of the compressed sealing ring segment is H3, where 0.1mm ≤ H3 ≤ 0.7mm.

[0024] In one embodiment, the manifold includes a first collector ring having a first side and a second side disposed opposite to each other along a spaced direction between the top and bottom of the housing, the first side elastically abutting against the second sealing ring;

[0025] The outer wall of the housing adjacent to the opening is provided with a groove, the groove having a supporting sidewall adjacent to the opening, the supporting sidewall being welded and fixed to the second side.

[0026] In one embodiment, the support sidewall is provided with a welding area, and the width of the welding area along the radial direction of the first collector ring is K, where K > 1 mm.

[0027] In one embodiment, the housing further includes a core disposed within the housing, the side of the core facing the opening abutting against the sidewall of the groove away from the opening.

[0028] In one embodiment, at least a portion of the sidewall of the groove away from the opening is configured as a clearance ramp to avoid the tabs of the core.

[0029] In one embodiment, the manifold further includes a second collector ring and a connecting ring. The second collector ring is opposite to and spaced apart from the first collector ring. The connecting ring connects the first collector ring and the second collector ring. The second collector ring is welded and fixed to the core. The groove is located between the second collector ring and the first collector ring.

[0030] In one embodiment, the outer diameter of the second collector ring is larger than the outer diameter of the connecting ring; and / or,

[0031] The inner diameter of the first collector ring is larger than the inner diameter of the second sealing ring.

[0032] In one embodiment, the outer diameter of the second collector ring is D1, and the diameter of the core is D2, wherein 50% ≤ D1 / D2 ≤ 95%.

[0033] In one embodiment, the distance between the outer wall of the connecting ring and the bottom wall of the groove along the radial direction of the connecting ring is L1, wherein L1 > 0.3 mm; and / or,

[0034] Along the radial direction of the core, the distance between the outer wall of the second collector ring and the bottom wall of the groove is L2, where L2 > 0.2 mm.

[0035] In one embodiment, the top cover is provided with an annular thinning region.

[0036] In one embodiment, the inner diameters of both the first sealing ring and the second sealing ring are larger than the inner diameter of the annular thinning region.

[0037] Secondly, this application also provides an electrical device, which includes the battery as described above.

[0038] The beneficial effects of the embodiments of this utility model are as follows:

[0039] In this embodiment of the invention, the first sealing ring at least partially abuts against the top cover. Due to its high hardness, the first sealing ring provides stronger support and resistance to deformation, making it less prone to collapse under external pressure or impact, thus effectively preventing external impurities (such as moisture and dust) from entering the battery. The second sealing ring abuts against the busbar on the side opposite to the first sealing ring. Due to its lower hardness, the second sealing ring better adapts to deformation, filling tiny gaps and further improving the sealing effect. The combined action of the first and second sealing rings with different hardnesses can, to a certain extent, disperse stress and strain, extending the service life of the overall sealing component. The high hardness of the first sealing ring allows it to maintain shape stability during long-term use, avoiding sealing failure due to creep or permanent compression deformation. The softer second sealing ring has better elasticity and recovery ability, maintaining good sealing performance even after multiple assembly or disassembly. The high hardness of the first sealing ring makes it easier to fix its position during assembly, reducing the possibility of displacement or misalignment, thereby improving assembly efficiency and accuracy. The second sealing ring is softer, allowing it to better conform to the interface during assembly, ensuring a tight seal and reducing friction during assembly to minimize damage to other components. In high and low temperature environments, the rigid first sealing ring maintains its shape, preventing seal failure due to thermal expansion or contraction; while the soft second sealing ring flexibly adapts to interface changes caused by temperature differences, ensuring stable sealing performance. The sealing section, located within the space enclosed by the busbar, top cover, and housing, and composed of both the first and second sealing rings, effectively prevents electrolyte leakage and the intrusion of external chemicals, enhancing battery safety, reliability, and sealing performance. The sealing section, formed by the first and second sealing rings, effectively prevents electrolyte leakage from inside the battery, avoiding the risk of short circuits or fires caused by leakage. The high hardness of the first sealing ring absorbs some external impact, protecting internal components; the flexibility of the second sealing ring alleviates stress concentration during impacts, thus significantly improving battery sealing performance. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort.

[0041] Figure 1 This is a cross-sectional schematic diagram of a battery (at an angle) provided in an embodiment of this utility model;

[0042] Figure 2 yes Figure 1 A magnified view of part A shown below;

[0043] Figure 3 This is a cross-sectional schematic diagram of the battery (from another angle) provided in an embodiment of this utility model;

[0044] Figure 4 yes Figure 3 A magnified view of part B shown below;

[0045] Figure 5 This is a schematic diagram of the structure of the busbar provided in an embodiment of this utility model.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Battery; 1. Casing; 11. Opening; 12. Casing body; 13. Annular boss; 14. Groove; 141. Supporting sidewall; 15. Sidewall section; 2. Top cover; 21. Annular thinning area; 3. Busbar; 31. First current collector ring; 311. First side; 312. Second side; 32. Second current collector ring; 33. Connecting ring; 5. Sealing part; 51. First sealing ring; 511. First sealing body; 512. First sealing ring; 5121. Connecting ring section; 5122. Sealing ring section; 52. Second sealing ring; 6. Slot; 7. Core. Detailed Implementation

[0048] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0049] In related technologies, cylindrical batteries typically include a casing, a top cover, a busbar, a winding core, and a sealing ring. The busbar and the winding core are both located inside the casing, and the top cover is located at the opening of the casing. A sealing ring with relatively low hardness is sandwiched between the top cover and the casing to seal the gap between the casing and the top cover; however, this sealing effect is relatively poor.

[0050] In view of this, the present invention proposes a battery, Figures 1 to 5 This is a structural schematic diagram of an embodiment of the battery provided by this utility model. The battery provided by this utility model has greatly improved sealing performance. The battery will be described in detail below with reference to the main accompanying drawings.

[0051] Reference Figures 1 to 3 The battery 100 includes a housing 1, a top cover 2, a current collector 3, and a sealing part 5. The top of the housing 1 is provided with an opening 11, and the top cover 2 is provided on the opening 11. The current collector 3 is provided inside the housing 1 and is arranged at intervals with the top cover 2 along the direction from the top to the bottom of the housing 1. The current collector 3, the top cover 2, and the housing 1 together form a placement space. The sealing part 5 is installed in the placement space for sealing connection with the current collector 3, the top cover 2, and the housing 1. The sealing part 5 includes a first sealing ring 51 and a second sealing ring 52 arranged sequentially along the direction from the top to the bottom of the housing 1. The first sealing ring 51 at least partially abuts against the top cover 2, and the side of the second sealing ring 52 away from the first sealing ring 51 abuts against the current collector 3. The hardness of the first sealing ring 51 is greater than the hardness of the second sealing ring 52.

[0052] In this embodiment of the invention, the first sealing ring 51 at least partially abuts against the top cover 2. Due to its high hardness, the first sealing ring 51 provides stronger support and resistance to deformation, making it less prone to collapse under external pressure or impact, thus effectively preventing external impurities (such as moisture and dust) from entering the battery 100. The second sealing ring 52 abuts against the busbar 3 on the side opposite to the first sealing ring 51. Due to its lower hardness, the second sealing ring 52 can better adapt to deformation, fill tiny gaps, and further improve the sealing effect. The combined action of the first sealing ring 51 and the second sealing ring 52, with different hardnesses, can disperse stress and strain to a certain extent, extending the service life of the overall sealing part 5. The high hardness of the first sealing ring 51 allows it to maintain shape stability during long-term use, avoiding sealing failure due to creep or permanent compression deformation. The softer second sealing ring 52 has better elasticity and recovery ability, maintaining good sealing performance even after multiple assembly or disassembly. The high hardness of the first sealing ring 51 makes it easier to fix its position during assembly, reducing the possibility of displacement or misalignment, thereby improving assembly efficiency and accuracy. The second sealing ring 52 is softer, allowing it to better conform to the interface during assembly, ensuring a tight seal and reducing friction during assembly, thus minimizing damage to other components. In high and low temperature environments, the rigid first sealing ring 51 maintains its shape, preventing seal failure due to thermal expansion or contraction; while the soft second sealing ring 52 flexibly adapts to interface changes caused by temperature differences, ensuring a stable sealing effect. The sealing portion 5 is located within the space enclosed by the busbar 3, top cover 2, and housing 1, and is composed of the first sealing ring 51 and the second sealing ring 52. It effectively prevents electrolyte leakage or the intrusion of external chemicals, enhancing the safety, reliability, and sealing performance of the battery 100. The sealing portion 5, composed of the first sealing ring 51 and the second sealing ring 52, effectively prevents electrolyte leakage inside the battery 100, avoiding the risk of short circuits or fires caused by leakage. The high hardness of the first sealing ring 51 absorbs some external impact force, protecting internal components; the flexibility of the second sealing ring 52 alleviates stress concentration during impact, thereby greatly improving the sealing performance of the battery 100.

[0053] In one embodiment, the first sealing ring 51 is made of a perfluoroalkoxy polymer (PFA), which maintains good physical and mechanical properties over a temperature range from extremely low -200°C to extremely high approximately +260°C. This allows it to operate under extreme temperature conditions, ensuring the sealing effectiveness of the seal 5 in both cold outdoor environments and high-temperature operating environments. The low coefficient of friction of PFA helps reduce frictional wear between the seal 5 and other components, extending the service life of the seal 5 and the components it contacts.

[0054] It should be noted that the material of the first sealing ring 51 can also be selected as needed. For example, in other embodiments, the material of the first sealing ring 51 may include at least one of polyurethane, polytetrafluoroethylene, and polyetheretherketone. Specifically, this application does not limit this.

[0055] In one embodiment, the second sealing ring 52 is made of fluororubber, which allows it to maintain its physical and mechanical properties over a wide operating temperature range, typically between -20°C and +250°C, and even withstand short periods of temperatures up to 300°C. This means it can operate effectively in high-temperature environments, providing reliable sealing protection. Fluororubber not only has good tensile strength but also exhibits excellent wear resistance. Compared to other types of rubber, fluororubber has a lower gas permeability, which is particularly important for preventing gas leakage and helps improve the reliability of the entire sealing system.

[0056] It should be noted that the material of the second sealing ring 52 can be selected as needed. For example, in other embodiments, the material of the second sealing ring 52 may also include at least one of silicone rubber, ethylene propylene rubber, polyurethane rubber, polyurethane rubber, and nitrile rubber. Specifically, this application does not limit this.

[0057] In one embodiment, the first sealing ring 51 and the second sealing ring 52 are integrally formed. This integral formation avoids misalignment or gaps that may occur during assembly of the first sealing ring 51 and the second sealing ring 52, thereby improving the integrity and precision of the sealing part 5. The integral formation of the first sealing ring 51 and the second sealing ring 52 better resists deformation caused by external pressure or vibration, reducing the risk of leakage due to sealing part 5 failure. The integral design eliminates the need for separate installation of the first sealing ring 51 and the second sealing ring 52, simplifying the assembly process and reducing operational complexity and time costs. Since the first sealing ring 51 and the second sealing ring 52 are fixed in relationship during manufacturing, their hardness differences and interlayer fit are precisely designed to better achieve the synergistic effect of the double-layer seal, improving the overall sealing effect. The risk of micro-gaps or interface leakage may exist between the independently formed first sealing ring 51 and the second sealing ring 52, while the integral design eliminates this hidden danger, further improving the reliability of the seal. The integral design makes the stress distribution between the first sealing ring 51 and the second sealing ring 52 more uniform, reducing fatigue damage caused by stress concentration during long-term use.

[0058] There are several ways to integrate the first sealing ring 51 and the second sealing ring 52. For example, in some embodiments, the first sealing ring 51 can be injection molded from a material with higher hardness, and then the first sealing ring 51 and a material with lower hardness can be integrally injection molded to form the second sealing ring, thus achieving the integration of the first sealing ring 51 and the second sealing ring 52. In another embodiment, the first sealing ring 51 with higher hardness and the second sealing ring 52 with lower hardness can be bonded together with adhesive and then installed. Specifically, this application does not limit the specific method of integrating the first sealing ring 51 and the second sealing ring 52.

[0059] It should be noted that, in order to improve the sealing performance of the battery 100, in other embodiments, adhesive can also be applied at the contact position between the opening 11 and the sealing part 5 to ensure a seal.

[0060] In one embodiment, the housing 1 includes a housing body 12 and an annular boss 13 protruding from the inner wall of the housing body 12. The annular boss 13 extends circumferentially along the housing body 12 and forms an opening 11. The periphery of the top cover 2 is located on the side of the annular boss 13 facing the bottom of the housing 1, and the periphery of the top cover 2 is spaced apart from the annular boss 13. By ensuring that the first sealing ring 51 is at least partially sandwiched between the periphery of the top cover 2 and the annular boss 13, an effective sealing barrier is formed. Even under extreme conditions (such as high temperature, high pressure, or mechanical impact), it can effectively prevent external substances (such as moisture, dust, etc.) from entering the battery 100. The design of the annular boss 13 allows the first sealing ring 51 to be evenly stressed during compression, avoiding the sealing failure problem caused by local stress concentration. The annular boss 13 not only provides a positioning reference for the sealing ring but also enhances the overall rigidity of the housing 1, helping to resist external pressure and impact and protecting the safety of internal components. The opening 11 formed by the annular boss 13 fits more tightly with the top cover 2, ensuring accurate positioning of the top cover 2 during installation and reducing the risk of leakage caused by improper assembly.

[0061] In one embodiment, the first sealing ring 51 includes a first sealing body 511 and a first sealing ring 512 connected to the first sealing body 511. The first sealing body 511 is elastically connected between the top cover 2 and the second sealing ring 52, and a portion of the first sealing ring 512 is sandwiched between the annular boss 13 and the top cover 2. Thus, the first sealing body 511 primarily provides overall elastic support and fills the small gap between the top cover 2 and the second sealing ring 52; while the first sealing ring 512 is specifically used to fill the larger gap between the annular boss 13 and the top cover 2, ensuring a tighter seal. Due to its elastic properties, the first sealing body 511 can be evenly distributed between the top cover 2 and the second sealing ring 52 during compression, avoiding seal failure caused by localized stress concentration. The sandwiching of the first sealing ring 512 between the annular boss 13 and the top cover 2 further enhances the tightness of the seal. As an intermediate layer, the first sealing body 511 not only provides necessary elastic support but also buffers external impacts to a certain extent, protecting internal components from damage. Furthermore, the presence of the first sealing ring 512 increases the rigidity of the entire sealing system, helping to resist external pressure. The first sealing ring 512 is sandwiched between the annular boss 13 and the top cover 2, ensuring precise positioning of the top cover 2 during installation and reducing the risk of leakage due to improper assembly. The elastic connection characteristics of the first sealing body 511 also facilitate quick position adjustment, ensuring a good seal. The dual protection of the first sealing ring 512 and the first sealing body 511 effectively prevents electrolyte or other internal liquids from leaking outwards, reducing potential safety hazards.

[0062] In one embodiment, the thickness of the first sealing body 511 is H1, where 0.1mm ≤ H1 ≤ 0.7mm. Thus, the thickness H1 of the first sealing body 511 determines its elastic deformation capacity under compression. Within the range of 0.1mm ≤ H1 ≤ 0.7mm, the sealing body can provide sufficient elastic support between the top cover 2 and the second sealing ring 52, while avoiding excessive compression due to excessive thickness or insufficient sealing due to excessive thinness. With the thickness of the first sealing body 511 between 0.1mm and 0.7mm, the sealing body can achieve a relatively uniform pressure distribution, thereby ensuring a tight fit of the entire sealing interface and reducing the existence of micro-gaps.

[0063] If H1 is greater than 0.7mm, excessive pressure may be required during assembly to achieve the desired compression, increasing assembly difficulty; conversely, if H1 is less than 0.1mm, sufficient elastic deformation capacity may be insufficient, leading to a decrease in sealing performance. Therefore, a thickness of 0.1mm to 0.7mm for the first sealing body 511 achieves a good balance between ease of assembly and sealing performance. Within this thickness range, the first sealing body 511 maintains good elasticity and resilience, avoiding both excessive thickness leading to compression difficulties and insufficient thinness resulting in a loss of elasticity. This thickness range also allows the sealing body to withstand repeated compression and recovery during long-term use without permanent deformation or fatigue failure, thus extending its service life. The thickness H1 of the first sealing body 511 determines its supporting role between the top cover 2 and the second sealing ring 52. Within this range, the first sealing body 511 provides sufficient support to prevent loosening of the seal due to external vibration or impact.

[0064] It should be noted that the thickness of the first sealing body 511 can be selected as needed. For example, the thickness of the first sealing body 511 can be 0.1mm, 0.2mm, 0.25mm, 0.3mm, 0.38mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.68mm, or 0.7mm, etc. Specifically, this application does not limit this.

[0065] In one embodiment, the first sealing ring 512 includes a connecting ring segment 5121 and a sealing ring segment 5122. The two ends of the connecting ring segment 5121 are connected to the first sealing body 511 and the sealing ring segment 5122, respectively, so that the connecting ring segment 5121, the first sealing body 511, and the sealing ring segment 5122 together form a groove 6. The periphery of the top cover 2 is fitted into the groove 6, and the sealing ring segment 5122 elastically abuts against the annular boss 13. Thus, the elastic abutment between the sealing ring segment 5122 and the annular boss 13 effectively prevents external substances (such as moisture and dust) from entering the battery 100, and also prevents electrolyte or other internal liquids from leaking outwards. The groove 6 provides a clear positioning reference for the periphery of the top cover 2, enabling precise alignment during installation and reducing the risk of leakage due to improper assembly. The periphery of the top cover 2 can be directly fitted into the groove 6, simplifying the assembly process and reducing operational complexity and time costs. The elastic contact between the sealing ring segment 5122 and the annular boss 13 ensures uniform pressure distribution during compression, preventing seal failure caused by localized stress concentration. The elastic properties of the sealing ring segment 5122 can absorb external impact energy to a certain extent, protecting internal components from damage. Furthermore, the elastic contact between the sealing ring segment 5122 and the annular boss 13 maintains stable sealing performance under extreme temperature conditions (high or low), reducing the risk of seal failure due to temperature changes.

[0066] Reference Figure 2 In one embodiment, the inner diameter of the sealing ring segment 5122 is smaller than the inner diameter of the annular boss 13. This means that during assembly, the sealing ring segment 5122 is forced to expand outward to fit the shape of the annular boss 13. This design generates greater contact pressure between the sealing ring segment 5122 and the annular boss 13, thereby enhancing the sealing effect and effectively preventing external substances (such as moisture, dust, etc.) from entering the battery 100. The smaller inner diameter of the sealing ring segment 5122 ensures that the top cover 2 and the annular boss 13 are always separated by the sealing ring segment 5122, preventing contact between the top cover 2 and the annular boss 13 that could cause wear, and also achieving electrical isolation, thus improving safety.

[0067] Reference Figure 2In one embodiment, the difference between the inner and outer diameters of the connecting ring segment 5121 is ΔR, where ΔR > 0.5 mm. This enhances the rigidity and deformation resistance of the connecting ring segment 5121, enabling it to maintain shape stability under external pressure or vibration. When the difference between the inner and outer diameters of the connecting ring segment 5121 is greater than 0.5 mm, it allows the connecting ring segment 5121 to better resist compressive and tensile stresses during assembly or long-term use, thereby reducing the risk of seal failure due to deformation. Furthermore, a difference between the inner and outer diameters of the connecting ring segment 5121 greater than 0.5 mm creates a more stable transition area between the top cover 2, the first sealing body 511, and the sealing ring segment 5122, ensuring the overall tightness of the sealing system and reducing the problem of loosening of the sealing interface due to deformation of the connecting ring segment 5121. When the difference between the inner and outer diameters of the connecting ring 5121 is greater than 0.5 mm, the pressure from the top cover 2 and the sealing ring 5122 can be transmitted more evenly, avoiding local stress concentration and thus improving sealing performance. A difference greater than 0.5 mm also makes the sealing part 5 less prone to buckling or damage during assembly, ensuring smooth assembly and reducing sealing failures caused by improper assembly. Furthermore, a difference greater than 0.5 mm in the inner and outer diameters of the connecting ring 5121 provides better fatigue resistance, enabling it to withstand repeated compression and recovery during long-term use without easily developing cracks or permanent deformation, thus extending the service life of the sealing part 5.

[0068] It should be noted that the difference between the inner and outer diameters of the connecting ring segment 5121 can be selected as needed. For example, the difference between the inner and outer diameters of the connecting ring segment 5121 can be 0.51mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.78mm, or 0.8mm, etc. Specifically, this application does not impose any limitations on this.

[0069] Furthermore, when the difference between the inner and outer diameters of the connecting ring segment 5121 is less than 0.5 mm, its rigidity and resistance to deformation are significantly reduced. During assembly or long-term use, the connecting ring segment 5121 may buckle, collapse, or undergo permanent deformation due to external pressure, tensile force, or vibration, thereby affecting the overall stability of the sealing part 5. A difference between the inner and outer diameters of the connecting ring segment 5121 of less than 0.5 mm may result in insufficient elastic support, making it difficult to form a uniform pressure distribution. This leads to insufficient contact pressure at the sealing interface, increasing the risk of leakage.

[0070] Reference Figure 2In one embodiment, the initial thickness of the sealing ring segment 5122 is H2, where 0.5mm ≤ H2 ≤ 1.5mm. Within this range, the sealing ring segment 5122 provides sufficient elastic deformation capacity between the top cover 2 and the annular boss 13, while avoiding excessive compression due to excessive thickness or insufficient sealing due to excessive thinness. Within this thickness range, the sealing ring segment 5122 achieves a relatively uniform pressure distribution, ensuring a tight fit across the entire sealing interface and reducing the presence of micro-gaps. Within this thickness range, the sealing ring segment 5122 has sufficient elastic support, effectively preventing external substances (such as moisture and dust) from entering the battery 100, and also preventing leakage of electrolyte or other internal liquids. Within this thickness range, the sealing ring segment 5122 can withstand repeated compression and recovery during long-term use without easily undergoing permanent deformation or fatigue failure, thereby extending its service life. The thickness H2 of the sealing ring segment 5122 determines its supporting role between the top cover 2 and the annular boss 13. Within this range, the sealing ring 5122 provides sufficient support to prevent loosening of the seal due to external vibration or impact. Within a thickness range of 0.5 mm to 1.5 mm, the sealing ring 5122 can adapt to significant temperature variations. Even under extreme temperature conditions (high or low), the sealing ring 5122 maintains good elasticity and sealing performance.

[0071] Furthermore, if H2 is greater than 1.5mm, excessive pressure may be required during assembly to achieve the necessary compression, increasing assembly difficulty; if H2 is less than 0.5mm, sufficient elastic deformation capacity may be insufficient, leading to a decrease in sealing performance. Within a thickness range of 0.5mm to 1.5mm, the material maintains good elasticity and resilience, neither becoming too thick to compress nor losing elasticity due to being too thin. If H2 is greater than 1.5mm, insufficient compression may lead to unstable sealing; if H2 is less than 0.5mm, excessive compression may cause material failure.

[0072] It should be noted that the initial thickness of the sealing ring segment 5122 can be selected as needed. For example, the initial thickness of the sealing ring segment 5122 can be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 1mm, 1.2mm, 1.4mm, or 1.5mm, etc. Specifically, this application does not limit it in this regard.

[0073] The thickness of the compressed sealing ring 5122 is H3, where 0.1mm ≤ H3 ≤ 0.7mm. This controlled thickness H3 within the range of 0.1mm to 0.7mm ensures sufficient elastic deformation capacity for a tight fit, while avoiding material failure due to excessive compression or insufficient sealing due to excessive thinness. Within this thickness range, the sealing ring 5122 can form a uniform pressure distribution between the top cover 2 and the annular boss 13, reducing local stress concentration and improving the sealing effect, effectively preventing external substances (such as moisture and dust) from entering the battery 100. The compressed thickness within this range ensures sufficient filling of the contact surface by the sealing ring 5122, maintaining stable sealing performance, especially under dynamic conditions (such as vibration or temperature changes). Within the compressed thickness range of 0.1mm to 0.7mm, the sealing ring 5122 can withstand repeated compression and recovery during long-term use without permanent deformation or fatigue failure, extending the service life of the sealing part 5. When the compressed thickness H3 is in the range of 0.1mm to 0.7mm, the sealing ring segment 5122 can adapt to large temperature changes. Even under extreme temperature conditions (high or low temperature), its elastic properties remain stable, ensuring a sealing effect.

[0074] Furthermore, when the thickness of the compressed sealing ring segment 5122 is less than 0.1 mm, it is over-compressed, leading to material failure, decreased sealing performance, insufficient structural strength, complicated assembly process, and poor durability. These problems significantly reduce the reliability and service life of the sealing part 5. When the thickness of the compressed sealing ring segment 5122 is greater than 0.7 mm, the compression is insufficient, resulting in inadequate sealing performance, insufficient support force, increased assembly difficulty, poor long-term stability, and increased maintenance costs. These problems also affect the overall performance and reliability of the sealing part 5.

[0075] It should be noted that the thickness of the compressed sealing ring segment 5122 can be selected as needed. For example, the initial thickness of the sealing ring segment 5122 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.64mm, or 0.7mm, etc. Specifically, this application does not limit this.

[0076] Reference Figure 2 , Figure 4 and Figure 5In one embodiment, the manifold 3 includes a first current collector ring 31. The first current collector ring 31 has a first side 311 and a second side 312 disposed opposite to each other along the interval between the top and bottom of the housing 1. The first side 311 elastically abuts against the second sealing ring 52. A groove 14 is provided on the outer side wall of the housing 1 adjacent to the opening 11. The groove 14 has a supporting side wall 141 disposed adjacent to the opening 11, and the supporting side wall 141 is welded and fixed to the second side 312. In this way, the elastic abutment between the first current collector ring 31 and the second sealing ring 52 can achieve uniform pressure distribution during compression, avoiding the sealing failure problem caused by local stress concentration. The second side 312 of the first current collector ring 31 is welded and fixed to the supporting side wall 141 of the groove 14 on the housing 1, which not only enhances the rigidity of the entire battery 100 structure, but also provides stable support for the first current collector ring 31, helping to resist external pressure and impact and protect the safety of internal components. The welding and fixing between the first collector ring 31 and the support side wall 141 of the groove 14 ensures accurate positioning during installation and reduces the risk of leakage caused by improper assembly.

[0077] To improve the sealing performance of the battery 100, adhesive can be applied to the groove opening of the groove 14 to enhance the sealing performance. However, this application does not specify the exact method.

[0078] Reference Figure 4 In one embodiment, the support sidewall 141 is provided with a welding area, the width of which is K along the radial direction of the first current collector ring 31, where K > 1 mm. This provides a larger welding contact area, thereby increasing the bonding strength of the weld point between the first current collector ring 31 and the support sidewall 141. This helps ensure a more robust connection between the first current collector ring 31 and the support sidewall 141 of the housing 1, reducing the risk of loosening or breakage due to external stresses (such as vibration or impact). The wider welding area can withstand greater shear forces and provides better fatigue resistance, improving the lifespan of the battery 100. A welding area width greater than 1 mm not only enhances the strength of the weld point itself but also provides stronger support for the first current collector ring 31, helping to resist external pressure and impacts and protecting the safety of internal components. The wider welding area can evenly distribute stress in the welding area, avoiding localized stress concentration, thereby reducing the risk of crack propagation or material failure due to stress concentration.

[0079] Furthermore, a weld width of 1 mm or less means a very small weld area, significantly reducing the bond strength between the support sidewall 141 and the first collector ring 31. This design can easily lead to an insufficiently strong weld connection, which may loosen or even break under external stress (such as vibration, impact, or thermal expansion). When the weld width is less than or equal to 1 mm, the weld area cannot provide sufficient shear resistance, especially under dynamic conditions (such as vibration during vehicle operation), and the weld between the support sidewall 141 and the first collector ring 31 may fail due to repeated stress.

[0080] It should be noted that the width of the welding area can be selected as needed. For example, the width of the welding area can be 1.1mm, 1.5mm, 2mm, 2.5mm, 3mm, or 4mm, etc. Specifically, this application does not limit this.

[0081] In one embodiment, the housing 1 has a sidewall segment 15 disposed opposite to the side of the sealing part 5. The connection between the sidewall segment 15 and the supporting sidewall 141 is an arc transition, and the radius of the arc is greater than 0.2 mm. This arc transition design effectively reduces friction and interference between the sealing part 5 and the inner wall of the housing 1 during installation. The arc radius greater than 0.2 mm makes it easier for the sealing part 5 to slide into place, avoiding jamming caused by sharp angles or small radii. The arc transition effectively disperses stress, especially in areas prone to stress concentration at the connection. Compared to sharp corners, the arc transition allows for a more uniform stress distribution, reducing local stress concentration and thus enhancing the overall strength and durability of the sealing part structure.

[0082] In one embodiment, the battery 100 further includes a core 7 disposed within the housing 1, with the side of the core 7 facing the opening 11 abutting against the sidewall of the groove 14 away from the opening 11. This effectively prevents the core 7 from shifting or shaking within the battery 100, ensuring that the core 7 maintains a stable position even under external vibration or impact, thereby protecting the electrodes and separator from mechanical damage. The abutment design between the core 7 and the sidewall of the groove 14 provides a clear reference point for positioning the core 7 during assembly, reducing the need for additional positioning devices, simplifying the assembly process, and improving production efficiency. The contact between the core 7 and the sidewall of the groove 14 increases the heat conduction path, helping to transfer the heat generated by the core 7 to the housing 1 more quickly and dissipate it through the surface of the housing 1, thus effectively preventing overheating of the core 7. Because heat can be more evenly distributed through the contact surface, the temperature gradient inside the core 7 is reduced, which helps to extend the lifespan of the battery 100 and improve its performance consistency.

[0083] Reference Figure 1 and Figure 3A gap can be provided between the side of the core 7 facing the opening 11 and the side wall of the groove 14 away from the opening 11. This can prevent physical interference or friction between the two during assembly, thereby reducing assembly difficulty and improving assembly efficiency. The gap provides more operating space for the core 7, facilitating precise alignment and installation, and reducing the risk of damage due to improper assembly. The gap between the core 7 and the side wall of the groove 14 can also act as a buffer, allowing the core 7 some deformation space when subjected to external pressure or internal expansion, thereby reducing material fatigue or failure caused by excessive compression.

[0084] In one embodiment, at least part of the sidewall of the groove 14 away from the opening 11 is configured as a clearance ramp to avoid the tabs of the core 7. Since the tabs of the core 7 typically extend from the core 7 body and connect to the busbar 3 or other electrical components, if the sidewall of the groove 14 does not have a clearance ramp, the tabs may physically interfere with or be squeezed against the sidewall of the groove 14, affecting assembly. By providing a clearance ramp, this spatial conflict can be effectively avoided, ensuring that the tabs can be placed smoothly without obstruction. The clearance ramp design allows the internal components of the battery 100 to be arranged more compactly within a limited space, potentially increasing the energy density of the battery 100 or reducing its overall size, which is beneficial for the miniaturization and lightweight design of the battery 100. The clearance ramp provides a clear clearance path for the tabs, reducing the need to adjust the tab position during assembly, simplifying the assembly steps, and improving assembly efficiency. Due to the presence of the clearance ramp, operators do not need to handle the position of the tabs with special care when installing the core 7, reducing assembly difficulty and the risk of damage due to improper operation. The beveled surface prevents the tabs from being subjected to unnecessary compression or friction during assembly, protecting their structural integrity. This is crucial for maintaining good electrical contact and reducing contact resistance.

[0085] The avoidance ramp design helps ensure stable contact between the tab and other electrical components (such as busbar 3), avoiding poor electrical connection problems caused by tab deformation or misalignment, and improving the reliability and consistency of electrical connections. If the tab is in direct contact with the sidewall of the groove 14, especially under high voltage conditions, it may pose a short-circuit risk. The avoidance ramp design effectively prevents this from happening, improving the safety of the battery 100.

[0086] Reference Figure 2 , Figure 4 and Figure 5In one embodiment, the busbar 3 further includes a second current collector ring 32 and a connecting ring 33. The second current collector ring 32 is positioned opposite and spaced apart from the first current collector ring 31. The connecting ring 33 connects the first current collector ring 31 and the second current collector ring 32. The second current collector ring 32 is welded and fixed to the core 7. The groove 14 is located between the second current collector ring 32 and the first current collector ring 31. Thus, the first current collector ring 31 is welded and fixed to the supporting sidewall 141 of the groove 14, and the second current collector ring 32 is welded and fixed to the core 7. This design ensures that the busbar 3 is securely installed, guaranteeing that the current can be evenly distributed within the battery 100 and reducing the risk of localized overload. The direct welding and fixing of the second current collector ring 32 to the core 7 provides a more direct and stable electrical path, avoiding voltage drop or resistance increase problems caused by poor contact, and improving the overall electrical performance of the battery 100. The dual current collector ring design allows current to be conducted through multiple paths, helping to disperse heat and preventing single-point overheating. The connecting ring 33 not only serves as a physical connection, but also acts as an additional heat dissipation channel, helping to transfer the heat generated by the core 7 to the housing 1 more quickly and dissipate it through the surface of the housing 1, further enhancing the heat dissipation efficiency.

[0087] Reference Figure 2 In one embodiment, the outer diameter of the second current collector ring 32 is larger than that of the connecting ring 33. This means the second current collector ring 32 has a larger surface area and cross-sectional area. This design reduces resistance when current flows through, decreases energy loss, and improves the overall electrical performance of the battery 100. The larger outer diameter allows the second current collector ring 32 to be better welded and fixed to the winding core 7, and provides a more uniform current distribution path, avoiding heat generation problems caused by local overload or current concentration. The larger outer diameter of the second current collector ring 32 provides additional mechanical support, enhancing its stability within the housing 1, especially under external vibration or impact, effectively preventing displacement of the winding core 7 or other components. The larger outer diameter of the second current collector ring 32 increases its contact area with the surrounding environment, helping to conduct the heat generated by the winding core 7 to the surface of the housing 1 more quickly, thereby improving heat dissipation efficiency and preventing local overheating.

[0088] Reference Figure 2 In one embodiment, the inner diameter of the first collector ring 31 is larger than the inner diameter of the second sealing ring 52. This allows the second sealing ring 52 to separate the first collector ring 31 from the top cover 2, ensuring no direct metal-to-metal contact between them and thus avoiding the risk of electrical short circuits due to accidental contact. Additionally, it prevents electrical short circuits caused by metal debris generated from wear and tear between the first collector ring 31 and the top cover 2 due to vibration.

[0089] In one embodiment, the outer diameter of the second current collector 32 is D1, and the diameter of the winding core 7 is D2, wherein 50% ≤ D1 / D2 ≤ 95%. Thus, the ratio of the outer diameter D1 of the second current collector 32 to the diameter D2 of the winding core 7 is within the range of 50% to 95%, ensuring that the second current collector 32 is neither too large and occupying too much space, nor too small and causing current path limitations. This design helps achieve higher energy density within a limited space. Within this ratio range, the second current collector 32 can better fit with the winding core 7, avoiding space waste or assembly difficulties caused by size mismatch, thereby improving the internal space utilization of the battery 100. When the ratio of the outer diameter D1 of the second current collector 32 to the diameter D2 of the winding core 7 is within the range of 50% to 95%, the second current collector 32 can provide a larger conductive area, reducing resistance when current flows, reducing energy loss, and improving the overall electrical performance of the battery 100. Within this ratio range, the second current collector 32 can form a more uniform contact and current distribution path with the winding core 7, avoiding heat generation problems caused by local overload or current concentration. Within this ratio range, the second current collector ring 32 can distribute heat more evenly, reduce the formation of heat concentration points, further improve the thermal management performance of the battery 100, and extend the service life of the battery 100. The ratio of the outer diameter D1 of the second current collector ring 32 to the diameter D2 of the core 7 within this range provides sufficient mechanical support for the core 7, preventing displacement or shaking of the core 7 when subjected to external vibration or impact, thereby protecting the electrodes and separator from mechanical damage. A ratio of the outer diameter D1 of the second current collector ring 32 to the diameter D2 of the core 7 within the range of 50% to 95% allows the second current collector ring 32 to evenly distribute stress caused by external pressure or internal expansion, reducing local stress concentration and lowering the risk of material fatigue or failure due to long-term use.

[0090] Furthermore, when D1 / D2 < 50%, the conductive area of ​​the second current collector ring 32 will be insufficient, thermal management performance will be limited, structural stability will decrease, and assembly difficulty will increase. When D1 / D2 > 95%, there are problems such as unreasonable space utilization of the second current collector ring 32, redundant current paths, obstructed heat dissipation paths, and increased risk of deformation.

[0091] It should be noted that the value of D1 / D2 can be selected as needed. For example, the value of D1 / D2 can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 95%, etc. Specifically, this application does not limit this.

[0092] Reference Figure 4In one embodiment, the distance between the outer wall of the connecting ring 33 and the bottom wall of the groove 14 along the radial direction of the connecting ring 33 is L1, where L1 > 0.3 mm. Setting L1 > 0.3 mm ensures that the connecting ring 33 will not physically interfere or rub against the bottom wall of the groove 14 during installation, avoiding assembly difficulties or damage risks caused by contact. This makes the assembly process smoother and reduces the need for adjustment and calibration. Setting L1 > 0.3 mm provides a larger operating space between the outer wall of the connecting ring 33 and the bottom wall of the groove 14, facilitating precise alignment and installation, reducing assembly difficulty, and improving production efficiency. Maintaining a certain distance between the connecting ring 33 and the bottom wall of the groove 14 avoids localized stress concentration caused by direct contact, extending the service life of the battery 100. L1 > 0.3 mm can also act as a buffer, allowing the connecting ring 33 some deformation space when subjected to external pressure or internal expansion, thereby reducing material fatigue or failure caused by excessive compression.

[0093] Furthermore, when L1 ≤ 0.3 mm, the gap between the connecting ring 33 and the bottom wall of the groove 14 is very small, which may lead to interference or friction during assembly. This significantly increases the assembly difficulty, prolongs the assembly time, and may require higher precision equipment or more complex operating procedures. When L1 ≤ 0.3 mm, the connecting ring 33 or the groove 14 may be squeezed or scratched during assembly, thereby affecting its performance or leading to an increased scrap rate. A gap of less than or equal to 0.3 mm between the connecting ring 33 and the bottom wall of the groove 14 makes it easier for them to come into direct contact under stress, thereby causing local stress concentration. This stress concentration may accelerate material fatigue and reduce the service life of the battery 100. During the use of the battery 100, the connecting ring 33 may undergo slight deformation due to internal pressure changes (such as electrolyte expansion) or external environment (such as vibration, impact, etc.). If the gap is too small, this deformation may be restricted, leading to component deformation or even failure.

[0094] It should be noted that the distance between the outer wall of the connecting ring 33 and the bottom wall of the groove 14 can be 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, or 0.7mm, etc. Specifically, this application does not limit this.

[0095] Reference Figure 4In one embodiment, the distance between the outer wall of the second current collector ring 32 and the bottom wall of the groove 14 along the radial direction of the core 7 is L2, where L2 > 0.2 mm. Setting L2 > 0.2 mm ensures that the second current collector ring 32 will not physically interfere or rub against the bottom wall of the groove 14 during installation, avoiding assembly difficulties or damage risks caused by contact. This makes the assembly process smoother and reduces the need for adjustment and calibration. The distance between the outer wall of the second current collector ring 32 and the bottom wall of the groove 14 is greater than 0.2 mm, providing more operating space for precise alignment and installation of the busbar 3, reducing assembly difficulty and improving production efficiency. The distance between the second current collector ring 32 and the bottom wall of the groove 14 is greater than 0.2 mm, avoiding localized stress concentration caused by direct contact, especially under dynamic conditions (such as vibration or impact). This design helps to disperse stress and extend the service life of the battery 100. The distance between the second collecting ring 32 and the bottom wall of the groove 14 is greater than 0.2 mm, which can play a buffering role to a certain extent, allowing the second collecting ring 32 to have a certain deformation space when subjected to external pressure or internal expansion, thereby reducing material fatigue or failure caused by excessive extrusion.

[0096] Furthermore, when the distance between the second current collector ring 32 and the bottom wall of the groove 14 is less than 0.2 mm, physical interference or friction can easily occur between them during assembly, increasing the assembly difficulty. Operators need higher precision to avoid contact between components, which may lead to longer assembly time and increased operational complexity. A distance of less than 0.2 mm between the second current collector ring 32 and the bottom wall of the groove 14 makes it easier to damage either the second current collector ring 32 or the bottom wall of the groove 14 during assembly, especially if there are any minor dimensional deviations or assembly errors, which may result in scratches, deformation, or other forms of damage to the components. A distance of less than 0.2 mm between the second current collector ring 32 and the bottom wall of the groove 14 also makes it easier for them to come into direct contact under stress, leading to localized stress concentration. This stress concentration may accelerate material fatigue and reduce the lifespan of the battery 100.

[0097] It should be noted that the distance between the outer wall of the second collector ring 32 and the bottom wall of the groove 14 can be set as needed. For example, the distance between the outer wall of the second collector ring 32 and the bottom wall of the groove 14 can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, or 0.7mm, etc. Specifically, this application does not limit this.

[0098] Reference Figure 2 and Figure 4In one embodiment, the top cover 2 is provided with an annular thinning region 21. When the battery 100 experiences thermal runaway, the internal temperature rises sharply, causing the electrolyte to decompose and generate a large amount of gas, forming a high-pressure environment. The annular thinning region 21, as a pre-designed weak point, can preferentially rupture when a certain pressure is reached, thereby safely releasing the internal pressure and preventing the battery 100 casing 1 from bursting or exploding due to excessive pressure. The annular thinning region 21 can rupture rapidly in the early stages of thermal runaway, releasing the internal pressure in a timely manner and preventing the further accumulation of high-temperature gas and substances, thereby delaying or even preventing the spread of thermal runaway.

[0099] It should be noted that there are multiple ways to form the thinning region 21. For example, an annular groove can be formed on the top cover 2. Specifically, this application does not limit the shape of the cross-section of the annular groove. For example, the cross-section of the annular groove can be trapezoidal, square, or semi-circular. Specifically, this application does not limit this aspect.

[0100] Reference Figure 2 In one embodiment, the inner diameters of both the first sealing ring 51 and the second sealing ring 52 are larger than the inner diameter of the annular thinning region 21. Thus, the annular thinning region 21 is a critical component designed to rupture and release internal pressure in the event of thermal runaway of the battery 100. If the inner diameters of the first sealing ring 51 and the second sealing ring 52 are smaller than the inner diameter of the annular thinning region 21, the sealing rings may partially cover the annular thinning region 21, hindering its rupture and pressure release in an emergency. Therefore, setting the inner diameters of both the first sealing ring 51 and the second sealing ring 52 to be larger than the inner diameter of the annular thinning region 21 ensures that the annular thinning region 21 can rupture smoothly and effectively release pressure in the event of thermal runaway, avoiding the risk of the battery 100 casing 1 rupturing or exploding.

[0101] Secondly, the embodiments of this utility model also propose an electrical device, which includes the battery 100 as described above. The specific structure of the battery 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0102] It should be noted that the electrical equipment can be vehicles, energy storage power supplies, consumer electronics, medical equipment, or smart cities, etc. Specifically, this application does not limit this.

[0103] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery, characterized by, include: A housing, wherein an opening is provided at the top of the housing; A top cover is provided over the opening; A manifold is disposed inside the housing and is spaced apart from the top cover along the direction from the top to the bottom of the housing. The manifold, the top cover, and the housing together enclose a placement space. A sealing part is installed in the placement space for sealing connection with the manifold, the top cover and the housing. The sealing part includes a first sealing ring and a second sealing ring connected sequentially along the top to the bottom of the housing. The first sealing ring at least partially abuts against the top cover, and the side of the second sealing ring opposite to the first sealing ring abuts against the manifold. The hardness of the first sealing ring is greater than that of the second sealing ring.

2. The battery of claim 1, wherein, The material of the first sealing ring includes a perfluoroalkoxy polymer; and / or, The material of the second sealing ring includes fluororubber; and / or, The first sealing ring and the second sealing ring are integrally formed.

3. The battery of claim 1, wherein, The shell includes a shell body and an annular boss protruding from the inner sidewall of the shell body. The annular boss extends circumferentially along the shell body and forms the opening. The periphery of the top cover is located on the side of the annular protrusion facing the bottom of the housing, and the periphery of the top cover is spaced apart from the annular protrusion. The first sealing ring is at least partially sandwiched between the periphery of the top cover and the annular boss.

4. The battery of claim 3, wherein, The first sealing ring includes a first sealing body and a first sealing ring connected to the first sealing body. The first sealing body is elastically connected between the top cover and the second sealing ring, and a portion of the first sealing ring is sandwiched between the annular boss and the top cover.

5. The battery of claim 4, wherein, The thickness of the first sealing body is H1, wherein 0.1mm≤H1≤0.7mm.

6. The battery of claim 4, wherein, The first sealing ring includes a connecting ring segment and a sealing ring segment. The two ends of the connecting ring segment are respectively connected to the first sealing body and the sealing ring segment, so that the connecting ring segment, the first sealing body and the sealing ring segment together form a groove. The periphery of the top cover is fitted into the groove, and the sealing ring segment elastically abuts against the annular boss.

7. The battery of claim 6, wherein, The inner diameter of the sealing ring segment is smaller than the inner diameter of the annular boss.

8. The battery of claim 6, wherein, The difference between the inner and outer diameters of the connecting ring segment is ΔR, where ΔR > 0.5 mm.

9. The battery of claim 6, wherein, The initial thickness of the sealing ring segment is H2, wherein 0.5mm ≤ H2 ≤ 1.5mm; and / or, The thickness of the compressed sealing ring segment is H3, where 0.1mm ≤ H3 ≤ 0.7mm.

10. The battery according to any one of claims 1 to 9, characterized in that, The manifold includes a first collector ring, which has a first side and a second side that are disposed opposite to each other along the spaced direction between the top and bottom of the housing, and the first side elastically abuts against the second sealing ring. The outer wall of the housing adjacent to the opening is provided with a groove, the groove having a supporting sidewall adjacent to the opening, the supporting sidewall being welded and fixed to the second side.

11. The battery of claim 10, wherein, The support sidewall is provided with a welding area, and the width of the welding area along the radial direction of the first collector ring is K, where K > 1 mm.

12. The battery of claim 10, wherein, It also includes a core, which is disposed within the housing, and the side of the core facing the opening abuts against the side wall of the groove away from the opening.

13. The battery of claim 12, wherein, The sidewall of the groove away from the opening is at least partially configured as a clearance ramp, which is used to avoid the tabs of the core.

14. The battery of claim 12, wherein, The manifold further includes a second collector ring and a connecting ring. The second collector ring is opposite to and spaced apart from the first collector ring. The connecting ring connects the first collector ring and the second collector ring. The second collector ring is welded and fixed to the core. The groove is located between the second collector ring and the first collector ring.

15. The battery of claim 14, wherein, The outer diameter of the second collector ring is larger than the outer diameter of the connecting ring; and / or, The inner diameter of the first collector ring is larger than the inner diameter of the second sealing ring.

16. The battery of claim 14, wherein, The outer diameter of the second collector ring is D1, and the diameter of the core is D2, wherein 50% ≤ D1 / D2 ≤ 95%.

17. The battery of claim 14, wherein, Along the radial direction of the connecting ring, the distance between the outer wall of the connecting ring and the bottom wall of the groove is L1, where L1 > 0.3 mm; and / or, Along the radial direction of the core, the distance between the outer wall of the second collector ring and the bottom wall of the groove is L2, where L2 > 0.2 mm.

18. The battery of any one of claims 1 to 9, wherein, The top cover is provided with an annular thinning area.

19. The battery of claim 18, wherein, The inner diameters of both the first and second sealing rings are larger than the inner diameter of the annular thinning region.

20. An electrical device, comprising: Includes the battery as described in any one of claims 1 to 19.

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