Spherical battery and electric equipment

Abstract

The invention relates to the technical field of batteries, and discloses a spherical battery and electric equipment, and the spherical battery comprises a shell, a stand column and a conductive part. Wherein a containing cavity is formed in the shell, and a roll core is arranged in the containing cavity; the stand column is arranged in the containing cavity, a cavity separated from the containing cavity is formed in the stand column, at least one end of the stand column penetrates through the shell and is provided with a first opening, and the cavity is communicated with the first opening; and the conductive piece is arranged in the cavity and is electrically connected with the roll core. According to the spherical battery provided by the invention, the upright post with the cavity is arranged in the accommodating cavity of the shell, and the conductive piece electrically connected with the roll core is arranged in the cavity of the upright post, so that additional occupation of exposed contact points of the spherical battery on a mounting space can be effectively avoided, and the compactness of the overall structure of the spherical battery is improved. In addition, the built-in conductive piece and the connection point thereof can be protected by the shell and the stand column, and the exposed conductive piece is effectively prevented from being in contact with other structures to cause short circuit.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a spherical battery and an electrical device thereof. Background Technology

[0002] In some special application scenarios, square or cylindrical batteries are often limited by their shape and structure, making it difficult to make efficient use of space. Therefore, spherical batteries have emerged to meet special design and usage requirements.

[0003] In related technologies, the contact points for charging and discharging connections between spherical batteries and external devices are usually located on the outer surface or end of the spherical shell. This arrangement not only occupies additional installation space for the spherical battery and affects the overall structural compactness, but the exposed contact points are also prone to short circuits due to contact with other structures, affecting the normal use of the spherical battery. Summary of the Invention

[0004] This application provides a spherical battery and an electrical device to solve or improve the problem of exposed contact points in spherical batteries.

[0005] In a first aspect, this application provides a spherical battery, including a casing, a post, and a conductive element. The casing has an internal cavity containing a winding core; the post is disposed within the cavity, and the post has an internal cavity separated from the cavity; at least one end of the post passes through the casing and has a first opening, the cavity communicating with the first opening; the conductive element is disposed within the cavity and is electrically connected to the winding core.

[0006] Beneficial Effects: The spherical battery provided in this application, by setting a column with a cavity within the housing cavity, and by placing a winding core within the housing cavity, and placing the conductive component electrically connected to the winding core within the cavity of the column, shifts the contact point for electrical connection between the spherical battery and external devices from the traditional outer surface or end to the cavity inside the column. This effectively avoids the additional space occupied by exposed contact points of the spherical battery, improving the overall compactness of the spherical battery structure. Furthermore, the built-in conductive component and its connection point are protected by the housing and column, effectively preventing short circuits caused by contact between exposed conductive components and other structures. Simultaneously, protecting the exposed contact points also prevents physical collisions between the contact points and external structures, preventing damage to the contact points and effectively improving the reliability and durability of the spherical battery during use. In addition, the cavity of the column can be adapted to the plug of external electrical equipment, facilitating the insertion of the external electrical equipment plug into the cavity for assembly and connection with the spherical battery.

[0007] In one alternative embodiment, the core is wound around the column, and the core has a first positive tab and a first negative tab, which are electrically connected to different positions of the conductive element.

[0008] Beneficial effects: The core is wound around the column as an axis, which stabilizes the core structure inside the spherical battery. By connecting the first positive tab and the first negative tab to the conductive component set in the cavity, it is possible to avoid setting protrusions or end cap-type contact points separately on the surface of the spherical battery casing. This allows the casing of the spherical battery to remain intact and smooth, improves the compactness of the overall structure of the spherical battery, and protects the conductive component.

[0009] In one alternative embodiment, a plurality of cores are provided, and the plurality of cores are spaced upward along the axial direction of the column.

[0010] Beneficial effects: By arranging multiple cores within the housing cavity and separating them along the axial direction of the column, short circuits between adjacent cores are prevented. Simultaneously, increasing the number of cores within the housing cavity improves space utilization, thereby enhancing the capacity and energy density of the spherical battery. This, in turn, strengthens the power output of the spherical battery, giving it the advantage of high efficiency in specific applications.

[0011] In one optional embodiment, a second positive tab is provided in the receiving cavity, and the first positive tabs of the plurality of winding cores are all electrically connected to the second positive tab, and the second positive tab is electrically connected to the conductive element; and / or, a second negative tab is provided in the receiving cavity, and the first negative tabs of the plurality of winding cores are all electrically connected to the second negative tab, and the second negative tab is electrically connected to the conductive element.

[0012] Beneficial effects: When multiple coils are arranged within the housing cavity, by setting a second positive tab and / or a second negative tab as an intermediate current collector within the housing cavity, the tabs of multiple coils can be first gathered together and then connected to the conductive component. This facilitates the connection between multiple coils and the conductive component, reducing the manufacturing difficulty of the spherical battery. Simultaneously, by setting a second positive tab and / or a second negative tab, the connection strength between the first positive tab and / or the first negative tab of the coil and the conductive component can be indirectly improved, thereby enhancing the electrical connection reliability of the spherical battery under vibration and shock environments.

[0013] In one alternative embodiment, an isolation ring is provided inside the receiving cavity. The isolation ring is sleeved and connected to the outside of the column and located between two adjacent winding cores. The isolation ring is used to separate the two adjacent winding cores.

[0014] Beneficial effects: By setting isolation rings between adjacent cores, the isolation rings physically separate them. When the cores expand during charging and discharging or are displaced by external impacts, the isolation rings effectively prevent adjacent cores from contacting, thereby reducing the risk of internal short circuits in the spherical battery. Simultaneously, the isolation rings can be used as a positioning structure when assembling multiple cores, ensuring precise axial positioning of the cores on the column, thus improving the assembly efficiency and quality of the spherical battery.

[0015] In one alternative embodiment, the isolation ring is provided with a plurality of openings, the first positive electrode tab of the winding core is inserted through one of the openings, and the first negative electrode tab of the winding core is inserted through another opening.

[0016] Beneficial effects: By opening a port on the isolation ring for the first positive and first negative tabs to pass through, the port not only facilitates the connection of multiple first positive tabs to conductive components and multiple first negative tabs to conductive components, but also restricts the extension direction of the first positive and first negative tabs. During core assembly and subsequent use, this effectively prevents the first positive and first negative tabs from shifting, bending, or rubbing against adjacent components, which could lead to damage or short circuit risks.

[0017] In one alternative embodiment, the housing includes an outer shell and a cover. The outer shell is fitted over the outside of the core and is connected to the isolation ring. A second opening is provided between an end of the outer shell and an end of the column. The cover is closed over the second opening and is sealed to the outer shell and the column.

[0018] Beneficial effects: The casing is formed by assembling an outer shell and a cap. During the fabrication of the spherical battery, the core can be installed onto the pillar first, followed by the outer shell and cap, facilitating the overall assembly of the spherical battery. Simultaneously, the cap is positioned at the second opening and is sealed to the outer shell and pillar, creating a reliable sealing interface at the second opening. This ensures the sealing performance of the spherical battery's cavity and extends its lifespan.

[0019] In one alternative embodiment, the outer shell includes a plurality of annular shells arranged along the axial direction of the outer shell, with an isolation ring disposed between two adjacent annular shells, and the cap disposed at the end of the outermost annular shell; the annular shells, the isolation rings, and the cap are interconnected to form the outer shell having a connecting arc-shaped outer surface.

[0020] Beneficial effects: By disassembling the outer casing into multiple annular shells and setting isolation rings between adjacent annular shells, the annular shells and the pillars are connected by the isolation rings and the cap, forming an integral structure. Furthermore, the annular shells are easier to process as independent structures, and the combination of multiple annular shells facilitates the formation of the outer surface of a spherical battery.

[0021] In one optional embodiment, the annular shell is provided with a liquid injection port, and a sealing element is provided inside the liquid injection port.

[0022] Beneficial effects: By placing the injection port on the annular shell, and when there are multiple annular shells, multiple injection ports can be provided on the outer shell. These multiple injection ports allow for injection into different areas of the receiving cavity, ensuring the electrolyte fills the cavity and meets usage requirements. After injection, the injection ports are sealed using a sealing component to guarantee the sealing performance of the outer shell.

[0023] In one optional embodiment, the conductive element includes a first connecting portion and a second connecting portion, both of which are disposed on the inner sidewall of the column; the first connecting portion is electrically connected to the first positive electrode tab, and the second connecting portion is electrically connected to the first negative electrode tab.

[0024] Beneficial effects: By integrating the first and second connecting parts onto the inner wall of the column, and electrically connecting the first and second connecting parts to the first positive and first negative electrodes respectively, the first and second connecting parts do not need to occupy additional space on the outer surface of the spherical battery, thus improving the overall compactness of the spherical battery structure. Furthermore, the built-in first and second connecting parts are protected by the casing and the column, effectively preventing short circuits caused by contact between exposed conductive parts and other structures, and avoiding physical collisions between the first and second connecting parts and external structures, preventing damage to the first and second connecting parts, and effectively improving the reliability and durability of the spherical battery during use.

[0025] Secondly, this application also provides an electrical device, including a connector and the aforementioned spherical battery, wherein the connector extends into the cavity of the column and is electrically connected to the conductive element.

[0026] Beneficial effects: The connector of this electrical device can extend into the cavity of the column, making the overall structure formed by the connector and the spherical battery compact and convenient for use. At the same time, the cavity of the column also serves as a guide, facilitating the connector of the electrical device to extend into the cavity and connect with the conductive parts, thereby facilitating the connection between the connector and the spherical battery. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a perspective view of a spherical battery according to an embodiment of this application;

[0029] Figure 2 for Figure 1 A schematic diagram of the decomposition process; Figure 3 for Figure 1 Top view; Figure 4 for Figure 3 Sectional view at point AA; Figure 5 This is a schematic diagram showing the positional relationship between the isolation ring and the port in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures: 1. Shell; 100. Receiving cavity; 110. Second opening; 101. Outer shell; 1011. Annular shell; 102. Cover; 2. Core; 201. First positive electrode tab; 202. First negative electrode tab; 203. Main body; 3. Column; 300. Cavity; 310. First opening; 4. Conductive component; 401. First connecting part; 402. Second connecting part; 5. Second positive electrode tab; 6. Second negative electrode tab; 7. Isolation ring; 8. Inlet; 9. Injection port; 10. Sealing element. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The following is combined with Figures 1 to 5 This describes an embodiment of the present application.

[0033] According to embodiments of this application, in a first aspect, this application provides a spherical battery. A single spherical battery can be used as an independent unit. In scenarios requiring higher voltage or capacity, multiple spherical batteries can be connected in parallel or series to form a battery module. The spherical battery includes a casing 1, a core 2, a pillar 3, and a conductive component 4. The casing 1 is approximately spherical, but its shape can also be approximated as an ellipsoid or other similar closed rotating body structure. The casing 1 can be made of metallic materials or polymer composite materials, and it has good sealing performance to isolate the internal environment of the casing 1 from the external environment.

[0034] like Figure 4 As shown, the housing 1 has a receiving cavity 100 inside, and a core 2 is disposed inside the receiving cavity 100. The core 2, as the core of the spherical battery, is typically a body 203 formed by winding or stacking a positive electrode sheet, a negative electrode sheet, and a separator spaced between them. Taking the core 2 as an example formed by winding, the core 2 has a first positive electrode tab 201 and a first negative electrode tab 202 extending along its winding axis. It is understood that the specific structure, materials, and manufacturing process of the core 2 in this embodiment can adopt the technology of lithium-ion batteries, sodium-ion batteries, or other types of secondary batteries known in the art, and will not be described in detail here. A column 3 is disposed inside the receiving cavity 100, and the column 3 has a cavity 300 separated from the receiving cavity 100. At least one end of the column 3 passes through the housing 1 and is provided with a first opening 310. The cavity 300 communicates with the first opening 310. A conductive element 4 is disposed inside the cavity 300 and is electrically connected to the core 2.

[0035] In this embodiment, as Figure 2 , Figure 4 As shown, the interior of the column 3 has a cavity 300, which is separated from the receiving cavity 100 of the housing 1 by the wall of the column 3. That is, the cavity 300 is an internal cavity independent of the space where the core 2 is located. At least one end of the column 3 extends out of the receiving cavity 100, and the end of the column 3 that protrudes from the housing 1 is provided with a first opening 310, which allows the cavity 300 to communicate with the external environment of the spherical battery. Specifically, the first opening 310 can be provided at at least one end of the housing 1, or the position of the first opening 310 can be adaptively adjusted according to actual needs, such as being provided on the side wall of the housing 1 or other positions. The following description uses the example of both ends of the column 3 protruding from the housing 1 and both ends of the column 3 being provided with the first opening 310 to facilitate electrical connection from both ends of the column 3 as an example.

[0036] like Figure 3 , Figure 4 As shown, the conductive element 4 is disposed in the cavity 300. The conductive element 4 can be fixed to the inner wall of the cavity 300 by means of insert injection molding, bonding or snap-fit. The conductive element 4 can be electrically connected to the first positive electrode tab 201 of the core 2 by means of wire, conductive sheet or direct connection. Similarly, the conductive element 4 can be electrically connected to the first negative electrode tab 202 of the core 2 in the same way. Thus, the conductive element 4 is used to lead the electrical energy of the core 2 to a specific position in the cavity 300. In order to facilitate the connection of the electrical device with the spherical battery, the electrical device can be equipped with a plug (not shown in the figure) that is adapted to the shape of the cavity 300. The plug has a plug terminal corresponding to the conductive element 4 so that the plug of the electrical device can be connected to the conductive element 4.

[0037] By adopting the above-described embodiments, the spherical battery provided in this application, through the provision of a column 3 with a cavity 300 within the receiving cavity 100 of the housing 1, and the provision of a winding core 2 within the receiving cavity 100, and the placement of a conductive element 4 electrically connected to the winding core 2 within the cavity 300 of the column 3, shifts the contact point for electrical connection between the spherical battery and external devices from the traditional outer surface or end to the cavity 300 inside the column 3. This effectively avoids the additional space occupied by exposed contact points of the spherical battery, improving the overall compactness of the spherical battery structure. Furthermore, the built-in conductive element 4 and its connection points are protected by the housing 1 and the column 3, effectively preventing short circuits caused by contact between the exposed conductive element 4 and other structures during transportation, installation, or use of the spherical battery. It also protects the exposed contact points and prevents physical collisions between the contact points and external structures, preventing damage to the contact points and effectively improving the reliability and durability of the spherical battery during use.

[0038] In addition, the cavity 300 of the column 3 can also be adapted to the plug of external electrical equipment. The cross-sectional shape of the cavity 300 can guide the insertion of the plug, so that the plug of the external electrical equipment can be inserted into the cavity 300 and assembled with the spherical battery. At the same time, after the connection is completed, the connection has good overall stability.

[0039] Alternatively, the column 3 can be made of insulating material, such as engineering plastics, ceramics, or metal coated with an insulating layer, whose main function is to provide structural support and form an isolated electrical channel.

[0040] Optionally, the cross-section of the column 3 can be annular, polygonal, or other regular or irregular cross-sectional shapes. Preferably, the cross-section of the column 3 is annular, so that the column 3 as a whole forms a columnar support structure, thereby facilitating the installation of the core 2.

[0041] In one embodiment, the core 2 is wound on the column 3, and the core 2 has a first positive tab 201 and a first negative tab 202, which are electrically connected to different positions of the conductive element 4.

[0042] In this embodiment, as Figure 4As shown, in addition to serving as a support for the spherical battery and separating the receiving cavity 100 and the cavity 300, the column 3 can also be used as a winding mandrel for the core 2. Specifically, during the preparation of the core 2, a stack composed of a positive electrode sheet, a negative electrode sheet, and a separator is wound around the column 3 as the axis to form a roughly annular or sleeve-shaped core 2. The core 2 is wrapped around the column 3, and after winding, the core 2 has a first positive electrode tab 201 and a first negative electrode tab 202 extending along the axial direction of the column 3. The first positive electrode tab 201 and the first negative electrode tab 202 are respectively connected to different positions of the conductive element 4 to facilitate the charging and discharging of the spherical battery.

[0043] With this configuration, the core 2 is wound around the column 3, eliminating the need for separate preparation and installation of the winding mandrel. Furthermore, the relative positional relationship between the core 2 and the column 3 is clear, simplifying the subsequent positioning process of the core 2 within the casing 1. Simultaneously, the column 3 stabilizes the structure of the core 2 within the spherical battery. By connecting the first positive electrode tab 201 and the first negative electrode tab 202 to the conductive element 4 located in the cavity 300, it is possible to avoid separately setting protrusions or end cap-type contact points on the surface of the casing 1 of the spherical battery. This allows the casing 1 of the spherical battery to remain intact and smooth, improving the overall compactness of the spherical battery structure and protecting the conductive element 4.

[0044] In one embodiment, such as Figure 2 , Figure 4 As shown, to improve the capacity and energy density of the spherical battery, multiple cores 2 are provided, which are spaced apart along the axial direction of the column 3. Specifically, multiple cores 2 are provided in the receiving cavity 100, coaxially surrounding the column 3, and adjacent cores 2 are axially spaced by an insulating structure to prevent short circuits. Simultaneously, by increasing the number of cores 2 in the receiving cavity 100 and utilizing the axial stacking of multiple cores 2 along the column 3, the axial space within the receiving cavity 100 is fully utilized, effectively avoiding the radial space waste caused by a single large-sized core 2. This improves the space utilization rate within the receiving cavity 100, thereby increasing the capacity and energy density of the spherical battery, enhancing its power output, and giving the spherical battery the advantage of high efficiency in special application scenarios.

[0045] Understandably, since the casing 1 of the spherical battery is roughly spherical, the receiving cavity 100 of the spherical battery is also roughly spherically arranged. The cross-sectional dimensions of the spherical battery along the axial direction of the column 3 are usually gradually varied. Therefore, the specific thickness of the multiple cores 2 stacked along the axial direction of the column 3 can be adaptively adjusted according to the position of the corresponding receiving cavity 100. For example, when there are three cores 2, the other core 2 located between the two cores 2 corresponds to the large receiving area in the middle of the receiving cavity 100. This core 2 can be adaptively thickened relative to the other two cores 2 to further improve the capacity and energy density of the spherical battery.

[0046] In one embodiment, a second positive electrode tab 5 is provided in the receiving cavity 100, and the first positive electrode tabs 201 of a plurality of winding cores 2 are all electrically connected to the second positive electrode tab 5, and the second positive electrode tab 5 is electrically connected to the conductive element 4; and / or, a second negative electrode tab 6 is provided in the receiving cavity 100, and the first negative electrode tabs 202 of a plurality of winding cores 2 are all electrically connected to the second negative electrode tab 6, and the second negative electrode tab 6 is electrically connected to the conductive element 4.

[0047] In this embodiment, as Figure 4 As shown, when multiple winding cores 2 are provided in the receiving cavity 100, in order to facilitate the connection between the tabs of the multiple winding cores 2 and the conductive element 4, a second positive tab 5 and / or a second negative tab 6 can be provided in the receiving cavity 100. Using the second positive tab 5 and the second negative tab 6 as intermediate current collectors, the tabs of the multiple winding cores 2 can be first gathered and then connected to the conductive element 4, thereby facilitating the connection between the multiple winding cores 2 and the conductive element 4 and reducing the manufacturing difficulty of the spherical battery. At the same time, by providing the second positive tab 5 and / or the second negative tab 6, the connection strength between the first positive tab 201 and the first negative tab 202 of the winding core 2 and the conductive element 4 can also be indirectly improved, thereby improving the electrical connection reliability of the spherical battery under vibration and shock environments.

[0048] Of course, in addition to the above-described embodiments, multiple first positive tabs 201 can also be directly connected to each other, and then connected to the conductive element 4 through one of the first positive tabs 201. Similarly, multiple first negative tabs 202 can also be directly connected to each other, and then connected to the conductive element 4 through one of the first negative tabs 202. The following description uses an example of three winding cores 2 with the first positive tabs 201 connected to the conductive element 4. When three winding cores 2 are provided, the first positive tabs 201 of the winding cores on both sides extend towards the winding core 2 in the middle, and the two first positive tabs 201 of the winding cores on both sides are welded to the first positive tab 201 of the winding core 2 in the middle, and then connected to the conductive element 4 through the first positive tab 201 of the winding core 2 in the middle. Similarly, the specific connection method of the first negative tabs 202 is basically the same as that of the first positive tabs 201, and will not be elaborated further here.

[0049] In one embodiment, an isolation ring 7 is provided inside the receiving cavity 100. The isolation ring 7 is sleeved and connected to the outside of the column 3 and located between two adjacent cores 2. The isolation ring 7 is used to separate the two adjacent cores 2.

[0050] In this embodiment, as Figure 2 , Figure 4 As shown, the isolation ring 7 is preferably an annular structure. The inner diameter of the isolation ring 7 is adapted to the outer diameter of the column 3 so that the isolation ring 7 can be fitted onto the outside of the column 3. The isolation ring 7 can be fixedly connected to the column 3 by interference fit, bonding, or welding. The isolation ring 7 is made of insulating material. The isolation ring 7 physically separates two adjacent cores 2, maintaining a preset safety gap between them. When the cores 2 expand during charging and discharging or are displaced by external impact, the safety gap can effectively prevent direct contact between adjacent cores 2, thereby reducing the risk of internal short circuits in the spherical battery.

[0051] Optionally, the receiving cavity 100 can be divided into multiple chambers along the axial direction of the column 3 by means of the isolation ring 7. These chambers can be interconnected or not interconnected according to actual needs.

[0052] In one specific embodiment, when assembling the spherical battery, the isolation ring 7 can be first assembled onto the column 3, and then the winding core 2 can be assembled onto the column 3. In this way, the isolation ring 7 can be used as a positioning structure when assembling multiple winding cores 2, ensuring that the multiple winding cores 2 are accurately positioned in the axial direction of the column 3, thereby improving the assembly efficiency and quality of the spherical battery.

[0053] In another specific embodiment, when assembling the spherical battery, the core 2 can be assembled onto the column 3 first, and then the insulating ring 7 can be assembled onto the column 3. In this embodiment, the insulating ring 7 can be set as two semi-rings, and the insulating ring 7 can be assembled onto the column 3 by splicing the two semi-rings. In this way, by assembling the core 2 first, the installation of the core 2 is facilitated.

[0054] In one embodiment, when multiple cores 2 are provided in the receiving cavity 100, in order to further facilitate the connection between the first positive tab 201 and the second negative tab 6 of the multiple cores 2 and the conductive element 4, the isolation ring 7 is provided with multiple openings 8, the first positive tab 201 of the core 2 passes through one of the openings 8, and the first negative tab 202 of the core 2 passes through another opening 8.

[0055] In this embodiment, as Figure 4 , Figure 5As shown, the through-hole 8 passes through the isolation ring 7. The shape of the through-hole 8 can be a round hole, a square hole, or a hole of other shapes. The through-hole 8 is used for the first positive electrode 201 and the first negative electrode 202 to pass through. The through-hole 8 not only facilitates the connection of multiple first positive electrodes 201 and conductive parts 4, as well as the connection of multiple first negative electrodes 202 and conductive parts 4, but also restricts the extension direction of the first positive electrodes 201 and the first negative electrodes 202. During the assembly of the core 2 and subsequent use, it effectively prevents the first positive electrodes 201 and the first negative electrodes 202 from shifting, bending, or rubbing against adjacent parts, which could lead to damage or short circuit risks.

[0056] Optionally, the size of the opening 8 is larger than the sizes of the first positive electrode tab 201 and the first negative electrode tab 202, so that adjacent chambers separated by the isolation ring 7 can be interconnected through the opening 8, thus meeting the wetting requirements of the electrolyte during the subsequent injection of electrolyte into the receiving cavity 100. Of course, in addition to the opening 8 for the first positive electrode tab 201 and the first negative electrode tab 202 to pass through, other openings 8 can also be provided on the isolation ring 7 solely for use as channels for electrolyte flow, further facilitating the flow of electrolyte within each chamber.

[0057] In one embodiment, the housing 1 includes an outer shell 101 and a cover 102. The outer shell 101 is sleeved on the outside of the core 2 and is connected to the isolation ring 7. A second opening 110 is provided between the end of the outer shell 101 and the end of the column 3. The cover 102 covers the second opening 110 and is sealed to the outer shell 101 and the column 3.

[0058] In this embodiment, as Figure 1 As shown, the outer casing 101 is a roughly spherical cylindrical structure. When the outer casing 101 is fitted onto the outside of the core 2, an annular or specifically shaped gap is formed between the outer casing 101 and the axially upward ends of the column 3. This gap is the second opening 110. By setting an annular or specifically shaped cap 102 inside the second opening 110, the column 3, the outer casing 101, and the caps 102 at both ends together form a receiving cavity 100. Furthermore, the caps 102 can be sealed to the outer casing 101 and the column 3 through laser welding or other methods, thereby forming a reliable sealing interface at the second opening 110, ensuring the sealing performance of the receiving cavity 100 of the spherical battery, and improving the service life of the spherical battery.

[0059] Optionally, when preparing a spherical battery, the core 2 can be installed on the column 3 first. After the core 2 is installed, the isolation ring 7, the cover 102 and the outer shell 101 are installed in sequence to facilitate the overall assembly of the spherical battery.

[0060] In one embodiment, the outer casing 101 includes a plurality of annular shells 1011, which are arranged along the axial direction of the outer casing 101, and an isolation ring 7 is provided between two adjacent annular shells 1011. A cover 102 is provided at the end of the outermost annular shell 1011. The annular shells 1011, the isolation ring 7 and the cover 102 are interconnected to form an outer casing 101 with a connecting arc-shaped outer surface.

[0061] In this embodiment, as Figure 1 , Figure 2 As shown, each annular shell 1011 is an independent annular or short cylindrical structure, and multiple annular shells 1011 and the isolation ring 7 are combined to form an outer surface with a generally arc shape. Furthermore, an isolation ring 7 is provided between adjacent annular shells 1011, and the annular shell 1011 and the column 3 are connected by the isolation ring 7 and the cover 102 to form an integral structure. Moreover, the annular shell 1011 is easier to process as an independent structure, and the combination of multiple annular shells 1011 facilitates the formation of the outer surface of a spherical battery.

[0062] Specifically, the isolation ring 7 has two opposing end faces along the axial direction of the column 3, and the isolation ring 7 also has an outer surface between the two end faces. The end of the annular shell 1011 facing the end face of the column 3 can be fixedly connected to the isolation ring 7 by welding or other means. Alternatively, the annular shell 1011 can also be sleeved on the outer surface of the isolation ring 7, and it can also be fixedly connected to the isolation ring 7 by welding or other means.

[0063] In one embodiment, such as Figure 1 , Figure 2 As shown, the annular shell 1011 is provided with an injection port 9, and a sealing element 10 is provided inside the injection port 9. Specifically, by providing the injection port 9 on the annular shell 1011, when there are multiple annular shells 1011, multiple injection ports 9 can be provided on the outer shell 101. Multiple injection ports 9 can realize the injection of electrolyte into different areas of the receiving cavity 100. When the through port 8 can connect two adjacent chambers, by injecting electrolyte at different positions on the shell 1, the electrolyte can fully wet each core 2, thereby ensuring that the electrolyte fills the receiving cavity 100 and meets the usage requirements. After the injection is completed, the injection port 9 is sealed by the sealing element 10 to ensure the sealing performance of the outer shell 101. The sealing element 10 can adopt an existing sealing structure as long as it can seal the injection port 9.

[0064] In one embodiment, the conductive element 4 includes a first connecting portion 401 and a second connecting portion 402, both of which are disposed on the inner sidewall of the column 3; the first connecting portion 401 is electrically connected to the first positive electrode tab 201, and the second connecting portion 402 is electrically connected to the first negative electrode tab 202.

[0065] In this embodiment, as Figure 3 , Figure 4 As shown, the first connecting part 401 and the second connecting part 402 can be two independent conductors. Both the first connecting part 401 and the second connecting part 402 are fixed to the inner wall of the column 3. The first positive electrode tab 201 of the winding core 2 can be electrically connected to the first connecting part 401 through a wire, a conductive sheet, or a direct extension. Similarly, the first negative electrode tab 202 of the winding core 2 can be electrically connected to the second connecting part 402 through a wire, a conductive sheet, or a direct extension. This arrangement eliminates the need for the first connecting part 401 and the second connecting part 402 to occupy additional space on the outer surface of the spherical battery, improving the overall compactness of the spherical battery structure. Furthermore, the built-in first connecting part 401 and the second connecting part 402 are protected by the shell 1 and the column 3, effectively preventing short circuits caused by contact between the exposed conductive parts 4 and other structures, and avoiding physical collisions between the first connecting part 401 and the second connecting part 402 and external structures, thus preventing damage to the first connecting part 401 and the second connecting part 402 and effectively improving the reliability and durability of the spherical battery during use.

[0066] Secondly, this application also provides an electrical device, including a plug and the aforementioned spherical battery, wherein the plug extends into the cavity 300 of the column 3 and is electrically connected to the conductive element 4.

[0067] In this embodiment, the connector of the electrical device can extend into the cavity 300 of the column 3 through the first opening 310, making the overall structure formed by the connector and the spherical battery compact and convenient for use. At the same time, the cavity 300 of the column 3 can also serve as a guide, facilitating the connector of the electrical device to extend into the cavity 300 and connect with the conductive component 4, thereby facilitating the connection between the connector and the spherical battery.

[0068] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A spherical battery, characterized in that, include: The housing (1) has an internal cavity (100) and a core (2) is provided inside the cavity (100). A column (3) is disposed in the receiving cavity (100). The column (3) has a cavity (300) that is separated from the receiving cavity (100). At least one end of the column (3) passes through the housing (1) and is provided with a first opening (310). The cavity (300) communicates with the first opening (310). A conductive element (4) is disposed in the cavity (300) and is electrically connected to the core (2).

2. The spherical battery according to claim 1, characterized in that, The core (2) is wound on the column (3). The core (2) has a first positive tab (201) and a first negative tab (202). The first positive tab (201) and the first negative tab (202) are electrically connected to different positions of the conductive element (4).

3. The spherical battery according to claim 2, characterized in that, Multiple cores (2) are provided, and the multiple cores (2) are arranged separately along the axial direction of the column (3).

4. The spherical battery according to claim 3, characterized in that, The cavity (100) is provided with a second positive electrode tab (5), and the first positive electrode tabs (201) of the plurality of cores (2) are all electrically connected to the second positive electrode tab (5), and the second positive electrode tab (5) is electrically connected to the conductive element (4); And / or, a second negative electrode tab (6) is provided in the receiving cavity (100), the first negative electrode tabs (202) of the plurality of winding cores (2) are electrically connected to the second negative electrode tab (6), and the second negative electrode tab (6) is electrically connected to the conductive element (4).

5. The spherical battery according to claim 3, characterized in that, An isolation ring (7) is provided inside the receiving cavity (100). The isolation ring (7) is sleeved and connected to the outside of the column (3) and located between two adjacent cores (2). The isolation ring (7) is used to separate two adjacent cores (2).

6. The spherical battery according to claim 5, characterized in that, The isolation ring (7) is provided with multiple openings (8), the first positive electrode tab (201) of the core (2) is inserted through one of the openings (8), and the first negative electrode tab (202) of the core (2) is inserted through another opening (8).

7. The spherical battery according to claim 5, characterized in that, The housing (1) includes: The outer shell (101) is fitted on the outside of the core (2). The outer shell (101) is connected to the isolation ring (7). A second opening (110) is provided between the end of the outer shell (101) and the end of the column (3). The cover (102) is sealed in the second opening (110) and is sealed to the outer shell (101) and the column (3).

8. The spherical battery according to claim 7, characterized in that, The outer shell (101) includes a plurality of annular shells (1011), which are arranged along the axial direction of the outer shell (101), and an isolation ring (7) is provided between two adjacent annular shells (1011). The cover (102) is provided at the end of the outermost annular shell (1011). The annular shell (1011), the isolation ring (7), and the cover (102) are interconnected to form the outer shell (101) with a connecting arc-shaped outer surface.

9. The spherical battery according to claim 8, characterized in that, The annular shell (1011) is provided with an injection port (9), and a sealing element (10) is provided inside the injection port (9).

10. The spherical battery according to any one of claims 2-9, characterized in that, The conductive component (4) includes a first connecting part (401) and a second connecting part (402), both of which are disposed on the inner sidewall of the column (3); The first connecting part (401) is electrically connected to the first positive electrode (201), and the second connecting part (402) is electrically connected to the first negative electrode (202).

11. An electrical appliance, characterized in that, include: Connector; The spherical battery according to any one of claims 1-10, wherein the connector extends into the cavity (300) of the column (3) and is electrically connected to the conductive element (4).

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