Battery cell, battery device, and electric device

Abstract

A battery cell, a battery device, and an electric device. The battery cell comprises: a housing component comprising a first housing wall, the first housing wall being provided with a first through hole; an electrode component, the electrode component being arranged in the housing component; and a pole component comprising an adapter, a pole body, and an insulating sealing structure, wherein the adapter is mounted in the first through hole and is provided with a second through hole, the second through hole comprises a first hole section, and in a direction from inside to outside of the second through hole, a hole opening size formed by the first hole section gradually decreases or increases, the pole body is arranged in the second through hole and is insulated from and in sealing fit with the first hole section via at least part of the insulating sealing structure, and the pole body is electrically connected to the electrode component.

Description

Battery cells, battery packs and electrical devices

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510080445.3, filed on January 17, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery cell, a battery device, and an electrical device. Background Technology

[0004] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Typically, a battery device consists of a casing and multiple battery cells housed within it. Currently, the reliability of individual battery cells needs further improvement. Summary of the Invention

[0005] This application provides a battery cell, a battery device, and an electrical device, which can effectively improve the reliability of the battery cell, thereby improving the reliability of the battery device and the electrical device.

[0006] In a first aspect, embodiments of this application provide a battery cell, comprising: a housing component including a first housing wall having a first through hole; an electrode component disposed within the housing component; and a terminal component including an adapter, a terminal body, and an insulating sealing structure. The adapter is mounted in the first through hole and has a second through hole, the second through hole including a first hole segment. In the direction from the inside to the outside of the second through hole, the orifice size formed by the first hole segment gradually decreases or increases. The terminal body is disposed in the second through hole and is insulated from and sealed to the first hole segment by at least a partial insulating sealing structure. The terminal body is electrically connected to the electrode component.

[0007] In this type of battery cell, for the terminal post component, the circumferential side of the terminal post body can be insulated and sealed within the second through hole through an insulating and sealing structure. This allows for an insulated and sealed connection between the terminal post body and the adapter. Using this method, the terminal post body and the second through hole are laterally insulated and sealed, resulting in a larger contact area and enhanced insulation and sealing performance. Furthermore, because the orifice size of the first section of the second through hole gradually decreases or increases from the inside out, and the first section has a reduction-size hole structure, the clamping force of the terminal post body on the insulating and sealing structure and the force exerted by the terminal post body perpendicular to the first shell wall are arranged at an angle. This results in a larger clamping force of the terminal post body on the insulating and sealing structure, allowing for greater compression of the insulating and sealing structure, further enhancing its insulation and sealing performance. This improves the reliability of the terminal post component and, consequently, the reliability of the battery cell.

[0008] In some embodiments of this application, the insulating sealing structure includes a seal and an insulating member. The seal is located closer to the inner side of the housing component than the insulating member and is sealed between the pole body and the first hole segment. The insulating member is insulatingly fitted between the pole body and the second through hole.

[0009] In the above technical solution, the insulating component has greater rigidity and strength than the sealing component. Therefore, the insulating component can play a supporting role between the electrode body and the second through hole. In other words, when the electrode body is pressed into the first hole section by riveting, the insulating component can play a supporting and limiting role, reducing the risk of excessive compression of the sealing component. This reduces the probability of damage caused by excessive compression of the sealing component, which affects the sealing performance. This is beneficial to improving the sealing performance between the electrode body and the adapter, thereby improving the reliability of the battery cell.

[0010] In some embodiments of this application, the sealing element abuts against the insulating element. In the above technical solution, the sealing element abuts against the insulating element, thereby enabling the sealing element and the insulating element to form a continuous insulating and sealing barrier, increasing the sealing and insulation boundary, and enhancing sealing and insulation performance. Furthermore, the mutual abutment of the sealing element and the insulating element also allows them to support each other, helping to improve the installation stability and reliability of the sealing element and the insulating element between the electrode body and the second through hole, thus enhancing the overall stability of the insulating and sealing structure and improving the reliability of the battery cell.

[0011] In some embodiments of this application, the orifice size formed by the first hole segment gradually decreases in the direction from the inside to the outside of the second through hole.

[0012] In the above technical solution, the first hole segment can be a shrinkage hole structure, thereby applying a reaction force towards the inside of the casing component to the electrode body. When the battery cell operates for a long time, causing an increase in internal gas pressure, resulting in a pull-out force towards the outside of the casing component on the electrode body, or when the electrode body is subjected to external forces due to connection to external contacts or other electrical components, forming an outward pull-out force, the first hole segment with the above structure can play a limiting and restraining role on the electrode body, reducing the probability of the electrode body detaching from the second through hole, and improving the overall reliability of the electrode component structure. Moreover, due to the restraining effect of the first hole segment on the electrode body, the electrode body can further act on the insulating sealing structure, thereby further compressing the insulating sealing structure, improving the sealing effect of the insulating sealing structure, and thus also improving the overall reliability of the electrode component.

[0013] In some embodiments of this application, the second through hole includes a second hole segment connected to the first hole segment and located closer to the outer side of the housing component than the first hole segment. In the direction from the inside to the outside of the second through hole, the orifice size formed by the second hole segment gradually increases.

[0014] In the above technical solution, the second hole section has a larger external dimension and a smaller internal dimension, which facilitates the installation of the pole body into the second through hole, reducing the installation difficulty of the pole body. Simultaneously, it also provides a limiting constraint on the pole body towards the outer side of the housing component, reducing the probability of displacement of the pole body towards the inner side of the housing component, thus improving the installation reliability of the pole body. Furthermore, the insulating component is installed within the second hole section, and the aforementioned structure of the second hole section facilitates the installation of the insulating component and provides relatively stable and reliable support for it, which is beneficial for the pre-assembly of the insulating component onto the adapter.

[0015] In some embodiments of this application, the insulating member includes a first insulating portion and a second insulating portion connected together. The first insulating portion is insulatingly fitted between the first hole segment and the pole body, and the second insulating portion is insulatingly fitted between the second hole segment and the pole body.

[0016] In the above technical solution, since the connection position between the first hole segment and the second hole segment is the position of maximum stress between the electrode body and the electrode body, by providing a first insulating part in the first hole segment and a second insulating part in the second hole segment, the insulating part can cover the connection position between the first hole segment and the second hole segment, which can better support the electrode body, thereby improving the installation stability and reliability of the electrode body in the second through hole, and thus improving the overall reliability of the battery cell.

[0017] In some embodiments of this application, the battery cell has a first direction parallel to the first shell wall, the electrode body has an inner end close to the electrode component, the maximum dimension of the portion of the inner end that contacts the seal in the first direction is W1, and the minimum dimension of the first hole segment in the first direction is W2, wherein W1≥W2+2*t1, 0.5mm≤t1≤1mm.

[0018] In the above technical solution, by setting the dimensions W1 and W2 within the above range, the maximum dimension of the part in contact with the seal on the inner end in the first direction is greater than the minimum dimension of the first hole segment in the first direction. This reduces the risk of the electrode body coming out of the second through hole. At the same time, it also helps to make the inner end of the electrode body close to the surface of the adapter, reducing the space occupied inside the housing component and improving the energy density of the battery cell.

[0019] In some embodiments of this application, the maximum dimension of the first hole segment in the first direction is W3, where W3 ≥ W1 + 2*t2, and t2 is the thickness of the seal after compression. In the above technical solution, by setting W3 and W1 within the above range, the compression amount of the seal can be guaranteed while ensuring that the pole body and the seal can be installed into the first hole segment.

[0020] In some embodiments of this application, the wall of the first hole segment is an inclined wall that is inclined relative to the first shell wall, and the included angle between the first hole segment and the first shell wall is θ1; the adapter includes a main body and a protrusion. On the outside of the second through hole, the protrusion protrudes relative to the main body and is provided with a second through hole. In the direction from the inside to the outside of the second through hole, the size of the part of the seal located in the second through hole is H1, the size of the main body is H2, and the size of the first hole segment is H3, wherein H3≥H2≥H1, and H3 / tan(π-θ1)=1 / 2(W3-W2).

[0021] In the above technical solution, by setting H3, H2, and H1 within the aforementioned range, the electrode body and the sealing element can have a longer sealing boundary in the direction from the inside to the outside of the second through hole. This improves sealing reliability and ensures that the sealing element does not exceed the junction of the first and second hole segments, reducing the risk of the electrode body detaching from the second through hole and improving the installation reliability of the electrode body. θ1 can be calculated using the formula H3 / tan(π-θ1)=1 / 2(W3-W2), thus ensuring that the design of the inclined plane meets the requirements, allowing the electrode body to exert a large compression on the sealing element and providing a good constraint and limiting effect on the electrode body.

[0022] In some embodiments of this application, the insulating member includes a third insulating portion, which is connected to the second insulating portion and is insulatingly fitted between the outer surface of the adapter away from the first housing wall and the pole body.

[0023] In the above technical solution, the insulating component is composed of three parts: a first insulating part, a second insulating part, and a third insulating part. As a result, the insulating component has a longer dimension on the inner contour line of the adapter located inside the second through hole, which can increase the insulation boundary between the insulating component and the adapter and the terminal body, enhance the insulation protection performance of the insulating component between the terminal body and the adapter, and thus improve the reliability of the terminal component and the overall reliability of the battery cell.

[0024] In some embodiments of this application, the wall of the first hole segment is an inclined wall that is inclined relative to the first shell wall; and / or, the wall of the second hole segment is an inclined wall that is inclined relative to the first shell wall. This technical solution provides more design options for the first and second hole segments, enhancing their design flexibility and facilitating the fulfillment of different usage requirements.

[0025] In some embodiments of this application, the seal includes a first sealing portion and a second sealing portion connected together. The first sealing portion is sealed between the first hole segment and the electrode body, and the second sealing portion is sealed on the inner side of the adapter near the electrode component. In this technical solution, using a seal with the above-described structure increases the sealing boundary of the seal, which is beneficial for increasing the sealing surface. The seal provides more comprehensive coverage of the first hole segment, thereby reducing the risk of seal failure and enhancing the sealing effect, improving the reliability of the electrode component, and ultimately improving the reliability of the battery cell.

[0026] In some embodiments of this application, the battery cell includes a first insulating structure, which includes a connected body portion and an extension portion. The body portion is disposed on the inner side of the adapter near the electrode component, and the extension portion is insulatedly fitted between the first hole segment and the electrode body.

[0027] In the above technical solution, during the riveting and pressing of the sealing element onto the electrode post body, the insulating element provides support and restraint on the side of the sealing element facing outwards from the housing component, while the extension of the first insulating structure also provides support and restraint on the other side of the sealing element facing inwards from the housing component. This reduces the likelihood of excessive compression of the sealing element and further improves the reliability of the electrode post component. Furthermore, the extension of the first insulating structure helps reduce plastic deformation during the riveting of the electrode post body, reducing the difficulty of the riveting process and consequently the manufacturing difficulty of the electrode post component. The first insulating structure also provides insulation on the side of the adapter facing inwards from the housing component, reducing the risk of short circuits between the adapter and the first housing wall and electrode components, further improving the reliability of the battery cell.

[0028] In some embodiments of this application, the sealing element includes a first sealing portion and a second sealing portion connected together. The first sealing portion is sealed between the first hole segment and the pole body, and the second sealing portion is sealed between the second hole segment and the pole body; the insulating element is insulatingly fitted between the second hole segment and the pole body.

[0029] In the above technical solution, the sealing element formed by the first and second sealing parts is V-shaped and fits into the waist position of the second through hole. This creates a V-shaped sealing interface between the sealing element and the second through hole. This sealing result is more complex than a straight interface, increasing the difficulty for moisture, dust, and other particulate matter to pass through, thereby enhancing the sealing effect and further improving the overall sealing reliability of the terminal post component, and consequently improving the reliability of the battery cell. Furthermore, the waist position of the terminal post body and the second through hole has greater stress, allowing the sealing element to have a greater compression, which further enhances the sealing performance between the terminal post body and the second through hole, improving the reliability of the battery cell.

[0030] In some embodiments of this application, the insulating member includes a first insulating portion and a second insulating portion connected together. The first insulating portion is insulatingly fitted between the second hole segment and the pole body, and the second insulating portion is insulatingly fitted between the outer side of the adapter away from the first shell wall and the pole body.

[0031] In the above technical solution, the insulating component not only provides insulation between the second hole section and the electrode body, but also provides insulation between the electrode body and the outer surface of the adapter. This increases the insulation interface of the insulating component, i.e., increases the insulation range, thereby improving the insulation reliability of the electrode component and thus improving the reliability of the battery cell.

[0032] In some embodiments of this application, the electrode body includes a first electrode portion and a second electrode portion connected together. The first electrode portion is disposed within a first hole segment and is sealed to a sealing element, while the second electrode portion is disposed within a second hole segment and is insulated to an insulating element. In the direction from the inside to the outside of the second through hole, the size of the first electrode portion gradually decreases, and the size of the second electrode portion gradually increases. In this technical solution, the shape of the electrode body is matched to the shapes of the first and second hole segments, thereby improving the fit of the electrode body to the sealing and insulating elements, enhancing the riveting and clamping effect, and thus improving the reliability of sealing and insulation.

[0033] In some embodiments of this application, the pole body includes a third pole portion disposed on the outside of the housing component. The third pole portion is connected to the second pole portion and is circumferentially arranged around the second pole portion. The third pole portion and the outer side of the adapter away from the first housing wall are insulated from each other by an insulating member.

[0034] In the above technical solution, the third electrode post can be pressed against the outside of the adapter and cooperate with the first electrode post to clamp the adapter, while simultaneously pressing the sealing and insulating components. The insulating component can provide insulation between the third electrode post and the adapter, reducing the risk of short circuits between them, which helps improve the insulation reliability of the electrode post components, and thus improves the reliability of the battery cell.

[0035] In some embodiments of this application, in the direction from the inside to the outside of the second through hole, the adapter has an outer side and an inner side, one end of the first hole segment is connected to the inner side and the other end is connected to the outer side.

[0036] In the above technical solution, the overall structure of the second through hole is relatively simple, which simplifies the manufacturing process, improves manufacturability, and reduces manufacturing difficulty and cost. Since the second through hole is a compression hole structure, all positions on its inner circumferential wall exert a compressive effect on the insulating and sealing structure. This allows the insulating and sealing structure to have a larger compressed area, resulting in a greater range of compression. This, in turn, enhances insulation and sealing performance, improves the reliability of the terminal components, and consequently, improves the reliability of the battery cell.

[0037] In some embodiments of this application, the other end of the first hole segment is connected to the outer surface via a rounded arc transition or a right-angle transition. In this technical solution, connecting the first hole segment to the outer surface via a rounded arc transition or a right-angle transition can alleviate stress concentration, improve the reliability of the adapter, and reduce the risk of stress concentration and damage to the insulation and sealing structure during the riveting process of the pole body, thereby improving the reliability of the insulation and sealing structure.

[0038] In some embodiments of this application, the insulating sealing structure includes a seal and an insulating member. The insulating member is disposed on the side of the seal away from the electrode component. The insulating member is insulatingly fitted between the first hole segment and the electrode body, and the seal is sealingly fitted between the first hole segment and the electrode body.

[0039] In the above technical solution, the insulating component has greater rigidity and strength than the sealing component. Therefore, the insulating component can play a supporting role between the electrode body and the second through hole. In other words, when the electrode body is pressed into the first hole section by riveting, the insulating component can play a supporting and limiting role, reducing the risk of excessive compression of the sealing component. This reduces the probability of damage caused by excessive compression of the sealing component, which affects the sealing performance. This is beneficial to improving the sealing performance between the electrode body and the adapter, thereby improving the reliability of the battery cell.

[0040] In some embodiments of this application, in the direction from the inside to the outside of the second through hole, the size of the sealing element within the first hole segment is larger than the size of the insulating element within the first hole segment. In the above technical solution, by making the size of the sealing element larger than the size of the insulating element, the sealing performance between the electrode post body and the second through hole can be enhanced, which is beneficial to meeting the requirement of higher sealing performance for the electrode post component.

[0041] In some embodiments of this application, the seal includes a first sealing portion and a second sealing portion connected together. The first sealing portion is sealed between the first hole segment and the electrode body, and the second sealing portion is located on the side of the adapter near the electrode component.

[0042] In the above technical solution, the sealing element with the above structure can increase the sealing boundary of the sealing element, which is beneficial to increase the sealing surface. The sealing element has a more comprehensive covering effect on the first hole section, thereby reducing the risk of sealing failure and thus enhancing the sealing effect, improving the reliability of the terminal component, and thus improving the reliability of the battery cell.

[0043] In some embodiments of this application, the insulating member includes a first insulating portion and a second insulating portion connected together. The first insulating portion is insulatingly fitted between the first hole segment and the pole body, and the second insulating portion is insulatingly fitted between the outer side of the adapter away from the first shell wall and the pole body.

[0044] In the above technical solution, the insulating component is composed of two parts: a first insulating part and a second insulating part. As a result, the insulating component has a longer dimension on the inner contour line of the adapter located inside the second through hole, which can increase the insulation boundary between the insulating component and the adapter and the terminal body, enhance the insulation protection performance of the insulating component between the terminal body and the adapter, and thus improve the reliability of the terminal component and the overall reliability of the battery cell.

[0045] In some embodiments of this application, the orifice size formed by the first hole segment gradually decreases in the direction from the inside to the outside of the second through hole.

[0046] In the above technical solution, the first hole segment can be a shrinkage hole structure, thereby applying a reaction force towards the inside of the casing component to the electrode body. When the battery cell operates for a long time, causing an increase in internal gas pressure, resulting in a pull-out force towards the outside of the casing component on the electrode body, or when the electrode body is subjected to external forces due to connection to external contacts or other electrical components, forming an outward pull-out force, the first hole segment with the above structure can play a limiting and restraining role on the electrode body, reducing the probability of the electrode body detaching from the second through hole, and improving the overall reliability of the electrode component structure. Moreover, due to the restraining effect of the first hole segment on the electrode body, the electrode body can further act on the insulating sealing structure, thereby further compressing the insulating sealing structure, improving the sealing effect of the insulating sealing structure, and thus also improving the overall reliability of the electrode component.

[0047] In some embodiments of this application, the electrode body includes a first electrode portion disposed within a first hole segment and insulated from and sealed to the first hole segment by an insulating sealing structure. The size of the first electrode portion gradually decreases from the inside to the outside of the second through hole. In this technical solution, the shape of the electrode body is designed to match the shape of the first hole segment, thereby improving the fit of the electrode body to the insulating sealing structure, enhancing the riveting and tightening effect, and thus improving the reliability of sealing and insulation.

[0048] In some embodiments of this application, the pole body includes a second pole portion disposed on the outside of the housing component. The second pole portion is connected to the first pole portion and is circumferentially arranged around the second pole portion. The second pole portion is insulatedly connected to the adapter through an insulating sealing structure.

[0049] In the above technical solution, the second electrode post can be pressed against the outside of the adapter and cooperates with the first electrode post to clamp the adapter, while simultaneously pressing the insulating sealing structure. The insulating sealing structure can provide insulation between the second electrode post and the adapter, reducing the risk of short circuits between the second electrode post and the adapter, which helps to improve the insulation reliability of the electrode post components, and thus improves the reliability of the battery cell.

[0050] In some embodiments of this application, the wall of the first hole segment is an inclined wall that is inclined relative to the first shell wall, and the included angle between the first hole segment and the first shell wall is θ1, wherein 120 degrees ≤ θ1 ≤ 130 degrees.

[0051] In the above technical solution, by setting the first hole segment as an inclined wall, good manufacturability is achieved. By setting the included angle between the first hole segment and the first shell wall within the aforementioned range, the periphery of the electrode body can have a large amount of compression on the insulating and sealing structure, thereby achieving high insulation and sealing effects. Furthermore, it effectively reduces the probability of the electrode body being pulled out of the second through hole by pull-out force, while also allowing for a suitable size for the second through hole. This facilitates the design of the electrode body to meet high strength and rigidity requirements, thereby improving the reliability of the electrode component and the battery cell.

[0052] In some embodiments of this application, the battery cell includes a first insulating structure disposed on the inner side of the adapter near the electrode component. In this technical solution, the first insulating structure provides insulation to the inner side of the adapter facing the housing component, reducing the risk of short circuits between the adapter and the first housing wall and the electrode component, thereby improving the reliability of the battery cell.

[0053] In some embodiments of this application, the battery cell includes a first insulating structure, which includes a connected body portion and an extension portion. The body portion is disposed on the inner side of the adapter near the electrode component, and the extension portion is insulatedly fitted between the first hole segment and the electrode body.

[0054] In the above technical solution, on the one hand, the extension of the first insulating structure can support the pole body, providing a limiting effect for the pole body to compress the insulating sealing structure, reducing the risk of excessive compression of the insulating sealing structure by the pole body, thereby reducing the probability of the insulating sealing structure being damaged and improving the reliability of the insulating sealing structure. On the other hand, the first insulating structure can cooperate with the pole body to be installed at one end of the first hole section near the housing component, thereby reducing the amount of plastic deformation at the inner end of the pole body, which helps to reduce the processing difficulty of the pole body and thus enhances the manufacturability of the pole component.

[0055] In some embodiments of this application, the battery cell includes a second insulating structure that is insulatingly fitted between the outer side of the adapter away from the first housing wall and the peripheral side of the electrode body.

[0056] In the above technical solution, the second insulating structure provides insulation on the outside of the adapter, reducing the probability of a short circuit between the adapter and the terminal body. Furthermore, the second insulating structure also provides protection by sealing the gap between the adapter and the terminal body, reducing the risk of external moisture, dust, and other particles entering the terminal and housing components through the gap. It also reduces damage to the adapter from mechanical impacts, thereby improving the reliability of the terminal components and, consequently, the reliability of the individual battery cells.

[0057] In some embodiments of this application, the second insulating structure and the insulating sealing structure are integrally molded parts. In this technical solution, this construction forms a continuous and closed insulating boundary on the pole body, which enhances insulation and sealing performance and helps to firmly fix the pole body, improving the installation reliability of the pole body. Furthermore, the above structure reduces the number of parts and assembly steps, simplifying the production process and thus reducing manufacturing costs.

[0058] In some embodiments of this application, the electrode body includes a first material component and a second material component. The second material component wraps around the periphery of the first material component and the bottom side near the electrode component, and the second material component is electrically connected to the electrode component. In this technical solution, by configuring the electrode body to include a first material component and a second material component, the electrode body can be a composite material electrode, which can reduce costs while meeting the requirements of efficient current conduction. Furthermore, it facilitates the welding of the electrode body to external conductive components, thereby improving the manufacturability of the electrode component and increasing the product yield.

[0059] In some embodiments of this application, the pole body includes a first material component and a second material component. The second material component is disposed in a second through hole. The first material component is circumferentially arranged around the first material component and is provided with an insert of the same material as the second material component. The insert is welded to the second material component.

[0060] In the above technical solution, the second material component can be prefabricated directly in one step and installed in the second through hole. The first material component is on the outside of the adapter and is welded to the second material component through an insert. Thus, the first material component and the second material component can form the pole body by butt welding. The pole body of the composite material formed by this splicing method has good manufacturability and helps to reduce costs.

[0061] In some embodiments of this application, the first material is aluminum and the second material is copper. In this technical solution, the electrode body is a copper-aluminum composite electrode. Using this composite electrode material not only provides good conductivity but also helps to reduce material costs.

[0062] Secondly, embodiments of this application also provide a battery cell, comprising: a housing component including a first housing wall, the first housing wall having a first through hole, the first through hole including a first hole segment, wherein the orifice size formed by the first hole segment gradually decreases or increases in the direction from the inside to the outside of the first through hole; an electrode component disposed within the housing component; and a terminal component including a terminal body and an insulating sealing structure, the terminal body being disposed in the first through hole and insulated and sealed with the first hole segment by at least a partial insulating sealing structure, the terminal body being electrically connected to the electrode component.

[0063] In the above technical solutions, under the premise that the electrode body can enable the insulation and sealing structure to have a large amount of compression, more options can be provided for the design of battery cells to meet different requirements.

[0064] Thirdly, embodiments of this application also provide a battery device, including a single battery cell as described above.

[0065] In the above technical solution, since the battery cell has high reliability, the battery device using the battery cell can have good reliability.

[0066] Fourthly, embodiments of this application also provide an electrical device, including a single battery cell as described above, or a battery device as described above.

[0067] In the above technical solution, since the battery cell or battery device has high reliability, it is beneficial to improve the reliability of the electrical device that uses the battery cell or battery device. Attached Figure Description

[0068] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0069] Figure 1 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application as a vehicle;

[0070] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0071] Figure 3 is a schematic diagram of the internal structure of a battery cell provided in some embodiments of this application;

[0072] Figure 4 is a schematic diagram of the structure of the pole post component provided in some embodiments of this application;

[0073] Figure 5 is a schematic diagram of the assembly and molding of the pole post component provided in some embodiments of this application;

[0074] Figure 6 is a schematic diagram of the pole post component provided in another embodiment of this application;

[0075] Figure 7 is a schematic diagram of the pole post component provided in another embodiment of this application;

[0076] Figure 8 is a structural schematic diagram of the pole post component provided in another embodiment of this application;

[0077] Figure 9 is a schematic diagram of the assembly and molding of the pole post component provided in another embodiment of this application;

[0078] Figure 10 is a structural schematic diagram of the pole post component provided in another embodiment of this application;

[0079] Figure 11 is a schematic diagram of the assembly process of the pole piece, electrode piece and housing piece provided in some embodiments of this application.

[0080] icon:

[0081] 1000. Electrical appliances;

[0082] 100. Battery device;

[0083] 10. Box body; 11. First box body; 12. Second box body;

[0084] 20. Battery cell;

[0085] 21. Housing components;

[0086] 2101, First shell wall; 2102, First through hole; 211, Shell body; 212, Cover plate;

[0087] 22. Electrode components; 221. Electrode tabs;

[0088] 23. Pole post components;

[0089] 231. Adapter; 201. Second through hole; 2011. First hole section; 2012. Second hole section; 2311. Main body; 2312. Protrusion; 231a. Outer surface; 231b. Inner surface;

[0090] 232. Pole body;

[0091] 2321, First pole post; 2322, Second pole post; 2323, Third pole post; 2041, First material component; 2042, Second material component; 2043, Insert; 232a, Inner end;

[0092] 233. Insulating and sealing structure;

[0093] 2331, Seal; 2031, First sealing part; 2032, Second sealing part;

[0094] 2332, Insulating component; 2021, First insulating part; 2022, Second insulating part; 2023, Third insulating part;

[0095] 24. First insulation structure;

[0096] 241. Main body; 2411. Bending part; 242. Extension part;

[0097] 25. Second insulation structure;

[0098] 200, controller; 300, motor; X, first direction; Z, third direction. Detailed Implementation

[0099] 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 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.

[0100] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0101] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0102] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0103] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0104] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0105] In this application, "multiple" means two or more (including two).

[0106] In this application, the battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, and the embodiments of this application are not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0107] The battery apparatus mentioned in the embodiments of this application can refer to an assembly of one or more battery cells for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0108] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0109] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing. As an example, the individual battery cell assembly may be a battery module, which can be housed within the housing by securing the battery module to the housing. Alternatively, the individual battery cell assembly may be housed within the housing by directly securing multiple individual battery cells to the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the individual battery cells.

[0110] A single battery cell includes a casing, electrode components, and electrolyte. The casing houses the electrode components and electrolyte. The electrode components consist of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0111] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode components can be of a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0112] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the power battery, as the power source, plays an irreplaceable and crucial role. A battery pack consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, the battery pack has high reliability requirements; currently, the reliability of individual battery cells needs further improvement.

[0113] In a typical battery cell, besides the casing, electrode components, and electrolyte, there is also a terminal post component. The terminal post component is mounted on the casing and electrically connected to the electrode components. This terminal post component typically includes a terminal post body, the periphery of which is usually sealed by a sealing structure. This sealing structure is generally located between the terminal post body and the upper or lower surface of the casing wall, and is pressed tightly between the terminal post body and the casing wall by pre-applied pressure to ensure the compression of the sealing structure. However, when the applied pre-force is removed, or during subsequent use, the terminal post body loosens relative to the casing wall, causing the compression of the sealing structure to gradually decrease. This affects the sealing performance of the terminal post body, thereby impacting the reliability of the battery cell.

[0114] Based on the above considerations, in order to address the issue that the reliability of the battery cell is affected by the reliability risk of the terminal post component, the applicant has designed a battery cell comprising: a housing component, an electrode component, and a terminal post component. The housing component includes a first housing wall with a first through hole. The electrode component is disposed within the housing component. The terminal post component includes an adapter, a terminal post body, and an insulating and sealing structure. The adapter is installed in the first through hole and has a second through hole. The second through hole includes a first hole segment. In the direction from the inside to the outside of the second through hole, the orifice size formed by the first hole segment gradually decreases or increases. The terminal post body is disposed in the second through hole and is insulated and sealed with the first hole segment through at least a partial insulating and sealing structure. The terminal post body is electrically connected to the electrode component.

[0115] In this type of battery cell structure, for the terminal post component, the circumferential side of the terminal post body can be insulated and sealed within the second through hole through an insulating and sealing structure. This allows for an insulated and sealed connection between the terminal post body and the adapter. Using this method, the terminal post body and the second through hole are laterally insulated and sealed, resulting in a larger contact area and enhanced insulation and sealing performance. Furthermore, because the orifice size formed by the first hole segment gradually decreases or increases from the inside out in the second through hole, the terminal post body can compress the insulating and sealing structure through localized deformation and expansion to adapt to the structure of the first hole segment. This allows the insulating and sealing structure to have a large compression amount, further enhancing the insulation and sealing effect. Moreover, the terminal post body maintains a relatively reliable and stable state after expansion and deformation, improving the stability of the compression amount of the insulating and sealing structure, further enhancing its insulation and sealing effect. This improves the reliability of the terminal post component and, consequently, the reliability of the battery cell.

[0116] The battery cells or battery devices composed of battery cells disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and battery devices disclosed in this application can also be used, which helps to broaden the applicability of the battery cells or battery devices.

[0117] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0118] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device 1000 according to one embodiment of this application. Please refer to Figure 1, which is a structural schematic diagram of a vehicle provided in some embodiments of this application for the electrical device 1000. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0119] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0120] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which cover each other, and the first housing body 11 and the second housing body 12 together define an assembly space for accommodating the battery cells 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 together define the assembly space; the first housing body 11 and the second housing body 12 may also be hollow structures both open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0121] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0122] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes multiple rows of battery cells 20, which are arranged along the length of the housing 10. Each row of battery cells 20 includes multiple battery cells 20 arranged along the width of the housing 10; or, the multiple rows of battery cells 20 are arranged along the width of the housing 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the length of the housing 10.

[0123] Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 20 that can be recharged after discharge to activate the active materials and continue to be used. It can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this embodiment is not limited in this respect. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes. For example, referring to FIG2, the battery cell 20 is cuboid in shape.

[0124] Referring to Figure 3, some embodiments of this application provide a battery cell 20, including: a housing component 21, an electrode component 22, and a terminal component 23. The housing component 21 includes a first housing wall 2101, and the first housing wall 2101 has a first through hole 2102. The electrode component 22 is disposed inside the housing component 21. The terminal component 23 includes an adapter 231, a terminal body 232, and an insulating sealing structure 233. The adapter 231 is installed in the first through hole 2102 and has a second through hole 201. The second through hole 201 includes a first hole segment 2011. In the direction from the inside to the outside of the second through hole 201, the orifice size formed by the first hole segment 2011 gradually decreases or increases. The terminal body 232 is disposed in the second through hole 201 and is insulated and sealed with the first hole segment 2011 by at least partially insulating and sealing structure 233. The terminal body 232 is electrically connected to the electrode component 22.

[0125] The housing component 21 can refer to a structure used to house and protect the internal components of the battery cell 20. The shape of the housing component 21 can be, but is not limited to, a cuboid, a cube, a cylinder, etc., and the material can be, but is not limited to, metal materials (such as aluminum, stainless steel, etc.), plastic materials (such as polypropylene, polyamide, polyphenylene sulfide, etc.), composite materials (such as carbon fiber reinforced composite materials, aluminum-plastic film, etc.), or other materials resistant to electrolyte corrosion, etc.

[0126] The first shell wall 2101 can refer to one of a plurality of shell walls that enclose the shell component 21. For example, the shell component 21 can have a first direction X, a second direction, and a third direction Z, wherein the second direction can refer to a direction perpendicular to the first direction X and the third direction Z. For example, the first direction X is the length direction of the battery cell 20, the second direction is the width direction of the battery cell 20, and the third direction Z is the height direction of the battery cell 20. The first shell wall 2101 can refer to the shell wall at one or both ends of at least one of the first direction X, the second direction, and the third direction Z of the shell component 21. For example, referring to FIG3, the first shell wall 2101 can be the shell wall at one end of the shell component 21 in the third direction Z.

[0127] The explanation of electrode component 22 can be found above, and will not be repeated here.

[0128] The terminal component 23 can refer to the component in the battery cell 20 that connects the internal electrode component 22 to the external circuit. The terminal body 232 can be a conductor, and its material can be, but is not limited to, metallic materials, such as copper or aluminum. The adapter 231 can refer to a connecting structure or component that fixes the terminal body 232 to the first housing wall 2101; for example, the adapter 231 can be an adapter plate. The insulating and sealing structure 233 can refer to a structure that provides sealing and insulation between the adapter 231 and the terminal body 232, preventing electrolyte leakage from inside the battery cell 20, and preventing external air and moisture from entering the battery cell 20. The connection method between the terminal body 232 and the electrode component 22 can include, but is not limited to, ultrasonic welding, ultrasonic pre-welding + laser welding, resistance welding, pressure welding, brazing, or adhesive bonding. The terminal component 23 of the above structure can be either the positive or negative electrode of the battery cell 20.

[0129] The second through hole 201 can refer to the hole structure opened on the adapter 231 for installing the pole body 232. The second through hole 201 may only include the first hole segment 2011; or it may include not only the first hole segment 2011 but also other hole segments, that is, a part of the second through hole 201 is constructed as the first hole segment 2011.

[0130] Referring to Figures 3 and 4, as an example, the direction from the inside to the outside of the second through hole 201 can refer to the direction along the third direction Z in Figure 3, pointing from the electrode component 22 to the pole component 23. The orifice size formed by the first hole segment 2011 can refer to the size in the first direction X in Figures 3 and 4. In other examples, the orifice size formed by the first hole segment 2011 can also refer to the size in the second direction, or it can refer to the size in both the first direction X and the second direction. The phrase "the orifice size formed by the first hole segment 2011 gradually decreases or increases" means that the hole wall surface of the first hole segment 2011 located on the third direction Z periphery can be, but is not limited to, an arc-shaped surface, a sloped surface, a wavy surface with an overall arc trajectory, or other irregularly shaped surfaces that meet the requirements.

[0131] In the above technical solution, the pole body 232 needs to cooperate with the second through hole 201 and the insulating sealing structure 233. Therefore, it can be fixed in the second through hole 201 by means including but not limited to riveting, welding and other methods.

[0132] As an example, referring to Figure 5, the pole body 232 can be riveted and installed on the adapter 231. First, the pole body 232 is pre-pressed into a semi-finished product, and the insulating sealing structure 233 is installed in the second through hole 201. Then, the pole body 232 is installed in the second through hole 201. By applying force to the two ends of the pole body 232 located in the third direction Z, the pole body 232 is riveted and fixed on the adapter 231. This makes the shape of the pole body 232 and the first hole segment 2011 match. Therefore, the circumferential side of the pole body 232 corresponding to the first hole segment 2011 can also be, but is not limited to, an arc surface or a slope. This allows the insulating sealing structure 233 to be insulating and sealingly fitted between the circumferential side of the pole body 232 and the second through hole 201, which can increase the contact area and thus enhance the insulation and sealing effect.

[0133] During the process of forming an arc-shaped or inclined surface on the circumferential side of the pole body 232 to adapt to the shape of the first hole segment 2011, when the pole body 232 is fixed on the first hole segment 2011, the pole body 232 is subjected to a force along the third direction Z. The clamping force of the part of the pole body 232 corresponding to the first hole segment 2011 on the insulating sealing structure 233 and the force along the third direction Z form a certain angle. As a result, the pole body 232 can form a greater clamping force on the insulating sealing structure 233, that is, it has a greater squeezing effect on the insulating sealing structure 233. This can also make the insulating sealing structure 233 and the pole body 232 have a greater amount of compression, which can improve the stability of the compression of the insulating sealing structure 233, and further enhance the insulation and sealing effect of the insulating sealing structure 233.

[0134] In the above technical solution, for the terminal component 23 of the battery cell 20, the circumferential side of the terminal body 232 can be insulated and sealed in the second through hole 201 through the insulating sealing structure 233, thereby enabling the terminal body 232 and the adapter 231 to be insulated and sealed together. In this way, the terminal body 232 and the second through hole 201 are insulated and sealed together on the side, which can have a larger contact area, thereby enhancing the insulation and sealing effect. Furthermore, since the orifice size formed by the first hole segment 2011 gradually decreases or increases in the direction from the inside to the outside of the second through hole 201, and the first hole segment 2011 is a shrinkage hole structure, the clamping force of the electrode body 232 on the insulating sealing structure 233 and the force of the electrode body 232 perpendicular to the first shell wall 2101 are arranged at an angle. As a result, the clamping force of the electrode body 232 on the insulating sealing structure 233 is relatively large, which enables the insulating sealing structure 233 to have a large amount of compression, further enhancing the insulation and sealing effect. Moreover, the electrode body 232 has a relatively reliable and stable state after expansion and deformation, which can improve the stability of the compression amount of the insulating sealing structure 233, further enhancing the insulation and sealing effect of the insulating sealing structure 233, thereby improving the reliability of the electrode component 23, and thus improving the reliability of the battery cell 20.

[0135] In some embodiments of this application, referring to FIG4, the insulating sealing structure 233 includes a sealing member 2331 and an insulating member 2332. The sealing member 2331 is closer to the inner side of the housing component 21 than the insulating member 2332 and is sealed between the pole body 232 and the first hole segment 2011. The insulating member 2332 is insulatingly fitted between the pole body 232 and the second through hole 201.

[0136] The seal 2331 can refer to a structure or component used to isolate the interior of the battery cell 20 from the external environment, and the material can include, but is not limited to, rubber (e.g., nitrile rubber), plastic (e.g., polyolefins), etc. The seal 2331 can be understood as a ring-shaped structure arranged in a third direction Z around the electrode post body 232.

[0137] The insulating component 2332 can refer to a component used to prevent short circuits between the pole body 232 and the housing component 21, and the material can include, but is not limited to, plastics (such as polyethylene, polypropylene, polycarbonate, polyamide), ceramics, etc.

[0138] In the above technical solution, the insulating component 2332 has greater rigidity and strength than the sealing component 2331. Therefore, the insulating component 2332 can play a supporting role between the electrode body 232 and the second through hole 201. That is to say, when the electrode body 232 presses the sealing component 2331 into the first hole section 2011 by riveting, the insulating component 2332 can play a supporting and limiting role, reducing the risk of excessive compression of the sealing component 2331, thereby reducing the probability of damage caused by excessive compression of the sealing component 2331 and affecting the sealing performance. This is beneficial to improving the sealing performance between the electrode body 232 and the adapter 231, thereby improving the reliability of the battery cell 20.

[0139] In some embodiments of this application, referring to FIG4, the seal 2331 abuts against the insulator 2332.

[0140] In the above technical solution, the sealing element 2331 abuts against the insulating element 2332, thereby enabling the sealing element 2331 and the insulating element 2332 to form a continuous insulating and sealing barrier, increasing the sealing and insulation boundary, and enhancing the sealing and insulation performance. Moreover, the mutual abutment of the sealing element 2331 and the insulating element 2332 also allows them to support each other, which helps to improve the installation stability and reliability of the sealing element 2331 and the insulating element 2332 between the electrode body 232 and the second through hole 201, thereby enhancing the overall stability of the insulating and sealing structure 233 and improving the reliability of the battery cell 20.

[0141] In some embodiments of this application, referring to FIG4, the orifice size formed by the first hole segment 2011 gradually decreases in the direction from the inside to the outside of the second through hole 201.

[0142] In the above technical solution, the first hole segment 2011 can be a shrinkage hole structure, thereby applying a reaction force towards the inside of the housing component 21 to the electrode body 232. When the battery cell 20 operates for a long time, causing an increase in internal air pressure, the electrode body 232 experiences a pull-out force towards the outside of the housing component 21. Alternatively, when the electrode body 232 is subjected to an outward pull-out force due to external forces from connecting to external contacts or other electrical components, the first hole segment 2011, with the aforementioned structure, can limit and constrain the electrode body 232, reducing the probability of the electrode body 232 detaching from the second through hole 201, thus improving the overall reliability of the electrode component 23. Furthermore, due to the constraint effect of the first hole segment 2011 on the electrode body 232, the electrode body 232 can further act on the insulating sealing structure 233, thereby further compressing the insulating sealing structure 233 and improving the sealing effect of the insulating sealing structure 233, which also improves the overall reliability of the electrode component 23.

[0143] Optionally, the pole body 232 can be riveted to the second through hole 201. It is understood that when the pole body 232 is riveted to the second through hole 201, it can compress the insulating sealing structure 233 through localized deformation and expansion. This allows the insulating sealing structure 233 to have a larger compression amount, further enhancing the insulation and sealing effect. Moreover, the pole body 232 has a relatively reliable and stable state after expansion and deformation, which can improve the stability of the compression amount of the insulating sealing structure 233, further enhancing the insulation and sealing effect of the insulating sealing structure 233.

[0144] In some embodiments of this application, referring to FIG4, the second through hole 201 includes a second hole segment 2012, which is connected to the first hole segment 2011 and is closer to the outer side of the housing component 21 relative to the first hole segment 2011. In the direction from the inside to the outside of the second through hole 201, the size of the opening formed by the second hole segment 2012 gradually increases.

[0145] It is understood that the second through hole 201 includes not only the first hole segment 2011 but also the second hole segment 2012. The second hole segment 2012 can be a reduced hole structure from the outside to the inside of the second through hole 201, thus the second through hole 201 is constructed as a "funnel-shaped" hole structure. The circumferential hole wall surface of the second hole segment 2012 can be, but is not limited to, an arc surface, an inclined surface, etc.

[0146] Referring to Figure 5, since the second hole segment 2012 is a shrinkage hole, the upper part of the pole body 232 can be gradually reduced in size during molding. When the pole body 232 is assembled into the second through hole 201, the second hole segment 2012 can cooperate with the upper part of the pole body 232 and play a limiting role, so that the pole body 232 can be stably and reliably placed in the second through hole 201 before riveting, and the positioning accuracy of the pole body 232 can also be improved. Then, by applying force to the pole body 232 from top to bottom, the lower part of the pole body 232 can be deformed and expanded to the periphery, thereby riveting the pole body 232 onto the adapter 231. Under the constraint of the first hole segment 2011 and the second hole segment 2012 in opposite directions, the connection between the pole body 232 and the adapter 231 is more reliable and less prone to loosening.

[0147] In the above technical solution, the second hole segment 2012 has a larger external dimension and a smaller internal dimension, which is beneficial for installing the pole body 232 into the second through hole 201, reducing the installation difficulty of the pole body 232. At the same time, it can also limit and constrain the pole body 232 towards the outside of the housing component 21, reducing the probability of the pole body 232 shifting towards the inside of the housing component 21, which is beneficial for improving the installation reliability of the pole body 232. Moreover, the insulating component 2332 is installed in the second hole segment 2012. The structure of the second hole segment 2012 also facilitates the installation of the insulating component 2332 and can support the insulating component 2332 relatively stably and reliably, which is beneficial for the pre-assembly of the insulating component 2332 onto the adapter 231.

[0148] In some embodiments of this application, referring to FIG4, the insulating member 2332 includes a first insulating part 2021 and a second insulating part 2022 connected together. The first insulating part 2021 is insulatingly fitted between the first hole segment 2011 and the pole body 232, and the second insulating part 2022 is insulatingly fitted between the second hole segment 2012 and the pole body 232.

[0149] The first insulating part 2021 and the second insulating part 2022 can refer to dividing the insulating member 2332 into two parts. Due to the first hole segment 2011 and the second hole segment 2012, the second through hole 201 has an overall "funnel-shaped" structure. The first insulating part 2021 is insulated between the first hole segment 2011 and the pole body 232, thereby allowing the insulating member 2332 to pass through the waist position of the funnel-shaped hole. However, the stress between the waist position and the pole body 232 is relatively large. If the sealing member 2331 is placed at the waist position, there is a risk that the compression of the sealing member 2331 will be too large, causing the pole body 232 to come out of the adapter 231. By placing the first insulating part 2021 at the waist position, the pole body 232 can be better supported, which can reduce the risk of the pole body 232 coming out of the second through hole 201.

[0150] In the above technical solution, since the connection position of the first hole segment 2011 and the second hole segment 2012 is the position of maximum stress between the first hole segment 2011 and the electrode body 232, the first insulating part 2021 is provided in the first hole segment 2011 and the second insulating part 2022 is provided in the second hole segment 2012. Thus, the insulating part 2332 can cover the connection position of the first hole segment 2011 and the second hole segment 2012, which can better support the electrode body 232. This can improve the installation stability and reliability of the electrode body 232 in the second through hole 201, thereby improving the overall reliability of the battery cell 20.

[0151] In some embodiments of this application, referring to FIG4, the battery cell 20 has a first direction X parallel to the first shell wall 2101, the electrode body 232 has an inner end 232a close to the electrode component 22, the portion of the inner end 232a that contacts the seal 2331 has a maximum dimension W1 in the first direction X, and the first hole segment 2011 has a minimum dimension W2 in the first direction X, wherein W1≥W2+2*t1, 0.5mm≤t1≤1mm.

[0152] It is understandable that t1 can be, but is not limited to, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, etc. If t1 is less than 0.5mm and W1 is greater than W2, the risk of the pole body 232 displacing outward from the second through hole 201 increases when the pole body 232 is subjected to an outward pulling force, and the compression of the insulating sealing structure 233 exceeds the limit and damages the seal 2331 and the insulating component 2332. This increases the probability of the pole body 232 displacing outward from the housing component 21 and detaching from the second through hole 201, resulting in a higher probability of detachment and affecting the installation reliability of the pole body 232. If t1 is greater than 1 mm and W1 is significantly larger than W2, while ensuring that the electrode body 232 does not easily come out of the second through hole 201, the larger size of W1 is not conducive to keeping the inner end 232a of the electrode body 232 and the surface of the adapter 231 located inside the housing component 21 flush. This will not only occupy more space inside the housing component 21 and affect the size of the electrode component 22, thus affecting the energy density of the battery cell 20, but also occupy more material and increase costs.

[0153] In the above technical solution, by setting the dimensions W1 and W2 within the above range, the maximum dimension of the part of the inner end 232a that contacts the seal 2331 in the first direction X is greater than the minimum dimension of the first hole segment 2011 in the first direction X. This reduces the risk of the electrode body 232 coming out of the second through hole 201. At the same time, it is also beneficial to make the inner end 232a of the electrode body 232 close to the surface of the adapter 231, reduce the space occupied inside the housing component 21, and improve the energy density of the battery cell 20.

[0154] In some embodiments of this application, referring to FIG4, the maximum dimension of the first hole segment 2011 in the first direction X is W3, wherein W3≥W1+2*t2, and t2 is the thickness of the seal 2331 after compression.

[0155] Since the wall surface of the first hole segment 2011 is an arc-shaped or inclined surface, and the sealing element 2331 is tightly attached to the wall surface of the first hole segment 2011, the thickness direction of the sealing element 2331 is perpendicular to the wall surface of the first hole segment 2011 (see Figure 4). This can be simply understood as the thickness direction of the sealing element 2331 being inclined relative to the first direction X. Therefore, by setting W3 to be greater than or equal to W1 + 2 * t2, it can be ensured that the inner end 232a of the pole body 232 can be assembled into the interior of the first hole segment 2011 after compressing the sealing element 2331. As an example, t2 can be, but is not limited to, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, etc.

[0156] In the above technical solution, by setting W3 and W1 within the above range, the compression of the seal 2331 can be guaranteed while ensuring that the pole body 232 and the seal 2331 can be installed into the first hole section 2011.

[0157] In some embodiments of this application, referring to FIG4, the wall of the first hole segment 2011 is an inclined wall that is inclined relative to the first shell wall 2101, and the included angle between the first hole segment 2011 and the first shell wall 2101 is θ1; the adapter 231 includes a main body 2311 and a protrusion 2312. On the outside of the second through hole 201, the protrusion 2312 protrudes relative to the main body 2311 and is provided with the second through hole 201. In the direction from the inside to the outside of the second through hole 201, the size of the portion of the sealing member 2331 located in the second through hole 201 is H1, the size of the main body 2311 is H2, and the size of the first hole segment 2011 is H3, wherein H3≥H2≥H1, H3 / tan(π-θ1)=1 / 2(W3-W2).

[0158] The main body 2311 can refer to the main structure of the adapter 231, and the protrusion 2312 can refer to a structure that protrudes from the surface of the main body 2311. For example, the main body 2311 can be a plate, and the protrusion 2312 can be a boss provided on the main body 2311. Referring to the foregoing, the ranges of W3 and W2 can be determined according to the foregoing embodiments, and θ1 can be calculated using the formula H3 / tan(π-θ1)=1 / 2(W3-W2).

[0159] In the above technical solution, by setting H3, H2, and H1 within the aforementioned range, the electrode body 232 and the seal 2331 can have a longer sealing boundary in the direction from the inside to the outside of the second through hole 201. This improves sealing reliability and ensures that the seal 2331 does not exceed the contact position between the first hole segment 2011 and the second hole segment 2012, reducing the risk of the electrode body 232 detaching from the second through hole 201 and improving the installation reliability of the electrode body 232. θ1 can be calculated using the formula H3 / tan(π-θ1)=1 / 2(W3-W2), thus ensuring that the design of the inclined surface meets the requirements, allowing the electrode body 232 to have a larger compression amount on the seal 2331, and providing a better constraint and limiting effect on the electrode body 232.

[0160] In some embodiments of this application, referring to FIG4, the insulating member 2332 includes a third insulating portion 2023, which is connected to the second insulating portion 2022 and is insulatingly fitted between the outer side 231a of the adapter 231 away from the first shell wall 2101 and the pole body 232.

[0161] In the above technical solution, the insulating component 2332 is composed of three parts: a first insulating part 2021, a second insulating part 2022, and a third insulating part 2023. As a result, the insulating component 2332 has a longer dimension on the inner contour line of the adapter 231 located inside the second through hole 201. This can increase the insulation boundary between the insulating component 2332 and the adapter 231 and the terminal body 232, enhance the insulation protection performance of the insulating component 2332 between the terminal body 232 and the adapter 231, thereby improving the reliability of the terminal component 23 and the overall reliability of the battery cell 20.

[0162] In some embodiments of this application, referring to FIG4, the hole wall of the first hole segment 2011 is an inclined wall that is inclined relative to the first shell wall 2101; and / or, the hole wall of the second hole segment 2012 is an inclined wall that is inclined relative to the first shell wall 2101.

[0163] It is understandable that in the structure of the second through hole 201, only the hole wall of the first hole segment 2011 can be an inclined wall that is inclined relative to the first shell wall 2101, and the hole wall of the second hole segment 2012 can be a vertical wall or a wall surface of other shapes; or, only the hole wall of the second hole segment 2012 can be an inclined wall that is inclined relative to the first shell wall 2101, and the hole wall of the first hole segment 2011 can be an arc-shaped surface or a wavy surface; or, the hole wall of the first hole segment 2011 can be an inclined wall that is inclined relative to the first shell wall 2101, and the hole wall of the second hole segment 2012 can also be an inclined wall that is inclined relative to the first shell wall 2101.

[0164] The above technical solution can provide more options for the design of the first hole segment 2011 and the second hole segment 2012, enhance the design flexibility of the first hole segment 2011 and the second hole segment 2012, and help meet different usage needs.

[0165] In some embodiments of this application, referring to FIG4, the seal 2331 includes a first sealing part 2031 and a second sealing part 2032 connected together. The first sealing part 2031 is sealed between the first hole section 2011 and the electrode body 232, and the second sealing part 2032 is sealed on the inner side 231b of the adapter 231 near the electrode component 22.

[0166] It is understandable that the seal 2331 can be composed of two parts: a first sealing part 2031 and a second sealing part 2032. The first sealing part 2031 can seal between the first hole section 2011 and the electrode body 232, and the second sealing part 2032 can seal the wall surface of the adapter 231 located inside the housing component 21. Thus, the sealing boundary of the seal 2331 is the sum of the sealing boundary between the first sealing part 2031 and the electrode body 232 and the sealing boundary between the second sealing part 2032 and the adapter 231. Moreover, the connection between the first sealing part 2031 and the second sealing part 2032 can cover the contact position between the first hole section 2011 and the inner surface 231b, reducing the risk of electrolyte leakage from the first hole section 2011 or external moisture, particles, etc. directly entering the interior of the housing component 21 from the first hole section 2011.

[0167] In the above technical solution, the sealing element 2331 with the above structure can increase the sealing boundary of the sealing element 2331, which is beneficial to increase the sealing surface. The sealing element 2331 has a more comprehensive covering effect on the first hole section 2011, thereby reducing the risk of sealing failure and thus enhancing the sealing effect, improving the reliability of the pole component 23, and thus improving the reliability of the battery cell 20.

[0168] In some embodiments of this application, referring to Figures 6 and 7, the battery cell 20 includes a first insulating structure 24, which includes a connected body portion 241 and an extension portion 242. The body portion 241 is disposed on the inner side 231b of the adapter 231 near the electrode component 22, and the extension portion 242 is insulatedly fitted between the first hole segment 2011 and the electrode post body 232.

[0169] The first insulating structure 24 can refer to a structure or component that provides insulation between the adapter 231, the pole body 232, and the components inside the housing 21, and may include, but is not limited to, insulating films, insulating sheets, or insulating boards. The material of the first insulating structure 24 may be, but is not limited to, plastic or ceramic.

[0170] The main body 241 can refer to the main structure of the first insulating structure 24, and the extension 242 can refer to the portion that extends into the space between the first hole 2011 and the pole body 232 relative to the main body 241. The main body 241 can be a flat plate-shaped structure (see Figure 6) or a non-standard structure adapted to the shape of the adapter 231 (see Figure 7).

[0171] For example, referring to FIG7, in the structure of the adapter 231, the protrusion 2312 can protrude from both ends of the main body 2311 in the third direction Z. Correspondingly, the main body 241 is provided with a bent portion 2411 that matches the shape of the protrusion 2312, and the bent portion 2411 is connected to the extension 242. In this structure, the second through hole 201 formed by the edge contour on the inner side of the protrusion 2312 has a larger size in the third direction Z, thereby providing more space to arrange a larger size sealing element 2331, insulating element 2332, and extension 242, which can enhance the insulation and sealing effect and improve the reliability of the pole member 23.

[0172] It should be noted that, since the first insulating structure 24 is usually a plastic part with a certain rigidity and strength, in the above scheme, the extension 242 and the inner end 232a of the pole body 232 near the inner side of the housing component 21 cooperate to press against the bottom of the first hole section 2011. In this way, while ensuring the reliable installation of the pole body 232 and the bottom of the first hole section 2011, the plastic deformation of the pole body 232 during riveting can be reduced, which helps to reduce the processing difficulty of the pole body 232, reduce manufacturing costs, and improve the product yield of the pole component 23.

[0173] In the above technical solution, during the riveting and pressing of the sealing member 2331 onto the electrode body 232, the insulating member 2332 can provide support and limit the sealing member 2331 on the side facing outward from the housing component 21. The extension 242 of the first insulating structure 24 can also provide support and limit the sealing member 2331 on the other side facing inward from the housing component 21, thus reducing the probability of excessive compression of the sealing member 2331 and further improving the reliability of the electrode component 23. Moreover, the extension 242 of the first insulating structure 24 helps reduce plastic deformation during riveting of the electrode body 232, reducing the difficulty of the riveting process and consequently the manufacturing difficulty of the electrode component 23. The first insulating structure 24 can also provide insulation on the side of the adapter 231 facing inward from the housing component 21, reducing the risk of short circuits between the adapter 231 and the first housing wall 2101 and the electrode component 22, further improving the reliability of the battery cell 20.

[0174] In some embodiments of this application, referring to Figures 6 and 7, the sealing member 2331 includes a first sealing part 2031 and a second sealing part 2032 connected together. The first sealing part 2031 is sealed between the first hole section 2011 and the pole body 232, and the second sealing part 2032 is sealed between the second hole section 2012 and the pole body 232. The insulating member 2332 is insulatingly fitted between the second hole section 2012 and the pole body 232.

[0175] In the above technical solution, the sealing element 2331, composed of the first sealing part 2031 and the second sealing part 2032, is generally V-shaped and can fit into the waist position of the second through hole 201. This creates a V-shaped sealing interface between the sealing element 2331 and the second through hole 201. This sealing result is more complex than a straight interface, increasing the difficulty for moisture, dust, and other particles to pass through, thereby enhancing the sealing effect and further improving the overall sealing reliability of the electrode post component 23, and thus improving the reliability of the battery cell 20. Furthermore, the waist position of the electrode post body 232 and the second through hole 201 has greater stress, which allows the sealing element 2331 to have a greater compression amount, further enhancing the sealing performance of the sealing element 2331 between the electrode post body 232 and the second through hole 201, and improving the reliability of the battery cell 20.

[0176] In some embodiments of this application, referring to Figures 6 and 7, the insulating member 2332 includes a first insulating portion 2021 and a second insulating portion 2022 connected together. The first insulating portion 2021 is insulatingly fitted between the second hole segment 2012 and the pole body 232, and the second insulating portion 2022 is insulatingly fitted between the outer side 231a of the adapter 231 away from the first shell wall 2101 and the pole body 232.

[0177] In the above technical solution, the insulating component 2332 not only serves as insulation between the second hole section 2012 and the electrode body 232, but also serves as insulation between the electrode body 232 and the outer surface 231a of the adapter 231. This increases the insulation interface of the insulating component 2332, that is, increases the insulation range, thereby improving the insulation reliability of the electrode component 23 and thus improving the reliability of the battery cell 20.

[0178] In some embodiments of this application, referring to Figures 4, 6 and 7, the pole body 232 includes a first pole portion 2321 and a second pole portion 2322 connected together. The first pole portion 2321 is disposed in the first hole section 2011 and is sealed with the sealing member 2331. The second pole portion 2322 is disposed in the second hole section 2012 and is insulated from the insulating member 2332. In the direction from the inside to the outside of the second through hole 201, the size of the first pole portion 2321 gradually decreases and the size of the second pole portion 2322 gradually increases.

[0179] This can be understood as follows: the circumferential profile of the first pole post 2321 matches the shape of the first hole segment 2011, and can be, but is not limited to, an arc surface or a slope; the circumferential profile of the second pole post 2322 matches the shape of the second hole segment 2012, and can also be, but is not limited to, an arc surface or a slope. For example, referring to Figures 4, 6, and 7, both the circumferential profile of the first pole post 2321 and the circumferential profile of the second pole post 2322 are slopes.

[0180] In the above technical solution, the shape of the pole body 232 is matched with the shape of the first hole section 2011 and the second hole section 2012, thereby improving the fit of the pole body 232 to the sealing element 2331 and the insulating element 2332, enhancing the riveting and pressing effect, and thus improving the reliability of sealing and insulation.

[0181] In some embodiments of this application, referring to Figures 4, 6 and 7, the pole body 232 includes a third pole portion 2323 disposed on the outside of the housing component 21. The third pole portion 2323 is connected to the second pole portion 2322 and is arranged circumferentially around the second pole portion 2322. The third pole portion 2323 and the outer side 231a of the adapter 231 away from the first housing wall 2101 are insulated from each other by an insulating member 2332.

[0182] In the above technical solution, the third electrode post 2323 can be pressed against the outside of the adapter 231 and cooperate with the first electrode post 2321 to clamp the adapter 231, while simultaneously pressing the sealing member 2331 and the insulating member 2332. A portion of the insulating member 2332 can provide insulation between the third electrode post 2323 and the adapter 231, reducing the risk of short circuits between them. This improves the insulation reliability of the electrode post component 23, thereby enhancing the reliability of the battery cell 20.

[0183] In some embodiments of this application, referring to Figures 8 and 9, in the direction from the inside to the outside of the second through hole 201, the adapter 231 has an outer side surface 231a and an inner side surface 231b, one end of the first hole segment 2011 is connected to the inner side surface 231b, and the other end is connected to the outer side surface 231a.

[0184] It is understood that the second through hole 201 only includes the first hole segment 2011, and the first hole segment 2011 is connected to the outer side 231a of the adapter 231 at one end near the outside of the housing component 21, while the other end near the inside of the housing component 21 is connected to the inner side 231b of the adapter 231.

[0185] Referring to Figure 9, in the above technical solution, during the pre-forming stage, the inner end 232a of the pole post body 232 near the housing component 21 can be pre-formed into a shape that matches the first hole segment 2011, such as a cone shape, and the outer end of the pole post body 232 near the outer side of the housing component 21 can be grooved. During the process of riveting the pole post body 232 to the adapter 231, only the outer end of the pole post body 232 can undergo riveting deformation. This method of applying riveting deformation to the outer side of the pole post body 232 encounters fewer obstacles and is easier to rivet, which can reduce the riveting forming difficulty of the pole post body 232 and improve the manufacturability of the pole post component 23.

[0186] In the above technical solution, the overall structure of the second through hole 201 is relatively simple, which simplifies the manufacturing process, improves manufacturability, and reduces manufacturing difficulty and cost. Since the second through hole 201 is a compression hole structure, all positions on the inner peripheral wall of the second through hole 201 have a compressive effect on the insulating sealing structure 233, allowing the insulating sealing structure 233 to have a larger compressed area and thus a greater range of compression. This enhances insulation and sealing performance, improves the reliability of the electrode post component 23, and consequently improves the reliability of the battery cell 20.

[0187] In some embodiments of this application, referring to FIG8, the other end of the first hole segment 2011 is connected to the outer surface 231a by a circular arc transition or a right angle transition.

[0188] In the above technical solution, the stress concentration can be alleviated by connecting the first hole section 2011 and the outer side surface 231a with a circular arc transition or a right angle transition, thereby improving the reliability of the adapter 231. It can also reduce the risk of stress concentration and damage to the insulation sealing structure 233 caused by the pole body 232 during the riveting process, thereby improving the reliability of the insulation sealing structure 233.

[0189] In some embodiments of this application, referring to FIG8, the insulating sealing structure 233 includes a sealing member 2331 and an insulating member 2332. The insulating member 2332 is disposed on the side of the sealing member 2331 away from the electrode component 22. The insulating member 2332 is insulatingly fitted between the first hole section 2011 and the electrode body 232, and the sealing member 2331 is sealingly fitted between the first hole section 2011 and the electrode body 232.

[0190] In the above technical solution, the insulating component 2332 has greater rigidity and strength than the sealing component 2331. Therefore, the insulating component 2332 can play a supporting role between the electrode body 232 and the second through hole 201. That is to say, when the electrode body 232 presses the sealing component 2331 into the first hole section 2011 by riveting, the insulating component 2332 can play a supporting and limiting role, reducing the risk of excessive compression of the sealing component 2331, thereby reducing the probability of damage caused by excessive compression of the sealing component 2331 and affecting the sealing performance. This is beneficial to improving the sealing performance between the electrode body 232 and the adapter 231, thereby improving the reliability of the battery cell 20.

[0191] In some embodiments of this application, referring to FIG8, in the direction from the inside to the outside of the second through hole 201, the size of the sealing member 2331 in the first hole section 2011 is larger than the size of the insulating member 2332 in the first hole section 2011.

[0192] In the above technical solution, the size of the sealing element 2331 is larger than that of the insulating element 2332, which can enhance the sealing performance between the pole body 232 and the second through hole 201, and help meet the requirement that the pole component 23 has higher sealing performance.

[0193] In some embodiments of this application, referring to FIG8, the seal 2331 includes a first sealing part 2031 and a second sealing part 2032 connected together. The first sealing part 2031 is sealed between the first hole section 2011 and the electrode body 232, and the second sealing part 2032 is provided on the side of the adapter 231 near the electrode component 22.

[0194] In the above technical solution, the sealing element 2331 with the above structure can increase the sealing boundary of the sealing element 2331, which is beneficial to increase the sealing surface. The sealing element 2331 has a more comprehensive covering effect on the first hole section 2011, thereby reducing the risk of sealing failure and thus enhancing the sealing effect, improving the reliability of the pole component 23, and thus improving the reliability of the battery cell 20.

[0195] In some embodiments of this application, referring to FIG8, the insulating member 2332 includes a first insulating portion 2021 and a second insulating portion 2022 connected together. The first insulating portion 2021 is insulatingly fitted between the first hole segment 2011 and the pole body 232, and the second insulating portion 2022 is insulatingly fitted between the outer side surface 231a of the adapter 231 away from the first shell wall 2101 and the pole body 232.

[0196] In the above technical solution, the insulating component 2332 is composed of two parts: a first insulating part 2021 and a second insulating part 2022. Thus, the insulating component 2332 has a longer dimension on the inner contour line of the adapter 231 located inside the second through hole 201. This can increase the insulation boundary between the insulating component 2332 and the adapter 231 and the terminal body 232, enhance the insulation protection performance of the insulating component 2332 between the terminal body 232 and the adapter 231, thereby improving the reliability of the terminal component 23 and the overall reliability of the battery cell 20.

[0197] In some embodiments of this application, referring to FIG8, the orifice size formed by the first hole segment 2011 gradually decreases in the direction from the inside to the outside of the second through hole 201.

[0198] In the above technical solution, the first hole segment 2011 can be a shrinkage hole structure, thereby applying a reaction force towards the inside of the housing component 21 to the electrode body 232. When the battery cell 20 operates for a long time, causing an increase in internal air pressure, the electrode body 232 experiences a pull-out force towards the outside of the housing component 21. Alternatively, when the electrode body 232 is subjected to an outward pull-out force due to external forces from connecting to external contacts or other electrical components, the first hole segment 2011, with the aforementioned structure, can limit and constrain the electrode body 232, reducing the probability of the electrode body 232 detaching from the second through hole 201, thus improving the overall reliability of the electrode component 23. Furthermore, due to the constraint effect of the first hole segment 2011 on the electrode body 232, the electrode body 232 can further act on the insulating sealing structure 233, thereby further compressing the insulating sealing structure 233 and improving the sealing effect of the insulating sealing structure 233, which also improves the overall reliability of the electrode component 23.

[0199] In some embodiments of this application, referring to FIG8, the pole body 232 includes a first pole portion 2321, which is disposed in the first hole section 2011 and is insulated and sealed with the first hole section 2011 by an insulating sealing structure 233. The size of the first pole portion 2321 gradually decreases in the direction from the inside to the outside of the second through hole 201.

[0200] This can be understood as follows: the circumferential profile of the first pole post 2321 matches the shape of the first hole segment 2011, and can be, but is not limited to, an arc surface or a slope; the circumferential profile of the second pole post 2322 matches the shape of the second hole segment 2012, and can also be, but is not limited to, an arc surface or a slope. For example, referring to FIG8, both the circumferential profile of the first pole post 2321 and the circumferential profile of the second pole post 2322 are slopes.

[0201] In the above technical solution, the shape of the pole body 232 is matched with the shape of the first hole segment 2011, which can improve the fit of the pole body 232 to the insulating sealing structure 233, enhance the riveting and pressing effect, and thus improve the reliability of sealing and insulation.

[0202] In some embodiments of this application, referring to FIG8, the pole body 232 includes a second pole portion 2322 disposed on the outside of the housing component 21. The second pole portion 2322 is connected to the first pole portion 2321 and is arranged circumferentially around the second pole portion 2322. The second pole portion 2322 is insulatedly connected to the adapter 231 through an insulating sealing structure 233.

[0203] In the above technical solution, the second electrode post 2322 can be pressed against the outside of the adapter 231 and cooperate with the first electrode post 2321 to clamp the adapter 231, while simultaneously pressing the insulating sealing structure 233. The insulating sealing structure 233 can provide insulation between the second electrode post 2322 and the adapter 231, reducing the risk of short circuit between the second electrode post 2322 and the adapter 231, which is beneficial to improving the insulation reliability of the electrode post component 23, and thus improving the reliability of the battery cell 20.

[0204] In some embodiments of this application, referring to FIG4, the hole wall of the first hole segment 2011 is an inclined wall that is inclined relative to the first shell wall 2101, and the included angle between the first hole segment 2011 and the first shell wall 2101 is θ1, wherein 120 degrees ≤ θ1 ≤ 130 degrees.

[0205] The wall of the first hole section 2011 is an inclined wall. The inner wall of the first hole section 2011 with this structure is relatively regular and has good manufacturability. It can reduce the processing difficulty of the first hole section 2011, which is conducive to reducing costs and improving product yield.

[0206] θ1 can be, but is not limited to, 120 degrees, 121 degrees, 122 degrees, 123 degrees, 124 degrees, 125 degrees, 126 degrees, 127 degrees, 128 degrees, 129 degrees, 130 degrees, etc.

[0207] Understandably, if θ1 is less than 120 degrees, the inclination angle of the hole wall of the first hole segment 2011 relative to the first shell wall 2101 is small, the compressive force exerted on the insulating sealing structure 233 when the pole body 232 is riveted is small, the effect of increasing the compression of the insulating sealing structure 233 is poor, and the effect of reducing the probability of insulation and sealing failure between the pole body 232 and the adapter 231 is not very obvious; moreover, the inclination angle of the first hole segment 2011 relative to the first shell wall 2101 is relatively small, so the constraint effect of the first hole segment 2011 on the inner end 232a of the pole body 232 is not strong, and the probability of the pole body 232 detaching from the second through hole 201 when the pole body 232 is subjected to an outward pull-out force is not very good.

[0208] If θ1 is greater than 130 degrees, the inclination angle of the hole wall of the first hole section 2011 relative to the first shell wall 2101 is relatively large. A large inclination angle will cause functional waste and increase the processing difficulty of the second through hole 201, thereby increasing the cost. Moreover, a large inclination angle will also cause the minimum size of the second through hole 201 to be further reduced, thereby affecting the minimum size of the pole body 232, which in turn affects the flow capacity of the pole body 232, thus affecting the performance of the pole body 232. Furthermore, it will weaken the strength of the pole body 232 and affect the reliability of the pole body 232.

[0209] In the above technical solution, by setting the first hole segment 2011 as an inclined wall, good manufacturability is achieved. By setting the included angle between the first hole segment 2011 and the first shell wall 2101 within the above-mentioned range, the periphery of the electrode body 232 can have a large amount of compression on the insulating sealing structure 233, thereby achieving a high insulation and sealing effect. Moreover, it also effectively reduces the probability of the electrode body 232 being pulled out of the second through hole 201 by the pull-out force. At the same time, it can also make the size of the second through hole 201 appropriate, which is conducive to the size design of the electrode body 232 meeting high strength and rigidity requirements, thereby improving the reliability of the electrode component 23 and the reliability of the battery cell 20.

[0210] In some embodiments of this application, referring to Figures 4, 5 to 9, the battery cell 20 includes a first insulating structure 24, which is disposed on the inner side 231b of the adapter 231 near the electrode component 22.

[0211] The explanation of the first insulating structure 24 is given in the previous embodiment.

[0212] In the above technical solution, the first insulating structure 24 can provide insulation to the inner side 231b of the adapter 231 facing the housing component 21, thereby reducing the risk of short circuit between the adapter 231 and the first housing wall 2101 and the electrode component 22, and improving the reliability of the battery cell 20.

[0213] In some embodiments of this application, referring to Figures 6 and 7, the battery cell 20 includes a first insulating structure 24, which includes a connected body portion 241 and an extension portion 242. The body portion 241 is disposed on the inner side 231b of the adapter 231 near the electrode component 22, and the extension portion 242 is insulatedly fitted between the first hole segment 2011 and the electrode post body 232.

[0214] It is understood that, in conjunction with the embodiments described above, whether the sealing member 2331 covers the waist position of the second through hole 201 or is located on one side of the waist position of the second through hole 201, the extension 242 of the first insulating structure 24 can be located between the first hole segment 2011 and the pole body 232.

[0215] In the above technical solution, on the one hand, the extension 242 of the first insulating structure 24 can support the pole body 232, providing a limiting effect for the pole body 232 to compress the insulating sealing structure 233, reducing the risk of excessive compression of the insulating sealing structure 233 by the pole body 232, thereby reducing the probability of the insulating sealing structure 233 being damaged and improving the reliability of the insulating sealing structure 233. For example, the insulating sealing structure 233 may include a sealing element 2331 and an insulating element 2332. The first insulating structure 24 and the insulating element 2332 can limit the sealing element 2331 at both ends in the third direction Z, thereby reducing the risk of excessive compression when the pole body 232 squeezes the sealing element 2331.

[0216] On the other hand, the first insulating structure 24 can be installed in conjunction with the pole body 232 at one end of the first hole section 2011 near the housing component 21, thereby reducing the amount of plastic deformation of the inner end 232a of the pole body 232, which helps to reduce the processing difficulty of the pole body 232 and thus enhances the manufacturability of the pole component 23.

[0217] In some embodiments of this application, referring to Figures 6 and 7, the battery cell 20 includes a second insulating structure 25, which is insulatingly fitted between the outer side 231a of the adapter 231 away from the first shell wall 2101 and the peripheral side of the electrode body 232.

[0218] The second insulation structure 25 can refer to a structure or component that provides insulation to the outside of the adapter 231, thereby reducing the risk of short circuit between the adapter 231 and the terminal body 232. The material of the second insulation structure 25 can include, but is not limited to, plastics (e.g., polycarbonate, polypropylene, polyvinyl chloride, etc.), rubber (e.g., EPDM rubber, nitrile rubber, etc.), ceramics (e.g., alumina ceramics, boron nitride ceramics, etc.), etc. For example, the second insulation structure 25 can refer to plastic overmolded onto the adapter 231 and the terminal body 232.

[0219] In the above technical solution, by setting the second insulating structure 25, insulation can be provided on the outside of the adapter 231, reducing the probability of short circuit between the adapter 231 and the terminal body 232. Moreover, the second insulating structure 25 can also provide protection by sealing the gap between the adapter 231 and the terminal body 232, reducing the risk of external moisture, dust, and other particles entering the terminal component 23 and the housing component 21 along the gap. It can also reduce damage to the adapter 231 caused by mechanical impact, thereby improving the reliability of the terminal component 23 and thus improving the reliability of the battery cell 20.

[0220] In some embodiments of this application, the second insulating structure 25 and the insulating sealing structure 233 are integrally molded. In this technical solution, this construction forms a continuous and closed insulating boundary on the pole body 232, which enhances insulation and sealing performance and helps to firmly fix the pole body 232, thereby improving the installation reliability of the pole body 232. Furthermore, the above structure reduces the number of parts and assembly steps, simplifies the manufacturing process, and thus reduces manufacturing costs.

[0221] In some embodiments of this application, referring to Figures 5 and 9, the electrode body 232 includes a first material component 2041 and a second material component 2042. The second material component 2042 is wrapped around the periphery of the first material component 2041 and the bottom side near the electrode component 22. The second material component 2042 is electrically connected to the electrode component 22.

[0222] The first material component 2041 and the second material component 2042 can refer to components made of different materials, and may include, but are not limited to, copper, aluminum, nickel, etc. The first material component 2041 is made of the same material as the externally welded conductive component (e.g., a electrode plate, etc.). For example, the first material component 2041 can be aluminum, and the second material component 2042 can be copper.

[0223] It is understandable that the electrode body 232 is made of composite material. On the one hand, this structure can balance material cost and conductivity. For example, the second material 2042 located inside the housing component 21 is copper, which can have high conductivity, which is conducive to efficient current conduction between the electrode body 232 and the electrode component 22. On the other hand, the first material 2041 on the outside can be aluminum, which can reduce cost while having good conductivity.

[0224] On the other hand, in order to ensure efficient current conduction between the electrode post 23 and the electrode post 22, the part where the electrode post body 232 and the electrode post 22 are connected is preferably made of a material with high conductivity, which results in higher material costs. The electrode post body 232 needs to be welded to external conductive components. For example, the conductive component can be a bar plate, which is made of aluminum, a material that is cheaper and has better conductivity. In this case, the material of the electrode post is often different from that of the bar plate, which is not conducive to welding. In this case, the electrode post body 232 is composed of two materials: a first material 2041 and a second material 2042. This can satisfy the requirements of efficient current conduction while also facilitating welding to external conductive components.

[0225] In the above technical solution, by setting the electrode body 232 to include a first material component 2041 and a second material component 2042, the electrode body 232 can be a composite material electrode, which can reduce costs while meeting the requirements of efficient current conduction, and also facilitates the welding of the electrode body 232 to external conductive components, thereby improving the manufacturability of the electrode component 23 and increasing the product yield of the electrode component 23.

[0226] In some embodiments of this application, referring to FIG10, the pole body 232 includes a first material component 2041 and a second material component 2042. The second material component 2042 is disposed in the second through hole 201. The first material component 2041 is circumferentially arranged around the first material component 2041 and is provided with an insert 2043 of the same material as the second material component 2042. The insert 2043 is welded to the second material component 2042.

[0227] In the above technical solution, the second material component 2042 can be pre-formed directly in one step and installed in the second through hole 201. The first material component 2041 is on the outside of the adapter 231 and is welded to the second material component 2042 through the insert 2043. Thus, the first material component 2041 and the second material component 2042 can form the pole body 232 by butt welding. The composite material pole body 232 formed by this splicing method has good manufacturability and helps to reduce costs.

[0228] In some embodiments of this application, the first material 2041 is made of aluminum and the second material 2042 is made of copper.

[0229] In the above technical solution, the electrode body 232 is a copper-aluminum composite electrode. Using this composite electrode material not only satisfies the requirement of good conductivity, but also helps to reduce material costs.

[0230] In some embodiments of this application, referring to FIG3, the housing component 21 includes a housing body 211 and a cover plate 212. One end of the housing body 211 is formed with an opening, and the cover plate 212 covers the opening. A first housing wall 2101 is provided on the housing body 211 or the cover plate 212.

[0231] In the above technical solution, the terminal component 23 can be installed on the housing body 211 or on the cover plate 212, which provides more options for the design of the battery cell 20 to meet different requirements.

[0232] In some embodiments of this application, referring to FIG3, the first shell wall 2101 is provided on the cover plate 212. Since the cover plate 212 is welded to the shell body 211 afterward, the first through hole 2102 can be manufactured before the cover plate 212 is installed on the shell body 211. This reduces the processing difficulty of the first through hole 2102, enhances manufacturability, and also helps to improve product yield.

[0233] This application embodiment also provides a battery cell 20, including: a housing component 21, an electrode component 22, and a terminal component 23. The housing component 21 includes a first housing wall 2101, and the first housing wall 2101 is provided with a first through hole 2102. The first through hole 2102 includes a first hole segment 2011. In the direction from the inside to the outside of the first through hole 2102, the size of the orifice formed by the first hole segment 2011 gradually decreases or increases. The electrode component 22 is disposed inside the housing component 21. The terminal component 23 includes a terminal body 232 and an insulating sealing structure 233. The terminal body 232 is disposed in the first through hole 2102 and is insulated and sealed with the first hole segment 2011 by at least part of the insulating sealing structure 233. The terminal body 232 is electrically connected to the electrode component 22.

[0234] Referring to the preceding text, it can be understood that the terminal component 23 does not have an adapter 231, the first hole segment 2011 is formed on the first shell wall 2101, and the terminal body 232 is directly mounted on the first shell wall 2101 through the insulating sealing structure 233. Other structures of the battery cell 20 can be referred to in any of the preceding embodiments, and will not be repeated here.

[0235] In the above technical solution, under the premise that the electrode body 232 can enable the insulation and sealing structure 233 to have a large amount of compression, more options can be provided for the design of the battery cell 20 to meet different requirements.

[0236] This application also provides a battery device 100, including a battery cell 20 as described in any of the preceding embodiments.

[0237] In the above technical solution, since the battery cell 20 has high reliability, the battery device 100 using the battery cell 20 can have good reliability.

[0238] This application also provides an electrical device 1000, including a battery cell 20 as described in any of the preceding embodiments, or a battery device 100 as described in any of the preceding embodiments.

[0239] In the above technical solution, since the battery cell 20 or battery device 100 has high reliability, it is beneficial to improve the reliability of the electrical device 1000 that uses the battery cell 20 or battery device 100.

[0240] Referring to Figures 3, 4 and 11, an embodiment of the present invention provides a battery cell 20, which includes: a housing component 21, an electrode component 22, a terminal component 23 and a first insulating structure 24.

[0241] The housing component 21 includes a first housing wall 2101, and the first housing wall 2101 is provided with a first through hole 2102.

[0242] Electrode component 22 is disposed inside housing component 21.

[0243] The electrode component 23 includes an adapter 231, an electrode body 232, and an insulating sealing structure 233. The adapter 231 is installed in the first through hole 2102 and has a second through hole 201. The second through hole 201 includes a first hole segment 2011 and a second hole segment 2012. The second hole segment 2012 is connected to the first hole segment 2011 and is located closer to the outer side of the housing component 21 relative to the first hole segment 2011. In the direction from the inside to the outside of the second through hole 201, the orifice size formed by the first hole segment 2011 gradually decreases, and the orifice size formed by the second hole segment 2012 gradually increases. The electrode body 232 is riveted to the second through hole 201 and is electrically connected to the electrode component 22. The hole walls of the first hole segment 2011 and the second hole segment 2012 are both inclined walls that are inclined relative to the first housing wall 2101.

[0244] The insulating sealing structure 233 includes a sealing element 2331 and an insulating element 2332. The sealing element 2331 includes a first sealing portion 2031 and a second sealing portion 2032 connected together. The first sealing portion 2031 is sealed between the first hole segment 2011 and the electrode body 232. The second sealing portion 2032 is sealed on the inner surface 231b of the adapter 231 near the electrode component 22. The insulating element 2332 includes a first insulating portion 2021, a second insulating portion 2022, and a third insulating portion 2023 connected together. The first insulating portion 2021 is insulatingly fitted between the first hole segment 2011 and the electrode body 232. The second insulating portion 2022 is insulatingly fitted between the second hole segment 2012 and the electrode body 232. The third insulating portion 2023 connects to the second insulating portion 2022 and is insulatingly fitted between the outer surface 231a of the adapter 231 away from the first shell wall 2101 and the electrode body 232.

[0245] The electrode body 232 includes a first electrode portion 2321, a second electrode portion 2322, and a third electrode portion 2323 connected together. The first electrode portion 2321 is disposed within the first hole section 2011 and is sealed to the sealing member 2331. The second electrode portion 2322 is disposed within the second hole section 2012 and is insulated from the insulating member 2332. In the direction from the inside to the outside of the second through hole 201, the size of the first electrode portion 2321 gradually decreases, and the size of the second electrode portion 2322 gradually increases. The third electrode portion 2323 is disposed on the outside of the housing component 21. The third electrode portion 2323 is connected to the second electrode portion 2322 and is circumferentially arranged around the second electrode portion 2322. The third electrode portion 2323 and the outer surface 231a of the adapter 231 away from the first housing wall 2101 are insulated from each other by the insulating member 2332.

[0246] The first insulating structure 24 is a plastic part and is located on the inner side 231b of the adapter 231 near the electrode component 22.

[0247] It should be noted that, referring to Figure 11, in the above technical solution, the electrode body 232 of the electrode post component 23 can first be welded to the electrode tab 221 of the electrode component 22, and then assembled together with the electrode component 22 into the housing component 21. Next, the electrode post component 23 passes through the first through hole 2102 to the outside of the housing component 21, and the adapter 231 is welded to the first housing wall 2101 on the outside of the first housing wall 2101. With this structure, the riveting of the electrode post component 23 can be performed outside the housing component 21, which is beneficial for improving the riveting quality and manufacturability of the electrode post component 23, and can improve the reliability of the electrode post component 23, thereby improving the reliability of the battery cell 20. Secondly, the second through hole 201 adopts the above structure, which can enable the pole post component 23 to have a larger compression amount on the seal 2331, reduce the risk of the seal 2331 having a large compression amount, and reduce the probability of the pole post body 232 coming out of the second through hole 201. This can also improve the reliability of the pole post component 23, and thus improve the reliability of the battery cell 20.

[0248] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, wherein, include: The housing component includes a first housing wall, the first housing wall having a first through hole; An electrode component, wherein the electrode component is disposed within the housing component; The electrode component includes an adapter, an electrode body, and an insulating sealing structure. The adapter is installed in the first through hole and has a second through hole. The second through hole includes a first hole segment. In the direction from the inside to the outside of the second through hole, the orifice size formed by the first hole segment gradually decreases or increases. The electrode body is disposed in the second through hole and is insulated from and sealed to the first hole segment by at least part of the insulating sealing structure. The electrode body is electrically connected to the electrode component.

2. The battery cell according to claim 1, wherein, The insulating sealing structure includes a sealing element and an insulating element. The sealing element is located closer to the inner side of the housing component than the insulating element and is sealed between the pole body and the first hole segment. The insulating element is insulatingly fitted between the pole body and the second through hole.

3. The battery cell according to claim 2, wherein, The sealing element abuts against the insulating element.

4. The battery cell according to claim 2 or 3, wherein, In the direction from the inside to the outside of the second through hole, the orifice size formed by the first hole segment gradually decreases, and the pole body is riveted to the second through hole.

5. The battery cell according to claim 4, wherein, The second through hole includes a second hole segment, which connects to the first hole segment and is located closer to the outer side of the housing component than the first hole segment. In the direction from the inside to the outside of the second through hole, the orifice size formed by the second hole segment gradually increases.

6. The battery cell according to claim 5, wherein, The insulating component includes a first insulating portion and a second insulating portion connected together. The first insulating portion is insulatingly fitted between the first hole segment and the pole body, and the second insulating portion is insulatingly fitted between the second hole segment and the pole body.

7. The battery cell according to claim 6, wherein, The battery cell has a first direction parallel to the first shell wall, the electrode body has an inner end close to the electrode component, the maximum dimension of the portion of the inner end that contacts the seal in the first direction is W1, and the minimum dimension of the first hole segment in the first direction is W2, wherein W1≥W2+2*t1, 0.5mm≤t1≤1mm.

8. The battery cell according to claim 7, wherein, The maximum dimension of the first hole segment in the first direction is W3, where W3 ≥ W1 + 2 * t2, and t2 is the thickness of the seal after compression.

9. The battery cell according to claim 8, wherein, The wall of the first hole segment is an inclined wall that is inclined relative to the first shell wall, and the included angle between the first hole segment and the first shell wall is θ1; the adapter includes a main body and a protrusion. On the outside of the second through hole, the protrusion protrudes relative to the main body and is provided with the second through hole. In the direction from the inside to the outside of the second through hole, the size of the part of the seal located in the second through hole is H1, the size of the main body is H2, and the size of the first hole segment is H3, where H3≥H2≥H1, and H3 / tan(π-θ1)=1 / 2(W3-W2).

10. The battery cell according to any one of claims 6 to 9, wherein, The insulating component includes a third insulating portion, which is connected to the second insulating portion and is insulatedly fitted between the outer surface of the adapter away from the first housing wall and the pole body.

11. The battery cell according to any one of claims 6 to 10, wherein, The wall of the first hole segment is an inclined wall that is inclined relative to the first shell wall; and / or, the wall of the second hole segment is an inclined wall that is inclined relative to the first shell wall.

12. The battery cell according to any one of claims 6 to 11, wherein, The sealing element includes a first sealing portion and a second sealing portion connected together. The first sealing portion is sealed between the first hole segment and the electrode body, and the second sealing portion is sealed on the inner side of the adapter near the electrode component.

13. The battery cell according to claim 5, wherein, The battery cell includes a first insulating structure, which includes a connected body portion and an extension portion. The body portion is disposed on the inner side of the adapter near the electrode component, and the extension portion is insulatedly fitted between the first hole segment and the electrode body.

14. The battery cell according to claim 13, wherein, The sealing element includes a first sealing portion and a second sealing portion connected together. The first sealing portion is sealed and fitted between the first hole segment and the pole body, and the second sealing portion is sealed and fitted between the second hole segment and the pole body. The insulating element is insulatingly fitted between the second hole segment and the pole body.

15. The battery cell according to claim 14, wherein, The insulating component includes a first insulating portion and a second insulating portion connected together. The first insulating portion is insulatingly fitted between the second hole segment and the pole body, and the second insulating portion is insulatingly fitted between the outer side of the adapter away from the first shell wall and the pole body.

16. The battery cell according to any one of claims 5 to 15, wherein, The electrode body includes a first electrode portion and a second electrode portion connected together. The first electrode portion is disposed in the first hole section and is sealed with the sealing element. The second electrode portion is disposed in the second hole section and is insulated from the insulating element. In the direction from the inside to the outside of the second through hole, the size of the first electrode portion gradually decreases and the size of the second electrode portion gradually increases.

17. The battery cell according to claim 16, wherein, The pole body includes a third pole portion disposed on the outside of the housing component. The third pole portion is connected to the second pole portion and is circumferentially arranged around the second pole portion. The third pole portion and the outer side of the adapter away from the first housing wall are insulated from each other by the insulating member.

18. The battery cell according to any one of claims 1 to 17, wherein, In the direction from the inside to the outside of the second through hole, the adapter has an outer side and an inner side, one end of the first hole segment is connected to the inner side and the other end is connected to the outer side.

19. The battery cell according to claim 18, wherein, The other end of the first hole is connected to the outer side surface via a circular arc transition or a right-angle transition.

20. The battery cell according to claim 18 or 19, wherein, The insulating sealing structure includes a sealing element and an insulating element. The insulating element is disposed on the side of the sealing element away from the electrode component. The insulating element is insulatingly fitted between the first hole segment and the electrode body. The sealing element is sealingly fitted between the first hole segment and the electrode body.

21. The battery cell according to claim 20, wherein, In the direction from the inside to the outside of the second through hole, the size of the seal within the first hole segment is larger than the size of the insulator within the first hole segment.

22. The battery cell according to claim 20 or 21, wherein, The sealing element includes a first sealing portion and a second sealing portion connected together. The first sealing portion is sealed between the first hole section and the electrode body, and the second sealing portion is located on the side of the adapter near the electrode component.

23. The battery cell according to claim 20, wherein, The insulating component includes a first insulating portion and a second insulating portion connected together. The first insulating portion is insulatingly fitted between the first hole segment and the pole body, and the second insulating portion is insulatingly fitted between the outer side of the adapter away from the first shell wall and the pole body.

24. The battery cell according to any one of claims 18 to 23, wherein, In the direction from the inside to the outside of the second through hole, the orifice size formed by the first hole segment gradually decreases.

25. The battery cell according to claim 24, wherein, The electrode body includes a first electrode portion, which is disposed within the first hole section and is insulated from and sealed to the first hole section by the insulating sealing structure. The size of the first electrode portion gradually decreases in the direction from the inside to the outside of the second through hole.

26. The battery cell according to claim 25, wherein, The pole body includes a second pole portion disposed on the outside of the housing component. The second pole portion is connected to the first pole portion and is circumferentially arranged around the second pole portion. The second pole portion is insulatedly connected to the adapter through the insulating sealing structure.

27. The battery cell according to any one of claims 1 to 26, wherein, The wall of the first hole segment is an inclined wall that is inclined relative to the first shell wall, and the included angle between the first hole segment and the first shell wall is θ1, wherein 120 degrees ≤ θ1 ≤ 130 degrees.

28. The battery cell according to any one of claims 1 to 12, 17 to 27, wherein, The battery cell includes a first insulating structure, which is disposed on the inner side of the adapter near the electrode component.

29. The battery cell according to claim 28, wherein, The battery cell includes a first insulating structure, which includes a connected body portion and an extension portion. The body portion is disposed on the inner side of the adapter near the electrode component, and the extension portion is insulatedly fitted between the first hole segment and the electrode body.

30. The battery cell according to claim 29, wherein, The battery cell includes a second insulating structure, which is insulatingly fitted between the outer side of the adapter away from the first shell wall and the peripheral side of the electrode body.

31. The battery cell according to claim 30, wherein, The second insulation structure and the insulation sealing structure are integrally molded parts.

32. The battery cell according to any one of claims 1 to 31, wherein, The electrode body includes a first material component and a second material component. The second material component is wrapped around the periphery of the first material component and the bottom side near the electrode component. The second material component is electrically connected to the electrode component.

33. The battery cell according to any one of claims 1 to 31, wherein, The pole body includes a first material component and a second material component. The second material component is disposed in the second through hole. The first material component is arranged circumferentially around the first material component and is provided with an insert of the same material as the second material component. The insert is welded to the second material component.

34. The battery cell according to claim 32 or 33, wherein, The first material component is made of aluminum, and the second material component is made of copper.

35. A single battery cell, wherein, include: The housing component includes a first housing wall, the first housing wall having a first through hole, the first through hole including a first hole segment, and the orifice size formed by the first hole segment gradually decreasing or increasing in the direction from the inside to the outside of the first through hole; An electrode component, wherein the electrode component is disposed within the housing component; The electrode component includes an electrode body and an insulating sealing structure. The electrode body is disposed in the first through hole and is insulated from and sealed to the first hole segment by at least a portion of the insulating sealing structure. The electrode body is electrically connected to the electrode component.

36. A battery device, wherein, Includes the battery cell as described in any one of claims 1 to 35.

37. An electrical appliance, wherein, Includes the battery cell as described in any one of claims 1 to 35, or the battery device as described in claim 36.

Images