Sealing structure, shell assembly, battery and electric device

Abstract

The utility model discloses a kind of sealing structure, shell assembly, battery and electric equipment, sealing structure includes first sealing element and electrically conductive part, first sealing element is used to seal connection shell and electrode terminal, electrically conductive part is located on first sealing element, electrically conductive part is used to electrically connect shell and electrode terminal.The sealing structure of the utility model embodiment, electrically conductive part is arranged on first sealing element, electrode terminal is electrically connected with shell by electrically conductive part, so it not only can pull high potential of shell to avoid shell lithium-embedded corrosion, but also can increase resistance in entire circuit, when short circuit occurs in battery, current in loop can be reduced, thereby reduce the risk of fire and explosion of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a sealing structure, a housing assembly, a battery, and an electrical device. Background Technology

[0002] The electrode core of a single battery cell is typically encapsulated in a casing, but the potential difference between the electrodes and the casing makes the casing susceptible to corrosion. Therefore,

[0003] In existing technologies, the battery terminals are directly welded to the casing to increase the casing's potential and prevent lithium intercalation corrosion. However, this method increases the circuit current when the battery short-circuits, which can easily cause safety hazards such as arcing and fire. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a sealing structure in which a conductive element is provided on a first sealing member. The conductive element is used to electrically connect the housing and the electrode terminals. This arrangement increases the resistance in the entire circuit, and reduces the current in the circuit when the battery short-circuits, thereby reducing the risk of battery fire and explosion.

[0005] According to an embodiment of the present invention, a sealing structure is used for a battery housing assembly. The sealing structure includes a first sealing element and a conductive element. The first sealing element is used to seal and connect the housing and electrode terminals of the housing assembly. The conductive element is disposed on the first sealing element and is used to electrically connect the housing and the electrode terminals.

[0006] According to the sealing structure of this utility model embodiment, a conductive element is provided on the first sealing element. The conductive element is used to electrically connect the shell and the electrode terminals. This not only increases the potential of the shell to avoid lithium intercalation corrosion of the shell, but also increases the resistance in the entire circuit. When the battery is short-circuited, the current in the circuit can be reduced, thereby reducing the risk of battery fire and explosion.

[0007] In some embodiments, the resistance of the conductive element is 5kΩ to 100kΩ; and / or, the conductive element is disposed on the outer peripheral side of the first sealing element; and / or, the conductive element is a conductive coating; and / or, the first sealing element is a ceramic sealing element.

[0008] In some embodiments, the sealing structure further includes: a first connector disposed on the first sealing member, the first connector being used for electrically connecting the electrode terminal and the conductive member; and / or,

[0009] The sealing structure further includes a second connector, which is disposed on the first sealing element and is used to electrically connect the housing and the conductive element.

[0010] In some embodiments, the first connector includes a first connecting portion and a first extension portion connected together, the first seal includes a first end face and a second end face disposed opposite to each other, the first connecting portion is disposed on the first end face and is used for electrical connection with the electrode terminal, and the first extension portion is disposed on the outer peripheral surface of the first seal and is electrically connected with the conductive element.

[0011] In some embodiments, the first connecting portion and the first extension portion are metal layers disposed on the first sealing member, and the conductive member is a conductive coating applied to the first extension portion; and / or

[0012] The width of the first extension is 'a', and the height of the first seal is 'H', where 'a' and 'H' satisfy: 0.1H ≤ a ≤ 0.45H, and the units of 'a' and 'H' are both mm; and / or,

[0013] Both the first sealing element and the first connecting portion include two arc segments and two straight segments, with each straight segment connecting the two arc segments; at least one of the two straight segments of the first connecting portion is connected to the first extension portion, and the first extension portion is provided with a corresponding conductive element, with the first extension portion located on one side of the longitudinal section of the first sealing element and the conductive element being electrically connected.

[0014] In some embodiments, the second connector includes a second connecting portion and a second extension portion connected together, the first seal includes a first end face and a second end face disposed opposite to each other, the second connecting portion is disposed on the second end face and is used for electrical connection with the housing, and the second extension portion is disposed on the outer peripheral surface of the first seal and is electrically connected with the conductive element.

[0015] In some embodiments, the second connecting portion and the second extension portion are metal layers disposed on the first sealing member, and the conductive member is a conductive coating applied to the second extension portion; and / or,

[0016] The width of the second extension is c, and the height of the first seal is H, where c and H satisfy: 0.1H ≤ c ≤ 0.45H, and the units of c and H are both mm; and / or,

[0017] Both the first sealing element and the second connecting portion include two arc segments and two straight segments, with each straight segment connecting between the two arc segments; at least one of the two straight segments of the second connecting portion is connected to the second extension portion, and the second extension portion is provided with a corresponding conductive element, with the second extension portion located on one side of the longitudinal section of the first sealing element and the conductive element being electrically connected.

[0018] In some embodiments, the sealing structure further includes: a first connector, wherein the first seal is sealed to the electrode terminal via the first connector; and / or,

[0019] The sealing structure further includes a second sealing element, wherein the first sealing element is sealed to the housing via the second sealing element; and / or

[0020] The housing assembly further includes a second seal, through which the conductive element is electrically connected to the housing.

[0021] In some embodiments, the conductive element is electrically connected to the electrode terminal via the first connector.

[0022] In some embodiments, the first connector includes a first connecting portion and a first extension portion connected together, the first seal includes a first end face and a second end face disposed opposite to each other, the first connecting portion is disposed on the first end face, the first seal is sealed to the electrode terminal through the first connecting portion, and the first connecting portion is used to electrically connect to the electrode terminal, the first extension portion is disposed on the outer peripheral surface of the first seal, and the first extension portion is electrically connected to the conductive element.

[0023] In some embodiments, the sealing structure further includes: a second connector, wherein the first sealing element is sealingly connected to the second sealing element via the second connector; and / or,

[0024] The sealing structure further includes a second connector, which is disposed on the first sealing element, and the conductive element is electrically connected to the second sealing element through the second connector.

[0025] In some embodiments, the second connector includes a second connecting portion and a second extension portion connected together; the first seal includes a first end face and a second end face disposed opposite to each other; the second connecting portion is disposed on the second end face; the first seal is sealed to the second seal via the second connecting portion, and the second connecting portion is electrically connected to the second seal; the second extension portion is disposed on the outer peripheral surface of the first seal and is electrically connected to the conductive element; and / or,

[0026] The second sealing element includes a body portion, a transition portion, and a flange portion. The body portion and the flange portion are spaced apart along the axial direction of the electrode terminal. The transition portion is connected between the body portion and the flange portion. The body portion is provided with a second through hole, and the electrode terminal is disposed in the second through hole. The body portion is used for sealing connection with the housing. The flange portion is sealed connection with the first sealing element through the second connecting member.

[0027] According to an embodiment of the present invention, a housing assembly includes a housing, an electrode terminal, and the sealing structure described above. The housing has a first through hole, the electrode terminal is disposed in the first through hole, and the sealing structure seals the housing and the electrode terminal to seal the first through hole.

[0028] According to the housing assembly of this utility model embodiment, by adopting the aforementioned sealing structure, the battery's service life and safety performance can be improved.

[0029] In some embodiments, the electrode terminal includes a column and a connecting ring disposed on the outer periphery of the column. The housing has a first through hole, the column is disposed in the first through hole, the first sealing member is sleeved on the column and at least a portion of the first sealing member is located on the side of the connecting ring facing the housing, and the first sealing member is sealed to the connecting ring through the first connecting member.

[0030] In some embodiments, at least a portion of the first seal is located outside the housing, and at least a portion of the second seal is located between the first seal and the housing; and / or,

[0031] The outer surface of the housing is provided with a groove, and at least a portion of the second seal is located in the groove.

[0032] The single-cell battery according to an embodiment of the present invention includes the aforementioned housing assembly.

[0033] According to the embodiments of the present invention, by adopting the aforementioned housing assembly, the service life and safety performance of the single battery can be improved.

[0034] The battery module according to an embodiment of the present invention includes the aforementioned housing assembly.

[0035] According to the embodiments of the present invention, by adopting the aforementioned housing components, the battery module's service life and safety performance can be improved.

[0036] The battery pack according to an embodiment of the present invention includes the aforementioned housing assembly.

[0037] According to the embodiments of the present invention, the battery pack can improve its service life and safety performance by adopting the aforementioned housing assembly.

[0038] The electrical equipment according to the embodiments of the present invention includes the above-described single battery, battery module, or battery pack.

[0039] According to the embodiments of the present invention, by adopting the aforementioned single battery, battery module, or battery pack, the service life and safety performance of the electrical equipment can be improved.

[0040] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0041] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0042] Figure 1 This is a front view of the housing assembly according to an embodiment of the present utility model;

[0043] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0044] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0045] Figure 4 This is a structural diagram of the sealing structure, which only shows the first sealing element, the first connecting element, and the second connecting element;

[0046] Figure 5 This is an exploded view of the sealing structure, which only shows the first sealing element, the first connecting element, the second connecting element, and the conductive element.

[0047] Figure 6 for Figure 4 Side view.

[0048] Figure label:

[0049] 1000. Housing assembly;

[0050] 100. Housing; 101. First through hole; 102. Groove;

[0051] 200. Electrode terminal; 201. Column; 202. Connecting ring;

[0052] 300. First seal; 301. Arc segment of the first seal; 302. Straight segment of the first seal; 303. First end face; 304. Second end face; 305. Outer peripheral surface;

[0053] 400. Conductive components;

[0054] 500. First connector; 501. First connecting portion; 502. First extension portion; 503. Arc segment of the first connecting portion; 504. Straight segment of the first connecting portion;

[0055] 600. Second connector; 601. Second connecting portion; 602. Second extension; 603. Arc segment of the second connecting portion; 604. Straight segment of the second connecting portion;

[0056] 700. Second seal; 701. Body part; 702. Transition part; 703. Flanged part; 704. Second through hole;

[0057] 800. Sealed structure. Detailed Implementation

[0058] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0059] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0060] The housing assembly of an embodiment of the present invention is described below with reference to the accompanying drawings.

[0061] like Figures 1 to 5 As shown, a housing assembly 1000 according to an embodiment of the present invention includes: a housing 100, an electrode terminal 200, and a sealing structure 800. The housing 100 has a first through hole 101, and the electrode terminal 200 is disposed in the first through hole 101. The sealing structure 800 includes a first sealing member 300 and a conductive member 400. The first sealing member 300 seals the housing 100 and the electrode terminal 200 to seal the first through hole 101. The conductive member 400 is disposed on the first sealing member 300 and is used for electrically connecting the housing 100 and the electrode terminal 200.

[0062] The housing 100 includes a housing body and a cover plate. The housing body and the cover plate are connected to form a receiving cavity for accommodating the electrode core. The first through hole 101 can be provided on the housing body or the cover plate. The material of the housing 100 is not limited in this application. For example, it can be an aluminum housing or a steel housing. In addition, the electrode terminal 200 can be a positive terminal or a negative terminal.

[0063] The first sealing element 300 is sealingly connected to both the housing 100 and the electrode terminal 200 to seal the first through hole 101. It is understood that by providing the first sealing element 300 to seal the first through hole 101, foreign objects outside the housing 100 can be prevented from entering the housing 100 or electrolyte leakage from the housing 100. Furthermore, the connection between the first sealing element 300 and the housing 100 can be direct or indirect; for example, the first sealing element 300 can abut against the housing 100, or a metal layer can be provided on the first sealing element 300, with the housing 100 welded to the metal layer, or the housing 100 can be welded to the metal layer via an intermediate connector (such as the second sealing element 700 described below). Similarly, the connection between the first sealing element 300 and the electrode terminal 200 can be direct or indirect; for example, the first sealing element 300 can abut against the electrode terminal 200, or a metal layer can be provided on the first sealing element 300, with the electrode terminal 200 welded to the metal layer.

[0064] A conductive element 400 is disposed on the first sealing element 300, and the electrode terminal 200 is electrically connected to the housing 100 through the conductive element 400. The conductive element 400 can be disposed directly or indirectly on the first sealing element 300, for example, by direct coating onto the first sealing element 300, or by the first connector 500 and / or the second connector 600 described below. The electrode terminal 200 can be electrically connected through direct contact with the conductive element 400 or through an intermediate element (e.g., through the first connector 500 described below). Similarly, the housing 100 can be electrically connected through direct contact with the conductive element 400 or through an intermediate element (e.g., through the second connector 600 and / or the second sealing element 700 described below).

[0065] Compared to existing technologies, the sealing structure 800 of this application, used for the battery housing assembly 1000, provides a conductive element 400 on the first sealing element 300, through which the electrode terminals 200 are electrically connected to the housing 100. This not only raises the potential of the housing 100 to avoid lithium intercalation corrosion of the housing 100, but also increases the resistance in the entire circuit. When the battery short-circuits, it can reduce the current in the circuit, thereby reducing the risk of battery fire and explosion.

[0066] Furthermore, some existing technologies use conductive plastic rings or conductive rubber rings between the electrode and the housing to achieve housing charging. However, due to the poor compressibility of the conductive plastic rings or conductive rubber rings, their contact with the electrode and the housing is poor, resulting in unstable charging of the housing. In this application, by separately setting a conductive element 400 on the first sealing element 300, the influence of the first sealing element 300 itself can be avoided, thus achieving stable charging of the housing 100.

[0067] In some specific examples, the resistance of the conductive element 400 is 5kΩ to 100kΩ. Understandably, this design makes it easier to avoid high-voltage arcing and reduces casing corrosion.

[0068] In some specific examples, such as Figure 4 As shown, the conductive element 400 is disposed on the outer peripheral side of the first sealing element 300. It can be understood that by disposing of the conductive element 400 on the outer peripheral side of the first sealing element 300, the conductive element 400 can be prevented from affecting the connection between the first sealing element 300 and other components in the axial direction of the first sealing element 300.

[0069] In some specific examples, the conductive element 400 is a conductive coating. Understandably, this method is simple to operate and easily improves production efficiency. In other embodiments, the conductive element 400 may also be a metal sheet fixed to the first seal 300.

[0070] The aforementioned conductive coating may include conductive materials and binders. The conductive materials include at least one of the following: metal mixtures, acetylene black, conductive carbon black (Super P), Ketjen black, carbon nanofibers, carbon nanotubes, carbon nanorods, natural graphite, and artificial graphite. The binders include at least one of the following: polyvinylidene fluoride, sodium carboxymethyl cellulose, styrene-butadiene rubber, potassium carboxymethyl cellulose, polyacrylate, polyamide, polyimide, polyamide-imide, sodium alginate, polyvinyl alcohol, polytetrafluoroethylene, and polyacrylonitrile. It is understood that the aforementioned conductive materials possess excellent conductivity, which is beneficial for constructing a good conductive network. The aforementioned binders facilitate the bonding of the conductive coating to the first sealing element 300 and the bonding within the conductive coating, thereby improving the connection reliability of the conductive coating and the stability of the conductive network.

[0071] In some specific examples, the first seal 300 can be an insulating seal, such as a ceramic seal. It is understood that ceramic seals have excellent corrosion resistance, will not be corroded by electrolytes, and can ensure the battery's lifespan; furthermore, ceramic seals have good impact resistance, thermal shock resistance, high temperature resistance, and are not prone to aging, making the structure of the housing assembly 1000 more stable and providing a better sealing effect. It should be noted that the ceramic seal can be one of an alumina ceramic ring, a zirconia ceramic ring, an aluminum nitride ceramic ring, a boron nitride ceramic ring, a silicon nitride ceramic ring, or a composite ceramic ring of alumina and zirconia. In other embodiments, the first seal 300 can be a plastic or rubber seal.

[0072] In some embodiments, the sealing structure 800 further includes a first connector 500 disposed on the first seal 300. The first connector 500 is used to electrically connect the electrode terminal 200 and the conductive element 400, that is, the electrode terminal 200 is electrically connected to the conductive element 400 through the first connector 500. This arrangement facilitates the electrical connection between the electrode terminal 200 and the conductive element 400. The first connector 500 can be a metal layer, a metal sheet, or a conductive coating, etc. For example, the first seal 300 can be a ceramic seal, and the first connector 500 can be a metal layer disposed on the ceramic seal.

[0073] In some embodiments, the sealing structure 800 further includes a second connector 600 disposed on the first sealing member 300. The second connector 600 is used to electrically connect the housing 100 and the conductive member 400, that is, the housing 100 is electrically connected to the conductive member 400 through the second connector 600. This arrangement facilitates the electrical connection between the housing 100 and the conductive member 400. The second connector 600 can be a metal layer, a metal sheet, or a conductive coating, etc.

[0074] In some embodiments, such as Figures 3 to 5 As shown, the sealing structure 800 further includes: a first connector 500 and a second connector 600. The first connector 500 and the second connector 600 are both disposed on the first sealing member 300. The electrode terminal 200 is electrically connected to the conductive member 400 through the first connector 500, and the housing 100 is electrically connected to the conductive member 400 through the second connector 600.

[0075] In some specific examples, such as Figure 4 and Figure 5 As shown, the first connector 500 includes a first connecting portion 501 and a first extension portion 502 connected together. The first sealing member 300 includes a first end face 303 and a second end face 304 disposed opposite to each other. The first connecting portion 501 is disposed on the first end face 303 and is used for electrical connection with the electrode terminal 200. The first extension portion 502 is disposed on the outer peripheral surface 305 of the first sealing member 300 and is electrically connected with the conductive member 400.

[0076] The first sealing element 300 is annular and sleeved on the electrode terminal 200. The first end face 303 and the second end face 304 can be two end faces that are arranged opposite each other along the axial direction of the first sealing element 300. The outer peripheral surface 305 of the first sealing element 300 is the outer surface connected between the first end face 303 and the second end face 304.

[0077] Understandably, providing the first connecting portion 501 facilitates the connection between the electrode terminal 200 and the first sealing member 300. Providing the first extension portion 502 makes the conductive network between the first connecting portion 501 and the conductive member 400 more stable and reliable.

[0078] In this application, such as Figures 3 to 5 As shown, the first connecting part 501 can be provided on the side of the first sealing member 300 away from the housing 100 and is used for electrical connection with the electrode terminal 200, and the first extension part 502 is provided on the outer peripheral side of the first sealing member 300 and is electrically connected with the conductive member 400.

[0079] In some specific examples, the first connecting portion 501 and the first extension portion 502 may be metal layers disposed on the first sealing member 300, and the conductive member 400 may be a conductive coating applied to the first extension portion 502. Of course, in other embodiments, the first connecting portion 501 and the first extension portion 502 may also be metal sheets, and the conductive member 400 may be a conductive coating applied to the first extension portion 502; or, the conductive member 400 may be a conductive coating applied to the outer peripheral surface of the first sealing member 300, with the first extension portion 502 overlapping the conductive coating.

[0080] In some specific examples, such as Figure 6 As shown, the width of the first extension 502 is 'a', and the height of the first seal 300 is 'H', where 'a' and 'H' satisfy: 0.1H ≤ a ≤ 0.45H, and both 'a' and 'H' are in mm. The width of the first extension 502 can be understood as the distance between the first end face 303 of the first seal 300 and the end face of the first extension 502 near the second end face 304, or as the distance between the end face of the first seal 300 away from the housing 100 and the end face of the first extension 502 facing the housing 100, or as the distance between the end face of the first seal 300 away from the aforementioned electrode core and the end face of the first extension 502 facing the aforementioned electrode core. Furthermore, the height of the first seal 300 can be understood as the distance between the two opposite end faces of the first seal 300 along the axis of the electrode terminal 200.

[0081] Understandably, 0.1H ≤ a can improve the reliability of the connection between the first connecting part 501 and the first extension part 502, as well as the reliability of the connection between the first extension part 502 and the conductive element 400, thereby forming a stable conductive network between the first connecting part 500 and the conductive element 400, ensuring that the housing 100 has a certain potential. a ≤ 0.45H can prevent the width of the first extension part 502 from being too long and making contact with other conductive structures (such as the second extension part 602 in the following text), which would cause the potential of the housing 100 to be too large, resulting in an increase in the circuit current when the battery is short-circuited, which could easily cause safety hazards such as arcing and fire.

[0082] In some specific examples, such as Figure 4 and Figure 5As shown, both the first sealing element 300 and the first connecting portion 501 include two arc segments and two straight segments, with each straight segment connecting the two arc segments. At least one of the two straight segments of the first connecting portion 501 is connected to a first extension portion 502, and a corresponding conductive element 400 is provided on the first extension portion 502. The first extension portion 502 located on one side of the longitudinal section of the first sealing element 300 is electrically connected to the conductive element 400.

[0083] The connection of at least one of the two straight segments of the first connecting portion 501 to the first extension portion 502 can be understood as either one of the two straight segments of the first connecting portion 501 being connected to the first extension portion 502, or both straight segments being connected to the first extension portion 502. The first extension portion 502 having a corresponding conductive element 400 can be understood as one conductive element 400 when there is one first extension portion 502, and two conductive elements 400 when there are two first extension portions 502. The longitudinal section of the first sealing element 300 can be understood as the plane containing the center lines of the two arc segments of the first sealing element 300.

[0084] Understandably, the straight segment 302 of the first seal is connected to the arc segment 301 of the first seal, and correspondingly, the straight segment 504 of the first connecting part is connected to the arc segment 503 of the first connecting part. By setting the first extension 502 on the straight segment 504 of the first connecting part, it is beneficial to improve the connection reliability between the first extension 502 and the first connecting part 501.

[0085] Understandably, the length of the first extension 502 is b, and the length of the straight segment 504 of the first connecting part is L, where b and L satisfy: b ≤ L, and the units of b and L are both mm. The length directions of the first extension 502 and the straight segment 504 of the first connecting part are perpendicular to the center lines of the two arc segments of the first connecting part.

[0086] Furthermore, the length of the first extension 502 and the length of the conductive member 400 are not specifically limited. Preferably, the length of the first extension 502 can be the same as the length of the conductive member 400. The length direction of the conductive member 400 is the same as the length direction of the first extension 502.

[0087] In some embodiments, such as Figures 3 to 5 As shown, the second connector 600 includes a second connecting portion 601 and a second extension portion 602 connected together, and the first sealing member 300 includes a first end face 303 and a second end face 304 disposed opposite to each other. The second connecting portion 601 is disposed on the second end face 304 and is used for electrical connection with the housing 100, and the second extension portion 602 is disposed on the outer peripheral surface 305 of the first sealing member 300 and is electrically connected to the conductive member 400.

[0088] The first sealing element 300 is annular and sleeved on the electrode terminal 200. The first end face 303 and the second end face 304 can be two end faces that are arranged opposite each other along the axial direction of the first sealing element 300. The outer peripheral surface 305 of the first sealing element 300 is the outer surface connected between the first end face 303 and the second end face 304.

[0089] Understandably, providing the second connecting portion 601 facilitates the connection between the housing 100 and the first sealing member 300. Providing the second extension portion 602 makes the conductive network between the second connecting portion 601 and the conductive member 400 more stable and reliable.

[0090] In this application, such as Figures 3 to 5 As shown, the second connecting part 601 is provided on the side of the first sealing member 300 facing the housing 100 and is electrically connected to the housing 100, and the second extension part 602 is provided on the outer peripheral side of the first sealing member 300 and is electrically connected to the conductive member 400.

[0091] In some specific examples, the second connecting portion 601 and the second extension portion 602 may be a metal layer disposed on the first sealing member 300, and the conductive member 400 may be a conductive coating coated on the second extension portion 602. Of course, in other embodiments, the second connecting portion 601 and the second extension portion 602 may also be metal sheets, and the conductive member 400 may be a conductive coating coated on the second extension portion 602; or, the conductive member 400 may be a conductive coating coated on the outer peripheral surface of the first sealing member 300, with the second extension portion 602 overlapping the conductive coating.

[0092] In some specific examples, such as Figure 6 As shown, the width of the second extension 602 is c, and the height of the first sealing member 300 is H. c and H satisfy: 0.1H ≤ c ≤ 0.45H, where both c and H are in mm. The width of the second extension 602 can be understood as the distance between the second end face 304 of the first sealing member 300 and the end face of the second extension 602 near the first end face 303; or it can be understood as the distance between the end face of the first sealing member 300 facing the housing 100 and the end face of the second extension 602 away from the housing 100; or it can be understood as the distance between the end face of the first sealing member 300 facing the aforementioned electrode core and the end face of the first extension 602 away from the aforementioned electrode core. Furthermore, the height of the first sealing member 300 can be understood as the distance between the two opposite end faces of the first sealing member 300 along the axis of the electrode terminal 200.

[0093] Understandably, 0.1H ≤ c can improve the reliability of the connection between the second connecting part 601 and the second extension part 602, as well as the reliability of the connection between the second extension part 602 and the conductive member 400, thereby forming a stable conductive network between the second connecting part 600 and the conductive member 400, ensuring that the housing 100 has a certain potential. c ≤ 0.45H can prevent the second extension part 602 from being too long and making contact with other conductive structures (such as the first extension part 502 mentioned above), which would cause the potential of the housing 100 to be too large, resulting in an increase in the circuit current when the battery is short-circuited, which could easily cause safety hazards such as arcing and fire.

[0094] In some specific examples, such as Figure 4 and Figure 5 As shown, both the first sealing element 300 and the second connecting portion 601 include two arc segments and two straight segments, with each straight segment connecting the two arc segments. At least one of the two straight segments of the second connecting portion 601 is connected to a second extension portion 602, and a corresponding conductive element 400 is provided on the second extension portion 602. The second extension portion 602 located on one side of the longitudinal section of the first sealing element 300 is electrically connected to the conductive element 400.

[0095] The connection of at least one of the two straight segments of the second connecting portion 601 to the second extension portion 602 can be understood as either one of the two straight segments of the second connecting portion 601 being connected to the second extension portion 602, or both straight segments being connected to the second extension portion 602. The provision of a corresponding conductive element 400 on the second extension portion 602 can be understood as one conductive element 400 when there is one second extension portion 602, and two conductive elements 400 when there are two second extension portions 602. The longitudinal section of the first sealing element 300 can be understood as the plane containing the center lines of the two arc segments of the first sealing element 300.

[0096] Understandably, the straight segment 302 of the first seal is connected to the arc segment 301 of the first seal.

[0097] Correspondingly, the straight segment 604 of the second connecting part is connected to the arc segment 603 of the second connecting part. By setting the second extension 602 on the straight segment 604 of the first connecting part, it is beneficial to improve the connection reliability between the second extension 602 and the second connecting part 601.

[0098] Understandably, the length of the second extension 602 is d, and the length of the straight segment 604 of the second connecting part is L. d and L satisfy: d ≤ L, and the units of d and L are both mm. The length directions of the second extension 602 and the straight segment 604 of the second connecting part are perpendicular to the center lines of the two arc segments of the second connecting part.

[0099] Furthermore, the length of the second extension 602 is not specifically limited to the length of the conductive member 400. Preferably, the length of the second extension 602 can be the same as the length of the conductive member 400. The length direction of the conductive member 400 is the same as the length direction of the second extension 602.

[0100] In some specific examples, such as Figures 3 to 5 As shown, the sealing structure 800 further includes a first connector 500, through which the first sealing element 300 is sealed to the electrode terminal 200. This arrangement facilitates the connection between the first sealing element 300 and the electrode terminal 200. For example, the first sealing element 300 is a ceramic seal, and the first connector 500 includes a metal layer disposed on the ceramic seal, with the electrode terminal 200 welded to this metal layer. Alternatively, the first connector 500 is a conductive adhesive, through which the first sealing element 300 is bonded to the electrode terminal 200.

[0101] In some specific examples, such as Figure 3 As shown, the sealing structure 800 also includes a second sealing element 700, through which the first sealing element 300 is sealed to the housing 100. This arrangement facilitates the connection between the first sealing element 300 and the housing 100. For example, the second sealing element 700 may be a metal component, the first sealing element 300 a ceramic sealing element, with a metal layer disposed on the ceramic sealing element, the second sealing element 700 welded to the metal layer, and the second sealing element 700 welded to the housing 100.

[0102] In some specific examples, such as Figure 3 As shown, the sealing structure 800 also includes a second sealing element 700, and the conductive element 400 is electrically connected to the housing 100 through the second sealing element 700. With this configuration, the second sealing element 700 can serve both a sealing and conductive function, which helps to reduce the number of components.

[0103] In some specific examples, such as Figures 3 to 5 As shown, the conductive component 400 is electrically connected to the electrode terminal 200 via the first connector 500. This configuration allows the first connector 500 to serve both a sealing and conductive function, which helps reduce the number of components.

[0104] Preferably, such as Figures 3 to 5As shown, the first connector 500 includes a first connecting portion 501 and a first extension portion 502 connected together. The first sealing member 300 includes a first end face 303 and a second end face 304 disposed opposite to each other. The first connecting portion 501 is disposed on the first end face 303, and the first sealing member 300 is sealed to the electrode terminal 200 through the first connecting portion 501, and the first connecting portion 501 is used for electrical connection with the electrode terminal 200. The first extension portion 502 is disposed on the outer peripheral surface 305 of the first sealing member 300, and the first extension portion 502 is electrically connected to the conductive member 400. This facilitates the sealed connection between the first sealing member 300 and the electrode terminal 200, as well as the electrical connection between the electrode terminal 200 and the conductive member 400.

[0105] In some specific examples, such as Figure 3 and Figure 5 As shown, the sealing structure 800 further includes a second connector 600, through which the first sealing element 300 is sealed to the second sealing element 700. This arrangement facilitates the connection between the first sealing element 300 and the second sealing element 700. For example, the first sealing element 300 is a ceramic sealing element, the second connector 600 includes a metal layer disposed on the ceramic sealing element, and the second sealing element 700 is welded to the metal layer. Alternatively, the second connector 600 is a conductive adhesive, through which the second sealing element 700 is bonded to the first sealing element 300.

[0106] In some specific examples, such as Figure 3 and Figure 5 As shown, the sealing structure 800 further includes a second connector 600, which is disposed on the first sealing member 300. The conductive member 400 is electrically connected to the second sealing member 700 through the second connector 600. With this configuration, the second connector 600 can serve both a sealing and conductive function, which helps to reduce the number of components.

[0107] In some specific examples, such as Figure 3 and Figure 5 As shown, the second connector 600 includes a connected second connecting portion 601 and a second extension portion 602. The first sealing member 300 includes a first end face 303 and a second end face 304 disposed opposite to each other. The second connecting portion 601 is disposed on the second end face 304. The first sealing member 300 is sealed and connected to the second sealing member 700 through the second connecting portion 601, and the second connecting portion 601 is electrically connected to the second sealing member 700. The second extension portion 602 is disposed on the outer peripheral surface 305 of the first sealing member 300 and is electrically connected to the conductive member 400. This facilitates the sealing connection between the first sealing member 300 and the second sealing member 700, as well as the electrical connection between the second sealing member 700 and the conductive member 400.

[0108] In some specific examples, such as Figure 3As shown, the second sealing member 700 includes a body portion 701, a transition portion 702, and a flange portion 703. The body portion 701 and the flange portion 703 are spaced apart along the axial direction of the electrode terminal 200. The transition portion 702 is connected between the body portion 701 and the flange portion 703. The body portion 701 is provided with a second through hole 704, and the electrode terminal 200 is disposed in the second through hole 704. The body portion 701 is sealed to the housing 100, and the flange portion 703 is sealed to the first sealing member 300 through a second connector 600.

[0109] For example, the second connector 600 includes a metal layer disposed on the first seal 300, the flange portion 703 can be welded to the metal layer, and the body portion 701 is welded to the housing 100. This arrangement is beneficial to achieve a sealing connection between the second seal 700 and the first seal 300 and the housing 100.

[0110] In some specific examples, such as Figure 3 As shown, the electrode terminal 200 includes a column 201 and a connecting ring 202 disposed on the outer periphery of the column 201. The column 201 is disposed in a first through hole 101. A first sealing member 300 is sleeved on the column 201, and at least a portion of the first sealing member 300 is located on the side of the connecting ring 202 facing the housing 100. The first sealing member 300 is sealed to the connecting ring 202 through a first connecting member 500. It is understood that providing the connecting ring 202 facilitates the connection between the electrode terminal 200 and the first sealing member 300. For example, when the first sealing member 300 is a ceramic sealing member, a metal layer is provided on the side of the ceramic sealing member facing the connecting ring 202. This metal layer can be an aluminum layer, a copper layer, or a molybdenum-manganese layer, etc. The connecting ring 202 is welded to this metal layer, and the connecting ring 202 can buffer the structural stress of the connection between the electrode terminal 200 and the ceramic sealing member. In addition, after the metal layer is provided, the ceramic sealing member can also be plated with elements such as nickel or aluminum that do not affect welding, so as to enhance the mechanical strength of the welded part and the substrate to be welded.

[0111] In some specific examples, such as Figure 3 As shown, at least a portion of the first seal 300 is located on the outside of the housing 100, and at least a portion of the second seal 700 is located between the first seal 300 and the housing 100. By placing at least a portion of the first seal 300 on the outside of the housing 100, its occupation of the internal space of the housing 100 can be reduced, which is beneficial to improving the utilization of the internal space of the housing 100 and thus increasing the energy density of the battery. The fact that at least a portion of the second seal 700 is located between the first seal 300 and the housing 100 helps to improve the compactness of the structural design of the housing assembly 1000. It is understood that the outside of the housing 100 refers to the side of the housing 100 that is away from the aforementioned receiving cavity.

[0112] In some specific examples, such as Figure 3As shown, a groove 102 is provided on the outer surface of the housing 100, and at least a portion of the second seal 700 is located in the groove 102. This arrangement reduces the space occupied by the second seal 700 on the outer surface of the housing 100, which helps to improve the compactness of the structural design of the housing assembly 1000.

[0113] The following describes a single-cell battery according to an embodiment of the present invention.

[0114] The single-cell battery according to an embodiment of the present invention includes the aforementioned housing assembly 1000. The specific structure of the housing assembly 1000 will not be described in detail here.

[0115] According to the embodiments of the present invention, by adopting the aforementioned housing assembly 1000, the service life and safety performance of the single battery can be improved.

[0116] The following describes the battery module according to an embodiment of the present invention.

[0117] The battery module according to an embodiment of the present invention includes the aforementioned housing assembly 1000. The specific structure of the housing assembly 1000 will not be described in detail here.

[0118] According to the embodiments of the present invention, by adopting the aforementioned housing assembly 1000, the service life and safety performance of the battery module can be improved.

[0119] The following describes the battery pack according to an embodiment of the present invention.

[0120] The battery pack according to an embodiment of the present invention includes the aforementioned housing assembly 1000. The specific structure of the housing assembly 1000 will not be described in detail here.

[0121] According to the embodiments of the present invention, by employing the aforementioned housing assembly 1000, the battery pack's service life and safety performance can be improved.

[0122] The following describes the electrical equipment according to an embodiment of the present invention.

[0123] The electrical equipment according to the embodiments of this utility model includes the aforementioned single battery, battery module, or battery pack.

[0124] According to the embodiments of the present invention, by adopting the aforementioned single battery, battery module, or battery pack, the service life and safety performance of the electrical equipment can be improved.

[0125] It should be noted that the electrical equipment mentioned here can be energy storage systems, 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; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0126] In some embodiments, the electrical equipment is a vehicle, which may be a pure electric vehicle or a hybrid vehicle.

[0127] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0128] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sealing structure for a battery housing assembly, characterized in that, The sealing structure includes: The first seal is used to seal the housing and electrode terminals of the connecting housing assembly; A conductive element is disposed on the first sealing element, and the conductive element is used to electrically connect the housing and the electrode terminals.

2. The sealing structure according to claim 1, characterized in that, The resistance of the conductive element is 5 kΩ to 100 kΩ; and / or, the conductive element is disposed on the outer periphery of the first sealing element; and / or, the conductive element is a conductive coating; and / or, the first sealing element is a ceramic sealing element.

3. The sealing structure according to claim 1 or 2, characterized in that, The sealing structure further includes: a first connector disposed on the first sealing member, the first connector being used for electrically connecting the electrode terminal and the conductive member; and / or... The sealing structure further includes a second connector, which is disposed on the first sealing element and is used to electrically connect the housing and the conductive element.

4. The sealing structure according to claim 3, characterized in that, The first connector includes a first connecting portion and a first extension portion connected together. The first sealing member includes a first end face and a second end face disposed opposite to each other. The first connecting portion is disposed on the first end face and is used for electrical connection with the electrode terminal. The first extension portion is disposed on the outer peripheral surface of the first sealing member and is electrically connected with the conductive member.

5. The sealing structure according to claim 4, characterized in that, The first connecting portion and the first extension portion are metal layers disposed on the first sealing member, and the conductive member is a conductive coating applied to the first extension portion; and / or, The width of the first extension is 'a', and the height of the first seal is 'H', where 'a' and 'H' satisfy: 0.1H ≤ a ≤ 0.45H, and the units of 'a' and 'H' are both mm; and / or, Both the first sealing element and the first connecting portion include two arc segments and two straight segments, with each straight segment connecting the two arc segments; at least one of the two straight segments of the first connecting portion is connected to the first extension portion, and the first extension portion is provided with a corresponding conductive element, with the first extension portion located on one side of the longitudinal section of the first sealing element and the conductive element being electrically connected.

6. The sealing structure according to claim 3, characterized in that, The second connector includes a second connecting portion and a second extension portion connected together. The first seal includes a first end face and a second end face disposed opposite to each other. The second connecting portion is disposed on the second end face and is used for electrical connection with the housing. The second extension portion is disposed on the outer peripheral surface of the first seal and is electrically connected with the conductive element.

7. The sealing structure according to claim 6, characterized in that, The second connecting portion and the second extension portion are metal layers disposed on the first sealing member, and the conductive element is a conductive coating applied to the second extension portion; and / or, The width of the second extension is c, and the height of the first seal is H, where c and H satisfy: 0.1H ≤ c ≤ 0.45H, and the units of c and H are both mm; and / or, Both the first sealing element and the second connecting portion include two arc segments and two straight segments, with each straight segment connecting between the two arc segments; at least one of the two straight segments of the second connecting portion is connected to the second extension portion, and the second extension portion is provided with a corresponding conductive element, with the second extension portion located on one side of the longitudinal section of the first sealing element and the conductive element being electrically connected.

8. The sealing structure according to claim 1 or 2, characterized in that, The sealing structure further includes: a first connector, wherein the first sealing member is sealed to the electrode terminal via the first connector; and / or The sealing structure further includes a second sealing element, wherein the first sealing element is sealed to the housing via the second sealing element; and / or The sealing structure further includes a second sealing element, through which the conductive element is electrically connected to the housing.

9. The sealing structure according to claim 8, characterized in that, The conductive element is electrically connected to the electrode terminal through the first connector; preferably, the first connector includes a first connecting portion and a first extension portion connected together, the first sealing element includes a first end face and a second end face disposed opposite to each other, the first connecting portion is disposed on the first end face, the first sealing element is sealed to the electrode terminal through the first connecting portion, and the first connecting portion is used to electrically connect to the electrode terminal, the first extension portion is disposed on the outer peripheral surface of the first sealing element, and the first extension portion is electrically connected to the conductive element.

10. The sealing structure according to claim 8, characterized in that, The sealing structure further includes: a second connector, wherein the first sealing element is sealed to the second sealing element via the second connector; and / or The sealing structure further includes a second connector, which is disposed on the first sealing element, and the conductive element is electrically connected to the second sealing element through the second connector.

11. The sealing structure according to claim 10, characterized in that, The second connector includes a second connecting portion and a second extension portion connected together. The first sealing member includes a first end face and a second end face disposed opposite to each other. The second connecting portion is disposed on the second end face. The first sealing member is sealed to the second sealing member through the second connecting portion, and the second connecting portion is electrically connected to the second sealing member. The second extension portion is disposed on the outer peripheral surface of the first sealing member and is electrically connected to the conductive member; and / or, The second sealing element includes a body portion, a transition portion, and a flange portion. The body portion and the flange portion are spaced apart along the axial direction of the electrode terminal. The transition portion is connected between the body portion and the flange portion. The body portion is provided with a second through hole, and the electrode terminal is disposed in the second through hole. The body portion is used for sealing connection with the housing. The flange portion is sealed connection with the first sealing element through the second connecting member.

12. A housing assembly, characterized in that, The device includes a housing, electrode terminals, and a sealing structure as described in any one of claims 1-11. The housing has a first through hole, the electrode terminals are disposed in the first through hole, and the sealing structure seals the housing and the electrode terminals to seal the first through hole.

13. A battery, characterized in that, Includes the housing assembly of claim 12, wherein the battery is any one of a single cell, a battery module, and a battery pack.

14. An electrical appliance, characterized in that, Includes the battery as described in claim 13.

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