Battery end cover structure, battery and electric equipment

Abstract

The utility model provides a battery end cover structure, a battery and electric equipment, the battery end cover structure comprises: an end cover body provided with a pole mounting hole; at least part of the pole component is arranged in the pole mounting hole in a penetrating manner; the connecting piece is connected with the end cover body and the pole assembly; when the battery is in a normal working state, the connecting piece is connected with the end cover body and the pole assembly in an insulating manner; and when the battery is in a reverse high-voltage loading state, the connecting piece is conductively communicated with the end cover body and the pole assembly. Therefore, the connecting piece presents different characteristics in different states, so that the connecting piece presents a conductive characteristic in a reverse high-voltage loading state of the battery, the end cover body is conductively communicated with the pole assembly, and reverse high voltage is transmitted to the end cover body through the connecting piece by the pole assembly; therefore, the insulation between the electrode assembly and the battery shell is prevented from being broken down after high voltage is borne in the battery, and safety accidents such as battery fire and the like are further avoided.

Description

A battery end cap structure, a battery, and an electrical device. Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery end cap structure, a battery including the above-mentioned battery end cap structure, and an electrical device including the above-mentioned battery. Background Technology

[0002] Current battery designs, in the event of a circuit break in the entire battery pack, may cause a single battery to be subjected to a momentary reverse high voltage due to individual differences within the pack. When a single battery experiences a high reverse voltage load, the weakest point in the insulation between the battery casing and the electrode assembly may experience high-voltage breakdown. Since the electrolyte inside the battery is flammable, the arc generated after the reverse high voltage breaks down the electrode assembly can ignite the electrolyte, causing the battery to catch fire. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a battery end cap structure, a battery and an electrical device, which solves the problem of safety accidents caused by reverse high voltage inside the battery.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A battery end cap structure, comprising:

[0006] The end cap body has a first surface and a second surface along its thickness direction, and the end cap body has a pole mounting hole that penetrates the first surface and the second surface;

[0007] The electrode assembly is at least partially inserted into the electrode mounting hole;

[0008] Connector, connecting the end cap body and the pole post assembly; wherein:

[0009] When the battery is in normal operating condition, the connector provides an insulated connection between the end cap body and the terminal assembly.

[0010] When the battery is under reverse high voltage loading, the connector electrically connects the end cap body and the electrode assembly.

[0011] Optionally, in the above battery end cap structure, the electrode assembly includes an electrode body, the electrode body passing through the electrode mounting hole, and having a gap between the electrode body and the electrode mounting hole;

[0012] The connector is located on the first surface of the end cap body to connect the end cap body and the pole body; the connector fills the gap or covers the first opening in the gap on the first surface to seal the gap.

[0013] Optionally, in the above-described battery end cap structure, the electrode body has a first receiving groove formed along its circumference.

[0014] The connector is an annular component, and the inner ring portion of the connector is sealed to the first receiving groove.

[0015] Optionally, in the above-mentioned battery end cap structure, a second receiving groove is formed on the first surface of the end cap body;

[0016] The outer ring of the connector is sealed to the second receiving groove.

[0017] Optionally, in the above-mentioned battery end cap structure,

[0018] Along the thickness direction of the end cap body, the connector does not protrude from the opening of the first receiving groove;

[0019] And / or,

[0020] Along the thickness direction of the end cap body, the connector does not protrude from the opening of the second receiving groove;

[0021] And / or,

[0022] Along the thickness direction of the end cap body, the heights of the first receiving groove and the second receiving groove are the same.

[0023] Optionally, in the above-described battery end cap structure, the connection between the connector and the electrode body has a first weld mark, and the connection between the connector and the end cap body has a second weld mark.

[0024] Optionally, in the above-mentioned battery end cap structure,

[0025] The pole assembly includes a pole body and a first pole plate, the radial dimension of the pole body is smaller than the radial dimension of the first pole plate, the pole body is at least partially inserted through the pole mounting hole; the first pole plate is located on the side of the end cap body near the second surface; the connector is at least partially located between the pole body and the end cap body, and the connector extends to the first surface of the end cap body.

[0026] or,

[0027] The electrode assembly includes an electrode body, a first electrode plate, and a second electrode plate. The electrode body is at least partially inserted through the electrode mounting hole. The first electrode plate is located on the side of the end cap body closer to the second surface, and the second electrode plate is located on the side of the end cap body closer to the first surface. Along the thickness direction of the end cap body, the projection of the second electrode plate covers the projection of the electrode mounting hole. The connector is at least partially located between the second electrode plate and the first surface of the end cap body.

[0028] or,

[0029] The electrode assembly includes an electrode body, a first electrode plate, a second electrode plate, and a first insulating member. The electrode body is at least partially inserted through the electrode mounting hole. The first electrode plate is located on the side of the end cap body near the second surface, and the second electrode plate is located on the side of the end cap body near the first surface. Along the thickness direction of the end cap body, the projection of the second electrode plate covers the projection of the electrode mounting hole. The first insulating member is at least partially located between the second electrode plate and the first surface of the end cap body. The first insulating member is provided with a first through hole, and the connector is at least partially located in the first through hole and is connected to the second electrode plate and the end cap body, respectively.

[0030] Optionally, in the above battery end cap structure, the connector is a semiconductor connector, which is any one of silicon carbide connector, gallium nitride connector, gallium arsenide connector, and indium phosphide connector.

[0031] A battery includes a battery casing and an electrode assembly disposed inside the battery casing; the battery casing includes a housing having an opening at at least one end, and a battery end cap structure as described above that covers the opening; a first surface of the end cap body of the battery end cap structure is the outer surface of the battery casing; the electrode assembly is electrically connected to the terminal post assembly of the battery end cap structure.

[0032] An electrical device comprising a battery as described above.

[0033] The battery end cap structure, battery, and electrical device of this application are provided with a connector connecting the end cap body and the terminal assembly. When the battery end cap structure is used for the battery, under normal battery operation, the connector exhibits insulating properties, keeping the end cap body and the terminal assembly in an open circuit state, so that the terminal assembly can output voltage normally to the external circuit. When the battery is momentarily disconnected and reverse high voltage is applied, i.e., under reverse high voltage application, the connector changes to exhibit conductive properties, making the end cap body and the terminal assembly electrically connected. The reverse high voltage is then transmitted to the end cap body through the terminal assembly and the connector, and released to the outside of the battery through the battery casing including the end cap body. This prevents the insulation between the electrode assembly and the battery casing from being broken down after the battery is subjected to high voltage, thereby preventing safety accidents such as battery fire. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 is a schematic diagram of the battery end cap structure according to an embodiment of this application;

[0036] Figure 2 is a cross-sectional view of the pole assembly in Figure 1;

[0037] Figure 3 is a schematic diagram of the structure in Figure 2 without connecting parts;

[0038] Figure 4 is a structural schematic diagram of the battery end cap structure according to another embodiment of this application;

[0039] Figure 5 is a cross-sectional view of the pole assembly in Figure 4;

[0040] Figure 6 is an exploded view of the connector and the pole body in Figure 4;

[0041] Figure 7 is a schematic diagram of the structure of a battery having a battery end cap according to another embodiment of this application;

[0042] Figure 8 is a schematic diagram of the structure of a battery having a battery end cap according to another embodiment of this application;

[0043] Figure 9 is a cross-sectional view of the battery end cap structure in Figure 8.

[0044] In Figure 1-9 above:

[0045] 1. End cap body; 2. Pole post assembly; 3. Connector;

[0046] 11. Pole post mounting hole; 12. Second receiving groove;

[0047] 21. Pole post body; 22. First pole post plate; 23. Second pole post plate; 24. First insulating component; 23. Pole post plate; 25. Sealing ring;

[0048] 31. Connecting part;

[0049] 211. First receiving slot; 212. Snap-fit ​​slot. Detailed Implementation

[0050] This application provides a battery end cap structure, a battery, and an electrical device. The battery end cap structure is provided with a connector connecting the end cap body and the terminal assembly. When the battery is in normal operating condition, the connector exhibits insulating properties, keeping the end cap body and the terminal assembly in an open circuit state, so that the terminal assembly can output voltage to the external circuit normally. When the battery is under reverse high voltage loading, the connector changes to exhibit conductive properties, making the end cap body and the terminal assembly electrically connected, so that the reverse high voltage is released to the outside of the battery through the end cap body, preventing the insulation between the electrode assembly and the battery casing from being broken down after the battery is subjected to high voltage, thereby preventing safety accidents such as battery fire.

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and 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.

[0052] As shown in Figures 1-9, this application provides a battery end cap structure, which includes an end cap body 1, a terminal post assembly 2, and a connector 3. The end cap body 1 has a first surface and a second surface along its thickness direction; the end cap body 1 has a terminal post mounting hole 11 penetrating the first surface and the second surface. The terminal post assembly 2 is at least partially inserted into the terminal post mounting hole 11. The connector 3 connects the end cap body 1 and the terminal post assembly 2. When the battery is in normal operating condition, the connector 3 provides an insulating connection between the end cap body 1 and the terminal post assembly 2; when the battery is under reverse high-voltage loading, the connector 3 provides a conductive connection between the end cap body 1 and the terminal post assembly 2.

[0053] It should be noted that, referring to Figure 2, the thickness direction of the end cap body 1 is the thickness direction of the battery end cap structure, which is simply referred to as the thickness direction, and is the direction indicated by the arrow in Figure 2. The battery includes a battery casing and an electrode assembly disposed inside the battery casing; the electrode assembly is a stacked core or a wound core, and includes a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive and negative electrode sheets. The battery end cap structure is a component of the battery casing; the battery casing includes a housing and the battery end cap structure, at least one end of the housing has an opening, and the battery end cap structure seals the opening of the housing; the first surface of the end cap body 1 is the outer surface of the battery casing, and the second surface of the end cap body 1 is the inner surface of the battery casing. Optionally, the top of the housing has a top opening, and the battery end cap structure is disposed at the top opening.

[0054] "Battery's normal operating state" refers to the battery operating normally and outputting voltage to the external circuit normally. "Battery's reverse high voltage loading state" refers to the battery being subjected to a high voltage opposite to that in its normal operating state. This can occur in scenarios such as when a battery pack consisting of multiple batteries experiences a momentary circuit failure. Due to differences between the batteries in the pack, one battery may be subjected to a momentary reverse high voltage, at which point that battery is in the reverse high voltage loading state.

[0055] The connector 3 physically connects the end cap body 1 and the terminal assembly 2 together. When the battery is in normal working condition, the connector 3 exhibits insulating properties, keeping the end cap body 1 and the terminal assembly 2 in an open circuit state, so that the terminal assembly 2 can output voltage to the external circuit normally. When the battery is momentarily disconnected and reverse high voltage is applied, that is, when the battery is in a reverse high voltage application state, the connector 3 changes to exhibiting conductive properties, making the end cap body 1 and the terminal assembly 2 electrically connected. The reverse high voltage is transmitted to the end cap body 1 through the terminal assembly 2 and the connector 3, so as to be released to the outside of the battery through the battery casing including the end cap body 1. This prevents the insulation between the electrode assembly and the battery casing from being broken down after the battery is subjected to high voltage, thereby preventing safety accidents such as battery fire.

[0056] Please refer to Figure 2. In some embodiments of this application, the pole assembly 2 includes a pole body 21, which passes through the pole mounting hole 11 and has a gap between the pole body 21 and the pole mounting hole 11; the connector 3 is located on the first surface of the end cap body 1, and the connector 3 connects the end cap body 1 and the pole body 21 and seals the gap.

[0057] It should be noted that "the gap between the electrode post body 21 and the electrode post mounting hole 11" means that the electrode post body 21 includes a first segment a located within the electrode post mounting hole 11, the diameter of the first segment a is smaller than the diameter of the electrode post mounting hole 11, and there is a gap between the outer circumferential surface of the first segment a and the inner circumferential surface of the electrode post mounting hole 11. The gap includes a first connecting port on the first surface of the end cap body 1 and a second connecting port on the second surface of the end cap body 1. "The connector 3 seals the gap" means that when the battery end cap structure is used for the battery, the external space of the battery casing can no longer connect to the internal space of the battery casing through the first connecting port and the gap and the second connecting port. "The connector 3 is disposed on the first surface of the end cap body 1" means that the connector 3 fills the gap and is located on the side where the first surface of the end cap body 1 is located to seal the gap; or, the connector 3 covers the first connecting port on the first surface to seal the gap.

[0058] As described above, the connector 3 is positioned on the first surface of the end cap body 1, i.e., on the outer surface of the battery casing. The connector 3 provides ample space for installation and is easy to manufacture. Furthermore, while achieving a physical connection between the terminal body 21 and the end cap body 1, the connector 3 also seals the gap between the terminal body 21 and the terminal mounting hole 11. This eliminates the need for a sealing ring at the aforementioned gap and / or for applying plastic at the first connection point on the first surface, saving on the material costs of sealing rings and plastic (PPS plastic), as well as the processing costs.

[0059] Please refer to Figure 3. In some embodiments of this application, the pole body 21 has a first receiving groove 211 formed along its circumference. Please refer to Figure 2. The connector 3 is an annular member, and the inner ring portion of the connector 3 is sealed to the first receiving groove 211.

[0060] It should be noted that the first receiving groove 211 includes a first annular bottom wall and a first annular side wall located on the outer periphery of the first annular bottom wall. The side of the first receiving groove 211 opposite to the first annular bottom wall is a first top opening, and the side of the first receiving groove 211 opposite to the first annular side wall is a first side opening communicating with the gap.

[0061] The first receiving groove 211 provides a limiting space for the connection of the connector 3 to the pole body 21, ensuring the precise positioning and connection of the connector 3 on the pole body 21. Furthermore, the first annular bottom wall of the first receiving groove 211 provides sufficient contact area with the inner ring portion of the connector 3, ensuring a secure and stable connection of the inner ring portion of the connector 3 to the first receiving groove 211.

[0062] Referring to Figure 3, in some embodiments of this application, a second receiving groove 12 is formed on the first surface of the end cap body 1. Referring to Figure 2, the outer ring portion of the connector 3 is sealed to the second receiving groove 12.

[0063] It should be noted that the second receiving groove 12 includes a second annular bottom wall and a second annular side wall located on the outer periphery of the second annular bottom wall. The side of the second receiving groove 12 opposite to the second annular bottom wall is a second top opening, and the side of the second receiving groove 12 opposite to the second annular side wall is a second side opening communicating with the gap.

[0064] The second receiving groove 12 provides a limiting space for the connection of the connector 3 to the end cap body 1, ensuring the precise positioning and connection of the connector 3 on the end cap body 1. Furthermore, the second annular bottom wall of the second receiving groove 12 provides sufficient contact area with the outer ring portion of the connector 3, ensuring a secure and stable connection of the outer ring portion of the connector 3 to the second receiving groove 12.

[0065] Please refer to Figures 2-3. In some embodiments of this application, the connector 3 does not protrude from the opening of the first receiving groove 211 along the thickness direction of the end cap body 1.

[0066] It should be noted that, referring to Figure 2, along the thickness direction of the end cap body 1, the pole body 21 includes a first segment a and a second segment b connected together. The diameter of the hole in the first segment a is larger than the diameter of the hole in the second segment b. A stepped surface c is formed at the junction of the first segment a and the second segment b. The stepped surface c can be flush with the first connecting opening of the gap, can be lower than the first connecting opening and located within the gap, or can be higher than the first connecting opening and extend out of the first surface. Preferably, the stepped surface c is flush with the first connecting opening. A first receiving groove 211 is formed on the outer circumference of the end of the first segment a near the end of the second segment b. The opening of the first receiving groove 211 is the first top opening mentioned above, and it is flush with the stepped surface c.

[0067] As described above, this ensures that the connector 3 does not occupy additional space in the battery relative to the terminal body 21, effectively guaranteeing the battery's energy density. Furthermore, the connector 3 does not protrude from the opening of the first receiving groove 211, which can provide a certain degree of safety protection for the connector 3 and extend its service life.

[0068] Please refer to Figures 2-3. In some embodiments, the connector 3 does not protrude from the opening of the second receiving groove 12 along the thickness direction of the end cap body 1.

[0069] It should be noted that the opening of the second receiving groove 12 is flush with the first connecting port of the gap.

[0070] As described above, this ensures that the connector 3 does not occupy additional space in the battery relative to the end cap body 1, effectively guaranteeing the battery's energy density. Furthermore, the connector 3 does not protrude from the opening of the second receiving groove 12, thus providing a certain degree of safety protection for the connector 3 and extending its service life.

[0071] Please refer to Figures 2-3. In some embodiments, the heights of the first receiving groove 211 and the second receiving groove 12 are the same along the thickness direction of the end cap body 1.

[0072] As described above, this ensures that the connector 3 can be flatly and snugly placed in the first receiving groove 211 and the second receiving groove 12 respectively, so as to ensure the reliable and stable connection of the connector 3 and ensure its performance.

[0073] In some embodiments of this application, the connection between the connector 3 and the pole body 21 has a first welding mark, and the connection between the connector 3 and the end cap body 1 has a second welding mark. The connector 3 is fixedly connected to the pole body 21 and the end cap body 1 through the first welding mark and the second welding mark, respectively.

[0074] It should be noted that the inner ring portion of the connector 3 is welded to the first receiving groove 211 to form a first welding mark in the first receiving groove 211; the outer ring portion of the connector 3 is welded to the second receiving groove 12 to form a second welding mark in the second receiving groove 12.

[0075] As shown above, the connector 3 is directly welded between the pole body 21 and the end cap body 1, which facilitates production and processing, and the processing technology is easy to control.

[0076] Example 1

[0077] Please refer to Figures 1-3. The pole assembly 2 includes a pole body 21 and a first pole plate 22. The radial dimension of the pole body 21 is smaller than the radial dimension of the first pole plate 22. The pole body 21 is at least partially inserted through the pole mounting hole 11. The first pole plate 22 is located on the side of the end cap body 1 near the second surface. The pole body 21 has a first receiving groove 211 formed along its circumference. The first surface of the end cap body 1 has a second receiving groove 12. The inner ring portion of the connector 3 is welded to the first receiving groove 211, and the outer ring portion of the connector 3 is welded to the second receiving groove 12.

[0078] Example 2

[0079] Please refer to Figures 4-6. The pole assembly 2 includes a pole body 21 and a first pole plate 22. The radial dimension of the pole body 21 is smaller than the radial dimension of the first pole plate 22. The pole body 21 is at least partially inserted through the pole mounting hole 11. The first pole plate 22 is located on the side of the end cap body 1 near the second surface. The connector 3 is at least partially located between the pole body 21 and the end cap body 1, and the connector 3 extends to the first surface of the end cap body 1.

[0080] It should be noted that the connector 3 is integrally connected to the pole body 21 via injection molding. Further, referring to Figures 5-6, the pole body 21 has a radially inwardly recessed snap-fit ​​groove 212. The connector 3 includes a snap-fit ​​portion 31 injection-molded within the snap-fit ​​groove 212. The snap-fit ​​groove 212 and the snap-fit ​​portion 31 provide a limiting fit, thereby achieving a fixed connection between the connector 3 and the pole body 21. The portion of the connector 3 extending to the first surface of the end cap body 1 covers the first communication opening of the gap, thereby sealing the gap between the pole body 21 and the pole mounting hole 11.

[0081] As mentioned above, the connector 3 not only achieves the physical connection between the pole body 21 and the end cap body 1, but also seals the gap between the pole body 21 and the pole mounting hole 11. This eliminates the need to install a sealing ring at the gap or apply plastic at the first connection port on the first surface, thus saving on the material costs of the sealing ring and the plastic (PPS plastic) as well as the process costs.

[0082] Example 3

[0083] Referring to Figure 7, the pole assembly 2 includes a pole body 21, a first pole plate 22, and a second pole plate 23. The pole body 21 at least partially passes through the pole mounting hole 11. The first pole plate 22 is located on the side of the end cap body 1 near the second surface, and the second pole plate 23 is located on the side of the end cap body 1 near the first surface. Along the thickness direction of the end cap body 1, the projection of the second pole plate 23 covers the projection of the pole mounting hole 11; the connector 3 is at least partially located between the second pole plate 23 and the first surface of the end cap body 1.

[0084] In this embodiment, the connector 3 replaces the upper plastic structure in the prior art. The connector 3 not only realizes the physical connection between the pole body 21 and the end cap body 1, but also seals the gap between the pole body 21 and the pole mounting hole 11. There is no need to set the upper plastic between the second pole plate 23 and the first surface of the end cap body 1, saving the material cost and process cost of the upper plastic (PPS plastic).

[0085] Example 4

[0086] Please refer to Figures 8-9. The electrode assembly 2 includes an electrode body 21, a first electrode plate 22, a second electrode plate 23, and a first insulating member 24. The electrode body 21 is at least partially inserted through the electrode mounting hole 11. The first electrode plate 22 is located on the side of the end cap body 1 near the second surface, and the second electrode plate 23 is located on the side of the end cap body 1 near the first surface. Along the thickness direction of the end cap body 1, the projection of the second electrode plate 23 overlaps the projection of the electrode mounting hole 11. The first insulating member 24 is at least partially located between the second electrode plate 23 and the first surface of the end cap body 1. The first insulating member 24 is provided with a first through hole, and the connector 3 is at least partially located in the first through hole, and the connector 3 is connected to the second electrode plate 23 and the end cap body 1 respectively.

[0087] It should be noted that the pole assembly 2 includes a sealing ring 25, which is at least partially located between the pole body 21 and the end cap body 1, and extends to the second surface of the end cap body 1 between the first pole plate 22.

[0088] The second pole plate 23 has a second through hole corresponding to the position of the first through hole, and the end cap body 1 has a third through hole corresponding to the position of the first through hole. The first and second through holes are through holes, and the third through hole is a blind hole. The connector 3 is a pin. The connector 3 passes through the second through hole, the first through hole, and the third through hole in sequence to achieve the physical connection between the second pole plate 23 and the end cap body 1 through the connector 3.

[0089] In some embodiments of this application, the connector 3 is a semiconductor connector, which is any one of silicon carbide connector, gallium nitride connector, gallium arsenide connector, and indium phosphide connector.

[0090] Semiconductor connectors exhibit insulating properties under normal battery conditions and conductive properties under reverse high-voltage loading conditions. The specific material type of the semiconductor connector can be selected according to actual needs, making it highly flexible and adaptable.

[0091] In summary, this application also provides a battery, which includes a battery casing and an electrode assembly disposed inside the battery casing; the battery casing includes a housing having an opening at at least one end, and a battery end cap structure as described above, which covers the opening. The first surface of the end cap body 1 of the battery end cap structure is the outer surface of the battery casing; the electrode assembly is electrically connected to the terminal post assembly 2 of the battery end cap structure.

[0092] Since the battery of this application has the battery end cap structure as described above, the beneficial effects of the battery end cap structure are described above and will not be repeated here.

[0093] The battery can be a rechargeable battery, which refers to a battery that can be recharged after discharge to activate the active materials and continue to be used. The battery can 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 application does not limit this. As an example, the battery can be a cylindrical battery, a prismatic battery, a pouch battery, or a battery of other shapes. Prismatic batteries include prismatic batteries, blade-shaped batteries, and multi-prismatic batteries, such as hexagonal prismatic batteries, etc., and this application does not have any particular limitations. Preferably, the battery is a lithium-ion battery, and the battery is a blade-shaped battery.

[0094] In summary, this application also provides a battery pack, which includes at least one battery as described above. A battery pack refers to a single physical module comprising one or more batteries to provide higher voltage and capacity. Multiple battery packs are arranged and fixed to form a battery module.

[0095] In summary, this application also provides an electrical device that includes the battery as described above.

[0096] Since the electrical device of this application includes the battery as described above, the beneficial effects of the battery on the electrical device are described above and will not be repeated here.

[0097] Batteries or battery packs power electrical devices. These devices can take many forms, such as automobiles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Automobiles can be gasoline-powered, natural gas-powered, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. 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. This document does not impose any special restrictions on the aforementioned electrical devices.

[0098] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not restrict this application from necessarily using the aforementioned specific details for implementation.

[0099] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0100] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0101] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0102] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0103] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery end cap structure, characterized in that, include: An end cap body (1) has a first surface and a second surface along its thickness direction. The end cap body (1) has a terminal mounting hole (11) that penetrates the first surface and the second surface. A terminal assembly (2) is at least partially disposed in the terminal mounting hole (11). A connector (3) connects the end cap body (1) and the terminal assembly (2). When the battery is in normal working condition, the connector (3) provides an insulating connection between the end cap body (1) and the terminal assembly (2). When the battery is under reverse high voltage loading, the connector (3) provides an conductive connection between the end cap body (1) and the terminal assembly (2).

2. The battery end cap structure according to claim 1, characterized in that, The pole assembly (2) includes a pole body (21), which passes through the pole mounting hole (11) and has a gap with the pole mounting hole (11); the connector (3) is located on the first surface of the end cap body (1) to connect the end cap body (1) and the pole body (21); the connector (3) fills the gap, or the connector (3) covers the first communication opening of the gap on the first surface to seal the gap.

3. The battery end cap structure according to claim 2, characterized in that, The pole body (21) has a first receiving groove (211) formed along its circumference, and the connector (3) is an annular part, with the inner ring part of the connector (3) being sealed to the first receiving groove (211).

4. The battery end cap structure according to claim 3, characterized in that, The first surface of the end cap body (1) is provided with a second receiving groove (12); the outer ring of the connector (3) is sealed to the second receiving groove (12).

5. The battery end cap structure according to claim 4, characterized in that, Along the thickness direction of the end cap body (1), the connector (3) does not protrude from the opening of the first receiving groove (211); and / or, along the thickness direction of the end cap body (1), the connector (3) does not protrude from the opening of the second receiving groove (12); and / or, along the thickness direction of the end cap body (1), the heights of the first receiving groove (211) and the second receiving groove (12) are the same.

6. The battery end cap structure according to claim 2, characterized in that, The connector (3) has a first weld mark at the connection point with the pole body (21), and the connector (3) has a second weld mark at the connection point with the end cap body (1).

7. The battery end cap structure according to claim 1, characterized in that, The pole assembly (2) includes a pole body (21) and a first pole plate (22), wherein the radial dimension of the pole body (21) is smaller than the radial dimension of the first pole plate (22), and the pole body (21) is at least partially inserted through the pole mounting hole (11); the first pole plate (22) is located on the side of the end cap body (1) near the second surface; the connector (3) is at least partially located between the pole body (21) and the end cap body (1), and the connector (3) extends to the end cap body (21). 1) The first surface; or, the pole assembly (2) includes a pole body (21), a first pole plate (22) and a second pole plate (23), the pole body (21) at least partially passing through the pole mounting hole (11), the first pole plate (22) being located on the side of the end cap body (1) near the second surface, and the second pole plate (23) being located on the side of the end cap body (1) near the first surface; along the thickness direction of the end cap body (1), the projection of the second pole plate (23) covers the pole. The projection of the mounting hole (11); the connector (3) is at least partially located between the second pole plate (23) and the first surface of the end cap body (1); or, the pole assembly (2) includes a pole body (21), a first pole plate (22), a second pole plate (23) and a first insulating element (24), the pole body (21) being at least partially inserted through the pole mounting hole (11); the first pole plate (22) is located on the side of the end cap body (1) near the second surface, and the second pole plate (23) is located on the side of the end cap body (1) near the second surface. The end cap body (1) is located on the side near the first surface; along the thickness direction of the end cap body (1), the projection of the second pole plate (23) covers the projection of the pole mounting hole (11); the first insulating member (24) is at least partially located between the second pole plate (23) and the first surface of the end cap body (1), the first insulating member (24) is provided with a first through hole, the connector (3) is at least partially located in the first through hole, and is connected to the second pole plate (23) and the end cap body (1) respectively.

8. The battery end cap structure according to any one of claims 1-7, characterized in that, The connector (3) is a semiconductor connector, which is any one of silicon carbide connector, gallium nitride connector, gallium arsenide connector, and indium phosphide connector.

9. A battery, characterized in that, The battery includes a battery casing and an electrode assembly disposed inside the battery casing; the battery casing includes a housing having an opening at at least one end, and a battery end cap structure as described in any one of claims 1-8 that covers the opening; the first surface of the end cap body (1) of the battery end cap structure is the outer surface of the battery casing; the electrode assembly is electrically connected to the terminal post assembly (2) of the battery end cap structure.

10. An electrical appliance, characterized in that, Includes the battery as described in claim 9.

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