WO2024026669A1

WO2024026669A1 - End cap assembly, battery cell, battery and electrical device

Info

Publication number: WO2024026669A1
Application number: PCT/CN2022/109662
Authority: WO
Inventors: 李贺远
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2024-02-08

Abstract

The present application relates to an end cap assembly (25), a battery cell (22), a battery (20) and an electrical device. The end cap assembly (25) comprises a cap body (100), a connector (200), an electrode terminal (300) and a first insulator (400). The connector (200) is insulated from the cap body (100) and is provided on the outer end face (100b) of the cap body (100). The electrode terminal (300) is riveted to the connector (200) and the cap body (100). The end of the first insulator (400) facing away from the outer end face (100b) is not higher than the end of the electrode terminal (300) penetrating through the outer end face (100b). The battery cell (22) comprises a housing (23) and an end cap assembly (25). The electrical device comprises a battery cell (22) or a battery (20). According to the end cap assembly (25), the battery cell (22), the battery (20) and the electrical device, the height of the electrode terminal (300) extending out of the outer end face (100b) of the cap body (100) in the thickness direction of the cap body (100) is reduced.

Description

End cover components, battery cells, batteries and electrical equipment

Technical field

The present application relates to the technical field of power batteries, and more specifically, to an end cover assembly, a battery cell, a battery and electrical equipment.

Background technique

With the popularization and promotion of new energy vehicles, the charging and discharging performance and endurance of new energy vehicles have attracted increasing attention and attention. Power battery is a rechargeable battery that is the power source of new energy vehicles and is widely used in the field of new energy vehicles.

In the existing end cover assembly of the battery cell, the electrode terminals are welded to the aluminum pressing blocks to fix the electrode terminals. In order to ensure the welding quality, the aluminum pressing block needs a certain thickness, which makes the overall thickness of the end cover assembly too thick, takes up a lot of space, and reduces the space utilization of the battery cells.

Contents of the invention

In view of this, this application discloses an end cover assembly, a battery cell, a battery and an electrical device.

An end cover assembly includes a cover body, a connecting piece, an electrode terminal and a first insulating piece. The cover body is provided with a first mounting hole, and the first mounting hole penetrates the outer end surface and the inner end surface of the cover body along the thickness direction of the cover body. The inner end face is configured to face the accommodation cavity of the battery cell; the connecting piece is insulated from the cover body and is provided on the outer end face of the cover body; the electrode terminal is penetrated through the first mounting hole and riveted with the connecting piece and the cover body; the third An insulating member is wrapped around the outer periphery of the connecting member, and in the thickness direction of the cover, the end of the first insulating member away from the outer end face is not higher than the end of the electrode terminal that penetrates the outer end face.

Compared with the structure in which the first insulating member is placed on the cover, the connecting member is placed on the first insulating member, and then the electrode terminals are riveted and press-fitted with the connecting member and the cover. The above-mentioned end cover assembly connects the electrode terminals to the cover. The parts and the cover are riveted together respectively, and the first insulating part is wrapped around the outer periphery of the connecting part, which is equivalent to inserting the connecting part into the inside of the first insulating part, instead of placing the connecting part above the first insulating part, thereby lowering the The riveting position of the connector and the electrode terminal in the thickness direction of the cover body reduces the height of the electrode terminal protruding from the outer end surface of the cover body in the thickness direction of the cover body; furthermore, when the battery cells are assembled into the box , which can improve the space utilization above the electrode terminals in the battery cell, thereby allowing the box to accommodate more or larger battery cells, and indirectly increasing the battery cell capacity in the box.

In some embodiments, the end cap assembly further includes an insulating support member. The insulating support member is sandwiched between the outer end surface and the connecting member. A spacing space is formed between the connecting member and the cover body, and the first insulating member is filled in the spacing space. And wrapped around the outer periphery of the connector. In this way, the insulating support member serves as an insulating support to insulate the connecting member and the cover from each other; the first insulating member is filled in the interval space and wrapped around the outer periphery of the connecting member, further fixing the position of the connecting member.

In some embodiments, the outer end surface is provided with a first groove for accommodating the first insulating member. The bottom wall of the first groove is provided with an installation groove for partially accommodating the insulating support member. The side wall of the insulating support member is in contact with the installation member. There is a space between the side walls of the trough. In this way, there is a gap between the side wall of the insulating support member and the side wall of the installation slot. When the first insulating member is injected and filled, the first insulating member can fully contact the cover and the insulating support member, thereby increasing the contact area and thereby improving the structure. stability.

In some of these embodiments, the mounting slot is circular and the insulating support is in the shape of a Mitsubishi column. In this way, there is a gap between the side wall of the insulating support member and the side wall of the installation groove, which can reserve space for the subsequent injection molding of the first insulating member.

In some embodiments, a limiting structure is provided on the inner wall of the first groove, and the limiting structure is limitedly matched with the first insulating member. In this way, the provision of the limiting structure can enhance the limiting effect between the first insulating member and the cover.

In some embodiments, the insulating support member has a solid columnar structure or a hollow annular structure. In this way, the insulation support member can be designed more flexibly according to actual needs.

In some of these embodiments, the first insulating member is an injection molded structure. In this way, the first insulating piece has good integrity and directly wraps the connecting piece, which is equivalent to reducing the height of the connecting piece protruding from the outer end face in the thickness direction of the cover, which is also conducive to thinning the entire end cover assembly. thickness.

In some embodiments, the electrode terminal includes a limiting portion and a main body portion fixed to the limiting portion. The limiting portion is limited and contacts the inner end face. The main body portion penetrates the first mounting hole and extends out of the outer end face. The main body portion extends out of the outer end face. One end of the outer end surface is in limited contact with the connecting piece to rivet and cooperate with the connecting piece and the cover. In this way, after the main part penetrates the cover and the connecting piece, the limiting part is limited and abutted against the inner end surface, and one end of the main part extending out of the outer end surface is limited and abutted against the connecting piece, thereby achieving riveting cooperation with the connecting piece and the covering, and the structure is stable. , no welding required.

In some embodiments, the connecting piece includes a first connecting section, an inclined section and a second connecting section. The second connecting section and the first connecting section are respectively provided at both ends of the inclined section, and one end of the main body extends out of the outer end surface to limit the position. Abutting against the side of the first connecting section away from the outer end surface, the second connecting section is disposed on the outer end surface and is insulated from the cover. In this way, the end of the main body is riveted to the first connecting section, and the first connecting section of the connecting piece is subjected to the riveting pressure during riveting. The connecting structure of the first connecting section, the inclined section and the second connecting section is a bending structure. , the structure is not easily deformed by riveting pressure and has good structural stability.

In some embodiments, the first connecting section is an annular structure provided with a second mounting hole, the main body portion includes a connected first pole portion and a second pole portion, and the first pole portion is connected to the limiting portion. And penetrated through the first mounting hole and the second mounting hole, one end of the first pole portion extending out of the second mounting hole is connected to the second pole portion, and the second pole portion and the first connecting section are away from the outer end surface Limit abutment on one side. In this way, after the first pole part and the second pole part pass through the cover and the connector, the second pole part is riveted on the first connection section, thereby smoothly fixing the connector and the electrode terminal.

In some embodiments, the end cover assembly further includes a second insulating member. The second insulating member is disposed on one side of the inner end surface of the cover body. One end of the electrode terminal is riveted and matched with the connecting member, and the other end of the electrode terminal passes through the third insulating member. The two insulating members are in contact with the end surface of the second insulating member facing away from the cover body. In this way, the cover body and the electrode terminal are insulated.

In some embodiments, a second groove is provided on a side of the cover away from the connecting member, and the second insulating member is partially received in the second groove and is in clearance fit with the side walls of the two grooves. In this way, by defining the position of the second insulating member, the stability of the structure is further improved.

In some embodiments, the end cap assembly further includes a sealing member disposed between the main body and the second insulating member. In this way, the main body part and the second insulating member are isolated by the sealing member, thereby improving the sealing performance of the entire structure.

A battery cell includes a casing and the above-mentioned end cover assembly. The casing has an opening, and the cover is disposed in the opening. The above-mentioned battery cells have high space utilization.

A battery includes a box body and the above-mentioned battery cell, and the battery cell is arranged in the box body. The above-mentioned battery has high space utilization, and the box can accommodate more or larger battery cells, which indirectly increases the capacity of the battery cells in the box.

An electrical device includes the above-mentioned battery cell, which is used to provide electric energy, or includes the above-mentioned battery, which is used to provide electric energy. The above-mentioned electrical equipment has a high utilization rate of the layout space within the electrical equipment to accommodate more or larger battery cells and obtain greater battery life.

Description of drawings

In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only This is an embodiment of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the disclosed drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a vehicle in an embodiment;

Figure 2 is a schematic diagram of a battery in an embodiment;

Figure 3 is a schematic diagram of a battery cell in an embodiment;

Figure 4 is an exploded view of the end cap assembly of the first embodiment;

Figure 5 is a top view of the end cap assembly shown in Figure 4;

Figure 6 is a cross-sectional view of the end cap assembly shown in Figure 5 along the A-A plane;

FIG. 7 is a schematic diagram of the cover body in the end cover assembly shown in FIG. 5 .

Detailed ways

In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific implementation modes of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without violating the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply the device or device referred to. Elements must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations on the application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified limitations. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Based on the above considerations and after in-depth research, an end cover assembly, battery cell, battery and electrical equipment were designed. In the end cover assembly of the battery cell, the electrode terminals, the connecting piece and the cover are riveted and matched respectively, and the first insulating piece is wrapped around the outer periphery of the connecting piece, which is equivalent to inserting the connecting piece into the first insulating piece instead of The connecting piece is placed above the first insulating piece, and then by lowering the riveting position of the connecting piece and the electrode terminal in the thickness direction of the cover, the outer end surface of the electrode terminal protruding out of the cover in the thickness direction of the cover is reduced. height; then when the battery cells are assembled into the box, the space utilization above the electrode terminals in the battery cells can be improved, which in turn allows the box to accommodate more or larger battery cells, indirectly improving the space inside the box. Battery cell capacity.

Embodiments of the present application provide an electrical device that uses a battery as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

For the convenience of explanation in the following embodiments, an electrical device in an embodiment of the present application is a vehicle 10 as an example.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 10 provided by some embodiments of the present application. The vehicle 10 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle. The battery 20 is disposed inside the vehicle 10 , and the battery 20 can be disposed at the bottom, head, or tail of the vehicle 10 . The battery 20 may be used to power the vehicle 10 , for example, the battery 20 may serve as an operating power source for the vehicle 10 . The vehicle 10 may also include a controller 11 and a motor 12. The controller 11 is used to control the battery 20 to provide power to the motor 12, for example, for starting, navigating, and driving the vehicle 10 to meet the operating power requirements. In other embodiments of the present application, the battery 20 can not only be used as an operating power source of the vehicle 10 , but also can be used as a driving power source of the vehicle 10 , replacing or partially replacing fuel or natural gas to provide driving force for the vehicle 10 .

Please refer to FIG. 2 , which is an exploded view of the battery 20 provided in some embodiments of the present application. The battery 20 includes a case 21 and a battery cell 22. The battery cell 22 is accommodated in the case 21. Among them, the box 21 is used to provide a storage space for the battery cells 22, and the box 21 can adopt a variety of structures. In some embodiments, the box 21 may include a first part 21a and a second part 21b, the first part 21a and the second part 21b cover each other, the first part 21a and the second part 21b jointly define a space for accommodating the battery cell 22 of accommodation space. The second part 21b may be a hollow structure with an opening 23a at one end, and the first part 21a may be a plate-like structure. The first part 21a covers the opening side of the second part 21b, so that the first part 21a and the second part 21b jointly define an accommodation space. Space; the first part 21a and the second part 21b can also be hollow structures with one side open, and the open side of the first part 21a is covered with the open side of the second part 21b. Of course, the box 21 formed by the first part 21a and the second part 21b can be in various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery 20 , there may be a plurality of battery cells 22 , and the plurality of battery cells 22 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 22 are connected in series and in parallel. The plurality of battery cells 22 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 22 can be accommodated in the box 21 ; of course, the battery 20 can also be a plurality of battery cells 22 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 21 .

Each battery cell 22 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 22 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes. In some embodiments of the present application, the battery cell 22 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery. The embodiments of the present application do not specify this. Not limited. The battery cell 22 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped or other shapes, and the embodiments of the present application are not limited thereto.

The following describes any battery cell 22 in detail. As shown in FIG. 3 , the battery cell 22 includes a case 23 , an electrode assembly 24 and an end cap assembly 25 . The housing 23 is a hollow rectangular parallelepiped or a cube. One plane of the housing 23 has an opening 23 a. This plane is configured without a wall so that the inside and outside of the housing 23 are connected. The end cap assembly 25 covers the opening 23a and is connected to the housing 23 to form a receiving cavity for placing the electrode assembly 24. The receiving cavity is filled with electrolyte, such as electrolyte.

The electrode assembly 24 has a first pole piece, a second pole piece and a diaphragm. The first pole piece, the second pole piece and the diaphragm are rolled or stacked to form the electrode assembly 24. The first pole piece is not shown in the drawings of this application. , the second pole piece and the separator, but those skilled in the art will understand how the first pole piece, the second pole piece and the separator are rolled or stacked to form the electrode assembly 24, which will not be described in detail here.

Please refer to Figure 4. The end cover assembly 25 in one embodiment includes a cover body 100, a connector 200, an electrode terminal 300 and a first insulating member 400. The cover body 100 is provided with a first mounting hole 103. The first mounting hole 103 is formed along the The thickness direction of the cover 100 runs through the outer end surface 100b and the inner end surface 100a of the cover 100, and the inner end surface 100a is configured to face the receiving cavity of the battery cell 22; with reference to Figures 5 and 6, the connector 200 is connected to the cover 100 The insulation is provided on the outer end surface 100b of the cover 100. The electrode terminal 300 is installed in the first mounting hole 103 and is riveted and matched with the connector 200 and the cover 100 respectively; the first insulating member 400 is wrapped around the outer periphery of the connector 200, and In the thickness direction of the cover 100, the end of the first insulating member 400 facing away from the outer end surface 100b is not higher than the end of the electrode terminal 300 that penetrates the outer end surface 100b.

Here, the thickness direction of the cover 100 is the Y direction shown in FIG. 4 .

In some embodiments of the present application, the cover 100 is a component that covers the opening 23 a of the housing 23 of the battery cell 22 to isolate the accommodation cavity of the battery cell 22 from the external environment. The shape of the cover 100 can be adapted to the shape of the housing 23 to fit the housing 23. Alternatively, the cover 100 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the cover 100 can be It is less likely to deform during extrusion and collision, so that the battery cell 22 can have higher structural strength and its safety performance can also be improved. The cover 100 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiments of the present application.

In some embodiments of the present application, the connector 200 is used to rivet with the electrode terminal 300 to fix the electrode terminal 300. The connector 200 is made of aluminum alloy to prevent deformation during riveting.

In some embodiments of the present application, the electrode terminal 300 is used to electrically connect with the electrode assembly 24 of the battery cell 22 to output or input electrical energy of the battery cell 22 .

In some embodiments of the present application, the first insulating member 400 is an electrical connection component used to isolate the connector 200 and the cover 100 to reduce the risk of short circuit. For example, the first insulating member 400 may be plastic.

The above-mentioned end cover assembly 25 rivets the electrode terminal 300 to the connector 200 and the cover 100 respectively, and wraps the first insulating member 400 around the periphery of the connector 200, which is equivalent to inserting the connector 200 into the first insulating member 400. , instead of placing the connector 200 above the first insulating member 400 , by lowering the riveting position of the connector 200 and the electrode terminal 300 in the thickness direction of the cover 100 , the electrode terminal 300 is lowered on the cover 100 The height of the outer end surface 100b of the cover 100 protrudes in the thickness direction of 100; thus, when the battery cell 22 is assembled into the box 21, the space utilization rate above the electrode terminal 300 in the battery cell 22 can be improved, thereby making it possible to The box 21 accommodates more or larger battery cells 22, which indirectly increases the battery cell capacity in the box 21.

According to some embodiments of the present application, please refer to FIG. 6 , the end cover assembly 25 further includes an insulating support member 500 , the insulating support member 500 is sandwiched between the outer end surface 100 b and the connecting member 200 , between the connecting member 200 and the cover 100 A space is formed between them, and the first insulating member 400 is filled in the space and wrapped around the outer periphery of the connecting member 200 .

It should be noted that the outer end surface 100b of the cover 100 and the connector 200 are insulated and initially positioned by the insulating support member 500, and then the first insulating member 400 is formed by injection molding, so that the first insulating member 400 is filled in the separation space. And wrapped around the outer periphery of the connecting piece 200, and finally the electrode terminal 300 is riveted to the connecting piece 200 and the cover 100 respectively.

Through the above arrangement, the insulating support member 500 plays the role of insulating support, so that the connecting member 200 and the cover 100 are insulated from each other; the first insulating member 400 is filled in the separation space and wrapped around the outer periphery of the connecting member 200 to protect the connecting member. Further fixation of the 200 position.

According to some embodiments of the present application, please refer to Figure 4. The outer end surface 100b is provided with a first groove 101 for accommodating the first insulating member 400. With reference to Figure 6, the bottom wall of the first groove 101 is provided with a partial space. The mounting slot 102 of the insulating support member 500 is placed, and there is a gap between the side walls of the insulating support member 500 and the side walls of the mounting slot 102 .

In some embodiments of the present application, the first groove 101 is square, and the depth of the first groove 101 is 0.2 mm to 0.5 mm. The depth is also the dimension along the Y direction shown in FIG. 6 . The first groove 101 can also be in a circular or other shape, and the depth of the first groove 101 can also be set to other values.

In some embodiments of the present application, the depth of the installation groove 102 is smaller than the thickness of the insulating support 500 so that a space is left between the outer end surface 100b of the cover 100 and the connector 200 in the thickness direction.

Through the above arrangement, there is a gap between the side wall of the insulating support member 500 and the side wall of the installation groove 102. When the first insulating member 400 is injected and filled, the first insulating member 400 can fully contact the cover 100 and the insulating support member 500. Increase the contact area, thereby improving the stability of the structure.

According to some embodiments in the present application, please refer to FIGS. 4 and 6 , the installation slot 102 is circular, and the insulating support 500 is in the shape of a Mitsubishi column.

In this embodiment, the number of the mounting slot 102 and the insulating support member 500 is not limited to one. That is, the number of the mounting slot 102 and the insulating support member 500 can be at least two. The mounting slot 102 corresponds to the insulating support member 500 one by one. set up. When the number of the mounting slots 102 and the insulating support members 500 is at least two, the mounting slots 102 may be arranged in a rectangular array, a circular array, or other arrangements. Correspondingly, the insulating support members 500 may also be arranged in a rectangular array or a circular array. array or other arrangement.

In other embodiments, at least two insulating supports 500 may be disposed in each mounting slot 102 , and the mounting slots 102 102 and the insulating supporting members 500 may also be in other shapes.

Through the above arrangement, there is a gap between the side walls of the insulating support member 500 and the side walls of the mounting groove 102 , which can leave space for the subsequent injection molding of the first insulating member 400 .

According to some embodiments in this application, please refer to FIG. 6 , the inner wall of the first groove 101 is provided with a limiting structure, and the limiting structure cooperates with the first insulating member 400 for limiting.

In some embodiments of the present application, the limiting structure may be a protrusion protruding from the inner wall of the first groove 101 , or a depression recessed from the inner wall of the first groove 101 . The bumps or dimples can be round, square or other shapes.

Through the above arrangement, the arrangement of the limiting structure can enhance the limiting effect between the first insulating member 400 and the cover 100 .

According to some embodiments in this application, please refer to FIG. 6 , the insulating support member 500 has a solid columnar structure or a hollow annular structure.

For example, the insulating support member 500 can be in the shape of a solid cylinder or a prism, and has high mechanical strength. Alternatively, the insulating support member 500 may be in the shape of a circular ring or an elliptical ring, thereby further reducing the weight of the insulating support member 500 while meeting the mechanical strength requirements.

Through the above arrangement, the insulating support member 500 can be designed more flexibly according to actual needs.

According to some embodiments in the present application, please refer to FIG. 6 , the first insulating member 400 is an injection molded structure.

It should be noted that the outer end surface 100b of the cover 100 and the connector 200 are insulated and initially positioned by the insulating support member 500, and then the first insulating member 400 is formed by injection molding, and finally the electrode terminal 300 is connected to the connector 200 and the connector 200. The covers 100 are riveted and matched respectively.

Through the above arrangement, the first insulating member 400 has good integrity and directly wraps the connecting member 200, which is equivalent to reducing the height of the connecting member 200 protruding from the outer end surface 100b in the thickness direction of the cover 100, which is further beneficial to The overall thickness of the end cap assembly 25 is reduced.

According to some embodiments of the present application, please refer to Figures 5 and 6. The electrode terminal 300 includes a limiting portion 310 and a main body portion 320 fixed to the limiting portion 310. The limiting portion 310 is limited and contacts the inner end surface 100a. The portion 320 penetrates the first mounting hole 103 and extends out of the outer end surface 100b. One end of the main body portion 320 extends out of the outer end surface 100b and is in limited contact with the connector 200 to rivet with the connector 200 and the cover 100.

In some embodiments of the present application, the limiting part 310 and the main part 320 are an integrally formed structure, which has good integrity and high mechanical strength.

It should be noted that after the main body 320 is inserted through the cover 100 and the connector 200 , pressure is applied to the end of the main body 320 by riveting, so that the end of the main body 320 is riveted to the connector 200 .

Through the above arrangement, after the main body part 320 penetrates the cover 100 and the connector 200, the limiting part 310 is limited and abutted against the inner end surface 100a. The connecting piece 200 and the cover body 100 are riveted and matched, and the structure is stable without welding.

According to some embodiments of the present application, please refer to FIG. 6 . The connecting member 200 includes a first connecting section 210 , an inclined section 220 and a second connecting section 230 . The second connecting section 230 and the first connecting section 210 are respectively provided in the inclined section. 220 at both ends, one end of the main body 320 extending out of the outer end surface 100b is limited and abutted on the side of the first connecting section 210 away from the outer end surface 100b, and the second connecting section 230 is provided on the outer end surface 100b and is insulated from the cover 100 .

In some embodiments of the present application, the inclined section 220 extends on a plane intersecting the thickness direction of the cover 100 , the first connecting section 210 extends on a plane perpendicular to the thickness direction of the cover 100 , and the second connecting section 230 extends on a plane perpendicular to the thickness direction of the cover 100 . Extending on a plane perpendicular to the thickness direction of the cover 100 , one end of the inclined section 220 connected to the first connecting section 210 points to an end of the inclined section 220 connected to the second connecting section 230 , and the inclined section 220 is inclined away from the cover 100 . The inclined section 220 is in contact with the cover 100, and the second connecting section 230 is overlapped with the cover 100. One end of the electrode terminal 300 passes through the connector 200 and is in limited contact with the first connecting section 210. The other end is riveted and matched with the cover body 100 . Here, the direction is perpendicular to the thickness direction of the cover 100 , that is, the X direction shown in FIG. 6 , and intersects with the thickness direction of the cover 100 , that is, the direction that intersects with the Y direction shown in FIG. 6 .

In some embodiments of the present application, the second connecting section 230, the first connecting section 210 and the inclined section 220 are integrally formed structures, and the connecting piece 200 is formed by stamping. The second connecting section 230 and the first connecting section 210 extend on different planes perpendicular to the thickness direction of the cover 100 , that is, there is a height difference between the second connecting section 230 and the first connecting section 210 along the thickness direction of the cover 100 .

Optionally, the height difference between the second connecting section 230 and the first connecting section 210 is 1 mm to 3 mm, and the thickness of the first connecting section 210 , the inclined section 220 and the second connecting section 230 is 0.7 mm to 1.5 mm.

Through the above arrangement, the end of the main body 320 is riveted to the first connecting section 210. During riveting, the first connecting section 210 of the connecting piece 200 is subjected to the riveting pressure stress. The first connecting section 210, the inclined section 220 and the second connecting section The connection structure of section 230 is a bending structure, which is not easily deformed by riveting pressure and has good structural stability.

According to some embodiments of the present application, please refer to Figures 5 and 6. The first connecting section 210 is an annular structure provided with a second mounting hole 201, and the main body portion 320 includes a connected first pole portion 321 and a second The pole part 322, the first pole part 321 is connected to the limiting part 310 and penetrates the first mounting hole 103 and the second mounting hole 201. The first pole part 321 extends out of one end of the second mounting hole 201 and the second mounting hole 201. The two pole portions 322 are connected, and the second pole portion 322 is in limited contact with a side of the first connecting section 210 away from the outer end surface 100b.

In some embodiments of the present application, the first pole part 321 and the second pole part 322 are integrally formed structures, with good integrity and high mechanical strength. The outer diameter of the second pole part 322 is larger than the outer diameter of the first pole part 321, and the second pole part 322 is deformed by riveting.

In some embodiments of the present application, both the first pole part 321 and the second pole part 322 are cylindrical, and the first mounting hole 103 and the second mounting hole 201 are both round holes. The first pole part 321 and the second pole part 322 may also be in the shape of a prism or other shapes, and the first mounting hole 103 and the second mounting hole 201 may also be in the shape of a square hole or other shapes. Here, the shapes of the first mounting hole 103 and the second mounting hole 201 are not specifically limited.

Through the above arrangement, after the first pole part 321 and the second pole part 322 pass through the cover 100 and the connector 200, the second pole part 322 is riveted to the first connecting section 210, so that the connection between the connector 200 and the connector 200 is smoothly realized. The electrode terminal 300 is fixed.

According to some embodiments of the present application, please refer to FIG. 6 , the end cover assembly 25 further includes a second insulating member 600 , the second insulating member 600 is disposed on one side of the inner end surface 100 a of the cover 100 , and one end of the electrode terminal 300 is connected to The connecting member 200 is riveted and matched, and the other end of the electrode terminal 300 passes through the second insulating member 600 and is limitedly abutted against the end surface of the second insulating member 600 facing away from the cover 100 .

Through the above arrangement, insulation between the cover 100 and the electrode terminal 300 is achieved.

According to some embodiments of the present application, please refer to FIG. 6 , a second groove 104 is provided on the side of the cover 100 away from the connector 200 , and the second insulating member 600 is partially accommodated in the second groove 104 and connected with the two second grooves 104 . The sidewalls of groove 104 have a clearance fit.

It should be noted that the second groove 104, the first groove 101 and the first mounting hole 103 are all opened in the cover 100 and communicate with each other.

In some embodiments of the present application, the second insulating member 600 is an electrical connection component used to isolate the cover 100 and the electrode terminal 300 to reduce the risk of short circuit. For example, the second insulating member 600 may be plastic, rubber, or the like.

In some embodiments of the present application, the second groove 104 and the second insulating member 600 have an interference fit. Optionally, the depth of the second groove 104 is 0.5mm˜1.0mm.

Through the above arrangement, by defining the position of the second insulating member 600, the stability of the structure is further improved.

According to some embodiments in this application, please refer to FIG. 6 , the end cap assembly 25 further includes a sealing member 700 , and the sealing member 700 is disposed between the main body part 320 and the second insulating member 600 .

Here, the sealing member 700 is annular. The sealing member 700 is sleeved on the outer periphery of the main body 320 and is limited in the second insulating member 600 . For example, the seal 700 may be plastic, rubber, or the like.

Through the above arrangement, the main body part 320 and the second insulating member 600 are isolated by the sealing member 700, thereby improving the sealing performance of the entire structure.

Please refer to FIG. 3 . In one embodiment, the battery unit 22 includes a housing 23 and the above-mentioned end cover assembly 25 . The housing 23 has an opening 23 a , and the cover 100 covers the opening 23 a .

In some embodiments of the present application, the housing 23 is a component used to cooperate with the cover 100 to form an internal environment of the battery cell 22 , wherein the formed internal environment can be used to accommodate the electrode assembly 24 , electrolyte, and other components. . The housing 23 and the cover 100 may be independent components, and an opening 23a may be provided on the housing 23. The cover 100 covers the opening 23a at the opening 23a to form the internal environment of the battery cell 22. Without limitation, the shell 23 and the cover 100 can also be integrated. Specifically, the shell 23 and the cover 100 can form a common connection surface before other components are inserted into the shell. When it is necessary to encapsulate the inside of the shell 23 At this time, the housing 23 and the cover 100 are closed again. The housing 23 can be of various shapes and sizes, such as rectangular parallelepiped, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 23 can be determined according to the specific shape and size of the electrode assembly 24 . The housing 23 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in the embodiment of the present application.

Please refer to FIG. 2 . In one embodiment, the battery 20 includes a box 21 and the above-mentioned battery cells 22 . The battery cells 22 are arranged in the box 21 . The above-mentioned battery 20 has high space utilization, and the box 21 can accommodate more or larger battery cells 22, which indirectly increases the capacity of the battery cells 22 in the box 21.

Please refer to FIG. 1 . In one embodiment, the electrical equipment includes the above-mentioned battery cell 22 , which is used to provide electric energy, or the above-mentioned battery 20 , which is used to supply energy to the electrical equipment. The above-mentioned electrical equipment has a high space utilization rate for the layout space within the electrical equipment, so as to accommodate more or larger battery cells 22 and obtain greater battery life.

According to some embodiments in this application, please refer to FIGS. 4 to 7 . In one embodiment, the end cap assembly 25 includes a cover 100 , a connector 200 , an electrode terminal 300 , a first insulating member 400 , and an insulating support member 500 . The second insulating member 600 and the sealing member 700. The cover 100 is provided with a first mounting hole 103. The first mounting hole 103 penetrates the outer end surface 100b and the inner end surface 100a of the cover 100 along the thickness direction of the cover 100. The connector 200 and The cover 100 is disposed on the outer end surface 100b of the cover 100 and is insulated from the cover. The electrode terminal 300 is disposed in the first mounting hole 103 and riveted to the connector 200 and the cover 100 respectively; the insulating support member 500 is sandwiched between A separation space is formed between the outer end surface 100b and the connector 200, and between the connector 200 and the cover 100. The first insulating member 400 is filled in the separation space and wrapped around the outer periphery of the connector 200, and in the thickness direction of the cover 100 On the top, the end of the first insulating member 400 away from the outer end surface 100b is not higher than the end of the electrode terminal 300 that penetrates the outer end surface 100b. The outer end surface 100b is provided with a first groove 101 for accommodating the first insulating member 400. The bottom wall of the first groove 101 is provided with an installation groove 102 for partially accommodating the insulating support member 500. The side walls of the insulating support member 500 are in contact with the installation. The side walls of the slot 102 are spaced apart. A second groove 104 is provided on the side of the cover 100 away from the connector 200 . The second insulating member 600 is partially accommodated in the second groove 104 . The sealing member 700 is provided between the main body 320 and the second insulating member 600 . .

The connecting piece 200 includes a first connecting section 210, an inclined section 220 and a second connecting section 230. The second connecting section 230 and the first connecting section 210 are respectively provided at both ends of the inclined section 220. The main body 320 extends out of the outer end surface 100b. One end of the first connecting section 210 is limitedly abutted on the side of the first connecting section 210 away from the outer end surface 100b. The second connecting section 230 is disposed on the outer end surface 100b and is insulated from the cover 100. The electrode terminal 300 includes a limiting portion 310 and a main body portion 320 fixed to the limiting portion 310. The limiting portion 310 is limited and contacts the inner end surface 100a. The main body portion 320 includes a connected first pole portion 321 and a second pole portion. 322. The first connecting section 210 is an annular structure provided with the second mounting hole 201. The first pole portion 321 is connected to the limiting portion 310 and penetrates the first mounting hole 103 and the second mounting hole 201. The first One end of the pole portion 321 protrudes from the second mounting hole 201 and is connected to the second pole portion 322 , and the second pole portion 322 is in limited contact with the side of the first connecting section 210 away from the outer end surface 100 b.

According to some embodiments in this application, please refer to Figure 3. In one embodiment, the battery cell 22 includes a housing 23 and the above-mentioned end cover assembly 25. The housing 23 has an opening 23a, and the cover 100 covers the opening 23a. .

According to some embodiments in this application, please refer to FIG. 2 . In one embodiment, the battery 20 includes a box 21 and the above-mentioned battery cell 22 . The battery cell 22 is disposed in the box 21 .

According to some embodiments in this application, please refer to Figure 1. In one embodiment, the electrical equipment includes the above-mentioned battery unit 22, which is used to provide electric energy, or includes the above-mentioned battery 20, which is used for Supply energy to electrical equipment. The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

An end cap assembly (25), including:

The cover (100) is provided with a first mounting hole (103), and the first mounting hole (103) penetrates the outer end surface (100b) of the cover (100) along the thickness direction of the cover (100). And an inner end surface (100a), the inner end surface (100a) is configured to face the accommodation cavity of the battery cell;

The connecting piece (200) is insulated from the cover (100) and is provided on the outer end surface (100b) of the cover (100);

The electrode terminal (300) is inserted through the first mounting hole (103), and is riveted and matched with the connecting piece (200) and the cover;

The first insulating member (400) is wrapped around the outer periphery of the connecting member (200), and in the thickness direction of the cover (100), the first insulating member (400) is away from the outer end surface (100b) ) is not higher than the end of the electrode terminal (300) that penetrates the outer end surface (100b).
The end cap assembly (25) according to claim 1, wherein the end cap assembly (25) further includes an insulating support member (500), the insulating support member (500) is sandwiched between the outer end surface (100b) ) and the connecting piece (200), a spacing space is formed between the connecting piece (200) and the cover (100), the first insulating member (400) is filled in the spacing space, and Wrapped around the outer periphery of the connecting piece (200).
The end cap assembly (25) according to claim 2, wherein the outer end surface (100b) is provided with a first groove (101) for accommodating the first insulating member (400), and the first groove The bottom wall of the slot (101) is provided with an installation slot (102) that partially accommodates the insulating support member (500). The side wall of the insulating support member (500) and the side wall of the installation slot (102) are There are gaps in between.
The end cap assembly (25) according to claim 3, wherein the mounting groove (102) is circular, and the insulating support member (500) is in the shape of a Mitsubishi column.
The end cap assembly (25) according to claim 3, wherein a limiting structure is provided on the inner wall of the first groove (101), and the limiting structure cooperates with the first insulating member (400). .
The end cap assembly (25) according to claim 2, wherein the insulating support member (500) has a solid columnar structure or a hollow annular structure.
The end cap assembly (25) of claim 1, wherein the first insulating member (400) is an injection molded structure.
The end cap assembly (25) according to claim 1, wherein the electrode terminal (300) includes a limiting portion (310) and a main body portion (320) fixed to the limiting portion (310), and the The limiting part (310) is limited and contacts the inner end face (100a), and the main body part (320) penetrates the first mounting hole (103) and extends out of the outer end face (100b). (320) One end protruding from the outer end surface (100b) is in limited contact with the connecting piece (200) to rivet and cooperate with the connecting piece (200) and the cover (100).
The end cap assembly (25) according to claim 8, wherein the connecting member (200) includes a first connecting section (210), an inclined section (220) and a second connecting section (230), and the second connecting section (230) The connecting section (230) and the first connecting section (210) are respectively provided at both ends of the inclined section (220), and the main body part (320) extends out of the limiting stop at one end of the outer end surface (100b). Connected to the side of the first connecting section (210) away from the outer end face (100b), the second connecting section (230) is provided on the outer end face (100b) and connected with the cover (100) ) phase insulation.
The end cap assembly (25) according to claim 9, wherein the first connecting section (210) is an annular structure provided with a second mounting hole (201), and the main body part (320) includes connected A first pole part (321) and a second pole part (322). The first pole part (321) is connected to the limiting part (310) and penetrates through the first mounting hole (103). ) and the second mounting hole (201), one end of the first pole portion (321) extending out of the second mounting hole (201) is connected to the second pole portion (322), and the The second pole portion (322) is in limited contact with a side of the first connecting section (210) away from the outer end surface (100b).
The end cover assembly (25) according to claim 1, wherein the end cover assembly (25) further includes a second insulating member (600), the second insulating member (600) is disposed on the cover body ( 100), one end of the electrode terminal (300) is riveted and matched with the connector (200), and the other end of the electrode terminal (300) passes through the second The insulating member (600) is in limited contact with the end surface of the second insulating member (600) facing away from the cover (100).
The end cover assembly (25) according to claim 11, wherein a second groove (104) is provided on a side of the cover (100) away from the connecting member (200), and the second insulating member The (600) portion is received in the second groove (104) and is in clearance fit with the side wall of the second groove (104).
The end cap assembly (25) according to claim 11, wherein the end cap assembly (25) further includes a seal (700), the seal (700) is provided on the main body (320) and the between the second insulating members (600).
A battery cell (22), including:

The housing (23) has an opening (23a);

The end cap assembly (25) according to any one of claims 1-13, wherein the cover body (100) covers the opening (23a).
A battery (20), including:

box(21);

The battery cell (22) according to claim 14 is arranged in the box (21).
An electrical device, which includes a battery unit (22) as claimed in claim 14, said battery unit (22) being used to provide electrical energy, or a battery (20) as claimed in claim 15, The battery (20) is used to provide electrical energy.