Conductive terminal, pole post assembly, cover plate, battery, battery pack, and power device

Abstract

The application relates to the technical field of batteries, in particular to a conductive terminal, a pole column assembly, a cover plate, a battery, a battery pack and an electric energy equipment. The conductive terminal is used in a pole column assembly and comprises an aluminum layer, a pole column hole and a connecting groove, the pole column hole is used for the pole column of the pole column assembly to pass through, and the connecting groove is arranged on the surface of the aluminum layer away from the pole column; a copper layer is arranged in the connecting groove, and the copper layer is used for welding with the pole column passing through the pole column hole; a composite layer is connected between the copper layer and the aluminum layer, and the composite layer is formed by compounding copper and aluminum. The pole column can be welded and connected with the copper layer after passing through the pole column hole, so that only a common copper pole column needs to be used, the resistance of the welding connection between the copper pole column and the copper layer is relatively small, and a special copper-aluminum composite pole column does not need to be used. The welding strength of the copper layer and the copper pole column is large, the connection stability of the pole column assembly is improved, and the safety performance of the battery is ensured.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a conductive terminal, electrode assembly, cover plate, battery, battery pack and power equipment. Background Technology

[0002] Currently, with the continuous development of new energy technologies, the requirements for battery packs are also constantly increasing. A battery contains cells within a casing, and the current from the cells is conducted through terminals on a cover plate.

[0003] To reduce the internal resistance of batteries, current technology typically uses copper-aluminum composite terminals connected to the aluminum layer. However, during use, there is a risk of the composite surface detaching from the battery. Once detached, the battery will experience an open circuit, rendering it unusable. Furthermore, if the composite surface detaches, the electrolyte in the battery will leak, potentially causing the battery pack to explode and catch fire. Utility Model Content

[0004] This application provides a conductive terminal, a terminal assembly, a cover plate, a battery, a battery pack, and a power device to improve the structural stability of the terminal assembly, thereby improving the safety performance of the battery.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] On one hand, this application provides a conductive terminal for use in a terminal assembly, comprising:

[0007] The aluminum layer has electrode holes and connecting grooves. The electrode holes are used for the electrode of the electrode assembly to pass through, and the connecting grooves are located on the surface of the aluminum layer away from the electrode.

[0008] A copper layer is provided in the connecting groove and is used to weld the electrode through the electrode hole.

[0009] A composite layer is formed between the copper layer and the aluminum layer, and the composite layer is composed of copper and aluminum.

[0010] In one possible implementation, along the axial direction of the electrode hole, a receiving groove is provided on the side of the conductive terminal away from the electrode, the receiving groove being used to receive the weld vein of the electrode being welded to the copper layer.

[0011] In one possible implementation, the receiving groove is formed on the side of the copper layer away from the aluminum layer.

[0012] In one possible implementation, the copper layer is further provided with through holes, which are connected to the receiving groove, and the through holes are used for the insertion of the pole post.

[0013] In one possible implementation, the copper layer is further provided with a riveting groove, which is located between the through hole and the receiving groove and is connected to both the through hole and the receiving groove. The riveting groove is used to rivet the pole of the through hole.

[0014] In one possible implementation, along the axial direction of the pole hole, the composite layer is located on the side of the riveting groove away from the receiving groove, and there is a gap between it and the bottom wall of the riveting groove.

[0015] In one possible implementation, the distance between the composite layer and the bottom wall of the riveting groove along the axial direction of the pole hole is H1, where H1 satisfies: H1≥0.3mm.

[0016] In one possible implementation, the receiving groove is formed by grooves formed on the side of the copper layer and aluminum layer away from the pole.

[0017] In one possible implementation, the conductive terminal is further provided with a riveting groove, which is located between the pole hole and the receiving groove and is connected to both the pole hole and the receiving groove. The riveting groove is used to rivet the pole that passes through the pole hole.

[0018] In one possible implementation, the riveting groove is formed by grooves in the copper layer and the aluminum layer on the side away from the pole.

[0019] In one possible implementation, the copper layer is located away from the bottom wall of the connection groove and below the surface of the aluminum layer where the connection groove is formed, so as to form a receiving groove between the copper layer and the aluminum layer.

[0020] In one possible implementation, two connecting grooves are provided, located on both sides of the aluminum layer along the length of the conductive terminal; or

[0021] Two connecting grooves are provided, along the width direction of the conductive terminal, and the connecting grooves are located on both sides of the aluminum layer.

[0022] In one possible implementation, the connecting groove is located in the middle of the aluminum layer along the width direction of the conductive terminal; or

[0023] Along the length of the conductive terminal, the connecting groove is located in the middle of the aluminum layer.

[0024] In one possible implementation, the thickness of the composite layer ranges from 250 μm to 750 μm.

[0025] In one possible implementation, the thickness of the copper layer is H2, and the total thickness of the conductive terminals is H3, where H2 and H3 satisfy: 0.2H3≤H2≤0.5H3.

[0026] In one possible implementation, the composite layer is formed through a semi-molten solid-liquid composite at the interface between the copper layer and the aluminum layer.

[0027] In one possible implementation, the composite layer is 100% metallurgically composited with copper and aluminum.

[0028] On the other hand, this application provides a pole assembly, including a pole and the aforementioned conductive terminal.

[0029] In one possible implementation, the electrode is a copper electrode.

[0030] In one possible implementation, a pre-drilled hole is provided at the end of the pole facing the conductive terminal, the pre-drilled hole being used for positioning the riveting tool.

[0031] On another aspect, this application provides a cover plate, including a cover plate body and the aforementioned pole assembly, wherein the cover plate body is provided with a first through hole and the pole is inserted through the first through hole.

[0032] In one possible implementation, a lead-out piece is also included, which is connected to the terminal post and located on the side of the cover plate body away from the conductive terminal.

[0033] In one possible implementation, the lead-out piece is provided with a second through hole, and the pole post passes through the second through hole.

[0034] In one possible implementation, a spacer ring is also included. The spacer ring is disposed on the cover plate body and has a third through hole. The pole post passes through the third through hole. The spacer ring is used to separate the lead-out piece from the cover plate body.

[0035] In one possible implementation, an insulating block is also included. The insulating block is disposed on the cover plate body and has a fourth through hole. The pole passes through the fourth through hole. The insulating block is used to separate the conductive terminal from the cover plate body.

[0036] In one possible implementation, a sealing ring is also included, which is fitted onto the pole and abuts against the insulating block. The sealing ring is used to cooperate with the insulating block to separate the pole from the cover plate body.

[0037] In one possible implementation, an explosion-proof valve is also included, which is located on the cover plate body.

[0038] In one possible implementation, an explosion-proof valve protection plate is also included, which is placed over the explosion-proof valve.

[0039] On another note, this application provides a battery, including a casing, a battery cell, and the aforementioned cover plate, wherein the battery cell is disposed in the casing and the cover plate covers the casing.

[0040] In another aspect, this application provides a battery pack including the aforementioned battery.

[0041] In another aspect, this application provides an electrical power device, including the aforementioned battery or the aforementioned battery pack.

[0042] This application provides conductive terminals, terminal assembly, cover plate, battery, battery pack, and power equipment. By creating a connecting groove in an aluminum layer, a copper layer is placed within the connecting groove. The copper layer and aluminum layer are connected by a copper-aluminum composite layer. Terminal holes are provided in the aluminum layer for the terminal to pass through. The terminal can pass through the terminal holes and be welded to the copper layer. Therefore, only ordinary copper terminals are needed. The welding resistance between the copper terminal and the copper layer is relatively low, eliminating the need for special copper-aluminum composite terminals. The welding strength between the copper layer and the copper terminal is high, improving the connection stability of the terminal assembly and ensuring the battery's safety performance. Attached Figure Description

[0043] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is one of the structural schematic diagrams of the cover plate provided in the embodiments of this application;

[0045] Figure 2 for Figure 1 A partially exploded structural diagram of the cover plate shown.

[0046] Figure 3 for Figure 1 The cover plate shown is a cross-sectional view along AA;

[0047] Figure 4 for Figure 3 An enlarged structural diagram of part B of the cover plate shown;

[0048] Figure 5 for Figure 1 The cover plate shown is a cross-sectional view along CC.

[0049] Figure 6 This is a second schematic diagram of the structure of the cover plate provided in the embodiments of this application;

[0050] Figure 7 for Figure 6 A structural schematic diagram of the cover plate from another perspective;

[0051] Figure 8 for Figure 7 The cover plate shown is a cross-sectional view along DD;

[0052] Figure 9 This is the third schematic diagram of the structure of the conductive terminals of the cover plate provided in the embodiments of this application;

[0053] Figure 10Fourth schematic diagram of the cover plate provided in the embodiments of this application;

[0054] Figure 11 Fifth schematic diagram of the structure of the cover plate provided in the embodiments of this application;

[0055] Figure 12 This is the sixth schematic diagram of the structure of the cover plate provided in the embodiments of this application;

[0056] Figure 13 This is a schematic diagram of the battery structure provided in an embodiment of this application.

[0057] Explanation of reference numerals in the attached figures:

[0058] 100-Terminal assembly; 10-Conductive terminal; 101-Receiving groove; 102-Riveting groove; 11-Aluminum layer; 111-Terminal hole; 112-Connecting groove; 12-Copper layer; 121-Through hole; 13-Composite layer; 20-Terminal; 21-Pre-made hole; 200-Cover plate; 201-Cover plate body; 202-First through hole; 203-Lead-out piece; 204-Second through hole; 205-Spacer ring; 206-Third through hole; 207-Insulating block; 208-Fourth through hole; 209-Sealing ring; 210-Explosion-proof valve; 211-Explosion-proof valve protection piece; 300-Battery; 301-Housing. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0060] Currently, with the continuous development of new energy technologies, the requirements for battery packs are also constantly increasing. A battery contains cells within a casing, and the current from the cells is conducted through terminals on a cover plate.

[0061] To reduce the internal resistance of batteries, current technology typically uses copper-aluminum composite terminals connected to the aluminum layer. However, during use, there is a risk of the composite surface detaching from the battery. Once detached, the battery will experience an open circuit, rendering it unusable. Furthermore, if the composite surface detaches, the electrolyte in the battery will leak, potentially causing the battery pack to explode and catch fire.

[0062] In order to overcome the shortcomings of the existing technology, after repeated thinking and verification, the inventors discovered that if the aluminum layer is set as the conductive terminal and a semi-molten solid-liquid composite method is used at the copper-aluminum interface, the composite layer material simultaneously contains the first matrix copper and the second matrix aluminum, and its thickness can be effectively controlled. The content of brittle compounds in the intermediate layer is low, which ensures the strength and electrical performance of the battery's conductive terminal and improves the safety and reliability of the battery.

[0063] In view of this, this application provides a conductive terminal for use in a terminal assembly, comprising:

[0064] The aluminum layer has electrode holes and connecting grooves. The electrode holes are used for the electrode of the electrode assembly to pass through, and the connecting grooves are located on the surface of the aluminum layer away from the electrode.

[0065] A copper layer is provided in the connecting groove and is used to weld the electrode through the electrode hole.

[0066] A composite layer is formed between the copper layer and the aluminum layer, and the composite layer is composed of copper and aluminum.

[0067] By creating connecting grooves in the aluminum layer, a copper layer is placed within these grooves. The copper and aluminum layers are connected by a copper-aluminum composite layer. A terminal hole is provided in the aluminum layer for the terminal to pass through. The terminal passes through the terminal hole and is then welded to the copper layer. Therefore, only ordinary copper terminals are needed. The welding resistance between the copper terminal and the copper layer is relatively low, eliminating the need for special copper-aluminum composite terminals. The high welding strength between the copper layer and the copper terminal improves the connection stability of the terminal assembly and ensures the battery's safety performance.

[0068] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0069] The specific structure of the conductive terminals and various possible implementation methods are described in detail below.

[0070] Figure 1 This is one of the structural schematic diagrams of the cover plate provided in the embodiments of this application. Figure 2 for Figure 1 A partial exploded view of the cover plate is shown. Figure 3 for Figure 1 The cover plate shown is a cross-sectional view along AA. Figure 4 for Figure 3 An enlarged structural diagram of part B of the cover plate shown. Figure 5 for Figure 1 The cover plate shown is a cross-sectional view along CC. Figure 6 This is a second schematic diagram of the cover plate provided in an embodiment of this application. Figure 7 for Figure 6 A structural schematic diagram of the cover plate from another perspective. Figure 8for Figure 7 The cover plate shown is a cross-sectional view along DD. Figure 9 This is the third schematic diagram of the structure of the conductive terminals of the cover plate provided in the embodiments of this application. Figure 10 The fourth schematic diagram of the cover plate provided in the embodiments of this application. Figure 11 The fifth schematic diagram of the cover plate provided in the embodiments of this application. Figure 12 This is the sixth schematic diagram of the cover plate provided in the embodiments of this application. Figure 13 This is a schematic diagram of the battery structure provided in an embodiment of this application.

[0071] like Figure 1 and Figure 2 As shown in the embodiment of this application, the conductive terminal 10 is used on the terminal assembly 100. The terminal assembly 100 is used on the cover plate 200 to connect the inside and outside of the battery.

[0072] like Figure 3 and Figure 4 As shown, the conductive terminal 10 includes an aluminum layer 11, a copper layer 12, and a composite layer 13. The aluminum layer 11 has a terminal hole 111 and a connecting groove 112. The terminal hole 111 is for the terminal 20 to pass through, and the connecting groove 112 is located on the surface of the aluminum layer 11 opposite to the terminal 20. The copper layer 12 is located in the connecting groove 112 and is used for welding to the terminal 20 passing through the terminal hole 111. The composite layer 13 connects the copper layer 12 and the aluminum layer 11, and is formed by combining copper and aluminum.

[0073] In one possible implementation, the composite layer 13 is formed by a metallurgical composite of copper and aluminum.

[0074] Metallurgical composites are a technology used to manufacture composite materials. By combining the advantages of different materials, superior physical, chemical, and mechanical properties can be achieved. The metallurgical composite process typically involves joining two or more different metals or alloys to form a composite material with specific properties. Composite materials manufactured through metallurgical composite processes offer excellent properties such as lightweight, high strength, corrosion resistance, and high-temperature resistance, and are therefore commonly used in industries such as aerospace, automotive, electronics, and construction.

[0075] Metallurgical composite processes can be achieved through a variety of methods, including powder metallurgy, hot pressing sintering, explosive welding, fusion casting composites, and mechanical alloying. The choice of these methods typically depends on the required material properties, the application area, and economic considerations. For example, powder metallurgy is suitable for manufacturing complex-shaped and high-performance metal parts, while explosive welding is often used to manufacture bimetallic sheets requiring high-strength bonding.

[0076] By setting a connecting groove 112 on the aluminum layer 11, the copper layer 12 is placed in the connecting groove 112. The copper layer 12 and the aluminum layer 11 are connected by a copper-aluminum metallurgical composite layer 13. The metallurgical composite layer 13 between copper and aluminum provides a good interface bond, overcoming the electrochemical corrosion problem that may occur when copper and aluminum are directly connected. A terminal hole 111 is set in the aluminum layer 11 for the insertion of the terminal 20. The terminal 20 can pass through the terminal hole 111 and be welded to the copper layer 12. Therefore, only ordinary copper terminals are needed. The welding resistance between the copper terminal and the copper layer 12 is relatively low, eliminating the need for special copper-aluminum composite terminals, reducing material costs, and simplifying the manufacturing process. The welding strength between the copper layer 12 and the copper terminal is high, improving the connection stability of the terminal assembly 100 and reducing the risk of connection failure due to vibration or mechanical stress, thus ensuring the safety performance of the battery 300.

[0077] In one possible implementation, along the axial direction of the electrode hole 111, the conductive terminal 10 is provided with a receiving groove 101 on the side away from the electrode 20, the receiving groove 101 being used to receive the weld vein of the electrode 20 being welded to the copper layer 12.

[0078] The receiving groove 101 is designed to accommodate the weld veins after the pole post 20 is welded to the copper layer 12, preventing the weld veins from protruding above the upper surface of the aluminum layer 11 and affecting subsequent welding. This ensures a smooth weld, reduces the cleaning and shaping work required after welding, and thus does not affect subsequent welding with the connecting piece. The weld veins, contained within the receiving groove 101, form a more robust mechanical bond, enhancing the tensile and shear strength of the weld joint and improving the overall structural durability.

[0079] Please also refer to Figure 5 In one possible implementation, the receiving groove 101 is formed on the side of the copper layer 12 away from the aluminum layer 11.

[0080] Providing a receiving groove 101 on one side of the copper layer 12 simplifies the manufacturing process, reduces the processing requirements of the aluminum layer 11, and thus reduces production complexity and cost. The receiving groove 101 provides additional space on the copper layer 12 side to absorb welding stress, reducing the transmission of welding stress to the aluminum layer 11 and enhancing the structural stability of the entire assembly. Providing a receiving groove 101 on the copper layer 12 side also isolates the welding heat source from the aluminum layer 11, reducing the thermal impact of the welding process on the aluminum layer 11 and lowering the risk of deformation or performance degradation of the aluminum layer 11.

[0081] In one possible implementation, the connecting groove 112 is interconnected with the pole hole 111, and the copper layer 12 is also provided with a through hole 121, which is interconnected with the receiving groove 101. The through hole 121 is used for the through hole 20.

[0082] The interconnected design of the connecting groove 112 and the electrode hole 111 allows the electrode 20 to pass more easily through the copper layer 12 and the aluminum layer 11, simplifying the assembly process and improving production efficiency. This design ensures direct contact between the electrode 20 and the copper layer 12, optimizing the current transmission path, reducing resistance, and improving conductivity. By providing a continuous channel, the electrode 20 can form a more robust mechanical bond between the copper layer 12 and the aluminum layer 11, enhancing the overall structural strength and durability. This design makes the welding area and the condition of the electrode 20 easier to inspect and maintain, facilitating the timely detection and resolution of potential problems.

[0083] In one possible implementation, the conductive terminal 10 is further provided with a riveting groove 102, which is used to rivet the pole 20 that passes through the pole hole 111.

[0084] The riveting groove 102 provides a dedicated area for riveting the pole post 20, accommodating the riveted pole post 20. Riveting can form a strong mechanical connection, further improving the bonding strength between the pole post 20 and the conductive terminal 10.

[0085] The design of the riveting groove 102 ensures the fixed position of the pole 20 within the conductive terminal 10, reducing loosening or displacement caused by vibration or external forces and improving the long-term stability of the connection. The presence of the riveting groove 102 helps disperse mechanical stress, reducing the potential damage to the conductive terminal 10 and pole 20 caused by stress concentration, thus extending the service life of the assembly. The tight mechanical connection achieved through riveting ensures good electrical contact, further reducing resistance and improving conductivity. The design of the riveting groove 102 can protect the welding area to a certain extent, reducing the direct impact of the external environment on the welding point, such as mechanical impact or corrosion. The structure of the riveting groove 102 makes the fixed state of the pole 20 easier to inspect and maintain, facilitating the timely detection and resolution of potential problems. The design of the riveting groove 102 provides additional mechanical fixing functions without increasing the overall size of the assembly, optimizing the internal space utilization of the assembly.

[0086] In one possible implementation, the riveting groove 102 is provided on the copper layer 12, and the riveting groove 102 is located between the through hole 121 and the receiving groove 101, and communicates with the through hole 121 and the receiving groove 101. The riveting groove 102 is used to rivet the pole post 20 that passes through the through hole 121.

[0087] By integrating the riveting groove 102 into the copper layer 12, riveting operations can be performed more conveniently during assembly, reducing the need for additional clamps or fixing devices and improving production efficiency. The riveting groove 102 provides a dedicated area for riveting the pole post 20, which forms a strong mechanical connection and further improves the bonding strength between the pole post 20 and the copper layer 12.

[0088] In one possible implementation, along the axial direction of the pole hole 111, the composite layer 13 is located on the side of the riveting groove 102 away from the receiving groove 101, and is spaced apart from the bottom wall of the riveting groove 102. That is, the composite layer 13 is located below the step of the riveting groove 102.

[0089] The composite layer 13 is far from the welding position of the electrode post 20 and the copper layer 12, and there is no direct connection between the two. The composite surface is not affected by the welding heat, which makes the battery cover plate stronger, more thermally stable and safer.

[0090] The gap between the composite layer 13 and the bottom wall of the riveting groove 102 provides thermal insulation, reducing the direct impact of the heat generated during the riveting process on the composite layer 13 and protecting the integrity and performance of the composite layer 13.

[0091] Furthermore, the copper layer 12 between the riveting groove 102 and the composite layer 13 blocks the welding laser, so that the composite layer 13 is not affected by the welding heat when the electrode post 20 is welded to the copper layer 12, and the laser is prevented from directly acting on the composite layer 13, thus ensuring the strength performance of the composite layer 13 and improving the safety performance of the battery.

[0092] Meanwhile, the spacing design can prevent mechanical stress or deformation that may be caused to the composite layer 13 during the riveting process, maintain the structural stability of the composite layer 13, ensure its best performance in electrical conductivity and mechanical properties, and avoid performance degradation caused by riveting stress.

[0093] In one possible implementation, the distance between the composite layer 13 and the bottom wall of the riveting groove 102 along the axial direction of the pole hole 111 is H1, where H1 satisfies: H1≥0.3mm.

[0094] Setting an interval of H1≥0.3mm provides sufficient thermal isolation space, further reducing the impact of heat generated during welding on composite layer 13 and protecting its metallurgical bonding properties.

[0095] Please see Figure 6 In one possible implementation, the receiving groove 101 is formed by a groove formed on the side of the copper layer 12 and the aluminum layer 11 away from the pole post 20.

[0096] The copper layer 12 and aluminum layer 11 together form the receiving groove 101, providing a more robust structure and enhancing overall mechanical strength and durability. This design provides a larger space to accommodate welding material, making the welding process easier to control and ensuring that the welding material fully fills the joint area, thus improving weld quality. By creating grooves in the copper layer 12 and aluminum layer 11, the size and shape of the receiving groove 101 can be adjusted more flexibly to adapt to different design requirements and manufacturing processes.

[0097] In one possible implementation, the conductive terminal 10 is further provided with a riveting groove 102, which is located between the pole hole 111 and the receiving groove 101 and communicates with the pole hole 111 and the receiving groove 101. The riveting groove 102 is used to rivet the pole 20 that passes through the pole hole 111.

[0098] By integrating the riveting groove 102 into the conductive terminal 10, riveting operations can be performed more conveniently during assembly, reducing the need for additional clamps or fixing devices and improving production efficiency. By rationally designing the position and shape of the riveting groove 102, the internal space of the conductive terminal 10 can be effectively utilized, optimizing the overall structural layout.

[0099] Please also refer to Figure 7 and Figure 8 In one possible implementation, the riveting groove 102 is formed by grooves formed on the side of the copper layer 12 and the aluminum layer 11 away from the pole post 20.

[0100] The riveting groove 102, formed by the copper layer 12 and the aluminum layer 11, provides more robust structural support, enhancing overall mechanical strength and durability. This design ensures the structural integrity of the riveting groove 102, allowing the pole post 20 to be more reliably fixed during riveting, reducing the risk of loosening and displacement. By creating grooves in the copper layer 12 and the aluminum layer 11, the size and shape of the riveting groove 102 can be adjusted more flexibly to adapt to different design requirements and manufacturing processes. Through the rational design of the position and shape of the riveting groove 102, the internal space of the conductive terminal 10 can be effectively utilized, optimizing the overall structural layout.

[0101] Please see Figure 9 In one possible implementation, the copper layer 12 is located away from the bottom wall of the connecting groove 112 and below the surface of the aluminum layer 11 where the connecting groove 112 is formed, so as to form a receiving groove 101 between the copper layer 12 and the aluminum layer 11.

[0102] By forming a receiving groove 101 between the copper layer 12 and the aluminum layer 11, additional space is provided to accommodate welding material, ensuring that the solder can fully fill the connection area, thereby improving the quality and reliability of the weld. The receiving groove 101 provides a clearly defined area for welding operations, which can simplify the welding and assembly process and reduce the need for precise control of the welding position.

[0103] Meanwhile, the recessed design of the copper layer 12 reduces the direct impact of welding heat on the aluminum layer 11, protecting the structural integrity and performance of the aluminum layer 11 and preventing deformation or damage caused by overheating. It also saves on the amount of copper used.

[0104] Please see Figure 10 and Figure 11In one possible implementation, two connecting grooves 112 are provided, located on both sides of the aluminum layer 11 along the length of the conductive terminal 10. The copper layer 12 is disposed in the corresponding connecting groove 112.

[0105] Please see Figure 6 In one possible implementation, two connecting grooves 112 are provided, along the width direction of the conductive terminal 10, and the connecting grooves 112 are provided on both sides of the aluminum layer 11. The copper layer 12 is provided in the corresponding connecting groove 112.

[0106] like Figure 6 and Figure 7 As shown, the connecting groove 112 and the copper layer 12 can extend along the length of the aluminum layer 11. For battery structures with low requirements for overcurrent performance or large terminals 20, the copper layer 12 of the conductive terminal 10 can be designed on both sides of the terminal 20. After riveting, the terminal 20 and the copper layer 12 are attached and welded on the upper and lower sides of the width direction in the middle position, while the terminal 20 and the aluminum layer 11 are attached and riveted on the left and right sides of the length direction in the middle position. This balances electrical performance and strength, and improves the safety performance of the battery.

[0107] Depending on the specific application requirements, the connecting groove 112 can be set along the length or width direction, providing greater design flexibility to adapt to different equipment and installation conditions. For example, the composite shape of the conductive terminal 10 can be adjusted according to the welding position and area of ​​the battery pack. The electrode post 20 can be welded and riveted in the area of ​​the connecting groove 112, and the subsequent connecting pieces can be welded in other areas. Different composite shapes can also be designed, such as irregular composite shapes, etc., not limited to the two mentioned above.

[0108] Connecting grooves 112 are provided on both sides of the aluminum layer 11, providing more uniform mechanical support along both the length and width directions, thus enhancing the stability and durability of the overall structure. The design of two connecting grooves 112 optimizes the current distribution path, reduces resistance, improves conductivity, and ensures uniform current transmission in the conductive terminals. Simultaneously, by providing connecting grooves 112 on both sides, heat can be more effectively dispersed and managed, reducing the risk of localized overheating and protecting the thermal stability of the component.

[0109] The dual connection slot 112 provides redundant connection paths, so that even if one connection point fails, the other connection point can still maintain the integrity of the electrical and mechanical connection, thus improving the reliability of the system.

[0110] Please see Figure 12 In one possible implementation, a connecting groove 112 is provided in the middle of the aluminum layer 11 along the width direction of the conductive terminal 10.

[0111] In one possible implementation, a connecting groove 112 is provided in the middle of the aluminum layer 11 along the length direction of the conductive terminal 10.

[0112] Placing the connecting groove 112 in the center helps to evenly distribute mechanical stress, reducing the potential damage to the aluminum layer 11 and copper layer 12 caused by stress concentration, and extending the service life of the component. The centrally located connecting groove 112 provides a symmetrical current path, ensuring uniform current distribution in the conductive terminals 10, reducing resistance, and improving conductivity. The centrally located connecting groove 112 provides symmetrical mechanical support, enhancing the stability and durability of the overall structure and reducing deformation or warping caused by asymmetrical design.

[0113] In one possible implementation, the thickness of the composite layer 13 ranges from 250 μm to 750 μm.

[0114] The moderate thickness range allows composite layer 13 to support various functional requirements, such as electrical connectivity, mechanical support, and thermal management, meeting the needs of different application scenarios. The thickness of composite layer 13, between 250 μm and 750 μm, ensures good conductivity; sufficient thickness helps reduce resistance and improve current transmission efficiency. Furthermore, the 250 μm to 750 μm thickness range provides sufficient mechanical strength to withstand mechanical stress and external impacts, reducing the risk of deformation or damage. The moderate thickness also facilitates effective heat dissipation. Composite layer 13 can better conduct and disperse heat, reducing the risk of localized overheating and protecting the thermal stability of the component. Within the 250 μm to 750 μm range, the amount of material used is optimized, providing the necessary performance while controlling material costs, thus improving economic efficiency.

[0115] In one possible implementation, the thickness of the copper layer 12 is H2, and the total thickness of the conductive terminal 10 is H3, where H2 and H3 satisfy: 0.2H3≤H2≤0.5H3.

[0116] Copper possesses excellent electrical conductivity. Ensuring that the thickness of the copper layer 12 is between 20% and 50% of the total thickness provides sufficient conductive paths, reduces resistance, and improves current transmission efficiency. The appropriate thickness of the copper layer 12 provides necessary mechanical support, enhancing the overall strength and durability of the conductive terminal 10, enabling it to withstand mechanical stress and external impacts. Copper's good thermal conductivity contributes to effective heat dissipation. Through an appropriate thickness ratio, the copper layer 12 can better conduct and disperse heat, reducing the risk of localized overheating and protecting the thermal stability of the component.

[0117] The thickness of the copper layer 12 is between 20% and 50% of the total thickness. The amount of copper used is optimized, which provides the necessary performance while controlling material costs and improving economic efficiency.

[0118] In one possible implementation, the composite layer 13 is formed by a semi-molten solid-liquid composite at the contact interface between the copper layer 12 and the aluminum layer 11.

[0119] The composite layer 13, without the introduction of a third base metal, has a lower cost. The semi-molten solid-liquid composite formation process enables a stronger metallurgical bond between the copper layer 12 and the aluminum layer 11, with a lower content of brittle compounds in the intermediate layer, improving interfacial bonding strength and reducing the risk of delamination or peeling. The thickness of the semi-molten solid-liquid composite layer 13 can be effectively controlled, ensuring the strength of the conductive terminal 10 and improving safety performance. By achieving a good interfacial bond, current can pass more smoothly through the interface between the copper layer 12 and the aluminum layer 11, reducing interfacial resistance and improving conductivity. The semi-molten bond helps form a continuous heat conduction path, enhancing the efficiency of heat transfer from the copper layer 12 to the aluminum layer 11 and improving overall thermal management performance. This bonding method enhances the overall mechanical strength of the composite layer 13, enabling it to better withstand mechanical stress and external impacts. The semi-molten solid-liquid composite formation effectively reduces voids and defects at the interface, lowering the risk of performance degradation due to incomplete interfaces. By enhancing interfacial bonding, the composite layer 13 exhibits higher durability and reliability in long-term use, reducing performance degradation caused by environmental factors. Meanwhile, the semi-molten solid-liquid composite bonding method allows for uniform interfacial bonding in complex shapes and designs, providing greater design flexibility. The semi-molten bonding process can better adapt to the different physical properties of copper and aluminum, reducing interfacial stress caused by differences in thermal expansion coefficients.

[0120] In one possible implementation, the copper and aluminum in the composite layer 13 are 100% metallurgically composited, that is, the composite rate of copper and aluminum is 100%.

[0121] 100% metallurgical bonding ensures a strong metallurgical bond between copper and aluminum, significantly enhancing the interfacial bonding strength and reducing the risk of delamination or peeling. Complete metallurgical bonding eliminates interfacial resistance, improves current transmission efficiency, and ensures excellent conductivity of the conductive terminal 10. This bonding method enhances the overall mechanical strength of the composite layer 13, enabling it to better withstand mechanical stress and external impacts. Achieving 100% metallurgical bonding effectively eliminates voids and defects at the interface, reducing the risk of performance degradation due to incomplete interfaces. Complete metallurgical bonding improves the durability and long-term reliability of the composite layer 13, reducing performance degradation caused by environmental factors.

[0122] The conductive terminal 10 provided in this embodiment includes an aluminum layer 11, a copper layer 12, and a composite layer 13. The aluminum layer 11 has a terminal hole 111 and a connecting groove 112. The terminal hole 111 is used for the terminal 20 of the terminal assembly 100 to pass through. The connecting groove 112 is provided on the surface of the aluminum layer 11 away from the terminal 20. The copper layer 12 is provided in the connecting groove 112 and is used to weld the terminal 20 that passes through the terminal hole 111. The composite layer 13 is connected between the copper layer 12 and the aluminum layer 11. The composite layer 13 is formed by metallurgically combining copper and aluminum.

[0123] By setting a connecting groove 112 on the aluminum layer 11, the copper layer 12 is placed in the connecting groove 112. The copper layer 12 and the aluminum layer 11 are connected by a copper-aluminum metallurgical composite layer 13. The metallurgical composite layer 13 between copper and aluminum provides a good interface bond, overcoming the electrochemical corrosion problem that may occur when copper and aluminum are directly connected. A terminal hole 111 is set in the aluminum layer 11 for the insertion of the terminal 20. The terminal 20 can pass through the terminal hole 111 and be welded to the copper layer 12. Therefore, only ordinary copper terminals are needed. The welding resistance between the copper terminal and the copper layer 12 is relatively low, eliminating the need for special copper-aluminum composite terminals, reducing material costs, and simplifying the manufacturing process. The welding strength between the copper layer 12 and the copper terminal is high, improving the connection stability of the terminal assembly 100 and reducing the risk of connection failure due to vibration or mechanical stress, thus ensuring the safety performance of the battery 300.

[0124] This application embodiment also provides a terminal assembly 100 for use in a cover plate 200. The terminal assembly 100 includes a terminal 20 and the aforementioned conductive terminal 10.

[0125] Given that the pole assembly 100 in this embodiment includes the conductive terminal 10 described in any of the above embodiments, the structure and beneficial effects of the conductive terminal 10 in the pole assembly 100 will not be described in detail here.

[0126] In one possible implementation, pole 20 is a copper pole.

[0127] The copper terminals and copper layer 12 provide a stable and reliable electrical connection, making them suitable for batteries and electronic devices requiring high efficiency and reliability. Copper has extremely low resistivity and is an excellent conductor. Using copper terminals can significantly improve current transmission efficiency and reduce energy loss.

[0128] In one possible implementation, the end of the pole post 20 facing the conductive terminal 10 is provided with a pre-drilled hole 21, which is used for positioning the riveting tool.

[0129] The pre-drilled hole 21 provides a clear positioning point for the riveting tool, ensuring precise alignment during the riveting process and improving assembly accuracy and consistency. By providing a clear pre-drilled hole 21, the need for position adjustments during riveting is reduced, simplifying the operation and improving production efficiency. It helps prevent the pole post 20 from shifting or tilting during riveting, reducing rework or quality problems caused by errors. The clear pre-drilled hole 21 design is suitable for automated assembly systems, facilitating automated production and improving the automation level of the production line.

[0130] This application embodiment also provides a cover plate 200, including the above-described pole assembly 100.

[0131] In one possible implementation, the cover plate 200 further includes a cover plate body 201, which has a first through hole 202 through which the pole post 20 passes.

[0132] The cover body 201 provides physical protection for internal components, preventing the effects of external environmental factors such as dust, moisture, and mechanical damage, thereby improving the system's durability and reliability. The first through-hole 202 provides a fixed and supported structure for the pole post 20, enhancing its mechanical stability and reducing the risk of displacement or loosening under vibration or impact conditions. The design of the first through-hole 202 serves as a positioning guide during assembly, making the installation of the pole post 20 more precise and convenient, improving production efficiency. By allowing the pole post 20 to pass through the first through-hole 202 of the cover body 201, the extension and integration of electrical connections can be achieved, ensuring efficient current transmission.

[0133] In one possible implementation, the cover plate body 201 can be made of a metal material with good electrical conductivity, such as aluminum or steel, and can be manufactured through processes such as stamping and machining.

[0134] In one possible implementation, the cover plate 200 further includes a lead-out piece 203, which is connected to the terminal post 20 and is located on the side of the cover plate body 201 opposite to the conductive terminal 10.

[0135] The lead-out tab 203 provides an efficient electrical connection path, allowing current to be transferred from the cell to the terminal 20, improving electrical performance and transmission efficiency. The position and shape of the lead-out tab 203 can be designed and adjusted according to specific application requirements, providing greater circuit design flexibility to adapt to different connection requirements. By integrating the lead-out tab 203 into the cover plate 200 design, the number of external connectors can be reduced, improving product integration and compactness.

[0136] In one possible implementation, the lead-out piece 203 is provided with a second through hole 204, and the pole post 20 passes through the second through hole 204.

[0137] By passing the pole post 20 through the second through hole 204 on the lead-out piece 203, the lead-out piece 203 can be quickly assembled with the pole post 20, which facilitates subsequent welding connection.

[0138] In one possible implementation, the cover plate 200 further includes a spacer 205, which is disposed on the cover plate body 201. The spacer 205 has a third through hole 206 through which the pole post 20 passes. The spacer 205 is used to separate the lead-out piece 203 from the cover plate body 201.

[0139] By separating the lead-out tab 203 from the cover plate body 201, the spacer 205 simplifies the assembly process, ensures that components do not interfere with each other during assembly, and improves assembly efficiency. The spacer 205 provides electrical insulation, preventing short circuits or unnecessary electrical contact between the lead-out tab 203 and the cover plate body 201, thus improving system safety and reliability. The spacer 205 provides additional mechanical protection for the lead-out tab 203, preventing physical damage or the effects of the external environment on the lead-out tab 203, and enhancing its durability.

[0140] The spacer 205 can act as a buffer, absorbing vibration and impact, reducing mechanical stress on the lead-out piece 203 and the pole piece 20, and improving the stability of the overall structure.

[0141] In one possible implementation, the spacer 205 is made of an insulating material, such as PP or PPS, which are insoluble in electrolyte, and serves as an insulating material.

[0142] In one possible implementation, the cover plate 200 further includes an insulating block 207, which is disposed on the cover plate body 201. The insulating block 207 has a fourth through hole 208, through which the pole post 20 passes. The insulating block 207 is used to separate the conductive terminal 10 from the cover plate body 201.

[0143] Insulating block 207 provides electrical insulation, preventing electrical contact between conductive terminal 10 and cover body 201, avoiding short circuits and leakage, and improving system safety and reliability. By separating conductive terminal 10 from cover body 201, insulating block 207 prevents direct contact between dissimilar metals, reducing the risk of electrochemical corrosion and extending component lifespan. Insulating block 207 provides thermal insulation, preventing heat conduction from conductive terminal 10 to cover body 201, helping to manage heat distribution and improving system thermal performance. Insulating block 207 provides additional mechanical protection for conductive terminal 10, preventing physical damage or external environmental influences and enhancing durability. Insulating block 207 also acts as a buffer, absorbing vibration and shock, reducing mechanical stress on conductive terminal 10 and cover body 201, and improving overall structural stability.

[0144] In one possible implementation, the cover plate 200 further includes a sealing ring 209, which is sleeved on the pole post 20 and abuts against the insulating block 207. The sealing ring 209 is used to cooperate with the insulating block 207 to separate the pole post 20 from the cover plate body 201.

[0145] The sealing ring 209 provides an effective seal, preventing liquids, dust, and other contaminants from entering the equipment, protecting internal components, and improving the system's protective performance. The sealing ring 209, in conjunction with the insulating block 207, further enhances electrical insulation, preventing electrical contact between the pole 20 and the cover plate body 201, avoiding short circuits and leakage, and improving safety. By isolating the pole 20 and the cover plate body 201, the sealing ring 209 reduces the corrosive effects of environmental factors on the metal, extending the component's service life. The sealing ring 209 has a certain degree of elasticity, absorbing mechanical vibration and impact, reducing mechanical stress on the pole 20 and other components, and improving structural stability. The sealing ring 209 also provides a degree of thermal insulation, preventing heat conduction from the pole 20 to the cover plate body 201, helping to manage heat distribution and improving the system's thermal performance.

[0146] In one possible implementation, the cover plate 200 also includes an explosion-proof valve 210, which is disposed on the cover plate body 201.

[0147] The main function of the explosion-proof valve 210 is to release excessive internal pressure, thereby preventing the battery from exploding or rupturing under abnormal conditions (such as overcharging, overheating or internal short circuit), and significantly improving the safety of the system.

[0148] In one possible implementation, the explosion-proof valve 210 is made of alloy materials such as pure aluminum or stainless steel.

[0149] In one possible implementation, the cover plate 200 also includes an explosion-proof valve protection plate 211, which covers the explosion-proof valve 210.

[0150] The explosion-proof valve protective plate 211 can protect the explosion-proof valve 210 from external physical damage, such as impact, scratch or other mechanical stress, thereby extending the service life of the explosion-proof valve 210.

[0151] In one possible implementation, the explosion-proof valve protection plate 211 is made of PET or other plastic materials.

[0152] The installation sequence of the cover plate 200 in this embodiment is as follows: After the pole post 20 is inserted into the second through hole 204 of the lead-out piece 203, the two are welded together. Then, the sealing ring 209, spacer 205, cover plate body 201, insulating block 207, and conductive terminal 10 are installed into the pole post 20 in sequence. The components are assembled into one piece by riveting. The top of the pole post 20 is welded to the copper layer 12 on the conductive terminal 10 to obtain the finished cover plate.

[0153] Please see Figure 13 This application embodiment also provides a battery 300, including a housing 301, a battery cell and the aforementioned cover plate 200, wherein the battery cell is disposed in the housing 301 and the cover plate 200 covers the housing 301.

[0154] The cover plate 200 can be either a positive electrode cover plate or a negative electrode cover plate.

[0155] This application embodiment also provides a battery pack, including the battery 300 described above.

[0156] In addition, this application embodiment also provides an electrical power device, including the battery 300 described above, or the battery pack described above.

[0157] The electrical equipment also includes electrical devices. Battery 300, or the aforementioned battery pack, is used to provide electrical power to the electrical devices.

[0158] The electrical equipment in this application embodiment can be a vehicle, for example: the vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0159] In addition, electrical equipment can also power other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships and spacecraft, among which spacecraft can include airplanes, rockets, space shuttles or spacecraft.

[0160] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0161] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0162] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0163] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A conductive terminal for use in a terminal assembly (100), characterized in that, include: The aluminum layer (11) is provided with a pole hole (111) and a connecting groove (112). The pole hole (111) is used for the pole (20) of the pole assembly (100) to pass through. The connecting groove (112) is provided on the surface of the aluminum layer (11) away from the pole (20). A copper layer (12) is disposed in the connecting groove (112) and is used to weld to the pole (20) passing through the pole hole (111); A composite layer (13) is connected between the copper layer (12) and the aluminum layer (11), and the composite layer (13) is formed by combining copper and aluminum.

2. The conductive terminal according to claim 1, characterized in that, Along the axial direction of the pole hole (111), the conductive terminal (10) is provided with a receiving groove (101) on the side away from the pole (20), the receiving groove (101) is used to receive the weld vein of the pole (20) and the copper layer (12).

3. The conductive terminal according to claim 2, characterized in that, The receiving groove (101) is formed on the side of the copper layer (12) away from the aluminum layer (11).

4. The conductive terminal according to claim 3, characterized in that, The copper layer (12) is also provided with a through hole (121), which is connected to the receiving groove (101) and is used for the through hole (121) to pass through the pole (20).

5. The conductive terminal according to claim 4, characterized in that, The copper layer (12) is also provided with a riveting groove (102), which is located between the through hole (121) and the receiving groove (101) and communicates with the through hole (121) and the receiving groove (101). The riveting groove (102) is used to rivet the pole post (20) that passes through the through hole (121).

6. The conductive terminal according to claim 5, characterized in that, Along the axial direction of the pole hole (111), the composite layer (13) is located on the side of the riveting groove (102) away from the receiving groove (101) and is spaced apart from the bottom wall of the riveting groove (102).

7. The conductive terminal according to claim 6, characterized in that, Along the axial direction of the pole hole (111), the distance between the composite layer (13) and the bottom wall of the riveting groove (102) is H1, and H1 satisfies: H1≥0.3mm.

8. The conductive terminal according to claim 2, characterized in that, The receiving groove (101) is formed by the grooves formed on the side of the copper layer (12) and the aluminum layer (11) away from the pole post (20).

9. The conductive terminal according to claim 2, characterized in that, The conductive terminal (10) is also provided with a riveting groove (102), which is located between the pole hole (111) and the receiving groove (101) and communicates with the pole hole (111) and the receiving groove (101). The riveting groove (102) is used to rivet the pole (20) that passes through the pole hole (111).

10. The conductive terminal according to claim 9, characterized in that, The riveting groove (102) is formed by the grooves opened on the side of the copper layer (12) and the aluminum layer (11) away from the pole post (20).

11. The conductive terminal according to claim 2, characterized in that, The copper layer (12) is located away from the bottom wall of the connecting groove (112) and below the surface of the aluminum layer (11) where the connecting groove (112) is formed, so as to form the receiving groove (101) between the copper layer (12) and the aluminum layer (11).

12. The conductive terminal according to any one of claims 1-11, characterized in that, Two connecting grooves (112) are provided, and along the length direction of the conductive terminal (10), the connecting grooves (112) are located on both sides of the aluminum layer (11); or Two connecting grooves (112) are provided, and the connecting grooves (112) are located on both sides of the aluminum layer (11) along the width direction of the conductive terminal (10).

13. The conductive terminal according to any one of claims 1-11, characterized in that, Along the width direction of the conductive terminal (10), the connecting groove (112) is located in the middle of the aluminum layer (11); or Along the length of the conductive terminal (10), the connecting groove (112) is located in the middle of the aluminum layer (11).

14. The conductive terminal according to any one of claims 1-11, characterized in that, The thickness of the composite layer (13) ranges from 250 μm to 750 μm.

15. The conductive terminal according to any one of claims 1-11, characterized in that, The thickness of the copper layer (12) is H2, and the total thickness of the conductive terminal (10) is H3. H2 and H3 satisfy: 0.2H3≤H2≤0.5H3.

16. The conductive terminal according to any one of claims 1-11, characterized in that, The composite layer (13) is formed by the semi-molten solid-liquid composite at the contact interface between the copper layer (12) and the aluminum layer (11).

17. The conductive terminal according to claim 16, characterized in that, The composite layer (13) is 100% metallurgically composite of copper and aluminum.

18. A pole assembly, characterized in that, It includes a pole (20) and a conductive terminal (10) as described in any one of claims 1-17.

19. The pole assembly according to claim 18, characterized in that, The electrode (20) is a copper electrode.

20. The pole assembly according to claim 18, characterized in that, The pole post (20) has a pre-drilled hole (21) at one end facing the conductive terminal (10), and the pre-drilled hole (21) is used for positioning the riveting tool.

21. A cover plate, characterized in that, Includes a cover plate body (201) and a pole post assembly (100) as described in any one of claims 18-20, wherein the cover plate body (201) is provided with a first through hole (202) and the pole post (20) passes through the first through hole (202).

22. The cover plate according to claim 21, characterized in that, It also includes a lead-out piece (203) connected to the pole piece (20) and located on the side of the cover plate body (201) away from the conductive terminal (10).

23. The cover plate according to claim 22, characterized in that, The lead-out piece (203) is provided with a second through hole (204), and the pole post (20) passes through the second through hole (204).

24. The cover plate according to claim 22, characterized in that, It also includes a spacer (205), which is disposed on the cover plate body (201). The spacer (205) has a third through hole (206), through which the pole post (20) passes. The spacer (205) is used to separate the lead-out piece (203) from the cover plate body (201).

25. The cover plate according to claim 21, characterized in that, It also includes an insulating block (207), which is disposed on the cover plate body (201). The insulating block (207) has a fourth through hole (208), through which the pole post (20) passes. The insulating block (207) is used to separate the conductive terminal (10) from the cover plate body (201).

26. The cover plate according to claim 25, characterized in that, It also includes a sealing ring (209), which is sleeved on the pole post (20) and abuts against the insulating block (207). The sealing ring (209) is used to cooperate with the insulating block (207) to separate the pole post (20) from the cover plate body (201).

27. The cover plate according to claim 21, characterized in that, It also includes an explosion-proof valve (210), which is disposed on the cover plate body (201).

28. The cover plate according to claim 27, characterized in that, It also includes an explosion-proof valve protection plate (211), which covers the explosion-proof valve (210).

29. A battery, characterized in that, It includes a housing (301), a battery cell, and a cover plate (200) as described in any one of claims 21-28, wherein the battery cell is disposed in the housing (301) and the cover plate (200) covers the housing (301).

30. A battery pack, characterized in that, Includes the battery (300) as described in claim 29.

31. An electrical energy device, characterized in that, Includes the battery (300) as described in claim 29, or the battery pack as described in claim 30.

Images