Pole assembly, cover plate, battery, battery pack and electric energy equipment

Abstract

The invention relates to the technical field of batteries, in particular to a pole assembly, a cover plate, a battery, a battery pack and electric energy equipment. The pole assembly comprises a leading-out terminal arranged on the cover plate, the leading-out terminal comprises a leading-out part and a connecting part which are connected with each other, the leading-out part is used for being connected with a battery cell of the battery, and the connecting part is used for being connected with the outside. By arranging the leading-out terminal, integrating the leading-out part connected with the battery cell and integrating the connecting part on the leading-out terminal, current charging and discharging with the outside and integration of the leading-out terminal are carried out, so that the height of the pole assembly is reduced, the height occupied by the pole assembly on a cover plate is reduced, the utilization rate of the height space of the battery is improved, and the service life of the battery is prolonged. And the capacity of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a terminal 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. Batteries house the cells within a casing, and the current from the cells is conducted out through a cover assembly.

[0003] In existing technologies, the cover plate assembly has too many structural components and an unreasonable structural arrangement, which occupies a lot of internal space in the battery and affects the battery capacity. Summary of the Invention

[0004] This application provides a terminal assembly, a cover plate, a battery, a battery pack, and a power device to reduce the height of the terminal assembly, thereby reducing the space occupied by the cover plate inside the battery and increasing the battery capacity.

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

[0006] On one hand, this application provides a terminal assembly for use on a battery cover, comprising:

[0007] The lead-out terminal is located on the cover plate. The lead-out terminal includes a lead-out part and a connecting part connected to each other. The lead-out part is used to connect with the battery cell, and the connecting part is used to connect with the outside world.

[0008] In one possible implementation, the lead-out terminal also includes a pole portion, and the lead-out portion, pole portion, and connecting portion are integrally connected, with the pole portion used to connect the lead-out portion and the connecting portion.

[0009] In one possible implementation, the lead-out portion has a tab welding surface on the side opposite to the electrode post portion, which is used to weld with the electrode of the battery cell.

[0010] In one possible implementation, an external terminal is also included, which is connected to the connecting part.

[0011] In one possible implementation, the pole portion has a mounting blind hole on the side opposite to the lead-out portion, and the external terminal is located in the mounting blind hole.

[0012] In one possible implementation, the external terminal includes an integrally connected body portion and a boss portion, the boss portion being disposed in a mounting blind hole, and the body portion being connected to the connecting portion.

[0013] In one possible implementation, the external terminal has a connecting surface on the side opposite to the boss portion.

[0014] In one possible implementation, the connecting part has a terminal welding surface on the side opposite to the pole post, and the terminal welding surface is used to connect with the body part.

[0015] In one possible implementation, it also includes an adapter piece, which connects the terminal welding surface and the body.

[0016] In one possible implementation, the adapter includes an integrally connected adapter portion and a first flange, the adapter portion connecting the terminal welding surface and the body portion, and the first flange being disposed in a mounting blind hole.

[0017] In one possible implementation, the first flange has a first through hole, and the boss portion is disposed in the first through hole.

[0018] In one possible implementation, there is a gap between the boss portion and the wall of the first through hole.

[0019] In one possible implementation, the gap distance between the boss and the wall of the first through hole is A, where A > 0.3 mm.

[0020] In one possible implementation, the distance between the boss and the lead-out portion is greater than the distance between the first flange and the lead-out portion.

[0021] In one possible implementation, the adapter has a welding groove on the side facing the lead-out terminal, the welding groove being used to accommodate and connect the terminal welding surface.

[0022] In one possible implementation, the adapter has a welding top surface on the side facing the external terminal, and the welding top surface is used to connect to the main body.

[0023] In one possible implementation, an insulating ring is also included, which is fitted over the lead-out terminal.

[0024] In one possible implementation, the connecting part has an insulating welding surface on the side facing the lead-out part, and the insulating ring is connected to the insulating welding surface.

[0025] In one possible implementation, the adapter plate further includes a second flange connected to the side of the adapter portion away from the first flange, and an insulating welding surface is disposed between the first flange and the second flange.

[0026] In one possible implementation, the insulating ring has a first welding surface on the side facing the connection, and the first welding surface is welded to the insulating welding surface.

[0027] In one possible implementation, the insulating ring is provided with a second through hole, and the pole portion passes through the second through hole.

[0028] In one possible implementation, the insulating ring has a first clearance groove on the side facing the connection, and the first clearance groove communicates with the second through hole.

[0029] In one possible implementation, the connecting part has a buffer groove on the side facing the lead-out part, and the buffer groove is adjacent to the insulating welding surface.

[0030] In one possible implementation, a disc is also included, which is connected to the side of the insulating ring away from the connection portion.

[0031] In one possible implementation, the insulating ring has a second welding surface on the side facing the disc, and the disc has an insulating ring welding surface on the side facing the insulating ring, and the insulating ring welding surface is welded to the second welding surface.

[0032] In one possible implementation, the distance between the first welding surface and the second welding surface is B, where B satisfies: B≥0.8mm.

[0033] In one possible implementation, the side of the disc facing away from the insulating ring has a cover plate welding surface, which is used for welding with the cover plate.

[0034] In one possible implementation, the disc has a third through hole, and the pole portion passes through the third through hole.

[0035] In one possible implementation, the disc has a snap-fit ​​groove on the side facing the insulating ring, and the snap-fit ​​groove communicates with the third through hole.

[0036] On the other hand, this application provides a cover plate, including a cover plate body and the above-mentioned pole assembly. The cover plate body is provided with a fourth through hole, through which the lead-out terminal passes.

[0037] In one possible implementation, the cover body is provided with a housing positioning step, which is used to position the battery housing.

[0038] In one possible implementation, the cover plate body is provided with a pole mounting groove, which is connected to the fourth through hole.

[0039] In one possible implementation, a spacer is also included, which is disposed on the cover plate body and has a fourth through hole. The spacer is used to separate the lead-out terminal from the cover plate body.

[0040] In one possible implementation, the spacer ring has a fifth through hole, through which the lead-out terminal passes.

[0041] In one possible implementation, a snap-fit ​​is provided around the outer periphery of the fifth through hole, which is used to engage with the disc of the pole post assembly.

[0042] In one possible implementation, a second clearance groove is provided on the side of the spacer facing the cover plate body.

[0043] In one possible implementation, the lead-out portion has a tab welding surface on the side opposite to the connecting portion, and the distance between the tab welding surface and the cover plate body is greater than the distance between the surface of the spacer on the side opposite to the cover plate body and the cover plate body.

[0044] In one possible implementation, an explosion-proof valve is also included, which is located on the cover plate body.

[0045] In one possible implementation, an explosion-proof valve protection plate is also included, which is placed over the explosion-proof valve.

[0046] In another aspect, 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 to seal the battery cell.

[0047] In another aspect, this application provides a battery pack including the aforementioned battery.

[0048] In another aspect, this application provides an electrical power device, including the aforementioned battery or the aforementioned battery pack.

[0049] This application provides a terminal block assembly, cover plate, battery, battery pack, and power equipment. By incorporating lead-out terminals, the lead-out portion connecting to the battery cell is integrated onto the lead-out terminals, and a connection portion is integrated onto the lead-out terminals, thereby enabling charging and discharging of current with the external environment. Integrating the lead-out portion onto the lead-out terminals reduces the overall height of the terminal block assembly, thus reducing the height occupied by the cover plate and the space occupied by the cover plate in the battery height. This improves the utilization rate of the battery height space, allowing for the inclusion of larger battery cells or more cell materials, thereby increasing battery capacity. The integrated design also reduces contact points in the current transmission path, thereby reducing resistance, increasing the current carrying capacity of the terminal block assembly, improving current transmission efficiency, and facilitating rapid charging and discharging of the battery. Attached Figure Description

[0050] 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.

[0051] Figure 1 This is a schematic diagram of the structure of the pole assembly provided in the embodiments of this application;

[0052] Figure 2 for Figure 1 A partially exploded structural diagram of the pole assembly shown.

[0053] Figure 3 for Figure 1A cross-sectional view of the pole assembly shown;

[0054] Figure 4 for Figure 1 A cross-sectional view of the lead-out terminals of the pole assembly shown;

[0055] Figure 5 for Figure 1 A schematic diagram of the lead-out terminals of the electrode assembly shown;

[0056] Figure 6 for Figure 1 A cross-sectional view of the external terminals of the pole assembly shown;

[0057] Figure 7 for Figure 1 A cross-sectional view of the adapter piece of the pole assembly shown;

[0058] Figure 8 for Figure 1 A schematic diagram of the adapter plate of the pole assembly shown;

[0059] Figure 9 for Figure 1 A cross-sectional view of the insulating ring of the pole assembly shown;

[0060] Figure 10 for Figure 1 A schematic diagram of the insulating ring structure of the pole assembly shown;

[0061] Figure 11 for Figure 1 A cross-sectional view of the disk of the pole assembly shown;

[0062] Figure 12 for Figure 1 A schematic diagram of the disk structure of the pole assembly shown;

[0063] Figure 13 This is a schematic diagram of the structure of the cover plate provided in an embodiment of this application;

[0064] Figure 14 for Figure 13 A partially exploded structural diagram of the cover plate shown.

[0065] Figure 15 for Figure 13 A sectional view of the cover plate shown;

[0066] Figure 16 for Figure 13 A sectional view of the cover plate body shown;

[0067] Figure 17 for Figure 13 A schematic diagram of the cover plate body shown;

[0068] Figure 18 for Figure 13 A cross-sectional view of the spacer ring of the cover plate shown;

[0069] Figure 19 for Figure 13 One of the structural schematic diagrams of the spacer ring of the cover plate shown;

[0070] Figure 20 for Figure 13 The second schematic diagram of the spacer ring structure of the cover plate shown;

[0071] Figure 21 This is a schematic diagram of the battery structure provided in an embodiment of this application.

[0072] Explanation of reference numerals in the attached figures:

[0073] 100 - Cover plate; 10 - Pole post assembly; 11 - Lead-out terminal; 111 - Lead-out part; 112 - Pole post part; 113 - Connecting part; 114 - Pole tab welding surface; 115 - Mounting blind hole; 116 - Terminal welding surface; 117 - Insulating welding surface; 118 - Buffer groove; 12 - External terminal; 121 - Body part; 122 - Boss part; 123 - Connecting surface; 13 - Adapter piece; 131 - Adapter part; 132 - First flange; 133 - Second flange; 134 - First through hole; 135 - Welding groove; 136 - Welding top surface ; 14-Insulating ring; 141-First welding surface; 142-Second through hole; 143-First clearance groove; 144-Second welding surface; 15-Disc; 151-Insulating ring welding surface; 152-Cover plate welding surface; 153-Third through hole; 154-Snap-fit ​​groove; 20-Cover plate body; 21-Fourth through hole; 22-Housing positioning step; 23-Pole post mounting groove; 30-Spacer ring; 31-Fifth through hole; 32-Snap-fit; 33-Second clearance groove; 40-Explosion-proof valve; 50-Explosion-proof valve protective plate; 200-Battery; 201-Housing. Detailed Implementation

[0074] 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.

[0075] Currently, with the continuous development of new energy technologies, the requirements for battery packs are also constantly increasing. Batteries house the cells within a casing, and the current from the cells is conducted out through a cover assembly.

[0076] In the existing technology, the structural components of the cover plate assembly occupy a lot of internal space of the battery, which affects the battery capacity.

[0077] To overcome the shortcomings of existing technologies, after repeated consideration and verification, the inventors discovered that integrating the lead-out piece (i.e., the adapter piece) of the electrode core welding with the terminal post (i.e., the electrode terminal) not only helps to reduce its footprint in the battery height and improve the utilization rate of the battery height space, thereby increasing the battery capacity, the integrated terminal post and lead-out piece also reduce the number of welding operations and reduce the risk of battery self-discharge and short circuit caused by metal particle spatter from laser welding.

[0078] In view of this, this application provides a terminal assembly for use on a battery cover, comprising:

[0079] The lead-out terminal is located on the cover plate. The lead-out terminal includes a lead-out part and a connecting part connected to each other. The lead-out part is used to connect with the battery cell, and the connecting part is used to connect with the outside world.

[0080] By incorporating lead-out terminals, the lead-out portion connecting to the battery cell is integrated onto the lead-out terminals, and a connection portion is also integrated onto the lead-out terminals, thereby enabling charging and discharging of current with the external environment. Integrating the lead-out portion onto the lead-out terminals reduces the overall height of the terminal assembly, thus reducing the height occupied by the cover plate and the space occupied by the cover plate in the battery height. This improves the utilization rate of the battery height space, allowing for larger cells or more cell materials to be accommodated, increasing battery capacity. The integrated design also reduces contact points in the current transmission path, thereby reducing resistance, increasing the current-carrying capacity of the terminal assembly, improving current transmission efficiency, and facilitating rapid charging and discharging of the battery.

[0081] 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.

[0082] The following sections provide a detailed description of the specific structure of the pole assembly and various possible implementation methods.

[0083] Figure 1 This is a schematic diagram of the pole assembly provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shows a partial exploded view of the pole assembly. Figure 3 for Figure 1 The cross-sectional view of the pole assembly shown. Figure 4 for Figure 1 A cross-sectional view of the lead-out terminals of the pole assembly shown. Figure 5 for Figure 1 The diagram shows the structure of the lead-out terminals of the pole assembly. Figure 6 for Figure 1A cross-sectional view of the external terminals of the pole assembly shown. Figure 7 for Figure 1 A cross-sectional view of the adapter piece of the pole assembly shown. Figure 8 for Figure 1 The diagram shows the structure of the adapter piece of the pole assembly. Figure 9 for Figure 1 A cross-sectional view of the insulating ring of the pole assembly shown. Figure 10 for Figure 1 The diagram shows the structure of the insulating ring of the pole assembly. Figure 11 for Figure 1 A cross-sectional view of the disk of the pole assembly shown. Figure 12 for Figure 1 The diagram shows the structure of the disk in the pole assembly. Figure 13 This is a schematic diagram of the cover plate provided in an embodiment of this application. Figure 14 for Figure 13 A partial exploded view of the cover plate is shown. Figure 15 for Figure 13 The cover plate shown is a cross-sectional view. Figure 16 for Figure 13 The cover plate shown is a cross-sectional view of its body. Figure 17 for Figure 13 A schematic diagram of the cover plate body shown. Figure 18 for Figure 13 A cross-sectional view of the spacer ring of the cover plate shown. Figure 19 for Figure 13 One of the structural schematic diagrams of the spacer ring of the cover plate shown. Figure 20 for Figure 13 The second schematic diagram of the spacer ring structure of the cover plate is shown. Figure 21 This is a schematic diagram of the battery structure provided in an embodiment of this application.

[0084] like Figure 1 and Figure 13 As shown in the embodiment of this application, the terminal assembly 10 is used on the cover plate 100 of the battery 200. The terminal assembly 10 is used to connect the inside and outside of the battery 200.

[0085] like Figure 2 and Figure 3 As shown, the pole assembly 10 includes a lead-out terminal 11 and an external terminal 12. The lead-out terminal 11 is disposed on the cover plate 100. The external terminal 12 is connected to the lead-out terminal 11.

[0086] like Figure 4 and Figure 5 As shown, the lead-out terminal 11 includes a lead-out portion 111 and a connecting portion 113 connected to each other. The lead-out portion 111 is used to connect with the battery cell of the battery 200, and the connecting portion 113 is used to connect with the outside world.

[0087] In one possible implementation, the lead-out terminal 11 further includes a pole portion 112, and the lead-out portion 111, pole portion 112, and connecting portion 113 are integrally connected. The pole portion 112 is used to connect the lead-out portion 111 and the connecting portion 113. The connecting portion 113 is connected to the external terminal 12.

[0088] The lead-out terminal 11 integrates the electrode post and the lead-out piece, serving to connect the internal battery cell to the external terminal 12. It also replaces the function of the electrode post in existing technologies, eliminating the current bottleneck, increasing the current-carrying area, and improving current-carrying performance.

[0089] External terminal 12 is used to connect the cells and solve the problem of welding dissimilar metals.

[0090] By providing lead-out terminals 11, the lead-out portion 111, which connects to the battery cell, is integrated onto the terminal portion 112. A connecting portion 113 is integrated onto the terminal portion 112 to connect to the external terminal 12, thereby enabling charging and discharging of current with the outside environment. The integration of the lead-out portion 111 onto the terminal portion 112 reduces the overall height of the terminal assembly 10, thus reducing its height on the cover plate 100 and the space occupied by the cover plate 100 in the height of the battery 200. This improves the utilization rate of the height space of the battery 200, allowing for the inclusion of larger battery cells or more battery cell materials, thereby increasing the capacity of the battery 200. The integrated design also reduces the number of contact points in the current transmission path, thereby reducing resistance, increasing the current-carrying capacity of the terminal assembly 10, and improving current transmission efficiency, which is beneficial for achieving rapid charging and discharging of the battery 200.

[0091] Furthermore, by integrating the lead-out portion 111, the terminal portion 112, and the connecting portion 113, the length and area of ​​the lead-out terminal 11 can be increased, thereby reducing the difficulty of assembly and welding, improving the welding yield, and also improving the overcurrent and heat dissipation capabilities of the battery 200. The integrated lead-out portion 111, terminal portion 112, and connecting portion 113 also reduce the number of welding operations on the terminal assembly 10, reducing the risk of battery self-discharge and short circuits caused by metal particle spatter from laser welding.

[0092] In one possible implementation, the lead-out terminal 11 is made of copper, aluminum or other alloy metal materials, which can be obtained by stamping, machining or other processing methods.

[0093] In one possible implementation, the lead-out portion 111 has a tab welding surface 114 on the side opposite to the electrode post portion 112, and the tab welding surface 114 is used to weld with the electrode of the battery cell.

[0094] By providing a tab welding surface 114 on the lead-out portion 111, a dedicated welding area can be provided for the tab of the battery cell, which helps to optimize the welding position, simplify the welding process, improve production efficiency, and make the welding process more precise and reliable.

[0095] The dedicated tab welding surface 114 can provide a more stable electrical connection, reduce the risk of poor welding or poor contact, better control the heat distribution during the welding process, reduce the thermal impact on the cell and other sensitive components, protect the structural integrity and performance of the battery, and thus improve the overall performance and reliability of the battery.

[0096] In one possible implementation, the pole portion 112 has a mounting blind hole 115 on the side opposite to the lead-out portion 111, and the external terminal 12 is disposed in the mounting blind hole 115.

[0097] By providing a blind hole 115 in the terminal post 112 and placing the external terminal 12 therein, the internal space of the terminal post 112 can be effectively utilized, thereby reducing the external dimensions of the terminal post assembly 10, which helps to reduce the overall height or volume of the battery and improve space utilization.

[0098] Furthermore, placing the external terminal 12 in the mounting blind hole 115 provides it with physical protection, reducing the risk of damage caused by external environmental factors such as mechanical shock, vibration, or contaminants, and helps improve the battery's durability and reliability.

[0099] Meanwhile, the mounting blind hole 115 provides a structure for fixing and supporting the external terminal 12, making the connection of the external terminal 12 more secure. Furthermore, the mounting blind hole 115 can serve as a guide for positioning and fixing, and can also simplify the installation process of the external terminal 12, making assembly faster and more precise.

[0100] like Figure 6 As shown, in one possible implementation, the external terminal 12 includes an integrally connected body portion 121 and a boss portion 122. The boss portion 122 is disposed in the mounting blind hole 115, and the body portion 121 is connected to the connecting portion 113.

[0101] The boss 122 is embedded in the mounting blind hole 115, providing additional mechanical support and positioning function, which helps ensure the stability of the external terminal 12 during use and reduces the risk of loosening or falling off. The design of the boss 122 can also serve as a guide during the assembly process, making it easier to accurately align and connect the body 121 to the connector 113, thereby improving assembly accuracy and reducing installation errors.

[0102] The boss portion 122 is integrally connected to the body portion 121, which can more effectively transmit mechanical stress and electrical load, improve the mechanical strength and electrical performance of the external terminal 12, and ensure reliability under high load conditions. The boss portion 122 can also absorb the heat of the body portion 121 during welding, thereby improving the welding yield.

[0103] Meanwhile, the integrated design reduces the number of independent parts of the pole assembly 10, simplifies the manufacturing process, improves production efficiency, and reduces manufacturing costs.

[0104] In one possible implementation, the external terminal 12 can be a metal material with good conductivity, such as aluminum, copper, or steel.

[0105] In one possible implementation, the external terminal 12 can be obtained by processing methods such as stamping or machining.

[0106] In one possible implementation, the external terminal 12 has a connecting surface 123 on the side opposite to the boss portion 122.

[0107] Connection surface 123 provides a dedicated interface for connecting external circuits or devices, accommodating different types of connection needs and improving connection flexibility. Connection surface 123 can serve as a standardized interface, making subsequent electrical connections simpler and faster.

[0108] The connection surface 123 can provide additional mechanical support, enhance the stability of the external terminal 12 when connected to other components, and reduce the risk of loosening or disconnection.

[0109] In one possible implementation, the connecting portion 113 has a terminal welding surface 116 on the side opposite to the pole portion 112, and the terminal welding surface 116 is used to connect with the body portion 121.

[0110] The terminal welding surface 116 provides a dedicated area for welding, which optimizes the welding process, improves the accuracy and consistency of the welding, and thus ensures a stable electrical connection.

[0111] By connecting the two parts through a special terminal welding surface 116, the mechanical strength between the connection part 113 and the body part 121 can be improved, reducing the risk of loosening or breakage due to vibration or mechanical stress during use.

[0112] The terminal welding surface 116 can serve as a positioning and fixing point during the assembly process, making the welding and connection process simpler and faster, and improving production efficiency.

[0113] like Figure 7 and Figure 8 As shown, in one possible implementation, the pole assembly 10 further includes an adapter piece 13, which connects the terminal welding surface 116 and the body portion 121.

[0114] The adapter piece 13 is used to solve the problem of welding corrosion between the lead-out terminal 11 and the external terminal 12 when they are dissimilar metals, and to provide a transition. If the lead-out terminal 11 and the external terminal 12 are the same metal, there is no problem of welding corrosion during welding, and the adapter piece 13 is not required.

[0115] As an intermediate connecting component, adapter piece 13 offers greater flexibility to adapt to different design requirements and space constraints. Adapter piece 13 provides additional mechanical support, enhancing the stability of the entire connection structure, effectively dispersing and absorbing mechanical stress, and reducing fatigue and damage risks at the connection points. Adapter piece 13 helps disperse heat during the welding process, reducing the thermal impact on sensitive components and protecting the structural integrity and performance of the battery.

[0116] The use of adapter 13 can optimize the current transmission path, reduce resistance, and improve the efficiency of electrical connections, which helps to improve the overall performance of the battery, especially in high-current applications.

[0117] In one possible implementation, the adapter piece 13 can be made of nickel or other copper- or aluminum-compatible alloy metals.

[0118] In one possible implementation, the adapter piece 13 can be formed by stamping.

[0119] In one possible implementation, the adapter piece 13 includes an integrally connected adapter portion 131 and a first flange 132. The adapter portion 131 connects the terminal welding surface 116 and the body portion 121, and the first flange 132 is disposed in the mounting blind hole 115.

[0120] The first flange 132 is located in the mounting blind hole 115, which provides additional mechanical fixation and support, helping to ensure the stability of the adapter piece 13 during use and reducing the risk of loosening or falling off. The first flange 132 can also serve as a positioning and fixing point during the assembly process, making the installation of the adapter piece 13 more convenient and precise, and improving assembly efficiency and accuracy.

[0121] The design of the first flange 132 can effectively disperse mechanical stress and enhance the stability and durability of the entire connection structure.

[0122] In one possible implementation, the first flange 132 has a first through hole 134, and the boss portion 122 is disposed in the first through hole 134.

[0123] By placing the boss portion 122 in the first through hole 134, additional mechanical fixation and support are provided, which helps to ensure a more secure connection between the external terminal 12 and the adapter piece 13, reducing the risk of loosening or falling off.

[0124] The first through hole 134 can serve as a positioning guide, making it easier to align and fix the boss 122 during assembly, thus improving assembly accuracy and reducing installation errors. The combined design of the first through hole 134 and the boss 122 simplifies the assembly process, making component installation more convenient and faster, and improving production efficiency.

[0125] The first through hole 134 is also used to absorb welding expansion, thereby improving the welding yield of the adapter piece 13.

[0126] In one possible implementation, there is a gap between the boss portion 122 and the wall surface of the first through hole 134.

[0127] The gap provides space for the thermal expansion of the material, preventing excessive stress or deformation caused by thermal expansion. At the same time, the gap allows for a certain installation tolerance, enabling smooth installation even with slight dimensional deviations during assembly, thus improving the flexibility and efficiency of the assembly process.

[0128] The gap can also prevent material wear or deformation caused by excessive tightness, thereby extending the service life of the component.

[0129] In this application, there is a gap between the boss portion 122 and the wall surface of the first through hole 134, which is also used to reserve space for the thermal expansion of the external terminal 12 during the high-temperature brazing process, to prevent the external terminal 12 from expanding and squeezing the insulating ring 14 located outside the pole assembly 10, which would cause the insulating ring 14 to crack, thereby improving the welding yield.

[0130] In one possible implementation, the gap distance between the boss portion 122 and the wall surface of the first through hole 134 is A, where A satisfies: A > 0.3 mm.

[0131] In one possible implementation, the wall of the first through hole 134 is a first flange 132. The gap between the boss portion 122 and the wall of the first through hole 134 is the gap between the boss portion 122 and the first flange 132.

[0132] A gap greater than 0.3mm can provide sufficient buffer space for the thermal expansion of the boss 122 during the high-temperature brazing process, and prevent the boss 122 from deforming and squeezing the insulating ring 14 due to thermal stress.

[0133] At the same time, the larger clearance allows for greater assembly tolerance, ensuring smooth component installation even with certain dimensional deviations during manufacturing and assembly. This improves production efficiency and reduces assembly difficulty.

[0134] In one possible implementation, the distance between the boss portion 122 and the lead-out portion 111 is greater than the distance between the first flange 132 and the lead-out portion 111.

[0135] By setting the distance between the boss portion 122 and the lead-out portion 111 to be greater than the distance 1022 between the first flange 132 and the lead-out portion 111, the edge of the first flange 132 will be closer to the lead-out portion 111 after installation, thereby covering the boss portion 122 and preventing corrosion from occurring due to contact between the boss portion 122 and the lead-out portion 111 during the brazing expansion process.

[0136] By increasing the distance between the boss portion 122 and the lead-out portion 111, mechanical stress can be effectively dispersed, reducing the risk of stress concentration at a single location, thereby improving the mechanical stability and durability of the entire structure.

[0137] A greater distance can improve heat dissipation efficiency, reduce heat accumulation in local areas, thereby reducing the risk of overheating and protecting the performance and lifespan of the battery and other components.

[0138] By optimizing the distance between components, mutual interference between mechanical parts can be reduced, thus lowering the likelihood of wear and damage.

[0139] In one possible implementation, the adapter 131 has a welding groove 135 on the side facing the lead-out terminal 11, the welding groove 135 being used to accommodate and connect the insulating welding surface 117.

[0140] The welding groove 135 provides a dedicated area for welding, which can increase the welding area, thereby enhancing the weld strength and the robustness of the connection, and helps to ensure the stability and reliability of the electrical connection.

[0141] Meanwhile, the design of the welding groove 135 can serve as a positioning guide during the welding process, making the welding process simpler and faster, resulting in more precise welding, reducing assembly time and costs, and minimizing the risk of welding deviations and defective welds. The welding groove 135 can also protect the welding area to some extent from external mechanical damage or environmental influences, such as vibration, impact, or corrosion, thereby improving the durability of the weld joint.

[0142] The 135 welding groove design also makes the welding points more concealed and neat, improving the overall appearance and compactness of the components.

[0143] In one possible implementation, the wall of the welding groove 135 is connected to the insulating welding surface 117 by brazing.

[0144] In one possible implementation, the adapter 131 has a welding top surface 136 on the side facing the external terminal 12, and the welding top surface 136 is used to connect the main body 121.

[0145] The welding top surface 136 provides a flat and dedicated area for welding, which can increase the welding area, thereby enhancing the weld strength and the robustness of the connection, and ensuring the stability and reliability of the electrical connection.

[0146] The flat welding top surface 136 facilitates precise welding positioning, reduces the risk of welding deviations and defective solder joints, and improves welding quality. Simultaneously, the welding top surface 136 can more effectively disperse the heat generated during the welding process, reducing the thermal impact on surrounding components and protecting the performance and lifespan of the battery and other sensitive components.

[0147] The welded top surface 136 can also provide additional mechanical support, enhancing the stability and durability of the entire connection structure and reducing the risk of loosening or breakage.

[0148] In one possible implementation, the welded top surface 136 is connected to the body portion 121 by brazing.

[0149] like Figure 9 and Figure 10 As shown, in one possible implementation, the pole assembly 10 further includes an insulating ring 14, which is sleeved on the lead-out terminal 11.

[0150] The insulating ring 14 provides electrical insulation, separating the positive and negative terminals of the battery 200 to prevent current from flowing along unwanted paths, thereby avoiding short circuits or leakage in the battery 200 and improving the safety and reliability of the system.

[0151] The insulating ring 14 isolates direct contact between different metals, reducing the risk of electrochemical corrosion and thus extending the component's lifespan. Simultaneously, the insulating ring 14 provides additional mechanical protection against external physical damage or environmental factors such as moisture and dust on the weld surface.

[0152] Insulating materials typically have low thermal conductivity, which reduces heat buildup in sensitive areas, helps manage heat generated during welding, and protects component performance. Furthermore, the insulating ring 14 can serve as a positioning reference during assembly, improving assembly accuracy and consistency, and simplifying manufacturing and assembly processes.

[0153] In one possible implementation, the insulating ring 14 is made of ceramic. The insulating ring 14 can also be made of plastic material, such as PP (Polypropylene), PPS (Polyphenylene sulfide), PPO (Polyphenylene Oxide), etc. The difference lies in the assembly process of the terminal assembly 10: ceramic materials are brazed, while plastic materials are injection molded.

[0154] In one possible implementation, the connecting portion 113 has an insulating welding surface 117 on the side facing the lead-out portion 111.

[0155] The insulating welding surface 117 provides a dedicated area for welding, which increases the welding area, thereby enhancing the welding strength and the robustness of the connection, ensuring the stability and reliability of the electrical connection.

[0156] The insulating weld surface 117 simplifies and speeds up the welding process, improving production efficiency and reducing assembly time and costs. The insulating weld surface 117 also provides additional mechanical support, enhancing the stability and durability of the entire connection structure and reducing the risk of loosening or breakage.

[0157] In one possible implementation, the adapter piece 13 further includes a second flange 133, which is connected to the side of the adapter portion 131 away from the first flange 132, and an insulating welding surface 117 is disposed between the first flange 132 and the second flange 133.

[0158] The dual support design of the first flange 132 and the second flange 133 can provide better mechanical stability and reduce the loosening or deformation that may occur during the use of the adapter piece 13.

[0159] By providing an insulating welding surface 117 between the two flanges, mechanical and thermal stresses can be distributed more evenly, reducing the risk of stress concentration and thus improving the durability of the connection.

[0160] The two flanges can serve as positioning references during the assembly process, making welding and assembly more precise and convenient, and improving production efficiency.

[0161] In one possible implementation, the insulating ring 14 has a first welding surface 141 on the side facing the connection portion 113, and the first welding surface 141 is welded to the insulating welding surface 117.

[0162] Through welding, the insulating ring 14 and the insulating welded surface 117 form a continuous insulating barrier, effectively preventing current leakage and short circuits, and improving the electrical safety of the system.

[0163] The welded connection provides additional mechanical fixation, enhancing the bond strength between the insulating ring 14 and the lead-out terminal 11 and reducing the risk of loosening or detachment. Welding ensures tight contact between the insulating ring 14 and the insulating weld surface 117, which helps to distribute and manage heat more evenly, protecting the performance and lifespan of the component.

[0164] In one possible implementation, the first welding surface 141 is connected to the insulating welding surface 117 by brazing.

[0165] In one possible implementation, the insulating ring 14 is provided with a second through hole 142, and the pole post 112 passes through the second through hole 142.

[0166] By allowing the electrode post 112 to pass through the second through hole 142 of the insulating ring 14, the electrode post 112 can be effectively isolated from other conductive components, preventing current leakage and short circuits, and improving the electrical safety of the system.

[0167] The second through hole 142 provides a fixed and supported structure for the pole post 112, enhancing the mechanical stability of the pole post 112 and reducing the risk of displacement or loosening under vibration or impact conditions.

[0168] The design of the second through hole 142 can also serve as a positioning guide during the assembly process, making the installation of the pole piece 112 more precise and convenient, and improving production efficiency.

[0169] The insulating ring 14 helps to isolate heat from the terminal 112, reducing heat conduction to other sensitive components and thus optimizing the thermal management of the system.

[0170] In one possible implementation, the insulating ring 14 is provided with a first clearance groove 143 on the side facing the connection portion 113, and the first clearance groove 143 communicates with the second through hole 142.

[0171] The design of the first clearance groove 143 can provide additional space for the pole post or other components, facilitating the positioning and adjustment of components and improving the flexibility and efficiency of the assembly process.

[0172] The design of the first clearance groove 143 increases the creepage distance and insulation distance, further optimizes the layout of the insulating ring 14, ensures effective isolation between the pole post 112 and other conductive components, and enhances the electrical insulation effect.

[0173] In one possible implementation, the insulating ring 14 is also provided with a first clearance groove 143 on the side facing the lead-out portion 111, and the first clearance groove 143 is connected to the second through hole 142.

[0174] In one possible implementation, the connecting portion 113 is provided with a buffer groove 118 on the side facing the lead-out portion 111, and the buffer groove 118 is adjacent to the insulating welding surface 117.

[0175] The design of the buffer groove 118 effectively disperses mechanical stress, reducing the risk of stress concentration on the insulating weld surface 117 or other critical areas, thereby reducing the likelihood of material fatigue and damage and improving the durability of the component. The buffer groove 118 provides space to alleviate stress caused by thermal expansion and contraction, preventing the effects of thermal cycling on the insulating weld surface 117 and connecting components.

[0176] The buffer groove 118 can also serve as a positioning and alignment reference during manufacturing and assembly processes, improving production efficiency and assembly accuracy. The buffer groove 118 can absorb and mitigate mechanical vibration and impact to a certain extent, protecting the insulated welding surface 117 and other connecting components from damage, and enhancing the mechanical stability of the system.

[0177] like Figure 11 and Figure 12 As shown, in one possible implementation, the pole assembly 10 further includes a disc 15, which is connected to the side of the insulating ring 14 opposite to the connection portion 113.

[0178] The disc 15 is used to connect and seal the terminal assembly 10 and the cover plate 100 of the battery 200.

[0179] The disc 15 provides additional mechanical support for the insulating ring 14 and the entire terminal assembly 10, enhancing the structural integrity and stability of the assembly. The disc 15 also acts as an additional insulating layer, further isolating electrical components, preventing current leakage, and improving the electrical safety of the system.

[0180] Disc materials typically possess good thermal conductivity, aiding in heat dissipation and reducing heat buildup within components, thereby protecting the performance and lifespan of sensitive parts. Disc 15 can also absorb and mitigate mechanical vibrations and shocks to some extent, protecting welded surfaces and other connecting parts from damage and enhancing the mechanical stability of the system. The design of Disc 15 can serve as a positioning and alignment reference during assembly, improving production efficiency and assembly accuracy.

[0181] In one possible implementation, the disc 15 is made of aluminum, aluminum alloy, or other connectable metal materials. The disc 15 can be obtained through processing methods such as stamping and machining.

[0182] In one possible implementation, the insulating ring 14 has a second welding surface 144 on the side facing the disc 15, and the second welding surface 144 is welded to the disc 15.

[0183] By welding the insulating ring 14 and the disc 15 together, a robust integral structure is formed, which enhances the mechanical stability of the assembly and reduces the risk of loosening or separation.

[0184] The welded connection ensures a tight contact between the insulating ring 14 and the disc 15, further enhancing electrical insulation, preventing current leakage, and improving system safety. The weld provides an excellent heat conduction path, facilitating heat transfer from the insulating ring 14 to the disc 15, thus dissipating heat more effectively and protecting component performance and lifespan.

[0185] The welded connection allows the insulating ring 14 and the disc 15 to be treated as a single unit, simplifying the assembly process and improving production efficiency and assembly accuracy. Welding provides a sealed interface, preventing the intrusion of moisture, dust, and other environmental factors, thereby improving the system's durability.

[0186] In one possible implementation, the second welding surface 144 is connected to the disc 15 by brazing.

[0187] In one possible implementation, the distance between the first welding surface 141 and the second welding surface 144 is B, where B satisfies: B≥0.8mm.

[0188] The thicker insulating ring 14, at least 0.8 mm, provides better electrical insulation performance, effectively preventing current leakage and short circuits, and improving the electrical safety of the system. Increasing the thickness enhances the mechanical strength of the insulating ring 14, making it more resistant to mechanical stress, vibration, and shock, thereby improving the durability and stability of the component. The thicker insulating ring 14 also more effectively isolates heat, reducing the possibility of heat conduction to other sensitive components and helping to maintain the thermal stability of the system.

[0189] In one possible implementation, the side of the disc 15 facing the insulating ring 14 is provided with an insulating ring welding surface 151, which is welded to the second welding surface 144.

[0190] Through welding, the insulating ring 14 and the disc 15 form a robust integral structure, enhancing the mechanical stability of the component and reducing the risk of loosening or separation. The welding connection between the insulating ring welding surface 151 and the second welding surface 144 ensures tight contact between the insulating ring 14 and the disc 15, further enhancing the electrical insulation effect, preventing current leakage, and improving system safety.

[0191] In one possible implementation, the disc 15 has a cover plate welding surface 152 on the side opposite to the insulating ring 14, which is used to weld to the cover plate 100.

[0192] Through welding, the disc 15 and the cover 100 form a robust integral structure, enhancing the mechanical stability and structural integrity of the assembly and reducing the risk of loosening or separation. Welding provides a sealed interface, preventing the intrusion of moisture, dust, and other environmental factors, thereby improving the system's durability and reliability. The welded connection strengthens the bond between the cover 100 and the disc 15, enabling the entire assembly to better resist mechanical stress, vibration, and impact.

[0193] In one possible implementation, the disc 15 is provided with a third through hole 153, and the pole portion 112 passes through the third through hole 153.

[0194] The third through-hole 153 provides a fixed and supported structure for the pole piece 112, enhancing its mechanical stability and reducing the risk of displacement or loosening under vibration or impact conditions. The design of the third through-hole 153 serves as a positioning guide during assembly, making the installation of the pole piece 112 more precise and convenient, thus improving production efficiency. By allowing the pole piece 112 to pass through the third through-hole 153 of the disc 15, the electrical connection can be extended and integrated, ensuring effective current transmission. Through proper design, the third through-hole 153 can help isolate the pole piece 112 from other conductive components, preventing current leakage and short circuits, and improving the electrical safety of the system.

[0195] The design of the third through-hole 153 can also promote air circulation, help dissipate heat, reduce the accumulation of heat in local areas, and thus optimize the thermal management of the system.

[0196] In one possible implementation, the disc 15 has a snap-fit ​​groove 154 on the side facing the insulating ring 14, and the snap-fit ​​groove 154 communicates with the third through hole 153.

[0197] The snap-fit ​​groove 154 provides an additional mechanical fixing point, which helps to securely hold the spacer 30 in place and reduces the risk of displacement or loosening under vibration or impact conditions.

[0198] The design of the snap-fit ​​slot 154 can serve as an alignment and fixing reference during the assembly process, making component installation more precise and convenient, and improving production efficiency.

[0199] Since the main connection process of the pole assembly 10 is brazing, the welding temperatures and welding process parameters of various components are inconsistent during the assembly process, so it is necessary to perform welding in sections. First, the insulating ring 14 and the lead-out terminal 11 are assembled and then brazed at high temperature. Then, the external terminal 12, the adapter piece 13 and the disc 15 are assembled and brazed at a temperature lower than that of the first brazing.

[0200] The specific assembly process of the pole post assembly 10 also requires:

[0201] First, taking the insulating ring 14 as the reference, the insulating ring 14 needs to have high strength. The strength of the insulating ring 14 is related to the thickness of the insulating ring 14, so a thicker insulating ring 14 is selected.

[0202] 2. After the tab welding surface 114 of the lead-out terminal 11 passes through the second through hole 142, the insulating welding surface 117 and the first welding surface 141 of the insulating ring 14 abut together to perform brazing, thereby realizing the assembly of the lead-out terminal 11 and the insulating ring 14. The buffer groove 118 can solve the stress problem caused by the thermal expansion of the lead-out terminal 11 during the brazing process, prevent the brazing stress from causing the insulating ring 14 to crack, and improve the welding yield.

[0203] 3. When installing the adapter plate 13, the second flange 133 and the lead-out terminal 11 are matched in shape for positioning; the welding groove 135 and the terminal welding surface 116 are in contact and connected by brazing; the first flange 132 extends into the mounting blind hole 115.

[0204] IV. When installing the external terminal 12, the boss portion 122 of the external terminal 12 passes through the first through hole 134 and is installed on the adapter piece 13. The body portion 121 and the welding top surface 136 are attached to each other and connected after brazing.

[0205] 5. When installing the disc 15, the lead-out part 111 of the lead-out terminal 11 is connected by brazing through the third through hole 153, the insulating ring welding surface 151 and the second welding surface 144.

[0206] The electrode assembly 10 provided in this application embodiment includes a lead-out terminal 11, which is disposed on the cover plate 100. The lead-out terminal 11 includes an integrally connected lead-out portion 111, an electrode portion 112, and a connecting portion 113. The lead-out portion 111 is used to connect with the battery cell of the battery 200, and the electrode portion 112 connects the lead-out portion 111 and the connecting portion 113.

[0207] By providing lead-out terminals 11, the lead-out portion 111, which is welded to the battery cell, is integrated onto the terminal portion 112, and a connection portion 113 is integrated onto the terminal portion 112, thereby enabling charging and discharging of current with the outside world. The integration of the lead-out portion 111 onto the terminal portion 112 reduces the overall height of the terminal assembly 10, thus reducing the height occupied by the cover plate 100 and the space occupied by the cover plate 100 in the height of the battery 200. This improves the utilization rate of the height space of the battery 200, allowing for the inclusion of larger battery cells or more battery cell materials, thereby increasing the capacity of the battery 200. The integrated design also reduces the number of contact points in the current transmission path, thereby reducing resistance and improving current transmission efficiency.

[0208] like Figure 14 and Figure 15 As shown in the figure, this application embodiment also provides a cover plate 100, including the above-described pole assembly 10.

[0209] Given that the cover plate 100 in this embodiment includes the pole post assembly 10 described in any of the above embodiments, the cover plate 100 includes the pole post assembly 10 structure and beneficial effects, which will not be described in detail here.

[0210] like Figure 16 and Figure 17 As shown, in one possible implementation, it also includes a cover plate body 20, which has a fourth through hole 21 through which the lead-out terminal 11 passes.

[0211] The cover body 20 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 fourth through-hole 21 provides a fixed and supported structure for the lead-out terminal 11, enhancing its mechanical stability and reducing the risk of displacement or loosening under vibration or impact conditions. The design of the fourth through-hole 21 serves as a positioning guide during assembly, making the installation of the lead-out terminal 11 more precise and convenient, improving production efficiency. By allowing the lead-out terminal 11 to pass through the fourth through-hole 21 of the cover body 20, the extension and integration of electrical connections can be achieved, ensuring efficient current transmission.

[0212] In one possible implementation, the cover plate body 20 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.

[0213] In one possible implementation, the cover body 20 is provided with a housing positioning step 22, which is used to position the housing 201 of the battery 200.

[0214] The housing positioning step 22 provides a clear positioning reference for the battery housing 201, enabling the battery 200 to be accurately placed in the designated position during assembly, thus improving assembly accuracy. By providing a clear positioning structure, the housing positioning step 22 simplifies the assembly process, reduces the requirements for alignment and fixation, and improves production efficiency. The housing positioning step 22 helps to fix the battery housing 201, reducing the risk of displacement or loosening under vibration or impact conditions, thereby enhancing the mechanical stability of the system.

[0215] In one possible implementation, the cover plate body 20 is provided with a pole mounting groove 23, which communicates with the fourth through hole 21. The disc 15 in the pole assembly 10 abuts against the pole mounting groove 23.

[0216] The pole mounting groove 23 provides an additional fixing and support structure for the pole assembly 10, enhancing the mechanical stability of the pole assembly 10 and reducing the risk of displacement or loosening under vibration or impact conditions.

[0217] The design of the pole mounting groove 23 can serve as an alignment and fixing reference during the assembly process, making the installation of the pole assembly 10 more accurate and convenient, and improving production efficiency.

[0218] like Figure 18 , Figure 19 and Figure 20 As shown, in one possible implementation, a spacer 30 is also included. The spacer 30 is disposed on the cover plate body 20 and passes through the fourth through hole 21. The spacer 30 is used to separate the lead-out terminal 11 from the cover plate body 20.

[0219] Spacer 30 provides an additional insulating layer, effectively preventing electrical contact between the lead-out terminal 11 and the cover body 20, reducing the risk of short circuits and current leakage, and improving the electrical safety of the system. Spacer 30 can protect the lead-out terminal 11 from mechanical stress and environmental factors such as vibration, shock, moisture, and dust, thereby improving the durability and reliability of the lead-out terminal 11.

[0220] The design of the spacer ring 30 can also help to position and fix the lead-out terminal 11, making the assembly process simpler and more efficient, and improving production efficiency.

[0221] In one possible implementation, the spacer 30 is made of an insulating material, such as PP or PPS, which are insoluble in electrolyte, and serves as an insulating element.

[0222] In one possible implementation, the spacer 30 is provided with a fifth through hole 31, through which the lead-out terminal 11 passes.

[0223] The fifth through-hole 31, through the design of the spacer 30, provides an additional insulating layer, ensuring electrical isolation between the lead-out terminal 11 and other components, reducing the risk of short circuits and current leakage, and improving the electrical safety of the system. The fifth through-hole 31 provides a clear positioning and fixing structure for the lead-out terminal 11, enabling it to be accurately placed in the designated position during assembly, improving assembly accuracy. Simultaneously, the fifth through-hole 31 provides additional support for the lead-out terminal 11, enhancing its mechanical stability and reducing the risk of displacement or loosening under vibration or impact conditions.

[0224] In one possible implementation, the spacer 30 has a latch 32 around the outer periphery of the fifth through hole 31, which is used to engage with the disc 15 of the pole post assembly 10. The latch 32 engages in the engagement groove 154 of the disc 15.

[0225] The snap-fit ​​32 provides an additional mechanical fixing point, ensuring a secure connection between the spacer 30 and the disc 15 of the pole post assembly 10, reducing the risk of displacement or loosening under vibration or impact conditions. The snap-fit ​​32 design makes connecting the spacer 30 to the disc 15 faster and easier, requiring no additional tools or fasteners, thereby improving production efficiency and assembly accuracy. The snap-fit ​​32 design also ensures that the spacer 30 remains stable after installation, reducing displacement caused by external forces and improving the overall stability of the system.

[0226] In one possible implementation, the spacer 30 is provided with a second clearance groove 33 on the side facing the cover plate body 20.

[0227] The second relief groove 33 provides a space to accommodate the weld vein (welding protrusion) formed during the welding process, preventing the weld vein from interfering with or contacting other components, improving the accuracy and reliability of the assembly. By providing a dedicated space for the weld vein, it avoids mechanical interference of the weld vein with other components and reduces wear and potential damage between components.

[0228] By preventing the weld vein from affecting other components, the second clearance groove 33 helps improve the overall system reliability, reduce failure rate and maintenance requirements.

[0229] In one possible implementation, the lead-out portion 111 has a tab welding surface 114 on the side opposite to the pole post portion 112. The distance between the tab welding surface 114 and the cover plate body 20 is greater than the distance between the surface of the spacer 30 on the side opposite to the cover plate body 20 and the cover plate body 20. This prevents interference between the tab and the tab welding surface 114 and the spacer 30 during welding, thus avoiding affecting the welding yield and welding quality.

[0230] By increasing the distance between the electrode welding surface 114 and the cover plate body 20, the risk of short circuits that may occur during the welding process can be effectively prevented, ensuring electrical safety.

[0231] The greater distance provides sufficient space for welding operations, reduces interference with other components during the welding process, and improves the quality and reliability of the welding.

[0232] Increasing the distance between the electrode welding surface 114 and the cover plate body 20 can reduce the impact of the heat generated during welding on the cover plate body 20 and other components, thus protecting temperature-sensitive components.

[0233] In one possible implementation, an explosion-proof valve 40 is also included, which is disposed on the cover plate body 20.

[0234] The main function of the explosion-proof valve 40 is to release excessive internal pressure, thereby preventing the battery 200 from exploding or rupturing under abnormal conditions (such as overcharging, overheating or internal short circuit), and significantly improving the safety of the system.

[0235] In one possible implementation, the explosion-proof valve 40 is made of alloy materials such as pure aluminum or stainless steel.

[0236] In one possible implementation, an explosion-proof valve protection plate 50 is also included, which covers the explosion-proof valve 40.

[0237] The explosion-proof valve protection plate 50 can protect the explosion-proof valve 40 from external physical damage, such as impact, scratch or other mechanical stress, thereby extending the service life of the explosion-proof valve 40.

[0238] In one possible implementation, the explosion-proof valve protection plate 50 is made of PET or other plastic materials.

[0239] The assembly process of the cover plate 100 in this application is as follows: the pole post assembly 10 and the cover plate body 20 are connected by laser welding. The lead-out terminal 11 of the pole post assembly 10 passes through the fourth through hole 21 of the cover plate body 20. The electrode tab welding surface 14 protrudes from the bottom surface of the cover plate body 20. After the buckle 32 of the spacer ring 30 passes through the fourth through hole 21 and the third through hole 153, it is fastened on the snap-fit ​​groove 154 to achieve the fixed assembly of the spacer ring 30. After the assembly is completed, the electrode tab welding surface 14 should protrude from the spacer ring 30 to prevent interference between the electrode tab and the electrode tab welding surface 14 and the spacer ring 30 during welding, which would affect the welding yield and welding quality. Finally, the cover plate welding surface 152 abuts against the cover plate body 20 to perform welding connection.

[0240] like Figure 21 As shown, this application embodiment also provides a battery 200, including a housing 201, a battery cell and the aforementioned cover plate 100. The battery cell is disposed in the housing 201, and the cover plate 100 covers the housing 201 to seal the battery cell.

[0241] The cover plate 100 can be either a positive electrode cover plate or a negative electrode cover plate.

[0242] This application embodiment also provides a battery pack, including the battery 200 described above.

[0243] In addition, this application embodiment also provides an electrical power device, including the battery 200 described above, or the battery pack described above.

[0244] The electrical equipment also includes electrical devices. Battery 200, or the aforementioned battery pack, is used to provide electrical power to the electrical devices.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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).

[0250] 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.

[0251] 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 terminal assembly for use on a cover plate (100) of a battery (200), characterized in that, include: A lead-out terminal (11) is provided on the cover plate (100). The lead-out terminal (11) includes a lead-out part (111) and a connecting part (113) connected to each other. The lead-out part (111) is used to connect with the cell of the battery (200), and the connecting part (113) is used to connect with the outside world.

2. The pole assembly according to claim 1, characterized in that, The lead-out terminal (11) also includes a pole post (112), the lead-out portion (111), the pole post (112) and the connecting portion (113) are integrally connected, and the pole post (112) is used to connect the lead-out portion (111) and the connecting portion (113).

3. The pole assembly according to claim 2, characterized in that, The lead-out portion (111) has a tab welding surface (114) on the side opposite to the pole portion (112), and the tab welding surface (114) is used to weld with the tab of the battery cell.

4. The pole assembly according to claim 2, characterized in that, It also includes an external terminal (12) which is connected to the connecting part (113).

5. The pole assembly according to claim 4, characterized in that, The pole post (112) has a mounting blind hole (115) on the side opposite to the lead-out part (111), and the external terminal (12) is located in the mounting blind hole (115).

6. The electrode assembly according to claim 5, characterized in that, The external terminal (12) includes an integrally connected body part (121) and a boss part (122), the boss part (122) is disposed in the mounting blind hole (115), and the body part (121) is connected to the connecting part (113).

7. The pole assembly according to claim 6, characterized in that, The external terminal (12) has a connecting surface (123) on the side opposite to the boss (122).

8. The pole assembly according to claim 6, characterized in that, The connecting part (113) has a terminal welding surface (116) on the side opposite to the pole part (112), and the terminal welding surface (116) is used to connect with the body part (121).

9. The pole assembly according to claim 8, characterized in that, It also includes an adapter piece (13) that connects the terminal welding surface (116) and the body portion (121).

10. The pole assembly according to claim 9, characterized in that, The adapter plate (13) includes an integrally connected adapter portion (131) and a first flange (132). The adapter portion (131) connects the terminal welding surface (116) and the body portion (121). The first flange (132) is disposed in the mounting blind hole (115).

11. The pole assembly according to claim 10, characterized in that, The first flange (132) is provided with a first through hole (134), and the boss (122) is provided in the first through hole (134).

12. The pole assembly according to claim 11, characterized in that, There is a gap between the boss (122) and the wall of the first through hole (134).

13. The pole assembly according to claim 12, characterized in that, The gap distance between the boss (122) and the wall of the first through hole (134) is A, and A satisfies: A > 0.3 mm.

14. The pole assembly according to claim 11, characterized in that, The distance between the boss portion (122) and the lead-out portion (111) is greater than the distance between the first flange (132) and the lead-out portion (111).

15. The pole assembly according to claim 13, characterized in that, The adapter (131) has a welding groove (135) on the side facing the lead-out terminal (11), and the welding groove (135) is used to accommodate and connect the terminal welding surface (116).

16. The pole assembly according to claim 13, characterized in that, The adapter (131) has a welding top surface (136) on the side facing the external terminal (12), and the welding top surface (136) is used to connect the main body (121).

17. The pole assembly according to claim 13, characterized in that, It also includes an insulating ring (14) which is sleeved on the outside of the lead-out terminal (11).

18. The pole assembly according to claim 17, characterized in that, The connecting part (113) has an insulating welding surface (117) on the side facing the lead-out part (111), and the insulating ring (14) is connected to the insulating welding surface (117).

19. The pole assembly according to claim 18, characterized in that, The adapter plate (13) further includes a second flange (133), which is connected to the side of the adapter portion (131) away from the first flange (132), and the insulating welding surface (117) is disposed between the first flange (132) and the second flange (133).

20. The pole assembly according to claim 19, characterized in that, The insulating ring (14) has a first welding surface (141) on the side facing the connecting part (113), and the first welding surface (141) is welded to the insulating welding surface (117).

21. The pole assembly according to claim 19, characterized in that, The insulating ring (14) is provided with a second through hole (142), and the pole post (112) passes through the second through hole (142).

22. The pole assembly according to claim 21, characterized in that, The insulating ring (14) has a first clearance groove (143) on the side facing the connecting part (113), and the first clearance groove (143) communicates with the second through hole (142).

23. The pole assembly according to claim 18, characterized in that, The connecting part (113) is provided with a buffer groove (118) on the side facing the lead-out part (111), and the buffer groove (118) is adjacent to the insulating welding surface (117).

24. The pole assembly according to claim 20, characterized in that, It also includes a disc (15) which is connected to the side of the insulating ring (14) away from the connecting part (113).

25. The pole assembly according to claim 24, characterized in that, The insulating ring (14) has a second welding surface (144) on the side facing the disc (15), and the disc (15) has an insulating ring welding surface (151) on the side facing the insulating ring (14). The insulating ring welding surface (151) is welded to the second welding surface (144).

26. The pole assembly according to claim 25, characterized in that, The distance between the first welding surface (141) and the second welding surface (144) is B, and B satisfies: B≥0.8mm.

27. The pole assembly according to claim 26, characterized in that, The disc (15) has a cover plate welding surface (152) on the side opposite to the insulating ring (14), and the cover plate welding surface (152) is used to weld with the cover plate (100).

28. The pole assembly according to claim 24, characterized in that, The disc (15) is provided with a third through hole (153), and the pole part (112) passes through the third through hole (153).

29. The pole assembly according to claim 28, characterized in that, The disc (15) has a snap-fit ​​groove (154) on the side facing the insulating ring (14), and the snap-fit ​​groove (154) is connected to the third through hole (153).

30. A cover plate, characterized in that, Includes a cover plate body (20) and a pole post assembly (10) as described in any one of claims 1-29, wherein the cover plate body (20) is provided with a fourth through hole (21) and the lead-out terminal (11) passes through the fourth through hole (21).

31. The cover plate according to claim 30, characterized in that, The cover plate body (20) is provided with a housing positioning step (22), which is used to position the battery housing (201).

32. The cover plate according to claim 30, characterized in that, The cover plate body (20) is provided with a pole mounting groove (23), which is connected to the fourth through hole (21).

33. The cover plate according to claim 30, characterized in that, It also includes a spacer (30), which is disposed on the cover plate body (20) and passes through the fourth through hole (21). The spacer (30) is used to separate the lead-out terminal (11) from the cover plate body (20).

34. The cover plate according to claim 33, characterized in that, The spacer (30) is provided with a fifth through hole (31), and the lead-out terminal (11) passes through the fifth through hole (31).

35. The cover plate according to claim 34, characterized in that, The spacer (30) is provided with a buckle (32) around the outer periphery of the fifth through hole (31), and the buckle (32) is used to engage with the disc (15) of the pole assembly (10).

36. The cover plate according to claim 33, characterized in that, The spacer ring (30) has a second clearance groove (33) on the side facing the cover plate body (20).

37. The cover plate according to claim 33, characterized in that, The lead-out portion (111) has a tab welding surface (114) on the side away from the connecting portion (113). The distance between the tab welding surface (114) and the cover plate body (20) is greater than the distance between the surface of the spacer ring (30) away from the cover plate body (20) and the cover plate body (20).

38. The cover plate according to claim 30, characterized in that, It also includes an explosion-proof valve (40), which is disposed on the cover plate body (20).

39. The cover plate according to claim 38, characterized in that, It also includes an explosion-proof valve protection plate (50), which covers the explosion-proof valve (40).

40. A battery, characterized in that, The device includes a housing (201), a battery cell, and a cover plate (100) as described in any one of claims 30-39, wherein the battery cell is disposed in the housing (201), and the cover plate (100) covers the housing (201) to seal the battery cell.

41. A battery pack, characterized in that, Includes the battery (200) as described in claim 40.

42. An electrical energy device, characterized in that, Includes the battery (200) as described in claim 40, or the battery pack as described in claim 41.

Images