Pole, cover plate assembly, battery monomer, battery and power utilization device

Abstract

The utility model discloses a pole, a cover plate assembly, a battery monomer, a battery and an electric device, and belongs to the technical field of batteries. The pole is applied to a battery monomer and comprises a connecting part and a lead-out sheet, the connecting part is provided with a connecting surface connected with a tab of the battery monomer; the leading-out sheet is connected with the connecting part and is in a sheet shape, and the area of the cross section, parallel to the connecting surface, of the leading-out sheet is smaller than that of the cross section, parallel to the connecting surface, of the connecting part. Through the cooperation of the connecting part and the lead-out sheet, the conductive performance can be optimized, the battery structure can be simplified, the space can be fully utilized, and the heat dissipation area of the battery can be improved, so that the overcurrent capability of a battery cell and the high-rate quick charging capability of the battery can be improved, and meanwhile, through the arrangement of the lead-out sheet connected with the connecting part, the use of part connecting sheets can be reduced, the welding process can be simplified, and the production cost can be reduced. And the production efficiency is improved.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a terminal post, a cover plate assembly, a battery cell, a battery, and an electrical device. Background Art

[0002] The batteries in the related art mainly use conventional types of terminal post aluminum blocks. The terminal posts between battery cells are connected through connecting piece monomers, and the terminal post aluminum blocks and the connecting piece monomers are electrically connected by welding to achieve the connection of the battery module. The connecting piece of the component is inconvenient to use, and the welding process is relatively complex, which affects the production efficiency and connection reliability of the battery module, and there is room for improvement. Summary of the Utility Model

[0003] This application aims to at least solve the technical problem of the complex welding process of the connecting piece of the component in the related art. For this reason, this application provides a terminal post, a cover plate assembly, a battery cell, a battery, and an electrical device, which can connect battery cells through a sheet-shaped terminal post, thereby reducing the use of connecting pieces of components and simplifying the welding process.

[0004] In a first aspect, this application provides a terminal post applied to a battery cell, including:

[0005] A connecting portion having a connecting surface for connecting with the tab of the battery cell;

[0006] A lead-out piece connected to the connecting portion, the lead-out piece being sheet-shaped, and the area of the cross-section parallel to the connecting surface being smaller than the area of the cross-section of the connecting portion parallel to the connecting surface.

[0007] Through the cooperation of the connecting portion and the lead-out piece, the high-rate fast charging ability of the battery can be improved, the battery structure can be simplified, the cover plate space can be fully utilized, the current collector heat dissipation area can be increased, thereby improving the over-current ability of the battery cell. At the same time, the lead-out piece connected to the connecting portion can reduce the use of connecting pieces of components and simplify the welding process.

[0008] According to an embodiment of this application, the lead-out piece is provided with a weakening portion distributed along the width direction of the lead-out piece, and the stiffness of the weakening portion is less than the stiffness of other regions of the lead-out piece.

[0009] By providing the weakening portion on the lead-out piece and the stiffness of the weakening portion being less than the stiffness of other regions of the lead-out piece, the lead-out piece can be bent at the weakening portion, and the stress distribution of the battery cell can be effectively adjusted, improving safety.

[0010] According to an embodiment of this application, the thickness of the weakening portion is less than the thickness of other regions of the lead-out piece;

[0011] Or,

[0012] The weakening portion includes a weakening groove provided on the surface of the lead-out piece;

[0013] Or,

[0014] The material hardness of the weakening portion is less than that of other regions of the lead-out piece.

[0015] By setting the weakening portion in various ways, the position and direction of the bending of the lead-out piece can be accurately controlled. Ways such as thickness difference, weakening groove, and material hardness difference can be selected according to actual situations to achieve the best design effect.

[0016] According to an embodiment of the present application, the lead-out piece is provided with a positioning portion.

[0017] By providing the positioning portion on the lead-out piece, it can be ensured that the lead-out piece can be accurately and firmly installed or connected to a specific position or device.

[0018] According to an embodiment of the present application, the thickness of the lead-out piece is L1, satisfying: 0.2 mm ≤ L1 ≤ 2 mm;

[0019] And / or,

[0020] The width of the lead-out piece is L2, satisfying: 5 mm ≤ L2 ≤ 200 mm.

[0021] In practical applications, the size design of the lead-out piece is determined according to specific usage scenarios, functional requirements, material characteristics, and cost considerations to ensure that the lead-out piece can meet a wide range of application requirements while keeping its performance and manufacturing cost within an acceptable range.

[0022] In a second aspect, the present application provides a cover plate assembly applied to a battery, including:

[0023] A cover plate body, the cover plate body is provided with a through hole;

[0024] A pole column as described in any one of the above, the connecting portion is located on the first side of the cover plate body, and the lead-out piece penetrates through the through hole.

[0025] The cover plate body and the pole column can provide a safe and stable channel for the connection between the internal circuit and the external circuit of the battery. At the same time, through the cooperation of the connecting portion and the lead-out piece on the pole column, it can be ensured that the battery can maintain good performance under various working conditions.

[0026] According to an embodiment of the present application, when the lead-out piece is provided with a weakening portion, the weakening portion is located on the second side of the cover plate body.

[0027] Providing the weakened portion on the lead-out piece and locating it on the second side of the cover body can control the position and direction of the breakage or deformation of the lead-out piece, avoid damage to the internal or external circuit of the battery, and help improve the safety, maintainability and performance stability of the battery.

[0028] According to an embodiment of the present application, a height of the lead-out piece at a portion of the weakened portion away from the first side of the cover body is greater than a thickness of the cover body at at least one side of the via hole.

[0029] The height of a portion of the lead-out plate associated with the weakened portion and facing away from the first side of the cover body is greater than the thickness of an area on the cover body adjacent to or opposite to the via hole to provide sufficient strength, stability or space to accommodate other components or functions.

[0030] According to an embodiment of the present application, the cover plate assembly further includes: a seal, which is clamped between the pole and the cover plate body and seals the through hole.

[0031] The cover plate assembly provides a safe and stable connection and protection for the battery through the coordinated action of the cover plate body, the pole and the seal. At the same time, the seal, as a key component to ensure the internal sealing of the battery, plays a vital role in the performance and safety of the battery.

[0032] According to one embodiment of the present application, the sealing element comprises:

[0033] The first part is sleeved outside the lead-out sheet and at least partially located in the via hole;

[0034] The second part is connected to the first part and clamped between the first side of the cover body and the connecting portion.

[0035] The structural configuration and installation method of the seal can enhance the sealing performance, improve the structural stability, and facilitate installation and maintenance.

[0036] According to one embodiment of the present application, the cover plate assembly further includes:

[0037] An insulating member is installed between the lead-out piece and the cover plate body.

[0038] The cover plate assembly can not only ensure a stable connection between the internal and external circuits of the battery, but also improve the safety and reliability of the battery through the insulating member and the sealing member. At the same time, a sink groove is provided on the second side of the cover plate body, which can increase the structural strength and improve the heat dissipation performance.

[0039] In a third aspect, the present application provides a battery cell, comprising:

[0040] a housing;

[0041] a battery core, disposed within the housing;

[0042] a cover plate assembly as described in any one of the above, mounted on the housing, and the connecting portion is connected to the tab of the battery core.

[0043] The battery cell has a compact structure, high safety, high energy density, good stability, and is easy to maintain, and is applicable to various application scenarios requiring high-performance batteries.

[0044] In a fourth aspect, the present application provides a battery, comprising:

[0045] a plurality of battery cells, and the battery cells are connected in a lap joint manner through the lead-out sheets.

[0046] By combining a plurality of the battery cells, the total energy density of the battery can be improved. At the same time, the lap joint connection method of the lead-out sheets can ensure the effective transmission of electric energy, and is also beneficial to improving the stability and safety of the battery.

[0047] In a fifth aspect, the present application provides an electrical device, comprising:

[0048] a battery, which is used to supply electric energy to the electrical device.

[0049] The electrical device uses the battery as its main power source, and has the advantages of continuous power supply, good stability, high portability, energy conservation and environmental protection, etc., and is applicable to various devices and systems that require electric energy drive.

[0050] The additional aspects and advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0052] Figure 1 is a schematic structural diagram of a terminal provided by an embodiment of the present application;

[0053] Figure 2 is one of the schematic structural diagrams of a battery cell provided by an embodiment of the present application;

[0054] Figure 3 is an exploded schematic diagram of a battery cell provided by an embodiment of the present application;

[0055] Figure 4 isFigure 3 Partial enlarged view at position A;

[0056] Figure 5 It is the second schematic structural view of the battery cell provided by the embodiment of the present application;

[0057] Figure 6 is Figure 5 Partial enlarged view at position B;

[0058] Figure 7 It is the first schematic structural view of the battery provided by the embodiment of the present application;

[0059] Figure 8 It is the second schematic structural view of the battery provided by the embodiment of the present application.

[0060] Reference signs:

[0061] Battery cell 1;

[0062] Cover plate assembly 10;

[0063] Cover plate body 110, first side 110a, second side 110b, via hole 111;

[0064] Terminal post 120, connecting portion 121, lead-out piece 122, weakening portion 123, positioning portion 124;

[0065] Sealing member 130, first part 131, second part 132;

[0066] Insulating member 140, sinking groove 141;

[0067] Electric core 20, tab 210;

[0068] Housing 30. Detailed implementation manners

[0069] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0070] The present application aims to at least solve the technical problem of complex welding processes of component connecting pieces in related technologies. For this purpose, the present application provides a terminal post, a cover plate assembly, a battery cell, a battery, and an electrical device, which can connect the battery cells through a sheet-shaped terminal post, thereby reducing the use of component connecting pieces and simplifying the welding process.

[0071] Next, reference is made to Figures 1 - 8 Describe the terminal post 120 according to the embodiment of the present application.

[0072] As shown Figure 1 in Figure 1 , the terminal post 120 is applied to the battery cell 1, including: a connecting portion 121 and a lead piece 122. The connecting portion 121 has a connecting surface for connecting with the tab 210 of the battery cell 1. The lead piece 122 is connected to the connecting portion 121. The lead piece 122 is sheet-shaped, and the area of the cross-section parallel to the connecting surface is smaller than the area of the cross-section of the connecting portion 121 parallel to the connecting surface.

[0073] In the technical solution of this application, the terminal post 120 is composed of two main parts, namely the connecting portion 121 and the lead piece 122. The main function of the connecting portion 121 is to connect the tab 210 of the battery cell 1. The tab 210 is the part in the battery cell 1 for connecting with the external circuit, usually located at the positive and negative terminals of the battery. The connecting portion 121 has a connecting surface for tightly connecting with the tab 210 of the battery cell 1 to ensure good contact with the tab 210, so as to reduce resistance and improve the performance of the battery. The lead piece 122 is sheet-shaped, connected to the connecting portion 121 to form an integral structure, and has a relatively large planar area and a small thickness.

[0074] The lead piece 122 is sheet-shaped, that is, the length and width of the lead piece 122 are much larger than the thickness. For example, the ratio of the width to the thickness can be between 25 and 100. While ensuring sufficient mechanical strength, the cross-sectional area can be increased to carry a larger current. The lead piece 122 mainly plays the role of connection and conduction. Sufficient mechanical strength can make the lead piece 122 not easily bend or deform when subjected to external forces. Sufficient cross-sectional area can carry a larger current and enable the current to pass smoothly.

[0075] The area of the cross-section of the lead piece 122 parallel to the connecting surface is smaller than the area of the cross-section of the connecting portion 121 parallel to the connecting surface, which helps to ensure that the current can be evenly distributed when passing through the connecting portion 121, reducing the risk of local overheating or excessive current. At the same time, the smaller area of the lead piece 122 also helps to reduce the use of materials and lower costs. The connecting surface is the side facing away from the lead piece 122, that is, the connecting surface is located on the side of the connecting portion 121 opposite to the lead piece 122.

[0076] It can be understood that the terminal post 120 plays the role of connecting the tab 210 and leading out the current in the battery cell 1, ensuring the stable transmission of the current and the high-efficiency performance of the battery. At the same time, by optimizing the shapes and areas of the connecting portion 121 and the lead piece 122, the safety and reliability of the battery can be further improved.

[0077] In the related art, the connection between the battery poles 120 is mainly achieved through a connecting piece to realize the connection of the battery module. In this application, the module connection between the single cells is mainly realized by bending and overlapping the sheet-shaped poles 120 and then welding them together. The welding method can be laser welding, which reduces the use of the connecting piece of the component. The welding process changes from welding the connecting piece to the pole 120 respectively to directly welding the sheet-shaped poles 120, improving the production efficiency and connection reliability of the module.

[0078] According to the pole 120 provided by the embodiment of the present application, through the cooperation of the connecting portion 121 and the lead-out piece 122, the conductive performance can be optimized, the battery structure can be simplified, the space can be fully utilized, and the battery heat dissipation area can be increased, thereby improving the over-current capacity of the battery cell 20 and the high-rate fast charging capacity of the battery. At the same time, by providing the lead-out piece 122 connected to the connecting portion 121, the use of the connecting piece of the component can be reduced, and the welding process can be simplified, thereby improving the production efficiency.

[0079] In some embodiments, as Figure 1 shown, the lead-out piece 122 is provided with a weakening portion 123 distributed along the width direction of the lead-out piece 122, and the stiffness of the weakening portion 123 is less than that of other regions of the lead-out piece 122.

[0080] In the technical solution of the present application, taking the width direction of the lead-out piece 122 as the first direction, the weakening portion 123 on the lead-out piece 122 is one or more regions distributed along its width direction, and the stiffness of the weakening portion 123 is less than that of other regions of the lead-out piece 122. For example, the material thickness of the weakening portion 123 is thinner, there are notches or other forms of structural modifications to reduce its bending or torsional resistance, so that the lead-out piece 122 can be bent by 0 to 90° at the weakening portion 123.

[0081] By setting the weakening portion 123 at a specific position, the stress distribution of the lead-out piece 122 when subjected to external force or internal stress can be adjusted, which helps to avoid stress concentration in unnecessary regions, thereby improving the reliability and durability of the overall structure. At the same time, the lead-out piece 122 can be bent by 0 to 90° at the weakening portion 123. And when the battery cell 1 is subjected to external impact or internal failure resulting in increased pressure, the weakening portion 123 can serve as a predetermined breaking point to help the battery release pressure or disconnect the circuit under safe conditions, preventing more serious accidents from occurring. In some manufacturing processes, the weakening portion 123 can also be used as a positioning point or cutting point during processing, simplifying the processing flow and improving the production efficiency.

[0082] According to the specific form and material of the weakening portion 123, different manufacturing processes can be used for manufacturing. When the weakening portion 123 is realized by thinning the material thickness, laser cutting, stamping or other machining methods can be used. When the weakening portion 123 is realized by punching or grooving, drilling, milling or other processing techniques can be used.

[0083] It can be understood that by providing a weakening portion 123 on the lead-out piece 122 and making the stiffness of the weakening portion 123 less than that of other regions of the lead-out piece 122, the lead-out piece 122 can be bent at the weakening portion 123, and the stress distribution of the battery cell 1 can be effectively adjusted to improve safety.

[0084] The lead-out piece 122 may be provided with a weakening portion 123 distributed along the width direction of the lead-out piece 122. The stiffness of the weakening portion 123 is less than that of other regions of the lead-out piece 122. The weakening portion 123 has various structural forms, including but not limited to:

[0085] First, the thickness of the weakening portion 123 is less than the thickness of other regions of the lead-out piece 122.

[0086] In the technical solution of the present application, the thickness of the weakening portion 123 may be less than the thickness of other regions of the lead-out piece 122, resulting in the stiffness of the weakening portion 123 being less than that of other regions of the lead-out piece 122. When subjected to the same external force, the weakening portion 123 is more likely to deform or break, guiding the fracture direction or ensuring that the fracture occurs at a predetermined position, thereby protecting other parts of the battery from damage.

[0087] Second, the weakening portion 123 includes a weakening groove provided on the surface of the lead-out piece 122.

[0088] In the technical solution of the present application, the weakening portion 123 may include a weakening groove provided on the surface of the lead-out piece 122. The weakening groove is a structure engraved on the surface of the lead-out piece 122. It can be a long groove, that is, a continuous long strip-shaped incision, or a plurality of intermittent grooves, that is, a series of discontinuous incisions, for reducing the strength of this region, guiding the fracture direction or ensuring that the fracture occurs at a predetermined position, thereby protecting other parts of the battery from damage. Among them, the long groove can provide a clear fracture path, while the intermittent groove can provide more flexibility.

[0089] Third, the material hardness of the weakening portion 123 is less than the material hardness of other regions of the lead-out piece 122.

[0090] In the technical solution of the present application, the material hardness of the weakening portion 123 may be less than the material hardness of other regions of the lead-out piece 122. When subjected to an external force, the weakening portion 123 is more likely to deform or be damaged, thereby protecting other parts of the battery from damage. Material hardness refers to the ability of a material to resist local deformation, such as plastic deformation, indentation or scratching. The reduction of the material hardness of the weakening portion 123 can be achieved by changing the material formula, heat treatment or other processing methods, and is used to control the fracture or deformation position.

[0091] It can be understood that by setting the weakening portion 123 in various ways, the bending position and direction of the lead-out piece 122 can be precisely controlled. Ways such as thickness difference, weakening groove, and material hardness difference can be selected and used according to the actual situation to achieve the best design effect.

[0092] In some embodiments, as Figure 1 shown, the lead-out piece 122 is provided with a positioning portion 124.

[0093] In the technical solution of the present application, when the positioning portion 124 is provided on the lead-out piece 122, it can ensure that the lead-out piece 122 can be accurately and firmly installed or connected to a specific position or device. The positioning portion 124 can be designed into a specific shape that matches the corresponding part on the receiving device, such as a groove, a protrusion, a hole, or other geometric features, to ensure that the lead-out piece 122 is accurately placed in the predetermined position. The positioning portion 124 can also include a buckle, a hook, a latch, or other mechanical devices for cooperating with the corresponding part on the receiving device to lock the position of the lead-out piece 122, providing additional stability and preventing displacement.

[0094] The positioning portion 124 can include one or more positioning holes that are used in cooperation with pins, bolts, or other fasteners on the receiving device to ensure that the lead-out piece 122 is fixed in the correct position. The positioning portion 124 can also be designed with guiding edges for guiding the lead-out piece 122 to slide or insert into the receiving device along a predetermined path, simplifying the installation process. The positioning portion 124 can include magnetic materials that interact with the corresponding magnetic parts on the receiving device, thereby providing a simple and effective positioning method. The positioning portion 124 can also have a certain degree of elasticity or flexibility to adapt to receiving devices of different sizes or shapes while still providing a stable positioning effect.

[0095] It can be understood that by providing the positioning portion 124 on the lead-out piece 122, it can ensure that the lead-out piece 122 can be accurately and firmly installed or connected to a specific position or device.

[0096] In some embodiments, the thickness of the lead-out piece 122 is L1, which can satisfy: 0.2 mm ≤ L1 ≤ 2 mm, or the width of the lead-out piece 122 is L2, which satisfies: 5 mm ≤ L2 ≤ 200 mm. It is also possible that both the thickness L1 and the width L2 of the lead-out piece 122 satisfy: 0.2 mm ≤ L1 ≤ 2 mm and 5 mm ≤ L2 ≤ 200 mm.

[0097] In the technical solution of this application, the thickness of the lead-out piece 122 is between 0.2 mm and 2 mm. Within this range, a thinner lead-out piece 122 may be suitable for occasions that require lightweight and space saving, while a thicker lead-out piece 122 may have higher mechanical strength and durability. The width of the lead-out piece 122 is between 5 mm and 200 mm. Within this range, a narrower lead-out piece 122 may be suitable for environments with limited space or occasions that require precise positioning, while a wider lead-out piece 122 may be used for applications that require a larger contact area or heat dissipation capacity. The lead-out piece 122 can meet the thickness range and width range respectively, or meet both ranges simultaneously.

[0098] When the thickness of the lead-out piece 122 is 0.2 mm, the thickness of the lead-out piece 122 is relatively thin. Therefore, the mechanical strength of the lead-out piece 122 is relatively low. When in use, it is necessary to pay attention to avoiding excessive external force or stress to prevent it from deforming or breaking. At the same time, the lead-out piece 122 with a smaller thickness has advantages in applications with limited space, such as micro batteries or electronic products that require a compact design.

[0099] When the thickness of the lead-out piece 122 is 2 mm, the thickness of the lead-out piece 122 is relatively thick. Therefore, the lead-out piece 122 has higher mechanical strength and durability, can withstand greater external force or stress, and is suitable for applications that require high reliability. At the same time, the lead-out piece 122 with a larger thickness has better heat dissipation performance, is suitable for high-power or high-heat applications, and can also provide more stable connection and support.

[0100] When the width of the lead-out piece 122 is 5 mm, the width of the lead-out piece 122 is relatively narrow, which may limit the current-carrying capacity of the lead-out piece 122. When designing, it is necessary to consider the current density and heat dissipation problems to ensure that the lead-out piece 122 will not overheat or be damaged. At the same time, the relatively narrow width can provide sufficient flexibility, be suitable for applications that require bending or deformation, and occupy less space.

[0101] When the width of the lead-out piece 122 is 200 mm, the width of the lead-out piece 122 is relatively wide, and the lead-out piece 122 has a relatively higher current-carrying capacity, which is suitable for applications that require carrying large currents, such as electric vehicles or large energy storage systems. At the same time, the wider surface can provide better heat dissipation performance, which helps to reduce the temperature of the lead-out piece 122, improve its reliability and service life, and is suitable for applications that require large-area contact or heat dissipation.

[0102] It can be understood that in actual applications, the size design of the lead-out piece 122 can be determined according to specific usage scenarios, functional requirements, material properties, and cost considerations to ensure that the lead-out piece 122 can meet a wide range of application requirements while keeping its performance and manufacturing cost within an acceptable range.

[0103] Such asFigures 2 - 4 As shown in the figure, an embodiment of the present application further provides a cover plate assembly 10, which is applied to a battery and includes: a cover plate body 110 and a pole 120. The cover plate body 110 is provided with a through hole 111. A connecting portion 121 is located on the first side 110a of the cover plate body 110, and a lead-out piece 122 passes through the through hole 111.

[0104] In the technical solution of the present application, the cover plate body 110 is the main part of the battery cover plate, which plays a role in protecting the internal structure of the battery and connecting the external circuit. The cover plate body 110 is provided with a through hole 111 to facilitate the lead-out piece 122 to pass through and connect with the external circuit or device. The connecting portion 121 is located on the first side 110a of the cover plate body 110, that is, the side of the cover plate body 110 connected to the inside of the battery, and is directly connected to the lead-out piece 122. The thickness L1 and width L2 of the lead-out piece 122 meet specific specification requirements, ensuring that the lead-out piece 122 has sufficient conductivity and mechanical strength, and at the same time adapting to different application environments.

[0105] The main function of the connecting portion 121 is to provide a stable and reliable connection point for the lead-out piece 122, ensuring good contact between the lead-out piece 122 and the internal circuit of the battery. The connecting portion 121 can be a brazing point or a complex connection structure, such as bolt connection, snap connection, etc., ensuring that the connecting portion 121 has sufficient mechanical strength and conductivity to withstand various stresses and currents that may occur during the operation of the battery.

[0106] The lead-out piece 122 is an important component for connecting the battery to the external circuit and is a connection bridge between the internal circuit and the external circuit of the battery. It passes through the through hole 111, one end is connected to the connecting portion 121, and the other end contacts the external circuit through the through hole 111 of the battery cover plate. The lead-out piece 122 is usually made of a metal material with good conductivity, such as copper, aluminum, etc., which can ensure good conductivity and safety to prevent problems such as short circuit and leakage during the use of the battery. At the same time, when designing the cover plate assembly 10, the safety of the battery can also be fully considered. The edge of the through hole 111 is smooth and burr-free, which can prevent scratching the pole 120. The connecting portion 121 is firm and reliable, which can ensure a stable connection between the lead-out piece 122 and the battery. The cover plate body 110 has good sealing performance, which can prevent the leakage of the electrolyte inside the battery.

[0107] It can be understood that the cover plate body 110 and the pole 120 can provide a safe and stable channel for connecting the internal circuit and the external circuit of the battery. At the same time, through the cooperation of the connecting portion 121 and the lead-out piece 122 on the pole 120, it can be ensured that the battery can maintain good performance under various working conditions.

[0108] In some embodiments, such as Figure 3 and Figure 4As shown, when the weakening portion 123 is provided on the lead-out piece 122, the weakening portion 123 is located on the second side 110b of the cover plate body 110.

[0109] In the technical solution of the present application, the weakening portion 123 is a special area on the lead-out piece 122, which is used to bend the lead-out piece 122, or under specific conditions, such as being subjected to external force, temperature change, etc., it preferentially deforms or breaks, which helps to control the position and direction of the break or deformation to meet specific application requirements. The weakening portion 123 is located on the second side 110b of the cover plate body 110, that is, the connection side of the lead-out piece 122 to the external circuit after passing through the through hole 111, which helps to guide the direction of break or deformation when needed and avoid damaging the internal or external circuit of the battery.

[0110] The weakening portion 123 can improve the safety of the battery. When the battery undergoes abnormal conditions such as overcharging, over-discharging, and short-circuiting, the weakening portion 123 can break preferentially, thereby cutting off the connection between the battery and the external circuit and preventing the further expansion of the fault. The weakening portion 123 can also improve the maintainability of the battery. When replacing or repairing the battery, the lead-out piece 122 can be conveniently disassembled or installed by controlling the breakage of the weakening portion 123. At the same time, the material of the weakening portion 123 has a certain toughness or brittleness so that it can deform or break when needed. The length, width, and shape of the weakening portion 123 can be designed according to the expected breaking force, breaking direction, and the structure of the battery.

[0111] It can be understood that by providing the weakening portion 123 on the lead-out piece 122 and locating it on the second side 110b of the cover plate body 110, the lead-out piece 122 can be bent, and the position and direction of the break or deformation of the lead-out piece 122 can be controlled, avoiding damage to the internal or external circuit of the battery, which helps to improve the safety, maintainability, and performance stability of the battery.

[0112] In some embodiments, as Figure 3 and Figure 4 shown, the height of the part of the lead-out piece 122 where the weakening portion 123 faces away from the first side 110a of the cover plate body 110 is greater than the thickness of the cover plate body 110 on at least one side of the through hole 111.

[0113] In the technical solution of the present application, the weakened portion 123 is a weak link on the lead-out piece 122, which is easily deformed or broken when subjected to a certain force or influence. This can be achieved by reducing the material thickness, changing the material type or introducing an incision. The first side 110a is a side of the cover body 110 related to the lead-out piece 122 and the weakened portion 123. The portion of the lead-out piece 122 at the weakened portion 123 that is away from the first side 110a of the cover body 110 is a specific area on the lead-out piece 122 located at the weakened portion 123 and away from the first side 110a of the cover body 110. The thickness of the cover body 110 on at least one side of the through hole 111 is the thickness of a certain area on the cover body 110 that is adjacent to or opposite to the through hole 111.

[0114] It can be understood that the height of the portion on the lead-out piece 122 associated with the weakened portion 123 and facing away from the first side 110a of the cover body 110 is greater than the thickness of an area on the cover body 110 adjacent to or opposite to the via 111, so as to provide sufficient strength, stability or space to accommodate other components or functions.

[0115] In some embodiments, Figures 3 - 5 As shown, the cover plate assembly 10 further includes: a seal 130 , which is clamped between the pole 120 and the cover plate body 110 and blocks the through hole 111 .

[0116] In the technical solution of the present application, the main function of the cover assembly 10 is to protect the internal structure of the battery and ensure the safe connection between the battery and the external circuit, including a cover body 110, a pole 120 and a seal 130. The cover body 110 is the main structure of the battery cover, usually made of metal or other conductive and corrosion-resistant materials, and is provided with one or more through holes 111, allowing the lead-out piece 122 to pass through to connect the internal and external circuits of the battery. The pole 120 includes a connecting portion 121 and a lead-out piece 122, which is located on one side of the cover body 110, corresponding to the electrode inside the battery, ensuring that the current can flow smoothly into and out of the battery. The connecting portion 121 is connected to the pole ear 210 of the battery cell 1. The lead-out piece 122 is a key part connecting the internal electrode of the battery and the external circuit. It passes through the through hole 111 of the cover body 110, one end is connected to the connecting portion 121, and the other end is connected to the external circuit or device.

[0117] The seal 130 is an important component of the cover assembly 10. Its main function is to ensure the sealing of the inside of the battery. It is usually made of rubber, silicone or other elastic materials, has good sealing and corrosion resistance, is clamped between the pole 120 and the cover body 110, and blocks the through hole 111 to prevent direct contact between the inside of the battery and the external environment.

[0118] The battery usually contains electrolyte inside. If leakage occurs, it will have a serious impact on the performance and safety of the battery. Through the tight plugging effect of the seal 130, it can effectively prevent the electrolyte inside the battery from leaking from the via hole 111. At the same time, during the operation of the battery, gas may be generated inside the battery, resulting in increased pressure. The seal 130 can withstand a certain pressure and maintain the stability of the internal pressure of the battery, preventing safety problems caused by excessive pressure. The seal 130 can also isolate moisture, dust and other impurities in the external environment, protecting the internal structure and circuit of the battery from damage.

[0119] It can be understood that through the collaborative action of components such as the cover plate assembly 10, the cover plate body 110, the pole column 120 and the seal 130, it provides a safe and stable connection and protection for the battery. At the same time, as a key component to ensure the internal sealing of the battery, the seal 130 plays a crucial role in the performance and safety of the battery.

[0120] In some embodiments, such as Figure 4 and Figure 5 as shown, the seal 130 includes: a first part 131 and a second part 132. The first part 131 is sleeved outside the lead-out piece 122 and at least partially located inside the via hole 111. The second part 132 is connected to the first part 131 and is clamped between the first side 110a of the cover plate body 110 and the connecting portion 121.

[0121] In the technical solution of the present application, the seal 130 is composed of a first part 131 and a second part 132. The first part 131 is sleeved outside the lead-out piece 122 and partially located inside the via hole 111. The second part 132 is connected to the first part 131 and is clamped between the first side 110a of the cover plate body 110 and the connecting portion 121, and there is a protrusion at the edge of the second part 132.

[0122] The protrusion at the edge of the second part 132 can increase the local strength of the second part 132, making it more robust when facing external pressure or impact. It can also form a closer contact with the cover plate body 110, thereby enhancing the sealing effect and preventing the leakage of liquid, gas or solid particles. At the same time, it can be used as a positioning or fixing structure to ensure that the seal 130 can be correctly aligned and placed during the assembly process. In some cases, the protrusion can be designed to match the grooves, holes or other structures on the cover plate body 110 or the connecting portion 121 to prevent the seal 130 from loosening or shifting during use.

[0123] It can be understood that through the structural configuration and installation method of the seal 130, the sealing performance can be enhanced, the structural stability can be improved, and it is convenient for installation and maintenance.

[0124] In some embodiments, such as Figures 3 - 5As shown, the cover plate assembly 10 further includes: an insulating member 140, which is installed between the lead-out piece 122 and the cover plate body 110.

[0125] In the technical solution of this application, the cover plate assembly 10 is a key component of the battery, used to ensure a stable connection between the inside of the battery and the external circuit, including: a cover plate body 110, a pole column 120, a seal 130, and an insulating member 140. A sunken groove 141 is provided on the second side 110b of the cover plate body 110, which can be used to accommodate other components, increase the structural strength, or improve the heat dissipation performance. One end of the lead-out piece 122 of the pole column 120 is connected to the connection part 121, and the other end is connected to the external circuit. At the same time, an insulating member 140 is installed between the lead-out piece 122 and the cover plate body 110. It is made of insulating materials such as plastic, rubber, or ceramic, has good electrical insulation performance and high-temperature resistance, provides electrical isolation, prevents accidental short circuits or electric shock hazards between the inside of the battery and the external circuit, and ensures the safety and stability of the battery.

[0126] It can be understood that the cover plate assembly 10 can not only ensure a stable connection between the inside of the battery and the external circuit, but also improve the safety and reliability of the battery through the insulating member 140 and the seal 130. At the same time, a sunken groove 141 is provided on the second side 110b of the cover plate body 110, which can increase the structural strength and improve the heat dissipation performance.

[0127] As Figures 3 - 5 shown, an embodiment of this application also provides a battery cell 1, including: a housing 30, a battery core 20, and a cover plate assembly 10. The battery core 20 is arranged inside the housing 30, and the cover plate assembly 10 is installed on the housing 30, and the connection part 121 is connected to the tab 210 of the battery core 20.

[0128] In the technical solution of this application, the battery cell 1 is the basic unit of the battery system, containing necessary components to store and release electrical energy, mainly including: a housing 30, a battery core 20, and a cover plate assembly 10. Among them, the housing 30 is the external protection structure of the battery cell 1, used to accommodate and protect the battery core 20 and the cover plate assembly 10, and is usually made of metal or other strong and corrosion-resistant materials to ensure that the battery cell 1 can work safely and stably under various environmental conditions. The battery core 20 is the core part of the battery cell 1, arranged inside the housing 30, used to store electrical energy and provide energy for the battery cell 1, and usually includes positive and negative electrodes and an electrolyte. Among them, the positive and negative electrodes conduct ion exchange through the electrolyte, thereby realizing the storage and release of electrical energy. The cover plate assembly 10 is an important component of the battery cell 1, installed on the housing 30, and connected to the tab 210 of the battery core 20, used to ensure a stable connection between the inside of the battery and the external circuit.

[0129] The main components of the cover plate assembly 10 include the pole column 120. The pole column 120 includes a connecting portion 121 and a lead-out piece 122. The connecting portion 121 is connected to the tab 210 of the battery cell 20 to ensure the smooth transmission of electric energy. One end of the lead-out piece 122 is connected to the connecting portion 121, and the other end contacts the external circuit through the through-hole 111 of the battery cover plate, and is used to lead out the electric energy inside the battery cell 20 to the external circuit.

[0130] The housing 30 can protect the battery cell 20 and the cover plate assembly 10 from external environmental interference and damage, improving the safety of the battery module 1. The battery cell 20, as the energy storage part of the battery module 1, can increase the energy density of the battery module 1, enabling the battery module 1 to store more electric energy under the same volume or weight. The cover plate assembly 10 can ensure a stable connection between the battery cell 20 and the external circuit, reducing the risk of performance degradation or failure caused by poor contact or other reasons.

[0131] It can be understood that the battery module 1 is structurally compact, has high safety, high energy density, good stability, and is easy to maintain, and is suitable for various application scenarios that require high-performance batteries.

[0132] Such as Figure 6 and Figure 7 As shown, the embodiment of the present application also provides a battery, including: a plurality of battery modules 1, and the battery modules 1 are connected in a lap joint manner through the lead-out pieces 122.

[0133] In the technical solution of the present application, the battery is composed of a plurality of battery modules 1 and is connected in a lap joint manner through the lead-out pieces 122 to achieve effective transmission and sharing of electric energy. The battery module 1 is the basic unit that composes the battery, and each battery module 1 has an independent ability to store and output electric energy. It is usually composed of parts such as a housing 30, a battery cell 20, and a cover plate assembly 10. The battery cell 20 is the core part of the battery module 1 for storing electric energy, is located inside the housing 30, and is connected to the external circuit through the cover plate assembly 10. The pole plate of the cover plate assembly 10 includes a connecting portion 121 and a lead-out piece 122. The lead-out piece 122 usually has good electrical conductivity and is used to achieve the transmission of electric energy between the battery modules 1.

[0134] The battery modules 1 are connected in a lap joint manner through the lead-out pieces 122 to form a series or parallel circuit structure. Series connection can increase the total voltage of the battery and is suitable for application scenarios that require high-voltage output. Parallel connection can increase the total capacity of the battery and is suitable for application scenarios that require long-term operation or high energy density.

[0135] It can be understood that by combining a plurality of battery modules 1, the total energy density of the battery can be increased. At the same time, the lap joint connection method of the lead-out pieces 122 can ensure the effective transmission of electric energy, and is also beneficial to improving the stability and safety of the entire battery.

[0136] An embodiment of the present application also provides an electrical device, including: a battery for supplying electrical energy to the electrical device.

[0137] In the technical solution of the present application, the electrical device is a device or system that relies on electrical energy to operate. The battery, as the main power source of the electrical device, is connected to other parts of the electrical device through an output port to provide stable and reliable electrical energy supply. The battery is composed of multiple battery cells 1, and the battery cells 1 form a whole through a specific connection method, such as series or parallel, to provide the required voltage and capacity.

[0138] In addition to the battery, the electrical device may also include other components or systems for realizing its specific functions, such as a control circuit, a motor, a sensor, etc., which are driven and controlled by electrical energy to realize various functions of the electrical device.

[0139] It can be understood that the electrical device uses the battery as its main electrical energy source, and has the advantages of continuous power supply, good stability, high portability, energy conservation and environmental protection, and is applicable to various devices and systems that require electrical energy drive.

[0140] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0141] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0142] In the description of the present application, the "first feature", "second feature" may include one or more of such features.

[0143] In the description of the present application, "a plurality of" means two or more.

[0144] In the description of the present application, that the first feature is "above" or "below" the second feature may include direct contact between the first and second features, or may include that the first and second features are not in direct contact but in contact through additional features therebetween.

[0145] In the description of the present application, that the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0146] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0147] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pole, applied to a battery cell, characterized in that: include: A connecting portion, the connecting portion having a connecting surface for connecting to a tab of the battery cell; A lead-out piece is connected to the connection portion, the lead-out piece is sheet-shaped, and the area of ​​the cross section parallel to the connection surface is smaller than the area of ​​the cross section of the connection portion parallel to the connection surface.

2. The pole according to claim 1, characterized in that: The lead-out piece is provided with a weakened portion distributed along the width direction of the lead-out piece, and the rigidity of the weakened portion is smaller than the rigidity of other areas of the lead-out piece.

3. The pole according to claim 2, characterized in that: The thickness of the weakened portion is smaller than the thickness of other areas of the lead-out plate; or, The weakened portion includes a weakened groove provided on the surface of the lead-out piece; or, The material hardness of the weakened portion is smaller than the material hardness of other regions of the lead-out plate.

4. The pole according to any one of claims 1 to 3, characterized in that: The lead-out piece is provided with a positioning portion.

5. The pole according to any one of claims 1 to 3, characterized in that: The thickness of the lead-out sheet is L1, which satisfies: 0.2 mm ≤ L1 ≤ 2 mm; and / or, The width of the lead-out piece is L2, which satisfies: 5mm≤L2≤200mm.

6. A cover plate assembly, characterized in that: Applied to a battery, the cover assembly comprises: A cover plate body, wherein the cover plate body is provided with a through hole; According to any one of claims 1 to 5, the connecting portion is located on the first side of the cover body, and the lead-out piece passes through the through hole.

7. The cover plate assembly according to claim 6, characterized in that: In the case where the lead-out piece is provided with a weakened portion, the weakened portion is located at the second side of the cover plate body.

8. The cover plate assembly according to claim 7, characterized in that: A height of the lead-out piece at a portion of the weakened portion away from the first side of the cover body is greater than a thickness of the cover body at least on one side of the via hole.

9. The cover plate assembly according to any one of claims 6 to 8, characterized in that: Also includes: A sealing member is clamped between the pole and the cover plate body and blocks the through hole.

10. The cover plate assembly according to claim 9, characterized in that: The sealing member comprises: The first part is sleeved outside the lead-out sheet and at least partially located in the via hole; The second part is connected to the first part and clamped between the first side of the cover body and the connecting portion.

11. The cover plate assembly according to any one of claims 6 to 8, characterized in that: Also includes: An insulating member is installed between the lead-out piece and the cover plate body.

12. A battery cell, characterized in that: include: case; A battery cell, disposed in the housing; The cover plate assembly as described in any one of claims 6 to 11 is mounted on the shell, and the connecting portion is connected to the tab of the battery cell.

13. A battery, characterized in that: include: A plurality of battery cells as claimed in claim 12, wherein the battery cells are connected by overlapping with each other through the lead-out pieces.

14. An electrical device, characterized in that: include: The battery as claimed in claim 13, wherein the battery is used to provide electrical energy to the electrical device.

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