Electric connection element and battery

Abstract

The utility model relates to the technical field of batteries, in particular to an electric connection element and a battery. The connecting piece and the pole column are integrally formed, the connecting piece is provided with two pole lug welding areas, and the two pole lug welding areas are located on the two sides of the pole column respectively; the tab welding area is bent towards the direction close to the pole, so that a sunken table part is formed on one side, opposite to the pole, of the tab welding area; the connecting piece is provided with a positioning part for positioning the relative position of the connecting piece and the battery cover plate; the electric connection element provided by the utility model can continuously keep accurate positioning during batch production, and can enlarge the bending space of the tab and ensure the product quality.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to an electrical connection element and a battery. Background Art

[0002] The basic structure of a battery includes components such as ear tabs, terminal posts, connecting pieces, and lower plastics. The connecting piece is a key component connecting the ear tab and the terminal post, and is usually made of a highly conductive metal (such as copper or aluminum). The lower plastics are generally arranged on one side of the connecting piece and under the top cover plate of the battery, and are used to provide additional structural support and protection for the connecting piece. Now, in order to increase the battery capacity, it is necessary to gradually reduce the height of the lower plastics to increase the internal space of the battery core. However, this will reduce the bending space of the ear tabs, making it difficult to bend the ear tabs to the appropriate position, thus affecting the process of inserting the entire wound core (battery core) into the shell and resulting in difficulties in inserting the wound core into the shell.

[0003] In addition, in the prior art, in order to ensure the accurate positioning of the connecting piece, a specially designed auxiliary tooling is usually required; although the dimensions and positions of the positioning structure of the auxiliary tooling are very accurate during the initial production, with the extension of the service time, the accuracy of its positioning structure will gradually decrease due to wear, which not only affects the positioning accuracy of the connecting piece and the terminal post, but also causes the positioning effect of the auxiliary tooling not to be continuously maintained; to solve the above problems, it is necessary to optimize and improve the prior art. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide an electrical connection element and a battery with accurate positioning and capable of increasing the bending space of the ear tabs.

[0005] To achieve the above object and other related objects, the present utility model provides an electrical connection element, including:

[0006] A terminal post; and a connecting piece integrally formed with the terminal post, the connecting piece is provided with two ear tab welding areas, and the two ear tab welding areas are respectively located on both sides of the terminal post;

[0007] The ear tab welding area is bent towards the direction close to the terminal post, so that a sunken part is formed on the side opposite to the terminal post where the ear tab welding area is located;

[0008] The connecting piece is provided with a positioning portion for positioning the relative position of the connecting piece and the battery cover plate.

[0009] As an optional embodiment of the present utility model, the connecting piece is of a rectangular structure, the positioning portion is arranged on the long edge of the rectangular connecting piece, and the two ear tab welding areas are arranged along the long side direction of the connecting piece.

[0010] As an optional embodiment of the present utility model, a pole column area is provided between the two pole tab welding areas of the connecting piece; the pole column is arranged at the center of the pole column area, and the two pole tab welding areas are symmetrically arranged with respect to the pole column area or the pole column.

[0011] As an optional embodiment of the present utility model, the positioning portion protrudes from the edge of the connecting piece in a direction away from the pole column.

[0012] As an optional embodiment of the present utility model, the positioning portion protruding from the edge of the connecting piece is a groove structure.

[0013] As an optional embodiment of the present utility model, at least two positioning portions are provided, and the positioning portions are in the shape of blind holes or through holes.

[0014] As an optional embodiment of the present utility model, any one of the positioning portions is arranged at the edge of the connecting piece and is recessed from the edge of the connecting piece toward the inner side of the connecting piece having the pole column.

[0015] As an optional embodiment of the present utility model, the ratio of the length to the width of the connecting piece ranges from 1.5 to 5, and / or the ratio of the size of the pole column area to the size of the pole tab welding area along the length direction of the connecting piece ranges from 0.5 to 3.

[0016] As an optional embodiment of the present utility model, one of the four corners of the rectangular connecting piece has a shape different from that of the other three corners.

[0017] To achieve the above and other related purposes, the present utility model provides a battery including the electrical connection element described above.

[0018] In summary, in this case, by integrally forming the pole column and the connecting piece, the welding process of the pole column and the connecting piece in the traditional battery is omitted, the production process is simplified, the manufacturing cost and complexity are reduced, and at the same time, the number of welding points is reduced, and the connection failure and instability are reduced. The integrated design not only reduces the contact resistance in current conduction, improves the overall electrical performance of the battery, but also provides a better heat conduction path, promotes effective heat dissipation, reduces the volume and weight of the battery, and thus reduces the production cost. In this case, by arranging the two pole tab welding areas on both sides of the pole column respectively, and making the center distance between the pole tabs equal to or close to the center distance of the pole column, the current path and resistance are reduced, and further the size and weight of the connecting piece are reduced. A sunk portion is formed on the side opposite to the pole tab welding area and the pole column, expanding the bending space of the pole tab to ensure the normal bending of the pole tab when the height of the lower plastic is reduced; while the positioning portion is directly integrated on the connecting piece, reducing the dependence on external auxiliary tooling, reducing the risk of positioning error, ensuring the relative position accuracy during the assembly process and the stability during the production process, and improving the assembly quality, overall performance and service life of the battery. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a front three-dimensional structure schematic diagram of an electrical connection element in an embodiment of the present invention;

[0021] Figure 2 It is a back three-dimensional structure schematic diagram of an electrical connection element in an embodiment of the present invention;

[0022] Figure 3 It is a side sectional view of an electrical connection element in an embodiment of the present invention;

[0023] Figure 4 It is a partial positioning connection schematic diagram of an electrical connection element and a battery end cover in an embodiment of the present invention;

[0024] Figure 5 It is a structure schematic diagram of a connecting piece in the prior art;

[0025] Figure 6 For Figure 4 One of the structural schematic diagrams during the improvement process of the electrical connection element to this case;

[0026] Figure 7 It is a structural schematic diagram of an electrical connection element in another embodiment of the present invention;

[0027] Figure 8 It is a structural schematic diagram of an electrical connection element in still another embodiment of the present invention;

[0028] Figure 9 It is a dimension marking diagram of an electrical connection element in an embodiment of the present invention;

[0029] Figure 10 It is a structural schematic diagram of an electrical connection element with a chamfer in an embodiment of the present invention;

[0030] Element number description: terminal post 1, connecting piece 2, tab welding area 21, terminal post area 22, counterbore part 23, positioning part 24, groove structure 241, chamfer 25, battery cover plate 3, positioning member 31. Detailed implementation manners

[0031] The following describes the embodiments of the present utility model through specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present utility model are for describing specific implementation manners and are not intended to limit the protection scope of the present utility model. The test methods without specific conditions noted in the following embodiments are generally carried out under conventional conditions or according to the conditions recommended by each manufacturer.

[0032] Please refer to Figures 1 to 10 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not intended to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have a technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" used in this specification are only for the convenience of clear narration and are not intended to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present utility model can be implemented.

[0033] When an embodiment gives a numerical range, it should be understood that unless otherwise specified in the present utility model, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present utility model, based on the understanding of those skilled in the art of the prior art and the description of the present utility model, can also use any methods, devices, and materials similar or equivalent to the methods, devices, and materials described in the embodiments of the present utility model to implement the present utility model.

[0034] The basic structure of the battery includes:

[0035] Tab: The tab is the output terminal of the battery and is usually made of metal, such as copper or aluminum. They are connected to the terminal 1 of the battery and are electrically connected to electrical equipment through the connecting piece 2; tabs are generally divided into positive tabs and negative tabs, and the materials of the two are different to be correctly connected to the circuit; positive tabs usually use aluminum materials, while negative tabs use nickel or copper materials; the design and quality of the tabs directly affect the internal resistance and heat dissipation performance of the battery.

[0036] Terminal 1: Terminal 1 is the main electrode inside the battery and is the connection point for the positive and negative electrodes. The chemical reaction of the battery occurs on Terminal 1, generating an electric current. Terminal 1 is usually made of lead, lead alloy, or other chemical materials to meet the requirements of different types of batteries.

[0037] Connecting piece 2: Connecting piece 2 is an important component used to connect the tab of the battery and Terminal 1. It is usually made of highly conductive metal materials such as copper or aluminum to ensure that the electric current can flow smoothly from Terminal 1 to the tab, while maintaining the stability and safety of the battery.

[0038] Lower plastic: The lower plastic generally uses materials with high temperature resistance and chemical corrosion resistance, such as PP (polypropylene), PE (polyethylene), etc. The lower plastic is located below the top cover plate of the battery, providing additional structural support and protection. It helps to fix and support Terminal 1 and connecting piece 2, while reducing the impact of the external environment on the inside of the battery; the lower plastic is usually made of plastic or other non-conductive materials to prevent electrode short circuit or other accidents.

[0039] Please refer to Figures 1 - 2 , the present utility model provides an electrical connection element, including Terminal 1; and a connecting piece 2 integrally formed with the Terminal 1, the connecting piece 2 is provided with two tab welding areas 21, and the two tab welding areas 21 are respectively located on both sides of the Terminal 1;

[0040] It should be noted that both the Terminal 1 and the connecting piece 2 are made of conductive materials; the Terminal 1 and the connecting piece 2 are integrally formed, for example, by machining, casting, etc. The terminal area 22 is the area where the connecting piece 2 and the Terminal 1 are integrally connected. Generally, the Terminal 1 is in a cylindrical structure and is vertically connected to the connecting piece 2. The tab welding areas 21 are used to weld and connect the tabs, for example, by ultrasonic welding or laser welding. The two tab welding areas 21 are respectively located on both sides of the Terminal 1, that is, in the axial direction of the Terminal 1, the two tab welding areas 21 are always located on both sides of the Terminal 1, that is, the Terminal 1 is always in the position between the connection lines of the two tab welding areas 21.

[0041] Please refer to Figures 1 - 2, in this case, by integrally forming the terminal post 1 and the connecting piece 2, on the one hand, the welding process between the terminal post 1 and the connecting piece 2 in the traditional battery can be omitted, which not only simplifies the production process, but also reduces the manufacturing cost and complexity. Reducing the welding points also reduces potential connection failures and instabilities; at the same time, the integrated design can reduce the contact resistance in current conduction and improve the overall electrical performance of the battery; the integration of the terminal post 1 and the connecting piece 2 avoids the resistance loss caused by multi-layer connections, helps to improve the conductive efficiency of the battery, and ensures stable current transmission; the integrated design can provide a better heat conduction path and help to dissipate heat more effectively; in addition, the integral forming helps to reduce additional connection materials and components, thereby reducing the volume and weight of the battery, and further reducing the production cost. In this case, by making the two tab welding areas 21 located on both sides of the terminal post 1 respectively, the center distance of the tabs is made equal to or close to the center distance of the terminal post 1, which helps to reduce the current path between the terminal post 1 and the tabs, thereby helping to reduce the resistance, and greatly reducing the size and weight of the connecting piece 2, which helps to control the cost.

[0042] Further, please refer to Figures 1 - 3 , the tab welding area 21 is bent towards the terminal post 1, so that a sunk portion 23 is formed on the side of the tab welding area 21 opposite to the terminal post 1;

[0043] It should be noted that the tab welding area 21 is bent towards the terminal post 1, that is, the tab welding area 21 protrudes towards the direction where the terminal post 1 is located, Figure 1 in which the terminal post 1 faces upward, and the tab welding area 21 is also bent upward; the side opposite to the terminal post 1 is also the side of the connecting piece 2 that is not connected to the terminal post 1, and the tab welding area 21 forms a sunk portion 23 on this side. The tab welding area 21 is used to connect the tabs, but due to the reduction of the height of the lower plastic, the height of the terminal post area 22 is reduced. When the lower surface of the terminal post area 22 connected to the tabs is on the same plane, the bending space of the tabs will be reduced, thus affecting the bending of the tabs, and further causing difficulty in inserting the core into the case; therefore, in this case, by forming a sunk portion 23 on the side of the tab welding area 21 opposite to the terminal post 1, the sunk portion 23 can expand the bending space of the tabs, so that when the sunk portion 23 follows the reduction of the height of the lower plastic, due to the height difference between the sunk portion 23 and the tab welding area 21, the bending space of the tabs will not be reduced or will not be reduced too much, so as to ensure the normal bending of the tabs; more specifically, as Figure 1 shown, along the axial direction of the terminal post 1, taking the side surface of the connecting piece 2 connected to the terminal post 1 as the upper surface and the other surface opposite to this upper surface as the lower surface, the lower surface of the tab welding area 21 is higher than the lower surface of the terminal post area 22, which can expand the bending space of the tabs.

[0044] Further, please refer toFigures 1 - 2 4. The connecting piece 2 is provided with a positioning portion 24 for positioning the relative position of the connecting piece 2 and the battery cover plate 3.

[0045] It should be noted that the positioning portion 24 is directly integrated on the connecting piece 2, which can effectively reduce the dependence on external auxiliary tooling and reduce the positioning error caused by the accuracy problem of the auxiliary tooling. In this way, the positioning portion 24 can not only ensure the relative position accuracy between the connecting piece 2 and the battery cover plate during the assembly process, but also maintain a stable positioning effect during the production process, reducing the risk of positioning accuracy decline caused by long-term use, such as the positioning error problem that may be brought by the wear of the positioning structure of the auxiliary tooling during long-term use, so as to ensure the consistency and reliability in mass production. By optimizing the structural design of the connecting piece 2, the positioning portion 24 not only improves the assembly quality of the battery, but also enhances the overall performance and service life of the battery product.

[0046] In this case, the tab can be connected to the tab welding area 21 by ultrasonic welding or laser welding to further increase the bending space of the tab.

[0047] It should be noted that the rectangle in this application refers to a structure that is approximately rectangular rather than a strictly rectangular shape, where the rectangle includes a rectangle and a square.

[0048] As an optional embodiment of this case, please refer to Figures 1 - 2 , the connecting piece 2 is of a rectangular structure, the positioning portion 24 is arranged on the long side edge of the rectangular connecting piece 2, and the two tab welding areas 21 are arranged along the long side direction of the connecting piece 2.

[0049] It should be noted that by making the connecting piece 2 of a rectangular structure and arranging the pole column area 22 and the two tab welding areas 21 along the length direction of the connecting piece 2, it is beneficial to further shorten the current path between the pole column area 22 and the tab welding areas 21, ensure that the conduction of current from the pole column area 22 to the two tab welding areas 21 is more uniform, help reduce resistance and current loss, and improve the overall electrical performance of the battery. The rectangular connecting piece 2 helps the tab welding area 21 to bend towards the direction close to the pole column 1, and form a sunken portion 23 on the side of the tab welding area 21 opposite to the pole column 1. For example, the rectangular structure of the connecting piece 2 is easy to be produced and processed by standard manufacturing processes. The rectangular design of the connecting piece 2 makes processes such as cutting, stamping and die forming become simpler and more consistent, improving production efficiency. Aligning the pole column area 22 and the tab welding areas 21 along the length direction of the connecting piece 2 makes it easier to ensure the docking accuracy of each area during assembly, simplifies the assembly process, reduces assembly errors, and improves the consistency of the overall product.

[0050] As an optional embodiment of this case, please refer toFigures 1 - 2 A pole area 22 is provided between the two pole tab welding areas 21 of the connecting piece 2; the pole 1 is arranged at the center of the pole area 22, and the two pole tab welding areas 21 are symmetrically arranged about the pole area 22 or the pole 1.

[0051] It should be noted that the central design of the pole 1 can balance the stress on the connecting piece 2 and reduce the stress concentration caused by the eccentric load, thereby improving the stability and durability of the structure. The symmetrically arranged pole ear welding area 21 ensures the uniformity of the distribution of welding points, helps to optimize the welding process, reduce welding stress concentration, and improve welding quality and reliability. In addition, the symmetrical layout of the pole ear welding area 21 makes the current distribution more balanced, reduces resistance and heat, and improves the overall efficiency and safety of the battery system. The central position of the pole 1 optimizes space utilization, makes the connecting piece 2 structure more compact, and helps to improve the energy density of the battery.

[0052] like Figures 1 - 2 As shown in Figure 4, as an optional embodiment of the present invention, the positioning portion 24 is protruded from the edge of the connecting piece 2 in a direction away from the pole 1; through this design, a more intuitive and reliable positioning reference can be provided during the assembly process, reducing positioning errors, which is conducive to improving the consistency and accuracy of assembly, especially in large-scale production, and can significantly reduce the production of defective products. In particular, the protruding positioning portion 24 provides a clear visual and physical reference for assembly, which helps to quickly and accurately align the corresponding components, which can not only reduce assembly time and improve production efficiency, but also ensure that the pole 1 body will not be displaced during the assembly process, thereby improving the consistency and reliability of the battery.

[0053] like Figures 1 - 2 As shown in Figure 4, as an optional embodiment of the present invention, the positioning portion 24 protruding from the edge of the connecting piece 2 is a groove structure 241. It should be noted that the positioning stability can be further enhanced through the design of the groove structure 241; the groove structure 241 can be a rectangular groove, a circular arc groove, or a U-shaped groove. It should be understood that the shape of the groove structure 241 should be matched with the shape of the positioning structure set on the lower plastic of the battery cover as much as possible to improve the positioning accuracy; for example, Figure 4 As shown, the battery cover plate 3 is provided with a positioning member 31 which matches and limits the positioning portion 24 , and the positioning member 31 may be a cylindrical structure.

[0054] As an optional embodiment of this case, please refer to Figure 7 The positioning method of this embodiment is different from the above positioning method. Specifically, at least two positioning portions 24 are provided, and the positioning portions 24 are in the shape of blind holes or through holes.

[0055] It should be noted that setting multiple positioning parts 24 can provide multiple positioning points, thereby improving the stability and positioning accuracy of the relative position between the connecting piece 2 and the battery cover plate. The multiple positioning points help to better control and calibrate the deviations that may occur during the assembly process. The design of blind holes or through holes helps to more easily align and fix the connecting piece 2 during the assembly and maintenance processes, improving the assembly efficiency, and at the same time facilitating inspection and replacement. At the same time, designing the positioning part 24 as a blind hole or a through hole is beneficial to the processing and forming of the positioning part 24. Preferably, the positioning part 24 is in the shape of a through hole, which is beneficial to reducing the weight of the connecting piece 2 and the amount of required material, and further beneficial to reducing the weight of the overall battery and the cost.

[0056] As an optional embodiment of this case, please refer to Figure 8 , the positioning method of this embodiment is different from the above positioning method. Specifically: any one of the positioning parts 24 is arranged on the edge of the connecting piece 2 and is recessed from the edge of the connecting piece 2 towards the inner side of the connecting piece 2 having the pole 1.

[0057] It should be noted that the positioning part 24 recessed from the edge of the connecting piece 2 towards the inner side of the connecting piece 2 having the pole 1 is in the shape of a U, an arc, a square groove, or other shapes that meet the positioning requirements. The positioning part 24 is arranged on the edge of the connecting piece 2, which can maximize the utilization efficiency of the surface of the connecting piece 2 and leave more space for the pole 1 and other key components. This layout helps to optimize the internal structure configuration of the battery, reduce the interference between components, and improve the stability of the battery performance. At the same time, the positioning part 24 is recessed from the edge of the connecting piece 2 towards the inner side of the connecting piece 2 having the pole 1, which is beneficial to reducing the weight and material usage of the connecting piece 2, and is also beneficial to the processing and forming of the positioning part 24 itself, and further beneficial to the weight reduction and cost control of the battery. The positioning part 24 arranged on the edge of the connecting piece 2 is also beneficial to the assembly of electrical connection components and can improve the positioning efficiency during assembly because the positioning of two recessed structures is more visual and easier to operate than the positioning of two holes.

[0058] As one of the optional embodiments of this case, the ratio range of the length to the width of the connecting piece 2 is 1.5 to 5. Specifically, as Figure 9 shown, the ratio range of the long side dimension L to the wide side dimension W is between 1.5 and 5.

[0059] It should be noted that by making the ratio of the length dimension of the long side L to the width dimension of the wide side W between 1.5 and 5, it helps to enhance its mechanical strength and stability, helps to disperse the force applied to the connecting piece 2, and reduces the risk of bending and deformation; this size ratio design enables a higher overall utilization of the connecting piece 2 when connecting the pole column 1 and the pole ear, which is beneficial to a more reasonable layout of the pole ear welding area 21 and the pole column 1; at the same time, the connecting piece 2 with a size ratio between 1.5 and 5 performs excellently in heat dissipation performance, helps to evenly distribute heat, and reduces the risk of local overheating.

[0060] As an optional embodiment of this case, as Figure 9 shown, the dimensions of the pole column area 22 and the pole ear welding area 21 along the width direction of the connecting piece 2 are equal, that is, the dimensions of W1 and W2 are equal, which can ensure the uniform distribution and symmetric conduction of current on the connecting piece 2. It not only optimizes the current path, reduces resistance, improves the electrical efficiency of the battery, but also enhances the mechanical stability of the connecting piece 2 and reduces the risk of deformation caused by uneven stress. In addition, the equal dimensions help to simplify the manufacturing and assembly processes, ensure the consistency of each area, and improve the stability and reliability of the overall product.

[0061] As an optional embodiment of this case, the ratio range of the dimensions of the pole column area 22 and the pole ear welding area 21 along the length direction of the connecting piece 2 is between 0.5 and 3, as Figure 9 shown, that is, the ratio range of the dimension L2 to the dimension L1 is between 0.5 and 3, which helps to optimize the mechanical strength of the structure while ensuring the uniform distribution of current; it is beneficial for the pole column area 22 and the pole ear welding area 21 to maintain a suitable size ratio, and avoid one of the pole column area 22 and the pole ear welding area 21 being too large or too small, which may affect the performance and manufacturing cost of the connecting piece 2.

[0062] As an optional embodiment of this case, as Figures 1 - 2 or Figure 8As shown, the connecting piece 2 has a rectangular structure, and the positioning portion 24 is provided in the middle of the edge of the rectangular connecting piece 2. It should be noted that the rectangular structure provides good mechanical strength and stability, and can effectively withstand the stresses that may occur during assembly and use; the positioning portion 24 is provided in the middle of the edge of the connecting piece 2, which can provide accurate positioning during installation, so that the connecting piece 2 can be more stably fixed in the battery, ensuring the accuracy and consistency of the assembly; the positioning design in the middle of the edge effectively reduces the risk of external interference and damage that the positioning portion 24 may receive, while maintaining the integrity of the edge of the connecting piece 2 and avoiding weak points at the corners. At the same time, the positioning portion 24 is located in the middle of the edge of the connecting piece 2, so it is relatively close to the pole region 22, maximizing the effective surface area of the connecting piece 2 and leaving more space for other key components. For example, more space is reserved for the tab welding area 21, and structural interference between the subsequent welded tab and other structures is eliminated.

[0063] As an alternative embodiment of this case, one of the four corners of the rectangular connecting piece 2 has a different shape from the other three corners. Specifically, as Figure 10 shown, one of the four corners of the connecting piece 2 is a cut corner 25, and the other three corners are arc chamfer structures. The combination of the cut corner 25 and the arc chamfer can provide obvious visual and tactile differences, enabling users or automated assembly systems to easily identify the correct orientation of the connecting piece 2. This intuitive identification can reduce the possibility of assembly errors; through the asymmetric design, especially the introduction of the cut corner 25, it can be ensured that the connecting piece 2 can only be installed in the correct direction during assembly. This restrictive design helps to prevent assemblers or systems from installing the connecting piece 2 in the wrong direction, thereby improving the assembly efficiency and quality. The selection of the cut corner 25 and the arc chamfer structure may also be related to the specific function of the connecting piece 2. For example, the cut corner 25 can be used for specific mechanical locking or alignment functions, while the arc chamfer can provide a comfortable feel or compatibility with other components.

[0064] To achieve the above and other related purposes, the present utility model provides a battery cover assembly including the above-mentioned electrical connection element, so that the battery cover assembly having this electrical connection element is also within the protection scope of this case.

[0065] To achieve the above and other related purposes, the present utility model provides a battery including the above-mentioned electrical connection element, so that the battery having this electrical connection element is also within the protection scope of this case.

[0066] To achieve the above and other related purposes, the present utility model provides an electronic device including the above-mentioned battery, so that the electronic device having this battery is also within the protection scope of this case.

[0067] In this case, by arranging the pole column 2 on the upper surface of the pole column area 11 and making the lower surface of the pole column area 11 and the lower surface of the tab welding area 12 located in different planes, a series of problems can be solved. Under the background of increasing the battery capacity, in order to increase the internal space of the battery cell, the height of the lower plastic is reduced, resulting in a reduction in the bending space of the tab, affecting the bending of the tab, and further making it difficult to insert the wound core into the case. In this case, a positioning portion 111 is provided on the pole column area 11, so that during battery assembly, the electrical connection element can maintain the positioning accuracy for a long time, and the problem of decreasing positioning accuracy caused by a series of reasons such as wear and deformation during the use of the fixture can be solved, thus ensuring the positioning and installation accuracy of the electrical connection element.

[0068] In summary, the present utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and practical significance.

[0069] Throughout the specification, reference to "an embodiment", "embodiment" or "specific embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention and not necessarily in all embodiments. Thus, the appearances of the phrases "in an embodiment", "in an embodiment" or "in a specific embodiment" in different places throughout the specification are not necessarily referring to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined in any suitable manner with one or more other embodiments. It should be understood that other variations and modifications of the embodiments of the invention described and shown herein may be made in accordance with the teachings herein and will be considered part of the spirit and scope of the present invention.

[0070] The above description of the embodiments shown in the present invention (including what is described in the abstract of the specification) is not intended to be exhaustive or to limit the present invention to the precise forms disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, as will be recognized and understood by those skilled in the art, various equivalent modifications are within the spirit and scope of the present invention. As noted, these modifications can be made to the present invention in accordance with the above description of the embodiments of the present invention, and these modifications will be within the spirit and scope of the present invention.

[0071] The above embodiments are only illustrative of the principles and effects of the present utility model and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An electrical connection element, characterized in that: include: Pole; as well as A connecting piece integrally formed with the pole, the connecting piece being provided with two pole lug welding areas, the two pole lug welding areas being respectively located on two sides of the pole; The pole tab welding area is bent toward the direction close to the pole, so that the pole tab welding area and the side opposite to the pole form a sunken platform; The connecting piece is provided with a positioning portion for positioning the relative position of the connecting piece and the battery cover plate.

2. The electrical connection element according to claim 1, characterized in that The connecting piece is a rectangular structure, the positioning portion is arranged on the long edge of the rectangular connecting piece, and the two tab welding areas are arranged along the long side direction of the connecting piece.

3. The electrical connection element according to claim 1, characterized in that A pole region is provided between the two pole lug welding regions of the connecting piece; the pole is arranged at the center of the pole region, and the two pole lug welding regions are symmetrically arranged about the pole region or the pole.

4. The electrical connection element according to claim 1, characterized in that The positioning portion is protruded from the edge of the connecting piece in a direction away from the pole.

5. The electrical connection element according to claim 4, characterized in that The positioning portion protruding from the edge of the connecting piece is a groove structure.

6. The electrical connection element according to claim 1, characterized in that At least two positioning parts are provided, and the positioning parts are in the shape of blind holes or through holes.

7. The electrical connection element according to claim 1, characterized in that Any of the positioning portions is arranged at the edge of the connecting piece and is recessed from the edge of the connecting piece toward the inner side of the connecting piece where the pole is located.

8. The electrical connection element according to claim 3, characterized in that The ratio of the length to the width of the connecting piece is in the range of 1.5 to 5, and / or the ratio of the dimensions of the pole region and the pole tab welding region along the length direction of the connecting piece is in the range of 0.5 to 3.

9. The electrical connection element according to claim 1, characterized in that: The shape of one of the four corners of the rectangular connecting piece is different from the shape of the other three triangles.

10. A battery comprising the electrical connecting element according to any one of claims 1 to 9.

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