Pole assemblies, energy storage devices and electrical equipment

Abstract

The utility model discloses a pole assembly, an energy storage device, and an electrical device. The pole assembly includes: a first metal layer; a second metal layer, the second metal layer is connected to the first metal layer, and a positioning blind hole is formed on the surface of the second metal layer away from the first metal layer, and the positioning blind hole is used to position the pole assembly when the pole assembly is processed by a stamping process. In the above-mentioned pole assembly, the positioning blind hole can be used to position the pole assembly when the pole assembly is manufactured by a stamping process, so that the pole assembly can be manufactured by a stamping process, which improves efficiency and reduces costs, and is not easy to form metal debris that is harmful to the internal environment of the energy storage device.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an electrode assembly, an energy storage device, and an electrical appliance. Background Technology

[0002] A rechargeable battery, also known as a secondary battery or storage battery, is a battery that can be recharged after being discharged to reactivate its active materials and continue to be used. The recyclable nature of rechargeable batteries has made them a primary power source for electrical devices. As the demand for rechargeable batteries increases, people have higher requirements for their safety and cost-effectiveness.

[0003] In secondary batteries, the negative electrode post is typically made of aluminum and copper materials joined together by friction welding, or manufactured using a copper-aluminum composite plate turning process. However, friction welding and turning processes are inefficient, costly, and prone to generating metal debris that is harmful to the internal environment of the secondary battery. Utility Model Content

[0004] This utility model provides a pole assembly, an energy storage device, and an electrical device.

[0005] One embodiment of the present invention includes a pole assembly comprising:

[0006] First metal layer;

[0007] A second metal layer is connected to the first metal layer, and a positioning blind hole is formed on the surface of the second metal layer away from the first metal layer. The positioning blind hole is used to position the pole assembly when the pole assembly is processed by stamping.

[0008] In the aforementioned electrode assembly, the electrode assembly can be positioned through the positioning blind hole during the stamping process, which enables the electrode assembly to be manufactured through the stamping process, improving efficiency and reducing costs, and also making it less likely to generate metal debris that is harmful to the internal environment of the energy storage device.

[0009] In some embodiments, the first metal layer is a copper layer and the second metal layer is an aluminum layer.

[0010] In this way, the electrode assembly can be applied to the negative electrode.

[0011] In some embodiments, the positioning blind hole is a conical blind hole, and the pole assembly is stamped from a composite plate formed by the first metal layer and the second metal layer.

[0012] This can improve the manufacturing efficiency of the pole piece assembly.

[0013] In some embodiments, the interface between the first metal layer and the second metal layer includes an interface portion corresponding to the positioning blind hole, the shape of which is adapted to the shape of the positioning blind hole.

[0014] This can improve the protective effect on the first metal layer.

[0015] In some embodiments, the first metal layer includes a first body portion and a first flange portion, the first flange portion being circumferentially connected to one end of the first body portion along the pole assembly, the first flange portion protruding relative to the first body portion, and the second metal layer being connected to the side of the first flange portion away from the first body portion.

[0016] This improves the efficiency of assembling the pole assembly to the end cap.

[0017] In some embodiments, the first metal layer includes a first body portion and a first flange portion, the first flange portion being circumferentially connected to one end of the first body portion along the pole post assembly, the first flange portion protruding relative to the first body portion, and the surface of the first body portion facing the second metal layer having a receiving groove.

[0018] The second metal layer includes a second body portion and a second flange portion. The second flange portion is circumferentially connected to one end of the second body portion along the pole assembly. The second flange portion protrudes relative to the second body portion. The second body portion is partially accommodated in the receiving groove. The first flange portion is connected to the second flange portion.

[0019] This allows for optimization of the cost of pole piece components.

[0020] In some embodiments, the circumferential side surface of the first body portion includes an arc surface and a plane, wherein the arc surface connects to the plane.

[0021] This increases the torsional strength of the pole assembly.

[0022] In some embodiments, a first step portion is formed on the periphery of the side of the first metal layer away from the second metal layer, and / or a second step portion is formed on the periphery of the side of the second metal layer away from the first metal layer.

[0023] This can improve the manufacturing efficiency of energy storage devices.

[0024] One embodiment of the present invention provides an energy storage device comprising the pole assembly of any of the above embodiments.

[0025] One embodiment of the present invention provides an electrical device including the energy storage device described in the above embodiment.

[0026] In the aforementioned energy storage devices and electrical equipment, the electrode assembly can be positioned through the positioning blind hole during the stamping process, enabling the electrode assembly to be manufactured through the stamping process, thereby improving efficiency and reducing costs, and also making it less likely to generate metal debris that is harmful to the internal environment of the energy storage device.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a perspective view of the pole assembly according to an embodiment of the present utility model;

[0030] Figure 2 This is a cross-sectional view of the pole assembly according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the composite board cutting process according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the blank according to an embodiment of the present invention;

[0033] Figure 5 This is another perspective view of the pole assembly according to an embodiment of the present utility model;

[0034] Figure 6 This is another cross-sectional view of the pole assembly according to an embodiment of the present invention;

[0035] Figure 7 This is another structural schematic diagram of the blank according to an embodiment of the present utility model;

[0036] Figure 8 This is another perspective view of the pole assembly according to an embodiment of the present utility model;

[0037] Figure 9 This is another cross-sectional view of the pole assembly according to an embodiment of the present utility model;

[0038] Figure 10 This is another perspective view of the pole assembly according to an embodiment of the present utility model;

[0039] Figure 11 This is another cross-sectional view of the pole assembly according to an embodiment of the present utility model;

[0040] Figure 12 A three-dimensional diagram of the negative electrode post in the related technology;

[0041] Figures 13 to 15 This is a schematic diagram of the friction welding process for the negative electrode post in related technologies;

[0042] Figures 16 to 18 This is a schematic diagram of the machining process for the negative electrode post in related technologies.

[0043] Explanation of reference numerals in the attached figures:

[0044] The components are: pole post assembly-100, composite plate-200, first metal layer-12, second metal layer-14, positioning blind hole-16, blank-18, interface-20, interface part-22, first body part-24, first flange part-26, receiving groove-28, second body part-30, second flange part-32, plane-34, arc surface-36, first step part-38, second step part-40. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein 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 and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0050] In related technologies, to reduce costs during the use of secondary batteries, the negative electrode busbar is made of aluminum, while the internal negative electrode material is made of copper. The negative electrode busbar and the negative electrode post, as well as the negative electrode post and the internal battery connecting piece, are all connected using highly reliable laser welding. Laser welding requires that the two materials being welded be of the same or have similar melting points. Therefore, the upper and lower layers of the negative electrode post are required to be made of two different materials, as shown in the attached diagram. Figure 12 As shown in the figure. The upper layer 60 is an aluminum layer, and the lower layer 62 is a copper layer.

[0051] There are two manufacturing processes for the negative electrode post: friction welding and machining of copper-aluminum composite plates. The friction welding process is shown in the attached diagram. Figures 13 to 15As shown, negative electrode 64 is made of copper, and negative electrode 66 is made of aluminum. Both negative electrodes 64 and 66 are manufactured using a stamping process. After stamping, negative electrode 64 needs to undergo cleaning and machining of friction marks, while negative electrode 66 needs to undergo cleaning and grinding. Then, negative electrodes 64 and 66 are welded together using a friction welding process, which will form weld marks 68 at the weld seam. Therefore, area H needs to be machined using a machining process. Finally, the negative electrode post is completed after grinding and cleaning.

[0052] The machining process for copper-aluminum composite plates at 300mm is shown in the attached document. Figures 16 to 18 As shown, the copper-aluminum composite plate 300 is first loaded and unloaded to form a blank 70. The blank 70 includes a copper layer 72 and an aluminum layer 74. Then, it is machined into a negative electrode post by CNC turning. Finally, the negative electrode post is completed by grinding and cleaning.

[0053] However, the friction welding process requires eight or more steps, which is inefficient and costly. The more steps there are, the more difficult and costly the process control becomes. Furthermore, metal powder and metal wires are easily generated during multiple steps, which can affect battery use and cause internal short circuits, fires, and explosions, posing a significant safety hazard.

[0054] The 300-degree turning process for copper-aluminum composite plates is costly. It requires placing each 70-degree blank on a CNC lathe for processing, which takes 30-60 seconds or even longer, resulting in extremely high costs. At the same time, the turning process is prone to producing sharp corners, which can cause scratches on other poles in subsequent processes, resulting in metal wires and metal powder.

[0055] In this invention, stamping, a metal processing technique, can produce 30-500 products per minute, offering high efficiency, low cost, and high reliability. Therefore, the pole assembly of this invention can be manufactured using the stamping process.

[0056] Please refer to Figures 1 to 2 The present invention provides an electrode assembly 100 including a first metal layer 12 and a second metal layer 14. The first metal layer 12 is connected to the second metal layer 14. A positioning blind hole 16 is formed on the surface of the second metal layer 14 away from the first metal layer 12. The positioning blind hole 16 is used to position the electrode assembly 100 when the electrode assembly 100 is processed by stamping process.

[0057] In the aforementioned pole assembly 100, the pole assembly 100 can be positioned by the positioning blind hole 16 when the pole assembly 100 is processed by the stamping process, so that the pole assembly 100 can be manufactured by the stamping process, which improves efficiency and reduces cost, and is less likely to form metal debris that is harmful to the internal environment of the energy storage device.

[0058] Furthermore, the terminal assembly 100 can be assembled to the end cap to form an end cap assembly, and the end cap assembly can be assembled to the housing to form an energy storage device. The energy storage device may include a secondary battery. The second metal layer 14 may be located on the outside of the end cap assembly, and the first metal layer 12 may be located inside the housing and electrically connected to the bare battery cell inside the housing. The surface of the second metal layer 14 away from the first metal layer 12 forms a positioning blind hole 16. The positioning blind hole 16 does not expose the first metal layer 12, which can prevent the first metal layer 12 from contacting the outside air and moisture and oxidizing, thereby improving the reliability of the terminal assembly 100.

[0059] In one embodiment, the terminal assembly 100 may be a negative terminal assembly. However, the present invention is not limited thereto, and the terminal assembly 100 may also be a positive terminal assembly.

[0060] When manufacturing the pole assembly 100, please refer to... Figures 3 to 5 First, a composite plate 200 formed by the first metal layer 12 and the second metal layer 14 is unloaded to form multiple blanks 18. Then, the blanks 18 are continuously stamped at multiple stations to form the electrode assembly 100 to be processed. After that, the electrode assembly 100 to be processed is subjected to vibration polishing, grinding, cleaning and other treatments to form the electrode assembly 100. Therefore, for the electrode assembly 100 of this utility model, the manufacturing process is reduced, which can achieve high-efficiency production and low manufacturing cost. Moreover, stamping can chamfer and remove sharp corners to avoid scratches. The reduction of processes reduces the risk of metal powder and metal wire entering the battery and improves the safety of the energy storage device. During stamping, the positioning tool of the stamping equipment can press against the surface of the second metal layer 14 of the blank 18 to form a positioning blind hole 16. Then, the stamping equipment can continuously stamp the blank 18 to form the electrode assembly 100 to be processed.

[0061] In some embodiments, the first metal layer 12 is a copper layer and the second metal layer 14 is an aluminum layer.

[0062] In this way, the electrode assembly 100 can be applied to the negative electrode.

[0063] Specifically, in one embodiment, the negative electrode tab of the bare battery cell is made of copper, and the welding requires that the two materials being welded be the same or have similar melting points. Therefore, the first metal layer 12 being a copper layer can achieve a good welding effect with the copper negative electrode tab, ensuring the connection reliability of the energy storage device components.

[0064] The electrodes connecting the two poles of the two energy storage devices are made of aluminum, and the second metal layer 14 is also made of aluminum. This allows the second metal layer 14 to achieve a good welding effect with the electrodes (aluminum electrodes), ensuring the reliability of the connection between the energy storage devices.

[0065] It is understood that in other embodiments, the first metal layer 12 is not limited to a copper layer, and the second metal layer 14 is not limited to an aluminum layer. The material of the first metal layer 12 can be determined according to the material of the tab of the bare cell, and the material of the second metal layer 14 can be determined according to the material of the electrode plate. No specific limitation is made here.

[0066] In some embodiments, the positioning blind hole 16 is a conical blind hole, and the pole post assembly 100 is stamped from a composite plate 200 formed by the first metal layer 12 and the second metal layer 14.

[0067] This can improve the manufacturing efficiency of the pole assembly 100.

[0068] Specifically, the stamping equipment can punch and cut the composite plate 200 formed by the first metal layer 12 and the second metal layer 14 to form multiple blanks 18. The stamping equipment can perform multi-station continuous stamping on the blanks 18 to form multiple pole post assemblies 100.

[0069] When performing multi-station continuous stamping on the blank 18, it may be necessary to adjust the angle of the blank 18. The positioning tool of the stamping equipment has a conical positioning element that forms a conical positioning blind hole 16 against the surface of the second metal layer 14. During the stamping process, because of the conical positioning element and the conical positioning blind hole 16, the angle of the blank 18 can be adjusted without removing the positioning element from the second metal layer 14, thereby improving the manufacturing efficiency of the pole post assembly 100.

[0070] In addition to facilitating the adjustment of the angle of the blank 18 during the stamping process, the conical positioning blind hole 16 also facilitates the adjustment of the angle of the blank 18 in subsequent processing.

[0071] In some implementations, please refer to Figure 2 The interface 20 between the first metal layer 12 and the second metal layer 14 includes an interface portion 22 corresponding to the positioning blind hole 16, and the shape of the interface portion 22 is adapted to the shape of the positioning blind hole 16.

[0072] This can improve the protection of the first metal layer 12.

[0073] Specifically, when the positioning element of the stamping equipment presses against the second metal layer 14 of the blank 18, the interface 20 between the first metal layer 12 and the second metal layer 14, corresponding to the positioning element, is also deformed to form an interface portion 22 corresponding to the positioning blind hole 16. Between the first metal layer 12 and the positioning blind hole 16, the first metal layer 12 is covered by the entire thickness of the second metal layer 14, making the second metal layer 14 provide better protection for the first metal layer 12.

[0074] exist Figure 2 In the middle, the positioning blind hole 16 is conical, and the interface part 22 is conical.

[0075] In some implementations, please refer to Figure 2 The first metal layer 12 includes a first body portion 24 and a first flange portion 26. The first flange portion 26 is circumferentially connected to one end of the first body portion 24 along the pole post assembly 100. The first flange portion 26 protrudes relative to the first body portion 24. The second metal layer 14 is connected to the side of the first flange portion 26 away from the first body portion 24.

[0076] This improves the efficiency of assembling the pole assembly 100 to the end cap.

[0077] Specifically, the end cap has a first through hole for installing the pole assembly 100. In order to position the pole assembly 100 when it is assembled onto the end cap, a positioning groove is formed on the upper surface of the end cap. The positioning groove is arranged around the first through hole and connected to the first through hole.

[0078] During assembly, the pole post assembly 100 is above the end cap, the first metal layer 12 is inserted into the first through hole facing downward toward the end cap, the first body part 24 passes through the first through hole, and the first flange part 26 and the second metal layer 14 are accommodated in the positioning groove, thereby positioning the pole post assembly 100 in the first through hole and improving the efficiency of assembling the pole post assembly 100 to the end cap.

[0079] It should be noted that, optionally, the first body part 24 may also be fitted with plastic, sealing rings and other components.

[0080] In some implementations, please refer to Figure 6 The first metal layer 12 includes a first body portion 24 and a first flange portion 26. The first flange portion 26 is circumferentially connected to one end of the first body portion 24 along the pole post assembly 100. The first flange portion 26 protrudes relative to the first body portion 24. The surface of the first body portion 24 facing the second metal layer 14 is provided with a receiving groove 28.

[0081] The second metal layer 14 includes a second body portion 30 and a second flange portion 32. The second flange portion 32 is circumferentially connected to one end of the second body portion 30 along the pole post assembly 100. The second flange portion 32 protrudes relative to the second body portion 30. The second body portion 30 is partially accommodated in the receiving groove 28. The first flange portion 26 is connected to the second flange portion 32.

[0082] In this way, the cost of the pole assembly 100 can be optimized.

[0083] Specifically, in one embodiment, a composite plate 200 formed by a first metal layer 12 and a second metal layer 14 is cut into blanks 18. The first metal layer 12 is a copper layer, and the second metal layer 14 is an aluminum layer. The density of copper is approximately 3.3 times that of aluminum. The thicker the copper layer, the heavier and more expensive the copper-aluminum composite plate 200. Therefore, in the composite plate 200, the thickness of the first metal layer 12 is less than the thickness of the second metal layer 14, reducing the weight of the composite plate 200 and lowering costs. Simultaneously, the weight of the electrode assembly 100 can also be reduced, increasing the energy density per unit weight of the energy storage device.

[0084] Please refer to Figure 7 During extrusion, the metal material flows. The punch presses through the copper layer (first metal layer 12) of the blank 18, causing the copper and aluminum layers (second metal layer 14) to spread outwards under pressure. During this spreading process, the copper layer forms the first body portion 24 and the first flange portion 26, while the aluminum layer forms the second body portion 30 and the second flange portion 32. The first body portion 24 forms a receiving groove 28, which tightly covers the surface of the second body portion 30, resulting in a tighter connection between the first metal layer 12 and the second metal layer 14, thus improving the reliability of the pole assembly 100. The forming process is shown in the attached figure. Figure 3 , Figure 7 and Figure 5 As shown. In Figure 6 The cross-section of the receiving slot 28 is U-shaped.

[0085] It is understood that in other embodiments, the first metal layer 12 is not limited to a copper layer, and the second metal layer 14 is not limited to an aluminum layer.

[0086] In some embodiments, the circumferential side surface of the first body portion 24 includes an arc surface 36 and a plane 34.

[0087] This increases the torsional strength of the pole assembly 100.

[0088] Specifically, when the pole assembly 100 is installed onto the end cap, the first body part 24 has a first through hole, a second through hole for the upper plastic, and a third through hole for the sealing ring. The shape of the through hole of the end cap, the upper plastic, or the sealing ring matches the circumferential side profile of the first body part 24. The circumferential side profile of the first body part 24 includes an arc surface 36 and a flat surface 34. Correspondingly, the hole wall of the through hole includes another flat surface. The circumferential flat surface 34 of the first body part 24 is matched and connected with the flat surface of the hole wall of the through hole to limit the movement, making the pole assembly 100 less prone to rotation and increasing the torsional strength of the pole assembly 100.

[0089] Typically, the blank 18 is punched out as a cylinder with an arc surface 36 on its circumferential side. During the forming process, the blank 18 is transformed from a cylinder into a first body part 24 with a plane 34 on its circumferential side. The plane 34 is used to form an anti-rotation limiting part, which increases the torsional strength of the pole post assembly 100.

[0090] exist Figures 8 to 9 In this design, the first body section 24 is generally rectangular in shape. Under the same flow requirements, the rectangular shape of the first body section 24 can improve material utilization and reduce material costs. Figures 10 to 11 The first body portion 24 has an oblong shape. It is understood that in other embodiments, the first body portion 24 may also have other non-circular shapes, which can increase the torsional strength of the pole assembly 100.

[0091] In some implementations, please refer to Figure 2 A first step portion 38 is formed on the periphery of the side of the first metal layer 12 away from the second metal layer 14, and / or a second step portion 40 is formed on the periphery of the side of the second metal layer 14 away from the first metal layer 12.

[0092] This can improve the manufacturing efficiency of energy storage devices.

[0093] Specifically, during the assembly of the pole assembly 100 to the end cap, the first step portion 38 and / or the second step portion 40 can be used for positioning the assembly fixture, so that the assembly fixture can quickly position the pole assembly 100, thereby improving the manufacturing efficiency of the energy storage device.

[0094] In one embodiment, a first step portion 38 is formed on the periphery of the side of the first metal layer 12 away from the second metal layer 14, and a second step portion 40 is formed on the periphery of the side of the second metal layer 14 away from the first metal layer 12. Thus, when positioning the electrode assembly 100, the assembly fixture can use both the first step portion 38 and the second step portion 40 to position the electrode assembly 100, facilitating operation.

[0095] In one embodiment, a first step portion 38 is formed on the periphery of the side of the first metal layer 12 away from the second metal layer 14, or a second step portion 40 is formed on the periphery of the side of the second metal layer 14 away from the first metal layer 12.

[0096] An energy storage device according to an embodiment of the present invention includes the pole assembly 100 of any of the above embodiments.

[0097] In the aforementioned energy storage device, the electrode assembly 100 can be positioned by the positioning blind hole 16 when the electrode assembly 100 is processed by the stamping process, so that the electrode assembly 100 can be manufactured by the stamping process, which improves efficiency and reduces cost, and also makes it less likely to form metal debris that is harmful to the internal environment of the energy storage device.

[0098] Specifically, the energy storage device can be a secondary battery or other types of battery. This utility model does not specifically limit the shape of the energy storage device, which can be cylindrical, cuboid, or other shapes.

[0099] The energy storage device may include a housing, an end cap assembly, and electrodes. The housing has a receiving cavity, and one side of the housing has an opening communicating with the receiving cavity. The end cap assembly is installed at the opening to seal the receiving cavity. The electrodes are located within the receiving cavity and include a positive electrode tab and a negative electrode tab. The end cap assembly includes a positive electrode post assembly 100 and a negative electrode post assembly 100. The tab welding area of ​​the positive electrode connecting piece (e.g., made of aluminum) is welded to the positive electrode tab, and the post welding area of ​​the positive electrode connecting piece is welded to the positive electrode post assembly 100. The tab connecting area of ​​the negative electrode connecting piece (e.g., made of copper) is welded to the negative electrode tab, and the post welding area of ​​the negative electrode connecting piece is welded to the first metal layer 12 of the negative electrode post assembly 100. The electrode post assembly 100 of this invention can be applied to a negative electrode post assembly 100.

[0100] One embodiment of the present invention provides an electrical device including the energy storage device described above, which is used to supply power to the electrical device.

[0101] In the aforementioned electrical equipment, the electrode assembly 100 can be positioned by the positioning blind hole 16 when the electrode assembly 100 is processed by the stamping process, so that the electrode assembly 100 can be manufactured by the stamping process, which improves efficiency and reduces cost, and also makes it less likely to form metal debris that is harmful to the internal environment of the energy storage device.

[0102] Specifically, electrical equipment includes, but is not limited to, energy storage devices, vehicles, and drones.

[0103] In one embodiment, the energy storage device may further include a cluster rack on which one or more energy storage devices can be mounted. Multiple energy storage devices may be arranged in an array on the cluster rack. The multiple energy storage devices may be electrically connected in series, parallel, or series-parallel configurations.

[0104] In one embodiment, multiple energy storage devices can be placed within a housing to form a battery device, and one or more battery devices can be mounted on a cluster rack. Multiple battery devices can be arranged in an array on the cluster rack. Multiple battery devices can be electrically connected in series, parallel, or series-parallel configurations. Multiple energy storage devices within a single battery device can be electrically connected in series, parallel, or series-parallel configurations.

[0105] Energy storage equipment can include, but is not limited to, energy storage containers, home energy storage cabinets, and other energy storage devices.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0107] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pole post assembly (100), characterized in that, include: First metal layer (12); A second metal layer (14) is connected to the first metal layer. A positioning blind hole (16) is formed on the surface of the second metal layer away from the first metal layer. The positioning blind hole is used to position the pole assembly when the pole assembly is processed by stamping process.

2. The pole assembly according to claim 1, characterized in that, The first metal layer is a copper layer, and the second metal layer is an aluminum layer.

3. The pole assembly according to claim 1, characterized in that, The positioning blind hole is a conical blind hole, and the pole assembly is made by stamping a composite plate formed by the first metal layer and the second metal layer.

4. The pole assembly according to claim 3, characterized in that, The interface (20) between the first metal layer and the second metal layer includes an interface portion (22) corresponding to the positioning blind hole, the shape of which is adapted to the shape of the positioning blind hole.

5. The pole assembly according to claim 1, characterized in that, The first metal layer includes a first body portion (24) and a first flange portion (26). The first flange portion is circumferentially connected to one end of the first body portion along the pole post assembly. The first flange portion protrudes relative to the first body portion. The second metal layer is connected to the side of the first flange portion away from the first body portion.

6. The pole assembly according to claim 1, characterized in that, The first metal layer includes a first body portion and a first flange portion. The first flange portion is circumferentially connected to one end of the first body portion along the pole post assembly. The first flange portion protrudes relative to the first body portion. The surface of the first body portion facing the second metal layer is provided with a receiving groove (28). The second metal layer includes a second body portion (30) and a second flange portion (32). The second flange portion is circumferentially connected to one end of the second body portion along the pole assembly. The second flange portion protrudes relative to the second body portion. The second body portion is partially accommodated in the receiving groove. The first flange portion is connected to the second flange portion.

7. The pole assembly according to claim 5 or 6, characterized in that, The circumferential side surface of the first body part includes an arc surface (36) and a plane (34), wherein the arc surface connects to the plane.

8. The pole assembly according to claim 1, characterized in that, A first step portion (38) is formed on the periphery of the side of the first metal layer away from the second metal layer, and / or a second step portion (40) is formed on the periphery of the side of the second metal layer away from the first metal layer.

9. An energy storage device, characterized in that, Includes the pole assembly as described in any one of claims 1-8.

10. An electrical appliance, characterized in that, The device includes the energy storage device of claim 9, which is used to supply power to the electrical equipment.

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