Energy storage element, metal component and method for manufacturing an energy storage element

Abstract

Energy storage element (100) comprising a metal component (2) being a metal plate element, which includes a projection (2b) extending from a surface of the metal component (2) and forming part of a container (101), wherein the projection (2b) includes a tubular section (22) present at a front end of the projection (2b) and in an extension direction intersecting the surface, and a base section (21) which is solid or tubular and extends from the surface of the metal component (2) in the extension direction to the tubular section (22), wherein a wall thickness of the base section (21), if tubular, is greater than a wall thickness of the tubular section (22), characterized in that the projection (2b) is formed from the metal component (2) by forming.

Description

Cross-reference to related registrations

[0001] This application is based on Japanese patent application no. 2012-015809, filed on January 27, 2012, and Japanese patent application no. 2012-280115, filed on December 21, 2012, and claims priority from them. The entire disclosure of the above-mentioned applications, including the patent description, drawings, and claims, is hereby incorporated by reference as a whole. Area

[0002] The present invention relates to an energy storage element comprising a metal component, which is a metal plate element forming part of a container and containing a projection extending from a surface thereof, the metal component itself, and a method for manufacturing an energy storage element. background

[0003] Metal components equipped with protrusions are used for various purposes. In patent document 1, for example, a metal component is positioned using a protrusion and fixed to another component.

[0004] Forming the projection on the metal plate element may include forming a massive projection, as is the case in patent document 1. List of references Patent documents Patent document 1

[0005] Japanese unexamined patent application publication no. 2001-340928. Summary

[0006] The objective of the present invention is to create a metal component formed by creating a projection on a plate-shaped element while simultaneously ensuring the mechanical strength of the projection and its surroundings.

[0007] To achieve the above-mentioned goal, the present disclosure provides an energy storage element comprising a metal component, which is a metal plate element, containing a projection extending from a surface of the metal component and forming part of a container, wherein the projection includes a tubular section present at a front end of the projection and in an extension direction intersecting the surface, as well as a base section, which is solid or tubular and extends from the surface of the metal component in the extension direction to the tubular section, wherein a wall thickness of the base section, if tubular, is greater than a wall thickness of the tubular section.

[0008] That is, if the energy storage element is provided with a metal component as part of the container, formed by creating a projection on a plate element, and the projection engages with another component, the base end of the projection often receives external force exerted along the surface formed by the projection.

[0009] For this reason, the base end of the projection is designed as a base section that is solid or tubular with thick walls to ensure the strength of the base end of the projection.

[0010] In contrast, the front end of the projection, in the direction in which it extends, or the direction of expansion, which does not necessarily have to absorb the acting external forces, is designed as a tube section with a hollow center in order to simplify the process of formation and subsequent deformations to be carried out.

[0011] Furthermore, the base section and the tube section can be seamless and have a common central axis.

[0012] This means that the tubular section serves to ensure that the projection is high enough and that other operations, such as machining during assembly of the projection with other components, can be carried out easily. Furthermore, the presence of the solid base section ensures that the projection has sufficient load-bearing capacity and strength.

[0013] Furthermore, a wall of the projection can be designed in such a way that its thickness gradually decreases in the direction of its course from a base end to the front end.

[0014] This means that the base end region is thicker than the wall of the front end region of the tube section, so that it serves as the base section and ensures that the projection is sufficiently strong.

[0015] Furthermore, the energy storage element can include a closed-end recess formed on a surface on one side of the metal component opposite a surface on which the projection is formed, and which is positioned such that, viewed in the direction of travel, it overlaps a position of the projection.

[0016] This means that if the surface of the metal component opposite the surface on which the protrusion is formed is shaped to have a depression, this makes it possible to use the depression as the source for supplying the material from which the protrusion is formed when the protrusion is formed on the plate component using forming.

[0017] Furthermore, because the recess is designed with a closed end, the front and rear surfaces of the metal component do not penetrate at the point where the projection is formed. Instead, a wall is formed that prevents circulation between the front and rear surfaces of the metal component. This is particularly useful when the metal component forms part of an airtight container, where preventing circulation between the front and rear surfaces of the metal component is preferable.

[0018] Furthermore, the distance between the bottom of the depression and the front end of the projection in the direction of extension can be shorter than the distance between the surface of the metal component on which the projection is formed and the front end of the projection in the direction of extension.

[0019] This means that if the protrusion is formed by forming, the depression that is formed to obtain material for the formation of the protrusion is formed to be substantially deep enough to ensure a sufficient amount of material for the protrusion.

[0020] In this design as well, the wall thickness of the projection, formed by both the side surfaces of the depression and the side surfaces of the projection, can be a thickness that provides sufficient strength by appropriately determining the width of the depression.

[0021] Furthermore, the depression can be designed so that, viewed in the direction of expansion, it is wider than the projection. That is, the formation of a sufficiently large projection can be ensured by designing the depression to be wide enough to provide an adequate amount of starting material for the projection.

[0022] Furthermore, it is possible that the depth of the depression is less than half the thickness of the metal component.

[0023] This ensures that the area around the projection has high mechanical strength if a wall of sufficient thickness is formed in a section of the metal component from the bottom of the recess to the bottom of the projection.

[0024] Furthermore, the depression may be present on the same surface of the metal component where the protrusion is formed.

[0025] This means that if the depression formed to provide starting material for the formation of the protrusion is present in the surface of the plate component on which the protrusion is formed, it can prevent the surface of the plate component opposite the surface on which the protrusion is formed from deforming significantly during the formation of the protrusion.

[0026] Furthermore, the projection can engage with a seal (sealing element) located between an electrode terminal and the metal component. This means that if the electrode terminal and the seal are assembled as separate parts with the metal component, and the seal and projection are assembled in such a way that they engage, rotation of the electrode terminal via the seal can be prevented.

[0027] Furthermore, the pipe section can be compressed.

[0028] This means that if the electrode connection and the seal are assembled as separate parts with the metal component, the parts can be fixed by compressing the tube section of the projection that fits through the through holes.

[0029] Furthermore, a through-hole can be formed in the seal, and this through-hole can contain an inclined surface that gradually slopes outwards from the surface of the metal component, engaging with the compressed tube section. The distance between the inclined surface and the surface of the metal component can be greater than the distance between the base section and the surface of the metal component.

[0030] Thus, when the tubular section of the projection is compressed, the wall of the tubular section deforms into a shape determined by the inclined surface, so that excessive deformation of the tubular wall section by the compression is limited and damage to the wall of the tubular section is prevented.

[0031] Furthermore, the presence of the inclined surface allows the length of the tube section to be shortened.

[0032] Furthermore, the metal component is a section of the container of the energy storage element, and the individual part or attachment is a seal that is located between the electrode connection and the metal component.

[0033] This means that when the plate component, which forms part of the container of the energy storage element, and the seal are assembled during the assembly of the energy storage element, the projection formed in the plate component fits into the through hole formed in the seal.

[0034] Furthermore, a variety of protrusions may be present on the metal component that engage with a seal.

[0035] This means that a multitude of protrusions can be used to position and fix a single seal.

[0036] Furthermore, a method for manufacturing an energy storage element, comprising as a section of a container a metal component which is a metal plate element and includes a projection extending from a surface of the metal component, may include pressing the metal plate element to form the projection which includes a) a tubular section present at a front end of the projection in an extension direction intersecting the surface, and b) a base section which is solid or tubular and extends from the surface of the metal component in the extension direction to the tubular section, wherein a wall thickness of the base section, if tubular, is greater than a wall thickness of the tubular section.

[0037] Furthermore, the method may include compressing the tubular section of the projection when the projection is fitted into a through-hole formed in a seal positioned between an electrode terminal and the metal component.

[0038] This means that the compression of the projection can be easily carried out due to the presence of the tube section at the front end of the projection in the direction of expansion. Brief description of the drawings

[0039] These and other tasks, advantages and features of the disclosure will become apparent from the following description in conjunction with the accompanying drawings, which represent a specific embodiment of the present invention.

[0040] Fig. Figure 1 is a perspective external view of the energy storage element according to an embodiment of the present invention.

[0041] Fig. Figure 2 is a perspective view showing the internal structure of the energy storage element according to an embodiment of the present invention.

[0042] Fig. Figure 3 is a sectional view of a main component of the energy storage element according to an embodiment of the present invention.

[0043] Fig. Figure 4 is a sectional view of a main component showing an assembly process according to an embodiment of the present invention.

[0044] Fig. Figure 5 is a sectional view of a main component showing an assembly process according to an embodiment of the present invention.

[0045] Fig. Figure 6 is a sectional view of a main component showing an assembly process according to an embodiment of the present invention.

[0046] Fig. Figure 7 is a perspective view of a main component according to an embodiment of the present invention.

[0047] Fig. Figure 8 is an expanded view of a main component according to an embodiment of the present invention.

[0048] Fig. Figure 9A is a sectional view of a main component of an energy storage element according to another embodiment of the present invention.

[0049] Fig. Figure 9B is a sectional view of a main component of an energy storage element according to another embodiment of the present invention.

[0050] Fig. Figure 9C is a sectional view of a main component of an energy storage element according to another embodiment of the present invention.

[0051] Fig. Figure 9D is a sectional view of a main component of an energy storage element according to another embodiment of the present invention.

[0052] Fig. Figure 9E is a sectional view of a main component of an energy storage element according to another embodiment of the present invention.

[0053] Fig. Figure 10 is a sectional view of a main component according to another embodiment of the present invention. Description of embodiments

[0054] Although it is possible to produce a completely solid and mechanically robust projection that is exceptionally resistant to external forces, the process of forming such a projection is not simple. Furthermore, the machining required to further shape the projection, for example, to assemble it with another part, is also complex.

[0055] Although it would be conceivable to press the entire protrusion into a tubular structure to simplify the forming process, this would reduce the mechanical strength of the protrusion.

[0056] Furthermore, if a massive protrusion is formed on the plate component by means of plastic deformation, the reduction of the mechanical strength of the protrusion is also a problem, since the formation affects the thickness of a section of the plate component.

[0057] The invention was made in light of the above findings and objectives and aims to create an energy storage element that is provided with a metal component as part of the container, which contains an easily formable and machinable projection and which can ensure that the projection and the surrounding area are sufficiently strong.

[0058] In the following, an embodiment of the present invention is described with reference to the drawings.

[0059] The present description focuses on an energy storage element that is provided as part of a container with a metal component on which a projection is formed.

[0060] A secondary battery with a non-aqueous electrolyte (especially a lithium-ion battery), which is an example of a secondary battery, serves to illustrate the energy storage element.

[0061] It should be noted that the term “energy storage element” is used here in a broader sense and includes capacitors as well as secondary batteries, which are elements (devices) that can undergo charging and discharging processes.

[0062] Structure of the energy storage element 100 (Secondary battery with non-aqueous electrolyte).

[0063] The energy storage element 100 according to the present embodiment, contains, as Fig. 1 and Fig. 2 show a container 101 , which consists of a disguise 1 , which is a tube with a closed end (i.e., a rectangular tube with a closed end), and a cover plate 2 consists of a metal component that forms an open end of the cladding 1 covers. In the present embodiment, the cover plate 2 on the cladding 1 welded to secure the cladding 1 to seal.

[0064] The metal component of the cover plate 2 It consists of a rectangular (long and narrow) plate component. A positive electrode terminal PT and a negative electrode terminal NT are located on one surface of the cover plate. 2 in the direction of their respective ends of the container 101 available.

[0065] The shape of the cladding 1 , which the cover plate 2It contains a thin cube with a recording chamber inside. The overall shape of the casing 1 It is a rectangular tube or rectangular container-like shape with a closed end. Therefore, the container 101 , who came out of the disguise 1 and the cover plate 2 It consists essentially of a thin, cubic structure. It should be noted that Fig. 2 the internal structure of the container 101 separate from the cladding 1 and the complete energy storage element 101 (in Fig. (1 shown). An electrode arrangement. 3 (described below) is represented by a dot-dash line. Fig. 2 serves to make the internal structure visible in a simple way.

[0066] The electrode arrangement 3 , which is represented by the dot-dash line, a current collector 4 and a power collector 6 are, as in Fig. 2 shown, inside the container 101 absorbed by immersion in an electrolyte.

[0067] The electricity collector 4 and the current collector 6 are elements that connect the electrode terminals PT and NT to the electrode arrangement 3 connect.

[0068] Both the current collector 4 as well as the current collector 6 These are conductors that essentially have the same shape and are arranged symmetrically. Furthermore, the material properties of the current collector differ. 4 and those of the power collector 6 from each other. That is, the positive current collector 4 It mainly contains aluminum, and the negative current collector 6 It mainly contains copper.

[0069] Fig. Figure 3 is a sectional view showing the positive electrode terminal PT and the components surrounding it.

[0070] Fig. Figure 8 is a split perspective view of individual parts including the cover plate.

[0071] The electricity collector 4 and the current collector 6 , which in Fig. 3 and Fig. Figure 8, which are essentially L-shaped, are formed by bending plate components made from the materials described above. Furthermore, the vertically extending sections of the current collector are 4 and the power collector 6 on the electrode arrangement 3 to be bent. The bending process creates a connecting section. 4a and a connecting section 6a at the power collector 4 or the current collector 6 for connecting to the electrode arrangement 3 trained. A rivet mounting hole 4b and a rivet mounting hole 6b to insert a rivet 8 as well as a rivet 15are located at the upper end of the current collector 4 or the current collector 6 (of the horizontally extending section).

[0072] The electrode arrangement 3 The electrode assembly comprises a pair of electrode plates: a long, foil-like positive electrode plate coated with an active material, and a long, foil-like negative electrode plate coated with an active material. The electrode assembly also includes an insulating separator, which is designed as a long sheet or foil-like object. A layered structure, in which the separator is positioned between the positive and negative electrode plates to prevent conduction between them, is wound around the electrode assembly. 3 to train.

[0073] An uncoated section 3a the wound electrode arrangement 3, which is an end of the foil-like positive electrode plate that is not coated with an active material, extends outwards on one side (i.e. in a direction perpendicular to the longitudinal direction of the foil-like positive electrode plate), and an uncoated section 3b the wound electrode arrangement 3 , which is one end of the foil-like negative electrode plate that is not coated with an active material, extends outwards to another side, opposite to the side towards which the uncoated section faces. 3a extends (i.e. in a direction perpendicular to the longitudinal direction of the foil-like negative electrode plate).

[0074] In the present embodiment, the electrode arrangement 3 formed by winding the positive electrode plate, the negative electrode plate and the separator so that they are in the container 101be recorded.

[0075] The electrode arrangement 3 is so in the disguise 1 It was noted that the winding axis of the electrode arrangement is parallel to the longitudinal direction of the cover plate. 2 is. As the schematic representation in Fig. Figure 2 shows the uncoated section. 3a the positive electrode plate, viewed from the front, arranged so that it forms the connecting section 4a of the power collector 4 overlaps, and the uncoated section 3b The negative electrode plate is arranged in such a way that it forms the connecting section 6a of the power collector 6 overlaps.

[0076] The uncoated section 3a the positive electrode plate is connected to the connecting section 4a of the power collector 4 welded on, overlapping it in the process. Furthermore, the uncoated section 3bthe negative electrode plate at the connecting section 3b the negative electrode plate at the connecting section 6a of the power collector 6 welded on and overlapping it in the process.

[0077] The positive electrode terminal PT, which is located on the cover plate 2 If it is made of metal (specific examples include aluminum and stainless steel), it is electrically connected to the current collector. 4 connected, and the negative electrode terminal NT is electrically connected to the current collector. 6 tied together.

[0078] The manner in which the positive electrode connection PT is attached to the cover plate 2 and the connection with the current collector 4 This essentially corresponds to the way the negative electrode connection NT is attached to the cover plate. 2 and the connection with the current collector 6Furthermore, these two structures are arranged symmetrically. The only difference lies in the material properties of the respective metal elements.

[0079] The following explains the structure of the positive electrode side.

[0080] A rivet head 8a of the rivet 8 The rivet, which is made of a conductive metal material (i.e., aluminum), serves as the positive electrode terminal PT. The end of the rivet 8 , which is inside the container 101 compressed is, like Fig. Figure 3 also shows, electrically with the current collector 4 tied together.

[0081] The rivet head 8a of the rivet 8 is sealed by an upper seal 10 (upper sealing element) enclosed and held in plastic, which represents a sealing element made of an electrically conductive material.

[0082] The upper seal 10 insulates the cover plate2 and the rivet 8 , which serves as the electrode connection PT. The upper surface (outer surface) of the upper seal. 10 is designed in such a way that it has a recess which corresponds to the shape of the rivet head 8a (which in the present embodiment is essentially cubic in shape) of the rivet 8 This corresponds to the lower surface (inner surface) of the upper seal. 10 is designed in such a way that it has a recess which corresponds to the outer surface of a raised collector's indentation 2a corresponds to the area on the upper surface of the cover plate 2 is formed. A through hole. 10a , over which the rivet 8 It is inserted into the wall of the upper seal. 10 formed, which separates the recess on the upper surface and the recess on the lower surface (see Fig. 8) The wall of the through-hole 10a extends cylindrically in the insertion direction of the rivet8 and covers the circumference of the rivet 8 away.

[0083] Furthermore, there is a positioning section. 10b on the upper seal 10 formed and extends in a longitudinal direction of the cover plate 2 from the rivet's holding section 8 The positioning section 10b is with the lead 2b in intervention that extends from the cover plate 2 of the container 101 extends outwards.

[0084] A lower seal made of plastic 12 (lower sealing element), which is a sealing element made of an electrically insulating material, is located between the cover plate 2 and the current collector 4 on the inside of the container 101 located on the side of the electrode connection PT.

[0085] The upper surface of the lower seal 12is designed in such a way that it has a raised section corresponding to the recess used in forming the raised collector receptacle 2a in the lower surface of the cover plate 2 is formed. The lower surface of the lower seal. 12 is designed in such a way that it has a recess into which the top of the current collector fits. 4 It fits. The lower seal also has a through-hole. 12a provided, for example by the rivet 8 is being introduced.

[0086] The rivet 8 It is inserted in such a way that it passes through the through hole. 10a in the upper seal 10 , the through hole 2c in the sublime collector's photograph 2a the cover plate 2 , the through hole 12a in the lower seal 12 and the rivet mounting hole 4b in the current collector 4 passes through. The rivet 8It is then compressed to clamp these parts together. The current collector 4 and the rivet head 8a of the rivet 8 , which serves as the electrode connection PT, are tightened by upsetting the rivet 8 on the cover plate 2 fastened, and the rivet 8 and the current collector 4 are through the upper seal 10 and the lower seal 12 , which are enclosed between them, opposite the cover plate 2 Insulated. Furthermore, the components are insulated by the separating force of the upsetting rivet. 8 hermetically sealed.

[0087] The design of the negative electrode terminal NT is the same as that of the positive electrode terminal and includes the rivet. 15 , which consists of a conductive metal material, an upper seal made of plastic 16(upper sealing element), which is a sealing element made of an electrically insulating material, and a lower seal. 17 (lower sealing element). The upper surface of the upper seal holds on the negative side. 16 the rivet head 15a of the rivet 15 , which serves as the electrode connection NT, the lower surface of the upper seal 16 holds the sublime collector's photograph 2a , and the wall of a through-hole 16a It runs in a cylindrical shape and covers the circumference of the rivet. 8 away.

[0088] Furthermore, it fits on the upper surface of the lower seal. 17 formed raised section to the lower surface of the raised collector's incision 2a the cover plate 2 , and those on the lower surface of the lower seal 17 The formed recess holds the end of the current collector. 6 .

[0089] The rivet 15is through the through hole 16a in the upper seal 16 , the through hole 2c in the sublime collector's photograph 2a the cover plate 2 , the through hole 17a in the lower seal 17 as well as the rivet mounting hole 6b in the current collector 6 The material is guided through the material and then compressed to clamp these parts together. This creates a gap between the components and the cover plate. 2 electrically insulated and the components hermetically sealed.

[0090] The following describes the process of attaching the individual parts to the cover plate. 2 during the process of manufacturing the energy storage element 100 explained.

[0091] The individual or add-on parts of the cover plate 2 , i.e. the rivet 8 (electrode connection PT), the rivet 15 (electrode connection NT), the current collector 4 and the current collector6 are using the upper seal 10 and 16 as well as the lower seal 12 and 17 on the cover plate 2 appropriate.

[0092] A sublime collector's photograph 2a and a lead 2b are located at the central component, i.e., the cover plate 2 formed on the sides of the positive and negative electrodes. They are, in the direction of expansion (direction perpendicular to the surface of the cover plate). 2 ) seen, two protrusions 2b between the two sublime collector's photographs 2a trained. Furthermore, the two protrusions 2b on the side (near) of the rivet head 2a of the rivet 8 and the rivet head 15a of the rivet 15 trained to remove the rivet head 8a of the rivet 8 as well as the rivet head 15a of the rivet 15to position which are the electrode connection PT or the electrode connection NT.

[0093] The sublime collector's photograph 2a and the lead 2b are produced by forming (i.e., pressing) a thin, flat, rectangular metal plate (the cover plate). 2 trained.

[0094] The sublime collector's photograph 2a is shown schematically on the outside of the container 101 pressed so that they are in an essentially rectangular shape in the cover plate 2 is raised. This sublime collector's photograph 2a , which are from the container 101 Being designed to rise outwards, it fits into the lower recessed surface of the upper seal. 10 as well as the upper seal 16 and positions the upper seal 10 as well as the upper seal 16 Furthermore, it fits on the inside of the container. 101formed recessed recess on the lower seal 12 and the lower seal 17 and positions them.

[0095] Fig. 4 and Fig. 7 are enlarged sectional views of the position where the projection 2b is trained.

[0096] The lead 2b As shown, it has a form in which a basic section 21 as well as a tubular section or tube segment 22 on the upper surface of the cover plate 2 are arranged one above the other.

[0097] The basic section 21 forms the end of the projection closest to the cover plate 2b and extends continuously from the surface of the cover plate 2 outwards. In the present embodiment, the base section 21 a massive cylinder extending in a direction perpendicular to the surface of the cover plate 2 extends.

[0098] The tubular section 22 is at the leading end of the lead 2b trained and extends continuously from the basic section 21 outward.

[0099] In the present embodiment, the tubular section 22 a tube (i.e. a cylindrical tube) with an open end at the front.

[0100] In the present embodiment, the base section 21 and the tubular section 22 a common central axis, which runs in a direction perpendicular to the cover plate 2 (the direction of extension of the projection) 2b ) follows.

[0101] The massive base section 21 provides structural strength between the projection 2b and the cover plate 2 That is, if the lead 2b about the upper seal 10 and the upper seal 16, which has the advantage 2b are in intervention, should be exposed to an external force, gives base section 21 the lead 2b strong resistance to external forces.

[0102] Furthermore, the presence of the tubular section allows 22 the total volume of the lead 2b to be kept to a minimum, and the lead 2b can be formed by means of shaping, without this significantly reducing the thickness of the cover plate. 2 It is possible. It should be noted that the tubular section 22 , which has a hollow center at the front end of the projection 2b in the direction of expansion, during the installation of the upper seal 10 and the upper seal 16 can be compressed.

[0103] Furthermore, on the inner surface of the cover plate 2 of the container 101 (i.e., the area of ​​the cover plate)2 , which is opposite the area where the projection 2b (is trained) a deepening 23 trained (see for example Fig. 4) The in-depth study 23 is, in the direction of extension of the projection 2b seen (i.e., in planes parallel to the surface of the cover plate) 2 ), arranged so that they determine the position of the projection 2b overlaps. In the present embodiment, the recess is 23 a cylindrical depression that has a central axis with the projection 2b They have in common. Furthermore, the plate component, on which the lead is located, is 2b is formed (the cover plate 2 ), a section of the container 101 of the energy storage element 100 So that the container 101 If the structure is hermetically sealed, the area in which the projection is located must be 2bis designed to prevent circulation between the outside and inside of the container. 101 allow. For this reason, the deepening 23 shaped so that it has a closed end. The section from the lower surface of the depression. 23 to the basic section 21 is a wall 25 , which ensures that the container 101 It is airtight.

[0104] It should be noted that if the lead 2b on a section of the cover plate 2 is trained, preferably with a specialization 23 is present, which is wider than the lead 2b , and in particular a more in-depth exploration 23 is present, which has an underside or base that is wider than the projection 2b , as this Fig. 4, Fig. 5 and Fig. 6 show cracks in the formation area of ​​the protrusion 2bto prevent this, as it makes it easier to ensure that the wall thickness is correct. 25 is greater than half the thickness of the cover plate 2 during the forming process to create the protrusion 2b .

[0105] This means it is possible to achieve high mechanical strength in the vicinity of the protrusion. 2b to ensure, by how Fig. 4, Fig. 5 and Fig. 6 show the deepening 23 is designed so that it has a depth D that is less than half the thickness of the cover plate 2 , and has a larger surface area in a direction perpendicular to its central axis, and the projection 2b is formed by forming.

[0106] Therefore, even if the pressure inside the container 101 increases, the area around the protrusion 2b withstand the pressure sufficiently.

[0107] If the deepening 223is designed so that it is flat, the advantage is 2b and its surroundings sufficiently to substantially resist a rotational moment, a force, for example, via the body PT or the electrode connection NT, particularly when a thin cover plate is used. 2 is used to reduce the weight of the energy storage element. 100 to reduce.

[0108] The in-depth 23 This is used to displace the main starting material for the formation of the advantage. 2b on the cover plate 2 formed using press molds (forming).

[0109] In the direction of extension of the projection 2b is the width of the structure of the depression 23 (on the surface of the cover plate) 2 ) greater than the width of the structure of the protrusion 2bin the same direction, thus easily ensuring that sufficient material is available for the formation of the projection. 2b is guaranteed.

[0110] Furthermore, the lower surface of the depression is located 23 in the direction of extension of the projection 2b closer to the side of the cover plate surface 2 , where the deepening 23 is formed (the inner surface of the cover plate 2 of the container 101 ), than on the side of the surface of the cover plate 2 , where the lead 2 is formed (the outer surface of the cover plate 2 of the container 101 ).

[0111] Together with a recess on the lower surface for inserting the raised collector mount 2a and a recess on the upper surface for fitting with the rivet head 8a of the rivet 8 as well as the rivet head 15a of the rivet15 as already described, it includes the upper seal 10 and the upper seal 16 a through hole 31 , which is in the positioning section 10 and the positioning section 16 to pass through the ledge 2b is trained (see Fig. 3 and Fig. 4).

[0112] The lower seal 12 and the lower seal 17 It includes, as already described, a raised section on the upper surface for fitting with the raised collector receptacle. 2a formed recess as well as a recess on the lower surface for receiving the upper end of the current collector 4 and the power collector 6 .

[0113] The upper ends of the current collector 4 and the power collector 6including a formed step that rises upwards and fits into the recess in the lower surface of the lower seal 12 and the lower seal 17 is trained.

[0114] During the process of mounting the cover plate 2 components to be attached, the upper seal 10 and the upper seal 16 on the respective sublime collector's photographs 2a as well as the protrusions 2b Pay attention, the one on the cover plate 2 are trained (see Fig. 5), and the lower seal 12 , the lower seal 17 , the electricity collector 4 as well as the power collector 6 are attached to the inside of the cover plate 2 of the container 101 It fit. Then the rivet 8 and the rivet 15 into the corresponding through holes (for example, the through hole) 10a), which are formed in each of the components, from the top side (the outside of the container). 101 ) introduced here.

[0115] In this inserted state, the ends of the rivet 8 and the rivet 15 from the inside of the container 101 her (see Fig. 3) compressed. The ends of the projection 2b They will also be compressed if necessary (see Fig. 6) Compressing the projection 2b can be done by taking advantage of the lead 2b is pressed with a tool with a spherical or ball-shaped tip to indent the wall of the tubular section 22 to widen outwards.

[0116] The positioning section 10b the upper seal 10 and the positioning section of the upper seal 16 contain an inclined surface 32 , with which the tubular section 22after the compression in the through hole 31 comes into engagement, and which is inclined outwards with respect to the through-hole, i.e., becomes more inclined with increasing distance from the projection 2b gradually from the surface of the cover plate 2 inclined away. Furthermore, the inclined surface 32 further from the surface of the cover plate 2 positioned further away than the base section 21 from the surface of the cover plate 2 is removed. Due to the presence of the inclined surface 32 can the tubular section be prevented 22 of the lead 2b is bent too much.

[0117] If the cover plate 2If the assembled components are constructed as described above, even if an external rotational force is applied to the electrode connection NT or the electrode connection PT, rotation of the electrode connection NT and the electrode connection PT with the upper seal is possible. 10 and the upper seal 16 can be prevented, since the protrusions 2b on the cover plate 2 with the positioning section 10b the upper seal 10 and the positioning section 16b the upper seal 16 They are brought into play. There are examples of two energy storage elements being used together. 100The electrodes, which are connected via a busbar to their respective electrode terminals NT and PT, may change their position, for example, due to vibration of the two energy storage elements, if a rotational or torsional force is applied externally to electrode terminal NT or electrode terminal PT. Furthermore, a rotational force is applied externally to electrode terminal NT and electrode terminal PT if the screws securing electrode terminal NT and electrode terminal PT are compressed, or if the electrode terminal NT and electrode terminal PT themselves are compressed.

[0118] Furthermore, in the present embodiment, rotation of the electrode connection NT and the electrode connection PT is prevented, since the upper seal 10 and the upper seal 16 with the sublime collector's photographs 2a are undergoing intervention. Design variants

[0119] Variants of the embodiment according to the present invention are listed below. 1) In this embodiment, the projection 2b simply by pressing on the cover plate 2 formed so that the tubular section 2 on the base section 21 is trained, and the deepening 23 is formed on the surface opposite the surface where the projection 2b is being trained. However, there are a number of variations for each component in the development of the advantage. 2b possible.

[0120] Fig. 9A and Fig. 9E shows examples of these variants.

[0121] First, the in Fig. 9A shows a structure with a depth 23 , which is shaped differently than the protrusion 2b according to the embodiment.

[0122] The in Fig. 9A shown depression 23 is designed in such a way that there is a distance between a lower surface 23a the in-depth 23 and the leading edge 2b in the direction of expansion is shorter than a distance between the surface of the cover plate 2 , where the lead 2b is formed, and a front end of the projection 2b in the direction of expansion.

[0123] Furthermore, the width of the depression 23 , in the direction of extension of the projection 2b (in the direction perpendicular to the cover plate) 2 ) seen, smaller. That is, viewed in the direction of expansion, the diameter A of the depression is 23 smaller than the diameter B of the tubular section 22 .

[0124] This applies to the area of ​​the surface where the protrusion 2b on the cover plate 2is trained to reach a predetermined position at the front end of the projection 2b in the direction of expansion the wall of the projection 2b , which consist of a side surface 23b the in-depth 23 and a side surface 21a of the lead 2b consists of a thick wall that is thicker than the wall of the ledge. 2b at the front end in the direction of its expansion (the wall of the tubular section) 22 ).

[0125] The lead 2b Due to the formation of this thick wall, it exhibits sufficient strength against forces acting from the outside along its surface.

[0126] The in Fig. The structure shown in Figure 9B differs from that of the projection. 2b according to the embodiment, in that the recess 23 over the entire cover plate 2 is available.

[0127] The wall25 is thickest in this variant.

[0128] It should be noted that in order to develop the advantage 2b According to this variant, the frequency with which the workpiece is pressed during the pressing process can be increased using press molds, for example to increase the material for forming the protrusion. 2b evenly across the entire cover plate 2 to collect.

[0129] The next in Fig. The setup shown in 9C is similar to that in Fig. 9A, a thick-walled tubular base section 21 from the surface of the cover plate 2 , where the lead 2b is formed up to the predetermined position at the front end in the direction of expansion. That is to say, the base section 21 It is not solid, but rather a tubular section with thicker walls than the tube section. 22 The wall of the in Fig. The base section shown in 9C is attached to at least one wall surface (the inclined inner wall surface). 21b in Fig. 9C) inclined. That is, the thickness of the wall of the base section. 21 from the base end of the lead 2b The decrease gradually decreases up to the front end.

[0130] Furthermore, how Fig. 9D shows at least one wall surface (the interior wall surface in Fig. 9D) of the total lead 2b be inclined. That is, the wall of the base section. 21 from the base end of the lead 2b to the front end and the wall of the tube section 22 are designed in such a way that their thickness decreases continuously and gradually.

[0131] In this case, a section can be taken from the lower end of the projection. 2b up to a certain position along the length of the ledge 2b in the direction of extension as the base section 21be recognized.

[0132] The following structure in Fig. 9E differs from the embodiment in which the recess 23 , who is trained to provide material for the training of the lead 2b to provide, on the surface of the cover plate 2 located opposite the surface where the projection 2b is formed on the same surface of the cover plate 2 , where the lead 2b is formed with a ring-shaped depression 24 provided, which gives the advantage 2b surrounds. This occurs during the development of the deepening. 24 Displaced material serves as the main material source for the formation of the protrusion. 2b .

[0133] Furthermore, how Fig. 10 shows the lead 2b a massive base section 21and contain a tubular section having a wall whose thickness depends on the base end of the projection 2b gradually decreases towards the front end.

[0134] In the exemplary setups and embodiments described above, the shape of the projection 2b For example, it may be described as a shape based on a round column or tube, but the shape of the projection can be a shape based on a rectangular column or tube. The specific shapes of the projection 2b , the deepening 23 or the in-depth study 24 They can be modified according to their intended use. That is, the shape of the tube is not limited to a cylindrical shape, but can be rectangular or any other column with a specific cross-sectional shape.

[0135] It should be noted that if the tube section is to be compressed, the tube section should preferably be cylindrical. 2) The embodiment describes an example in which the tube section 22 is compressed after the one attached to the cover plate 2 trained advantage 2b into the through hole 31 was fitted into the positioning section 10b as well as the positioning section 16b the upper seal 10 and the upper seal 16 is formed. However, a design is conceivable in which the advantage 2b is fitted into the through hole and rotation of the upper seal 10 as well as the upper seal 16 for example, without compressing the pipe section. 3) The embodiment describes an example in which a single projection 2b for example, for a single top seal 10is present. However, a multitude of protrusions can occur. 2b for a single top seal 10 be present and interact to rotate the upper seal 10 to prevent. 4) The embodiment describes an example in which the cover plate 2 The element, which is a metal plate component, is made of aluminum. However, any type of metal material suitable for forming can be used in the present invention. For example, stainless steel is conceivable. 5) The embodiment represents an exemplary energy storage element 100 However, it is planned to integrate a capacitor or other energy storage device into the energy storage element. 100 to integrate. 6) The embodiment describes an example in which the component that is connected to the projection 2b The intervention occurs, the through hole 31However, a simple recess (an engagement recess) or notch, for example, can be designed in such a way that it aligns with the projection. 2b comes into intervention. 7) The embodiment describes an example where the projection 2b on the outer surface of the cover plate 2 of the container 101 is formed. However, the projection can be located on an inner surface of the cover plate. 2 of the container 101 or on the cladding 1 This setup can be used when the advantage is present. 2b on the lower seal 12 and the lower seal 17 is fixed or when the electrode connection NT and the electrode connection PT are attached to the casing 1 are available. 8) The embodiment describes an example where the projection 2b on the container 101 of the energy storage element 100is trained. However, the advantage can 2b be formed on another metal component that is part of the energy storage element 100 is included. For example, by the lead 2b at the upper ends of the current collector 4 and the power collector 6 is formed and the intervention recesses on the lower seal 12 as well as the lower seal 17 be trained, the advantage 2b can be used to power the electricity collector 4 and the power collector 6 to position and prevent rotation. 9) The embodiment describes an example in which the cover plate 2 , where the lead 2b is designed to describe the structure of the individual parts on the side of the cover plate 2 of the energy storage element 100 and the structure of the container 101serves. However, a large number of plate elements and individual parts can be used in the present invention. Reference symbol list 2 Cover plate 2b advantage 10, 16 Seal 21 Basic section 22 Tube section 23, 24 In-depth study 31 Through hole NT, PT electrode connection QUOTES INCLUDED IN THE DESCRIPTION

[0136] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0137] JP 2012-015809

[0001] JP 2012-280115

[0001] JP 2001-340928

[0005]

Claims

[1] Energy storage element comprising a metal component, which is a metal plate element, comprising a projection extending from a face of the metal component and forming part of a container, wherein the projection includes a tubular section present at a front end of the projection and in an extension direction intersecting the face, and a base section, which is solid or tubular and extends from the face of the metal component in the extension direction to the tubular section, wherein a wall thickness of the base section, if tubular, is greater than a wall thickness of the tubular section. [2] Energy storage element according to claim 1, wherein the base section and the tube section are seamless and have a common central axis. [3] Energy storage element according to claim 1, wherein a wall of the projection is designed such that its thickness gradually decreases in the direction of extension from a base end to a front end. [4] Energy storage element according to any one of claims 1 to 3, comprising: a recess having a closed end, formed on a surface of one side of the metal component opposite a surface on which the projection is formed, and arranged such that, viewed in the direction of extension, it overlaps a position of the projection. [5] Energy storage element according to claim 4, wherein a distance between a bottom of the depression and the front end of the projection in the direction of extension is shorter than a distance between the surface of the metal component in which the projection is formed and the front end of the projection in the direction of extension. [6] Energy storage element according to claim 4, wherein the recess is designed such that, viewed in the direction of expansion, it is wider than the projection. [7] Energy storage element according to claim 4, wherein the thickness of the metal component is more than twice the depth of the depression. [8] Energy storage element according to claim 1, wherein the thickness of a wall of the tube section gradually decreases from a base end to the front end of the projection. [9] Energy storage element according to one of claims 1 to 3, wherein the depression is present on the same surface of the metal component as the projection. [10] Energy storage element according to claim 1, wherein the projection engages with a seal that is present between an electrode terminal and the metal component. [11] Energy storage element according to claim 10, wherein the tube section of the projection is fitted into a through hole formed in the seal and compressed. [12] Energy storage element according to claim 11, wherein the seal is provided with an inclined surface which gradually inclines outwards from the inside of the through-hole engaging with the compressed tube section away from the surface of the metal component. [13] Energy storage element according to claim 12, wherein a distance between the inclined surface and the surface of the metal component is greater than a distance between the base section and the surface of the metal component. [14] Metal component, which is a metal plate element, comprising the metal component: a projection extending from a surface of the metal plate element, where the advantage includes: a tubular section present at a front end of the projection in an extensional direction that intersects the surface; and a base section which is solid or tubular and extends in the direction of expansion from the surface of the metal component to the tubular section, wherein the base section, if tubular, has a wall thickness greater than the wall thickness of the tubular section. [15] Method for manufacturing an energy storage element comprising as a section of a container a metal component which is a metal plate element and includes a projection extending from a surface of the metal component, the method comprising: Pressing the metal plate element to form the projection, which includes a) a tubular section present at a front end of the projection in an extensional direction intersecting the surface, and b) a base section that is solid or tubular in shape and extends from the surface of the metal component in the extensional direction to the tubular section, wherein a wall thickness of the base section, if tubular, is greater than a wall thickness of the tubular section. [16] Method for manufacturing an energy storage element according to claim 15, further comprising: Compression of the tube section of the projection when the projection is fitted into a through-hole formed in a seal located between an electrode terminal and the metal component.