Battery cover plate forming process, battery cover plate and cover plate assembly assembling process

Abstract

The invention provides a battery cover plate forming process, a battery cover plate and a cover plate assembly assembling process. The battery cover plate forming process comprises the steps that a plate body is provided, and the plate body is provided with a first surface and a second surface which are opposite in the thickness direction of the plate body; forming a first through hole in the plate body, wherein the first through hole penetrates through the first surface and the second surface; the area, surrounding the first through hole, of the plate body is subjected to flanging treatment to form a cylindrical flanging, and the cylindrical flanging protrudes out of the first surface of the plate body in the axial direction of the first through hole; and the barrel-shaped turned-over edge is upset to be flat, so that a barrel body and a flange located in the barrel body are formed. The battery cover plate forming process can solve the problem of high processing cost of the existing battery cover plate.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cover plate forming process, a battery cover plate and a cover plate assembly process. Background Art

[0002] Batteries have the advantages of long cycle life, high energy density, high voltage, and low self-discharge. With the widespread popularization and application of digital electronic products and power storage products, especially in recent years, driven by the continued rapid expansion of the new energy vehicle market, the demand for batteries has soared and the market size has grown rapidly. Batteries are gradually occupying the market in consumer electronics, electric vehicles, automobiles, power tools, smart grids and other fields, and have broad application prospects.

[0003] The battery includes a cell, a shell and a cover assembly. The cover assembly can be connected to the shell. The cell can be located in the internal space formed by the shell and the cover assembly. The shell can protect the cell from damage. The cover assembly can include a cover, a pole, a seal, and an insulating member. The pole, the seal, and the insulating member are fixedly mounted on the cover. Therefore, a fixing structure is usually provided on the cover for fixed connection with components such as the pole, the seal, and the insulating member.

[0004] In the related art, the fixing structure and the cover plate need to be processed separately, and then the fixing structure is fixed to the cover plate by welding. However, on the one hand, the welding capacity is low, which easily leads to an increase in production costs. On the other hand, the cover plate and the fixing structure are made of at least two types of materials. The increase in material types easily leads to an increase in maintenance costs. Summary of the invention

[0005] The present application provides a battery cover plate forming process, a battery cover plate and a cover plate assembly process, which can solve the problem of high processing cost of existing battery cover plates.

[0006] On the one hand, the present application provides a battery cover forming process, which includes:

[0007] Providing a plate body, wherein along a thickness direction of the plate body, the plate body has a first surface and a second surface opposite to each other;

[0008] A first through hole is formed on the plate body, wherein the first through hole passes through the first surface and the second surface;

[0009] Performing flanging processing on the area of ​​the plate body surrounding the first through hole to form a cylindrical flanging, wherein the cylindrical flanging protrudes from the first surface of the plate body along the axial direction of the first through hole;

[0010] The cylindrical flange is upset to form a cylindrical body and a flange located inside the cylindrical body.

[0011] The battery cover plate forming process provided by the present application can produce a battery cover plate with an integrally formed structure. That is, the plate body, the cylinder body and the flange can be an integral structure. The cylinder body and the flange can be used for fixed connection with components such as poles, seals, and insulating parts. Therefore, the battery cover plate formed by the battery cover plate forming process of the present application does not need to be additionally provided with other structures, and can also be fixedly connected with other components, thereby reducing the types of parts processing and processing procedures, which is conducive to reducing the processing cost of the battery cover plate.

[0012] According to an embodiment of the present application, the flange is an annular structure, the flange extends along the inner wall of the cylinder toward the center of the first through hole, and the inner wall of the flange surrounds and forms the second through hole.

[0013] According to one embodiment of the present application, after the cylindrical flange is upset to form a cylinder and a flange located inside the cylinder, the method comprises:

[0014] An annular groove is punched on the flange, and the opening direction of the annular groove is the same as the protruding direction of the cylindrical flange.

[0015] According to one embodiment of the present application, the annular groove is formed by stamping on the flange, and the opening direction of the annular groove is the same as the protruding direction of the cylindrical flange, including:

[0016] The flange is stamped along the axial direction of the second through hole and along the inner wall of the cylinder, the annular groove has a first side wall and a second side wall, along the axial direction of the second through hole, the orthographic projection of the first side wall of the annular groove coincides with the orthographic projection of the inner wall of the cylinder, and along the radial direction of the second through hole, there is a gap between the second through hole and the second side wall.

[0017] According to one embodiment of the present application, after the annular groove is stamped on the flange and the opening direction of the annular groove is the same as the protruding direction of the cylindrical flange, the method includes:

[0018] A third through hole is formed by punching a hole on the upper side of the cylinder.

[0019] According to an embodiment of the present application, there are multiple third through holes, and along the circumference of the first through hole, the multiple third through holes are evenly distributed on the cylinder.

[0020] According to one embodiment of the present application, after punching a hole on the upper side of the cylinder to form the third through hole, the method includes:

[0021] Waste materials are extracted from the inner space formed by the cylinder.

[0022] According to one embodiment of the present application, before the cylindrical flange is upset to form a cylinder and a flange located inside the cylinder, the method includes:

[0023] The surface of the cylindrical flange away from the plate body is leveled.

[0024] In the second aspect, the present application provides a battery cover plate, which is manufactured by the battery cover plate forming process in any of the above embodiments. The battery cover plate includes a plate body, a cylinder body and a flange. Along the thickness direction of the plate body, the cylinder body penetrates the plate body. Along the circumference of the cylinder body, the flange is arranged on the inner wall of the cylinder body. The inner wall of the flange is surrounded to form a third through hole. The plate body, the cylinder body and the flange are an integrated structure.

[0025] In a third aspect, the present application provides a cover plate assembly assembly process, which includes:

[0026] A battery cover is provided, the battery cover comprising a plate body, a cylinder body and a flange, the cylinder body penetrates the plate body along the thickness direction of the plate body, the flange is arranged on the inner wall of the cylinder body along the circumference direction of the cylinder body, the inner wall of the flange is surrounded to form a third through hole, and the plate body, the cylinder body and the flange are an integrated structure;

[0027] The elastic sealing member is arranged correspondingly on the flange;

[0028] The pole is arranged on the elastic seal, and the elastic seal insulates and isolates the pole and the battery cover;

[0029] An integrated injection molding process is adopted to connect the battery cover, the elastic sealing component and the pole through an injection molding connector.

[0030] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of the technical solutions, other technical problems that can be solved by the pool cover forming process, battery cover and cover assembly process provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] Figure 1 This is a schematic diagram of a battery cover forming process flow diagram of an embodiment of the present application;

[0033] Figure 2A schematic diagram of a battery cover forming process flow diagram of another embodiment of the present application;

[0034] Figure 3 A schematic diagram of a structure formed in step S102 of a battery cover plate forming process according to an embodiment of the present application;

[0035] Figure 4 A schematic diagram of a structure formed in step S103 of a battery cover plate forming process according to an embodiment of the present application;

[0036] Figure 5 A schematic diagram of a structure formed in step S104 of a battery cover plate forming process according to an embodiment of the present application;

[0037] Figure 6 A schematic diagram of a structure formed in step S105 of a battery cover plate forming process according to an embodiment of the present application;

[0038] Figure 7 A schematic diagram of a structure formed in step S106 of a battery cover plate forming process according to an embodiment of the present application;

[0039] Figure 8 A schematic diagram of a structure formed in step S108 of a battery cover plate forming process according to an embodiment of the present application;

[0040] Fig. 9 This is a schematic diagram of the axial structure of a battery cover plate according to an embodiment of the present application;

[0041] Fig.10 This is a schematic diagram of the front structural view of a battery cover according to an embodiment of the present application;

[0042] Fig.11 This is a schematic diagram of the assembly process of the cover plate assembly according to one embodiment of the present application;

[0043] Fig.12 It is a schematic diagram of a partial cross-sectional structure of a cover plate assembly according to an embodiment of the present application.

[0044] Description of reference numerals:

[0045] 100-battery cover;

[0046] 110-plate body; 110a-first through hole;

[0047] 111- first surface; 112- second surface;

[0048] 120-cylindrical flanging;

[0049] 130- flange; 130a- second through hole; 130b- annular groove;

[0050] 140-cylinder; 140a-third through hole;

[0051] 200-cover plate assembly;

[0052] 210-elastic seal; 220-pole; 230-injection molded connector;

[0053] X-thickness direction.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0056] The battery cover forming process of the embodiment of the present application can be used to process the battery cover. The battery cover can be used to assemble with the battery cell and the shell to form a battery. The battery of the embodiment of the present application may include a lithium-ion secondary battery, a lithium-sulfur battery or a sodium-lithium-ion battery, etc. This is not limited in this application. Batteries are generally divided into cubic square batteries and soft-pack batteries according to the packaging method, and this embodiment of the present application does not limit this.

[0057] The battery of the embodiment of the present application can power mobile devices such as vehicles, ships, and small aircraft. Taking a vehicle as an example, the vehicle of the present application can be a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. The battery can be used as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. Exemplarily, the battery provides electrical energy for the drive motor. The drive motor is connected to the wheels on the vehicle through a transmission mechanism to drive the vehicle to move. Specifically, the battery can be horizontally arranged at the bottom of the vehicle.

[0058] The battery includes a cover plate assembly, a battery cell and a shell. The cover plate assembly may include a cover plate, a pole, a seal and an insulating member. The battery cell may lead out two pole lugs with opposite polarities. The pole lug may be connected to the pole via a connecting sheet so that the pole and the pole lug may have the same electrical properties. The pole may be used to electrically connect to an external circuit to power an external device.

[0059] Since the poles and insulating parts are both arranged on the cover plate, a fixing structure is usually arranged on the cover plate for fixing and connecting with the poles, seals, insulating parts and other parts. In the related art, the fixing structure and the cover plate need to be processed separately, and then the fixing structure is fixed to the cover plate by welding. However, on the one hand, the welding capacity is low, which easily leads to an increase in production costs. On the other hand, the cover plate and the fixing structure are made of at least two types of materials. The increase in the types of materials easily leads to an increase in maintenance costs.

[0060] Based on the above technical problems, the applicant has improved the existing battery cover molding process. Through the battery cover molding process of the present application, a battery cover with an integrated molding structure can be produced. That is, the plate body, the cylinder body and the flange can be an integrated structure. The cylinder body and the flange can be used for fixed connection with components such as poles, seals, and insulating parts. Therefore, the battery cover formed by the battery cover molding process of the present application does not need to be additionally provided with other structures, and can also be fixedly connected with other components, thereby reducing the types of parts processing and processing procedures, which is conducive to reducing the processing cost of the battery cover.

[0061] The battery cover plate forming process of the present application has a simple processing technology and is easy to operate.

[0062] The battery cover plate forming process, the battery cover plate and the cover plate assembly process provided in the present application are described with reference to the accompanying drawings and in combination with specific embodiments.

[0063] See also Figure 1 and Figure 2 As shown, the battery cover plate forming process of the embodiment of the present application may include the following steps.

[0064] S101 , providing a plate body 110 . Along a thickness direction X of the plate body 110 , the plate body 110 has a first surface 111 and a second surface 112 opposite to each other.

[0065] In some examples, the plate may be cut first. For example, in the embodiment of the present application, the plate may be processed by laser cutting, shearing, molding, etc. to form the plate body 110 .

[0066] Exemplarily, the plate body 110 may be a long strip structure.

[0067] See also Figure 3As shown, S102 , a first through hole 110 a is formed on the plate body 110 . The first through hole 110 a passes through the first surface 111 and the second surface 112 .

[0068] In some examples, the embodiments of the present application may use a stamping process to form the first through hole 110 a on the plate body 110 .

[0069] In some examples, the shape of the first through hole 110a may be circular, square, or polygonal, which is not limited in the present application.

[0070] See also Figure 4 As shown, S103, the area of ​​the plate body 110 surrounding the first through hole 110a is subjected to flanging processing to form a cylindrical flanging 120. The cylindrical flanging 120 protrudes from the first surface 111 of the plate body 110 along the axial direction of the first through hole 110a.

[0071] In some examples, the embodiment of the present application may use a stamping process to flange the area surrounding the first through hole 110a on the plate body 110. The material of the area surrounding the first through hole 110a on the plate body 110 may bulge toward one side of the thickness direction X of the plate body 110 to form a cylindrical flange 120 with a wall thickness. The wall thickness of the cylindrical flange 120 may be the same as the thickness of the plate body 110.

[0072] In some examples, the shape of the cylindrical flange 120 may be the same as the shape of the first through hole 110a. For example, if the first through hole 110a is circular, the shape of the cylindrical flange 120 may be a circular cylindrical structure. If the first through hole 110a is square, the shape of the cylindrical flange 120 may be a square cylindrical structure.

[0073] In some examples, the axial direction of the first through hole 110 a and the thickness direction X of the plate body 110 may be in the same direction.

[0074] See also Figure 5 As shown, S104 , the cylindrical flange 120 is upset to form a cylindrical body 140 and a flange 130 located inside the cylindrical body 140 .

[0075] In some examples, a force may be applied to the partial cylindrical flange 120 along the axial direction of the first through hole 110a to flatten the partial cylindrical flange 120, so that the partial cylindrical flange 120 may be upset to form a flange 130 with a certain thickness in the first through hole 110a.

[0076] The upset area may refer to a portion of the inner wall of the cylindrical flange 120. It is understood that the wall thickness of the cylindrical body 140 formed after upset is less than the wall thickness of the cylindrical flange 120. The thickness of the flange 130 is less than the thickness of the plate body 110, and along the axial direction of the first through hole 110a, the surface of the flange 130 away from the end of the cylindrical body 140 may be flush with the second surface 112 of the plate body 110.

[0077] In summary, the battery cover plate 100 formed by the battery cover plate forming process of the embodiment of the present application does not need to be processed again through other processes such as riveting and welding. Therefore, the number of processing steps and parts can be saved, which is conducive to reducing product production costs.

[0078] In some examples, since the battery cover 100 formed by the battery cover molding process of the embodiment of the present application is an integrated structure, the battery cover 100 can be directly assembled with the pole 220, seals and other components to form a cover assembly 200, and sealed and connected to the shell to complete the assembly of the battery.

[0079] In some possible implementations, see Figure 5 As shown, the flange 130 of the embodiment of the present application is annular in structure. The flange 130 extends along the inner wall of the cylinder 140 toward the center of the first through hole 110a. The inner wall of the flange 130 is surrounded to form a second through hole 130a.

[0080] The tabs led out of the cell can be connected to the pole 220 via a connecting piece. The connecting piece can pass through the second through hole 130a to be electrically connected to the pole 220.

[0081] In some examples, the axial direction of the second through hole 130a and the axial direction of the first through hole 110a may be in the same direction. The center line of the second through hole 130a and the center line of the first through hole 110a may coincide with each other.

[0082] In some possible implementations, see Figure 6 As shown, after step S104, the following steps are also included:

[0083] S105 , punching an annular groove 130 b on the flange 130 . The opening direction of the annular groove 130 b is the same as the protruding direction of the cylindrical flange 120 .

[0084] In some examples, along the axial direction of the second through hole 130 a , the flange 130 may be punched in a direction from the second surface 112 to the first surface 111 to form an annular groove 130 b on the flange 130 .

[0085] The annular groove 130b formed in the embodiment of the present application can be used to install a seal. Part of the seal can be located in the annular groove 130b. Then the pole 220 is placed on the seal to insulate and isolate the pole 220 and the battery cover 100 through the seal, so that the pole 220 and the battery cover 100 can have different conductivities. For example, the pole 220 can have the same polarity as the positive electrode. The battery cover 100 can have the same polarity as the negative electrode, or it can have no electrode polarity.

[0086] In some achievable embodiments, step S105 may include punching the flange 130 along the axial direction of the second through hole 130a and along the inner wall of the cylinder 140. The annular groove 130b has a first side wall and a second side wall. Along the axial direction of the second through hole 130a, the orthographic projection of the first side wall of the annular groove 130b coincides with the orthographic projection of the inner wall of the cylinder 140, and along the radial direction of the second through hole 130a, there is a gap between the second through hole 130a and the second side wall.

[0087] In some examples, the width of the annular groove 130b can match the width of the seal. Along the radial direction of the second through hole 130a, the first side wall and the second side wall are arranged opposite to each other. The second side wall of the annular groove 130b can have a limiting effect on the seal to reduce the possibility of the seal shaking in the annular groove 130b, which is conducive to improving the connection stability between the seal and the battery cover 100.

[0088] It should be noted that the depth of the annular groove 130b can be less than the thickness of the seal to reduce the possibility that the seal is completely located in the annular groove 130b after being compressed, and the pole 220 located on the seal contacts the flange 130, resulting in electrical conduction between the battery cover 100 and the pole 220 and a short circuit.

[0089] In some examples, along the axial direction of the second through hole 130a, punching may be performed along the inner wall of the cylinder 140 toward the plate 110. The first side wall of the annular groove 130b may fit the inner wall of the cylinder 140.

[0090] In some possible implementations, see Figure 7 As shown, after step S105, the following steps may also be included:

[0091] S106 , punching a hole on the upper side of the cylinder 140 to form a third through hole 140 a .

[0092] In some examples, the axial direction of the third through hole 140a may be perpendicular to the axial direction of the second through hole 130a. The third through hole 140a may be formed on the cylinder 140 by a stamping process.

[0093] In some examples, the battery cover 100, the seal and the pole 220 of the embodiment of the present application can be formed into an integral component by an injection molding process, so as to be electrically connected to the battery cell and packaged with the shell, thereby completing the assembly process of the battery. The battery cover 100, the seal and the pole 220 can be formed into an integral component by an injection molding process, which is conducive to saving assembly processes and improving assembly efficiency.

[0094] In some examples, the battery cover 100, the seal and the pole 220 can be placed in a mold, and then the mold can be injected with injection molding glue. The injection molding glue can be filled in the reserved space between the cylinder 140 and the pole 220 so that the injection molding glue can be fully in contact with the inner wall of the cylinder 140, the pole 220 and the seal. The injection molding glue can also be coated on the outer wall of the cylinder 140 and connected to the first surface 111 of the plate 110 facing the cylinder 140. After the injection molding glue solidifies, the cover assembly 200 consisting of the battery cover 100, the seal and the pole 220 can be formed.

[0095] The interior of the third through hole 140a of the embodiment of the present application can also be filled with injection molding glue. It is understandable that the seal is usually elastic. The pole 220 can compress the seal to achieve the sealing function of the seal. After the injection molding glue solidifies, there is an interaction force between the pole 220 and the seal. The seal can apply an elastic force to the pole 220. The direction of action of the elastic force is the direction from the second surface 112 to the first surface 111. The inner wall of the third through hole 140a can constrain the injection molding glue inside it to move along the thickness direction X of the plate body 110, thereby reducing the possibility of the pole 220 sliding in the axial direction of the second through hole 130a away from the plate body 110 under the action of the elastic force.

[0096] In some possible implementations, see Figure 7 As shown, the number of the third through holes 140 a formed in the embodiment of the present application can be multiple. Along the circumference of the second through hole 130 a, the multiple third through holes 140 a are evenly distributed on the cylinder 140 .

[0097] In some examples, the second through hole 130a formed in the embodiment of the present application may be in a square shape. The cylinder 140 may have four side walls, and each side wall may have at least one third through hole 140a.

[0098] In some examples, the third through hole 140a may be a circular hole, a square hole, or a round hole, which is not limited in the present application.

[0099] In some possible implementations, see Figure 2 As shown, after step S106, the following steps may also be included:

[0100] S107, extracting waste from the inner space formed by the cylinder 140.

[0101] In some examples, the waste generated by the third through hole 140a formed by the stamping process is easily attached to the inner wall of the cylinder 140. On the one hand, the waste on the inner wall of the cylinder 140 is easy to damage the internal structure of the battery and affect the assembly between the battery cover 100 and other parts. On the other hand, the waste is a metal material and has conductivity, which is easy to cause a short circuit. Therefore, it is necessary to remove the waste in the cylinder 140.

[0102] In some examples, waste materials in the cylinder 140 may be extracted by a waste extraction mechanism.

[0103] For some examples, see Figure 8 As shown, after the step S107, the step S108 may be further included, namely, fine punching the second through hole 130a to meet the size requirement of the second through hole 130a.

[0104] In some possible implementations, see Figure 2 As shown, before step S104, the following steps may also be included:

[0105] S109 , leveling the surface of the cylindrical flange 120 away from the plate body 110 to improve the flatness of the surface of the cylindrical flange 120 away from the plate body 110 .

[0106] The present application also provides a battery cover 100, see Fig. 9 and Fig.10 As shown, the battery cover plate 100 can be made by the battery cover plate forming process of any of the above embodiments. The battery cover plate 100 includes a plate body 110, a cylinder 140 and a flange 130. Along the thickness direction X of the plate body 110, the cylinder 140 penetrates the plate body 110. Along the circumference of the cylinder 140, the flange 130 is arranged on the inner wall of the cylinder 140. The inner wall of the flange 130 is surrounded to form a third through hole 140a. The plate body 110, the cylinder 140 and the flange 130 are an integrated structure.

[0107] The battery cover plate 100 of the embodiment of the present application is an integrated structure, so the processing steps of welding the cylinder 140 and the flange 130 to the plate body 110 can be saved, and the types of parts can be reduced, which is beneficial to reducing the processing cost of the battery cover plate 100.

[0108] The present application also provides a cover plate assembly assembly process, see Fig.11 and Fig.12 As shown, the following steps may be included:

[0109] S201, provide a battery cover 100. The battery cover 100 includes a plate body 110, a cylinder body 140 and a flange 130. The cylinder body 140 penetrates the plate body 110 along the thickness direction X of the plate body 110. The flange 130 is arranged on the inner wall of the cylinder body 140 along the circumference of the cylinder body 140. The inner wall of the flange 130 is surrounded to form a third through hole 140a. The plate body 110, the cylinder body 140 and the flange 130 are an integrated structure.

[0110] S202 , disposing the elastic sealing member 210 corresponding to the flange 130 on the battery cover 100 .

[0111] S203 , placing the pole 220 on the elastic seal 210 . The elastic seal 210 insulates and isolates the pole 220 and the battery cover 100 .

[0112] S204 , using an integrated injection molding process to connect the battery cover 100 , the elastic sealing member 210 and the pole 220 via an injection molding connector 230 .

[0113] The cover plate assembly assembly process provided in the embodiment of the present application is simple to operate, and the cover plate assembly 200 formed by this process is a whole, which can effectively save assembly steps and improve assembly efficiency.

[0114] It should be noted here that the numerical values ​​and numerical ranges involved in this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0115] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0116] In the description of the present application, it should be understood that the terms used, such as “center”, “length”, “width”, “thickness”, “top”, “bottom”, “up”, “down”, “left”, “right”, “front”, “back”, “vertical”, “horizontal”, “inside”, “outside”, “axial”, “circumferential”, etc., to indicate positions or positional relationships are based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the position or component referred to must have a specific orientation, a specific structure and operation, and therefore should not be understood as a limitation on the present invention.

[0117] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0118] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0119] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0120] The term "plurality" in this article refers to two or more than two. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship; in a formula, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0121] It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0122] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A battery cover forming process, characterized in that: include: Providing a plate body, wherein along a thickness direction of the plate body, the plate body has a first surface and a second surface opposite to each other; A first through hole is formed on the plate body, wherein the first through hole passes through the first surface and the second surface; Performing flanging processing on the area of ​​the plate body surrounding the first through hole to form a cylindrical flanging, wherein the cylindrical flanging protrudes from the first surface of the plate body along the axial direction of the first through hole; The cylindrical flange is upset to form a cylindrical body and a flange located inside the cylindrical body.

2. The battery cover plate forming process according to claim 1, characterized in that: The flange is an annular structure, and the flange extends along the inner wall of the cylinder toward the center of the first through hole. The inner wall of the flange surrounds and forms a second through hole.

3. The battery cover plate forming process according to claim 2, characterized in that: After the cylindrical flange is upset to form a cylinder and a flange located inside the cylinder, the method comprises: An annular groove is punched on the flange, and the opening direction of the annular groove is the same as the protruding direction of the cylindrical flange.

4. The battery cover plate forming process according to claim 3, characterized in that: The annular groove is formed by punching on the flange, and the opening direction of the annular groove is the same as the protruding direction of the cylindrical flange, including: The flange is stamped along the axial direction of the second through hole and along the inner wall of the cylinder, the annular groove has a first side wall and a second side wall, along the axial direction of the second through hole, the orthographic projection of the first side wall of the annular groove coincides with the orthographic projection of the inner wall of the cylinder, and along the radial direction of the second through hole, there is a gap between the second through hole and the second side wall.

5. The battery cover plate forming process according to claim 3, characterized in that: After the annular groove is formed by punching on the flange, and the opening direction of the annular groove is the same as the protruding direction of the cylindrical flange, the method comprises: A third through hole is formed by punching a hole on the upper side of the cylinder.

6. The battery cover plate forming process according to claim 5, characterized in that: There are multiple third through holes, and along the circumference of the first through hole, the multiple third through holes are evenly distributed on the cylinder.

7. The battery cover plate forming process according to claim 5, characterized in that: After punching a hole on the upper side of the cylinder to form a third through hole, the method comprises: Waste materials are extracted from the inner space formed by the cylinder.

8. The battery cover plate forming process according to claim 1, characterized in that: The process of upsetting the cylindrical flange to form a cylindrical body and a flange inside the cylindrical body comprises: The surface of the cylindrical flange away from the plate body is leveled.

9. A battery cover, characterized in that: The battery cover plate includes a plate body, a cylinder body and a flange. Along the thickness direction of the plate body, the cylinder body penetrates the plate body. Along the circumference of the cylinder body, the flange is arranged on the inner wall of the cylinder body. The inner wall of the flange is surrounded to form a third through hole. The plate body, the cylinder body and the flange are an integrated structure.

10. A cover plate assembly process, characterized in that: include: A battery cover is provided, the battery cover comprising a plate body, a cylinder body and a flange, the cylinder body penetrates the plate body along the thickness direction of the plate body, the flange is arranged on the inner wall of the cylinder body along the circumference direction of the cylinder body, the inner wall of the flange is surrounded to form a third through hole, and the plate body, the cylinder body and the flange are an integrated structure; The elastic sealing member is arranged correspondingly on the flange; The pole is arranged on the elastic seal, and the elastic seal insulates and isolates the pole and the battery cover; An integrated injection molding process is adopted to connect the battery cover plate, the elastic sealing member and the pole via an injection molding connector.

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