Batteries and their manufacturing methods, battery devices

Abstract

This disclosure relates to the field of battery technology, specifically to a battery and its manufacturing method and device. The battery includes a housing and a cover plate. The housing has an open cavity. The cover plate is disposed at the opening of the housing to seal the opening. The housing includes a main body and a first flange. The first flange is connected to the end of the main body near the cover plate and extends away from the cover plate. The cover plate includes a main body and a second flange. The second flange is disposed at the edge of the main body and extends towards the main body near the housing. The first flange and the second flange are welded together. This avoids heat damage to the terminal assembly or cell caused by welding the housing and cover plate, improving the battery yield and safety.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more specifically, to a battery, a method for manufacturing the same, and a battery device. Background Technology

[0002] With the development and advancement of technology, the application of electric vehicles is becoming increasingly widespread. Electric vehicles are often equipped with battery packs to provide power. These battery packs typically contain multiple batteries, including a casing, battery cells, and terminal assemblies. The battery cells are housed within the casing, and the terminal assemblies are located within the casing and connected to the battery cells. During the welding process of the battery casing, the heat generated can easily damage the battery cells or terminal assemblies, thereby reducing the battery yield.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this disclosure is to provide a battery and a method for manufacturing the same, as well as a battery device, thereby improving the yield rate of the battery to at least a certain extent.

[0005] According to a first aspect of this disclosure, a battery is provided, the battery comprising:

[0006] A housing component having an open receiving cavity;

[0007] A cover plate is provided at the opening of the housing component to seal the opening;

[0008] The housing component includes a housing body and a first flange. The first flange is connected to one end of the housing body near the cover plate and extends toward the housing body away from the cover plate. The cover plate includes a plate body and a second flange. The second flange is disposed at the edge of the plate body and extends toward the plate body toward the housing component. The first flange and the second flange are welded together.

[0009] The battery provided in this embodiment includes a housing and a cover plate. A first flange extending away from the cover plate is provided on the housing, and a second flange extending towards the housing is provided on the edge of the cover plate. The housing and the cover plate are welded together by the first flange and the second flange, so that the weld between the housing and the cover plate is far away from the terminal assembly and the battery cell. This avoids the heat generated during the welding of the housing and the cover plate from damaging the terminal assembly or the battery cell, thereby improving the yield and safety of the battery.

[0010] According to a second aspect of this disclosure, a battery device is provided, the battery device including a battery assembly, the battery assembly comprising:

[0011] The aforementioned battery;

[0012] An insulating bracket is fitted over the battery.

[0013] The battery device provided in this embodiment includes a battery, comprising a housing and a cover. A first flange extending away from the cover is provided on the housing, and a second flange extending towards the housing is provided on the edge of the cover. The housing and cover are welded together via the first and second flanges, ensuring that the weld joint between the housing and cover is away from the terminal assembly and the battery cell. This prevents heat generated during welding from damaging the terminal assembly or the battery cell, improving the yield and safety of the battery device. Furthermore, an insulating bracket is fitted onto the battery to insulate it from adjacent conductive devices, further enhancing the safety of the battery device.

[0014] According to a third aspect of this disclosure, a method for manufacturing a battery is provided, the method comprising:

[0015] Provide the first and second boards;

[0016] The first sheet material is stamped to form a cover plate with a second flange on the edge;

[0017] The second sheet is stamped along a first direction to form a first flange at the edge of the second sheet, and the second sheet is stamped along a second direction to form a shell body, thereby forming a shell part with an accommodating cavity and a first flange, wherein the first direction and the second direction are opposite;

[0018] The cover plate is installed on the housing component, and the first flange and the second flange are welded together.

[0019] The battery manufacturing method provided in this disclosure involves stamping a first sheet metal to form a cover plate with a second folded edge, and then stamping a second sheet metal twice in opposite directions to form a receiving cavity and a first folded edge. The housing and cover plate are then welded together by the first and second folded edges. This ensures that the weld joint between the housing and cover plate is far from the terminal assembly and the battery cell, thereby preventing heat generated during welding from damaging the terminal assembly or the battery cell, thus improving the yield and safety of the battery device. Furthermore, the use of an insulating bracket on the battery achieves insulation between the battery and adjacent conductive devices, further enhancing the safety of the battery device.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 A schematic diagram of the structure of a battery provided for an exemplary embodiment of this disclosure;

[0023] Figure 2 A schematic diagram of the structure of a housing component provided for an exemplary embodiment of this disclosure;

[0024] Figure 3 A schematic diagram of the structure of a cover plate provided for an exemplary embodiment of this disclosure;

[0025] Figure 4 A schematic diagram of the structure of a battery device provided for an exemplary embodiment of this disclosure;

[0026] Figure 5 A schematic diagram of the structure of an insulating support provided for an exemplary embodiment of this disclosure;

[0027] Figure 6 A schematic diagram of another insulating support provided as an exemplary embodiment of this disclosure;

[0028] Figure 7 A schematic diagram of the structure of a battery device provided for an exemplary embodiment of this disclosure;

[0029] Figure 8 A partial enlarged view of an apparatus provided for an exemplary embodiment of this disclosure;

[0030] Figure 9 A flowchart illustrating a method for manufacturing a battery, provided as an exemplary embodiment of this disclosure. Detailed Implementation

[0031] The technical solutions in the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of this disclosure.

[0032] In the description of this disclosure, unless otherwise expressly specified and limited, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term “multiple” refers to two or more; and the term “and / or” includes any and all combinations of one or more associated listed items. In particular, references to “the / described” object or “a” object are also intended to indicate one of a possible plurality of such objects.

[0033] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0034] Furthermore, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this disclosure are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this disclosure. It should also be understood that, in the context of a reference to an element or feature being connected to another element(s) "upper," "lower," "inner," or "outer," it can be directly connected to the other element(s) "upper," "lower," "inner," or "outer," or indirectly connected to the other element(s) "upper," "lower," "inner," or "outer" through an intermediate element.

[0035] This exemplary embodiment of the disclosure first provides a battery 10, such as Figure 1 As shown, the battery 10 includes: a housing 11 and a cover plate 12. The housing 11 has an accommodating cavity with an opening; the cover plate 12 is disposed at the opening of the housing 11 to seal the opening; wherein, as... Figure 2 The housing component 11 includes a housing body 111 and a first flange 112. The first flange 112 is connected to the end of the housing body 111 near the cover plate 12, and extends from the housing body 111 away from the cover plate 12. Figure 3 As shown, the cover plate 12 includes a plate body 121 and a second flange 122. The second flange 122 is disposed on the edge of the plate body 121 and extends towards the plate body 121 in the direction close to the housing member 11. The first flange 112 and the second flange 122 are welded together.

[0036] The battery 10 provided in this embodiment includes a housing 11 and a cover plate 12. A first flange 112 extending away from the cover plate 12 is provided on the housing 11, and a second flange 122 extending towards the housing 11 is provided on the edge of the cover plate 12. The housing 11 and the cover plate 12 are welded together by the first flange 112 and the second flange 122, so that the weld between the housing 11 and the cover plate 12 is far away from the terminal assembly 13 and the battery cell. This avoids the heat generated during the welding of the housing 11 and the cover plate 12 from damaging the terminal assembly 13 or the battery cell, thereby improving the yield and safety of the battery.

[0037] The battery 10 provided in the embodiments of this disclosure will now be described in detail:

[0038] The housing component 11 and the cover plate 12 are connected to form a battery housing. The battery housing has an internal cavity in which a battery cell is disposed. A terminal assembly 13 is disposed on the battery housing. Part of the terminal assembly 13 is located outside the battery housing, and part of the terminal assembly 13 extends into the battery housing and is connected to the battery cell.

[0039] The housing component 11 includes a housing body 111 and a first flange 112. The first flange 112 is connected to the end of the housing body 111 near the cover plate 12 and extends towards the housing body 111 away from the cover plate 12. That is, the first flange 112 is provided at the open end of the housing body 111, and the first flange 112 extends towards the non-open end of the housing body 111.

[0040] The shell body 111 may include an end panel and a frame. The frame is located on the side of the end panel near the cover plate 12 and has a ring-shaped structure. The frame and the end panel enclose a receiving cavity. A first flange 112 is connected to the end of the frame away from the short panel and extends from the end of the frame away from the end panel toward the end panel. The first flange 112 is an outward flange, that is, the first flange 112 is located on the outer side of the frame, which refers to the side of the frame away from the receiving cavity. The frame may be formed by connecting multiple frame plates end to end, and the edges of the frame plates and the end panels correspond one-to-one.

[0041] The shell component 11 can be a one-piece molded structure, for example, it can be formed by stamping or casting. When the shell component 11 is formed by stamping, the blank can be stamped twice to form the shell body 111 and the first flange 112. During stamping, stamping is first performed along a first direction to form the first flange 112 on the edge of the blank, and then stamping is performed along a second direction to form the shell body 111. The first and second directions are opposite, and the blank can be a sheet metal, with the first and second directions perpendicular to the sheet metal. Of course, in practical applications, the shell component 11 can also be a split-form structure, for example, the shell body 111 and the first flange 112 are formed separately, and then connected by welding or other means. The embodiments disclosed herein are not limited to this.

[0042] The first flange 112 includes a connecting section 103 and a welding section 104. The connecting section 103 is connected to the end of the shell body 111 near the cover plate 12, and the connecting section 103 is located on the side of the shell body 111 away from the accommodating cavity. The welding section 104 is connected to the end of the connecting section 103 away from the shell body 111, and there is a gap between the welding section 104 and the shell body 111.

[0043] The connecting segment 103 is connected to the end of the frame away from the end panel, and extends outward from the edge of the frame (away from the receiving cavity). For example, when the connecting segment 103 is planar, it can be perpendicular to the frame. Alternatively, the connecting segment 103 can be curved, allowing for a smooth transition with the frame and the welding segment 104, avoiding stress concentration. The welding segment 104 is connected to the end of the connecting segment 103 away from the frame, and is used for welding to the cover plate 12. The welding segment 104 can be parallel to the frame, and a gap exists between it and the frame. This gap prevents heat generated during welding from being transferred to the battery cell, and also accommodates the welding socket during welding, facilitating the process.

[0044] For example, the battery provided in this embodiment can be a cuboid or approximately cuboid battery. Based on this, the main body 111 is a thin-walled cuboid shell with one open side, and the first flange 112 is a rectangular or approximately rectangular annular structure. The end panel is a rectangular plate, and the frame is formed by a first frame plate, a second frame plate, a third frame plate, and a fourth frame plate connected end-to-end. The first frame plate, the second frame plate, the third frame plate, and the fourth frame plate are each disposed on one side of the end panel. Furthermore, the first frame plate, the second frame plate, the third frame plate, and the fourth frame plate are perpendicular to the end panel.

[0045] The welding segment 104 includes a first welding surface, a second welding surface, a third welding surface, and a fourth welding surface, which are sequentially connected to form a ring structure. The first welding surface is located on the side of the first frame plate away from the receiving cavity, and is parallel to the first frame plate. The second welding surface is located on the side of the second frame plate away from the receiving cavity, and is parallel to the second frame plate. The third welding surface is located on the side of the third frame plate away from the receiving cavity, and is parallel to the third frame plate. The fourth welding surface is located on the side of the fourth frame plate away from the receiving cavity, and is parallel to the fourth frame plate.

[0046] The cover plate 12 includes a plate body 121 and a second flange 122. The second flange 122 is disposed at the edge of the plate body 121 and extends towards the plate body 121 in a direction close to the housing member 11. The plate body 121 seals the opening of the housing member 11, and the second flange 122 extends to and is welded to the first flange 112 to realize the connection between the housing member 11 and the cover plate 12.

[0047] The second flange 122 is at least partially opposite to the side of the welded section 104 away from the shell body 111, and the welded section 104 and the second flange 122 are welded together. The first flange 112 is located between the second flange 122 and the shell body 111. That is, the first flange 112 surrounds the shell body 111, and the second flange 122 surrounds the first flange 112.

[0048] For example, the main body 121 can be a rectangular flat plate, and the second flange 122 is perpendicular to the main body 121. The second flange 122 may include a first flange 112 plate, a second flange 122 plate, a third flange plate, and a fourth flange plate. The first flange 112 plate, the second flange 122 plate, the third flange plate, and the fourth flange plate are connected in sequence, and each of the first flange 112 plate, the second flange 122 plate, the third flange plate, and the fourth flange plate corresponds to one side of the main body 121.

[0049] The first flange 112 plate at least partially overlaps with the first welding surface, and the first flange 112 plate is welded to the first welding surface. The second flange 122 plate at least partially overlaps with the second welding surface, and the second flange 122 plate is welded to the second welding surface. The third flange plate at least partially overlaps with the third welding surface, and the third flange plate is welded to the third welding surface. The fourth flange plate at least partially overlaps with the fourth welding surface, and the fourth flange plate is welded to the fourth welding surface.

[0050] The battery cell is located inside the battery casing. The battery cell is provided with a first tab and a second tab. The cover plate 12 is provided with a first terminal assembly and a second terminal assembly. The first tab and the first terminal assembly are connected, and the second tab and the second terminal assembly are connected.

[0051] The first and second tabs are respectively located at both ends of the battery cell, and the first and second terminal post assemblies are respectively located in the region of the cover plate 12 along its length near both ends. The first tab and the first terminal post assembly are welded together, and the second tab and the second terminal post assembly are welded together. For example, the first tab is the positive tab, the second tab is the negative tab, the first terminal post assembly is the positive terminal 131, and the second terminal post assembly is the negative terminal.

[0052] In one embodiment, the battery is a stacked battery, which is not only convenient to assemble but also allows for the production of batteries with longer lengths. Specifically, the cell is a stacked cell, which has first electrodes stacked on top of each other, second electrodes with opposite electrical polarity to the first electrodes, and a separator disposed between the first and second electrodes, thereby stacking multiple pairs of first and second electrodes to form a stacked cell.

[0053] Optionally, the battery cell can be a wound battery cell, which is obtained by winding a first electrode, a second electrode with the opposite electrical polarity to the first electrode, and a separator disposed between the first electrode and the second electrode.

[0054] The pole assembly 13 includes a pole 131 and an insulator 132. The pole 131 is disposed on the cover plate 12. The insulator 132 is located at least between the pole 131 and the cover plate 12 to insulate the cover plate 12 and the pole 131.

[0055] In related technologies, the insulating component 132 is located between the pole post 131 and the cover plate 12. The cover plate 12 is welded to the housing component 11, and the weld seam between the cover plate 12 and the housing component 11 overlaps with the insulating component 132. During the welding of the cover plate 12 and the housing component 11, the high temperature may damage the insulating component 132. In this application, the cover plate 12 and the housing component 11 are welded by the first flange 112 and the second flange 122. The weld seam between the cover plate 12 and the housing component 11 does not contact the insulating component 132, thus avoiding damage to the insulating component 132.

[0056] The portion of the terminal assembly 13 located inside the battery casing is connected to the tab, while the portion of the terminal 131 located outside the battery casing is used to connect to the busbar 30 and to achieve electrical connection (series or parallel connection) with other batteries through the busbar 30. To facilitate connection with the busbar 30, the terminal assembly 13 is located at the end of the cover plate 12 along the length direction of the cover plate 12, and a portion of the terminal assembly 13 protrudes from the end of the cover plate 12 along the length direction.

[0057] A recess 14 is provided on the housing 11, and the recess 14 is located on the side of the housing 11 away from the cover plate 12. The orthographic projection of the terminal assembly 13 on the housing 11 is located in the recess 14. When multiple batteries are stacked, the recess 14 is used to accommodate the terminal assembly 13 of adjacent batteries.

[0058] In this configuration, terminal post assemblies 13 can be provided at both ends of the cover plate 12. In this case, recesses 14 are provided at both ends of the housing 11. The depth of the recesses 14 is greater than the height of the terminal post assemblies 13 to prevent the terminal post assemblies 13 from contacting the housing 11 of adjacent batteries during battery assembly. The depth of the recesses 14 is the dimension of the recesses 14 in the direction perpendicular to the plate body 121, and the height of the terminal post assemblies 13 is the dimension of the portion of the terminal post assemblies 13 located on the side of the cover plate 12 away from the housing body 111 in the direction perpendicular to the plate body 121.

[0059] In this embodiment, the battery includes two first surfaces 101 (large surfaces) and multiple second surfaces 102 (small surfaces). The area of ​​the first surfaces 101 is larger than the area of ​​the second surfaces 102. The first surfaces 101 are parallel to the cover plate 12. The multiple second surfaces 102 are disposed between the two first surfaces 101. A first flange 112 is disposed on the second surface 102 of the battery. That is, in this embodiment, the terminal post 131 is disposed on the large surface of the battery, and the first flange 112 and the second flange 122 are disposed on the small surface of the battery.

[0060] The connecting segment 103 is perpendicular to the second surface 102, and the angle between the welding segment 104 and the first surface 101 is 0-180°. For example, the angle between the welding segment 104 and the first surface 101 can be 0, 30°, 45°, 90°, 135°, or 180°.

[0061] The battery provided in this embodiment includes a housing 11 and a cover plate 12. A first flange 112 extending away from the cover plate 12 is provided on the housing 11, and a second flange 122 extending towards the housing 11 is provided on the edge of the cover plate 12. The housing 11 and the cover plate 12 are welded together by the first flange 112 and the second flange 122, so that the weld between the housing 11 and the cover plate 12 is far away from the terminal assembly 13 and the battery cell. This avoids the heat generated during the welding of the housing 11 and the cover plate 12 from damaging the terminal assembly 13 or the battery cell, thereby improving the yield and safety of the battery.

[0062] Exemplary embodiments of this disclosure also provide a battery device, such as Figure 4 As shown, the battery device includes a battery assembly, which includes the battery 10 and an insulating support 20, with the insulating support 20 sleeved on the battery 10.

[0063] The battery housing 11 and cover plate 12 are provided. The housing 11 has an open receiving cavity. The cover plate 12 is provided at the opening of the housing 11 to seal the opening. The housing 11 includes a housing body 111 and a first flange 112. The first flange 112 is provided at the end of the housing body 111 near the cover plate 12 and extends away from the cover plate 12. The cover plate 12 includes a plate body 121 and a second flange 122. The second flange 122 is provided at the edge of the plate body 121 and extends towards the plate body 121 near the housing 11. The first flange 112 and the second flange 122 are welded together.

[0064] The battery device provided in this embodiment includes a battery, comprising a housing 11 and a cover plate 12. A first flange 112 extending away from the cover plate 12 is provided on the housing 11, and a second flange 122 extending towards the housing 11 is provided on the edge of the cover plate 12. The housing 11 and the cover plate 12 are welded together via the first flange 112 and the second flange 122, ensuring that the weld joint between the housing 11 and the cover plate 12 is far from the terminal assembly 13 and the battery cell. This prevents heat generated during welding of the housing 11 and the cover plate 12 from damaging the terminal assembly 13 or the battery cell, thereby improving the yield and safety of the battery device. Furthermore, an insulating bracket 20 is fitted onto the battery to insulate it from adjacent conductive devices, further enhancing the safety of the battery device.

[0065] like Figure 5 and Figure 6 As shown, the insulating bracket 20 is provided with a first receiving portion 201 and a second receiving portion 202. The second receiving portion 202 surrounds the first receiving portion 201. The shell body 111 is located in the first receiving portion 201, and the welding section 104 and the second flange 122 are at least partially located in the second receiving portion 202. That is, the insulating bracket 20 is arranged around the battery, and the insulating bracket 20 is provided with grooves for accommodating the first flange 112 and the second flange 122.

[0066] The insulating support 20 includes multiple insulating plates 21, which are connected end to end to form a first receiving portion 201. Each insulating plate 21 has a receiving groove on its side near the cover plate 12. The receiving grooves on the multiple insulating plates 21 are connected to form a second receiving portion 202. That is, a separating protrusion exists between the first receiving portion 201 and the second receiving portion 202. When the insulating support 20 is installed on the battery, the separating protrusion extends into the gap between the first flange 112 and the housing body 111 to support the first flange 112, preventing damage to the first flange 112 due to vibration or other reasons during battery use, thus improving the stability and service life of the battery device.

[0067] For example, when the battery has a cuboid or near-cuboid structure, the insulating support 20 may include four insulating plates 21, which are connected end to end to form a cuboid or near-cuboid frame, and the battery is fitted inside the frame.

[0068] The battery includes two first surfaces 101 and multiple second surfaces 102. The area of ​​the first surfaces 101 is larger than the area of ​​the second surfaces 102. An insulating support 20 surrounds the multiple second surfaces 102 of the battery, and an insulating plate 21 corresponds one-to-one with the second surfaces 102 of the battery. That is, the insulating support 20 surrounds the smaller surfaces of the battery.

[0069] A terminal assembly 13 is provided on the cover plate 12. The terminal assembly 13 is located at the end of the cover plate 12 and protrudes from the end of the cover plate 12. An avoidance notch is provided on the insulating bracket 20, and an avoidance recess 22 is provided on the insulating bracket 20. The avoidance recess 22 is used to avoid the terminal assembly 13 of the adjacent battery.

[0070] The avoidance recess 22 can be a recess 14 on the battery, that is, the groove wall of the avoidance recess 22 is attached to the recess 14 on the battery to form the avoidance recess 22. The terminal assembly 13 protrudes from the end of the cover plate 12 along the length direction, and the terminal assembly 13 protrudes from the end face of the insulating support 20 along the length direction.

[0071] The terminal assembly 13 is located at the end of the cover plate 12 along its length, and the clearance recess 22 is located on the first insulating plate 21, which is the insulating plate 21 located at the end of the battery along its length. The clearance recess 22 can be provided at one end of the insulating bracket 20, or the clearance recess 22 can be provided at both ends of the insulating bracket 20.

[0072] Furthermore, in order to achieve electrical connection of multiple batteries, such as Figure 7 As shown, the battery device may also include a busbar 30, which is located on the side of the first insulating plate 21 away from the battery, and is connected to the terminal assembly 13. For example, the busbar 30 may be welded to the terminal 131.

[0073] In this design, the terminal assembly 13 protrudes from the insulating support 20, and the busbar 30 can be a conductor plate or a conductor sheet. The busbar 30 connects to the terminal 131 of the adjacent battery. Since the terminal 131 protrudes from the end of the insulating support 20, the busbar 30 does not need to have a special bending section or other structure, which simplifies the structure of the busbar 30. Furthermore, the welding of the busbar 30 and the terminal 131 is convenient, which helps to improve the production efficiency of the battery device.

[0074] The electrode assembly 13 includes an electrode 131 and an insulator 132. The electrode 131 is disposed on the cover plate 12, and the insulator 132 is located at least between the electrode 131 and the cover plate 12 to insulate the cover plate 12 and the electrode 131. A portion of the insulator 132 overlaps with the insulating support 20. Figure 8 As shown. The insulating bracket 20 has a protrusion 23 on the side near the pole assembly 13, and the insulating member 132 has a first groove 105 on the side near the insulating bracket 20, with the protrusion 23 extending into the first groove 105.

[0075] In this embodiment, a protrusion 23 is provided on the insulating support 20, and a first groove 105 is provided on the insulating member 132. The protrusion 23 and the first groove 105 cooperate to increase the creepage distance of the battery, thereby improving the safety of the battery device. Furthermore, the cooperation between the protrusion 23 and the first groove 105 enables adjacent battery components to fit tightly together, improving the compactness of the structure in the battery device.

[0076] The protrusion 23 can surround the insulating support 20, that is, at least one ring of protrusion 23 is provided on the insulating support 20. The protrusion 23 extends into the first groove 105 on the insulating member 132 at the location corresponding to the pole assembly 13. In order to avoid interference between the protrusion 23 and the adjacent insulating support 20 when they are assembled, a second groove can be provided on the side of the insulating support 20 away from the pole assembly 13. The second groove is used to mate with the protrusion 23 on the adjacent insulating support 20. The second groove partially surrounds the insulating support 20, and no second groove is provided at the location of the insulating support 20 where the avoidance recess 22 is provided.

[0077] For example, the battery device includes multiple battery components arranged sequentially; a protrusion 23 is provided at one end of the first insulating support 20 near the second insulating support 20, and a second groove is provided at one end of the second insulating support 20 near the first insulating support 20. The protrusion 23 extends into the first groove 105. The first insulating support 20 is the insulating support 20 in the first battery component, and the second insulating support 20 is the insulating support 20 in the second battery component. The first battery component and the second battery component are two adjacent battery components among the multiple battery components.

[0078] In this embodiment, the insulating support 20 can be made of a flexible material, such as plastic or rubber. Manufacturing the insulating support 20 with a flexible material improves the fit between the insulating support 20 and the battery. However, in practical applications, the insulating support 20 can also be made of a rigid material, such as ceramic or hard plastic; this embodiment is not limited to these limitations.

[0079] The battery device provided in this embodiment can be a battery module or a battery pack, etc. When the battery device is a battery module, the battery module can include a battery assembly composed of multiple batteries and an insulating support 20. The multiple battery assemblies are arranged sequentially, and an end insulating plate 21 is provided at the end of the multiple battery assemblies along the arrangement direction.

[0080] When the battery device is a battery pack, the battery pack may also include components such as a housing, a cooling device, and a battery management system. The housing has an accommodating space, and the battery components, cooling device, and battery management system can be housed within this accommodating space. Alternatively, the battery management system can be located outside the housing, but this disclosure is not limited to this embodiment.

[0081] The battery device provided in this embodiment includes a battery, comprising a housing 11 and a cover plate 12. A first flange 112 extending away from the cover plate 12 is provided on the housing 11, and a second flange 122 extending towards the housing 11 is provided on the edge of the cover plate 12. The housing 11 and the cover plate 12 are welded together via the first flange 112 and the second flange 122, ensuring that the weld joint between the housing 11 and the cover plate 12 is far from the terminal assembly 13 and the battery cell. This prevents heat generated during welding of the housing 11 and the cover plate 12 from damaging the terminal assembly 13 or the battery cell, thereby improving the yield and safety of the battery device. Furthermore, an insulating bracket 20 is fitted onto the battery to insulate it from adjacent conductive devices, further enhancing the safety of the battery device.

[0082] The battery device provided in this disclosure can be applied to electric vehicles. When the battery is used in an electric vehicle, the battery device can be a battery pack, which is installed on the electric vehicle to provide energy to the electric vehicle.

[0083] In practical applications, the battery pack can be mounted on the frame of an electric vehicle. The battery pack can be fixedly connected to the frame. Alternatively, the battery pack can be a modular battery pack, which can be detachably connected to the vehicle body for easy replacement.

[0084] This exemplary embodiment also provides a method for manufacturing a battery, such as... Figure 9 As shown, the battery manufacturing method may include the following steps:

[0085] Step S910: Provide a first board and a second board;

[0086] Step S920: The first sheet material is stamped to form a cover plate with a second flange on the edge;

[0087] Step S930: The second sheet metal is stamped along the first direction to form a first flange at the edge of the second sheet metal, and the second sheet metal is stamped along the second direction to form a shell body, thereby forming a shell part with an accommodating cavity and a first flange, wherein the first direction and the second direction are opposite.

[0088] In step S940, the cover plate is installed on the housing component, and the first flange and the second flange are welded.

[0089] The battery manufacturing method provided in this disclosure involves stamping a first sheet metal to form a cover plate 12 with a second folded edge, and then stamping a second sheet metal twice in opposite directions to form a receiving cavity and a first folded edge. The housing 11 and the cover plate 12 are welded together via a first flange 112 and a second flange 122. This ensures that the weld joint between the housing 11 and the cover plate 12 is far from the terminal assembly 13 and the battery cell, thereby preventing heat generated during welding from damaging the terminal assembly 13 or the battery cell, thus improving the yield and safety of the battery device. Furthermore, the installation of an insulating bracket 20 on the battery achieves insulation between the battery and adjacent conductive devices, further enhancing the safety of the battery device.

[0090] Furthermore, the battery manufacturing method provided in this disclosure embodiment may further include:

[0091] Step S950: Connect the pole assembly to the cover plate. The pole assembly includes poles and an insulating element, with the insulating element disposed at least between the cover plate and the poles.

[0092] The pole assembly 13 is installed on the cover plate 12 before the cover plate 12 and the housing 11 are welded. Therefore, the connection between the cover plate 12 and the housing 11 is achieved by welding the first flange 112 and the second flange 122, which avoids welding damage to the pole assembly 13 on the cover plate 12.

[0093] The steps of the battery manufacturing method provided in this disclosure will be described in detail below:

[0094] In step S910, a first plate and a second plate are provided.

[0095] The first plate is the raw material for the cover plate 12, and it has a flat plate structure. When the battery has a cuboid structure, the first plate can be a rectangular plate. The material of the first plate can be stainless steel, aluminum alloy, or copper alloy, etc. The second plate is the raw material for the cover plate 12, and it also has a flat plate structure. When the battery has a cuboid structure, the second plate can be a rectangular plate. The material of the second plate can be stainless steel, aluminum alloy, or copper alloy, etc. The volume of the second plate is larger than that of the first plate.

[0096] In step S920, the first sheet material is stamped to form a cover plate 12 with a second flange 122 on the edge.

[0097] In this process, a first sheet metal is stamped to form a recess in the sheet metal. The bottom wall of the recess forms the main body 121, and the side wall of the recess forms a second flange. The second flange 122 is at least partially opposite to the side of the welding section 104 away from the shell main body 111, and the welding section 104 and the second flange 122 are welded together. The first flange 112 surrounds the shell main body 111, and the second flange 122 surrounds the first flange 112.

[0098] For example, the main body 121 can be a rectangular flat plate, and the second flange 122 is perpendicular to the main body 121. The second flange 122 may include a first flange 112 plate, a second flange 122 plate, a third flange plate, and a fourth flange plate. The first flange 112 plate, the second flange 122 plate, the third flange plate, and the fourth flange plate are connected in sequence, and each of the first flange 112 plate, the second flange 122 plate, the third flange plate, and the fourth flange plate corresponds to one side of the main body 121.

[0099] In step S930, the second sheet is stamped along the first direction to form a first flange 112 at the edge of the second sheet, and the second sheet is stamped along the second direction to form a shell body 111, thereby forming a shell part 11 with an accommodating cavity and the first flange 112, wherein the first direction and the second direction are opposite.

[0100] In this process, the second sheet metal is first stamped, forming a recess on the sheet metal. The sidewalls of the recess form a first flange 112, and the bottom wall of the recess forms the middle section. The middle section is then second-stamped, forming a second recess on the middle section. The second recess forms the shell body 111. The bottom wall of the second recess forms an end panel, and the sidewalls of the second recess form a frame.

[0101] The frame is located on the side of the end panel near the cover plate 12. The frame has a ring-shaped structure, and the frame and the end panel enclose the receiving cavity. The first flange 112 is connected to the end of the frame away from the short panel, and the first flange 112 extends from the end of the frame away from the end panel toward the end panel. The first flange 112 is an outward flange, that is, the first flange 112 is located on the outer side of the frame, which refers to the side of the frame away from the receiving cavity. The frame can be formed by connecting multiple frame plates end to end, and the edges of the frame plates correspond one-to-one with the edges of the end panel.

[0102] The first flange 112 includes a connecting section 103 and a welding section 104. The connecting section 103 is connected to the end of the shell body 111 near the cover plate 12, and the connecting section 103 is located on the side of the shell body 111 away from the accommodating cavity. The welding section 104 is connected to the end of the connecting section 103 away from the shell body 111, and there is a gap between the welding section 104 and the shell body 111.

[0103] The connecting segment 103 is connected to the end of the frame away from the end panel, and extends outward from the edge of the frame (away from the receiving cavity). For example, when the connecting segment 103 is planar, it can be perpendicular to the frame. Alternatively, the connecting segment 103 can be curved, allowing for a smooth transition with the frame and the welding segment 104, avoiding stress concentration. The welding segment 104 is connected to the end of the connecting segment 103 away from the frame, and is used for welding to the cover plate 12. The welding segment 104 can be parallel to the frame, and a gap exists between it and the frame. This gap prevents heat generated during welding from being transferred to the battery cell, and also accommodates the welding socket during welding, facilitating the process.

[0104] For example, the battery provided in this embodiment can be a cuboid or approximately cuboid battery. Based on this, the main body 111 is a thin-walled cuboid shell with one open side, and the first flange 112 is a rectangular or approximately rectangular annular structure. The end panel is a rectangular plate, and the frame is formed by a first frame plate, a second frame plate, a third frame plate, and a fourth frame plate connected end-to-end. The first frame plate, the second frame plate, the third frame plate, and the fourth frame plate are each disposed on one side of the end panel. Furthermore, the first frame plate, the second frame plate, the third frame plate, and the fourth frame plate are perpendicular to the end panel.

[0105] The welding segment 104 includes a first welding surface, a second welding surface, a third welding surface, and a fourth welding surface, which are sequentially connected to form a ring structure. The first welding surface is located on the side of the first frame plate away from the receiving cavity, and is parallel to the first frame plate. The second welding surface is located on the side of the second frame plate away from the receiving cavity, and is parallel to the second frame plate. The third welding surface is located on the side of the third frame plate away from the receiving cavity, and is parallel to the third frame plate. The fourth welding surface is located on the side of the fourth frame plate away from the receiving cavity, and is parallel to the fourth frame plate.

[0106] It should be noted that the execution order of steps S920 and S930 in this embodiment is interchangeable. That is, step S920 can be executed first, followed by step S930; or step S930 can be executed first, followed by step S920; or steps S920 and S930 can be executed simultaneously. This embodiment does not impose specific limitations on this. Furthermore, in step S930, the order of the two stampings on the second sheet metal can also be changed. That is, the first flange 112 can be formed by a first stamping, and then the shell body 111 can be formed by a second stamping; or the shell body 111 can be formed by a first stamping, and then the first flange 112 can be formed by a second stamping.

[0107] In step S940, the cover plate 12 is installed on the housing part 11, and the first flange 112 and the second flange 122 are welded.

[0108] When the cover plate 12 is installed on the housing component 11, the first flange 112 and the second flange 122 at least partially overlap. That is, the second flange 122 surrounds the first flange 112. Welding the first flange 112 and the second flange 122 includes placing a welding base in the gap between the housing body 111 and the first flange 112; welding the first flange 112 and the second flange 122. For example, the first flange 112 and the second flange 122 are welded by laser welding, resistance welding, or friction welding.

[0109] In step S950, the pole assembly 13 is connected to the cover plate 12. The pole assembly 13 includes a pole 131 and an insulating member 132. The insulating member 132 is at least disposed between the cover plate 12 and the pole 131.

[0110] The cover plate 12 may have a through hole through which the electrode post 131 passes. An insulating member 132 also passes through the through hole, isolating the electrode post 131 from the through hole wall. For example, the insulating member 132 may include a first insulating portion and a second insulating portion. The first insulating portion passes through the through hole in the cover plate 12, and the second insulating portion is located on the side of the cover plate 12 away from the housing body 111, thus isolating the surfaces of the electrode post 131 and the cover plate 12. The insulating member 132 and the through hole in the cover plate 12 may be an interference fit, or the insulating member 132 and the cover plate 12 may be connected by adhesive bonding.

[0111] It is understood that, before welding the cover plate 12 and the housing 11 in this embodiment, the process may include steps such as installing the battery cell onto the housing 11 and connecting the terminal post 131 and the electrode tab. This embodiment does not specifically limit the steps in this regard.

[0112] The battery manufacturing method provided in this disclosure involves stamping a first sheet metal to form a cover plate 12 with a second folded edge, and then stamping a second sheet metal twice in opposite directions to form a receiving cavity and a first folded edge. The housing 11 and the cover plate 12 are welded together via a first flange 112 and a second flange 122. This ensures that the weld joint between the housing 11 and the cover plate 12 is far from the terminal assembly 13 and the battery cell, thereby preventing heat generated during welding from damaging the terminal assembly 13 or the battery cell, thus improving the yield and safety of the battery device. Furthermore, the installation of an insulating bracket 20 on the battery achieves insulation between the battery and adjacent conductive devices, further enhancing the safety of the battery device.

[0113] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A battery, characterized in that, The battery includes: A housing component having an open receiving cavity; A cover plate is provided at the opening of the housing component to seal the opening; The housing component includes a housing body and a first flange. The first flange is connected to the end of the housing body near the cover plate and extends from the housing body away from the cover plate. The cover plate includes a plate body and a second flange. The second flange is disposed at the edge of the plate body and extends from the plate body towards the housing component. The first flange and the second flange are welded together. The first flange includes a connecting section and a welding section. The connecting section is connected to the end of the housing body near the cover plate and is located on the side of the housing body away from the receiving cavity. The welding section is connected to the end of the connecting section away from the housing body. There is a gap between the welding section and the housing body. The second flange is at least partially opposite the side of the welding section away from the housing body. The welding section is welded to the second flange. The first flange is located between the second flange and the housing body.

2. The battery as described in claim 1, characterized in that, The battery includes two first surfaces and multiple second surfaces. The area of ​​the first surface is larger than the area of ​​the second surface. The first surface is parallel to the cover plate. The multiple second surfaces are disposed between the two first surfaces. The first flange is disposed on the second surface of the battery.

3. The battery as described in claim 2, characterized in that, The connecting segment is perpendicular to the second surface, and the welding segment has an angle of 0-18 degrees with the first surface. .

4. The battery as described in claim 1, characterized in that, The battery also includes: An electrode assembly is disposed at the end of the cover plate along the length direction of the cover plate, and the electrode assembly partially protrudes from the end of the cover plate along the length direction.

5. A battery device, characterized in that, The battery device includes a battery assembly, the battery assembly comprising: The battery as described in any one of claims 1-4; An insulating bracket is fitted over the battery.

6. The battery device as claimed in claim 5, characterized in that, The insulating support is provided with a first receiving portion and a second receiving portion, the second receiving portion surrounding the first receiving portion, the shell body being located in the first receiving portion, and the welding section and at least part of the second flange being located in the second receiving portion.

7. The battery device as claimed in claim 5, characterized in that, The cover plate is provided with a pole post assembly, which is located at the end of the cover plate and protrudes from the end of the cover plate.

8. The battery device as claimed in claim 7, characterized in that, The electrode assembly includes an electrode and an insulating component. The electrode is disposed on the cover plate, and the insulating component is located at least between the electrode and the cover plate to insulate the cover plate from the electrode. The insulating component partially overlaps with the insulating support. The insulating bracket has a protrusion on the side near the pole assembly, and the insulating member has a first groove on the side near the insulating bracket, with the protrusion extending into the first groove.

9. The battery device as claimed in claim 8, characterized in that, The insulating bracket has a second groove on the side away from the protrusion, and the second groove is used to cooperate with the protrusion on the adjacent insulating bracket.

10. A method for manufacturing a battery, characterized in that, A method for manufacturing a battery as described in any one of claims 1-4, the method comprising: Provide the first and second boards; The first sheet material is stamped to form a cover plate with a second flange on the edge; The second sheet is stamped along a first direction to form a first flange at the edge of the second sheet, and the second sheet is stamped along a second direction to form a shell body, thereby forming a shell part with an accommodating cavity and a first flange, wherein the first direction and the second direction are opposite; The cover plate is installed on the housing component, and the first flange and the second flange are welded together.

11. The method for manufacturing a battery as described in claim 10, characterized in that, Welding the first flange and the second flange includes: Place the welding socket in the gap between the shell body and the first flange; Weld the first flange and the second flange.

12. The method for manufacturing a battery as described in claim 10, characterized in that, Before installing the cover plate onto the housing component, the method further includes: The electrode assembly is connected to the cover plate. The electrode assembly includes an electrode and an insulating element, with the insulating element disposed at least between the cover plate and the electrode.

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