Battery adapter, battery, and method for manufacturing battery

Abstract

The present disclosure relates to the technical field of batteries, and particularly relates to a battery adapter, a battery and a manufacturing method of the battery, the battery adapter is used for electrically connecting a battery cell and a battery shell, the battery adapter comprises: a first connecting part, a second connecting part and a buffer part, the first connecting part is used for electrically connecting the battery cell; the second connecting part is used for electrically connecting the battery shell; two ends of the buffer part are connected with the first connecting part and the second connecting part respectively; wherein, an included angle is arranged between the first connecting part and the second connecting part, so that a surface of the second connecting part used for electrically connecting the battery shell is inclined to a surface of the first connecting part used for electrically connecting the battery cell.

Description

Technical Field

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

[0002] With the development and advancement of technology, the use of electric vehicles has become increasingly widespread. Electric vehicles are equipped with battery packs, which store electrical energy and provide power to the vehicle. A battery pack typically contains multiple batteries, each consisting of a battery casing and a battery cell. The battery casing serves as the battery's electrodes, requiring electrical connection between the battery cell and the casing.

[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 adapter, a battery, and a method for manufacturing the battery, thereby achieving electrical connection between the battery cell and the battery casing.

[0005] According to one aspect of this disclosure, a battery adapter is provided for electrically connecting a battery cell and a battery casing, the battery adapter comprising:

[0006] A first connecting portion is used for electrical connection with the battery cell;

[0007] The second connecting part is used for electrical connection with the battery casing;

[0008] A buffer section, the two ends of which are respectively connected to the first connecting section and the second connecting section;

[0009] The first connecting portion and the second connecting portion have an included angle, such that the surface of the second connecting portion used for electrical connection with the battery casing is inclined to the surface of the first connecting portion used for electrical connection with the battery cell.

[0010] The battery adapter provided in this embodiment includes a first connecting part and a second connecting part. The first connecting part is used to connect a battery cell, and the second connecting part is used to connect a battery casing. The first connecting part and the second connecting part are connected by a buffer part, thereby realizing the connection between the battery cell and the battery casing. Furthermore, the surface of the second connecting part that is used to electrically connect with the battery casing is inclined to the first connecting part, which can increase the connection area between the second connecting part and the battery casing, which is beneficial to improving the current carrying capacity and the connection stability between the battery casing and the battery adapter.

[0011] According to a second aspect of this disclosure, a battery is provided, the battery including the battery adapter described above.

[0012] The battery provided by the embodiments of the present disclosure includes a battery adapter, a first connecting part of the battery adapter is used to connect a battery cell, a second connecting part of the battery adapter is used to connect a battery shell, the first connecting part and the second connecting part are connected through a buffer part, the connection between the battery cell and the battery shell is realized, and a surface of the second connecting part used to electrically connect the battery shell is inclined to a surface of the first connecting part used to electrically connect the battery cell, which can increase the connecting area of the second connecting part and the battery shell, is conducive to improving the overcurrent capacity, and can improve the connecting stability of the battery shell and the battery adapter.

[0013] According to a third aspect of the present disclosure, a manufacturing method of a battery is provided, including:

[0014] The first connecting part of the battery adapter and the battery cell are connected, and the second connecting part and the battery shell are connected, the first connecting part and the second connecting part are connected through a buffer part, and an included angle is formed between the first connecting part and the second connecting part, so that a surface of the second connecting part used to electrically connect the battery shell is inclined to a surface of the first connecting part used to electrically connect the battery cell;

[0015] The battery shell is compressed to drive the second connecting part to form a recess inwardly to compress the battery shell and the second connecting part;

[0016] The first cover plate of the battery shell is sealingly connected to the shell part.

[0017] The manufacturing method of the battery provided by the embodiments of the present disclosure connects the first connecting part and the battery cell, and connects the second connecting part and the battery shell, realizes the connection between the battery shell and the battery cell, and drives the second connecting part to form a recess inwardly by compressing the battery shell, which can improve the connecting area and the connecting stability of the battery shell and the second connecting part.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings herein are incorporated into the description and form part of the description, show embodiments consistent with the present disclosure, and together with the description serve to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 A partial sectional view of a battery provided by an exemplary embodiment of the present disclosure is shown;

[0021] Figure 2A schematic view of a battery adapter provided for exemplary embodiments of the present disclosure;

[0022] Figure 3 A schematic view of another battery adapter provided for exemplary embodiments of the present disclosure;

[0023] Figure 4 A partial cross-sectional view of another battery provided for exemplary embodiments of the present disclosure;

[0024] Figure 5 A schematic view of a battery provided for exemplary embodiments of the present disclosure;

[0025] Figure 6 A cross-sectional view of a battery provided for exemplary embodiments of the present disclosure;

[0026] Figure 7 A schematic view of a pole assembly provided for exemplary embodiments of the present disclosure;

[0027] Figure 8 A cross-sectional view of a pole assembly provided for exemplary embodiments of the present disclosure;

[0028] Figure 9 A schematic view of a first insulator provided for exemplary embodiments of the present disclosure;

[0029] Figure 10 A schematic view of a second insulator provided for exemplary embodiments of the present disclosure;

[0030] Figure 11 A schematic view of a current collector provided for exemplary embodiments of the present disclosure;

[0031] Figure 12 A schematic view of a support frame provided for exemplary embodiments of the present disclosure;

[0032] Figure 13 A schematic view of another support frame provided for exemplary embodiments of the present disclosure;

[0033] Figure 14 A flowchart of a method of manufacturing a battery provided for exemplary embodiments of the present disclosure;

[0034] Figure 15 A flowchart of another method of manufacturing a battery provided for exemplary embodiments of the present disclosure. DETAILED DESCRIPTION

[0035] The technical solutions in the example embodiments of the present disclosure will be described clearly and completely in the present disclosure with reference to the accompanying drawings. The example embodiments described herein are only for illustrative purposes, and are not intended to limit the protection scope of the present disclosure, so it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present disclosure.

[0036] In the description of the present disclosure, unless explicitly specified and limited, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more; the term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0037] Unless otherwise specified or explained, the terms "connection", "fixation" and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected, or signal connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0038] Further, in the description of the present disclosure, it should be understood that the "up", "down", "inner", "outer" and the like described in the example embodiments of the present disclosure are described with the angle shown in the drawings, and should not be understood as a limitation of the example embodiments of the present disclosure. It should also be understood that in the context, when referring to one element or feature connected to another element (one or more) "on", "below", or "inside", "outside", it can not only be directly connected to another (one or more) element "on", "below", or "inside", "outside", but also indirectly connected to another (one or more) element "on", "below", or "inside", "outside" through an intermediate element.

[0039] The example embodiments of the present disclosure first provide a battery adapter 60, as shown in Figure 1 and 2 The battery adapter 60 is used for electrically connecting the battery cell 20 and the battery shell 10, and the battery adapter 60 comprises: a first connecting portion 61, a second connecting portion 62 and a buffer portion 63, the first connecting portion 61 is used for electrically connecting with the battery cell 20; the second connecting portion 62 is used for electrically connecting with the battery shell 10; the buffer portion 63 is connected with the first connecting portion 61 and the second connecting portion 62 at both ends respectively; wherein, the first connecting portion 61 and the second connecting portion 62 have an included angle, so that the surface of the second connecting portion 62 used for electrically connecting with the battery shell 10 is inclined to the surface of the first connecting portion 61 used for electrically connecting with the battery cell 20.

[0040] The battery adapter 60 provided by the embodiments of the present disclosure includes a first connecting part 61 and a second connecting part 62. The first connecting part 61 is configured to connect the battery cell 20, and the second connecting part 62 is configured to connect the battery shell 10. The first connecting part 61 and the second connecting part 62 are connected through a buffer part 63, so that the battery cell 20 and the battery shell 10 are connected. In addition, the surface of the second connecting part 62 configured to be electrically connected with the battery shell 10 is inclined to the first connecting part 61, so that the connection area of the second connecting part 62 and the battery shell 10 can be increased, the overcurrent capacity can be improved, and the connection stability of the battery shell 10 and the battery adapter 60 can be improved. Further, the first connecting part 61 and the second connecting part 62 are independently arranged, so that the stress concentration of the battery adapter 60 during installation and transportation can be avoided, and the battery adapter 60 can be protected from being damaged by stress concentration.

[0041] The parts of the battery adapter 60 provided by the embodiments of the present disclosure will be described in detail as follows.

[0042] As shown in Figure 3 The first connecting part 61 includes a connecting body 611 and a plurality of connecting pieces 612. The plurality of connecting pieces 612 are connected to the connecting body 611, and the adjacent connecting pieces 612 among the plurality of connecting pieces 612 have a spacing. The connecting pieces 612 are configured to connect the battery cell 20.

[0043] The plurality of connecting pieces 612 can be distributed around the connecting body 611. For example, the connecting body 611 can be a circular structure, and the plurality of connecting pieces 612 can be uniformly distributed along the edge of the connecting body 611. For example, the first connecting part 61 includes four connecting pieces 612, and the four connecting pieces 612 can be uniformly distributed along the edge of the connecting body 611.

[0044] The connecting pieces 612 are configured to connect the battery cell 20. A plurality of tabs can be arranged on the battery cell 20. Each connecting piece 612 corresponds to at least one tab, and the connecting piece 612 and the corresponding tab are welded. For example, the connecting piece 612 and the tab can be welded by laser welding.

[0045] In the embodiments of the present disclosure, the tab connected with the connecting piece 612 can be a negative tab, that is, the battery shell 10 is the negative electrode of the battery. Of course, in actual application, the battery shell 10 can also be the positive electrode of the battery. In this case, the tab connected with the connecting piece 612 is a positive tab, and the embodiments of the present disclosure are not limited thereto.

[0046] The interval between two adjacent connection pieces 612 of the plurality of connection pieces 612 is provided, and the minimum distance between the two adjacent connection pieces 612 is 3 mm-15 mm. For example, the minimum distance between the two adjacent connection pieces 612 is 3 mm, 5 mm, 8 mm, 9 mm, 10 mm, or 15 mm, etc. The minimum distance between the two connection pieces 612 refers to the width of the minimum interval between the two adjacent connection pieces 612.

[0047] It should be noted that the first connecting part 61 is an integrated structure in the embodiment of the present disclosure. For example, the first connecting part 61 can be obtained by cutting a plate. A plurality of separation grooves are cut on the plate, the end of the separation groove is the connecting body 611, and the two sides of the separation groove are the connection pieces 612. Of course, in actual application, the connecting body 611 and the connection piece 612 in the first connecting part 61 can also be a split structure, and the embodiment of the present disclosure is not limited thereto.

[0048] A plurality of second connecting parts 62 can be provided in the battery adapter 60, and the plurality of second connecting parts 62 are provided at intervals. The distance between two adjacent second connecting parts 62 of the plurality of second connecting parts is 2-20 mm. For example, the plurality of second connecting parts 62 can be uniformly distributed along the circumference, and the plurality of second connecting parts have an interval, which can be a rectangular or approximately rectangular through groove. The distance between the two adjacent second connecting parts 62 can be 2 mm-20 mm, for example, the distance between the two adjacent second connecting parts 62 is 2 mm, 3 mm, 5 mm, 8 mm, 13 mm, 18 mm, or 20 mm, etc.

[0049] Through the interval between the plurality of second connecting parts 62, it can be ensured that there is a contraction space when the battery adapter 60 contracts from a large circle to a small circle, so as to avoid interference and facilitate the contraction of the battery adapter 60.

[0050] Correspondingly, the battery adapter 60 can include a plurality of buffer parts 63, each second connecting part 62 corresponds to a buffer part 63, and each interval on the first connecting part 61 corresponds to a buffer part 63. For example, the first connecting part 61 is provided with four connection pieces 612, at this time, the first connecting part 61 is provided with four intervals, and the battery adapter 60 is correspondingly provided with four buffer parts 63 and four second connecting parts 62.

[0051] In the embodiment of the present disclosure, the included angle between the first connecting part 61 and the second connecting part 62 can be greater than 0 degrees and less than 180 degrees. Preferably, the included angle between the first connecting part 61 and the second connecting part 62 is 90 degrees.

[0052] The second connecting portion 62 has a first inward recess 621, and the side of the second connecting portion 62 facing the buffer portion 63 is the inner side. The first recess 621 on the second connecting portion 62 is formed by the battery shell 10 and the second connecting portion 62 being rolled. In the initial state, the second connecting portion 62 does not have the first recess 621, and the second connecting portion 62 can be a cylindrical surface. After the battery shell 10 and the second connecting portion 62 are rolled, the first recess 621 is formed on the second connecting portion 62, and the second recess 121 is formed on the battery shell 10.

[0053] The buffer portion 63 connects the first connecting portion 61 and the second connecting portion 62, and the buffer portion 63 can be an elastic buffer portion 63. The buffer portion 63 can elastically deform, and can provide a buffer when the second connecting portion 62 and the battery shell 10 are rolled, thereby avoiding stress concentration of the battery adapter 60. In addition, the buffer portion 63 separates the first connecting portion 61 and the second connecting portion 62, thereby avoiding mutual influence of the first connecting portion 61 and the second connecting portion 62, and thereby ensuring the connection stability of each connecting portion.

[0054] The buffer portion 63 has a bent sub-portion 631 protruding from the surface of the first connecting portion 61 away from the battery cell 20, so as to form a guide space between the buffer portion 63 and the first connecting portion 61, and the guide space is used to accommodate the fixing claw 71.

[0055] For example, the buffer portion 63 can include a first bent segment and a second bent segment. The first end of the first bent segment is connected to the first connecting portion 61, the second end of the first bent segment is connected to the first end of the second bent segment, and the second end of the second bent segment is connected to the second connecting portion 62. The second end of the first bent segment is farther away from the battery cell 20 than the first end, and the second end of the first bent segment protrudes from the side of the first connecting portion 61 away from the battery cell 20. The second end of the second bent segment is closer to the battery cell 20 than the first end, and the first end of the second bent segment protrudes from the side of the first connecting portion 61 away from the battery cell 20.

[0056] For example, the width of the buffer portion 63 is 2mm-10mm, and / or the length of the buffer portion 63 is 5mm-20mm. For example, the width of the buffer portion 63 is 2mm, 3mm, 6mm, 9mm, or 10mm, and the length of the buffer portion 63 is 5mm, 6mm, 9mm, 12mm, 17mm, or 20mm, etc.

[0057] It should be noted that the first connecting portion 61, the second connecting portion 62, and the buffer portion 63 can be an integrated structure in the embodiments of the present disclosure, for example, the battery adapter 60 can be formed by cutting and bending a plate. Of course, in actual application, the first connecting portion 61, the second connecting portion 62, and the buffer portion 63 can be a split structure, and the embodiments of the present disclosure are not limited thereto.

[0058] The material of the battery adapter 60 in the embodiments of the present disclosure is a conductor material, for example, the material of the battery adapter 60 can be copper, aluminum, iron, silver, zinc, tungsten, titanium, titanium alloy or aluminum alloy, etc.

[0059] The battery adapter 60 provided by the embodiments of the present disclosure includes a first connecting part 61 and a second connecting part 62, the first connecting part 61 is used for connecting the battery cell 20, the second connecting part 62 is used for connecting the battery shell 10, the first connecting part 61 and the second connecting part 62 are connected through the buffer part 63, the connection of the battery cell 20 and the battery shell 10 is realized, and the surface of the second connecting part 62 used for electrically connecting the battery shell 10 is inclined to the first connecting part 61, which can increase the connection area of the second connecting part 62 and the battery shell 10, is conducive to improving the overcurrent capacity, and can improve the connection stability of the battery shell 10 and the battery adapter 60. Further, the first connecting part 61 and the second connecting part 62 are independently arranged, which can avoid stress concentration of the battery adapter 60 in the installation and transportation process, thereby protecting the battery adapter 60 from being damaged by stress concentration.

[0060] The exemplary embodiments of the present disclosure also provide a battery including the above-mentioned battery adapter 60. Wherein the battery adapter 60 includes: a first connecting part 61, a second connecting part 62 and a buffer part 63, the first connecting part 61 is used for electrically connecting the battery cell 20; the second connecting part 62 is used for electrically connecting the battery shell 10; both ends of the buffer part 63 are connected to the first connecting part 61 and the second connecting part 62 respectively; wherein the first connecting part 61 and the second connecting part 62 have an included angle, so that the surface of the second connecting part 62 used for electrically connecting the battery shell 10 is inclined to the surface of the first connecting part 61 used for electrically connecting the battery cell 20.

[0061] The battery provided by the embodiments of the present disclosure includes the battery adapter 60, in the battery adapter 60, the first connecting part 61 is used for connecting the battery cell 20, the second connecting part 62 is used for connecting the battery shell 10, the first connecting part 61 and the second connecting part 62 are connected through the buffer part 63, the connection of the battery cell 20 and the battery shell 10 is realized, and the surface of the second connecting part 62 used for electrically connecting the battery shell 10 is inclined to the first connecting part 61, which can increase the connection area of the second connecting part 62 and the battery shell 10, is conducive to improving the overcurrent capacity, and can improve the connection stability of the battery shell 10 and the battery adapter 60.

[0062] Further, the battery provided by the embodiment of the present disclosure can further include the battery shell 10, the battery cell 20, and the support 70; the battery cell 20 is arranged in the battery shell 10, the first connecting part 61 of the battery adapter 60 is connected with the battery cell 20, and the second connecting part 62 is connected with the battery shell 10. The support 70 is arranged on the battery adapter 60, a plurality of fixing claws 71 are arranged on the support 70, the fixing claws 71 are located on the side of the buffer part 63 facing the battery cell 20, and the fixing claws 71 are clamped with the battery adapter 60. By arranging the fixing claws 71 on the support 70 on the side of the buffer part 63 facing the battery cell 20, the deformation of the buffer part 63 can be guided, so that the deformation of the buffer part 63 towards the battery cell 20 is avoided.

[0063] Further, the battery provided by the embodiment of the present disclosure can further include the pole assembly 30, the first insulating part 51, the second insulating part 52, and the current collector plate 40. The pole assembly 30 is arranged at the end of the battery shell 10 away from the battery adapter 60, and the pole assembly 30 is electrically connected with the battery cell 20 through the current collector plate 40; the first insulating part 51 is arranged between the battery shell 10 and the pole assembly 30 to realize the insulation of the battery shell 10 and the pole assembly 30, and the first insulating part 51 includes a first insulator 511 and a second insulator 512 arranged separately, the first insulator 511 is connected with the pole assembly 30, and the second insulator 512 is connected with the first insulator 511.

[0064] The parts of the battery provided by the embodiment of the present disclosure will be described in detail as follows:

[0065] The battery shell 10 is used to form the outer contour of the battery, and the battery shell 10 can protect the structure inside the battery. The battery shell 10 has a receiving cavity, the battery cell 20 is arranged in the receiving cavity of the battery shell 10, and the pole assembly 30 is arranged on the battery shell 10, and at least part of the pole assembly 30 is located in the receiving cavity.

[0066] The battery shell 10 can include a shell part 12 and a first cover plate 11, and one end of the shell part 12 has an opening. The first cover plate 11 is connected with the shell part 12, and the first cover plate 11 is located at the opening of the shell part 12. The connection of the first cover plate 11 and the shell part 12 realizes the closure of the end of the shell part 12. The shell part 12 is provided with an inward second recess 121, and the second recess 121 cooperates with the first recess 621 of the second connecting part 62 to realize the sealed connection of the battery shell 10 and the battery adapter 60.

[0067] In an example, the battery provided by the embodiments of the present disclosure can be a cylindrical battery. On this basis, the battery shell 10 can be a hollow cylinder or a structure similar to a hollow cylinder. The battery shell 10 is a thin-walled structure, and the thickness of the thin wall of the battery shell 10 can be the same or different at different positions. The first cover plate 11 is a thin wall of one bottom surface of the hollow cylinder, and the shell member 12 can include a thin wall of the other bottom surface of the hollow cylinder and a thin wall of the side surface of the hollow cylinder.

[0068] The first cover plate 11 is in contact with the buffer portion 63, and a predetermined pre-tightening force is provided between the first cover plate 11 and the buffer portion 63 to press the battery adapter 60 by the first cover plate 11. The pressed buffer portion 63 can apply pressure to the second connecting portion 62, thereby ensuring the pressing between the second connecting portion 62 and the battery shell 10.

[0069] In a feasible embodiment, the battery shell 10 can further include a second cover plate 13 arranged on the side of the shell member 12 away from the cover plate. The second cover plate 13 and the shell member 12 can be an integrated structure, for example, the second cover plate 13 and the shell member 12 can be formed by stamping, machining or casting, etc. Alternatively, the second cover plate 13 and the shell member 12 can be a split structure, and the second cover plate 13 and the shell member 12 can be connected by welding, rolling or glue connection, etc.

[0070] The second cover plate 13 can be provided with a mounting through hole, and the pole assembly 30 is arranged through the mounting through hole. A sealing member can be arranged at the mounting through hole to seal the mounting through hole and the pole assembly 30, thereby preventing the electrolyte inside the battery from leaking out of the mounting hole.

[0071] In the embodiments of the present disclosure, the material of the battery shell 10 is a metal material, for example, the material of the battery shell 10 can be steel, aluminum, copper or silver, etc. In the battery shell 10, the materials of the first cover plate 11, the shell member 12 and the second cover plate 13 can be the same, or the materials of the first cover plate 11, the shell member 12 and the second cover plate 13 can be different. The thickness of the first cover plate 11, the second cover plate 13 and the shell member 12 can be the same, or the materials of the first cover plate 11, the second cover plate 13 and the shell member 12 can be different.

[0072] The battery cell 20 is arranged in the battery shell 10, and the battery cell 20 refers to a unit formed by winding or laminating a stacked portion including a first electrode, a separator and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. The polarity of the first electrode and the second electrode can be exchanged.

[0073] The battery cell 20 is connected to the current collector 40 and the battery adapter 60, and the current collector 40 is connected to the terminal assembly 30, thus achieving an electrical connection between the battery cell 20 and the terminal assembly 30. The battery adapter 60 is connected to the battery casing 10, thus achieving an electrical connection between the battery casing 10 and the battery cell 20. The shape of the battery cell 20 can match the shape of the battery; for example, when the battery is a cylindrical battery, the battery cell 20 can also be cylindrical or approximately cylindrical.

[0074] The battery cell 20 may include a cell body and tabs. The tabs protrude from the ends of the cell body and are used to connect to the current collector 40. For example, the cell body may have a first tab and a second tab, with the first tab located at one end and the second tab at the other end. The first tab can be a positive tab, and the second tab can be a negative tab. The first tab is located at the end of the cell body closer to the terminal assembly 30, and the second tab is located at the end of the cell body furthest from the terminal assembly 30. The first tab can be welded to the current collector 40, and the second tab can be welded to the battery adapter 60.

[0075] The main body of the battery cell may include a first electrode, a second electrode, and a separator. The first electrode tab is disposed on the first electrode, the second electrode tab is disposed on the second electrode, and the first electrode and the second electrode are separated by the separator to form the main body of the battery cell.

[0076] Specifically, the battery cell 20 provided in this embodiment can be a wound battery cell 20, which is obtained by winding a first electrode, a second electrode with the opposite electrical polarity to the first electrode, and a diaphragm sheet disposed between the first electrode and the second electrode.

[0077] Of course, in practical applications, the cell 20 can also be a stacked cell 20. This embodiment is not limited to this. The cell 20 has a first electrode sheet stacked on top of each other, a second electrode sheet with the opposite electrical properties to the first electrode sheet, and a diaphragm sheet disposed between the first electrode sheet and the second electrode sheet, so that multiple pairs of first electrode sheets and second electrode sheets are stacked to form a stacked cell 20.

[0078] like Figure 12 and Figure 13 As shown, the support member 70 is located on the side of the first connecting portion 61 away from the battery cell 20. The support member 70 may include a support member body 72 and a fixing claw 71. The fixing claw 71 is connected to the support member body 72 and extends into the guide space formed by the bending of the buffer portion 63.

[0079] The number of fixing claws 71 on the support member 70 can be the same as the number of buffer parts 63 on the battery adapter 60, with each fixing claw 71 corresponding to a guide space of a buffer part 63. For example, if the battery adapter 60 has 4 buffer parts 63, then the support member 70 can also have 4 fixing claws 71.

[0080] The support body 72 can be a cylindrical or near-cylindrical structure, with multiple fixing claws 71 distributed along the circumference. Each fixing claw 71 can include a fixing section 711 and a guide section 712. The fixing section 711 connects the support body 72 and the guide section 712, respectively, and the guide section 712 extends into the guide space of the buffer part 63.

[0081] The material of the support member 70 is an insulating material, such as plastic, rubber or ceramic.

[0082] like Figure 7 As shown, the terminal assembly 30 includes a main body 31, a flange 33, and a protrusion 32. Both the flange 33 and the protrusion 32 are connected to the end of the main body 31 near the cell 20. At least a portion of the flange 33 and at least a portion of the protrusion 32 are located inside the battery housing 10. The flange 33 is connected to the battery housing 10, and the protrusion 32 is electrically connected to the cell 20.

[0083] The flange 33 is connected to the battery housing 10, and the protrusion 32 is connected to the cell 20. This achieves independent connection between the terminal assembly 30, the battery housing 10, and the cell 20, avoiding the problem of unstable connection of the terminal assembly 30 caused by mutual influence between the battery housing 10 and the cell 20 during connection. This improves the stability of the cell 20 connection. Furthermore, at least a portion of the surface of the flange 33 connected to the battery housing 10 is perpendicular to the axial direction of the cell 20, enabling the flange 33 to also achieve electrical connection with the cell 20, thereby improving the current carrying capacity of the cell 20.

[0084] The terminal assembly 30 can be inserted into the battery housing 10, and the battery housing 10 has a mounting through hole, in which the terminal assembly 30 is installed. The main body 31 protrudes at least partially from the side of the first cover plate 11 away from the cell 20, and the flange 33 and the protrusion 32 are located in the accommodating cavity of the battery housing 10.

[0085] The terminal assembly 30 is disposed on the first cover plate 11, and the flanged portion 33 is connected to the first cover plate 11, with at least a portion of the flanged portion 33 being parallel to the first cover plate 11. When the battery includes a second insulating member 52, the flanged portion 33 is connected to the first cover plate 11 through the second insulating member 52.

[0086] A flange 33 is located at one end of the main body 31 near the battery cell 20, and is used to connect with the battery housing 10. For example, the flange 33 can be riveted to the battery housing 10. In this embodiment, the flange 33 is formed after the terminal assembly 30 is installed in the battery housing 10. That is, before assembly, the flange 33 can be a cylindrical structure coaxially arranged with the protrusion 32, and the diameter of the cylindrical structure is smaller than the diameter of the mounting through hole on the battery housing 10. After the terminal assembly 30 is installed in the mounting hole, the cylindrical structure on the terminal assembly 30 is pressed to form the flange 33 by means of stamping or the like.

[0087] A protrusion 32 is located at one end of the main body 31 near the battery cell 20, and is used for electrical connection to the battery cell 20. The protrusion 32 can be connected to the current collector 40, for example, by welding. The welding method between the protrusion 32 and the current collector 40 can be resistance welding.

[0088] like Figure 8 As shown, the protrusion 32 and the flange 33 are connected to the same end face of the main body 31, and a buffer groove 34 is provided between the flange 33 and the protrusion 32. By providing a buffer groove 34 between the flange 33 and the protrusion 32, stress concentration during the riveting process of the flange 33 is prevented from causing structural damage to the pole post assembly 30. Furthermore, the buffer groove 34 facilitates the flange 33's flanging during flanging, thereby improving production efficiency. The buffer groove also isolates the flange 33 and the protrusion 32, preventing mutual interference between them during connection, thus improving the stability of the pole post assembly 30 connection.

[0089] In one feasible embodiment, the flange 33 may be an annular or near-annular structure, and the protrusion 32 may be a columnar structure, disposed inside the annular flange 33. A gap exists between the outer wall of the protrusion 32 and the outer wall of the flange 33, forming a buffer groove 34. For example, the flange 33 and the protrusion 32 may be coaxially arranged, and the maximum diameter of the protrusion 32 may be smaller than the minimum inner diameter of the flange 33.

[0090] The flanged portion 33 may include a transition section 331 and a connecting section 332. The transition section 331 is connected to the main body portion 31. The connecting section 332 is connected to the transition section 331, and the connecting section 332 is located on the side of the transition section 331 away from the main body portion 31. The connecting section 332 is connected to the battery casing 10, and the side of the connecting section 332 facing the battery cell 20 is a plane.

[0091] The transition section 331 extends from the main body section 31 to the connecting section 332, and the diameter of the transition section 331 can gradually increase along a first direction, which is the direction along the main body section 31 to the connecting section 332 on the battery axis. The diameter of the transition section 331 increases along the first direction, forming a horn-shaped transition section. The diameter of the transition section 331 along the first direction can increase linearly or nonlinearly.

[0092] In the embodiments of the present disclosure, the material of the pole assembly 30 is a conductor material, for example, the material of the pole assembly 30 can be aluminum, aluminum alloy, copper, stainless steel, or silver, etc. The material of the pole assembly 30 can be the same as the material of the battery shell 10, or the material of the pole assembly 30 can be different from the material of the battery shell 10, which is not specifically limited in the embodiments of the present disclosure.

[0093] The first insulating part 51 is arranged between the battery shell 10 and the pole assembly 30 to achieve the insulation of the battery shell 10 and the pole assembly 30, and the first insulating part 51 includes a first insulator 511 and a second insulator 512 arranged separately, the first insulator 511 is connected with the pole assembly 30, and the second insulator 512 is connected with the first insulator 511.

[0094] As shown in Figure 9 The first insulator 511 includes a first insulating body 501 and a first insulating protrusion 502, the first insulating body 501 is sleeved on the pole assembly 30, and the first insulating protrusion 502 is arranged on the side of the first insulating body 501 away from the battery cell 20 and extends into the mounting hole.

[0095] The first insulating body 501 is arranged between the battery shell 10 and the flange part 33, and the flange part 33 is connected with the first insulating body 501. For example, the flange part 33 and the first insulating body 501 are riveted.

[0096] When the pole assembly 30 is arranged on the first cover plate 11, the first insulating body 501 is arranged between the first cover plate 11 and the flange part 33. The through hole on the first insulating body 501 and the mounting hole on the first cover plate 11 are coaxially arranged, and the first insulating protrusion 502 is arranged on the edge of the through hole of the first insulating body 501 and extends into the first mounting hole.

[0097] The first insulating protrusion 502 is arranged in the orthographic projection area of the mounting hole on the first insulating body 501, and the first insulating protrusion 502 extends into the mounting hole on the first cover plate 11. On this basis, the diameter of the mounting hole on the first cover plate 11 can be greater than the diameter of the main body section 31 of the pole assembly 30, and there is a gap between the inner wall of the mounting hole and the main body section 31, and the first insulating protrusion 502 extends into the gap.

[0098] For example, the first insulating body 501 can be a circular ring structure, and the hole diameter of the first insulating body 501 is smaller than the hole diameter of the mounting hole, and the hole diameter of the first insulating body 511 matches the diameter of the body part 31 (the hole diameter of the first insulating body 511 is slightly larger than the diameter of the body part 31). The first insulating protrusion 502 can also be a circular ring structure, the first insulating protrusion 502 is arranged on the side of the first insulating body 501 away from the battery cell 20, the hole diameter of the first insulating protrusion 502 is consistent with the hole diameter of the first insulating body 501, and the coaxial center is arranged.

[0099] It should be noted that in the embodiment of the present disclosure, the first insulating body 501 and the first insulating protrusion 502 can be an integral structure, for example, the first insulating body 511 can be formed by injection molding or machining. Of course, in actual application, the first insulating body 501 and the first insulating protrusion 502 can also be a split structure, and the embodiment of the present disclosure is not limited thereto.

[0100] The second insulating body 512 has a containing space 505, and the first insulating body 511 is arranged in the containing space 505. On this basis, the first insulating body 511 and the second insulating body 512 are overlapped, that is, the first insulating body 511 and the second insulating body 512 at least partially coincide, thereby avoiding the problem of existing gap between the first insulating body 511 and the second insulating body 512, and improving the insulation performance.

[0101] As shown in Figure 10 The second insulating body 512 includes a second insulating body 503 and a second insulating protrusion 504, the second insulating body 503 is provided with a containing hole, and the containing hole forms the containing space 505; the second insulating protrusion 504 is arranged on the side of the second insulating body 503 close to the battery cell 20, and the second insulating protrusion 504 is used to bear the first insulating body 511 in the containing hole.

[0102] The second insulating body 503 is provided with a through hole, and the second insulating protrusion 504 is arranged in the through hole. And the second insulating body 503 can cover the inner wall of the first cover plate 11, so as to realize the insulation of the current collecting disc 40 and the battery shell 10, and avoid the contact between the battery shell 10 and the current collecting disc 40 when the current collecting disc 40 or the battery shell 10 is deformed, thereby forming a short circuit.

[0103] The through hole on the second insulating body 503 and the through hole on the first insulating body 501 are coaxially arranged, the second insulating protrusion 504 is arranged at the edge of the through hole of the second insulating body 503, and the second insulating protrusion 504 is located on the side of the first insulating body 501 close to the battery cell 20.

[0104] For example, the second insulating body 503 can be a circular ring structure, and the diameter of the hole of the second insulating body 503 is greater than the diameter of the first insulating body 501. The second insulating protrusion 504 can also be a ring structure, and the second insulating protrusion 504 and the second insulating body 503 are coaxially arranged.

[0105] The second insulating protrusion 504 is used to carry the first insulating body 511, and the second insulating protrusion 504 at least partially overlaps the first insulating body 501. The part of the second insulating protrusion 504 overlapping the first insulating body 501 supports the first insulating body 501.

[0106] For example, the second insulating protrusion 504 includes an extension part 5041 and a carrying part 5042. The extension part 5041 is arranged at the position of the edge of the accommodating hole of the second insulating body 503, and the extension part 5041 extends towards the side of the second insulating body 503 close to the battery cell 20. The carrying part 5042 is arranged at the end of the extension part 5041 away from the second insulating body 503, and the extension part 5041 extends towards the direction close to the axis of the accommodating hole.

[0107] The extension part 5041 can be a circular ring structure, and the extension part 5041 is located at the side of the second insulating body 503 close to the battery cell 20. The inner diameter of the extension part 5041 is consistent with the inner diameter of the through hole on the second insulating body 503, and the extension part 5041 and the through hole are coaxially arranged. The carrying part 5042 is also a circular ring structure, and the carrying part 5042 is arranged on the inner wall of the extension part 5041. The carrying part 5042 at least partially overlaps the first insulating body 511. For example, the diameter of the first insulating body 511 is consistent with the inner diameter of the extension part 5041, and the carrying part 5042 overlaps the first insulating body 511.

[0108] The side of the carrying part 5042 close to the battery cell 20 can be in contact with the current collector plate 40. By the contact between the carrying part 5042 and the current collector plate 40, the carrying part 5042 and the current collector plate 40 can support each other, so as to avoid the deformation of the second insulating body 512 or the current collector plate 40.

[0109] It should be noted that the second insulating body 503 and the second insulating protrusion 504 can be an integrated structure in the embodiment of the present disclosure. For example, the second insulating body 512 can be formed by injection molding or machining. Of course, in actual application, the second insulating body 503 and the second insulating protrusion 504 can also be a split structure, and the embodiment of the present disclosure is not limited thereto. For example, the second insulating body 503 and the second insulating protrusion 504 can be connected by connecting glue to form the second insulating body 512.

[0110] The second insulating part 52 is arranged between the battery shell 10 and the pole assembly 30, and the second insulating part 52 is located at the side of the battery shell 10 away from the battery cell 20.

[0111] The main body 31 passes through the first cover plate 11, and a limiting part is provided at the end of the main body 31 away from the protrusion 32. The limiting part protrudes from the surface of the first cover plate 11 away from the cell 20, and the second insulating member 52 is located between the battery casing 10 and the limiting part.

[0112] The second insulating member 52 is sleeved on the main body 31 and is located on the side of the first cover plate 11 away from the battery cell 20. The limiting part protrudes from the first cover plate 11, and the second insulating member 52 is located between the limiting part and the first cover plate 11, thereby achieving insulation between the limiting part and the battery casing 10.

[0113] For example, the mounting through hole on the first cover plate 11 can be a circular hole, and the limiting protrusion 311 and the main body 31 form a stepped cylindrical structure. The diameter of the limiting protrusion 311 is larger than the diameter of the mounting through hole, and the diameter of the main body 31 is smaller than the diameter of the mounting hole. The second insulating member 52 is a ring structure, and the inner diameter of the second insulating member 52 matches the diameter of the main body 31.

[0114] In this embodiment, the insulating material can be plastic, rubber, or ceramic, etc., and the materials of the first insulating material 51 and the second insulating material 52 can be the same or different. The materials of the first insulator 511 and the second insulator 512 can be the same or different, and this embodiment does not specifically limit this.

[0115] like Figure 11 As shown, the collector plate 40 includes a collector plate body 41 and a cantilever 42. The collector plate body 41 includes a first connection area 401 and a second connection area 402. The first connection area 401 is used to connect the pole assembly 30. The second connection area 402 is provided with a cantilever hole 411 that penetrates the collector plate body 41. The cantilever 42 is connected to the collector plate body 41 and is located in the cantilever hole 411. There is a gap between the cantilever 42 and the collector plate body 41. The cantilever 42 is used to connect the battery cell 20.

[0116] The shape of the first connection area 401 can match the shape of the connection between the pole assembly 30 and the collector plate 40. For example, if a cylindrical protrusion 32 is provided on the pole assembly 30 for connecting the collector plate 40, the shape of the first connection area 401 on the collector plate body 41 can also be circular, and the area of ​​the first connection area 401 is greater than or equal to the area of ​​the connecting surface of the protrusion 32. Furthermore, the position of the protrusion 32 corresponds to the position of the first connection area 401, that is, the orthographic projection of the protrusion 32 on the collector plate 40 is located in the first connection area 401.

[0117] The pole assembly 30 and the first connecting area 401 can be connected by welding, for example, the pole assembly 30 and the first connecting area 401 can be connected by resistance welding. Of course, in actual application, the connection mode of the pole assembly 30 and the first connecting area 401 can also be other, and the embodiments of the present disclosure are not limited thereto.

[0118] The second connecting area 402 is provided with a cantilever hole 411 penetrating the current collector main body 41, and the cantilever 42 is connected in the cantilever hole 411. When a plurality of cantilever holes 411 are provided on the current collector main body 41, a cantilever 42 is provided in each cantilever hole 411. In the current collector main body 41, the plurality of cantilever holes 411 can be uniformly distributed in the circumferential direction, and on this basis, the plurality of cantilevers 42 are also uniformly distributed in the circumferential direction.

[0119] The cantilever hole 411 is located inside the second connecting area 402 to avoid the intersection of the cantilever hole 411 and the outer edge of the current collector main body 41, that is, the cantilever hole 411 and the edge of the current collector 40 have a predetermined distance interval. By locating the cantilever hole 411 inside the second connecting area 402, the integrity of the current collector 40 can be ensured, and the strength of the current collector 40 can be ensured to avoid damage to the current collector 40 during manufacturing and transportation.

[0120] In actual application, the distance between the end of the cantilever hole 411 close to the edge of the current collector main body 41 and the edge of the current collector main body 41 can be gradually changed, and it is necessary to ensure that the minimum distance between the end of the cantilever hole 411 close to the edge of the current collector main body 41 and the edge of the current collector main body 41 is greater than or equal to the predetermined distance. For example, the predetermined distance can be 1mm, 1.5mm, 2mm or 3mm, etc.

[0121] The second connecting area 402 at least partially surrounds the first connecting area 401. For example, the second connecting area 402 can surround the first connecting area 401. The first connecting area 401 is a circular area, and the second connecting area 402 can be a circular ring area, and the first connecting area 401 is embedded in the inner ring of the second connecting area 402. Of course, in actual application, the first connecting area 401 and the second connecting area 402 can also have other positional relationships, and the embodiments of the present disclosure are not limited thereto. For example, the first connecting area 401 is located on one side of the second connecting area 402, and the first connecting area 401 and the second connecting area 402 are arranged in parallel.

[0122] In an example, the current collecting plate 40 provided by the embodiments of the present disclosure is a current collecting plate 40 applied to a cylindrical battery, and the current collecting plate body 41 is in a disc shape. The first connecting area 401 is a circular area with the center of the current collecting plate body 41 as the center, and the second connecting area 402 is a circular ring concentric with the first connecting area 401. The cantilever hole 411 is a triangular or approximately triangular hole, or the cantilever hole 411 is a sector or approximately sector hole. The plurality of cantilever holes 411 are distributed along the circumference, for example, the plurality of cantilever holes 411 are uniformly distributed along the circumference. The plurality of cantilever holes 411 are provided with a spacing area 413 between adjacent cantilever holes 411 in the plurality of cantilever holes 411, and when the plurality of cantilever holes 411 are uniformly distributed, the plurality of spacing areas 413 are consistent in shape.

[0123] The current collecting plate body 41 can also be provided with a positioning notch 412, which is arranged at the edge of the current collecting plate body 41 and corresponds to the spacing area 413 between the two adjacent cantilever holes 411 in the second connecting area 402. The positioning notch 412 is used to provide positioning during welding, and the positioning notch 412 can be used as a positioning structure for material taking during installation of the current collecting plate 40.

[0124] For example, during installation of the current collecting plate 40, the current collecting plate 40 is transferred from a placement station to an installation station by a mechanical hand, the mechanical hand can clamp the positioning notch 412 of the current collecting plate 40, and the positioning notch 412 can be used as an identification feature during machine vision identification of the mechanical hand. During welding of the current collecting plate 40 and the battery cell 20 and welding of the current collecting plate 40 and the pole assembly 30, the welding robot can identify and position through the positioning notch 412.

[0125] The cantilever 42 is connected to the current collecting plate body 41 and located in the cantilever hole 411, and has a gap between the cantilever 42 and the current collecting plate body 41. The cantilever 42 is used to connect the battery cell 20. For example, the cantilever 42 and the pole lug are connected by welding.

[0126] The cantilever 42 has a fixed end and a free end, the free end is close to the first connecting area 401 and has a gap with the current collecting plate body 41, and the fixed end is connected to the current collecting plate body 41. The free end of the cantilever 42 can be connected to the pole lug, and the free end of the cantilever 42 can be deformed when subjected to an external force. Therefore, when the pole lug applies a force to the cantilever 42 due to gravity concentration or the like, the deformation of the cantilever 42 can offset the force, avoiding damage to the connection between the pole lug and the cantilever 42, and improving the connection stability of the pole lug and the cantilever 42.

[0127] When the current collector plate 40 is circular, the cantilever 42 can be approximately triangular or sector-shaped, and the width of the cantilever 42 gradually increases in the direction away from the first connection area 401, where the width of the cantilever 42 is the distance between the two edges of the cantilever 42 from the fixed end to the free end. Of course, in actual applications, the cantilever 42 can also have other structures, and the embodiments of the present disclosure are not limited thereto. For example, the cantilever 42 can also be a rectangular strip structure, etc.

[0128] Further, in order to increase the flexibility of the cantilever 42, the current collector plate 40 provided by the embodiments of the present disclosure can further include a connecting portion 43, which respectively connects the fixed end and the current collector plate body 41, and the width of the connecting portion 43 is smaller than the width of the fixed end of the cantilever 42.

[0129] By setting the width of the connecting portion 43 to be smaller than the width of the fixed end of the cantilever 42, the current collector plate 40 can have greater flexibility at the connecting portion, which is conducive to the deformation of the free end of the cantilever 42, thereby further improving the connection strength between the cantilever 42 and the tab.

[0130] In the embodiments of the present disclosure, the material of the current collector plate 40 is a conductor material, for example, the material of the current collector plate 40 can be one or more of copper, aluminum, silver, titanium, steel, aluminum alloy, and titanium alloy.

[0131] It should be noted that in the embodiments of the present disclosure, the current collector plate 40 can be a one-piece structure, and the cantilever 42 can be a structure with one end hanging in the air by cutting a slot on the current collector plate body 41. For example, a through slot approximately V-shaped or U-shaped can be cut on a disc to form the cantilever 42 in the area inside the through slot. Alternatively, the current collector plate 40 can also be a split structure, and a cantilever hole 411 can be provided on the current collector plate body 41, and the cantilever 42 can be connected to the corresponding position of the cantilever hole 411 by welding or other methods.

[0132] The battery provided by the embodiments of the present disclosure includes a battery adapter 60, the first connection portion 61 of the battery adapter 60 is used to connect the battery cell 20, the second connection portion 62 is used to connect the battery shell 10, and the first connection portion 61 and the second connection portion 62 are connected through the buffer portion 63, thereby achieving the connection between the battery cell 20 and the battery shell 10. In addition, the surface of the second connection portion 62 used for electrical connection with the battery shell 10 is inclined to the first connection portion 61, which can increase the connection area between the second connection portion 62 and the battery shell 10, thereby improving the overcurrent capacity and the connection stability between the battery shell 10 and the battery adapter 60.

[0133] The example embodiments of the present disclosure also provide a manufacturing method of a battery, as shown in Figure 10 The manufacturing method of the battery can include the following steps:

[0134] In step S101, the first connecting part of the battery adapter is connected with the battery cell, and the second connecting part is connected with the shell part of the battery shell. The first connecting part and the second connecting part are connected through the buffer part. The first connecting part and the second connecting part have an included angle, so that the surface of the second connecting part for electrically connecting with the battery shell is inclined to the surface of the first connecting part for electrically connecting with the battery cell.

[0135] In step S102, the shell part is compressed to drive the second connecting part to form a recess inwardly, so as to compress the battery shell and the second connecting part.

[0136] In step S103, the first cover plate of the battery shell is sealingly connected to the shell part.

[0137] The battery manufacturing method provided by the embodiment of the present disclosure connects the first connecting part 61 with the battery cell 20 and connects the second connecting part 62 with the battery shell 10, so as to realize the connection between the battery shell 10 and the battery cell 20. The second connecting part 62 is driven to form a recess inwardly by compressing the battery shell 10, so as to improve the connection area and the connection stability of the battery shell 10 and the second connecting part 62.

[0138] Further, as shown in Figure 11 The battery manufacturing method provided by the embodiment of the present disclosure can further include:

[0139] In step S104, before the first cover plate of the battery shell is sealingly connected to the shell part, a sealing member is arranged between the first cover plate and the shell part.

[0140] The steps of the battery manufacturing method provided by the embodiment of the present disclosure will be described in detail as follows:

[0141] The battery manufacturing method provided by the embodiment of the present disclosure can be used to manufacture the battery provided by the embodiment of the present disclosure. The structure of each component mentioned in the battery manufacturing method can refer to the structure of each component of the battery in the above embodiment.

[0142] In step S101, the first connecting part 61 of the battery adapter 60 is connected with the battery cell 20, and the second connecting part 62 is connected with the battery shell 10. The first connecting part 61 and the second connecting part 62 are connected through the buffer part 63. The first connecting part 61 and the second connecting part 62 have an included angle, so that the surface of the second connecting part 62 for electrically connecting with the battery shell 10 is inclined to the surface of the first connecting part 61 for electrically connecting with the battery cell 20.

[0143] The first connecting part 61 and the battery cell 20 can be connected by welding, and the second connecting part 62 and the battery shell 10 can be connected by welding. Of course, in actual application, the first connecting part 61 and the battery cell 20 can also be connected by clamping, bonding or the like. The second connecting part 62 and the battery shell 10 can also be connected by clamping, bonding or the like.

[0144] In a feasible embodiment, before the battery adapter 60 is installed on the battery shell 10, the pole assembly 30, the battery cell 20, the first insulating part 51, the second insulating part 52, the current collector 40 and the like are installed on the battery shell 10 to form a semi-finished battery. The battery adapter 60 is installed on the basis of the semi-finished battery.

[0145] It can be understood that in other feasible embodiments, the battery adapter 60 can also be connected to the battery shell 10 before the pole assembly 30, the battery cell 20, the first insulating part 51, the second insulating part 52, the current collector 40 and the like are installed on the battery shell 10.

[0146] In step S102, the compression shell part 12 drives the second connecting part 62 to be concave inward to form a recess to compress the battery shell 10 and the second connecting part 62.

[0147] In a feasible embodiment of the present disclosure, the battery adapter 60 can include a plurality of second connecting parts 62 and a plurality of buffer parts 63, and the plurality of second connecting parts 62 are arranged at intervals. Each second connecting part 62 corresponds to a buffer part 63, and the other end of the buffer part 63 is connected to the first connecting part.

[0148] On this basis, step S102 can be implemented by the following way: the compression shell part 12 drives the plurality of second connecting parts 62 to be gathered inward, and the interval between adjacent second connecting parts 62 in the plurality of second connecting parts 62 decreases during the compression process, and the buffer part 63 deforms. And during the compression process, the part of the battery shell 10 and the second connecting part 62 that are compressed will produce a concave inward.

[0149] The shell part 12 and the second connecting part 62 can be connected by rolling inwardly extruding the shell part 12 at the connecting part, the shell part 12 deforms under the inward extrusion force, and the shell part 12 extrudes the second connecting part 62, and the second connecting part 62 also deforms inwardly. A second recess 121 is formed on the shell part 12 by extrusion, a first recess 621 is formed on the second connecting part 62, and the first recess 621 and the second recess 121 cooperate to achieve the sealing of the battery shell 10 and the battery adapter 60.

[0150] That is, the second connecting portion 62 in the embodiment of the present disclosure has an initial state and a compressed state. In the initial state, the plurality of second connecting portions 62 form a circle with a diameter greater than that of the circle formed by the plurality of second connecting portions 62 in the compressed state.

[0151] When the shell member 12 extrudes the second connecting portion 62, the force acting on the second connecting portion 62 is partially transmitted to the buffer portion 63, and the buffer portion 63 is deformed. The buffer portion 63 can be elastic, and the deformation of the buffer portion 63 can be elastic deformation. The buffer portion 63 can apply a force in the opposite direction to the second connecting portion 62, thereby pressing the second connecting portion 62 and the shell member 12 tightly.

[0152] A fixing claw 71 is arranged between the buffer portion 63 and the first connecting portion 61. The fixing claw 71 guides the deformation direction of the buffer portion 63, so that the buffer portion 63 deforms away from the battery cell 20 when deformed, thereby avoiding contact between the buffer portion 63 and the battery cell 20.

[0153] In another possible implementation of the present disclosure, the second connecting portion 62 can be a complete annular structure, and the second connecting portion 62 is connected to the first connecting portion 61 through a plurality of buffer portions 63. On this basis, step S102 can be implemented by the following manner: compressing the shell member 12, thereby driving the second connecting portion 62 to deform. During the compression process, a recess is formed on the second connecting portion 62, and the second connecting portion 62 shrinks inwardly, and the buffer portion 63 deforms.

[0154] The intervals between the plurality of second connecting portions 62 can ensure that there is a shrinking space when the battery adapter 60 shrinks from a large circle to a small circle, thereby avoiding interference and facilitating the shrinking of the battery adapter 60.

[0155] The shell member 12 can be extruded inwardly at the connection position of the shell member 12 and the second connecting portion 62 by the way of overlock. The shell member 12 is deformed by the inward extrusion force, and the shell member 12 extrudes the second connecting portion 62, and the second connecting portion 62 also deforms inwardly (from a large-diameter annular ring to a small-diameter annular ring). A second recess 121 is formed on the shell member 12 by extrusion, a first recess 621 is formed on the second connecting portion 62, and the first recess 621 and the second recess 121 cooperate to realize the sealing of the battery shell 10 and the battery adapter 60.

[0156] That is, the second connecting portion 62 in the embodiment of the present disclosure has an initial state and a compressed state. In the initial state, the second connecting portion 62 forms a circle with a diameter greater than that of the circle formed by the second connecting portion 62 in the compressed state.

[0157] When the shell part 12 extrudes the second connecting part 62, the force acting on the second connecting part 62 is partially transmitted to the buffer part 63, the buffer part 63 is deformed, the buffer part 63 can have elasticity, the deformation of the buffer part 63 can be elastic deformation, and the buffer part 63 can apply a force in the opposite direction to the second connecting part 62, thereby pressing the second connecting part 62 and the shell part 12.

[0158] In step S103, the first cover plate 11 of the battery shell 10 is sealingly connected to the shell part 12.

[0159] In step S103, the first cover plate 11 of the battery shell 10 is sealingly connected to the shell part 12.

[0160] When the first cover plate 11 is connected to the battery shell 10, the first cover plate 11 and the buffer part 63 are in contact, and the first cover plate 11 and the buffer part 63 have a predetermined pre-tightening force, so as to press the battery adapter 60 through the first cover plate 11. The compressed buffer part 63 can apply pressure to the second connecting part 62, thereby ensuring the compression between the second connecting part 62 and the battery shell 10.

[0161] In step S104, before the first cover plate 11 of the battery shell 10 is sealingly connected to the shell part 12, a sealing member is arranged between the first cover plate 11 and the shell part 12.

[0162] The sealing member can be a gasket or a sealing ring, etc. By arranging the sealing member between the first cover plate 11 and the shell part 12, the outflow of electrolyte in the battery can be avoided, and external impurities can also be prevented from entering the inside of the battery.

[0163] In step S103, the first cover plate 11 can apply a predetermined pre-tightening force to the buffer part 63 when the first cover plate 11 is connected to the shell part 12. Therefore, step S103 can include the following: arranging the first cover plate 11 at a predetermined position of the shell part 12, so that the first cover plate 11 applies a predetermined pressure to the buffer part 62; and sealingly connecting the first cover plate 11 and the shell part 12.

[0164] The manufacturing method of the battery provided by the embodiments of the present disclosure connects the first connecting part 61 and the battery shell 10, and connects the second connecting part 62 and the battery shell 10, thereby realizing the connection between the battery shell 10 and the battery shell 10, and forming an inward recess by compressing the battery shell 10 to drive the second connecting part 62, which can improve the connection area and stability of the connection between the battery shell 10 and the second connecting part 62.

[0165] The battery provided by the embodiments of the present disclosure can be applied to an electric vehicle. When the battery is used in the electric vehicle, a plurality of batteries can be integrated into a battery pack, and the battery pack is installed on the electric vehicle to provide energy for the electric vehicle.

[0166] The battery pack can include a box body and a plurality of batteries, and the plurality of batteries are arranged in the box body. The box body is used to support and protect the batteries. A busbar can also be arranged in the battery box. The busbar can be connected with the battery pole assembly to realize series connection or parallel connection of the plurality of batteries.

[0167] In actual application, the battery pack can be installed on a frame of the electric vehicle. The battery pack can be fixedly connected with the frame. Alternatively, the battery pack can be a modular battery pack which can be detachably connected with the vehicle body for replacement.

[0168] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses or adaptive changes of the present disclosure along with their equivalents which incorporate the general principles of the present disclosure and include known or customary practices in the art. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A battery adapter, comprising: A battery adapter for electrically connecting a battery cell and a battery case, the battery adapter comprising: a first connecting portion for electrically connecting with the battery cell; a plurality of second connecting portions for electrically connecting with the battery case, the plurality of second connecting portions being spaced apart, and a distance between two adjacent second connecting portions of the plurality of second connecting portions being 2mm-20mm; a buffer portion connecting the first connecting portion and the second connecting portion at two ends thereof, the buffer portion having a bent sub-portion protruding from a side of the first connecting portion away from the battery cell to form a guide space between the buffer portion and the first connecting portion, the guide space for accommodating a fixing claw, the buffer portion comprising a first bent segment and a second bent segment, a first end of the first bent segment connecting the first connecting portion, a second end of the first bent segment connecting a first end of the second bent segment, a second end of the second bent segment connecting a second connecting portion, the second end of the first bent segment being further away from the battery cell than the first end, the second end of the first bent segment protruding from the side of the first connecting portion away from the battery cell, the first end of the second bent segment being closer to the battery cell than the second end, and the second end of the second bent segment protruding from the side of the first connecting portion away from the battery cell; wherein the first connecting portion and the second connecting portion have an included angle therebetween such that a surface of the second connecting portion for electrically connecting with the battery case is inclined to a surface of the first connecting portion for electrically connecting with the battery cell.

2. The battery adapter of claim 1, wherein, The battery adapter comprises a plurality of buffer portions, each of the buffer portions corresponding to a second connecting portion.

3. The battery adapter of claim 2, wherein, The first connecting portion comprises: a connecting body; a plurality of connecting pieces connected to the connecting body, and having a spacing between two adjacent connecting pieces, the connecting pieces for connecting the battery cell; wherein the buffer portion is connected to the connecting body and is located between the two adjacent connecting pieces.

4. The battery adapter of claim 3, wherein, A minimum distance between two adjacent connecting pieces is 3mm-15mm.

5. The battery adapter of claim 1, wherein, A width of the buffer portion is 2mm-10mm, and / or a length of the buffer portion is 5mm-20mm.

6. The battery adapter of claim 1, wherein, The included angle between the first connecting portion and the second connecting portion is 90 degrees.

7. The battery adapter of claim 1, wherein, The second connecting portion has a first recess inwardly, and a side of the second connecting portion facing the buffer portion is an inner side.

8. The battery adapter of any one of claims 1-7, wherein, The buffer portion is a spring buffer portion.

9. A battery, characterized by The battery further comprises:

10. The battery of claim 9, wherein the electrolyte is a mixture of LiPF6 and LiBF4. a battery case; a battery cell disposed in the battery case, the first connecting portion of the battery adapter connecting with the battery cell, and the second connecting portion connecting with the battery case. The battery further comprises:

11. The battery of claim 10, wherein the cathode comprises a lithium metal oxide. a support disposed in the battery adapter, the support having a plurality of fixing claws disposed thereon, the fixing claws being located on a side of the buffer portion facing the battery cell, and the fixing claws being clamped with the battery adapter. The fixing claws are disposed in the guide space formed by the buffer portion and the first connecting portion.

12. The battery of claim 10, wherein the cathode comprises a lithium metal oxide. The battery case comprises:

13. The battery of claim 9, wherein the cathode comprises a lithium metal oxide. a first cover plate; ​ A housing part is connected with the first cover plate, and the housing part is provided with a second recess inward, which is matched with the first recess of the second connecting part to realize the sealed connection of the battery housing and the battery adapter.

14. The battery of claim 13, wherein the electrolyte comprises a lithium salt. The first cover plate is in contact with the buffer part, and a preset pre-tightening force is provided between the first cover plate and the buffer part to press the battery adapter by the first cover plate.

15. The battery of any one of claims 9-14, wherein the cathode comprises a lithium metal oxide. The battery is a cylindrical battery.

16. A method of manufacturing a battery, characterized by A method for manufacturing the battery of any one of claims 9-15, comprising: connecting the first connecting part of the battery adapter and the battery cell and the second connecting part and the housing part of the battery housing, the first connecting part and the second connecting part being connected by the buffer part, and an included angle being provided between the first connecting part and the second connecting part so that the surface of the second connecting part for electrical connection with the battery housing is inclined to the surface of the first connecting part for electrical connection with the battery cell; compressing the housing part to drive the second connecting part to be recessed inward to form a recess to press the battery housing and the second connecting part; sealingly connecting the first cover plate of the battery housing to the housing part.

17. The method of manufacturing a battery according to claim 16, wherein The compression of the battery housing to drive the second connecting part to be recessed inward to form a recess, comprises: compressing the housing part to drive a plurality of the second connecting parts to be gathered inward, and the interval between adjacent second connecting parts in the plurality of the second connecting parts is reduced during the compression, and the buffer part is deformed.

18. The method of manufacturing a battery according to claim 16, wherein The compression of the battery housing to drive the second connecting part to be recessed inward to form a recess, comprises: compressing the battery housing to drive the second connecting part to be deformed, a recess is formed on the second connecting part during the compression, and the second connecting part is contracted inward, and the buffer part is deformed.

19. The method of manufacturing a battery of claim 16, wherein, The sealingly connecting the first cover plate of the battery housing to the housing part, comprises: providing the first cover plate at a preset position of the housing part to make the first cover plate apply a preset pressure to the buffer part; sealingly connecting the first cover plate and the housing part.

20. The method of manufacturing a battery of claim 16, wherein, Further comprising: providing a sealing member between the first cover plate and the housing part before sealingly connecting the first cover plate of the battery housing to the housing part.

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