Battery and method for manufacturing a battery

Abstract

The present disclosure relates to the technical field of batteries, and specifically to a battery and a manufacturing method thereof. The battery comprises a battery shell, a battery cell and an adapter. The battery shell comprises a shell part and a cover plate, and the shell part and the cover plate are connected to form a containing space. The battery cell is arranged in the containing space of the battery shell. The adapter connects the battery cell and the battery shell. A limiting part for limiting the adapter is arranged on the shell part, the adapter is clamped on the limiting part, and the shell part, the cover plate and the adapter are welded. By arranging the limiting part at a predetermined distance from the opening of the shell part, the limiting part is used to limit the adapter, so that the adapter is easy to align during the manufacturing process of the battery, and the production efficiency and the yield of the battery are improved.

Description

Technical Field

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

[0002] With technological development and advancements, 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 an adapter, with the adapter housed within the battery casing. In related technologies, positioning the adapter and battery casing during connection presents challenges.

[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 battery, thereby improving the ease of positioning the adapter to at least some extent.

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

[0006] A battery casing, the battery casing including a casing component and a cover plate, the casing component and the cover plate being connected to form an accommodating space;

[0007] The battery cell is disposed within the accommodating space of the battery casing;

[0008] An adapter that connects the battery cell and the battery casing;

[0009] The housing component is provided with a limiting part for limiting the position of the adapter component, and the housing component, the cover plate and the adapter component are welded together.

[0010] The battery provided in this embodiment of the present disclosure has a limiting part set at a preset distance between the housing and the opening. The limiting part is used to limit the adapter, which makes it easy to align the adapter during the battery manufacturing process, thereby improving the battery production efficiency and yield.

[0011] According to a second aspect of this disclosure, a method for manufacturing a battery is provided, the method comprising:

[0012] A limiting part is formed on the housing component, and an opening is provided on the housing component. The limiting part and the opening of the housing component are at a predetermined distance.

[0013] The adapter is placed into the limiting portion through the opening on the housing;

[0014] The cover plate is welded to the opening on the housing component to seal the opening.

[0015] The battery manufacturing method provided in this disclosure provides a limiting part at a preset distance between the casing and the opening, which limits the adapter, thereby making it easier to align the adapter during battery manufacturing and improving battery production efficiency and yield.

[0016] 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

[0017] 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.

[0018] Figure 1 A first partial cross-sectional view of a battery provided for an exemplary embodiment of this disclosure;

[0019] Figure 2 A second partial cross-sectional view of a battery provided as an exemplary embodiment of this disclosure;

[0020] Figure 3 A third partial cross-sectional view of a battery provided as an exemplary embodiment of this disclosure;

[0021] Figure 4 A cross-sectional view of a battery provided as an exemplary embodiment of this disclosure;

[0022] Figure 5 A fourth partial cross-sectional view of a battery provided as an exemplary embodiment of this disclosure;

[0023] Figure 6 A schematic diagram of an adapter provided for an exemplary embodiment of this disclosure;

[0024] Figure 7 A schematic diagram of a support member provided for an exemplary embodiment of this disclosure;

[0025] Figure 8 A schematic diagram of a pole post provided for an exemplary embodiment of this disclosure;

[0026] Figure 9 This is a schematic diagram of a collector disk provided as an exemplary embodiment of the present disclosure.

[0027] Figure 10A flowchart illustrating a method for manufacturing a battery, provided as an exemplary embodiment of this disclosure. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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 (one or more) "upper," "lower," "inner," or "outer," it can be directly connected to the other element (one or more) "upper," "lower," "inner," or "outer," or indirectly connected to the other element (one or more) "upper," "lower," "inner," or "outer" through an intermediate element.

[0032] This disclosure first provides an exemplary embodiment of a battery, such as Figure 1 As shown, the battery includes: a battery casing 10, a battery cell 20, and an adapter 60. The battery casing 10 includes a casing part 12 and a cover plate 11, which are connected to form an accommodating space. The battery cell 20 is disposed within the accommodating space of the battery casing 10. The adapter 60 connects the battery cell 20 and the battery casing 10. The casing part 12 is provided with a limiting part 121 for limiting the adapter 60. The casing part 12, the cover plate 11, and the adapter 60 are welded together.

[0033] The housing 12, cover plate 11, and adapter 60 are connected by a single welding process.

[0034] The battery provided in this embodiment of the present disclosure has a limiting part 121 provided at a preset distance from the opening of the housing 12. The limiting part 121 is used to limit the adapter 60, so that the adapter 60 is easy to align during the battery manufacturing process, which is beneficial to improving the production efficiency and yield of the battery.

[0035] Furthermore, such as Figure 4 As shown, the battery provided in this embodiment may further include a terminal post 30, a current collector 40, and a support member. The terminal post 30 is disposed on the housing 12, and the current collector 40 is disposed at the end of the cell 20 away from the adapter 60, connecting the terminal post 30 and the cell 20. The current collector 40 serves as a current collector for the first electrode of the battery, and the adapter 60 serves as a current collector for the second electrode of the battery. The support member is disposed on the adapter 60, and the support member is used to support the adapter 60 and guide the deformation of the adapter 60.

[0036] The following will describe in detail the various parts of the battery provided in the embodiments of this disclosure:

[0037] The battery casing 10 forms the outer contour of the battery and protects the internal structure of the battery. The battery casing 10 has a receiving space, within which the battery cell 20 is disposed. The terminals 30 are disposed in the battery casing 10, with at least a portion of the terminals 30 located within the receiving space. An electrolyte is disposed within the receiving space of the battery casing 10.

[0038] One end of the housing component 12 has an opening. The cover plate 11 is welded to the housing component 12, and the cover plate 11 is located at the opening of the housing component 12. The end of the housing component 12 is closed by the connection between the cover plate 11 and the housing component 12.

[0039] For example, the battery provided in this embodiment can be a cylindrical battery. Based on this, the battery casing 10 can be a hollow cylinder or a near-hollow cylindrical structure. The battery casing 10 has a thin-walled structure, and the thickness of the thin wall of the battery casing 10 can be the same or different at different locations. The cover plate 11 is a thin wall on one bottom surface of the hollow cylinder, and the casing component 12 can include a thin wall on the other bottom surface of the hollow cylinder and a thin wall on the side surface of the hollow cylinder, or the casing component 12 is a thin wall on the side surface of the hollow cylinder.

[0040] In the embodiments of this disclosure, the housing component 12 can be a one-piece structure. For example, the housing component 12 can be a one-piece hollow cylinder with an opening at one end, formed by casting or machining. Alternatively, the housing component 12 can be a split structure. For example, the housing component 12 can include a housing body and an end plate, with the end plate connected to the end of the housing body away from the cover plate 11.

[0041] In this embodiment, the housing 12 is made of a metallic material, such as steel, aluminum, copper, or silver. The cover 11 is also made of a metallic material, such as steel, aluminum, copper, or silver. The housing 12 and the cover 11 may be made of the same or different materials.

[0042] A limiting part 121 is provided on the housing 12 at a preset distance from the opening. The limiting part 121 is used to limit the adapter 60 during installation. The preset distance is configured such that when the adapter 60 is engaged with the limiting part 121, the end of the adapter 60 away from the cell 20 contacts the cover plate 11.

[0043] The housing component 12 may include a first housing segment 122 and a second housing segment 123. The first housing segment 122 is disposed near the cover plate 11, and the first housing segment 122 and the second housing segment 123 are connected. A limiting portion 121 is formed at the connection between the first housing segment 122 and the second housing segment 123. The second housing segment 123 has a retracted state (e.g., Figure 1 (as shown) and initial state (as shown) Figure 2 As shown), the second shell segment 123 is contracted in the initial state.

[0044] like Figure 2 As shown, when the second shell segment 123 is in the contracted state, its cross-sectional area is the same as that of the first shell segment 122. When the second shell segment 123 is in the initial state, its cross-sectional area is greater than that of the first shell segment 122. The cross-sectional area of ​​the first shell refers to the area of ​​the first shell segment 122 cut off from the cross-section parallel to the cover plate 11, and the cross-sectional area of ​​the second shell refers to the area of ​​the second shell segment 123 cut off from the cross-section parallel to the cover plate 11.

[0045] For example, when the battery is a cylindrical battery, the housing 12 is a hollow cylindrical structure. Both the first housing segment 122 and the second housing segment 123 are hollow cylindrical, and the diameter of the second housing segment 123 is larger than the diameter of the first housing segment 122. An inclined transition section may be provided between the first housing segment 122 and the second housing segment 123.

[0046] The diameter of the second housing segment 123 is larger than the diameter of the first housing segment 122, and the diameter of the second housing segment 123 is larger than the diameter of the adapter 60, which facilitates placing the adapter 60 inside the housing segment 12 and avoids the problem of metal shavings being generated due to friction between the adapter 60 and the housing segment 12 during installation.

[0047] Based on this, the adapter 60 can also have an initial state and a retracted state, with the diameter of the adapter 60 in the initial state being larger than the diameter of the adapter 60 in the retracted state. When the second housing section 123 is retracted, the adapter 60 also retracts.

[0048] In this embodiment, the diameter of the adapter 60 changes with the diameter of the second housing segment 123 during the shrinkage process. In the final battery, the diameter of the second housing segment 123 can be the same as or different from the diameter of the first housing segment 122; this embodiment does not specifically limit this. Furthermore, in the battery, the limiting portion 121 at the connection between the first housing segment 122 and the second housing segment 123 can ultimately be either concave inward or convex outward. For example, the limiting portion 121 can be made concave inward by means of edge rolling or other processing, or when shrinking the second housing segment 123, the shrinkage amount of the limiting portion 121 can be less than the shrinkage amount of the second housing segment 123, forming an outward convex shape.

[0049] The cover plate 11 may include a cover plate body 111 and a positioning part 112. The positioning part 112 is located on the side of the cover plate body 111 facing the adapter 60. The positioning part 112 is used to cooperate with the adapter 60 to realize the installation and positioning of the cover plate 11.

[0050] The cover plate body 111 can overlap the end of the housing part 12, and the positioning part 112 can be a protrusion located on the side of the cover plate body 111 facing the adapter 60. The protrusion is inserted into the adapter 60 to achieve the positioning of the cover plate 11.

[0051] For example, the cover body 111 is a circular plate, and the diameter of the cover body 111 is the same as the outer diameter of the housing part 12 (the diameter of the second housing section after shrinkage treatment). The positioning part 112 is a cylindrical protrusion, and the size of the positioning part 112 matches the size of the recess on the adapter 60.

[0052] The battery cell 20 is disposed within the battery casing 10. The battery cell 20 refers to a unit formed by winding or laminating a stacked portion, which includes 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 polarities of the first electrode and the second electrode can be interchanged.

[0053] The cell 20 is connected to the current collector 40 and the adapter 60, and the current collector 40 is connected to the terminal 30, thus realizing the electrical connection between the cell 20 and the terminal 30. The adapter 60 is connected to the battery casing 10, thus realizing the electrical connection between the battery casing 10 and the cell 20. The shape of the cell 20 can match the shape of the battery. For example, when the battery is a cylindrical battery, the cell 20 can also be cylindrical or approximately cylindrical.

[0054] 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 post 30, and the second tab is located at the end of the cell body furthest from the terminal post 30. The first tab can be welded to the current collector 40, and the second tab can be welded to the adapter 60.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The adapter 60 is used to electrically connect the battery cell 20 and the battery casing 10, and the adapter 60 is welded to the casing 12 and the cover plate 11. The casing 12, the cover plate 11 and the adapter 60 are welded together simultaneously, that is, the casing 12, the cover plate 11 and the adapter 60 are connected by a single welding.

[0059] The adapter 60 is provided with a welding area, which contacts the housing 12 and / or the cover plate 11. For example, the adapter 60 may contact both the housing 12 and the cover plate 11, or the cover plate 11 may contact both the housing 12 and the adapter 60.

[0060] In one feasible embodiment of this disclosure, such as Figure 1As shown, the end of the adapter 60 near the cover plate 11 is flush with the end of the housing 12 near the cover plate 11, so that the lower surface of the cover plate 11 is in contact with both the housing 12 and the adapter 60.

[0061] The adapter 60 includes a main body 601 and a protrusion 602. The protrusion 602 is connected to the main body 601. The main body 601 is spaced apart from the cover plate 11. The end of the protrusion 602 away from the main body 601 is flush with the end of the housing 12 near the cover plate 11.

[0062] During the battery manufacturing process, the main body is locked in place by the limiting part of the housing component. The end of the protrusion away from the main body is flush with the end face of the housing component (i.e., the opening). At this time, the preset distance between the limiting part and the opening is consistent with the height of the protrusion.

[0063] For example, the protrusion 602 can be an annular structure, and the protrusion 602 surrounds the main body 601, with its outer wall contacting the inner wall of the housing 12. The end of the protrusion 602 near the cover plate 11 is flush with the end of the housing 12 near the cover plate 11, and the edge of the cover plate 11 can contact the end face of the housing 12 near the cover plate 11. The housing 12, cover plate 11, and adapter 60 are welded together in one step using laser welding, penetration welding, or resistance welding. A welded portion 201 is formed at the point where the bottom surface of the cover plate 11 contacts the housing 12 and adapter 60. Of course, in practical applications, the protrusion 602 can also be formed by multiple spaced protrusions on the main body 601 near the cover plate 11; this embodiment is not limited to this.

[0064] In another feasible embodiment of this disclosure, such as Figure 3 As shown, a portion of the adapter 60 is clamped between the cover plate 11 and the housing 12, such that the two opposite surfaces of the adapter 60 are in contact with the housing 12 and the cover plate 11, respectively.

[0065] The adapter 60 includes a main body 601, a protrusion 602, and a flange 603. The protrusion 602 is connected to the main body 601, and the flange 603 is connected to the protrusion 602. The main body 601 is spaced apart from the cover plate 11, and the flange 603 is sandwiched between the cover plate 11 and the housing 12.

[0066] During the battery manufacturing process, the main body is secured to the limiting part of the housing component, and the flanged part overlaps the end of the housing component (that is, the opening). At this time, the preset distance between the limiting part and the opening is consistent with the height of the protrusion.

[0067] For example, a protrusion 602 surrounds a main body 601, a flange 603 surrounds the protrusion 602, and the flange 603 is located at the end of the protrusion 602 away from the main body 601. The protrusion 602 can contact the inner wall of the housing member 12, the flange 603 is higher than the end face of the housing member 12 near the cover plate 11, and the flange 603 extends outward from the protrusion 602 to the surface of the housing member 12. The cover plate 11 is provided on the side of the flange 603 away from the housing member 12, and the cover plate 11 at least partially contacts the flange 603. The welding part 201 can extend from the cover plate 11 to the housing member 12 in one go, realizing the simultaneous welding of the cover plate 11, the adapter 60, and the housing member 12.

[0068] Optional, such as Figure 6 As shown, the adapter 60 includes a first connecting portion 61, a second connecting portion 62, and a buffer portion 63. The first connecting portion 61 is used for electrical connection with the battery cell 20; the second connecting portion 62 is used for electrical connection with the battery casing 10; the two ends of the buffer portion 63 are respectively connected to the first connecting portion 61 and the second connecting portion 62; wherein, there is an included angle between the first connecting portion 61 and the second connecting portion 62, such that the surface of the second connecting portion 62 used for electrical connection with the battery casing 10 is inclined to the surface of the first connecting portion 61 used for electrical connection with the battery cell 20.

[0069] The adapter 60 may be provided with multiple second connecting parts 62 and multiple buffer parts 63. Each second connecting part 62 is connected to a corresponding buffer part 63, and each interval on the first connecting part 61 is connected to a corresponding buffer part 63. For example, if the first connecting part 61 is provided with 4 connecting pieces 612, then the first connecting part 61 is provided with 4 intervals, and the adapter 60 is provided with 4 buffer parts 63 and 4 second connecting parts 62 accordingly.

[0070] In the embodiments of this disclosure, the included angle between the first connecting portion 61 and the second connecting portion 62 can be greater than 0 degrees and less than 180 degrees. Preferably, the included angle between the first connecting portion 61 and the second connecting portion 62 is 90 degrees.

[0071] The second connecting portion 62 has an inwardly facing first recess, with the side of the second connecting portion 62 facing the buffer portion 63 being the inner side. The first recess on the second connecting portion 62 is formed by rolling the battery housing 10 and the second connecting portion 62 together. In the initial state, the second connecting portion 62 does not have the first recess, and the second connecting portion 62 can be a cylindrical surface. After the battery housing 10 and the second connecting portion 62 undergo the rolling process, the first recess is formed on the second connecting portion 62, and the second recess is formed on the battery housing 10.

[0072] The buffer portion 63 connects the first connecting portion 61 and the second connecting portion 62. The buffer portion 63 can be an elastic buffer portion 63. The buffer portion 63 can undergo elastic deformation, and can provide cushioning when the second connecting portion 62 and the battery casing 10 contract, preventing stress concentration in the adapter 60. Furthermore, the buffer portion 63 separates the first connecting portion 61 and the second connecting portion 62, thereby preventing the first connecting portion 61 and the second connecting portion 62 from affecting each other, thus ensuring the connection stability of each connecting portion.

[0073] In the embodiments of this disclosure, the first connecting part 61, the second connecting part 62, and the buffer part 63 can be an integral structure. For example, the adapter 60 can be formed by cutting and bending a sheet metal. Of course, in practical applications, the first connecting part 61, the second connecting part 62, and the buffer part 63 can be a separate structure, and the embodiments of this disclosure are not limited thereto.

[0074] When the adapter includes a first connecting portion 61, a second connecting portion 62, and a buffer portion 63, the adapter can be welded to the cover plate and housing components via the second connecting portion 62. For example, the second connecting portion 62 can form a protrusion 602, and the buffer portion 63 and the first connecting portion 61 can form a main body portion 601. When the adapter 60 also includes a flange portion 603, the flange portion 603 can be provided on the top of the second connecting portion 62, and the flange portion 603 extends outward.

[0075] In this embodiment, the adapter 60 is made of a conductive material, such as copper, aluminum, iron, silver, zinc, tungsten, titanium, titanium alloy, or aluminum alloy.

[0076] It should be noted that, in this embodiment, a sealant may also be provided between the housing 12 and the cover plate 11. The housing 12 and the cover plate 11 are connected by welding and sealant, which can improve the sealing performance of the housing 12 and the cover plate 11 and prevent electrolyte leakage in the battery.

[0077] In the embodiments disclosed herein, such as Figure 5 As shown, the electrolyte is injected into the first receiving portion after the cover plate 11 and the housing 12 are connected. To inject the electrolyte into the battery, an injection hole 101 can be provided on the cover plate 11 or the housing 12, through which the electrolyte is injected into the first receiving portion. After the electrolyte is injected into the battery, the injection hole 101 needs to be sealed. In addition, the battery may include a sealing pin 80 for sealing the injection hole 101.

[0078] For example, the injection hole 101 can be provided on the cover plate 11, and the sealing pin 80 is provided on the injection hole 101, with the sealing pin 80 partially located on the outside of the cover plate 11. A sealant 90 is also provided between the sealing pin 80 and the cover plate 11 to improve sealing performance.

[0079] For example, the sealing pin 80 may include a sealing cap 81, a sealing body 82, and a sealing core 83; the sealing cap 81 is located on the outside of the battery casing, the sealing body 82 is connected to the sealing cap 81, and at least a portion of the sealing body 82 is disposed within the injection hole 101. The sealing core 83 is disposed within the sealing body 82, and the sealing core 83 can cause the sealing body 82 to bulge along the radial direction of the sealing core 83, so that the sealing body 82 is fixedly connected to the battery casing by riveting.

[0080] A sealing cap 81 is located at the end of the sealing body 82 away from the battery cell 20, and the sealing cap 81 can cover the liquid injection hole 101 on the battery casing. For example, the diameter of the sealing cap 81 is larger than the diameter of the sealing body 82, and the diameter of the sealing cap 81 is also larger than the diameter of the liquid injection hole 101, so that the sealing cap 81 can be snapped onto the surface of the battery casing.

[0081] In this embodiment, the sealing cap 81 and the sealing body 82 can be an integral structure. For example, the sealing cap 81 and the sealing body can be integrally formed by casting or machining. Alternatively, the sealing cap 81 and the sealing body 82 can also be separate structures, and this embodiment does not specifically limit this.

[0082] At least a portion of the sealant 90 is disposed between the sealing cap 81 and the battery casing, and between the sealing body 82 and the wall of the injection hole 101. By sealing the injection hole 101 with the sealant 90, the sealing performance of the injection hole 101 can be improved, and the thickness of the sealing layer can be effectively controlled by the sealant 90 connection, avoiding the sealing layer occupying too much space on the battery.

[0083] In the embodiments disclosed herein, the elastic modulus of the sealant 90 is 0.001 GPa to 20 GPa, the compression of the sealant 90 is 5% to 40%, the adhesive pull-out strength of the sealant 90 is 0.1 MPa to 30 MPa, and the thickness of the sealant 90 is 0.1 mm to 1.5 mm.

[0084] It should be noted that, in the embodiments of this disclosure, the elastic modulus of different parts of the sealant layer may be the same or different, the compression amount of different parts of the sealant layer may be the same or different, the adhesive pull-out strength of different parts of the sealant layer may be the same or different, and the thickness of different parts of the sealant layer may be the same or different.

[0085] For example, sealant 90 includes one or more of thermoplastic polyurethane elastomer rubber, ethylene-vinyl acetate copolymer, silicone rubber, polyolefin hot melt adhesive, polyvinyl chloride hot melt adhesive, styrene-butadiene rubber, and ethylene propylene rubber.

[0086] The support member 70 and the adapter member 60 are snapped together. For example, the adapter member 60 has a connecting through hole, and the support member 70 is snapped into the connecting through hole. The connecting through hole can be located in the first connecting portion 61 of the adapter member 60.

[0087] like Figure 7 As shown, the support member 70 may include a support member body 72, a fixing claw 71, a first support protrusion, and a second support protrusion 73. The first support protrusion and the second support protrusion 73 are respectively located at both ends of the support member body 72, and the fixing claw 71 is located on the side of the support member body 72. The fixing claw 71 is used to provide support to the buffer section when the adapter retracts.

[0088] The support body 72 is located on the side of the first connecting part 61 away from the battery cell 20. The first support protrusion can be connected to the side of the support body 72 close to the battery cell 20. The first support protrusion passes through the connecting through hole on the first connecting part 61 and contacts the battery cell 20.

[0089] A cell 20 hole can be provided on the cell 20. The first support protrusion extends into the cell 20 hole through the connection through hole. The extension of the first support protrusion into the cell 20 hole can improve the connection strength between the cell 20 and the support member 70.

[0090] The hole in cell 20 can be a recessed portion on the end face of cell 20 near adapter 60. When cell 20 is a cylindrical cell 20, the hole in cell 20 can be a circular hole, and the hole in cell 20 and cell 20 are coaxially arranged.

[0091] The second support protrusion 73 is located on the end face of the support body 72 away from the battery cell body. The end of the second support protrusion 73 away from the support body 72 can contact the first cover plate 11 of the battery casing 10. The second support protrusion 73 can limit the distance between the adapter 60 and the first cover plate 11.

[0092] The support body 72 is provided with at least one fixing claw 71, which is connected to the side of the support body 72. When the support body 72 is provided with multiple fixing claws 71, the multiple fixing claws 71 can be evenly distributed on the edge of the support body 72.

[0093] Multiple electrolyte passage holes can be provided on the support member 70. These holes penetrate the support member 70 along the axial direction of the cell 20 and form electrolyte flow channels. The electrolyte flow channels on the support member 70 can improve the wetting effect of the electrolyte. For example, the electrolyte passage holes can be provided on the support member body 72.

[0094] In this embodiment of the disclosure, the support member 70 is an insulating support member 70, that is, the material of the support member 70 is an insulating material. For example, the material of the support member 70 can be plastic, rubber, or ceramic.

[0095] like Figure 8 As shown, the terminal post 30 includes a terminal post body 31, a connecting flange 33, and a transition protrusion 32. The connecting flange 33 and the transition protrusion 32 are both connected to the end of the terminal post body 31 near the cell 20. At least a portion of the connecting flange 33 and at least a portion of the transition protrusion 32 are located inside the battery casing 10. The connecting flange 33 is connected to the battery casing 10, and the transition protrusion 32 is electrically connected to the cell 20.

[0096] The connecting flange 33 is connected to the battery housing 10, and the transition protrusion 32 is connected to the battery cell 20. This achieves independent connection between the terminal post 30, the battery housing 10, and the battery cell 20, avoiding the problem of unstable connection of the terminal post 30 caused by mutual influence between the battery housing 10 and the battery cell 20 during connection. This improves the stability of the connection of the battery cell 20. Furthermore, at least a portion of the surface of the connecting flange 33 connected to the battery housing 10 is perpendicular to the axial direction of the battery cell 20, enabling the connecting flange 33 to also achieve electrical connection with the battery cell 20, thereby improving the current carrying capacity of the battery cell 20.

[0097] The terminal post 30 can be inserted into the battery housing 10. The battery housing 10 has a mounting through hole, and the terminal post 30 is installed in the mounting through hole. The terminal post body 31 protrudes at least partially from the side of the first cover plate 11 away from the cell 20, and the connecting flange 33 and the transition protrusion 32 are located in the accommodating cavity of the battery housing 10.

[0098] In this embodiment, the electrode post 30 is made of a conductive material, such as aluminum, aluminum alloy, copper, stainless steel, or silver. The material of the electrode post 30 can be the same as or different from the material of the battery casing 10; this embodiment does not specifically limit this.

[0099] The first insulating member 51 is disposed between the battery housing 10 and the terminal post 30 to achieve insulation between the battery housing 10 and the terminal post 30. The first insulating member 51 includes a first insulator 511 and a second insulator 512 that are separately disposed. The first insulator 511 is connected to the terminal post 30, and the second insulator 512 is connected to the first insulator 511.

[0100] The second insulating member 52 is disposed between the battery housing 10 and the terminal post 30, and the second insulating member 52 is located on the side of the battery housing 10 away from the cell 20.

[0101] The electrode body 31 passes through the first cover plate 11, and a limiting part 311 is provided at the end of the electrode body 31 away from the transition protrusion 32. The limiting part 311 protrudes from the surface of the first cover plate 11 away from the cell 20. The second insulating member 52 is located between the battery casing 10 and the limiting part 311.

[0102] The second insulating member 52 is sleeved on the electrode body 31 and located on the side of the first cover plate 11 away from the battery cell 20. The limiting part 311 protrudes from the first cover plate 11, and the second insulating member 52 is located between the limiting part 311 and the first cover plate 11, thereby achieving insulation between the limiting part 311 and the battery casing 10.

[0103] 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.

[0104] like Figure 9 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 post 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.

[0105] The shape of the first connection area 401 can match the shape of the connection between the pole post 30 and the collector plate 40. For example, if a cylindrical transition protrusion 32 is provided on the pole post 30 to connect the collector plate 40, then 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 transition protrusion 32. Furthermore, the position of the transition protrusion 32 corresponds to the position of the first connection area 401, that is, the orthographic projection of the transition protrusion 32 on the collector plate 40 is located in the first connection area 401.

[0106] The electrode post 30 and the first connection area 401 can be connected by welding, for example, by resistance welding. Of course, in practical applications, the connection method between the electrode post 30 and the first connection area 401 can also be other, and this disclosure does not specifically limit this.

[0107] The second connection area 402 is provided with a cantilever hole 411 penetrating the main body 41 of the collector plate, and a cantilever 42 is connected to the cantilever hole 411. When multiple cantilever holes 411 are provided on the main body 41 of the collector plate, a cantilever 42 is provided in each cantilever hole 411. In the main body 41 of the collector plate, multiple cantilever holes 411 can be evenly distributed in the circumferential direction, and on this basis, multiple cantilever 42 are also evenly distributed in the circumferential direction.

[0108] The cantilever hole 411 is located inside the second connection area 402 to prevent the cantilever hole 411 from intersecting with the outer edge of the collector plate body 41. That is, the cantilever hole 411 and the edge of the collector plate 40 have a predetermined distance between them. By placing the cantilever hole 411 inside the second connection area 402, the integrity and strength of the collector plate 40 can be guaranteed, and damage to the collector plate 40 can be avoided during manufacturing and transportation.

[0109] In practical applications, the distance between the end of the cantilever hole 411 near the edge of the collector plate body 41 and the edge of the collector plate body 41 can be gradual. It is necessary to ensure that the minimum distance between the end of the cantilever hole 411 near the edge of the collector plate body 41 and the edge of the collector plate body 41 is greater than or equal to a preset distance. For example, this preset distance can be 1 mm, 1.5 mm, 2 mm, or 3 mm, etc.

[0110] The second connecting area 402 at least partially surrounds the first connecting area 401. For example, the second connecting area 402 may surround the first connecting area 401. The first connecting area 401 is a circular region, and the second connecting area 402 may be an annular region, with the first connecting area 401 embedded in the inner ring of the second connecting area 402. Of course, in practical applications, the first connecting area 401 and the second connecting area 402 may also have other positional relationships, and the embodiments disclosed herein are not limited thereto. For example, the first connecting area 401 may be located on one side of the second connecting area 402, or the first connecting area 401 and the second connecting area 402 may be arranged parallel to each other, etc.

[0111] By setting the width of the connecting part to be smaller than the width of the fixed end of the cantilever 42, the collector plate 40 can have greater flexibility at the connecting part, which is beneficial to the deformation of the free end of the cantilever 42, thereby further improving the connection strength between the cantilever 42 and the electrode tab.

[0112] In this embodiment of the disclosure, the material of the manifold 40 is a conductor material. For example, the material of the manifold 40 can be one or more of copper, aluminum, silver, titanium, steel, aluminum alloy and titanium alloy.

[0113] It should be noted that in this embodiment, the collector plate 40 can be an integral structure, and the cantilever 42 can be a structure with one end suspended from the collector plate body 41 by a cutting groove. For example, an approximately V-shaped or U-shaped through groove can be cut into a disk, and the cantilever 42 can be formed in the area inside the through groove. Alternatively, the collector plate 40 can also be a split structure, with a through cantilever hole 411 provided on the collector plate body 41, and the cantilever 42 connected to the corresponding position of the cantilever hole 411 by welding or other means.

[0114] The battery provided in this embodiment uses a limiting part 121 at a preset distance from the opening of the housing 12 to limit the adapter 60, thereby facilitating the alignment of the adapter 60 during battery manufacturing and improving production efficiency and yield. Furthermore, the second housing segment 123 of the housing has an initial state and a retracted state. When the adapter 60 is installed, the diameter of the second housing segment 123 is larger than the size of the adapter 60, avoiding the risk of metal shavings generated due to friction between the adapter 60 and the housing 12 during installation, thus improving battery safety.

[0115] This exemplary embodiment also provides a method for manufacturing a battery, such as... Figure 10 As shown, the method for manufacturing this battery may include the following steps:

[0116] Step S101: A limiting part is formed on the housing component, and an opening is provided on the housing component. The limiting part and the opening of the housing component have a preset distance.

[0117] Step S102: Place the adapter into the limiting part through the opening on the housing part;

[0118] Step S103: Weld the cover plate to the opening on the housing component to seal the opening.

[0119] The battery manufacturing method provided in this embodiment provides a limiting part 121 at a preset distance from the opening of the housing 12, and uses the limiting part 121 to limit the adapter 60, thereby making it easier to align the adapter 60 during the battery manufacturing process, which is beneficial to improving the battery production efficiency and yield.

[0120] The steps of the battery manufacturing method provided in this disclosure will be described in detail below:

[0121] In step S101, a limiting part 121 may be formed on the housing part 12, and an opening is provided on the housing part. The limiting part 121 and the opening of the housing part 12 have a preset distance.

[0122] The limiting portion 121 on the housing member 12 can be achieved by forming a first housing segment 122 and a second housing segment 123, connecting the first housing segment 122 and the second housing segment 123, and having a cross-sectional area of ​​the second housing segment 123 larger than that of the first housing segment 122, so that the limiting portion 121 is formed at the connection between the first housing segment 122 and the second housing segment 123, and the end of the second housing segment 123 away from the first housing segment 122 has an opening.

[0123] The housing component 12 may include a first housing segment 122 and a second housing segment 123, which are connected. A limiting portion 121 is formed at the connection between the first housing segment 122 and the second housing segment 123. The second housing segment 123 has a contracted state and an initial state. In the initial state, the second housing segment 123 is contracted. The second housing segment 123 formed in step S101 may be the second housing segment 123 in the initial state. In the initial state, the diameter of the second housing segment 123 is larger than the diameter of the adapter 60, which facilitates placing the adapter 60 inside the housing component 12 and avoids the problem of metal shavings being generated due to friction between the adapter 60 and the housing component 12 during installation.

[0124] In step S102, the adapter 30 can be placed into the limiting part 121 through the opening on the housing 12.

[0125] The adapter 60 enters the housing 12 through an opening in the housing 12. The diameter of the limiting part 121 is smaller than the diameter of the adapter 60. When the adapter 60 contacts the limiting part 121, the adapter 60 is in a preset installation position. In the initial state, the diameter of the second housing segment 123 is larger than the diameter of the first housing segment 122, and the diameter of the second housing segment 123 is also larger than the diameter of the adapter 60. The inner walls of the adapter 60 and the second housing segment 123 do not contact each other, or the friction between the inner walls of the adapter 60 and the second housing segment 123 is small, to avoid friction and the generation of metal shavings.

[0126] After step S102, the battery manufacturing method provided in this embodiment may further include: shrinking the second housing segment 123 to reduce the cross-sectional area of ​​the second housing segment 123.

[0127] In this embodiment, the cross-sectional area of ​​the second shell segment 123 after shrinkage treatment is the same as that of the first shell segment 122. Of course, in practical applications, the cross-sectional area of ​​the second shell segment 123 after shrinkage treatment and the cross-sectional area of ​​the first shell segment 122 may be different, and this embodiment is not limited thereto.

[0128] The second housing segment 123 is transformed from its initial state to a contracted state through a shrinkage process. The diameter of the second housing segment 123 decreases, and it presses against the adapter 60. During the shrinkage process, the diameter of the adapter 60 changes with the diameter of the second housing segment 123. In the final battery, the diameter of the second housing segment 123 can be the same as the diameter of the first housing segment 122. Furthermore, in the battery, the limiting portion 121 at the connection between the first housing segment 122 and the second housing segment 123 can ultimately be either concave inward or convex outward. For example, the limiting portion 121 can be made concave inward through processes such as edge rolling, or when the second housing segment 123 is shrinked, the shrinkage amount of the limiting portion 121 is less than the shrinkage amount of the second housing segment 123, resulting in an outward convex shape.

[0129] In step S103, the cover plate 11 can be welded to the opening on the housing part 12 to seal the opening.

[0130] The housing 12, adapter 60, and cover 11 can be connected by a single welding process. The adapter 60 has a welding area that contacts the housing 12 and / or the cover 11. For example, the adapter 60 may contact both the housing 12 and the cover 11 simultaneously, or the cover 11 may contact both the housing 12 and the adapter 60 simultaneously.

[0131] In one feasible embodiment of this disclosure, the end of the adapter 60 near the cover plate 11 is flush with the end of the housing 12 near the cover plate 11, so that the lower surface of the cover plate 11 is in contact with both the housing 12 and the adapter 60.

[0132] The adapter 60 includes a main body 601 and a protrusion 602. The protrusion 602 is connected to the main body 601. The main body 601 is spaced apart from the cover plate 11. The end of the protrusion 602 away from the main body 601 is flush with the end of the housing 12 near the cover plate 11.

[0133] During the battery manufacturing process, the main body is locked in place by the limiting part of the housing component. The end of the protrusion away from the main body is flush with the end face of the housing component (i.e., the opening). At this time, the preset distance between the limiting part and the opening is consistent with the height of the protrusion.

[0134] For example, the protrusion 602 can be an annular structure, and the protrusion 602 surrounds the main body 601, with its outer wall contacting the inner wall of the housing 12. The end of the protrusion 602 near the cover plate 11 is flush with the end of the housing 12 near the cover plate 11, and the edge of the cover plate 11 can contact the end face of the housing 12 near the cover plate 11. The housing 12, cover plate 11, and adapter 60 are welded together in one step using laser welding, penetration welding, or resistance welding. A welded portion 201 is formed at the point where the bottom surface of the cover plate 11 contacts the housing 12 and adapter 60. Of course, in practical applications, the protrusion 602 can also be formed by multiple spaced protrusions on the main body 601 near the cover plate 11; this embodiment is not limited to this.

[0135] In another feasible embodiment of this disclosure, a portion of the adapter 60 is clamped between the cover plate 11 and the housing 12 such that two opposing surfaces of the adapter 60 are in contact with the housing 12 and the cover plate 11, respectively.

[0136] The adapter 60 includes a main body 601, a protrusion 602, and a flange 603. The protrusion 602 is connected to the main body 601, and the flange 603 is connected to the protrusion 602. The main body 601 is spaced apart from the cover plate 11, and the flange 603 is sandwiched between the cover plate 11 and the housing 12.

[0137] During the battery manufacturing process, the main body is secured to the limiting part of the housing component, and the flanged part overlaps the end of the housing component (that is, the opening). At this time, the preset distance between the limiting part and the opening is consistent with the height of the protrusion.

[0138] For example, a protrusion 602 surrounds a main body 601, a flange 603 surrounds the protrusion 602, and the flange 603 is located at the end of the protrusion 602 away from the main body 601. The protrusion 602 can contact the inner wall of the housing member 12, the flange 603 is higher than the end face of the housing member 12 near the cover plate 11, and the flange 603 extends outward from the protrusion 602 to the surface of the housing member 12. The cover plate 11 is provided on the side of the flange 603 away from the housing member 12, and the cover plate 11 at least partially contacts the flange 603. The welding part 201 can extend from the cover plate 11 to the housing member 12 in one go, realizing the simultaneous welding of the cover plate 11, the adapter 60, and the housing member 12.

[0139] The battery provided in this embodiment uses a limiting part 121 at a preset distance from the opening of the housing 12 to limit the adapter 60, thereby facilitating the alignment of the adapter 60 during battery manufacturing and improving production efficiency and yield. Furthermore, the second housing segment 123 of the housing has an initial state and a retracted state. When the adapter 60 is installed, the diameter of the second housing segment 123 is larger than the size of the adapter 60, avoiding the risk of metal shavings generated due to friction between the adapter 60 and the housing 12 during installation, thus improving battery safety.

[0140] The battery provided in this embodiment can be applied to electric vehicles. When the battery is used in an electric vehicle, multiple batteries can be integrated into a battery pack, which is then installed on the electric vehicle to provide energy to the electric vehicle.

[0141] The battery pack may include a housing and multiple batteries, with the batteries arranged inside the housing for support and protection. A busbar may also be installed within the battery housing, which can connect to the battery terminals to allow multiple batteries to be connected in series or parallel.

[0142] 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.

[0143] 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 battery casing, the battery casing including a casing component and a cover plate, the casing component and the cover plate being connected to form an accommodating space; The battery cell is disposed within the accommodating space of the battery casing; An adapter is provided to connect the battery cell and the battery casing. The adapter includes a first connecting part, a second connecting part, and a buffer part. The first connecting part is used to electrically connect with the battery cell, the second connecting part is used to electrically connect with the battery casing, and the two ends of the buffer part are respectively connected to the first connecting part and the second connecting part. A support member is provided on the adapter and is used to support the adapter. The support member includes a support member body and a fixing claw. The fixing claw is provided on the side of the support member body and is used to provide support to the buffer part when the adapter is retracted. The housing component is provided with a limiting part for limiting the position of the adapter component. The housing component, the cover plate, and the adapter component are welded together. The housing component includes: A first housing segment is disposed near the cover plate; The second housing segment is connected to the first housing segment. The limiting part is formed between the first housing segment and the second housing segment. The second housing segment has a contracted state and an initial state. In the initial state, the second housing segment is contracted. In the initial state, the cross-sectional area of ​​the second housing segment is larger than that of the first housing segment. The cross-sectional area of ​​the first housing segment refers to the area of ​​the first housing segment cut parallel to the cross-section of the cover plate. The cross-sectional area of ​​the second housing segment refers to the area of ​​the second housing segment cut parallel to the cross-section of the cover plate. In the contracted state, the cross-sectional area of ​​the second housing segment is the same as that of the first housing segment.

2. The battery as described in claim 1, characterized in that, The adapter is snapped into the limiting part.

3. The battery as described in claim 1, characterized in that, The housing, the cover plate, and the adapter are connected by a single welding process.

4. The battery as described in any one of claims 1-3, characterized in that, The cover plate includes: Cover plate body; The positioning part is located on the side of the cover plate body close to the battery cell. The positioning part cooperates with the adapter to realize the positioning of the cover plate.

5. The battery as described in claim 1, characterized in that, The housing component has an inwardly recessed portion, which forms a limiting portion.

6. A method for manufacturing a battery, characterized in that, The method for manufacturing the battery according to any one of claims 1-5 includes: A limiting portion is formed on a housing component, and an opening is provided on the housing component. The limiting portion and the opening of the housing component are at a predetermined distance, forming a first housing segment and a second housing segment. The first housing segment and the second housing segment are connected, and the cross-sectional area of ​​the second housing segment is larger than the cross-sectional area of ​​the first housing segment, so that the limiting portion is formed at the connection between the first housing segment and the second housing segment. The end of the second housing segment away from the first housing segment has an opening. The adapter is placed into the limiting portion through the opening on the housing; The second shell segment is shrunk to reduce its cross-sectional area. After the shrinkage treatment, the cross-sectional area of ​​the second shell segment is the same as that of the first shell segment. The cover plate is welded to the opening on the housing component to seal the opening.

7. The method for manufacturing a battery as described in claim 6, characterized in that, The opening for connecting the cover plate to the housing component includes: The housing, the adapter, and the cover are connected by a single welding process.

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