Cover plate assembly, battery and electric equipment

Abstract

The utility model discloses a cover plate assembly, a battery and electric equipment, relates to the technical field of batteries, and aims to solve the problems of poor welding seam quality and poor battery sealing performance caused by damage of a terminal fixing piece due to laser deviation in a battery cover welding process. The cover plate assembly comprises a cover plate and a terminal fixing piece. Wherein the terminal fixing piece comprises a first component, the surface, facing the welding part, of the first component is a first area, the surface, facing the welding part, of the terminal fixing piece is a first surface, the first area forms at least part of the first surface, and at least part of the orthographic projection of the welding part on the first surface is located in the first area; the melting point of the first part is higher than that of the welding part. In the welding process, when laser deviates and hits the terminal fixing piece, the laser is blocked by the first area where the first component is located, the first component protects the terminal fixing piece, and therefore the influence of melting of the terminal fixing piece on the welding quality is reduced, the welding seam quality is guaranteed, and then the sealing performance of the battery is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cover plate assembly, a battery and an electrical device. Background Art

[0002] A battery is a cup, tank, or other container, or portion of a composite container, that contains an electrolyte solution and electrodes to generate an electric current. It is a device that converts chemical energy into electrical energy. During battery assembly, the casing and cover, which hold the battery cells and electrolyte, must be sealed.

[0003] In the prior art, during the battery assembly process, laser welding is used to seal the shell and the cover.

[0004] However, during continuous mass production, laser beam offset can occur. This can impact the terminal retainer, located on the side of the cover facing away from the housing, securing the terminal post. This can burn the retainer, and the burned material can dissolve into the weld pool of the housing cover, compromising weld quality and the battery's seal, potentially rendering the battery useless. Utility Model Content

[0005] The embodiments of the present invention provide a cover plate assembly, a battery and an electrical device, which are used to solve the problem of poor weld quality and poor battery sealing caused by laser deviation and damage to terminal fixings during welding of the battery cover.

[0006] In order to achieve the above-mentioned purpose, the embodiments of the present invention adopt the following technical solutions:

[0007] In a first aspect, the present application provides a cover plate assembly, comprising a cover plate and a terminal retainer, wherein the cover plate comprises a main body portion and a welding portion connected to a side periphery of the main body portion. The terminal retainer is located on one side of the main body portion along a thickness direction of the main body portion, the welding portion is located on a peripheral side of the terminal retainer, the terminal retainer comprises a first component, a surface of the first component facing the welding portion is a first region, a surface of the terminal retainer facing the welding portion is the first surface, the first region forms at least a portion of the first surface, at least a portion of an orthographic projection of the welding portion on the first surface is located within the first region, and the melting point of the first component is higher than that of the welding portion.

[0008] During the welding process, when the laser deviates and hits the terminal fixture, the laser is blocked by the first area where the first component is located. Since the melting point of the first component is higher than the melting point of the welding part, the first component protects the terminal fixture and prevents the terminal fixture from melting, thereby reducing the impact of the melting of the terminal fixture on the welding quality, ensuring the quality of the weld, and thus ensuring the sealing of the battery.

[0009] In one possible embodiment, the welding portion includes a first welding portion, the first component includes a first sub-component, the surface of the terminal fixing member facing the first welding portion is the first sub-surface, the surface of the first sub-component facing the first welding portion is the first sub-region, and at least part of the positive projection of the first welding portion on the first sub-surface is located within the first sub-region.

[0010] In one possible embodiment, the welding portion includes a second welding portion, the first welding portion and the second welding portion are respectively arranged on opposite sides of the terminal fixing member, the first component includes a second sub-component, the surface of the terminal fixing member facing the second welding portion is the second sub-surface, the surface of the second sub-component facing the second welding portion is the second sub-region, and at least part of the positive projection of the second welding portion on the second sub-surface is located within the second sub-region.

[0011] In a possible embodiment, the welding portion includes a third welding portion and a fourth welding portion respectively arranged on opposite sides of the terminal fixing member, the arrangement direction of the third welding portion and the fourth welding portion is perpendicular to the arrangement direction of the first welding portion and the second welding portion, and the distance from the third welding portion and the fourth welding portion to the terminal fixing member is greater than the distance from the first welding portion and the second welding portion to the terminal fixing member.

[0012] In a possible implementation, the terminal fixing member further includes a second component, the first component is embedded in the second component, and the melting point of the first component is higher than the melting point of the second component.

[0013] In a possible implementation, the first component is a ceramic component or a metal component, and the second component is a plastic component.

[0014] In one possible embodiment, the terminal retainer includes a second surface and a third surface that are opposite to each other along the thickness direction of the terminal retainer, with the second surface facing the main body and the third surface facing away from the main body; or the second surface facing away from the main body and the third surface facing the main body. The terminal retainer also includes at least one first limiting notch, the at least one first limiting notch extending through the first surface and the second surface, with at least a portion of the first limiting notch located in the first component.

[0015] In one possible embodiment, the first component includes: a main body and at least one protrusion, at least a portion of the first limiting notch is located in the main body, at least one protrusion is located on the side of the main body facing away from the at least one first limiting notch, at least one protrusion is fixedly connected to the main body, the surface of the protrusion facing away from the main body forms at least a portion of the third surface, and the surface of the protrusion facing away from the second component forms at least a portion of the first surface.

[0016] In a possible embodiment, the main body includes a second limiting notch, the second limiting notch passes through the fourth surface, the fourth surface is the surface of the main body facing the second surface, the second component includes a first part and a second part that are connected, the first part is located on the side of the fourth surface facing away from the third surface, and the second part is accommodated in the second limiting notch.

[0017] In one possible embodiment, the terminal fixing member includes a third limiting notch, which is located at at least one end of the terminal fixing member along the length direction of the second component. The third limiting notch passes through the second surface, and the portion of the surface of the main body facing away from the first area forms at least a portion of the inner wall surface of the limiting notch.

[0018] In a possible embodiment, the second component includes a third part and a fourth part, the third part is located on the side of the main body facing away from the second surface, and the fourth part is located on the side of the first component facing away from the first area. The third part and the fourth part are fixedly connected, and the third limiting notch is located in the fourth part.

[0019] In a possible embodiment, the cover plate further includes a limiter, which is arranged on the side of the main body facing the terminal fixing member, and the limiter is arranged on at least one side of the terminal fixing member along the length direction of the second component, and the limiter is connected to the main body and to the terminal fixing member.

[0020] In a possible embodiment, the cover plate assembly further includes: a first pole, a top spacer, a lead-out piece, and a second pole, wherein the first pole is located on the side of the terminal fixing member facing away from the cover plate, the top spacer is located on the side of the main body facing away from the first pole, the lead-out piece is located on the side of the top spacer facing away from the main body, the second pole is fixedly connected to the lead-out piece, and passes through the top spacer, the cover plate, the terminal fixing member and the first pole in sequence along the thickness direction of the cover plate assembly, and the second pole is connected to the first pole.

[0021] According to the second aspect of the present application, a battery is provided, comprising a shell, a battery cell and a cover assembly, the shell comprising a accommodating cavity having an opening, the battery cell being arranged in the accommodating cavity, the cover assembly covering the opening, the welding portion being connected to the shell, the first pole being electrically connected to the battery cell, and the cover assembly being the cover assembly of any one of the above-mentioned first aspects.

[0022] According to a third aspect of the present application, there is provided an electrical device comprising an electrical device and the battery according to the second aspect, wherein the electrical device and the battery are electrically connected.

[0023] It should be noted that the technical effects brought about by any implementation method in the second aspect and the third aspect can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A schematic diagram of battery welding positions in related art;

[0025] Figure 2 A schematic diagram of a battery structure provided for this application;

[0026] Figure 3 for Figure 2 Schematic diagram of the structure of the middle cover assembly;

[0027] Figure 4 for Figure 2 Exploded diagram of the middle cover assembly;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of the middle terminal fixing piece;

[0029] Figure 6 for Figure 4 Exploded diagram of the middle terminal fixing;

[0030] Figure 7 for Figure 3 Schematic diagram of the cross section along the AA direction.

[0031] Reference numerals: 100 - battery; 110 - housing; 120 - cover assembly;

[0032] 1-cover plate; 11-body; 12-welding portion; 121-first welding portion; 122-second welding portion; 123-third welding portion; 124-fourth welding portion; 14-limiting member;

[0033] 2- first pole;

[0034] 3-terminal fixing member; 31-first component; 301-first subcomponent; 302-second subcomponent; 311-first area; 303-first subregion; 304-second subregion; 312-main body; 3121-fourth surface; 313-raised portion; 32-second component; 321-first portion; 322-second portion; 323-third portion; 324-fourth portion; 33-first surface; 331-first subsurface; 332-second subsurface; 34-second surface; 35-third surface; 36-first limiting notch; 37-second limiting notch; 38-third limiting notch;

[0035] 4-lead-out piece;

[0036] 5- second pole;

[0037] 6-top spacer;

[0038] 7- Rubber pad. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0043] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0044] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0045] A battery is a device that converts chemical energy into electrical energy. Electrolytes are a crucial component of batteries, enabling the proper functioning of batteries by allowing ions to transfer within the electrolyte. Therefore, batteries require a sealed and stable interior to house the battery cells and electrolyte. This sealed environment prevents electrolyte leakage and protects the electrolyte from external influences, ensuring proper battery operation.

[0046] A battery includes a housing, a cover assembly, a positive electrode, a negative electrode, a separator, and an electrolyte. The cover assembly and the housing cooperate to form a sealed space that accommodates the positive electrode, negative electrode, separator, and electrolyte. In some batteries, terminal fixtures are required outside the cover assembly to meet the battery's current capacity and insulation requirements.

[0047] like Figure 1 As shown, Figure 1 Schematic diagram of battery welding position in related technology.

[0048] During the battery production process, the related art uses welding to connect the shell 110 and the cover plate 1 together and form a seal; the terminal fixing member 3 is located on the side of the cover plate 1 facing away from the shell 110. However, during the assembly of the battery 100, due to the continuous operation of the laser welding equipment in mass production, there is a deviation of the laser, which may hit the terminal fixing member 3. Figure 1 The middle light H represents the laser position during normal welding, where the welding point is located between the housing 110 and the cover 1 , and the light h represents the laser position after displacement.

[0049] Since the shell 110 and the cover plate 1 are generally made of metal, and the terminal fixing part 3 is made of plastic, the melting point of the terminal fixing part 3 is lower than the melting point of the cover plate 1 and the shell 110. The laser offset hitting the terminal fixing part 3 will cause damage to the terminal fixing part 3, and the burned terminal fixing part 3 material will be integrated into the welding molten pool, thereby affecting the quality of the weld, and then affecting the sealing of the battery 100, causing the battery 100 to be scrapped.

[0050] like Figure 2 As shown, Figure 2 A schematic diagram of a battery structure provided in this application.

[0051] To address the above issues, the present invention provides a battery 100, which includes a housing 110, a battery cell, and a cover assembly 120. The housing 110 includes a receiving cavity with an opening, and the battery cell (obscured in the figure) is disposed in the receiving cavity. The cover assembly 120 covers the opening and is connected to the housing 110. The receiving cavity provides space for installing the battery cell.

[0052] like Figure 3 As shown, Figure 3 for Figure 2Schematic diagram of the structure of the middle cover plate assembly. The cover plate assembly 120 provided by the present invention includes a cover plate 1 and a terminal fixing member 3.

[0053] like Figure 4 As shown, Figure 4 for Figure 2 Exploded diagram of the middle cover assembly;

[0054] The cover plate 1 includes a main body portion 11 and a welding portion 12 connected to a side periphery of the main body portion 11 .

[0055] Here, the welding portion 12 can be understood as a skirt connected to the main body 11 or a portion of the welding portion 12 extending from the main body 11. The welding portion 12 is welded to the shell wall of the shell 110 to seal the accommodating cavity. Specifically, welding the welding portion 12 to the shell wall can reduce the impact of welding errors on the main body 11.

[0056] The shapes of the cover 1 and the housing 110 determine the shape of the battery 100 (see Figure 2 ) shape, therefore, the shape of the battery 100 can be a rectangular parallelepiped or a blade shape.

[0057] The terminal fixing member 3 is located on one side of the main body 11 along the thickness direction of the main body 11 . The terminal fixing member 3 is used to fix the pole and plays an insulating role.

[0058] The welding portion 12 is located on the peripheral side of the terminal fixing member 3, and the terminal fixing member 3 includes a first component 31. The surface of the first component 31 facing the welding portion 12 is a first area 311. The surface of the terminal fixing member 3 facing the welding portion 12 is a first surface 33. The first area 311 forms at least a part of the first surface 33. At least a part of the positive projection of the welding portion 12 on the first surface 33 is located within the first area 311. The melting point of the first component 31 is higher than the melting point of the welding portion 12.

[0059] Thus, through the above arrangement, during the welding process, when the laser deviates and hits the terminal fixing member 3, it is preferentially hit in the first area 311 where the first component 31 is located. Since the melting point of the first component 31 is higher than the melting point of the welding portion 12, the first component 31 protects the terminal fixing member 3 and prevents the terminal fixing member 3 from melting, thereby reducing the influence of the terminal fixing member 3 on the welding quality, ensuring the quality of the weld, and thus ensuring the quality of the battery 100 (see Figure 2 )Sealing.

[0060] The embodiments of the present application are described in detail below with reference to the accompanying drawings. Before describing the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first introduced.

[0061] Continue to see Figure 2During the battery 100 welding process, the laser beam is vertically directed to the gap between the welding portion 12 and the housing 110. The high temperature generated by the laser melts a portion of the welding portion 12 or other welding medium. The laser moves in the direction of the gap between the welding portion 12 and the housing 110, thereby welding the welding portion 12 to the housing 110. During the continuous operation of the welding equipment in mass production, the laser beam deviates to one side of the welding portion 12 (i.e., the direction of the main body 11 toward the terminal fixing member 3, see the main body 11 for details). Figure 4 ) in the case.

[0062] It should be noted that the welding method is not limited to the above-mentioned laser welding, and other welding methods may also be used.

[0063] Figure 5 for Figure 4 Schematic diagram of the structure of the terminal fixing. Figure 4 and Figure 5 As shown, in a possible embodiment, the welding portion 12 includes a first welding portion 121 and a second welding portion 122 , and the first welding portion 121 and the second welding portion 122 are respectively arranged on opposite sides of the terminal fixing member 3 .

[0064] The first component 31 includes a first sub-component 301 and a second sub-component 302 . In the figure, the second sub-component 302 is partially blocked by the second component 32 .

[0065] The surface of the terminal fixing member 3 facing the first welding part 121 is the first sub-surface 331 , the surface of the first sub-component 301 facing the first welding part 121 is the first sub-region 303 , and at least part of the positive projection of the first welding part 121 on the first sub-surface 331 is located in the first sub-region 303 .

[0066] Therefore, when welding is performed on the first welding portion 121 side, the first sub-region 303 protects the terminal fixing member 3 to prevent the terminal fixing member 3 from being damaged due to welding deviation.

[0067] The surface of the terminal fixing member 3 facing the second welding portion 122 is the second sub-surface 332 , the surface of the second sub-component 302 facing the second welding portion 122 is the second sub-region 304 , and at least part of the positive projection of the second welding portion 122 on the second sub-surface 332 is located in the second sub-region 304 .

[0068] Therefore, when welding is performed on the second welding portion 122 side, the second sub-region 304 protects the terminal fixing member 3 to prevent the terminal fixing member 3 from being damaged due to welding deviation.

[0069] The first sub-component 301 and the second sub-component 302 are respectively provided to protect both sides of the terminal fixing member 3 .

[0070] In a possible embodiment, the welding portion 12 includes a third welding portion 123 and a fourth welding portion 124 respectively provided on opposite sides of the terminal fixing member 3. Figure 4 As shown, the third welding portion 123 and the fourth welding portion 124 are spaced apart along the X direction in the figure, and the arrangement direction of the third welding portion 123 and the fourth welding portion 124 is perpendicular to the arrangement direction of the first welding portion 121 and the second welding portion 122. The distance between the third welding portion 123 and the fourth welding portion 124 and the terminal fixture 3 is greater than the distance between the first welding portion 121 and the second welding portion 122 and the terminal fixture 3.

[0071] Through the above-mentioned arrangement, the distance between the third welding portion 123, the fourth welding portion 124 and the terminal fixture 3 is larger, that is, larger than the focal length after the laser is dislocated. When welding is performed on the third welding portion 123 or the fourth welding portion 124 away from the terminal fixture 3, after the laser is offset, since it is larger than the laser focal length, the laser will not be focused on the terminal fixture 3, nor will the terminal fixture 3 be melted. Therefore, the first component 31 may not be provided on the side of the terminal fixture 3 facing the third welding portion 123 or the fourth welding portion 124, thereby saving the use of the first component 31 and reducing the material of the first component 31.

[0072] Continue to see Figure 4 and Figure 5 In a possible implementation, the terminal fixing member 3 further includes a second component 32 , the first component 31 is embedded in the second component 32 , and the melting point of the first component 31 is higher than the melting point of the second component 32 .

[0073] The first component 31 and the second component 32 can be connected by snapping, plugging, or gluing, or the first component 31 and the second component 32 can be integrally formed, which is not limited in the present application.

[0074] The melting point of the first component 31 is higher than that of the second component 32. When the laser hits the terminal fixing part 3, the first component 31 is irradiated by the laser first, thereby protecting the second component 32. The melting point of the first component 31 is higher than that of the second component 32, thereby protecting the second component 32.

[0075] In a possible implementation, the first component 31 is a ceramic component or a metal component, and the second component 32 is a plastic component.

[0076] The second component 32 is a plastic component. When the cover assembly 120 is installed, the plastic component has an appropriate elastic modulus, which can reduce the risk of cracking of the second component 32 .

[0077] Exemplarily, the first component 31 is a ceramic component. The melting point of ceramic is much higher than the melting point of the shell 110 and the cover assembly when they are welded, which can reduce the damage degree of the terminal fixing member 3 caused by laser offset irradiation.

[0078] For example, the first component 31 is a metal component, and the melting point of the metal component is higher than the welding melting point of the shell 110 and the cover assembly.

[0079] In a possible embodiment, the terminal fixture 3 is entirely the second component 32 , and the terminal fixture 3 is a ceramic component or a metal component. Thus, the terminal fixture 3 can protect the terminal fixture 3 and reduce the possibility of the terminal fixture 3 being damaged by laser irradiation.

[0080] like Figure 6 As shown, Figure 6 for Figure 4 Exploded view of the middle terminal fixture.

[0081] Combine Figure 4 、 Figure 5 and Figure 6 Before further introducing the embodiments of the present application, it should be noted that the first component 31 and the second component 32 are connected by an injection molding process. Specifically, during injection molding, the first component 31 is placed in a mold, and then polyphenylene sulfide (PPS) plastic material is injected into the mold to form the mold.

[0082] The first component 31 includes a main body portion 312 extending along the X direction.

[0083] The terminal fixing member 3 also includes at least one first limiting notch 36, which passes through the first sub-surface 331 and the second surface 34 (the second surface 34 in the figure is the lower surface of the terminal fixing member 3), and at least part of the first limiting notch 36 is located in the main body 312.

[0084] In one possible embodiment, the terminal retainer 3 includes a second surface 34 and a third surface 35 that face each other, with the second surface 34 facing the body 11 and the third surface 35 facing away from the body 11. At least a portion of the first limiting notch 36 is located between the body 11 and the main body 312 of the first terminal retainer 3. During the injection molding process, the mold at the first limiting notch 36 has a protrusion.

[0085] In one possible embodiment, the terminal retainer 3 includes a second surface 34 and a third surface 35 that are opposite to each other, with the second surface 34 facing away from the main body 11 and the third surface 35 facing the main body 11. A first limiting notch 36 is located on a side of the main body 312 of the first terminal retainer 3 that is away from the main body 11. During the injection molding process, the mold at the first limiting notch 36 has a protrusion.

[0086] In this way, the protrusions on the mold can limit the first component 31 in the mold along the first direction X and the third direction Z, thereby limiting the first component 31. The third direction Z is the arrangement direction of the terminal fixing member 3 and the cover plate 1, and the direction Z is perpendicular to the direction X and the direction Y.

[0087] At the same time, when the terminal fixing member 3 is demoulded, the first limiting notch 36 facilitates demoulding.

[0088] For example, the number of the first limiting notches 36 can be multiple, and the multiple first limiting notches 36 are arranged along the extension direction of the first component 31 , for example, the multiple first limiting notches 36 are arranged along the direction X in the figure.

[0089] The first component 31 includes a first sub-component 301 and a second sub-component 302. A plurality of first limiting notches 36 can be respectively provided on the first sub-component 301 and the second sub-component 302. The number of the first limiting notches 36 on the first sub-component 301 and the second sub-component 302 can be set according to actual usage and different purposes.

[0090] Exemplarily, the multiple first limiting notches 36 on the first sub-component 301 are arranged along the extension direction of the first sub-component 301, and the multiple first limiting notches 36 on the second sub-component 302 are arranged along the extension direction of the second sub-component 302. The multiple first limiting notches 36 on the first sub-component 301 and the multiple first limiting notches 36 on the second sub-component 302 are arranged along the arrangement direction of the first sub-component 301 and the second sub-component 302 (direction Y in the figure).

[0091] The evenly arranged first limiting notches 36 are more aesthetically pleasing, and the plurality of first limiting notches 36 can more stably fix the position of the first component 31 in the mold.

[0092] In one possible embodiment, the first component 31 includes at least one protrusion 313, the at least one protrusion 313 is located on the side of the main body 312 facing away from the at least one first limiting notch 36, the at least one protrusion 313 is fixedly connected to the main body 312, and the protrusion 313 passes through the first surface 33 and the third surface 35.

[0093] The protrusion 313 contacts the mold of the top wall, thereby limiting the first component 31 from moving toward the protrusion 313 .

[0094] The raised portion 313 creates a certain distance between the main portion 312 and the top of the mold, allowing plastic to be injected into the gap between the main portion 312 and the top of the mold to form the second component 32. When forming the terminal retainer 3, the second components 32 are provided on both sides of the first component 31 in the third direction Z. Thus, the second components 32 limit the first component 31 in the third direction Z, preventing the first component 31 from slipping out of the second component 32 in the third direction Z.

[0095] At the same time, the protrusion 313 is provided so that the second component 32 can be injected into both ends of the protrusion 313 along the second direction Y, so that in the second direction Y, the second component 32 forms a limit for the first component 31, thereby preventing the first component 31 from escaping from the second component 32 in the second direction Y.

[0096] For example, the first component 31 is provided with a plurality of protrusions 313 located on a side of the main body 312 facing away from the plurality of first limiting notches 36. The protrusions 313 cooperate with the first limiting notches 36 to fix the position of the first component 31 in the third direction Z. Thus, during the injection molding process, the position of the first component 31 is fixed, and the terminal fixing member 3 is formed to be standard.

[0097] Exemplarily, the fixed connection between the protrusion 313 and the main body 312 can be one of bolt connection, snap connection, plug connection, lock connection, gluing or integral molding, and the present application does not impose any limitation on this.

[0098] In one possible embodiment, the second component 32 includes a third part 323 and a fourth part 324, the third part 323 is located on the side of the main body 312 facing away from the second surface 34, and the fourth part 324 is located on the side of the first component 31 facing away from the first area 311, and the third part 323 and the fourth part 324 are fixedly connected.

[0099] The third portion 323 is located on a side of the main body 312 facing away from the second surface 34 . Thus, the third portion 323 can restrict the main body 312 from moving in a direction facing away from the second surface 34 , thereby limiting the position of the first component 31 .

[0100] The fourth part 324 and the third part 323 may be fixedly connected by bolt connection, snap connection, plug connection, lock connection, gluing or integral molding, and this application does not impose any limitation on this.

[0101] In one possible embodiment, the main body 312 includes a second limiting notch 37, the second limiting notch 37 passes through the fourth surface 3121, the fourth surface 3121 is the surface of the main body 312 facing the second surface 34, the second component 32 includes a first portion 321 and a second portion 322 connected, the first portion 321 is located on the side of the fourth surface 3121 facing away from the third surface 35, the second portion 322 is accommodated in the second limiting notch 37, and the fourth surface 3121 is Figure 6 The lower surface of the middle body portion 312.

[0102] The second limiting notch 37 passes through the fourth surface 3121, and the second portion 322 is accommodated in the second limiting notch 37. In this way, after the second component 32 is formed, the second portion 322 cooperates with the first terminal fixing piece 3 to limit the second component 32 in the first direction X, restricting the first component 31 from moving along the first direction X, so that the first component 31 and the second component 32 are tightly matched after forming.

[0103] The second portion 322 also limits the first component 31 in the first direction X, restricting the first component 31 from moving along the first direction X, so that the first component 31 and the second component 32 fit tightly after molding.

[0104] For example, a plurality of second limiting notches 37 may be provided, and the second limiting notches 37 are arranged along the extension direction of the main body 312, such as along Figure 6 The second portions 322 are arranged in the X direction, and a plurality of second portions 322 can be provided, with one second portion 322 being accommodated in one second limiting notch 37 .

[0105] Specifically, the second limiting notches 37 may be provided at both ends along the extending direction of the first sub-component 301 , and the second limiting notches 37 may also be provided at both ends along the extending direction of the second sub-component 302 .

[0106] In summary, the cooperation between the protrusion 313 and the second limiting notch 37 and the second portion 322 can fix the relative positions of the first component 31 and the second component 32 , thereby improving the stability and service life of the terminal fixing member 3 .

[0107] In one possible embodiment, the terminal fixing member 3 includes a third limiting notch 38, the third limiting notch 38 is located at at least one end of the terminal fixing member 3 along the first direction X, the third limiting notch 38 passes through the second surface 34, and the main body 312 is opposite to the first area 311 (see Figure 4 ) forms at least a portion of the inner wall surface of the third limiting notch 38.

[0108] The third limiting notch 38 is located in the fourth portion 324 .

[0109] The third limiting notch 38 of the terminal fixing member 3 cooperates with the protrusion on the mold, so as to facilitate demoulding of the terminal fixing member 3 after molding.

[0110] When the first component 31 is placed in the mold, according to the above description of the first limiting notch 36 and the protrusion 313, the first component 31 is limited in the first direction X and the third direction Z. The protrusion on the mold that cooperates with the third limiting notch 38 can limit the position of the first component 31 in the second direction Y in the mold.

[0111] In summary, when the first component 31 is placed in the mold, its three mutually perpendicular directions are limited to fix the first component 31. During the injection molding process, the first component 31 remains in a fixed position, so that the shape of the second component 32 formed by injection molding is fixed.

[0112] Exemplarily, a plurality of third limiting notches 38 may be provided. The third limiting notches 38 are located at both ends of the terminal fixing member 3 along the first direction X, and a plurality of third limiting notches 38 may be provided at each end.

[0113] Continue to see Figure 4 In a possible embodiment, the cover plate 1 further includes a limit member 14, which is arranged on the side of the main body 11 facing the terminal fixing member 3, and the limit member 14 is arranged on at least one side of the terminal fixing member 3 along the first direction X. The limit member 14 is connected to the main body 11 and to the terminal fixing member 3.

[0114] The limiter 14 is arranged on the side of the main body 11 facing the terminal fixing member 3. The limiter 14 forms a limit on the terminal fixing member 3 in the first direction X, so that when the terminal fixing member 3 is installed on the cover plate 1, the terminal fixing member 3 is fixed in the position in the first direction X, thereby improving the stability of the device.

[0115] The limiting member 14 can also limit the terminal fixing member 3 in the second direction Y. Two wall surfaces spaced apart and opposite to each other along the Y direction are provided at positions corresponding to the terminal fixing member 3 and the limiting member 14. The two wall surfaces can be located on both sides of the limiting member 14 in the Y direction, so that the limiting member 14 limits the terminal fixing member 3 along the Y direction.

[0116] It should be noted that the terminal fixing member 3 can be limited in the second direction Y by the welding portion 12 .

[0117] For example, a plurality of limit members 14 may be provided, and the plurality of limit members 14 may be arranged on both sides of the terminal fixing member 3 along the first direction X. A plurality of limit members 14 may be provided on one of the two sides of the terminal fixing member 3 along the first direction X. A plurality of limit members 14 may provide a better fixing effect on the terminal fixing member 3.

[0118] For example, the limiting member 14 may be a protrusion protruding from the main body 11 , or may be a device welded to the cover plate 1 .

[0119] For example, the shape of the limiting member 14 can be cylindrical, rectangular or other shapes.

[0120] like Figure 7 As shown, Figure 7 yes Figure 3 Schematic diagram of the cross section in the AA direction. Figure 4 and Figure 7 In one possible embodiment, the cover plate assembly 120 further includes a first pole 2, a lead-out plate 4, a second pole 5, and a top spacer 6, wherein the first pole 2 is located on the side of the terminal fixing member 3 facing away from the cover plate 1, and the first pole 2 is used to establish a channel for the electrons inside the battery 100 to connect to the outside.

[0121] The top spacer 6 is located on a side of the main body 11 facing away from the first pole 2 . The top spacer 6 is provided between the lead-out piece 4 and the cover plate 1 for insulation.

[0122] The lead-out piece 4 is located on the side of the top spacer 6 facing away from the main body 11 . The lead-out piece is used to connect to the battery cell. The second pole 5 is fixedly connected to the lead-out piece 4 , and the second pole 5 and the lead-out piece 4 are conductive.

[0123] The second pole 5 sequentially passes through the top spacer 6, the cover plate 1, the terminal fixing member 3 and the first pole 2 along the thickness direction of the cover plate assembly 120, and the second pole 5 is connected to the first pole 2. The second pole 5 and the first pole 2 are electrically connected.

[0124] In one possible embodiment, the cover plate assembly 120 further includes a rubber pad 7, which is disposed between the first pole 2 and the cover plate 1, and also between the first pole 2 and the top spacer 6. The rubber pad 7 is used for sealing, insulation, and buffering.

[0125] The present application also provides an electrical device, wherein the electrical device includes the battery 100 described above, and the electrical device is electrically connected to the battery 100. The electrical device includes but is not limited to electronic products, vehicles, power tools, household appliances, portable devices, outdoor equipment, medical equipment, etc.

[0126] Specifically, means of transportation include but are not limited to vehicles, bicycles, motorcycles, etc.; power tools include but are not limited to electric drills, electric saws, etc.; household appliances include but are not limited to vacuum cleaners, sweeping robots, air conditioners, refrigerators, etc.; portable devices include but are not limited to portable power banks, portable speakers, drones, etc.; outdoor equipment includes but is not limited to mobile power supplies, camping lights, etc.; medical equipment includes but is not limited to heart rate monitors, etc.

[0127] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprise" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. The fact that certain measures are recorded in different dependent claims does not mean that these measures cannot be combined to produce good results.

[0128] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

[0129] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A cover plate assembly (120), characterized in that: include: A cover plate (1), comprising a main body portion and a welding portion (12) connected to a side periphery of the main body portion (11); A terminal fixing member (3), wherein the terminal fixing member (3) is located on one side of the main body (11) along the thickness direction of the main body (11), and the welding portion (12) is located on the peripheral side of the terminal fixing member (3); the terminal fixing member (3) includes a first component (31), the surface of the first component (31) facing the welding portion (12) is a first region (311), the surface of the terminal fixing member (3) facing the welding portion (12) is a first surface (33), the first region (311) forms at least a part of the first surface (33), at least a part of the positive projection of the welding portion (12) on the first surface (33) is located in the first region (311), and the melting point of the first component (31) is higher than the melting point of the welding portion (12).

2. The cover plate assembly (120) according to claim 1, characterized in that The welding portion (12) includes a first welding portion (121), and the first component (31) includes a first subcomponent (301); The surface of the terminal fixing member (3) facing the first welding portion (121) is a first sub-surface (331), the surface of the first sub-component (301) facing the first welding portion (121) is a first sub-region (303), and at least part of the positive projection of the first welding portion (121) on the first sub-surface (331) is located within the first sub-region (303).

3. The cover plate assembly (120) according to claim 2, characterized in that: The welding portion (12) includes a second welding portion (122), and the first welding portion (121) and the second welding portion (122) are respectively located on opposite sides of the terminal fixing member (3); the first component (31) includes a second subcomponent (302); The surface of the terminal fixing member (3) facing the second welding portion (122) is a second sub-surface (332), the surface of the second sub-component (302) facing the second welding portion (122) is a second sub-region (304), and at least part of the positive projection of the second welding portion (122) on the second sub-surface (332) is located within the second sub-region (304).

4. The cover plate assembly (120) according to claim 3, characterized in that The welding portion (12) comprises a third welding portion (123) and a fourth welding portion (124) respectively arranged on opposite sides of the terminal fixing member (3); the arrangement direction of the third welding portion (123) and the fourth welding portion (124) is perpendicular to the arrangement direction of the first welding portion (121) and the second welding portion (122); The distance between the third welding portion (123) and the fourth welding portion (124) and the terminal fixing member (3) is greater than the distance between the first welding portion (121) and the second welding portion (122) and the terminal fixing member (3).

5. The cover plate assembly (120) according to claim 1, characterized in that: The terminal fixing member (3) further includes a second component (32), the first component (31) is embedded in the second component (32), and the melting point of the first component (31) is higher than the melting point of the second component (32).

6. The cover plate assembly (120) according to claim 5, characterized in that: The first component (31) is a ceramic component or a metal component, and the second component (32) is a plastic component.

7. The cover plate assembly (120) according to claim 6, characterized in that: The terminal fixing member (3) comprises a second surface (34) and a third surface (35) facing each other along the thickness direction of the terminal fixing member (3), wherein the second surface (34) faces the main body (11) and the third surface (35) faces away from the main body (11); or the second surface (34) faces away from the main body (11) and the third surface (35) faces the main body (11); The terminal fixing member (3) further comprises at least one first limiting notch (36), the at least one first limiting notch (36) passing through the first surface (33) and the second surface (34), and at least a portion of the first limiting notch (36) is located in the first component (31).

8. The cover plate assembly (120) according to claim 7, characterized in that: The first component (31) comprises: a main body portion (312), wherein at least a portion of the first limiting notch (36) is located in the main body portion (312); At least one protrusion (313), the at least one protrusion (313) is located on a side of the main body (312) facing away from the at least one first limiting notch (36), the at least one protrusion (313) is fixedly connected to the main body (312), the surface of the protrusion (313) facing away from the main body (11) forms at least a portion of the third surface (35); and the surface of the protrusion (313) facing away from the second component (32) forms at least a portion of the first surface (33).

9. The cover plate assembly (120) according to claim 8, characterized in that: The main body (312) includes: a second limiting notch (37), the second limiting notch (37) passing through the fourth surface (3121), the fourth surface (3121) being the surface of the main body (312) facing the second surface (34); The second component (32) includes a first portion (321) and a second portion (322) that are connected, wherein the first portion (321) is located on the side of the fourth surface (3121) facing away from the third surface (35), and the second portion (322) is accommodated in the second limiting notch (37).

10. The cover plate assembly (120) according to claim 9, characterized in that: The terminal fixing member (3) comprises: A third limiting notch (38), the third limiting notch (38) is located at at least one end of the terminal fixing member (3) along the length direction of the second component (32), the third limiting notch (38) passes through the second surface (34), and the portion of the surface of the main body (312) facing away from the first area (311) forms at least a portion of the inner wall surface of the third limiting notch (38).

11. The cover plate assembly (120) according to claim 9, characterized in that: The second component (32) includes a third part (323) and a fourth part (324), wherein the third part (323) is located on the side of the main body (312) facing away from the second surface (34), and the fourth part (324) is located on the side of the first component (31) facing away from the first area (311), the third part (323) and the fourth part (324) are fixedly connected, and the third limiting notch (38) is located in the fourth part (324).

12. The cover plate assembly (120) according to any one of claims 1 to 11, characterized in that: The cover plate (1) further comprises: A limiting member (14), the limiting member (14) is arranged on a side of the main body (11) facing the terminal fixing member (3), and the limiting member (14) is arranged on at least one side of the terminal fixing member (3) along the length direction of the second component (32), and the limiting member (14) is connected to the main body (11) and to the terminal fixing member (3).

13. The cover plate assembly (120) according to any one of claims 1 to 11, characterized in that: Also includes: a first pole (2), the first pole (2) being located on a side of the terminal fixing member facing away from the cover plate; a top spacer (6), the top spacer (6) being located on a side of the main body (11) facing away from the first pole (2); A lead-out piece (4), the lead-out piece (4) being located on a side of the top spacer (6) facing away from the main body (11); A second pole (5), the second pole (5) is fixedly connected to the lead-out piece (4), and sequentially penetrates the top spacer (6), the cover plate (1), the terminal fixing member (3) and the first pole (2) along the thickness direction of the cover plate assembly (120), and the second pole (5) is connected to the first pole (2).

14. A battery (100), characterized in that include: A housing (110), the housing (110) comprising a receiving cavity having an opening; A battery cell, the battery cell being disposed in the accommodating cavity; A cover plate assembly (120), wherein the cover plate assembly (120) covers the opening, the welding portion (12) is connected to the shell (110), the first pole (2) is electrically connected to the battery cell, and the cover plate assembly (120) is the cover plate assembly (120) according to any one of claims 1 to 13.

15. An electrical device, characterized in that: include: An electrical device and the battery (100) according to claim 14, wherein the electrical device and the battery (100) are electrically connected.

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