Cover plate assembly for battery, battery and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a cover plate assembly for a battery, the battery and electric equipment, and the cover plate assembly is characterized in that a first through hole is formed in the surface of a cover plate; a second through hole is formed in the adapter plate; the pole part sequentially penetrates through the first through hole and the second through hole; and the pole part passes through the end part of one side of the second through hole and is connected with the adapter sheet in a girth welding manner. According to the utility model, the through hole which is in annular welding connection with the pole part is arranged on the adapter sheet, so that the welding quality and stability are improved, the tolerance influence is reduced, and meanwhile, a large overcurrent surface is formed at the matching position of the pole part and the bar sheet, so that the problem that the overcurrent capability is reduced due to resistance rise caused by welding is solved, the welding surface is greatly reduced, and the through-current capability is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cover plate assembly for a battery, a battery, and an electrical device. Background Technology

[0002] Lithium-ion or sodium-ion batteries have advantages such as light weight, large energy storage, high power, no pollution, long life, low self-discharge coefficient, and wide temperature adaptability, and are gradually attracting attention from the new energy industry. However, in existing technologies, due to design flaws in the cover plate structure, problems such as high cost and easy leakage are easily caused, leading to battery failure. For example, in the current process of electrode welding, the welding stability is poor, and the weld joint is easily corroded by the electrolyte. Utility Model Content

[0003] This utility model provides a cover plate assembly for a battery, a battery, and an electrical device to solve the defects of poor welding stability and easy corrosion of the weld by electrolyte in the existing electrode welding process.

[0004] According to a first aspect of the present invention, a cover plate assembly for a battery includes: a cover plate, an adapter plate, and a terminal post; the surface of the cover plate is provided with a first through hole; the adapter plate is provided with a second through hole; the terminal post passes through the first through hole and the second through hole in sequence; wherein, one end of the terminal post passing through the second through hole is circumferentially welded to the adapter plate.

[0005] According to one embodiment of the present invention, it further includes: an insulating member, which is disposed on the side of the cover plate away from the adapter piece and is arranged around the pole portion protruding from the outer periphery of the cover plate surface.

[0006] Specifically, this embodiment provides an implementation method for an insulating component.

[0007] According to one embodiment of the present invention, the insulating member has a groove on the side facing away from the cover plate to accommodate a portion of the pole post.

[0008] Specifically, this embodiment provides an implementation method for a settling tank.

[0009] According to one embodiment of the present invention, it further includes an insulating plate disposed between the cover plate and the adapter piece.

[0010] Specifically, this embodiment provides an implementation method for an insulating plate, including the arrangement of the insulating plate.

[0011] According to one embodiment of the present invention, it further includes a sealing part, which is disposed between the cover plate and the pole post.

[0012] Specifically, this embodiment provides an implementation of a sealing portion.

[0013] According to one embodiment of the present invention, the sealing part includes: a first sealing ring and a second sealing ring; the first sealing ring is disposed between the cover plate and the pole post; at least a portion of the second sealing ring passes through the first through hole and is disposed between the peripheral wall of the first through hole and the pole post; wherein the first sealing ring and the second sealing ring are connected to form an inverted L-shaped sealing structure.

[0014] Specifically, this embodiment provides an implementation of a first sealing ring and a second sealing ring.

[0015] According to one embodiment of the present invention, the pole post includes: a first pole post and a second pole post; the first pole post and the second pole post are integrally formed; wherein, at least the second pole post passes through the first through hole and the second through hole in sequence.

[0016] Specifically, this embodiment provides an implementation of a first pole piece and a second pole piece.

[0017] According to one embodiment of the present invention, a countersunk hole is provided on the other end face where the first pole piece connects to the second pole piece, and the countersunk hole and the end face of the first pole piece are smoothly connected.

[0018] Specifically, this embodiment provides an implementation method for countersunk holes.

[0019] According to one embodiment of the present invention, the material of the contact position between the adapter piece and the pole piece is the same.

[0020] Specifically, this embodiment provides an implementation of an adapter plate and a pole piece.

[0021] According to one embodiment of the present invention, the second pole piece is circumferentially welded to the adapter piece.

[0022] Specifically, this embodiment provides an implementation of a second pole piece and an adapter plate.

[0023] According to one embodiment of the present invention, the electrode post is a negative electrode post, and the negative electrode post further includes: a third electrode post; the third electrode post is welded to the second electrode post and at least covers the surfaces of the first electrode post and the second electrode post facing the cover plate; wherein, the third electrode post is circumferentially welded to the adapter piece.

[0024] Specifically, this embodiment provides an implementation method for a third pole piece.

[0025] According to one embodiment of the present invention, the materials of the third pole piece and the contact piece are the same.

[0026] Specifically, this embodiment provides an implementation of a third pole piece and an adapter plate.

[0027] A battery according to a second aspect of the present invention includes the aforementioned cover plate assembly for the battery.

[0028] According to a third aspect of the present invention, an electrical device includes the aforementioned cover plate assembly for a battery.

[0029] Alternatively, the battery mentioned above.

[0030] The above-mentioned one or more technical solutions of this utility model have at least one of the following technical effects: The cover plate assembly, battery and electrical equipment for battery provided by this utility model improves the welding quality and stability and reduces the influence of tolerance by opening through holes on the adapter plate for circumferential welding to the terminal post. At the same time, the terminal post and the bar plate form a large flow surface, which solves the problem of increased resistance caused by welding and thus reduced current carrying capacity, greatly reduces the welding surface and improves current carrying capacity.

[0031] This utility model provides a cover plate assembly for a battery, a battery, and an electrical device. The terminal post structure used in the assembly can solve the problem of cover plate assembly tolerance, so that the compression of the sealing part is only affected by the insulating parts, thus ensuring the sealing performance of the battery.

[0032] This utility model provides a cover plate assembly for a battery, a battery, and an electrical device. The terminal post has a countersunk hole for welding with a bar sheet. The bar sheet is welded to the lowest point of the countersunk hole, which serves as a welding positioning element. Furthermore, the countersunk hole smoothly transitions to the first terminal post, also acting as a guide during the bar sheet welding process. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is one of the assembly relationship diagrams of the cover plate assembly for batteries provided by this utility model;

[0035] Figure 2 This is the second schematic diagram of the assembly relationship of the cover plate assembly for the battery provided by this utility model;

[0036] Figure 3 This is the third schematic diagram of the assembly relationship of the cover plate assembly for the battery provided by this utility model;

[0037] Figure 4 This is the fourth schematic diagram of the assembly relationship of the cover plate assembly for the battery provided by this utility model;

[0038] Figure 5 This is the fifth schematic diagram of the assembly relationship of the cover plate assembly for the battery provided by this utility model;

[0039] Figure 6 This is one of the schematic diagrams showing the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0040] Figure 7 This is the second schematic diagram of the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0041] Figure 8 This is the third schematic diagram of the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0042] Figure 9 This is the fourth schematic diagram of the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0043] Figure 10 This is the fifth schematic diagram of the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0044] Figure 11 This is the sixth schematic diagram of the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0045] Figure 12 This is the seventh schematic diagram of the structural relationship of the insulating plate in the cover plate assembly for batteries provided by this utility model;

[0046] Figure 13 This is one of the schematic diagrams showing the structural relationship of the sealing part in the cover plate assembly for batteries provided by this utility model;

[0047] Figure 14 This is the second schematic diagram of the structural relationship of the sealing part in the cover plate assembly for batteries provided by this utility model;

[0048] Figure 15 This is the third schematic diagram showing the structural relationship of the sealing part in the cover plate assembly for batteries provided by this utility model.

[0049] Figure label:

[0050] 10. Cover plate; 101. First through hole; 102. Injection hole; 103. Mounting hole;

[0051] 20. Adapter piece; 201. Second through hole;

[0052] 30. Pole post section; 301. First pole post; 302. Second pole post; 303. Countersunk hole; 304. Third pole post;

[0053] 40. Insulating components; 401. Settling tank;

[0054] 50. Insulating plate; 51. Injection channel; 52. Injection port; 53. Channel bottom wall; 54. Channel side wall; 55. Explosion-proof hole; 56. Pressing plate;

[0055] 60. Sealing part; 601. First sealing ring; 602. Second sealing ring;

[0056] 70. Explosion-proof valve. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] The present invention will now be described in detail with reference to specific embodiments.

[0060] In some specific embodiments of this utility model, such as Figures 1 to 15As shown, this solution provides a cover plate assembly for a battery, including: a cover plate 10, an adapter piece 20, and a terminal post 30; the surface of the cover plate 10 is provided with a first through hole 101; the adapter piece 20 is provided with a second through hole 201; the terminal post 30 passes through the first through hole 101 and the second through hole 201 in sequence; wherein, one end of the terminal post 30 passing through the second through hole 201 is circumferentially welded to the adapter piece 20.

[0061] It should be noted that the end of the pole post 30 is circumferentially welded to the adapter plate 20 through the second through hole 201, which improves the welding quality and ensures the integrity of the flow surface of the end of the pole post 30 away from the adapter plate 20, thereby improving the flow capacity.

[0062] In some possible embodiments of this utility model, it further includes: an insulating member 40, which is disposed on the side of the cover plate 10 away from the adapter piece 20 and is wrapped around the pole post 30 and protrudes from the outer periphery of the surface of the cover plate 10.

[0063] Specifically, this embodiment provides an implementation of an insulating member 40, which is wrapped around the pole post 30 and protrudes from the upper surface of the cover plate 10, thus avoiding the occurrence of short circuit problems.

[0064] Furthermore, the installation of the insulating component 40 can improve the radial accuracy of the pole post 30 along the first through hole 101. Combined with the overall structure, the installation tolerance of the pole post 30 is only affected by the insulating component 40.

[0065] In a possible embodiment, the upper edge of the insulating member 40 and the upper end face of the pole portion 30 have a height difference.

[0066] In a possible embodiment, the insulating element 40 is made of insulating plastic.

[0067] In some possible embodiments of this utility model, the insulating member 40 is provided with a recess 401 for accommodating a portion of the pole post 30 on the side facing away from the cover plate 10.

[0068] Specifically, this embodiment provides an implementation of a sink 401. The insulating member 40 is provided with a sink 401 to accommodate a portion of the pole post 30. During use, it avoids short circuits and also positions the pole post 30.

[0069] In some possible embodiments of this utility model, it further includes: an insulating plate 50, which is disposed between the cover plate 10 and the adapter piece 20.

[0070] It should be noted that the insulating plate 50 serves two purposes: firstly, it provides insulation; secondly, in conjunction with the overall structure, it ensures that the sealing part 60 is only affected by the dimensional accuracy of the insulating plate 50, thus avoiding the cumulative error problem caused by multiple sealing rings.

[0071] In some possible embodiments of this utility model, a sealing part 60 is also included, which is disposed between the cover plate 10 and the pole post 30.

[0072] Specifically, this embodiment provides an implementation of a sealing part 60, which is disposed between the pole post 30 and the cover plate 10. At the same time, the sealing part 60 bears dual pressure from the pole post 30 and the cover plate 10, namely pressure in both the lateral and longitudinal directions. This solves the problem of needing to set multiple sealing rings in the past, and realizes sealing in both the lateral and longitudinal directions with a single sealing ring, ensuring the sealing effect and avoiding leakage after assembly due to insufficient compression.

[0073] In some possible embodiments of this utility model, the sealing part 60 includes: a first sealing ring 601 and a second sealing ring 602; the first sealing ring 601 is disposed between the cover plate 10 and the pole post 30; at least a portion of the second sealing ring 602 passes through the first through hole 101 and is disposed between the peripheral wall of the first through hole 101 and the pole post 30; wherein the first sealing ring 601 and the second sealing ring 602 are connected to form an inverted L-shaped sealing structure.

[0074] Specifically, this embodiment provides an implementation of a first sealing ring 601 and a second sealing ring 602. By setting a sealing part 60 with an inverted L-shaped cross-section, a portion of the sealing part 60 abuts against the cover plate 10 and the pole post 30, while another portion of the sealing part 60 passes through the first through hole 101 and abuts against the insulating plate 50, ensuring that the sealing part 60 is under pressure throughout the entire assembly and use process. The first sealing ring 601 is used to achieve at least axial sealing, and the second sealing ring 602 is used to achieve at least radial sealing.

[0075] It should be noted that by setting the sealing part 60 as a separate structure of the first sealing ring 601 and the second sealing ring 602, sealing is achieved using existing sealing rings, reducing costs. At the same time, the first sealing ring 601 and the second sealing ring 602 are subjected to lateral and longitudinal pressures in one installation position, ensuring the sealing effect.

[0076] In a possible embodiment, the sealing part 60 is an integral structure.

[0077] In a possible embodiment, the sealing part 60 is a split structure.

[0078] In some possible embodiments of this utility model, the pole post 30 includes: a first pole post 301 and a second pole post 302; the first pole post 301 and the second pole post 302 are integrally formed; wherein, at least the second pole post 302 passes through the first through hole 101 and the second through hole 201 in sequence.

[0079] Specifically, this embodiment provides an implementation of a first pole piece 301 and a second pole piece 302. By setting the first pole piece 301 and the second pole piece 302, a seal is achieved by the sealing part 60 between the first pole piece 301 and the insulating plate 50. At the same time, the second pole piece 302 is circumferentially welded to the adapter piece 20 to improve the welding and ensure the integrity of the flow surface on the first pole piece 301.

[0080] In possible embodiments, the outer periphery of the first pole post 301 is formed as a square-like structure with chamfers, or a square structure, etc.

[0081] In a possible embodiment, the cross-sectional area of ​​the first pole piece 301 is larger than the cross-sectional area of ​​the second pole piece 302, and the cross-section is parallel to the surface of the cover plate 10.

[0082] In some possible embodiments of this utility model, a countersunk hole 303 is provided on the other end face where the first pole post 301 and the second pole post 302 are connected, and the countersunk hole 303 and the end face of the first pole post 301 are smoothly connected.

[0083] Specifically, this embodiment provides an implementation of a countersunk hole 303. The countersunk hole 303 provided on the surface of the first pole piece 301 facilitates welding with the bar plate. Since the pole piece 30 is circumferentially welded to the adapter piece 20 through the second pole piece 302, the countersunk hole 303 can form a complete flow surface to ensure flow capacity.

[0084] Furthermore, the smooth transition between the countersunk hole 303 and the end face of the first pole piece 301 also enables the bar piece to play a guiding role when it is engaged with the countersunk hole 303, thus improving the ease of connection.

[0085] In some possible embodiments of this utility model, the materials of the contact positions of the adapter piece 20 and the pole piece 30 are the same.

[0086] Specifically, this embodiment provides an implementation of an adapter piece 20 and a terminal post 30, wherein the materials of the contact position of the adapter piece 20 and the terminal post 30 are the same, and the terminal post 30 is the positive electrode of the battery.

[0087] In a possible embodiment, the contact points of the adapter piece 20 and the pole piece 30 are made of the same material, namely aluminum.

[0088] In some possible embodiments of this utility model, the second pole piece 302 is circumferentially welded to the adapter piece 20.

[0089] Specifically, this embodiment provides an implementation of the second electrode post 302 and the adapter piece 20. The second electrode post 302 and the adapter piece 20 are connected by circumferential welding, so that when the electrode post 30 is used as the positive electrode, the integrity of the flow surface can be ensured by circumferential welding between the second electrode post 302 and the adapter piece 20.

[0090] In some possible embodiments of this utility model, the electrode post 30 is a negative electrode post, and the negative electrode post further includes: a third electrode post 304; the third electrode post 304 is connected to the second electrode post 302 and at least covers the surface of the first electrode post 301 and the second electrode post 302 facing the cover plate 10; wherein, the third electrode post 304 is circumferentially welded to the adapter piece 20.

[0091] Specifically, this embodiment provides an implementation of a third electrode post 304. The third electrode post 304 is provided so that when the electrode post 30 is used as the negative electrode of the battery, both the third electrode post 304 and the adapter plate 20 can be made of copper. The third electrode post 304 is connected to the second electrode post 302. On the one hand, the aluminum second electrode post 302 and the first electrode post 301 can be made of aluminum material, which is convenient for welding with the bar plate. On the other hand, the copper third electrode post 304 completely isolates the first electrode post 301 and the second electrode post 302 from the electrolyte, avoiding the problem of corrosion caused by contact between the electrolyte and the copper-aluminum welding surface.

[0092] In a possible embodiment, the third pole post 304 and the second pole post 302 are connected to form a plate by a composite casting method, and then formed by stamping. The composite casting method includes composite casting, reverse solidification, spray coating composite method, brazing method, casting and rolling method, etc.

[0093] In some possible embodiments of this utility model, the third pole post 304 and the adapter piece 20 are made of the same material at their contact points.

[0094] Specifically, this embodiment provides an implementation of a third electrode post 304 and an adapter piece 20. The materials of the contact position of the third electrode post 304 and the adapter piece 20 are the same, and at this time, the electrode post 30 is the negative electrode of the battery.

[0095] In a possible embodiment, the third electrode post 304 and the adapter piece 20 are both made of copper, while the first electrode post 301 and the second electrode post 302 are made of aluminum. This arrangement solves the welding problem when the existing negative electrode post is made of copper-aluminum composite material, and the structure can avoid the problem of electrolyte corrosion at the copper-aluminum interface.

[0096] In some possible embodiments of this utility model, it further includes: a cover plate 10, on which an injection hole 102 is provided, the injection hole 102 being used to inject electrolyte into the battery; an insulating plate 50, which is disposed against the cover plate 10 and is disposed at one end of the cover plate 10 near the inside of the battery; an injection channel 51, disposed on the insulating plate 50, the inlet end of the injection channel 51 being correspondingly disposed to the injection hole 102, the outlet end of the injection channel 51 being provided with an outlet 52, and a closed end being provided on the side of the injection channel 51 near the narrow side of the insulating plate 50; wherein, the projection of the outlet 52 on the cover plate 10 does not overlap with the injection hole 102.

[0097] It should be noted that the inlet end of the liquid injection channel 51 provided on the insulating plate 50 corresponds to the liquid injection hole 102 of the cover plate 10, and the projection of the outlet 52 formed by the outlet end of the liquid injection channel 51 on the cover plate does not overlap with the liquid injection hole 102, which can prevent the electrolyte from directly rinsing the bare cell.

[0098] Furthermore, a closed end is provided on the side of the injection channel 51 near the end face of the insulating plate 50, and a closed end is provided on the narrow side of the insulating plate 50 where the injection channel 51 and the adjacent pole post are located.

[0099] In a possible embodiment, the closed end is an arc-shaped end face.

[0100] In a possible embodiment, the closed end is the narrow end of the injection channel 51.

[0101] Furthermore, the closed end face indicates that no liquid outlet is provided at this position to prevent the electrode tab from being inserted into the liquid injection channel 51 when the electrode tab is welded to the electrode post.

[0102] In some possible embodiments of this utility model, the injection channel 51 includes: a channel bottom wall 53 and a channel side wall 54; the channel bottom wall 53 is spaced apart from the plate body of the insulating plate 50, and the plate body of the insulating plate 50 abuts against the cover plate 10; the channel side wall 54 is connected to the channel bottom wall 53 and the plate body of the insulating plate 50 respectively.

[0103] Specifically, this embodiment provides an implementation of a channel bottom wall 53 and a channel side wall 54. By setting the liquid injection channel 51 to include a channel bottom wall 53 and a channel side wall 54, a liquid injection chamber for containing electrolyte is formed on the side of the insulating plate 50 away from the cover plate 10. The liquid injection chamber solves the problem of the narrowness of the existing liquid injection channel 51 and can guide the electrolyte to a new outlet. At the same time, the electrolyte can be buffered in the liquid injection channel 51 to avoid directly scouring the surface of the bare battery cell.

[0104] In some possible embodiments of this utility model, the cover plate 10 is provided with a mounting hole 103 for installing the explosion-proof valve 70, and the mounting hole 103 is spaced apart from the injection hole 102; the insulating plate 50 is provided with an explosion-proof hole 55 corresponding to the mounting hole 103.

[0105] Specifically, this embodiment provides an implementation of mounting hole 103 and explosion-proof hole 55. The mounting hole 103 provides an installation position for explosion-proof valve 70, while the explosion-proof hole 55 on insulating plate 50 also provides a pressure relief channel when battery failure occurs.

[0106] In some possible embodiments of this utility model, it further includes: a pressing plate 56, which is connected to the insulating plate 50 and is provided corresponding to the explosion-proof hole 55, for pressing the bare battery cell; wherein, the distance between the pressing plate 56 and the bare battery cell is less than the distance between the bottom wall of the channel 53 and the bare battery cell.

[0107] Specifically, this embodiment provides an implementation of a pressing plate 56. The height difference between the pressing plate 56 and the bottom wall 53 of the channel allows the pressing plate 56 to press the bare battery cell, preventing the bare battery cell from blocking the liquid outlet 52 and causing blockage of the liquid injection channel 51.

[0108] In some possible embodiments of this utility model, the liquid outlet 52 is disposed on the channel sidewall 54 near the explosion-proof hole 55.

[0109] Specifically, this embodiment provides an implementation of the liquid outlet 52, which is located on the side wall 54 of the channel. This can prevent the side insertion of the electrode tab from affecting the liquid injection and also ensure the strength of the overall structure.

[0110] In some possible embodiments of this utility model, the liquid outlet 52 is disposed on the bottom wall 53 of the channel; wherein, the length of the bottom wall 53 of the channel is greater than or equal to the maximum diameter of the explosion-proof hole 55, and the side wall 54 of the channel is arc-shaped.

[0111] Specifically, this embodiment provides another implementation of the liquid outlet 52. The liquid outlet 52 is provided with a channel bottom wall 53, and the length of the channel bottom wall 53 is greater than or equal to the maximum aperture of the explosion-proof hole 55. This ensures that when the liquid outlet 52 is provided with the channel bottom wall 53, the liquid output can be guaranteed to the maximum extent, and the electrolyte can be prevented from being blocked in the liquid injection channel 51.

[0112] In some possible embodiments of this utility model, the liquid outlet 52 is a through hole provided on the bottom wall 53 of the channel; wherein, from the projection center of the injection hole 102 on the bottom wall 53 of the channel towards the side wall 54 of the channel, the liquid outlet area of ​​the liquid outlet 52 gradually increases.

[0113] Specifically, this embodiment provides another implementation of the liquid outlet 52. The liquid outlet area of ​​the liquid outlet 52 gradually increases according to a certain rule. That is, the diameter of the liquid outlet 52 near the injection hole 102 is smaller than the diameter of the liquid outlet 52 far from the injection hole 102. This allows the electrolyte entering through the injection hole 102 to flow out more quickly at the end far from the injection hole 102. At the same time, it avoids the problem that during high-pressure liquid injection, after the electrolyte enters the injection channel 51 through the injection hole 102, it flows out directly from the closer liquid outlet 52, thereby directly scouring the bare battery cell.

[0114] In some possible embodiments of this utility model, the injection flow area of ​​the injection hole 102 is smaller than the sum of the discharge flow areas of all the discharge ports 52.

[0115] Specifically, this embodiment provides an implementation of the injection hole 102 and the outlet 52, which ensures the output of electrolyte and allows the electrolyte to pass smoothly through the injection channel 51, avoiding blockage.

[0116] In some specific embodiments of this utility model, such as Figures 1 to 15 As shown, this solution provides a battery, including the aforementioned cover assembly for the battery.

[0117] In some specific embodiments of this utility model, such as Figures 1 to 15 As shown, this solution provides an electrical device, including the aforementioned cover plate assembly for a battery;

[0118] Alternatively, the battery mentioned above.

[0119] In possible embodiments, the electrical equipment is at least an engineering vehicle, construction machinery, passenger electric vehicle, energy storage system, etc.

[0120] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to 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 the embodiments of this utility model according to the specific circumstances.

[0121] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0122] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this utility model do not depart from the spirit and scope of the technical solutions of this utility model and should be covered within the scope of the claims of this utility model.

Claims

1. A cover plate assembly for a battery, characterized by include: Cover plate (10), adapter plate (20) and pole post (30); The surface of the cover plate (10) is provided with a first through hole (101); The adapter piece (20) is provided with a second through hole (201); The pole section (30) passes through the first through hole (101) and the second through hole (201) in sequence. The pole post (30) passes through the second through hole (201) and is circumferentially welded to the adapter piece (20).

2. The cover plate assembly for a battery of claim 1, wherein, Also includes: An insulating element (40) is disposed on the side of the cover plate (10) away from the adapter piece (20) and is arranged around the pole post (30) protruding from the outer periphery of the surface of the cover plate (10).

3. The cover plate assembly for a battery of claim 2, wherein, The insulating member (40) has a groove (401) on the side facing away from the cover plate (10) to accommodate part of the pole section (30).

4. The cover plate assembly for a battery of claim 1, wherein, Also includes: An insulating plate (50) is disposed between the cover plate (10) and the adapter plate (20).

5. The cover plate assembly for a battery of claim 1, wherein, Also includes: A sealing part (60) is disposed between the cover plate (10) and the pole post (30).

6. The cover plate assembly for a battery of claim 5, wherein, The sealing part (60) includes: a first sealing ring (601) and a second sealing ring (602); The first sealing ring (601) is disposed between the cover plate (10) and the pole post (30); At least a portion of the second sealing ring (602) passes through the first through hole (101) and is disposed between the peripheral wall of the first through hole (101) and the pole portion (30); The first sealing ring (601) and the second sealing ring (602) are connected to form an inverted L-shaped sealing structure.

7. The cover plate assembly for a battery of any one of claims 1 to 6, wherein, The pole section (30) includes: a first pole body (301) and a second pole body (302); The first pole piece (301) and the second pole piece (302) are integrally formed structures; Among them, at least the second pole piece (302) passes through the first through hole (101) and the second through hole (201) in sequence.

8. The cover plate assembly for a battery of claim 7, wherein, The other end face of the first pole piece (301) connected to the second pole piece (302) is provided with a countersunk hole (303), and the countersunk hole (303) and the end face of the first pole piece (301) are smoothly connected.

9. The cover plate assembly for a battery of claim 7, wherein, The material of the contact position between the adapter plate (20) and the pole post (30) is the same.

10. The cover plate assembly for a battery of claim 7, wherein, The second pole piece (302) is circumferentially welded to the adapter piece (20).

11. The cover plate assembly for a battery of claim 7, wherein, The electrode post (30) is a negative electrode post, and the negative electrode post further includes a third electrode post (304). The third pole piece (304) is connected to the second pole piece (302) and at least covers the surfaces of the first pole piece (301) and the second pole piece (302) facing the cover plate (10); The third pole piece (304) is circumferentially welded to the adapter piece (20).

12. The cover plate assembly for a battery of claim 11, wherein, The materials at the contact points of the third pole piece (304) and the adapter piece (20) are the same.

13. A battery, characterized by Includes the cover plate assembly for the battery as described in any one of claims 1 to 12.

14. An electrical device, characterized by A cover plate assembly for a battery as claimed in any one of claims 1 to 12; Or, a battery as claimed in claim 13.

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