Battery cover plate assembly, battery assembly and electric equipment

Abstract

The utility model relates to a battery cover plate assembly. The battery cover plate assembly comprises an electrode terminal, a cover plate body, a first insulating part and a second insulating part, the cover plate body is provided with a mounting hole, and the electrode terminal penetrates through the mounting hole. The electrode terminal comprises a first connecting part and a second connecting part, the first connecting part is used for being electrically connected with the busbar, the second connecting part is used for being connected with the pole core, and through the design, the area of the first connecting part of the electrode terminal can be obviously increased, so that the current-carrying capacity of the battery is improved.

Description

Technical Field

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

[0002] As lithium-ion battery technology matures and is widely used in electric vehicles and energy storage, the performance requirements for them are constantly increasing. Current battery designs have relatively low current-carrying capacity, which cannot meet the growing demand for batteries. Utility Model Content

[0003] One of the main objectives of this invention is to overcome at least one of the defects of the prior art and provide a battery cover assembly with strong current carrying capacity.

[0004] The second objective of this utility model is to provide a battery cell that, through the provision of a battery cover assembly, can effectively simplify the assembly process of the battery casing and improve charging and discharging efficiency.

[0005] The third objective of this utility model is to provide an electrical device that, through the provision of a battery cover assembly, can effectively simplify the assembly process of the battery casing and improve charging and discharging efficiency.

[0006] The battery cover assembly proposed according to this utility model includes:

[0007] Electrode terminals; and a cover plate body. The cover plate body has a mounting hole that penetrates the cover plate body; the electrode terminal is disposed in the mounting hole, and the electrode terminal includes a first connecting part and a second connecting part, the first connecting part being used for electrical connection with a busbar, and the second connecting part being used for connection with an electrode core.

[0008] According to the battery cover assembly proposed in this utility model, the cover body has a mounting hole penetrating the cover body. The electrode terminal includes a first connecting part and a second connecting part. By passing the electrode terminal through the mounting hole, the first connecting part of the electrode terminal is used for electrical connection with the busbar, and the second connecting part is used for connection with the electrode core, simplifying the electrical lead-out path of the battery cell. Furthermore, by passing the electrical lead-out terminal through the cover assembly, the first connecting part and the second connecting part of the electrode terminal are respectively connected to the busbar and the electrode core, thus shortening the electrical lead-out path. This helps to save the space occupied by the battery cover in the height direction, and the shortened electrical lead-out path also improves the battery's current carrying capacity.

[0009] According to one embodiment, the area of ​​the first connection portion of the electrode terminal is S, and the area of ​​the cover plate body is S1, satisfying the relationship: 0.18≤S / S1≤0.7. By controlling the size ratio of the electrode terminal to the cover plate body, the solderable area of ​​the cover plate assembly's electrical lead-out position can be increased, helping to improve the battery's current carrying capacity.

[0010] According to one embodiment, the length of the first connecting portion of the electrode terminal is L, and the length of the cover plate body is L1, satisfying the relationship: 0.2≤L / L1≤0.93. By limiting the length ratio of the first connecting portion of the electrode terminal and the cover plate body, the current transmission path is optimized, enabling the current to be conducted more efficiently and uniformly between the electrode terminal and the cover plate body, reducing resistance loss, and thus improving the charging and discharging efficiency of the battery system.

[0011] According to one embodiment, the width of the first connecting portion of the electrode terminal is W, and the width of the cover plate body is W1, satisfying the relationship: 0.44≤W / W1≤0.85. By limiting the width ratio of the first connecting portion of the electrode terminal and the cover plate body, a suitable contact area and connection strength between the electrode terminal and the cover plate body are ensured, which can significantly improve the uniformity and efficiency of current conduction.

[0012] According to one embodiment, the battery cover assembly further includes a first insulating member. The first insulating member has a first through hole, through which the electrode terminal passes and connects to the electrode core. The first insulating member is located between the electrode terminal and the cover body, serving to electrically isolate the electrode terminal from the cover body. By providing the first insulating member, the risk of short circuits caused by accidental contact between the electrode terminal and the cover body is prevented. Simultaneously, stable electrical isolation ensures that current can be efficiently transmitted between the electrode terminal and the electrode core along a predetermined path.

[0013] According to one embodiment, the edge of the first connecting portion of the electrode terminal is provided with a sub-connecting portion, which is used to connect with the first insulating member. By providing the sub-connecting portion, the stress distribution at the connection point between the electrode terminal and the first insulating member can be better dispersed, stress concentration can be avoided, and damage or deformation of the component due to excessive local stress can be prevented. At the same time, the sealing performance of the cover plate structure is also enhanced.

[0014] According to one embodiment, the battery cover assembly further includes a second insulating member located on the side of the cover body facing the electrode core, for electrically isolating the cover body and the electrode core. The second insulating member has a second through hole through which the electrode terminal passes. By providing the second insulating member, electrical isolation is achieved, ensuring the independence and stability of the electrochemical reaction inside the electrode core.

[0015] According to one embodiment, the cover plate body has a recess around the through hole, the recess being used to at least partially accommodate the first insulating member and / or the second insulating member. By providing the recess, the insulating member is effectively positioned and fixed, thereby simplifying the assembly process of the battery cover plate assembly.

[0016] According to one embodiment, the second insulating member is provided with a fixing portion, and the second insulating member is fixedly connected to the recessed portion of the cover plate body through the fixing portion. The cooperation between the fixing portion and the recessed portion simplifies the assembly process of the battery cover plate assembly, and the stable fixed connection helps to protect the integrity and performance stability of the second insulating member.

[0017] According to one embodiment, the fixing part is a snap-fit, which has a body and a flange. The body and the flange form a mating space, and the height of the mating space in the direction of the second insulating member toward the cover plate body is greater than or equal to the thickness of the recess. By setting the snap-fit ​​structure, the fixing process between the second insulating member and the cover plate body is greatly simplified. The mating space formed by the body and the flange of the snap-fit ​​can tightly wrap the recess, ensuring a stable connection between the second insulating member and the cover plate body.

[0018] According to one embodiment, the first connecting portion of the electrode terminal has a relief groove extending horizontally to the edge of the first connecting portion. By providing the relief groove, the local thickness of the metal part at the welding position is reduced, the stress on the insulating part caused by thermal expansion during brazing is reduced, the risk of cracking of the insulating part is reduced, and the brazing yield is improved.

[0019] According to one embodiment, the width of the relief groove is W2, satisfying the relationship: 1 / 5 < W2 / W < 4 / 5. By further limiting the ratio of the width W2 of the relief groove to the width W of the cover plate body, the structural strength of the first connection part of the electrode terminal can be improved, and the brazing yield can be significantly improved.

[0020] According to one embodiment, the distance between two adjacent clearance slots is L2, satisfying the relationship: (1 / 4)L1 < L2 < (3 / 4)L1. By limiting the ratio of L2 to L1, heat can be conducted and diffused more evenly and efficiently on the cover plate body, avoiding local overheating and improving battery stability.

[0021] According to one embodiment, the depth of the relief groove is D, and the thickness of the sub-connector is D1, satisfying the relationship: (1 / 3)D1≤D≤(4 / 5)D1. By limiting the ratio of the relief groove depth to the sub-connector thickness, the first insulating member can better wrap and isolate the electrode terminal, effectively preventing current leakage to surrounding components and ensuring that the current can be efficiently transmitted between the electrode terminal and other components inside the battery along a predetermined path.

[0022] According to one embodiment, the second connecting portion is used to connect to the electrode core, including direct connection between the second connecting portion and the electrode core, or indirect connection between the second connecting portion and the electrode core. Direct connection between the second connecting portion and the electrode core improves current conduction efficiency, making the overall structure more compact and stable. When the second connecting portion is directly connected to the electrode core, it protects both the electrode core and the second connecting portion from excessive stress, providing greater design flexibility.

[0023] A battery according to an embodiment of the present invention includes: a housing forming an opening in a receiving cavity; an electrode core disposed in the receiving cavity and having an electrode tab; and a cover plate assembly, which is the aforementioned electrode post assembly, disposed at the opening to close the housing, wherein the electrode terminals of the cover plate assembly are connected to the electrode core.

[0024] According to the battery of the present invention, by adopting the aforementioned cover plate assembly, the structure of the electrical lead-out is simplified and the electrical lead-out path is shortened, thereby improving the working performance of the battery.

[0025] The battery assembly according to an embodiment of the present invention is characterized in that it includes a plurality of the aforementioned batteries.

[0026] According to the battery assembly of the present invention, by using the aforementioned battery, the working performance of the battery assembly is improved.

[0027] The electrical equipment according to an embodiment of the present utility model is characterized in that it includes the aforementioned battery assembly.

[0028] According to the embodiments of the present invention, the electrical equipment improves its working performance by employing the aforementioned battery assembly.

[0029] Additional aspects and advantages of this invention will become apparent from the description which follows, or may be learned by practice of this invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the battery cover assembly provided in this application;

[0032] Figure 2 for Figure 1 Exploded view of one embodiment of the battery cover assembly;

[0033] Figure 3 for Figure 1 Cross-sectional view of the overall structure of the battery cover assembly;

[0034] Figure 4 for Figure 2 Schematic diagram of the middle electrode terminal;

[0035] Figure 5 for Figure 2 A schematic diagram of the structure of the first insulating component;

[0036] Figure 6 for Figure 2 Schematic diagram of the structure of the middle cover plate body;

[0037] Figure 7 for Figure 2 Schematic diagram of the structure of the second insulating component;

[0038] Figure 8 for Figure 3 Enlarged view of the snap-fit ​​structure of the first insulating component, the cover plate body and the second insulating component;

[0039] Figure 9 for Figure 1 Top view of one embodiment of the battery cover assembly;

[0040] Figure 10 for Figure 1 A top view of another embodiment of the battery cover assembly;

[0041] Figure 11 for Figure 1 A schematic diagram of a core structure matched with the battery cover assembly;

[0042] Figure 12 for Figure 11 A top view of a type of pole core structure;

[0043] Figure 13 To accommodate Figure 11 A schematic diagram of a battery cell casing structure with a core-pole structure;

[0044] Figure 14 For inclusion Figure 1 A schematic diagram of a battery cell structure in a battery cover assembly;

[0045] Explanation of reference numerals in the attached figures:

[0046] 1000, battery cell;

[0047] 100. Electrode terminal; 110. First connecting part; 111. Second connecting part; 112. Sub-connecting part; 113. Relief groove; 114. Protrusion;

[0048] 200, First insulating component; 210, First through hole;

[0049] 300. Cover plate body; 310. Outer wall; 311. Mounting hole; 312. Injection hole; 313. Recess;

[0050] 400. Second insulating component; 410. Fixing part; 411. Second through hole; 412. Body part; 413. Flanged part;

[0051] 500, pole core; 510, pole core lead-out terminal;

[0052] 600. Shell. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without making creative changes are within the scope of protection of this application.

[0054] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0056] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0057] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the description and drawings therein are for illustrative purposes only and not intended to limit this utility model.

[0058] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form part of the present invention, and which illustrate by way of example various exemplary structures, systems, and steps that can implement multiple aspects of the present invention. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the present invention. Furthermore, although the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of the present invention, these terms are used herein only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present invention.

[0059] See Figure 1 The illustration shows a three-dimensional structural diagram of the battery cover assembly proposed in this utility model. In this exemplary embodiment, the battery cover assembly proposed in this utility model is described using an application to an automotive battery as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this utility model to other types of battery devices, and these changes are still within the scope of the principles of the battery cover assembly proposed in this utility model.

[0060] like Figures 1 to 3 As shown, in one embodiment of this utility model, the battery cover assembly includes electrode terminals 100 and a cover body 300. The cover body 300 has a mounting hole 311 that penetrates the cover body 300. The electrode terminals 100 pass through the mounting hole 311. The electrode terminals 100 include a first connecting portion 110 and a second connecting portion 111. The first connecting portion 110 is used for electrical connection with a busbar, and the second connecting portion 111 is used for connection with an electrode core. Through the above design, this utility model can simplify the number of structural components in the cover assembly, save the height space of the battery cell, and improve the battery capacity density.

[0061] Specifically, in existing designs, the electrode core 500 is welded to the adapter plate, which occupies a significant amount of space, resulting in low space utilization of the cell 1000 and consequently low battery capacity density. In contrast, in this invention, the two ends of the electrode terminal 100 are directly connected to the electrode core 500 and the busbar, eliminating the need for the adapter plate structure in existing designs and improving the space utilization of the cell 1000. The cover plate body 300 can be made of insulating or insulating materials, such as engineering plastics or composite materials, to ensure that it provides structural fixation and support for the electrode terminal 100 without causing electrical short circuits or other safety hazards. A mounting hole 311 penetrating through its thickness direction is provided on the cover plate body 300. The shape and size of the mounting hole 311 can be precisely designed and processed according to the shape, size, and installation method of the electrode terminal 100. The electrode terminal 100 can be made of a highly conductive copper-based alloy or aluminum-based alloy. The first connecting portion 110 of the electrode terminal 100 is used for electrical connection to the busbar. To improve the stability and conductivity of the connection, the surface of the first connecting portion 110 may be electroplated, coated, or otherwise surface-treated. To ensure installation efficiency and reliability during actual assembly, the second connecting portion 111 can be designed with a guiding or positioning structure, or be compatible with specific connection processes (such as ultrasonic welding, laser welding, or spot welding).

[0062] like Figure 4 As shown, in one embodiment of this utility model, the area of ​​the first connecting portion 110 of the electrode terminal 100 is S, and the area of ​​the cover plate body 300 is S1, satisfying the relationship: 0.18≤S / S1≤0.7. Through the above design, this utility model can significantly increase the area of ​​the first connecting portion 110 of the electrode terminal, thereby improving the current carrying capacity of the battery and realizing rapid charging and discharging of the battery.

[0063] Specifically, the first connection portion 110 of the electrode terminal 100 plays a crucial conductive role. By limiting the ratio of the area S of the first connection portion 110 of the electrode terminal 100 to the area S1 of the cover plate body to the range of 0.18 to 0.7, the area of ​​the first connection portion 110 can be effectively expanded, thereby improving the charging and discharging efficiency. On the other hand, it will not occupy too much space of the cover plate body, thus avoiding affecting the layout and normal operation of other components inside the battery, reducing costs, and ensuring the overall structural strength and stability of the battery.

[0064] like Figure 4As shown, in one embodiment of this utility model, the length of the first connecting portion 110 of the electrode terminal 100 is L, and the length of the cover plate body 300 is L1, satisfying the relationship: 0.2≤L / L1≤0.93. By limiting the length ratio of the first connecting portion 110 of the electrode terminal 100 to the cover plate body 300, the proportional relationship between the area of ​​the electrode terminal 100 and the area of ​​the cover plate body 300 can be ensured, optimizing the current transmission path and enabling the current to be conducted more efficiently and uniformly between the electrode terminal and the cover plate body, reducing resistance loss, and thus improving the charging and discharging efficiency of the battery system.

[0065] like Figure 4 As shown, in one embodiment of this utility model, the width of the first connecting portion 110 of the electrode terminal 100 is W, and the width of the cover plate body 300 is W1, satisfying the relationship: 0.44≤W / W1≤0.85. By limiting the width ratio of the first connecting portion 110 of the electrode terminal 100 to the cover plate body 300, the proportional relationship between the area of ​​the electrode terminal 100 and the area of ​​the cover plate body 300 can be ensured, thereby providing a larger channel and contact area for current transmission, thus improving the current carrying capacity of the battery and helping to achieve rapid charging and discharging of the battery.

[0066] Specifically, in the specific embodiments of this utility model, the shape of the first connecting portion 110 of the electrode terminal 100 is not limited. It can be a regular polygon, a circle, an ellipse, or an irregular shape, which can be varied according to different application scenarios, as long as the length and width of its shortest straight segment region meet the aforementioned relationship requirements, thereby maximizing the area of ​​the first connecting portion 110 of the electrode terminal 100, and thus improving the current carrying capacity of the battery. In this embodiment, a regular rectangle is selected. Correspondingly, the shape of the cover plate body 300 and the mounting hole 311 penetrating its thickness direction are also set to rectangle, so that the electrode terminal 100 can be inserted along the direction of the cell 1000.

[0067] like Figure 5 As shown, in one embodiment of this utility model, the battery cover assembly further includes a first insulating member 200. The first insulating member 200 has a first through hole 210, through which the electrode terminal 100 passes and connects to the electrode core 500. The first insulating member 200 is located between the electrode terminal 100 and the cover body 300, and is used to electrically isolate the electrode terminal 100 and the cover body 300. By providing the first insulating member 200, the risk of short circuit caused by accidental contact between the electrode terminal 100 and the cover body 300 is prevented. At the same time, stable electrical isolation ensures that the current can be efficiently transmitted between the electrode terminal 100 and the electrode core 500 according to a predetermined path.

[0068] Specifically, in one embodiment of this utility model, based on the design that the electrode terminal 100 is to pass through the first insulating member 200, the first insulating member 200 needs to have a first through hole 210. There are no restrictions on the shape of the first through hole 210, but it is required that the shape of the first through hole 210 is the same as that of the second connecting portion 111 of the electrode terminal 100, and slightly larger than the second connecting portion 111 of the electrode terminal 100, to facilitate installation. Accordingly, the electrode terminal 100 is at least partially accommodated in the first through hole 210, and the second connecting portion 111 of the electrode terminal 100 extends along the direction of the cell 1000. This design is beneficial for improving the battery's capacity density, optimizing the battery's fast charge and discharge performance, and enhancing safety.

[0069] like Figure 4 As shown, in one embodiment of this utility model, a sub-connecting portion 112 is provided on the edge of the first connecting portion 110 of the electrode terminal 100. The sub-connecting portion 112 is used to connect with the first insulating member 200. By providing the sub-connecting portion 112, the stress distribution at the connection between the electrode terminal 100 and the first insulating member 200 can be better dispersed, stress concentration can be avoided, and damage or deformation of the component due to excessive local stress can be prevented. At the same time, the sealing performance of the cover plate structure is also enhanced. In some embodiments of this utility model, the sub-connecting portion 112 overlaps the first insulating member 200 and is connected to the first insulating member 200 by brazing. The sub-connecting portion 112 is located around the first connecting portion 110 to avoid component breakage or deformation failure caused by excessive local stress generated during brazing.

[0070] Specifically, the sub-connector 112 may be an appendage structure on the edge of the first connector 110, extending from the edge of the first connector 110. In some embodiments, the first connector 110 is rectangular, and the sub-connector 112 is located at the edge of the rectangle, and is a small protruding shape along the edge.

[0071] like Figure 6 As shown, in some other embodiments, the cover plate body 300 also includes a through-hole 312, which is offset from the clearance groove 113. This design optimizes the position of the injection hole 312, avoids overlap between the injection hole 312 and the clearance groove 113, ensures the smooth progress of the injection process, and does not affect the connection performance of the electrode terminals.

[0072] Specifically, the injection hole 312 is a small hole penetrating the cover plate body 300 and the second insulating component 400, used to inject electrolyte into the cell assembly 1000. By staggering the injection hole 312 with the clearance groove 113, the liquid can be evenly distributed inside the battery, reducing unevenness during the injection process. Especially in mass production, a reasonable staggered design helps improve production efficiency and reduce quality problems caused by liquid leakage or improper injection. The position design of the injection hole 312 needs to take into account the overall structure of the battery cover plate body 300. The staggered setting ensures smooth liquid flow and avoids liquid conflict with other components. At the same time, the staggered design helps improve the mechanical strength of the battery and avoids weak areas caused by excessive concentration of liquid injection holes.

[0073] like Figure 7 As shown, in one embodiment of this utility model, the battery cover assembly further includes a second insulating member 400. The second insulating member 400 is located on the side of the cover body 300 facing the electrode core 500, and is used to electrically isolate the cover body 300 and the electrode core 500. The second insulating member 400 is provided with a second through hole 411, through which the electrode terminal 100 passes. By providing the second insulating member, electrical isolation is achieved, ensuring the independence and stability of the electrochemical reaction inside the electrode core.

[0074] Specifically, the material of the second insulating component 400 should possess good electrical insulation, high-temperature resistance, and mechanical strength, such as polyimide (PI), epoxy resin, polytetrafluoroethylene (PTFE), and ceramic-based insulating materials. Plastic materials include PP, PPS, and PPO. The second insulating component 400 has a second through-hole 411 through which the electrode terminal 100 passes, ensuring a stable electrical connection between the electrode terminal 100 and the electrode core 500, while preventing current conduction through the second insulating component 400 to the outside. A sealing ring can also be designed around the second through-hole 411 to further prevent electrolyte or other impurities from penetrating into the battery.

[0075] The second insulating element 400 can be fixed to the cover plate body 300 in the following ways:

[0076] Embedded installation: The second insulating component 400 is embedded in the groove reserved in the cover plate body 300 to ensure its stable position.

[0077] Adhesive bonding: High-temperature resistant insulating adhesive is used to bond the first insulating component 400 to the cover plate body 300 together, providing greater stability.

[0078] Mechanical snap-fit: The second insulating component 400 is snapped onto the cover plate body 300 by a mechanical snap-fit ​​structure, which facilitates installation and disassembly.

[0079] like Figure 6 and Figure 7 As shown, in one embodiment of this utility model, the cover plate body 300 is provided with a recess 313 around the mounting hole 311. The recess 313 is used to at least partially accommodate the first insulating member 200 and / or the second insulating member 400. This design not only enhances the stability of the insulating members, but also effectively improves the overall safety and durability of the battery cover plate assembly.

[0080] Specifically, the recess 313 provides a dedicated space to accommodate the first insulator 200 and / or the second insulator 400, ensuring the insulators remain stable and do not shift within the battery cover assembly. This effectively reduces the risk of insulators loosening or detaching during prolonged use or under vibration. Simultaneously, the recess effectively increases the contact area between the first and second insulators 200 and 400 and the cover body 300, reducing the possibility of arcing and improving electrical isolation. Using the outer surface of the cover body 300 without the recess 313 as a reference plane, the depth of the recess 313 refers to the distance from the reference plane to the lowest point inside the recess 313 along a direction perpendicular to this reference plane. This direction is from the outside of the cover body inwards, i.e., towards the direction that can accommodate the first insulator 200 and / or the second insulator 400. The depth of the recess 313 is designed according to the dimensions of the first and second insulators 200 and 400 to ensure that both can be fully or partially embedded within it. The design must also take into account the tolerance range during installation in order to avoid assembly difficulties due to dimensional errors.

[0081] like Figure 7 As shown, in one embodiment of this utility model, the second insulating member 400 is provided with a fixing part 410, which is fixedly connected to the recessed part 313 of the cover plate body 300. The cooperation between the fixing part and the recessed part simplifies the assembly process of the battery cover plate assembly, and the stable fixed connection helps to protect the integrity and performance stability of the second insulating member.

[0082] Specifically, the fixing part 410 is fixedly connected to the recessed part 313 of the cover plate body 300. The connection method can be overlapping, snap-fit, tenon joint, or pin connection, etc. For example, a pin can be provided on the second insulating member 400, and a structure that cooperates with the pin can be provided on the cover plate body 300 to achieve a fixed connection between the two through the pin; or a tenon and mortise joint can be used to achieve the connection effect. There are no specific restrictions on the connection method, as long as it can firmly fix the second insulating member 400 and the cover plate body 300.

[0083] like Figure 7 and Figure 8As shown, in one embodiment of this utility model, the second insulating member 400 is connected to the cover plate body 300 by a snap-fit ​​connection, and the fixing part 410 is a buckle. The buckle has a body part 412 and a flange part 413, which together form a mating space. This mating space design allows the second insulating member 400 to be firmly connected to the cover plate body 300. In particular, the height of the mating space in the direction of the second insulating member 400 toward the cover plate body 300 is less than or equal to the thickness of the recess 313. This design further enhances the fit between the buckle 410 and the recess 313, improving the stability and safety of the assembly.

[0084] Specifically, the main body 412, as the primary load-bearing component of the latch, is responsible for securing the second insulating member 400 to the cover body 300. The flange 413 reinforces the fixation; its design allows the latch 410 to generate a stronger clamping force during installation, ensuring that the second insulating member 400 does not loosen during battery operation. The mating space formed by the main body 412 and the flange 413 not only secures the second insulating member 400 but also ensures the accuracy of its installation position.

[0085] like Figure 9 and Figure 10 As shown, in one embodiment of this utility model, the first connecting portion 110 of the electrode terminal 100 is provided with a relief groove 113, which extends horizontally to the edge of the first connecting portion 110. By providing the relief groove 113, the local thickness of the metal part at the welding position is reduced, the stress generated by the thermal expansion of the material during brazing is reduced, the risk of cracking of the insulation part is reduced, and the brazing yield is improved.

[0086] Specifically, in some embodiments, since the sub-connector 112 is disposed at the edge of the first connector 110, and the clearance groove 113 extends horizontally to the edge of the first connector 110, that is, the clearance groove 113 also extends horizontally to the edge of the sub-connector 113. Furthermore, the design of the clearance groove 113 reduces the contact area during connection by changing the geometry of the first connector 110, thereby reducing resistance and making the connection between the electrode terminal 100 and the busbar more efficient, thus improving the overall performance of the battery.

[0087] like Figure 9 and Figure 10 As shown, in one embodiment of this utility model, the width of the relief groove 113 is W2, satisfying the relationship: 1 / 5 < W2 / W < 4 / 5. By further limiting the ratio of the width W2 of the relief groove 113 to the width W of the cover plate body 300, the structural strength of the first connection part of the electrode terminal can be improved, and the brazing yield can be significantly improved.

[0088] Specifically, during brazing, the material expands and extends due to heat. By limiting the ratio of the width W2 of the relief groove 113 to the width W of the cover plate body 300, the stress generated by this expansion and extension on the first insulating component 200 can be reduced, thereby reducing the occurrence of cracking of the first insulating component 200 and significantly improving the brazing yield. If the width W2 of the relief groove 113 is too small relative to the width W of the electrode terminal 100, the space provided by the relief groove 113 will be very limited when the metal material expands due to heat, thus restricting the flow of the filling material and reducing the brazing yield. If the width W2 of the relief groove 113 is too large, it will weaken the structural strength of the first connection portion 110 of the electrode terminal 100, making it prone to deformation under external force or normal electrical working environment.

[0089] like Figure 9 and Figure 10 As shown, in one embodiment of this utility model, the distance between two adjacent clearance grooves 113 is L2, which refers to the distance between the centers of the two adjacent clearance grooves. The length of the cover plate body 300 is L1, satisfying the relationship: (1 / 4)L1 < L2 < (3 / 4)L1. By limiting the ratio of L2 to L1, heat can be conducted and diffused more evenly and efficiently on the cover plate body, avoiding local overheating and current loss or unstable contact caused by poor connection, thus improving the stability of the battery.

[0090] Specifically, if the distance L2 between adjacent clearance slots 113 is too small (i.e., L2 is less than (3 / 4)L1), the heat conduction paths on the cover plate body will be too dense and concentrated, easily leading to local overheating. If L2 is too large (i.e., L2 is greater than 4 / 3L1), the distance between adjacent clearance slots will be too far, and the heat conduction paths on the cover plate body will become sparse. This will significantly reduce the heat diffusion efficiency on the cover plate body, making it impossible to form an effective heat conduction network. This will result in large temperature differences between different parts of the battery during operation, deteriorating overall thermal stability and consequently affecting the battery's performance consistency and lifespan.

[0091] like Figure 4 and Figure 10 As shown, in one embodiment of this utility model, the depth of the clearance groove 114 is D, and the thickness of the sub-connector 112 is D1, satisfying the relationship: (1 / 3)D1≤D≤(4 / 5)D1. By limiting the ratio of the depth D of the clearance groove 114 to the thickness D1 of the sub-connector 112, the first insulating member 200 can better wrap and isolate the electrode terminal 100, effectively preventing current leakage to surrounding components and ensuring that the current can be efficiently transmitted between the electrode terminal 100 and other components inside the battery along a predetermined path.

[0092] Specifically, the reference direction is the relative position of the electrode terminal 100 and the first insulating member 200 (i.e., the direction from the electrode terminal 100 to the first insulating member 200). The depth D of the relief groove 113 refers to the distance measured perpendicularly from the surface of the portion of the electrode terminal 100 without the relief groove (the surface adjacent to and outside the relief groove 113) along the aforementioned reference direction to the lowest point inside the relief groove 113. The relief groove 113 reduces the resistance when current flows by reducing the contact area between the electrode terminal 100 and other connecting components. The thickness D1 of the sub-connection portion 112 refers to the distance from one surface of the sub-connection portion 112 to the other surface along a direction perpendicular to the sub-connection portion 112. The thickness D1 of the sub-connection portion 112 plays a crucial role in ensuring the quality of the brazing, conductivity, and the overall mechanical strength of the electrode terminal.

[0093] like Figure 2 and Figure 4 As shown, in one embodiment of this utility model, the second connecting portion 111 of the electrode terminal 100 is used to connect to the electrode core 500, including direct connection of the second connecting portion 111 to the electrode core 500, or indirect connection of the second connecting portion 111 to the electrode core 500. Direct connection of the second connecting portion 111 to the electrode core 500 improves current conduction efficiency and makes the overall structure more compact and stable. When the second connecting portion 111 is directly connected to the electrode core 500, it protects the electrode core 500 and the second connecting portion 111 from excessive stress, while also providing greater design flexibility.

[0094] Specifically, the direct connection between the second connecting part 111 and the electrode core 500 means that the second connecting part 111 and the electrode core 500 are directly bonded and fixed in physical structure, without any intermediate components. This connection method can effectively shorten the current transmission path and greatly reduce the resistance value. In terms of mechanical structure, the direct connection avoids the space occupied by intermediate components, making the overall structure more compact. When the second connecting part 111 and the electrode core 500 are indirectly connected, it means that one or more intermediate connecting structures are added between them. When the temperature changes, the electrode core 500 and the second connecting part 111 have different degrees of thermal expansion and contraction due to the different materials, which can easily generate stress. The introduction of intermediate connecting structures can buffer these stresses to a certain extent, thereby protecting the electrode core 500 and the second connecting part 111 and extending their service life.

[0095] like Figures 11 to 14As shown, the battery according to an embodiment of the present invention includes: a housing 600 forming a receiving cavity with an opening; an electrode core 500 disposed in the receiving cavity and having electrode tabs; and a cover assembly, which is the aforementioned terminal post assembly, disposed at the opening to close the housing 600, and the electrode terminals 100 of the cover assembly are electrically connected to the electrode core 500. By employing the aforementioned cover assembly, the structure of the electrical lead-out is simplified and the electrical lead-out path is shortened, thereby improving the battery's operating performance.

[0096] like Figures 11 to 14 As shown, the battery assembly according to an embodiment of the present invention includes a plurality of the aforementioned batteries. By employing the aforementioned batteries, the working performance of the battery assembly is improved.

[0097] like Figures 1 to 14 As shown, the electrical device according to an embodiment of the present invention includes the aforementioned battery assembly. By employing the aforementioned battery assembly, the operating performance of the electrical device is improved.

[0098] It should be noted that the battery cover assembly shown in the accompanying drawings and described in this specification is merely a few examples among many battery cover assemblies capable of employing the principles of this invention. It should be clearly understood that the principles of this invention are by no means limited to any detail or component of the battery cover assembly shown in the accompanying drawings or described in this specification.

[0099] The foregoing has described and / or illustrated exemplary embodiments of the battery cover assembly, battery assembly, and electrical device proposed by this utility model in detail. However, the embodiments of this utility model are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "the above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising," "including," and "having" are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc. Furthermore, the terms "first" and "second," etc., in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the object.

[0100] Although the battery cover assembly, battery assembly, and electrical device proposed in this application have been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of this application within the spirit and scope of the claims. In the description of the embodiments reproduced in this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., refer to the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0101] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A battery cover assembly, characterized in that, The battery cover assembly includes electrode terminals and a cover body; The cover plate body is provided with mounting holes, which penetrate the cover plate body. An electrode terminal is inserted through the mounting hole. The electrode terminal includes a first connecting part and a second connecting part. The first connecting part is used for electrical connection with the busbar, and the second connecting part is used for connection with the electrode core.

2. The battery cover assembly as described in claim 1, characterized in that, The area of ​​the first connection portion of the electrode terminal is S, and the area of ​​the cover plate body is S1, satisfying the relationship: 0.18≤S / S1≤0.

7.

3. The battery cover assembly as described in claim 2, characterized in that, The length of the first connecting part of the electrode terminal is L, and the length of the cover plate body is L1, satisfying the relationship: 0.2≤L / L1≤0.

93.

4. The battery cover assembly as described in claim 2, characterized in that, The width of the first connecting portion of the electrode terminal is W, and the width of the cover plate body is W1, satisfying the relationship: 0.44≤W / W1≤0.

85.

5. The battery cover assembly as claimed in claim 1, characterized in that, The battery cover assembly further includes a first insulating member, which has a first through hole. The electrode terminal passes through the first through hole for connection with the electrode core. The first insulating member is located between the electrode terminal and the cover body for electrically isolating the electrode terminal and the cover body.

6. The battery cover assembly as described in claim 5, characterized in that, The first connecting portion of the electrode terminal has a sub-connecting portion at its edge, which is used to connect with the first insulating member.

7. The battery cover assembly as described in claim 5, characterized in that, The battery cover assembly further includes a second insulating member located on the side of the cover body facing the electrode core, for electrically isolating the cover body and the electrode core. The second insulating member has a second through hole through which the electrode terminal passes.

8. The battery cover assembly as described in claim 7, characterized in that, The cover plate body has a recess around the mounting hole, the recess being used to at least partially accommodate the first insulating element and / or the second insulating element.

9. The battery cover assembly as described in claim 8, characterized in that, The second insulating member is provided with a fixing part, and the second insulating member is fixedly connected to the recessed part of the cover plate body through the fixing part.

10. The battery cover assembly as claimed in claim 9, characterized in that, The fixing part is a buckle, which has a body part and a flange part. The body part and the flange part surround a mating space. The height of the mating space in the direction of the second insulating member toward the cover plate body is greater than or equal to the thickness of the recess.

11. The battery cover assembly as claimed in claim 10, characterized in that, The first connecting portion of the electrode terminal has a clearance groove, which extends horizontally to the edge of the first connecting portion.

12. The battery cover assembly as claimed in claim 11, characterized in that, The width of the clearance groove is W2, which satisfies the relationship: 1 / 5 < W2 / W < 4 / 5.

13. The battery cover assembly as claimed in claim 11, characterized in that, The distance between two adjacent clearance slots is L2, which satisfies the relationship: (1 / 4)L1<L2<(3 / 4)L1.

14. The battery cover assembly as claimed in claim 11, characterized in that, The depth of the clearance groove is D, and the thickness of the sub-connector is D1, satisfying the relationship: (1 / 3)D1≤D≤(4 / 5)D1.

15. The battery cover assembly as described in any one of claims 1-14, characterized in that, The second connecting part is used to connect with the pole core, including direct connection between the second connecting part and the pole core, or indirect connection between the second connecting part and the pole core.

16. A battery, characterized in that, include: A housing that forms a receiving cavity with an opening; An electrode core, wherein the electrode core is disposed in the receiving cavity and has an electrode tab; A cover assembly, wherein the cover assembly is a battery cover assembly as described in any one of claims 1-14, the cover assembly being disposed at the opening to close the housing, and the electrode terminals of the cover assembly being connected to the electrode core.

17. A battery assembly, characterized in that, Includes the battery as described in claim 15.

18. An electrical appliance, characterized in that, Includes the battery or battery assembly as described in claim 15 or 16.

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