Battery cover plate and battery

Abstract

Battery cover plate, including: a cover plate (1) wherein a pole column groove (11) and a press-fit flange edge (12) arranged around the pole column groove (11) are formed on the cover plate (1); a pole pillar component (2), wherein the pole pillar component (2) is arranged in the pole pillar groove (11), wherein the pressed flange edge (12) is formed to delimit the pole pillar component (2) in the pole pillar groove (11); and an insulating part (3), wherein the insulating part (3) is arranged around a circumference of the pole pillar component (2) and is arranged between the pole pillar component (2) and the pole pillar groove (11), and wherein the insulating part (3) is configured to insulate the pole pillar component (2) and the cover plate (1) from each other.

Description

TECHNICAL AREA

[0001] This application concerns the field of battery technology, such as a battery cover plate and a battery. STATE OF THE ART

[0002] Batteries are a widely used energy source in modern society. The battery cover plate is a crucial component, serving as a seal, providing thermal protection and a safety valve, while also acting as the conductive connection for the positive or negative terminal. In current technology, a crimped design is used for the battery cover plate section, offering advantages such as simple construction and low cost. However, directly crimping the cover plate creates a very small gap between the terminal column and the crimped area, which can easily lead to a high-voltage fault and a short circuit within the battery. CONTENT OF THE PRESENT APPLICATION

[0003] The present application provides a battery cover plate in which the pole column component and the cover plate are insulated from each other by an insulating element in order to avoid high voltage faults or short circuits that could be caused by contact between the pole column component and the cover plate.

[0004] The present application offers a battery with good insulating properties that prevents short circuits and improves the battery's safety performance.

[0005] A battery cover plate according to an embodiment of this application comprises: a cover plate, wherein a pole column groove and a crimped edge arranged around the pole column groove are formed on the cover plate; a pole column component, wherein the pole column component is arranged in the pole column groove, wherein the crimped edge is formed to delimit the pole column component in the pole column groove; an insulating part, wherein the insulating part is arranged around a circumference of the pole column component and is arranged between the pole column component and the pole column groove, and wherein the insulating part is formed to insulate the pole column component and the cover plate from each other.

[0006] In one embodiment, the insulating part encloses the crimped edge on the outside.

[0007] In one embodiment, the pole pillar component comprises a pole pillar main body and a pole pillar projection ring, wherein the pole pillar projection ring is arranged around a circumference of the pole pillar main body, wherein the pole pillar main body is connected to the pole pillar projection ring, wherein the insulating part is attached externally to an outer circumference of the pole pillar projection ring, and wherein the insulating part rests against an inner side wall of the pole pillar groove and against the crimped edge.

[0008] In one embodiment, the crimped edge protrudes above the pole column projection ring in order to limit upward movement of the pole column component.

[0009] In one embodiment, the insulating part is a one-piece molded structure.

[0010] In one embodiment, the battery cover plate further comprises a sealing element, wherein the sealing element is passed through the pole column groove, with one end of the sealing element bearing against the pole column component, and wherein another end of the sealing element bearing against a groove base of the pole column groove to seal a gap between the pole column component and the groove base of the pole column groove.

[0011] In one embodiment, the sealing element comprises a planar section and an insertable section which are connected to each other, wherein the insertable section is passed through the pole column groove, wherein a first end of the planar section rests against the groove base of the pole column groove, and wherein a second end of the planar section rests against the pole column component.

[0012] In one embodiment, the sealing element is designed as an annular structure, wherein the first end of the planar section has a press groove arranged around an outer circumference of the insertion section, and wherein the groove base of the pole column groove has a press projection ring designed to project into the press groove.

[0013] In one embodiment, the battery cover plate further comprises an insulating housing, wherein the insulating housing is connected to a side of the cover plate facing away from the pole column groove.

[0014] According to one embodiment of the present application, a battery comprises a battery cell, a battery housing and the battery cover plate, wherein the battery cell is arranged in the battery housing and a terminal tab of the battery cell is electrically connected to the terminal column component. BRIEF DESCRIPTION OF THE DRAWING

[0015] The present application is described in more detail below with reference to the attached figures and examples of embodiments. Fig. Figure 1 is the axonometric view of the battery cover plate. Fig. Figure 2 is a partially schematic representation of the battery cover plate. Fig. Figure 3 is a partially schematic representation of the battery cover plate in the first step of the assembly process. Fig. Figure 4 is a partially schematic representation of the battery cover plate in the second step of the assembly process. Reference symbol list:

[0016] 1. Cover plate; 2. Pole column component; 3. Insulating part; 4. Sealing element; 5. Insulating housing; 11. Pole column groove; 12. Press-fit flange edge; 13. Press-fit protrusion ring; 21. Pole column main body; 22. Pole column protrusion ring; 41. Flat section; 42. Insertion section; 43. Press-fit groove; 31. Insulating protrusion ring. DETAILED DESCRIPTION

[0017] The technical solution of the embodiment of this application is described below in conjunction with the accompanying drawings. It is understood that the described embodiments represent only a portion of the embodiments of this application and not all embodiments. Based on the embodiments described in this application, all further embodiments that skilled persons in their field can derive without inventive step fall within the scope of protection of this application.

[0018] In the description of this application, unless expressly specified and defined otherwise, the terms "connected", "attached", and "fastened" are to be understood broadly. For example, they may refer to a fixed connection, a detachable connection, or a one-piece design; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection via an intermediate medium; and they may refer to the internal continuity of two elements or to the interaction between two elements. The meaning of the above terms in this application may be understood by a person skilled in the art depending on the context.

[0019] In this application, unless expressly stated or defined otherwise, the terms "above" or "below" a first feature mean that the first and second features may be in direct contact or not in direct contact, but interact via other features between them. Furthermore, the terms "on," "above," and "above" include a first feature being vertically above or diagonally above a second feature, or simply indicating that the vertical height of the first feature is greater than that of the second feature. Similarly, the terms "below," "below," and "underneath" include a first feature being vertically below or diagonally below a second feature, or simply indicating that the vertical height of the first feature is lower than that of the second feature.

[0020] In the description of this work, it should be noted that the terms "top," "bottom," "left," "right," and other directional or positional relationships are based on the directions or positions depicted in the accompanying figures. They serve only to simplify the description and operation and do not indicate or imply that the described devices or components must have a specific orientation, be constructed, or be operated in a particular way. Therefore, they are not to be understood as a limitation of this application. Furthermore, the terms "first" and "second" are used only for better differentiation of the description and have no special meaning.

[0021] In this manual, references to terms such as "an embodiment," "an example," etc., refer to features, structures, materials, or properties described in at least one embodiment or example of this application. In this specification, the exemplary description of the above terms does not necessarily refer to the same embodiments or examples.

[0022] The technical concept of this application is explained below with reference to the attached drawings and specific embodiments.

[0023] According to the present application, a battery is provided comprising a battery cell, a battery housing, and a battery cover plate, wherein the battery cell is arranged in the battery housing and a terminal tab of the battery cell is electrically connected to the battery cover plate. As in Fig. As shown in Figure 1, the battery cover plate comprises the terminal column component 2, with the terminal tab of the battery cell being electrically connected to the terminal column component 2. The battery cover plate serves to seal the battery, provides temperature protection for the battery, and simultaneously acts as a positive or negative conductive connection via the terminal column component 2.

[0024] As in Fig. As shown in Figure 2, the battery cover plate further comprises a cover plate 1 and an insulating part 3, wherein a pole column groove 11 and a crimped flange 12 arranged around the pole column groove 11 are formed on the cover plate 1; wherein the pole column component 2 is arranged in the pole column groove 11, and wherein the crimped flange 12 is formed to delimit the pole column component 2 in the pole column groove 11. For example, the pole column component 2 comprises a pole column main body 21 and a pole column projection ring 22, wherein the pole column projection ring 22 is arranged around a circumference of the pole column main body 21, wherein the pole column main body 21 and the pole column projection ring 22 form a single-piece structure, and wherein a base of the pole column main body 21 can abut a terminal tab of a battery cell to establish an electrical connection with the battery cell.The crimped edge 12 extends above the pole column projection ring 22 to hold the pole column projection ring 22 in the pole column groove 11 and thus limit the axial movement of the pole column component 2. The structure of the crimped edge 12 allows the position of the pole column component 2 to be limited simply and effectively; the structure is simple and the manufacturing costs are low.

[0025] As in the Fig. As shown in Figures 1 to 2, to prevent the pole component 2 from contacting the cover plate 1 and thereby causing high-voltage faults or short circuits, the battery cover plate further comprises an insulating element 3, wherein the insulating element 3 is arranged around the circumference of the pole component 2 and between the pole component 2 and the pole component groove 11, and wherein the insulating element 3 is configured to insulate the pole component 2 and the cover plate 1 from each other. By way of example, the insulating element 3 is fitted onto the circumference of the protruding ring of the pole component 2, and the insulating element 3 rests against the inner side wall of the pole component groove 11 and the crimped edge 12. The insulating element 3 completely insulates the pole component 2 from the cover plate 1 and thus prevents short circuits or high-voltage faults caused by contact between the pole component 2 and the cover plate 1.At the same time, the insulating part 3 encloses the crimped edge 12 to prevent contact between the cover plate 1 and the battery housing and / or the terminal tab, which could cause short circuits or high-voltage faults.

[0026] According to the present application, a battery cover plate and a battery are provided, wherein the battery cover plate is electrically connected to a terminal of the battery, the battery cover plate comprises a cover sheet, a terminal column component, and an insulating element, and the terminal column component can be electrically connected to the terminal of the battery. A terminal column groove for receiving the terminal column component and a crimped edge arranged around the terminal column groove are formed on the cover sheet. The crimped edge holds the terminal column component in the terminal column groove to prevent its movement or detachment. The insulating element is arranged between the terminal column component and the terminal column groove. The two ends of the insulating element abut the terminal column component and the inner side wall of the terminal column groove, respectively, enabling the insulating element to completely insulate the terminal column component and the cover plate.This improves the insulating properties of the battery cover plate and prevents high-voltage faults or short circuits caused by contact between the terminal stack component and the cover plate. The structure is simple, manufacturing costs are low, and the improved insulation enhances the battery's safety and stability.

[0027] As in Fig. As shown in Figure 2, the battery cover plate further comprises a sealing element 4, wherein the sealing element 4 extends through the pole pillar groove 11, with one end of the sealing element 4 abutting the pole pillar component 2, and wherein another end of the sealing element 4 abuts a groove base of the pole pillar groove 11 to seal a gap between the pole pillar component 2 and the groove base of the pole pillar groove 11. The sealing element 4 comprises a flat section 41 and an insert section 42, which are connected to each other, wherein the insert section 42 extends through the pole pillar groove 11, with a first end of the flat section 41 abutting the groove base of the pole pillar groove 11, and wherein a second end of the flat section 41 abuts the pole pillar component 2. The sealing element 4 is made of insulating material.On the one hand, it provides protection to the pole column component 2 against water and dust, on the other hand, it insulates the pole column component 2 from the base of the pole column groove 11 in order to avoid high voltage faults or short circuits that could be caused by contact between the underside of the pole column component 2 and the base of the pole column groove 11.

[0028] For example, as in Fig. As shown in Figure 2, the sealing element 4 is designed as an annular structure, wherein the first end of the planar section 41 has a press groove 43 arranged around an outer circumference of the insertion section 42, and wherein the groove base of the pole column groove 11 has a press-fit protrusion ring 13 designed to project into the press groove 43. The insertion of the press groove 43 into the press-fit protrusion ring 13 serves, on the one hand, for assembly positioning and facilitates the assembly of the battery cover plate. On the other hand, the press-fit protrusion ring 13, which is inserted into the press groove 43, can limit the radial position of the sealing element 4 in the pole column groove 11, while the pole column component 2 fixes the axial position of the sealing element 4 in the pole column groove 11. This prevents the sealing element 4 from shifting or coming loose and thus leading to leakage or insulation failure.

[0029] For example, the sealing element 4 is made of elastic rubber so that the two ends of the sealing element 4 can each rest against the pole pillar groove 11 and the pole pillar component 2 in order to increase the sealing performance of the sealing element 4.

[0030] As in Fig. As shown in Figure 2, an additional insulating projection ring 31 is provided on the base of the insulating part 3, extending radially inwards. The base of the insulating projection ring 31 rests against the groove base of the pole column groove 11, and the upper surface of the insulating projection ring 31 rests against the pole column component 2. To prevent interference between the insulating projection ring 31 and the sealing element 4 during the assembly process, the inner diameter of the insulating projection ring 31 must not be smaller than the outer diameter of the sealing element 4, and the upper surface of the insulating projection ring 31 must not be higher than the upper surface of the sealing element 4. The insulating projection ring 31 serves both for axial positioning and can further improve the insulating properties of the battery cover plate.

[0031] For example, insulating part 3 can be made from insulating materials such as polypropylene.

[0032] As in Fig. As shown in Figure 2, the battery cover plate further comprises an insulating housing 5, wherein the insulating housing 5 is connected to a side of the cover plate 1 facing away from the pole column groove 11. This further improves the sealing and insulating performance of the battery cover plate, while simultaneously protecting the cover plate 1, reducing collision wear between the cover and the outside environment, and increasing the service life of the battery cover plate.

[0033] The battery cover plate is installed mainly in three steps: Step 1: As in Fig. As shown in Figure 3, the crimped flange 12 is arranged vertically. The sealing element 4 is inserted into the pole pillar groove 11 by the positioning fit between the crimped protrusion ring 13 and the crimp groove 43. The cylindrical insulating part 3 with insulating protrusion ring 31 is inserted into the pole pillar groove 11 along its inner side wall, with the base of the insulating protrusion ring 31 abutting the bottom of the pole pillar groove 11. The pole pillar component 2 is inserted into the pole pillar groove 11 along its inner side wall, with the base of the pole pillar component 2 abutting the top of the sealing element 4. Step 2: As in Fig. As shown in Figure 4, the crimped edge 12 is rolled and pressed inwards by a crimping machine, thereby bending the crimped edge 12 inwards and aligning it parallel to the pole pillar projection ring 22. This causes a simultaneous deformation of the insulating part 3, which fixes the sealing element 4, the insulating part 3 and the pole pillar component 2 in the pole pillar groove 11. Step 3: As in Fig. As shown in Figure 2, the insulating part 3 is attached to the outside of the crimped edge 12 by heat compression and fixed in a dimensionally stable manner.

[0034] Furthermore, the above-mentioned embodiments merely represent optional embodiments of this application and the technical principles employed therein. A person skilled in the art will understand that the present application is not limited to the specific embodiments described herein; numerous obvious variations, realignments, and substitutions are possible for a person skilled in the art without exceeding the scope of protection of the present application. Therefore, although the present application has been explained by the foregoing embodiments, the present application is not limited to these embodiments alone. Without departing from the concept of the present application, other equivalent embodiments may also be included, the scope of which is determined by the attached scope of the claims.

Claims

[1] Battery cover plate, comprising: a cover plate (1) wherein a pole column groove (11) and a press-fit flange edge (12) arranged around the pole column groove (11) are formed on the cover plate (1); a pole pillar component (2), wherein the pole pillar component (2) is arranged in the pole pillar groove (11), wherein the pressed flange edge (12) is formed to delimit the pole pillar component (2) in the pole pillar groove (11); and an insulating part (3), wherein the insulating part (3) is arranged around a circumference of the pole pillar component (2) and is arranged between the pole pillar component (2) and the pole pillar groove (11), and wherein the insulating part (3) is configured to insulate the pole pillar component (2) and the cover plate (1) from each other. [2] Battery cover plate according to claim 1, wherein the insulating part (3) outerly surrounds the crimped edge (12). [3] Battery cover plate according to claim 2, wherein the pole column component (2) comprises a pole column main body (21) and a pole column projection ring (22), wherein the pole column projection ring (22) is arranged around a circumference of the pole column main body (21), wherein the pole column main body (21) is connected to the pole column projection ring (22), wherein the insulating part (3) is attached externally to an outer circumference of the pole column projection ring (22), and wherein the insulating part (3) rests against an inner side wall of the pole column groove (11) and against the crimped edge (12). [4] Battery cover plate according to claim 3, wherein the crimped edge (12) extends above the pole column projection ring (22) to limit upward movement of the pole column component (2). [5] Battery cover plate according to claim 1, wherein the insulating part (3) has a one-piece formed structure. [6] Battery cover plate according to one of claims 1 to 5, further comprising a sealing element (4), wherein the sealing element (4) is passed through the pole column groove (11), wherein one end of the sealing element (4) rests against the pole column component (2), and wherein another end of the sealing element (4) rests against a groove base of the pole column groove (11) to seal a gap between the pole column component (2) and the groove base of the pole column groove (11). [7] Battery cover plate according to claim 6, wherein the sealing element (4) comprises a planar section (41) and an insertion section (42) which are connected to each other, wherein the insertion section (42) is passed through the pole column groove (11), wherein a first end of the planar section (41) rests against the groove base of the pole column groove (11), and wherein a second end of the planar section (41) rests against the pole column component (2). [8] Battery cover plate according to claim 7, wherein the sealing element (4) is designed as an annular structure, wherein the first end of the planar section (41) has a press groove (43) arranged around an outer circumference of the insertion section (42), and wherein the groove base of the pole column groove (11) has a press projection ring (13) designed to project into the press groove (43). [9] Battery cover plate according to one of claims 1 to 5, further comprising an insulating housing (5), wherein the insulating housing (5) is connected to a side of the cover plate (1) facing away from the pole column groove (11). [10] Battery comprising a battery cell, a battery housing and the battery cover plate according to any one of claims 1 to 9, wherein the battery cell is arranged in the battery housing and wherein a terminal tab of the battery cell is electrically connected to the terminal column component (2).

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