Battery cover plate structure and battery

Abstract

The present application relates to the technical field of batteries, and discloses a battery cover plate structure and a battery. The battery cover plate structure comprises: a cover plate body; a terminal having a body portion indirectly abutting the surface of a side of the cover plate body; and an insulator disposed between the cover plate body and the body portion, the insulator having a barrier portion spacing the cover plate body from the body portion, and a wrapping portion extending from the barrier portion toward the body portion and surrounding the outer periphery of the body portion, wherein in a plane parallel to the plane of the body portion, the wrapping portion extends toward the circumferential side surface of the body portion to form a plurality of limiting teeth, which are either in contact with or spaced apart from the circumferential side surface of the body portion. The battery cover plate structure provided in the present application can facilitate the assembly of the body portion and the insulator, preventing problems such as swaying of the terminal after assembly and thus contributing to the sealing performance of the battery cover plate structure; and can avoid interference fit between the body portion and the insulator caused by machining dimensional errors, eliminating assembly difficulties.

Description

Battery cover structure and battery

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on February 6, 2024, with application number 202420286805.6 and invention name “Battery Cover Structure and Battery”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery cover structure and a battery. Background Art

[0004] With the continuous development of the battery industry, lithium-ion batteries, due to their high energy density, are widely used in vehicles, mobile devices and other fields. Among them, the sealing effect and insulation performance of lithium-ion batteries directly affect their service life.

[0005] In related technologies, an insulating lower plastic is typically installed between the pole and the bare aluminum plate, creating a space to accommodate the pole. A large gap between the lower plastic and the pole can easily cause the pole to wobble or even twist after assembly. A tight interference fit between the pole and the lower plastic can complicate assembly and reduce efficiency. Summary of the Invention

[0006] In view of this, the present application provides a battery cover structure and a battery to solve the problem that when the plastic under the insulation and the pole are assembled, a large gap easily causes the pole to shake after assembly, and a tight interference fit easily makes assembly more difficult.

[0007] In a first aspect, the present application provides a battery cover structure, comprising:

[0008] Cover plate body;

[0009] The pole has a main body portion that is indirectly in contact with a side surface of the cover body;

[0010] an insulating member disposed between the cover body and the main body, the insulating member comprising a barrier portion for spacing the cover body from the main body, and a rim portion extending from the barrier portion toward one side of the main body and surrounding the outer periphery of the main body;

[0011] A plurality of limiting teeth are formed on the edging portion extending toward the circumferential side surface of the main body in a plane parallel to the main body, and the limiting teeth are in contact with or provided with a gap on the circumferential side surface of the main body.

[0012] Beneficial effect: The battery cover structure provided by the embodiment of the present application has a plurality of limiting teeth formed on the circumferential side of the edging portion extending toward the main body in a plane parallel to the main body, which can make the limiting teeth abut against the circumferential side of the main body, thereby facilitating the assembly of the main body and the insulating part, avoiding problems such as shaking of the pole after assembly, and thus helping to ensure the sealing performance of the battery cover structure; at the same time, by limiting the fit of the limiting teeth and the circumferential side of the main body or setting a gap, it can avoid interference assembly between the main body and the insulating part due to processing size errors, avoid assembly difficulties, and improve assembly efficiency.

[0013] In an optional embodiment, the distance between the limiting teeth and the circumferential side surface of the main body is L, where L satisfies: 0 mm ≤ L ≤ 0.1 mm.

[0014] Beneficial effect: By making the limiting teeth fit into or set a gap with the circumferential side surface of the main body, and further limiting the upper limit of the spacing L between the limiting teeth and the circumferential side surface of the main body, the shaking amplitude of the pole after assembly can be reduced as much as possible, and by limiting the lower limit of the spacing L between the limiting teeth and the circumferential side surface of the main body, interference fit between the main body and the insulating part due to processing size errors can be avoided, thereby avoiding assembly difficulties and improving assembly efficiency.

[0015] In an optional embodiment, limiting teeth are extended from opposite sides of the edging portion along the width direction of the cover plate body, and the limiting teeth on both sides are respectively arranged corresponding to the opposite side surfaces of the main body.

[0016] Beneficial effect: By extending the limiting teeth on both opposite sides of the edging portion, both opposite side surfaces of the main body portion can be limited by the limiting teeth, thereby avoiding problems such as shaking of the pole after assembly.

[0017] In an optional embodiment, along the width direction of the cover body, a local area of ​​the main body portion protrudes toward the edge portion to form a convex bulge;

[0018] An accommodating groove is formed between two adjacent limiting teeth along the length direction of the cover body;

[0019] The convex bump is snapped into the receiving groove.

[0020] Beneficial effect: By snapping the convex bump into between two adjacent limiting teeth along the length direction of the cover body, the convex bump is matched with the accommodating groove, thereby improving the positioning accuracy and avoiding the problem of shaking of the pole after assembly.

[0021] In an optional embodiment, the pole is extended from a side surface of the main body to form a protruding portion, the protruding portion at least partially passes through the cover body and is riveted to the connecting block to fix the pole to the cover body.

[0022] In an optional embodiment, the insulating member is provided with a through hole, and the passing portion passes through the through hole.

[0023] In an optional embodiment, the limiting teeth on both sides are symmetrically arranged relative to the center line of the insulating member along the length direction.

[0024] In an optional embodiment, along the width direction of the cover plate body, two opposite side surfaces of the main body portion are raised to form bulges.

[0025] Beneficial effect: By forming convex bulges on the two opposite side surfaces of the main body, the convex bulges on the two side surfaces of the main body can respectively cooperate with the accommodating grooves formed on the insulating member, thereby improving positioning accuracy and avoiding the problem of shaking of the pole after assembly.

[0026] In an optional embodiment, along the length direction of the cover plate body, the convex hull overlaps with the projection of the limiting tooth.

[0027] Beneficial Effect: By aligning the projections of the convex ridges with the projections of the limiting teeth along the length of the cover body, the limiting teeth block the convex ridges when the main body moves relative to the insulating member along the length of the cover body, thus limiting the position of the pole. This reduces displacement of the pole along the length of the cover body after assembly, ensuring accurate assembly position.

[0028] In a second aspect, the present application also provides a battery, comprising the battery cover structure as described above.

[0029] Because the battery includes a battery cover structure, it has the same effect as the battery cover structure and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] FIG1 is a schematic diagram of the battery cover structure of the present application;

[0032] FIG2 is a top view of the battery cover structure of the present application;

[0033] FIG3 is a schematic diagram of the AA section in FIG2 ;

[0034] FIG4 is a schematic diagram of an insulating member of the present application;

[0035] FIG5 is a partial enlarged view of FIG4;

[0036] FIG6 is a schematic diagram of a pole of the present application;

[0037] FIG7 is a schematic diagram of the assembled state of the insulating member and the pole of the present application.

[0038] Explanation of the accompanying drawings: 1. Cover plate body; 2. Connecting block; 3. Insulating member; 31. Through hole; 32. Limiting tooth; 33. Accommodating groove; 34. Blocking portion; 35. Edge portion; 4. Pole; 41. Penetrating portion; 42. Main body; 43. Bump; 5. Sealing ring. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0040] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0043] The following describes an embodiment of the present application with reference to FIG. 1 to FIG. 7 .

[0044] According to an embodiment of the present application, on one hand, a battery cover structure is provided, comprising:

[0045] Cover plate body 1;

[0046] The pole 4 has a main body portion 42 that is indirectly in contact with a side surface of the cover body 1;

[0047] The insulating member 3 is disposed between the cover body 1 and the main body 42. The insulating member 3 includes a barrier portion 34 that separates the cover body 1 from the main body 42, and a rim portion 35 that extends from the barrier portion 34 toward one side of the main body 42 and surrounds the outer periphery of the main body 42.

[0048] In a plane parallel to the main body 42 , the edging portion 35 extends toward the circumferential side of the main body 42 to form a plurality of limiting teeth 32 , which are in contact with or spaced from the circumferential side of the main body 42 .

[0049] The battery cover structure of this embodiment can be covered on the battery housing. The battery cover structure and the battery housing are jointly enclosed to form a hollow cavity, so as to accommodate the electrode group in the hollow cavity.

[0050] The pole 4 is connected to the pole lug of the pole group, and after passing through the cover body 1, the pole 4 is connected to the external circuit, thereby achieving conduction between the pole group and the external circuit.

[0051] The cover body 1 can be made of aluminum. The pole 4 can be made of aluminum or copper.

[0052] Since the pole 4 is charged, the cover body 1 and the pole 4 need to be insulated.

[0053] The insulating member 3 of this embodiment has a blocking portion 34 that separates the cover body 1 from the main body 42 . By using an insulating material, electrical conduction between the cover body 1 and the pole 4 can be avoided.

[0054] The pole 4 includes a main body 42. Since the pole 4 needs to be stably welded to the pole lug of the pole group, a larger contact surface needs to be set. At the same time, the pole 4 needs to cooperate with the connecting block 2 to be locked on both sides of the cover body 1. By setting the main body 42 to indirectly abut against one side surface of the cover body 1, it can meet the requirements of stable welding and firm abutment at the same time.

[0055] The insulating member 3 also includes a edging portion 35 extending from the blocking portion 34 toward one side of the main body portion 42 and surrounding the outer peripheral side of the main body portion 42. The edging portion 35 can wrap the main body portion 42 to form an installation position for the main body portion 42, thereby facilitating the positioning and assembly of the main body portion 42 and the insulating member 3, and at the same time increasing the creepage distance between the pole 4 and the cover plate body 1.

[0056] The battery cover structure provided in the embodiment of the present application has a plurality of limiting teeth 32 extending from the edging portion 35 toward the circumferential side of the main body 42 in a plane parallel to the main body 42, so that the limiting teeth 32 can abut against the circumferential side of the main body 42, thereby facilitating the assembly of the main body 42 and the insulating member 3, avoiding problems such as shaking of the pole 4 after assembly, and thus helping to ensure the sealing performance of the battery cover structure; at the same time, by limiting the fit of the limiting teeth 32 and the circumferential side of the main body 42 or setting a gap, interference fit between the main body 42 and the insulating member 3 due to processing size errors can be avoided, thereby avoiding assembly difficulties and improving assembly efficiency.

[0057] In some embodiments, as shown in FIG. 7 , the distance between the limiting teeth 32 and the circumferential side surface of the main body portion 42 is L, where L satisfies: 0 mm ≤ L ≤ 0.1 mm.

[0058] By making the limiting teeth 32 fit together with the circumferential side surfaces of the main body 42 or setting a gap therebetween, and further limiting the upper limit of the spacing L between the limiting teeth 32 and the circumferential side surfaces of the main body 42, the shaking amplitude of the pole 4 after assembly can be reduced as much as possible, and by limiting the lower limit of the spacing L between the limiting teeth 32 and the circumferential side surfaces of the main body 42, interference fit between the main body 42 and the insulating part 3 due to processing size errors can be avoided, thereby avoiding assembly difficulties and improving assembly efficiency.

[0059] Optionally, the distance L between the limiting teeth 32 and the circumferential side surface of the main body 42 can be 0 mm, 0.02 mm, 0.03 mm, 0.05 mm, 0.06 mm, 0.08 mm, or 0.1 mm.

[0060] In some embodiments, as shown in Figures 3 and 4, along the width direction of the cover body 1, the opposite sides of the edging portion 35 extend to form limiting teeth 32, and the limiting teeth 32 on both sides are respectively arranged corresponding to the opposite side surfaces of the main body 42.

[0061] By extending the limiting teeth 32 on opposite sides of the edging portion 35 , opposite side surfaces of the main body 42 can be limited by the limiting teeth 32 , thereby preventing the pole 4 from shaking after assembly.

[0062] Optionally, a guide portion is formed on the limiting tooth 32 along the direction in which the main body 42 is installed into the insulating member 3. The guide portion may be a rounded corner, which can facilitate guiding the main body 42 and improve assembly efficiency.

[0063] In some embodiments, as shown in FIG6 and FIG7 , along the width direction of the cover body 1 , a local area of ​​the main body portion 42 protrudes toward the edge portion 35 to form a convex 43 ;

[0064] Along the length direction of the cover body 1, an accommodating groove 33 is formed between two adjacent limiting teeth 32;

[0065] The protrusion 43 is snap-fitted into the receiving groove 33 .

[0066] By engaging the convex bump 43 between two adjacent limiting teeth 32 along the length direction of the cover body 1 , the convex bump 43 is matched with the receiving groove 33 , thereby improving positioning accuracy and preventing the pole 4 from shaking after assembly.

[0067] In addition, by properly setting the position of the convex bump 43 and the distance between two adjacent limiting teeth 32 used to form the accommodating groove 33, it is also possible to achieve a foolproof installation of the pole 4.

[0068] In some embodiments, as shown in FIG. 7 , along the length direction of the cover plate body 1 , the projections 43 and the limiting teeth 32 overlap.

[0069] Along the length of the cover body 1, the projections 43 overlap with the projections of the limiting teeth 32. This allows the limiting teeth 32 to block the projections 43 when the main body 42 moves relative to the insulating member 3 along the length of the cover body 1, thereby limiting the position of the terminal 4. This reduces displacement of the terminal 4 along the length of the cover body 1 after assembly, ensuring accurate assembly positioning.

[0070] In some embodiments, as shown in FIG6 , the pole 4 extends from a side surface of the main body 42 to form a protruding portion 41 , which at least partially protrudes from the cover body 1 and is riveted to the connecting block 2 to fix the pole 4 to the cover body 1 .

[0071] A sealing ring 5 is also sleeved on the outer periphery of the penetration portion 41 , and compression of the sealing ring 5 is achieved by riveting, which can improve the sealing and insulation performance of the entire battery cover structure.

[0072] In some embodiments, as shown in FIG. 4 , the insulating member 3 is provided with a through hole 31 , and the passing portion 41 passes through the through hole 31 .

[0073] In some embodiments, as shown in FIG. 7 , the limiting teeth 32 on both sides are symmetrically arranged relative to the center line of the insulating member 3 along the length direction.

[0074] This facilitates the centering of the main body 42 after installation, thereby improving assembly efficiency.

[0075] In some embodiments, as shown in FIG. 7 , along the width direction of the cover body 1 , two opposite side surfaces of the main body portion 42 are raised to form convex bumps 43 .

[0076] By forming convex bumps 43 on both opposite side surfaces of the main body 42, the convex bumps 43 on both side surfaces of the main body 42 can respectively cooperate with the receiving grooves 33 formed on the insulating member 3, thereby improving positioning accuracy and avoiding the problem of shaking of the pole 4 after assembly.

[0077] According to an embodiment of the present application, on the other hand, a battery is provided, including: the battery cover structure as described above.

[0078] The battery provided in the embodiment of the present application has a plurality of limiting teeth 32 extending from the edging portion 35 toward the circumferential side surface of the main body portion 42 in a plane parallel to the plane where the main body portion 42 is located, so that the limiting teeth 32 can abut against the circumferential side surface of the main body portion 42, thereby facilitating the assembly of the main body portion 42 and the insulating member 3, avoiding problems such as shaking of the pole 4 after assembly, and thus helping to ensure the sealing performance of the battery cover structure; at the same time, by limiting the fit of the limiting teeth 32 and the circumferential side surface of the main body portion 42 or setting a gap, interference fit between the main body portion 42 and the insulating member 3 due to processing size errors can be avoided, thereby avoiding assembly difficulties and improving assembly efficiency.

[0079] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined in the present application.

Claims

1. A battery cover structure, characterized in that: include: Cover plate body (1); A pole (4) having a main body portion (42) that indirectly contacts a side surface of the cover plate body (1); an insulating member (3) disposed between the cover body (1) and the main body (42), the insulating member (3) comprising a blocking portion (34) for spacing the cover body (1) and the main body (42), and a rim portion (35) extending from the blocking portion (34) toward one side of the main body (42) and surrounding the outer periphery of the main body (42); In a plane parallel to the main body (42), the edge portion (35) extends toward the circumferential side of the main body (42) to form a plurality of limiting teeth (32), and the limiting teeth (32) are in contact with or spaced from the circumferential side of the main body (42).

2. The battery cover structure according to claim 1, characterized in that: The distance between the limiting teeth (32) and the circumferential side surface of the main body (42) is L, wherein L satisfies: 0mm≤L≤0.1mm.

3. The battery cover structure according to claim 1, characterized in that: The limiting teeth (32) are extended to form the opposite sides of the edge portion (35) along the width direction of the cover plate body (1), and the limiting teeth (32) on both sides are respectively arranged corresponding to the opposite side surfaces of the main body portion (42).

4. The battery cover structure according to claim 1, characterized in that: Along the width direction of the cover plate body (1), a local area of the body portion (42) protrudes toward the edge portion (35) to form a convex bump (43); An accommodating groove (33) is formed between two adjacent limiting teeth (32) along the length direction of the cover plate body (1); The convex bump (43) is snap-fitted into the accommodating groove (33).

5. The battery cover structure according to any one of claims 1 to 4, characterized in that: The pole (4) is extended from a side surface of the main body (42) to form a protruding portion (41), and the protruding portion (41) at least partially protrudes from the cover body (1) and is riveted to the connecting block (2) to fix the pole (4) to the cover body (1).

6. The battery cover structure according to claim 5, characterized in that: The insulating member (3) is provided with a through hole (31), and the passing portion (41) passes through the through hole (31).

7. The battery cover structure according to claim 3, characterized in that: The limiting teeth (32) on both sides are symmetrically arranged relative to the center line of the insulating member (3) along the length direction.

8. The battery cover structure according to claim 4, characterized in that: Along the width direction of the cover plate body (1), two opposite side surfaces of the body portion (42) are raised to form convex bumps (43).

9. The battery cover structure according to claim 4, characterized in that: Along the length direction of the cover plate body (1), the projection of the convex bump (43) overlaps with the projection of the limiting tooth (32).

10. A battery, characterized in that: The battery cover structure comprises the battery cover structure according to any one of claims 1 to 9.

Images