Top cover of power battery

Abstract

The utility model discloses a power battery top cover, which comprises a cover body and a pole, the cover body is provided with a mounting hole, the mounting hole extends along the thickness direction of the cover body, the mounting hole is provided with an inner wall surface, a first step surface and a second step surface, the first step surface is arranged around one end of the inner wall surface and extends towards the central axis of the mounting hole, and the second step surface is arranged around the other end of the inner wall surface. The second step surface is arranged in a circle around the other end of the inner wall surface and extends towards the central axis of the mounting hole, the sizes of the first step surface and the second step surface in the thickness direction of the cover body are larger than the thickness of the cover body, the pole comprises a pole body and a protruding part, the protruding part is arranged in a circle around the outer circumferential surface of the pole body, and the pole body is mounted in the mounting hole; the protruding part is installed between the first terrace surface and the second terrace surface. The power battery top cover disclosed by the embodiment of the utility model has the advantages of increasing the internal volume of the power battery and improving the utilization rate of the battery core in the power battery.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a power battery top cover. Background Art

[0002] At present, the cover of the power battery is composed of riveted or injection-molded poles. The pole is a component that conducts electricity inside and outside the power battery. One end of the pole is connected to the external circuit of the power battery, and the other end is connected to the battery cell inside the power battery to realize the charging and discharging function of the battery.

[0003] In the related art, the poles of the power battery extend out of the top cover plate to a high height. When the overall height of the power battery is constant, the internal volume of the power battery is reduced, resulting in a reduction in the utilization rate of the battery cells inside the battery. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a power battery top cover, the arrangement of which has the advantages of increasing the volume inside the power battery and improving the utilization rate of the battery cells inside the power battery.

[0005] The power battery top cover of the embodiment of the utility model comprises:

[0006] A cover body, wherein the cover body has a mounting hole, the mounting hole extends in the thickness direction of the cover body, the mounting hole has an inner wall surface, a first step surface, and a second step surface, the first step surface is arranged around one end of the inner wall surface and extends toward the central axis of the mounting hole, the second step surface is arranged around the other end of the inner wall surface and extends toward the central axis of the mounting hole, and the dimensions of the first step surface and the second step surface in the thickness direction of the cover body are greater than the thickness of the cover body;

[0007] The pole comprises a column and a protrusion, wherein the protrusion is arranged around the outer circumference of the column, the column is installed in the installation hole, and the protrusion is installed between the first step surface and the second step surface.

[0008] The power battery top cover of the embodiment of the utility model is provided with a first step surface and a second step surface, and the distance between the first step surface and the second step surface is greater than the thickness of the cover body, so that the two ends of the mounting hole extend to the two sides of the cover body respectively, thereby extending the length of the mounting hole in the thickness direction of the cover body, reducing the length of the end of the pole extending out of the side of the cover body and connected to the external circuit, increasing the volume inside the power battery, and improving the utilization rate of the battery cells inside the power battery. The protruding portion of the pole is installed between the first step surface and the second step surface, so that the pole is firmly installed in the mounting hole, and the area of ​​the end face of the column is not affected, thereby improving the current flow capacity of the pole surface.

[0009] In some embodiments, the power battery top cover further includes:

[0010] A first extension portion, one end of which is connected to a side surface of the cover body and is arranged around the circumference of the mounting hole, the other end of which extends toward the central axis of the mounting hole, and the side surface of the first extension portion adjacent to the mounting hole is the first step surface;

[0011] A second extension portion, one end of the second extension portion is connected to the other side surface of the cover body, the second extension portion and the first extension portion are spaced apart and arranged opposite to each other, the other end of the second extension portion extends toward the central axis of the mounting hole, and the side surface of the second extension portion adjacent to the mounting hole is the second step surface.

[0012] In some embodiments, the first extension portion and the second extension portion are symmetrically arranged about a center of the mounting hole.

[0013] In some embodiments, the cross-section of the outline formed by the other end of the first extension portion is circular, and the cross-section of the outline formed by the other end of the second extension portion is circular.

[0014] In some embodiments, the thickness of the first extension portion is smaller than the thickness of the cover body, and the thickness of the second extension portion is smaller than the thickness of the cover body.

[0015] In some embodiments, the thickness of the first extension is the same as the thickness of the second extension.

[0016] In some embodiments, the power battery top cover further includes a protective member, which is arranged around at least a portion of the outer circumference of the pole, and the protective member is located between at least a portion of the outer circumference of the pole and the inner wall surface and the first step surface.

[0017] In some embodiments, the power battery top cover further includes a seal, which is arranged around at least a portion of the outer circumference of the pole, and the seal is located between at least a portion of the outer circumference of the pole and the second step surface.

[0018] In some embodiments, the protrusion is located in the middle of the extension direction of the column.

[0019] In some embodiments, the cover body also has an explosion-proof valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a power battery top cover according to an embodiment of the utility model.

[0021] Figure 2It is a cross-sectional view of a power battery top cover according to an embodiment of the utility model.

[0022] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0023] Figure numerals: 1, cover body; 11, mounting hole; 111, inner wall surface; 112, first step surface; 113, second step surface; 12, explosion-proof valve; 2, pole; 21, column; 22, protrusion; 3, first extension portion; 31, first vertical section; 32, first horizontal section; 4, second extension portion; 41, second vertical section; 42, second horizontal section; 5, protective member; 6, sealing member. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0025] like Figure 1-3 As shown, the power battery top cover of the utility model embodiment includes a cover body 1 and a pole 2. The cover body 1 has a mounting hole 11, and the mounting hole 11 is along the thickness direction of the cover body 1 (such as Figure 3 The mounting hole 11 has an inner wall surface 111, a first step surface 112 and a second step surface 113. The first step surface 112 surrounds one end of the inner wall surface 111 (as shown in FIG. Figure 3 The upper end of the inner wall surface 111 shown in FIG. 1 is provided around and extends toward the central axis of the mounting hole 11. The second step surface 113 surrounds the other end of the inner wall surface 111 (as shown in FIG. 11). Figure 3 The first step surface 112 and the second step surface 113 are arranged around and extend toward the central axis of the mounting hole 11, and the dimensions of the first step surface 112 and the second step surface 113 in the thickness direction of the cover body 1 are greater than the thickness of the cover body 1. Specifically, the first step surface 112 and the second step surface 113 are symmetrically arranged on the central axis of the mounting hole 11 with respect to the center of the mounting hole 11, so that the two ends of the mounting hole 11 extend in opposite directions.

[0026] The pole 2 includes a column 21 and a protrusion 22, the protrusion 22 is arranged around the outer circumference of the column 21, the column 21 is installed in the mounting hole 11, and the protrusion 22 is installed between the first step surface 112 and the second step surface 113. Specifically, the protrusion 22 is located in the middle position of the extension direction of the column 21, and when the pole 2 is installed in the mounting hole 11, the distance between the upper end of the column 21 and the first step surface 112 in the vertical direction is the same as the distance between the lower end of the column 21 and the second step surface 113 in the vertical direction.

[0027] The power battery top cover of the embodiment of the utility model is provided with a first step surface 112 and a second step surface 113, and the distance between the first step surface 112 and the second step surface 113 is greater than the thickness of the cover body 1, so that the two ends of the mounting hole 11 extend to the two sides of the cover body 1 respectively, and the length of the mounting hole 11 in the thickness direction of the cover body 1 is extended, and the length of the end of the pole 2 extending out of the side of the cover body 1 and connected to the external circuit is reduced, thereby increasing the volume inside the power battery and improving the utilization rate of the battery cells inside the power battery. The protruding portion 22 of the pole 2 is installed between the first step surface 112 and the second step surface 113, so that the pole 2 is firmly installed in the mounting hole 11, and the area of ​​the end surface of the column 21 is not affected, thereby improving the current flow capacity of the surface of the pole 2.

[0028] In some embodiments, the power battery top cover further includes a first extension portion 3 and a second extension portion 4. One end of the first extension portion 3 is connected to a side surface of the cover body 1 and is arranged around the circumference of the mounting hole 11, and the other end of the first extension portion 3 extends toward the central axis of the mounting hole 11, and the side surface of the first extension portion 3 adjacent to the mounting hole 11 is a first step surface 112.

[0029] Specifically, the first extension portion 3 includes a first vertical section 31 and a first horizontal section 32. The lower end of the first vertical section 31 is connected to the upper surface of the cover body 1 and is arranged around the circumference of the mounting hole 11. The upper end of the first vertical section 31 is connected to one end of the first horizontal section 32. The other end of the first horizontal section 32 extends toward the central axis of the mounting hole 11. The side surface of the first vertical section 31 adjacent to the mounting hole 11 and the side surface of the first horizontal section 32 adjacent to the mounting hole 11 form a first step surface 112.

[0030] One end of the second extension portion 4 is connected to the other side of the cover body 1. The second extension portion 4 and the first extension portion 3 are spaced apart and arranged opposite to each other. The other end of the second extension portion 4 extends toward the central axis of the mounting hole 11. The side of the second extension portion 4 adjacent to the mounting hole 11 is a second step surface 113.

[0031] Specifically, the second extension portion 4 includes a second vertical section 41 and a second horizontal section 42, the upper end of the second vertical section 41 is connected to the lower surface of the cover body 1 and is arranged around the circumference of the mounting hole 11, the lower end of the second vertical section 41 is connected to one end of the second horizontal section 42, and the other end of the second horizontal section 42 extends toward the central axis of the mounting hole 11, and the side surface of the second vertical section 41 adjacent to the mounting hole 11 and the side surface of the second horizontal section 42 adjacent to the mounting hole 11 form a second step surface 113.

[0032] In some embodiments, the first extension portion 3 and the second extension portion 4 are symmetrically arranged with respect to the center of the mounting hole 11 .

[0033] Specifically, the length of the second vertical section 41 in the up-down direction is the same as the length of the first vertical section 31 in the up-down direction, so that the length of the upper end of the mounting hole 11 extending from the upper surface of the cover body 1 is the same as the length of the lower end of the mounting hole 11 extending from the lower surface of the cover body 1, so as to extend the length of the pole 2 extending into the lower surface of the cover body 1 and shorten the length of the pole 2 extending from the upper surface of the cover body 1, thereby increasing the volume inside the power battery and improving the utilization rate of the battery cells inside the power battery.

[0034] The extension length of the second horizontal section 42 in the horizontal direction is the same as the extension length of the first horizontal section 32 in the horizontal direction. When the pole 2 is installed in the mounting hole 11, the other end of the second horizontal section 42 extends toward the outer circumferential surface of the lower end of the column 21, and the other end of the first horizontal section 32 extends toward the outer circumferential surface of the upper end of the column 21.

[0035] In some embodiments, the thickness of the first extension portion 3 is less than the thickness of the cover body 1, and the thickness of the second extension portion 4 is less than the thickness of the cover body 1. Specifically, the dimensions of the first extension portion 3 and the second extension portion 4 in the thickness direction of the cover body 1 are both greater than or equal to 0.6 mm, which ensures the support strength of the first extension portion 3 and the second extension portion 4, improves the structural strength of the cover body 1, ensures that the pole 2 is firmly installed in the mounting hole 11, and also ensures the volume inside the power battery.

[0036] Preferably, the thickness of the first extension portion 3 is the same as the thickness of the second extension portion 4, so that the first extension portion 3 and the second extension portion 4 are easy to manufacture with high efficiency.

[0037] In some embodiments, the cross section of the outline formed by the other end of the first extension portion 3 is circular, and the cross section of the outline formed by the other end of the second extension portion 4 is circular. Specifically, the area where the upper end of the column 21 is connected to the external circuit of the power battery and the area where the lower end of the column 21 is connected to the battery cell inside the power battery are increased, thereby ensuring the flow capacity of the surface of the pole 2.

[0038] In some embodiments, a cross section of an outline formed by the other end of the first extension portion 3 and a cross section of an outline formed by the other end of the second extension portion 4 may be rectangular.

[0039] In some embodiments, the distance between the first step surface 112 and the second step surface 113 in the thickness direction of the cover body 1 is 2 mm to 5 mm. Specifically, the protrusion 22 is located between the first step surface 112 and the second step surface 113, at least part of the protective member 5 is located between the first step surface 112 and the protrusion 22, and at least part of the sealing member 6 is located between the protrusion 22 and the second step surface 113. The protective member 5 is squeezed by the first step surface 112 and the protrusion 22, and the sealing member 6 is squeezed by the second step surface 113 and the protrusion 22, thereby ensuring the stability of the installation of the protective member 5 and the sealing member 6.

[0040] In some embodiments, the power battery top cover further includes a protective member 5, which is arranged around at least part of the outer circumference of the pole 2, and is located between at least part of the outer circumference of the pole 2 and the inner wall surface 111 and the first step surface 112. Specifically, the protective member 5 extends around the outer circumference of the pole 2, the lower end of the protective member 5 extends to the side of the protrusion 22, and the upper end of the protective member 5 extends to the upper end of the column 21, so as to protect the pole 2.

[0041] In some embodiments, the power battery top cover further includes a seal 6, which is arranged around at least part of the outer circumference of the pole 2, and is located between at least part of the outer circumference of the pole 2 and the second step surface 113. Specifically, the seal 6 extends around the outer circumference of the pole 2, and the seal 6 is fitted between the lower surface of the protrusion 22 and the second step surface 113, playing a sealing role to ensure the sealing of the power battery.

[0042] In some embodiments, the cover body 1 is further provided with an explosion-proof valve 12. Specifically, the cover body 1 is provided with two mounting holes 11, the explosion-proof valve 12 is located between the two mounting holes 11, and the two mounting holes 11 and the explosion-proof valve 12 are evenly spaced, one mounting hole 11 is used to install the positive pole, and the other mounting hole 11 is used to install the negative pole.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A power battery top cover, characterized in that: include: A cover body (1), wherein the cover body (1) has a mounting hole (11), the mounting hole (11) extends in the thickness direction of the cover body (1), the mounting hole (11) has an inner wall surface (111), a first step surface (112) and a second step surface (113), the first step surface (112) is arranged around one end of the inner wall surface (111) and extends towards the central axis of the mounting hole (11), the second step surface (113) is arranged around the other end of the inner wall surface (111) and extends towards the central axis of the mounting hole (11), and the dimensions of the first step surface (112) and the second step surface (113) in the thickness direction of the cover body (1) are greater than the thickness of the cover body (1); A pole (2), the pole (2) comprising a column (21) and a protrusion (22), the protrusion (22) being arranged around the outer circumference of the column (21), the column (21) being installed in the installation hole (11), and the protrusion (22) being installed between the first step surface (112) and the second step surface (113).

2. The power battery top cover according to claim 1, characterized in that: Also includes: a first extension portion (3), one end of the first extension portion (3) being connected to a side surface of the cover body (1) and being arranged around the circumference of the mounting hole (11), the other end of the first extension portion (3) extending toward the central axis of the mounting hole (11), and the side surface of the first extension portion (3) adjacent to the mounting hole (11) being the first step surface (112); A second extension portion (4), one end of the second extension portion (4) is connected to the other side surface of the cover body (1), the second extension portion (4) and the first extension portion (3) are spaced apart and arranged opposite to each other, the other end of the second extension portion (4) extends toward the central axis of the mounting hole (11), and the side surface of the second extension portion (4) adjacent to the mounting hole (11) is the second step surface (113).

3. The power battery top cover according to claim 2, characterized in that: The first extension portion (3) and the second extension portion (4) are arranged symmetrically with respect to the center of the mounting hole (11).

4. The power battery top cover according to claim 2, characterized in that: The cross section of the outline formed by the other end of the first extension portion (3) is circular, and the cross section of the outline formed by the other end of the second extension portion (4) is also circular.

5. The power battery top cover according to claim 2, characterized in that: The thickness of the first extension portion (3) is smaller than the thickness of the cover body (1), and the thickness of the second extension portion (4) is smaller than the thickness of the cover body (1).

6. The power battery top cover according to claim 5, characterized in that: The thickness of the first extension portion (3) is the same as the thickness of the second extension portion (4).

7. The power battery top cover according to claim 1, characterized in that: It also comprises a protective member (5), which is arranged around at least part of the outer peripheral surface of the pole (2), and the protective member (5) is located between at least part of the outer peripheral surface of the pole (2) and the inner wall surface (111) and the first step surface (112).

8. The power battery top cover according to claim 1, characterized in that: It also comprises a sealing member (6), wherein the sealing member (6) is arranged around at least part of the outer peripheral surface of the pole (2), and the sealing member (6) is located between at least part of the outer peripheral surface of the pole (2) and the second step surface (113).

9. The power battery top cover according to claim 1, characterized in that: The protruding portion (22) is located at a middle position in the extension direction of the column (21).

10. The power battery top cover according to claim 1, characterized in that: The cover body (1) is also provided with an explosion-proof valve (12).

Images