Pole column assembly and battery cell cover plate applied by pole column assembly

Abstract

The utility model provides a pole assembly and a battery cell cover plate applied by the pole assembly. The pole assembly comprises a first fixing piece and a second fixing piece, wherein the first fixing piece comprises a first upper periphery and one or more first convex parts extending outwards along the radial direction of the first upper periphery; the pole body is located on the side, away from the first upper periphery, of the first fixing piece in the pole assembly; the second fixing piece is suitable for containing the first fixing piece and the pole body, the second fixing piece comprises a second upper periphery and one or more first containing parts arranged along the second upper periphery, and the first containing parts are suitable for being matched with the first protruding parts, so that relative rotation does not occur between the first fixing piece and the second fixing piece. The pole assembly and the cell cover plate suitable for the pole assembly are simple in assembly process and high in stability.

Description

Technical Field

[0001] The present application mainly relates to the field of batteries, and in particular to a pole assembly and a battery cell cover plate used therein. Background Art

[0002] Power batteries and energy storage batteries are the two major application scenarios of battery technology. Among them, energy storage batteries are mostly used in solar and wind power generation equipment, and power batteries are often used in new energy vehicles. Whether it is a power battery or an energy storage battery, the battery cover is an extremely important component, which plays an important role in the mechanical safety and electrical safety of the battery cell, and is an important carrier for realizing the functions of the battery cell such as conductivity, insulation and sealing.

[0003] For the current battery cells, the battery cell cover plates generally adopt riveting or injection molding structures, and these implementation methods have many shortcomings. For example, the riveted structure cover plate has many parts, the assembly process is complicated, and the cost is high; while the injection molded cover plate has fewer parts, but the pole diameter and height are large, the pole uses more materials and is heavy, and the cost is also high. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a pole assembly and a cell cover plate used therein, which has a simple assembly process and strong stability.

[0005] To solve the above technical problems, the present application provides a pole assembly, comprising: a first fixing member, comprising a first upper edge and one or more first protrusions extending radially outward along the first upper edge; a pole body, located on a side of the first fixing member away from the first upper edge in the pole assembly; and a second fixing member, suitable for accommodating the first fixing member and the pole body, the second fixing member comprising a second upper edge and one or more first accommodating portions arranged along the second upper edge, the first accommodating portion being suitable for cooperating with the first protrusion so that relative rotation does not occur between the first fixing member and the second fixing member.

[0006] Optionally, the lower end surface of the first protrusion is configured to be: flush with the lower end surface of the first accommodation portion in the pole assembly; or located between the lower end surface of the first accommodation portion and the upper end surface of the pole body in the pole assembly.

[0007] Optionally, the outer side surface of the second fixing member has a uniformly distributed same outer diameter along the axial direction of the pole assembly.

[0008] Optionally, the pole body comprises an upper boss, an annular boss and a lower boss sequentially arranged along the positive axial direction of the pole assembly, wherein the maximum outer diameters of the upper boss and the lower boss are both smaller than the outer diameter of the annular boss.

[0009] Optionally, the pole assembly further comprises an annular seal which is sleeved on the lower boss in the pole assembly.

[0010] Optionally, the first fixing member is provided with the first upper peripheral edge and the inner convex ring in sequence along the positive direction of the axial direction, wherein the lower surface of the inner convex ring is suitable for cooperating with the upper surface of the annular boss in the pole assembly.

[0011] Optionally, the pole body also includes one or more second accommodating portions arranged on the upper surface of the annular boss, and the first fixing member also includes one or more second protruding portions arranged on the lower surface of the inner convex ring, wherein the second accommodating portion is suitable for cooperating with the second protruding portion so that relative rotation does not occur between the pole body and the first fixing member.

[0012] In order to solve the above technical problems, another aspect of the present application further proposes a battery cell cover, including the pole assembly in any embodiment of the present application.

[0013] Optionally, the battery cell cover plate also includes an upper fixing member and a lower fixing member, wherein the second fixing member of the pole assembly includes an annular lower surface, the upper fixing member is provided with a pole mounting hole, and the lower fixing member is provided with an annular fixing groove; the pole assembly is suitable for being fixed in the annular fixing groove through the annular lower surface after passing through the pole mounting hole.

[0014] Optionally, the second fixing member further includes a first lower peripheral edge, and the first lower peripheral edge is suitable for being welded and fixed to the lower edge of the pole mounting hole.

[0015] Compared with the prior art, the present application has the following advantages: the present application adopts an independent pole assembly structure, the assembly process is simple, and the relative first fixing part (such as the above plastic) and the second fixing part (such as the aluminum ring) are stopped by a mechanical structure, and the stability is strong. Furthermore, the present application adopts an independent pole assembly that can be prepared as a standard part, which is light in weight and can be directly welded to the upper fixing part (such as a bare aluminum sheet) of the battery cover plate, and the cover plate assembly process is simple. In some preferred embodiments, the independent pole assembly is provided with a stop structure between the pole body and the first fixing part (such as the above plastic), and between the first fixing part (such as the above plastic) and the second fixing part (such as the aluminum ring), so as to increase the torsional resistance of the pole assembly and improve the mechanical strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0017] Figure 1This is an exploded schematic diagram of a pole assembly after being disassembled along the D1 direction according to an embodiment of the present application;

[0018] Figure 2 Yes Figure 1 An exploded schematic diagram of a pole assembly of the embodiment shown in the figure after being disassembled along a D2 direction opposite to a D1 direction;

[0019] Figure 3 is a schematic top view of a pole assembly according to an embodiment of the present application;

[0020] Figure 4 Yes Figure 3 A schematic cross-sectional view of a pole assembly along the AA direction of the illustrated embodiment;

[0021] Figure 5 This is an exploded schematic diagram of a battery cell cover plate according to an embodiment of the present application;

[0022] Figure 6 is a schematic top view of a battery cell cover plate according to an embodiment of the present application; and

[0023] Figure 7 Yes Figure 6 A schematic cross-sectional view of a pole assembly along the BB direction of the illustrated embodiment. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0025] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0027] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0028] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0029] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0030] It should be understood that when a component is referred to as being “on another component,” “connected to another component,” “coupled to another component,” or “contacting another component,” it can be directly on, connected to, coupled to, or contacting the other component, or intervening components may be present. In contrast, when a component is referred to as being “directly on another component,” “directly connected to,” “directly coupled to,” or “directly contacting” another component, there are no intervening components present.

[0031] An embodiment of the present application refers to Figure 1 to Figure 4 A pole assembly 10 is proposed, which has a simple assembly process and strong stability. Specifically, Figure 1 and Figure 2 The exploded schematic diagrams of the pole assembly 10 after being disassembled along the D1 direction and the D2 direction opposite to D1 are shown respectively. Figure 3 and Figure 4 The top view of the pole assembly 10 and the Figure 3 The internal details of the pole assembly 10 are described in detail below based on these drawings.

[0032] First refer to Figure 1, the pole assembly 10 mainly includes a first fixing member 11, a pole body 12 and a second fixing member 14. Specifically, the first fixing member 11 includes a first upper peripheral edge 110 and a plurality of first protrusions 112 extending radially outward along the first upper peripheral edge 110. Further, the pole body 12 is located on a side of the first fixing member 11 away from the first upper peripheral edge 110 in the assembled complete pole assembly 10. In addition, a through cavity 1400 is formed inside the second fixing member 14, and the cavity 1400 makes the second fixing member 14 suitable for accommodating the first fixing member 11 and the pole body 12. More specifically, the second fixing member 14 includes a second upper peripheral edge 140 and a plurality of first accommodating portions 141 arranged along the second upper peripheral edge 140, and the first accommodating portion 141 is suitable for cooperating with the first protrusion 112 so that relative rotation does not occur between the first fixing member 11 and the second fixing member 14. Exemplarily, the first accommodating portion 141 can be a structure of a slot or a hole, and the first protrusion 112 can be understood as a structure of a boss or a convex block.

[0033] It should be noted that Figure 1 In the example shown, the number of the first protrusion 112 and the corresponding first receiving portion 141 are both 4, but the present application is not limited to this number. In different embodiments of the present application, the number of the first protrusion and the first receiving portion can be arbitrarily selected between 1, 2, 3, 4 or more. In addition, in some specific implementation scenarios of the present application, the first fixing member 11 can also be understood as the upper plastic part of the conventional battery pole structure. These traditional upper plastics need to be further processed to have the first protrusion 112 and the second protrusion 111, so as to achieve the technical effect of the present application.

[0034] Preferably, in order to achieve a more compact and reasonable internal space layout of the pole assembly 10 on the basis of achieving a rotation-stopping effect between the first fixing member 11 and the second fixing member 14, the lower end surface 1120 of the first protrusion 112 can be preferably configured in any of the following two situations. The first situation is that it is flush with the lower end surface 1410 of the first accommodating portion 141 in the pole assembly 10; or the second situation is that it is located between the lower end surface 1410 of the first accommodating portion 141 and the upper end surface 1200 of the pole body 12 in the pole assembly 10.

[0035] Continue to refer to Figure 1 The pole body 12 in this embodiment includes an upper boss 123, an annular boss 124 and a lower boss 125 which are sequentially arranged along the positive axial direction of the pole assembly 10. Figure 1 and Figure 2It can be clearly seen that the maximum outer diameters of the upper boss 123 and the lower boss 125 are both smaller than the outer diameter of the annular boss 124. For the convenience of subsequent description, in this embodiment, the direction from the first fixing member 11 to the second fixing member 14 is considered to be the positive axial direction of the pole assembly 10, and the direction from the second fixing member 14 to the first fixing member 11 is considered to be the negative axial direction of the pole assembly 10.

[0036] In this embodiment, the pole assembly 10 preferably further comprises an annular seal 13, which is sleeved on the lower boss 125 of the pole body 12 in the pole assembly 10. Figure 2 The inner wall 131 of the annular seal 13 is adapted to cooperate with the outer wall 122 of the lower boss 125 , thereby playing a sealing role in the pole assembly 10 .

[0037] For more details, see Figure 1 and Figure 2 The first fixing member 11 is provided with a first upper peripheral edge 110 and an inner convex ring 143 in sequence along the positive axial direction. Figure 2 The lower surface 1431 of the inner protruding ring 143 is shown. In this embodiment, the lower surface 1431 of the inner protruding ring 143 is adapted to cooperate with the upper surface 1240 of the annular boss 124 of the pole body 12 in the pole assembly 10.

[0038] Preferably, the pole body 12 in this embodiment further includes a plurality of second receiving portions 121 disposed on the upper surface 1240 of the annular boss 124, and the first fixing member 11 further includes a plurality of second protrusions 111 disposed on the lower surface 1431 of the inner protruding ring 143, wherein the second receiving portions 121 are adapted to cooperate with the second protrusions 111, so that relative rotation does not occur between the pole body 12 and the first fixing member 11. Similar to the first protrusion and the first receiving portion described above, although Figure 1 and Figure 2 In the embodiment shown in FIG. 1 , the number of the second receiving portion 121 and the second protrusion 111 are both 4, but the present application is not limited thereto. In different embodiments of the present application, the number of the second protrusion and the second receiving portion can be arbitrarily selected between 1, 2, 3, 4 or more.

[0039] Exemplarily, the second receiving portion 121 may be a groove or hole structure, and the second protrusion 111 may be understood as a boss or bump structure. Further preferably, in order to better configure the internal space in the pole assembly 10, the height of the second protrusion 111 along the axial direction (i.e., D1 / D2 direction) is less than or equal to the depth of the second receiving portion 121 along the axial direction (i.e., D1 / D2 direction).

[0040] Further references Figure 3 and Figure 4 , Figure 3 The first anti-rotation structure in the pole assembly 10 is shown, that is, the first protrusion 112 and the first receiving portion 141 are used to form an anti-rotation between the first fixing member 11 and the second fixing member 14. Figure 4 , Figure 4 The second anti-rotation structure in the pole assembly 10 is shown, that is, through the cooperation between the second protrusion 111 and the second accommodating portion 121, a anti-rotation is formed between the first fixing member 11 and the pole body 12. In different embodiments of the present application, there may be only a first anti-rotation structure, or there may be both a first anti-rotation structure and a second anti-rotation structure. It can be understood that the overall stability of the pole assembly is better when the first anti-rotation structure and the second anti-rotation structure are simultaneously provided compared to the embodiment with only the first anti-rotation structure. However, compared with the prior art, these different embodiments can increase the torsional resistance of the pole assembly and improve the mechanical strength.

[0041] It should also be noted that the second fixing member 14 in this embodiment can be made of metal such as aluminum, and because it has a through cavity 1400, when the second fixing member 14 is made of aluminum, the second fixing member 14 can also be understood as an aluminum ring from the perspective of appearance and material. Figure 1 and Figure 2 In the multiple embodiments, preferably, the outer side surface 144 of the second fixing member 14 has a uniformly distributed outer diameter along the axial direction of the pole assembly 10. In such an embodiment, combined with the above-mentioned shape and material, the second fixing member 14 can be understood as a hollow aluminum ring structure that is approximately cylindrical in appearance. Figure 2 The second fixing member 14 has a first lower peripheral edge 142 and an annular lower surface 1420 constrained by the first lower peripheral edge 142, and the annular lower surface 1420 is suitable for contacting and assembling with other components of the cell cover in the process of preparing the cell cover.

[0042] according to Figure 5 Another aspect of the present application further provides a battery cover 20, in which the pole assembly provided in any embodiment of the present application is applied, for example, Figure 1 to Figure 4 The pole assembly 10 is shown. Figure 6 and Figure 7 The top view of the cell cover plate 20 and the cross-sectional view along the BB direction of the top view are shown respectively. Specifically, the cell cover plate 20 includes two pole assemblies 10, which have opposite polarities. For example, Figure 5 It can be understood that the battery cell cover 20 includes a positive electrode column assembly 101 and a negative electrode column assembly 102 .

[0043] Furthermore, the cell cover 20 further includes an upper fixing member 3 and a lower fixing member 6, wherein the second fixing member 14 of the pole assembly 10 includes: Figure 2 The annular lower surface 1420 shown, the upper fixing member 3 is provided with a pole mounting hole 31, and the lower fixing member 6 is provided with an annular fixing groove 61. In this embodiment, the pole assembly 10 is suitable for being fixed in the annular fixing groove 61 through the annular lower surface 1420 after passing through the pole mounting hole 31. Exemplarily, referring to the battery cover structure in the prior art, the upper fixing member 3 can be made of a plain aluminum sheet, and the lower fixing member 6 can be considered as a lower plastic. The plain aluminum sheet and the lower plastic need to be further processed to have the pole mounting hole 31 and the annular fixing groove 61 so as to achieve the technical effect of the present application.

[0044] On this basis, the battery cover 20 also includes an explosion-proof valve film 4 and an explosion-proof valve 5. From the perspective of overall assembly, the explosion-proof valve 5 is welded to the lower surface of the upper fixing member 3, the explosion-proof valve film 4 is adhered to the upper surface of the upper fixing member 3, and the lower fixing member 6 is assembled or hot-melted to the lower surface of the upper fixing member. Exemplarily, when the pole assembly 10 is assembled into the battery cover 20 as a standard part, the first lower peripheral edge 142 of the second fixing member 14 of the pole assembly 10 (taking the positive pole assembly 101 as an example) can be laser welded to the lower edge 310 of the pole mounting hole 31 of the upper fixing member 3, and the welding position is as follows: Figure 7 At position C as shown. After such assembly, the annular lower surface 1420 of the second fixing member 14 can be fixed in the annular fixing groove 61 of the lower fixing member 6. From the above assembly process, it can be seen that the assembly of the pole assembly 10 into the battery cover 20 only requires one welding, and the assembly process is simple.

[0045] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0046] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0047] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0048] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0049] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A pole assembly, characterized in that: include: A first fixing member includes a first upper peripheral edge and one or more first protrusions extending radially outwardly along the first upper peripheral edge; A pole body, located in the pole assembly at a side of the first fixing member away from the first upper peripheral edge; as well as The second fixing member is suitable for accommodating the first fixing member and the pole body, the second fixing member includes a second upper peripheral edge and one or more first accommodating portions arranged along the second upper peripheral edge, the first accommodating portions are suitable for cooperating with the first protruding portion to prevent relative rotation between the first fixing member and the second fixing member.

2. The pole assembly according to claim 1, characterized in that: The lower end surface of the first protrusion is configured as follows: flush with the lower end surface of the first accommodation portion in the pole assembly; or In the pole assembly, it is located between the lower end surface of the first accommodation portion and the upper end surface of the pole body.

3. The pole assembly according to claim 1, characterized in that: The outer side surface of the second fixing member has a uniformly distributed same outer diameter along the axial direction of the pole assembly.

4. The pole assembly according to any one of claims 1 to 3, characterized in that: The pole body comprises an upper boss, an annular boss and a lower boss which are sequentially arranged along the positive axial direction of the pole assembly, wherein the maximum outer diameters of the upper boss and the lower boss are both smaller than the outer diameter of the annular boss.

5. The pole assembly according to claim 4, characterized in that: It also includes an annular seal which is sleeved on the lower boss in the pole assembly.

6. The pole assembly according to claim 4, characterized in that: The first fixing member is provided with the first upper peripheral edge and the inner convex ring in sequence along the positive direction of the axial direction, wherein the lower surface of the inner convex ring is suitable for matching with the upper surface of the annular boss in the pole assembly.

7. The pole assembly according to claim 6, characterized in that: The pole body also includes one or more second accommodating portions arranged on the upper surface of the annular boss, and the first fixing member also includes one or more second protruding portions arranged on the lower surface of the inner convex ring, wherein the second accommodating portion is suitable for cooperating with the second protruding portion so that relative rotation does not occur between the pole body and the first fixing member.

8. A battery cell cover, characterized in that: It comprises the pole assembly as claimed in any one of claims 1 to 7.

9. The cell cover plate according to claim 8, characterized in that: It also includes an upper fixing member and a lower fixing member, wherein: The second fixing member of the pole assembly comprises an annular lower surface, the upper fixing member is provided with a pole mounting hole, and the lower fixing member is provided with an annular fixing groove; The pole assembly is suitable for being fixed in the annular fixing groove through the annular lower surface after passing through the pole mounting hole.

10. The cell cover plate according to claim 9, characterized in that: The second fixing member further includes a first lower peripheral edge, and the first lower peripheral edge is suitable for being welded and fixed to the lower edge of the pole mounting hole.

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