Upper insulating part, battery cell cover plate and battery cell

Abstract

The utility model provides an upper insulating part, a battery cell cover plate and a battery cell, and relates to the field of battery cell structures. A through hole used for being connected with a pole is formed in the upper insulating part, a liquid guide part is arranged on the bottom end surface of the upper insulating part, the liquid guide part comprises a plurality of liquid guide grooves which are communicated with one another, and the liquid guide part can penetrate through each side wall of the upper insulating part through the corresponding liquid guide grooves. Therefore, when the electrolyte spills and flows downwards, the electrolyte between the upper insulating part and the light aluminum plate can flow out through the liquid guide part, that is, the electrolyte cannot be accumulated between the upper insulating part and the light aluminum plate, and the electrolyte flowing out can be removed through a subsequent cleaning and drying process.

Description

Technical Field

[0001] The present application relates to the field of battery cell structures, and in particular to an upper insulating member, a battery cell cover plate and a battery cell. Background Art

[0002] At present, during the production and injection process of the battery cell, the problem of electrolyte bubbling often occurs, that is, the electrolyte will bubble out from the injection hole and flow along the bare aluminum plate under the action of gravity to the space between the upper insulating member and the bare aluminum plate (such as Figure 1 The electrolyte will accumulate between the bottom of the upper insulating member and the aluminum plate, and will not be easily cleaned in the subsequent cleaning and drying process. When the electrolyte remains between the bottom of the upper insulating member and the aluminum plate for a long time, the aluminum plate will be easily corroded. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide an upper insulating member, a battery cell cover and a battery cell to solve the problem that electrolyte easily remains between the upper insulating member and the bare aluminum plate in the existing battery cell cover, thereby easily corroding the bare aluminum plate.

[0004] According to the above-mentioned purpose, the first aspect of the utility model provides an upper insulating member, wherein the upper insulating member is formed with a through hole for connecting the pole, and the bottom end surface of the upper insulating member is provided with a liquid conducting portion, the liquid conducting portion includes a plurality of liquid conducting grooves connected to each other, and the liquid conducting portion can pass through each side wall of the upper insulating member through the corresponding liquid conducting grooves.

[0005] Preferably, the recessed depth of each of the liquid-conducting grooves is L, and 0.15 mm<L<0.5 mm.

[0006] Preferably, a mounting groove is formed on the top of the upper insulating member, and the through hole is located at the bottom center of the mounting groove and passes through the mounting groove.

[0007] Preferably, the bottom thickness of the upper insulating member is W, 0.5 mm<(WL)<2.5 mm.

[0008] Preferably, the liquid-conducting groove comprises a first sub-liquid-conducting groove, and the first sub-liquid-conducting groove is formed into a circular ring structure and is disposed around the outer side of the through hole.

[0009] Preferably, the liquid guiding groove includes a plurality of second sub-liquid guiding grooves; the plurality of second sub-liquid guiding grooves are arranged at intervals around the first sub-liquid guiding groove, each of the second sub-liquid guiding grooves extends radially along the first sub-liquid guiding groove, and the first end of each second sub-liquid guiding groove in the extension direction is connected to the first sub-liquid guiding groove, and the second end of each second sub-liquid guiding groove in the extension direction passes through the corresponding side wall of the upper insulating member.

[0010] Preferably, the liquid-conducting groove further includes a plurality of third sub-liquid-conducting grooves, and two ends of the third sub-liquid-conducting grooves in the extending direction are respectively connected to two adjacent second sub-liquid-conducting grooves.

[0011] According to a second aspect of the utility model, a cell cover is provided, wherein the cell cover comprises the upper insulating member as described above, and the cell cover further comprises a plain aluminum plate and a sealing ring; the bottom end face of the upper insulating member is in contact with the top end face of the plain aluminum plate.

[0012] Preferably, along the extension direction of the cell cover plate, a distance D between the end of the liquid guiding portion close to the axis of the through hole and the sealing ring is greater than 2 mm.

[0013] According to a third aspect of the utility model, a battery cell is provided, wherein the battery cell is provided with the battery cell cover plate as described above.

[0014] According to the upper insulating member, the cell cover plate and the cell of the utility model, a liquid guide portion is provided on the bottom end face of the upper insulating member (i.e., the end face thereof in contact with the bare aluminum plate), and the liquid guide portion specifically includes a plurality of liquid guide grooves that are interconnected, and the liquid guide portion can penetrate each side wall of the upper insulating member through the corresponding liquid guide grooves. In this way, when the electrolyte flows downward, the electrolyte between the upper insulating member and the bare aluminum plate can flow out through the liquid guide portion, i.e., the electrolyte will not accumulate between the upper insulating member and the bare aluminum plate, and the electrolyte that flows out can be removed through the subsequent cleaning and drying process.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of a battery cell in the prior art;

[0018] Figure 2 is a schematic diagram of an upper insulating member according to an embodiment of the utility model;

[0019] Figure 3 is another schematic diagram of an upper insulating member according to an embodiment of the utility model;

[0020] Figure 4is a cross-sectional view of an upper insulating member according to an embodiment of the utility model;

[0021] Figure 5 It is a partial cross-sectional view of a battery cell cover according to an embodiment of the utility model.

[0022] Icons: 1-upper insulating part; 10-through hole; 11-first sub-liquid guide groove; 12-second sub-liquid guide groove; 13-third sub-liquid guide groove; 14-assembly groove; 2-plain aluminum plate; 3-pole; 4-sealing ring; 5-riveting block. DETAILED DESCRIPTION

[0023] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0025] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0028] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0029] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0030] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0031] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0032] According to a first aspect of the utility model, an upper insulating member 1 is provided, such as Figures 2 to 5As shown, the bottom end surface of the upper insulating member 1 in this embodiment is provided with a liquid guide portion, which includes a plurality of liquid guide grooves connected to each other, and the liquid guide portion can penetrate each side wall of the upper insulating member 1 through the corresponding liquid guide grooves to facilitate the outlet of the electrolyte. In the following, the specific structure of the above-mentioned parts of the upper insulating member 1 according to the utility model will be described in detail.

[0033] In this embodiment, if Figures 2 to 4 As shown, a mounting groove 14 is formed on the top of the upper insulating member 1, and a through hole 10 for connecting the pole 3 is formed at the center of the bottom of the mounting groove 14, and the through hole 10 passes through the mounting groove 14. The liquid guide portion is formed on the bottom end surface of the upper insulating member 1 (i.e., the end surface away from the mounting groove 14), specifically, as shown in FIG. Figure 2 As shown, the liquid-conducting groove includes a first sub-liquid-conducting groove 11, which is formed into a circular ring structure and is arranged around the outer side of the through hole 10. In addition, the liquid-conducting groove includes a plurality of second sub-liquid-conducting grooves 12; the plurality of second sub-liquid-conducting grooves 12 are arranged at intervals around the first sub-liquid-conducting groove 11, each second sub-liquid-conducting groove 12 extends in the radial direction of the first sub-liquid-conducting groove 11, and the first end of each second sub-liquid-conducting groove 12 in the extending direction is connected to the first sub-liquid-conducting groove 11, and the second end of each second sub-liquid-conducting groove 12 in the extending direction passes through the corresponding side wall of the upper insulating member 1.

[0034] It should be noted that there is no specific restriction on the inner diameter of the first sub-liquid conduit groove 11 (i.e., the distance between it and the outer diameter of the through hole 10); similarly, there is no specific restriction on the number and spacing of the second sub-liquid conduit grooves 12. Based on the arrangement of the cover plate, the electrolyte will flow into the second sub-liquid conduit grooves 12 and then flow out of the second sub-liquid conduit grooves 12 at the other end through the guidance of the first sub-liquid conduit grooves 11.

[0035] Furthermore, the liquid-conducting groove in this embodiment further includes a plurality of third sub-liquid-conducting grooves 13, and the two ends of the third sub-liquid-conducting grooves 13 in the extending direction are respectively connected to two adjacent second sub-liquid-conducting grooves 12. Figure 2 As shown, based on the bottom structure of the upper insulating member 1 in this embodiment, the lengths of the second sub-liquid conducting grooves 12 are different, and the third sub-liquid conducting grooves 13 in this embodiment are only arranged between the two longer second sub-liquid conducting grooves 12 to facilitate the outlet of the electrolyte.

[0036] Preferably, the depression depth of each liquid guide groove is set to L, 0.15mm<L<0.5mm; in addition, the bottom thickness of the upper insulating member 1 is set to W, 0.5mm<(WL)<2.5mm, so that the technical effect of guiding the flow can be achieved while ensuring the structural stability of the upper insulating member 1.

[0037] According to the upper insulating member 1 of the utility model, a liquid guide portion is provided on the bottom end face of the upper insulating member 1 (i.e., the end face thereof in contact with the bare aluminum plate 2), and the liquid guide portion specifically includes a plurality of liquid guide grooves that are interconnected, and the liquid guide portion can penetrate each side wall of the upper insulating member 1 through the corresponding liquid guide grooves. In this way, when the electrolyte flows downward, the electrolyte between the upper insulating member 1 and the bare aluminum plate 2 can flow out through the liquid guide portion, i.e., the electrolyte will not accumulate between the upper insulating member 1 and the bare aluminum plate 2, and the electrolyte that flows out can be removed through the subsequent cleaning and drying process, thereby effectively preventing the bare aluminum plate 2 from being corroded.

[0038] In addition, when the battery cell equipped with the present insulating member 1 is subjected to a sealing test (such as a water test or a helium test), if electrolyte leakage occurs at the pole 3, it can be more easily discovered through the above-mentioned liquid guide grooves (i.e., obvious bubbles will be generated at the leakage point), thereby improving the inspection quality, inspection efficiency and production quality of the battery cell.

[0039] According to a second aspect of the utility model, a cell cover is provided, the cell cover comprises the upper insulating member 1 as described above, Figure 5 As shown, the cell cover plate further includes a riveting block 5 , a plain aluminum plate 2 , a sealing ring 4 , a pole 3 and an upper insulating member 1 , and the bottom end surface of the upper insulating member 1 is in contact with the top end surface of the plain aluminum plate 2 .

[0040] In addition, if Figure 5 As shown, along the extension direction of the battery cover (i.e. Figure 5 In the horizontal direction), the distance between the end of the liquid guide portion close to the axis of the through hole 10 and the sealing ring 4 is greater than 2 mm (ie, D>2 mm) to ensure the sealing requirements of the battery cover.

[0041] According to a third aspect of the utility model, a battery cell is provided, wherein the battery cell is provided with the battery cell cover plate as described above.

[0042] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An upper insulating member, characterized in that: The upper insulating member is formed with a through hole for connecting the pole, and the bottom end surface of the upper insulating member is provided with a liquid guide portion, which includes a plurality of liquid guide grooves connected to each other, and the liquid guide portion can pass through each side wall of the upper insulating member through the corresponding liquid guide grooves.

2. The upper insulating member according to claim 1, characterized in that: The concave depth of each liquid-conducting groove is L, and 0.15 mm<L<0.5 mm.

3. The upper insulating member according to claim 2, characterized in that: A mounting groove is formed at the top of the upper insulating member, and the through hole is located at the center of the bottom of the mounting groove and penetrates the mounting groove.

4. The upper insulating member according to claim 3, characterized in that: The bottom thickness of the upper insulating member is W, 0.5 mm<(WL)<2.5 mm.

5. The upper insulating member according to claim 1, characterized in that: The liquid-conducting groove comprises a first sub-liquid-conducting groove, and the first sub-liquid-conducting groove is formed into a circular ring structure and is arranged around the outer side of the through hole.

6. The upper insulating member according to claim 5, characterized in that: The liquid guiding groove includes a plurality of second sub-liquid guiding grooves; the plurality of second sub-liquid guiding grooves are arranged at intervals around the first sub-liquid guiding groove, each of the second sub-liquid guiding grooves extends radially along the first sub-liquid guiding groove, and the first end of each second sub-liquid guiding groove in the extension direction is connected to the first sub-liquid guiding groove, and the second end of each second sub-liquid guiding groove in the extension direction passes through the corresponding side wall of the upper insulating member.

7. The upper insulating member according to claim 6, characterized in that: The liquid-conducting groove further includes a plurality of third sub-liquid-conducting grooves, and two ends of the third sub-liquid-conducting grooves in the extending direction are respectively connected to two adjacent second sub-liquid-conducting grooves.

8. A battery cell cover, characterized in that: The cell cover comprises the upper insulating member as claimed in any one of claims 1 to 7, and the cell cover further comprises a plain aluminum plate and a sealing ring; the bottom end surface of the upper insulating member is in contact with the top end surface of the plain aluminum plate.

9. The cell cover plate according to claim 8, characterized in that: Along the extension direction of the cell cover plate, a distance D between the end of the liquid guide portion close to the axis of the through hole and the sealing ring is greater than 2 mm.

10. A battery cell, characterized in that: The battery cell is provided with a battery cell cover according to any one of claims 8 to 9.

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