Insulating assembly and power battery

Abstract

An insulating assembly and a power battery. The insulating assembly comprises: an insulating member (10) provided with a first accommodating cavity (11) and first through holes (12) communicated with the first accommodating cavity (11), the first accommodating cavity (11) being used for accommodating a core package; a bottom supporting piece (20) arranged at the bottom of the insulating member (10) and on the side thereof away from the first accommodating cavity (11), wherein second through holes (21) are formed in the bottom supporting piece (20); and a blocking member (30) provided on the outer wall of the insulating member (10), the blocking member (30) covering the first through holes (12) and the second through holes (21) so as to block the first through holes (12) and the second through holes (21).

Description

Insulation component and power battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 5, 2023, with application number 202323323081.2. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of power batteries, and in particular to an insulation component and a power battery. Background Art

[0003] Batteries are currently widely used in the new energy sector, such as new energy vehicles and power storage stations. New energy vehicles have become a new development trend in the automotive industry. Battery safety and service life are crucial for consumers, so improving battery safety and cycle life is a key research direction in battery technology. Among various safety performance indicators, insulation performance is a key one. Direct contact between the electrode assembly and the aluminum casing can cause a short circuit, leading to thermal runaway, fire, and explosion. Therefore, protecting the electrode assembly is particularly critical in batteries. SUMMARY OF THE INVENTION

[0004] However, during use, the core package may collide with other structures and cause powder to fall off, which can easily lead to the risk of short circuit between the core package and the shell, thereby reducing the stability of the core package during operation.

[0005] Therefore, it is urgent to design an insulating component and a power battery to solve the technical risks.

[0006] In a first aspect, the present application provides an insulating component, which includes: an insulating part, having a first accommodating cavity and a first through hole connected to the first accommodating cavity, the first accommodating cavity being used to accommodate a core package; a bottom supporting piece, arranged at the bottom of the insulating part and on a side away from the first accommodating cavity, the bottom supporting piece having a second through hole; a sealing part, arranged on the outer wall of the insulating part, the sealing part covering the first through hole and / or the second through hole to seal the first through hole and the second through hole.

[0007] In a second aspect, the present application also provides a power battery, which includes: the above-mentioned insulation component; a core pack, which is arranged in a first accommodating cavity of the insulation component; and a shell, which has a second accommodating cavity, and the insulation component is arranged in the second accommodating cavity. Beneficial effects

[0008] The insulating assembly provided by the present application has a blocking member provided on the outer wall of the insulating member. In this way, when the core package in the insulating member produces powder loss, it cannot leak from the insulating member to the outside, thereby preventing the core package from contacting with the shell and causing a short circuit, thereby ensuring the safety and stability of the core package during operation to meet the user's usage needs.

[0009] The power battery provided in the present application can ensure the stability of the power battery during operation by arranging the insulating assembly in the second accommodating cavity of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a perspective schematic diagram of an insulation assembly provided in a first embodiment;

[0011] FIG2 is a perspective schematic diagram of an insulation assembly provided by a second embodiment;

[0012] FIG3 is a bottom view of the insulating assembly provided in the first embodiment;

[0013] FIG4 is a schematic structural diagram of a bottom support sheet provided in an embodiment;

[0014] FIG5 is a side view of an insulating assembly provided in a second embodiment;

[0015] FIG6 is a schematic diagram of an expanded insulating member provided in the first embodiment;

[0016] FIG. 7 is a schematic diagram of an expanded insulating member provided in the second embodiment.

[0017] Description of reference numerals:

[0018] 10. Insulating member; 11. First accommodating cavity; 12. First through hole;

[0019] 20. Bottom supporting piece; 21. Second through hole;

[0020] 30. Sealing parts;

[0021] X, first direction. Modes for Carrying Out the Invention

[0022] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0023] As shown in Figures 1 to 3, in a first aspect, an embodiment of the present application provides an insulation assembly, which includes an insulation member 10, a bottom support sheet 20, and a blocking member 30. The insulation member 10 has a first accommodating cavity 11 and a first through-hole 12 communicating with the first accommodating cavity 11, the first accommodating cavity 11 being used to accommodate a core package, the bottom support sheet 20 being disposed at the bottom of the insulation member 10 and away from a side of the first accommodating cavity 11, the bottom support sheet 20 having a second through-hole 21, and the blocking member 30 being disposed on an outer wall of the insulation member 10, covering the first through-hole 12 and / or the second through-hole 21 to block the first through-hole 12 and the second through-hole 21.

[0024] By applying the technical solution of the present application, a sealing member 30 is provided on the outer wall of the insulating member 10. With this arrangement, when powder is lost from the core package in the insulating member 10, the powder cannot leak from the insulating member 10 to the outside, thereby preventing the core package from contacting the shell and causing a short circuit, thereby ensuring the safety and stability of the core package during operation to meet the user's usage needs.

[0025] As shown in Figure 1 , the first through-hole 12 is located at the bottom of the insulating member 10, and the axes of the first through-hole 12 and the second through-hole 21 do not coincide. This arrangement prevents powder from falling from the core package from directly falling into the housing through the first through-hole 12 and the second through-hole 21, thereby further reducing the risk of a short circuit between the core package and the housing, and helping to maintain the stability of the device during operation to meet user requirements.

[0026] As shown in Figure 2, the first through-hole 12 is located on the sidewall of the insulating member 10. This arrangement further prevents the risk of core powder from leaking through the second through-hole 21 and causing a short circuit in the core package, thereby improving the safety of the device during operation. Alternatively, the first through-hole 12 can be located elsewhere, as long as the axes of the first through-hole 12 and the second through-hole 21 do not overlap. This improves the applicability of the device to meet the needs of different scenarios.

[0027] As shown in Figure 3, the shortest distance between the first through hole 12 and the second through hole 21 is L1, the length of the bottom support piece 20 is L2, and 15mm≤L1≤1 / 2L2. When L1 is less than 15mm, the distance between the first through hole 12 and the second through hole 21 is too short, which is inconvenient for the processing of the structure, increases the processing difficulty of the structure, and easily increases the production cost of the device; when L1 is greater than 1 / 2L2, the spacing between the first through hole 12 and the second through hole 21 is too large, which is not only inconvenient for the blocking member 30 to block the two, but also inconvenient for the device to be positioned during installation, thus reducing the assembly efficiency of the device. Therefore, setting 15mm≤L1≤1 / 2L2 can reduce the processing cost of the device and facilitate the assembly of the device. Optionally, L1 can be set to other values ​​such as 15mm, 18mm or 20mm, as long as it can meet the use requirements of the device.

[0028] As shown in Figure 4, the shortest distance between the center of the second through hole 21 and the edge of the bottom support sheet 20 extending along the first direction is L3, and 10mm≤L3≤40mm. When L3 is less than 10mm, the distance between the second through hole 21 and the bottom support sheet 20 is too short, which is inconvenient for processing the second through hole 21 and increases the processing difficulty of the second through hole 21; when L3 is greater than 40mm, the distance between the second through hole 21 and the bottom support sheet 20 is too large, which is not conducive to the blocking of the second through hole 21 by the blocking member 30, thereby increasing the length of the blocking member 30 and further increasing the production cost of the device. Therefore, setting 10mm≤L3≤40mm can not only reduce the processing difficulty of the second through hole 21, but also facilitate the blocking of the second through hole 21 by the blocking member 30. In this application, L3 can be set to other values ​​such as 10mm, 20mm or 40mm, as long as it can meet the use requirements of the device.

[0029] As shown in Figure 3, the shortest distance between the edge of the blocking member 30 and the edge of the second through hole 21 is L4, and 3mm≤L4≤8mm. When L4 is less than 3mm, the distance between the second through hole 21 and the edge of the blocking member 30 is too short, which is not conducive to the blocking of the blocking member 30 and reduces the blocking effect of the blocking member 30. When L4 is greater than 8mm, the distance between the second through hole 21 and the edge of the blocking member 30 is too large, which increases the length of the blocking member 30 and further increases the production cost of the device. Therefore, setting 3mm≤L4≤8mm can not only reduce the processing difficulty of the second through hole 21, but also facilitate the blocking of the blocking member 30. In this application, L4 can be set to other values ​​such as 3mm, 5mm, or 8mm, as long as it meets the use requirements of the device.

[0030] As shown in Figure 5, the shortest distance between the edge of the blocking member 30 and the edge of the first through hole 12 is L5, and 3mm≤L5≤8mm. When L5 is less than 3mm, the distance between the first through hole 12 and the edge of the blocking member 30 is too short, which is not conducive to the blocking of the blocking member 30 and reduces the blocking effect of the blocking member 30. When L5 is greater than 8mm, the distance between the first through hole 12 and the edge of the blocking member 30 is too large, which increases the length of the blocking member 30 and further increases the production cost of the device. Therefore, setting 3mm≤L5≤8mm can not only reduce the processing difficulty of the first through hole 12, but also facilitate the blocking of the blocking member 30. In this application, L5 can be set to other values ​​such as 3mm, 5mm, or 8mm, as long as it can meet the use requirements of the device.

[0031] Specifically, the length of the blocking member 30 extending along the second direction is L6, and the length of the insulating member 10 extending along the second direction is L7, where L6 = 1.2L7. This configuration increases the coverage of the insulating member 10 by the blocking member 30, thereby enhancing the blocking effect of the blocking member 30. Of course, in other embodiments of the present application, L6 can also be other multiples of L7, as long as the blocking requirements of the blocking member 30 are met.

[0032] In one embodiment, the insulating member 10 is formed by bending an insulating film in one piece. As shown in FIG6 and FIG7 , the insulating film is folded along the dotted lines in the figures to form the insulating member 10 .

[0033] Among them, in this application, the material of the insulating member 10 and the bottom support sheet 20 is PP (polypropylene). Since polypropylene is a non-toxic, odorless, tasteless, milky white, highly crystalline polymer with a density of only 0.90-0.91g / cm3, it is one of the lightest varieties of all plastics. It not only facilitates the processing of components, but also can reduce the overall weight of the device, thereby facilitating the lightweight development of the device.

[0034] In a second aspect, an embodiment of the present application provides a power battery, comprising: the above-mentioned insulation assembly; a core pack disposed in a first accommodating cavity 11 of the insulation assembly; and a shell having a second accommodating cavity, in which the insulation assembly is disposed.

[0035] By applying the technical solution of the present application, a sealing member 30 is provided on the outer wall of the insulating member 10. With this arrangement, when powder is lost from the core package in the insulating member 10, the powder cannot leak from the insulating member 10 to the outside, thereby preventing the core package from contacting the shell and causing a short circuit, thereby ensuring the safety and stability of the core package during operation to meet the user's usage needs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​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 drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0038] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0041] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An insulation assembly, comprising: An insulating member (10) having a first accommodating cavity (11) and a first through hole (12) communicating with the first accommodating cavity (11), wherein the first accommodating cavity (11) is used to accommodate a core package; A bottom supporting sheet (20) is arranged at the bottom of the insulating member (10) and at a side away from the first accommodating cavity (11), and the bottom supporting sheet (20) has a second through hole (21); A blocking member (30) is arranged on the outer wall of the insulating member (10), and the blocking member (30) is covered on the first through hole (12) and / or the second through hole (21) to block the first through hole (12) and the second through hole (21).

2. The insulation assembly according to claim 1, wherein: The first through hole (12) is located at the bottom of the insulating member (10), and the axes of the first through hole (12) and the second through hole (21) do not coincide.

3. The insulation assembly according to claim 1, wherein: The first through hole (12) is located on the side wall of the insulating member (10).

4. The insulation assembly according to claim 2, wherein: The shortest distance between the first through hole (12) and the second through hole (21) is L1, the length of the bottom support sheet (20) is L2, and 15 mm ≤ L1 ≤ 1 / 2 L2.

5. The insulation assembly according to any one of claims 1 to 4, wherein: The shortest distance between the center of the second through hole (21) and the edge of the bottom supporting sheet (20) extending along the first direction is L3, and 10 mm ≤ L3 ≤ 40 mm.

6. The insulation assembly according to claim 1, wherein: The shortest distance between the edge of the blocking member (30) and the edge of the second through hole (21) is L4, 3mm≤L4≤8mm.

7. The insulation assembly according to claim 3, wherein: The shortest distance between the edge of the blocking member (30) and the edge of the first through hole (12) is L5, 3mm≤L5≤8mm.

8. The insulation assembly according to claim 5, wherein: The extending length of the blocking member (30) along the first direction is L6, and the extending length of the insulating member (10) along the first direction is L7, where L6=1.2L7.

9. The insulation assembly according to any one of claims 1 to 8, wherein: The insulating member (10) is formed by bending an insulating film in one piece.

10. The insulation assembly according to any one of claims 1 to 8, wherein: The material of the insulating member (10) and the bottom support sheet (20) includes polypropylene.

11. A power battery, comprising: The insulation assembly according to any one of claims 1 to 10; A core package, arranged in the first accommodating cavity (11) of the insulating component; The shell has a second accommodating cavity, and the insulating component is arranged in the second accommodating cavity.

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