Insulation assembly and power battery

Abstract

The utility model provides an insulating assembly and a power battery, the insulating assembly comprises: an insulating member having a first accommodating cavity and a first through hole communicated with the first accommodating cavity, the first accommodating cavity being used for accommodating a core package; the bottom supporting sheet is arranged at the bottom of the insulating part and is far away from one side of the first accommodating cavity, and the bottom supporting sheet is provided with a second through hole; and the blocking piece is arranged on the outer wall of the insulating piece and covers the first through hole and the second through hole so as to block the first through hole and the second through hole. By applying the technical scheme of the utility model, the technical problem of easy short circuit of the core cladding in the related technology can be improved.

Description

Technical Field

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

[0002] At present, batteries are widely used in the field of new energy, such as new energy vehicles, storage power stations, etc. New energy vehicles have become a new development trend in the automotive industry, and the battery safety and service life in new energy vehicles are very important to consumers. Therefore, how to improve battery safety and cycle life is an important research direction in the field of battery technology.

[0003] Among various safety performance indicators, insulation performance is an important indicator. When the electrode assembly is in direct contact with the aluminum shell, it will cause a short circuit in the battery, leading to thermal runaway, fire, and explosion; therefore, the protection of the electrode assembly is particularly critical in the battery.

[0004] However, during use, the core package may collide with other structures and cause powder loss, which may 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. Utility Model Content

[0005] The embodiments of the utility model provide an insulating component and a power battery, which can improve the technical problem of easy short circuit of the core package in the related art.

[0006] In the first aspect, an embodiment of the utility model 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 is used to accommodate the core package; a bottom supporting plate, arranged at the bottom of the insulating part and away from the side of the first accommodating cavity, the bottom supporting plate has a second through hole; a sealing part, arranged on the outer wall of the insulating part, the sealing part cover is arranged on the first through hole and / or the second through hole to seal the first through hole and the second through hole.

[0007] In one embodiment, the first through hole is located at the bottom of the insulating member, and the axes of the first through hole and the second through hole do not overlap.

[0008] In one embodiment, the first through hole is located on a side wall of the insulating member.

[0009] In one embodiment, the shortest distance between the first through hole and the second through hole is L1, the length of the bottom support sheet is L2, and 15 mm≤L1≤1 / 2L2.

[0010] In one embodiment, the shortest distance between the center of the second through hole and the edge of the bottom supporting piece extending along the first direction is L3, and 10 mm≤L3≤40 mm.

[0011] In one embodiment, the shortest distance between the edge of the blocking member and the edge of the second through hole is L4, 3mm≤L4≤8mm.

[0012] In one embodiment, the shortest distance between the edge of the blocking member and the edge of the first through hole is L5, and 3mm≤L5≤8mm.

[0013] In one embodiment, the extending length of the blocking member along the second direction is L6, the extending length of the insulating member along the second direction is L7, and L6=1.2L7.

[0014] In one embodiment, the insulating member is formed by bending an insulating film in one piece.

[0015] In a second aspect, an embodiment of the utility model provides a power battery, the power battery comprising: the above-mentioned insulation component; a core pack disposed in a first accommodating cavity of the insulation component; a shell having a second accommodating cavity, and the insulation component is disposed in the second accommodating cavity.

[0016] By applying the technical solution of the utility model, a sealing member is provided on the outer wall of the insulating member. In this way, when powder falls off from the core package in the insulating member, it cannot leak from the insulating member 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 requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of the insulation assembly provided by the first embodiment of the utility model;

[0019] Figure 2 is a three-dimensional schematic diagram of an insulating assembly provided in a second embodiment of the utility model;

[0020] Figure 3 It is a bottom view schematic diagram of the insulation assembly provided by the first embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of a bottom support sheet provided in an embodiment of the utility model;

[0022] Figure 5 is a side schematic diagram of an insulating assembly provided in a second embodiment of the utility model;

[0023] Figure 6It is a schematic diagram of the expansion of the insulating member provided by the first embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the expansion of the insulating member provided by the second embodiment of the utility model.

[0025] The above drawings include the following reference numerals:

[0026] 10. Insulating member; 11. First accommodating cavity; 12. First through hole;

[0027] 20. bottom support sheet; 21. second through hole;

[0028] 30. Blocking parts;

[0029] X, first direction. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0031] like Figures 1 to 3 As shown, in the first aspect, an embodiment of the utility model provides an insulation component, 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 connected to the first accommodating cavity 11, the first accommodating cavity 11 is used to accommodate the core package, the bottom support sheet 20 is arranged at the bottom of the insulation member 10 and away from the side of the first accommodating cavity 11, the bottom support sheet 20 has a second through hole 21, and the blocking member 30 is arranged on the outer wall of the insulation 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.

[0032] By applying the technical solution of the utility model, a sealing member 30 is provided on the outer wall of the insulating member 10. In this way, when powder falling occurs in the core package in the insulating member 10, it cannot leak from the insulating member 10 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 requirements.

[0033] like Figure 1As shown, 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 overlap. This arrangement can prevent the core package from falling directly into the shell from the first through hole 12 and the second through hole 21 after the powder falls off, thereby further reducing the risk of short circuit between the core package and the shell, which is conducive to maintaining the stability of the device during operation to meet the user's usage needs.

[0034] like Figure 2 As shown, the first through hole 12 is located on the side wall of the insulating member 10. This arrangement can further prevent the core package from leaking through the second through hole 21 after the powder falls off, so as to cause the risk of short circuit in the core package, thereby improving the safety of the device during operation. Optionally, the first through hole 12 can also be set in other places, as long as the axis of the first through hole 12 and the second through hole 21 can be avoided from coinciding, so as to improve the applicability of the device to meet the use requirements in different scenarios.

[0035] like Figure 3 As shown, 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 15mm≤L1≤1 / 2L2. When L1<15mm, the distance between the first through hole 12 and the second through hole 21 is too short, which is not convenient for the processing of the structure, increases the processing difficulty of the structure, and easily increases the production cost of the device; when L1>1 / 2L2, the spacing between the first through hole 12 and the second through hole 21 is too large, which is not only not convenient for the blocking member 30 to block the two, but also not convenient 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.

[0036] like Figure 4 As shown, 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, 10mm≤L3≤40mm. When L3<10mm, the distance between the second through hole 21 and the bottom support sheet 20 is too short, which is not convenient for the processing of the second through hole 21 and will increase the processing difficulty of the second through hole 21; when L3>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 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 blocking member 30. In the present 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.

[0037] like Figure 3As shown, 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. When L4<3mm, the distance between the edge of the second through hole 21 and 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>8mm, the distance between the edge of the second through hole 21 and the blocking member 30 is too large, which will increase the length of the blocking member 30, and further increase 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 can meet the use requirements of the device.

[0038] like Figure 5 As shown, 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. When L5<3mm, the distance between the edge of the first through hole 12 and 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>8mm, the distance between the edge of the first through hole 12 and the blocking member 30 is too large, which will increase the length of the blocking member 30, and further increase the production cost of the device. Therefore, setting 3mm≤L5≤8mm can not only reduce the difficulty of processing 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.

[0039] Specifically, the extension length of the blocking member 30 along the second direction is L6, the extension length of the insulating member 10 along the second direction is L7, and L6=1.2L7. This arrangement can increase the coverage of the blocking member 30 on the insulating member 10, thereby improving 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 can be met.

[0040] In one embodiment, the insulating member 10 is formed by bending an insulating film in one piece. Figure 6 and Figure 7 As shown, the insulating film can be folded along the dotted lines in the figure to form the insulating member 10.

[0041] Among them, in the present 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 is not only convenient for component processing, but also can reduce the overall weight of the device, thereby facilitating the lightweight development of the device.

[0042] In a second aspect, an embodiment of the utility model provides a power battery, which includes: the above-mentioned insulation component; a core pack, which is arranged in a first accommodating cavity 11 of the insulation component; and a shell having a second accommodating cavity, in which the insulation component is arranged.

[0043] By applying the technical solution of the utility model, a sealing member 30 is provided on the outer wall of the insulating member 10. In this way, when powder falling occurs in the core package in the insulating member 10, it cannot leak from the insulating member 10 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 requirements.

[0044] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. 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, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as 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 once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] In the description of the present utility model, it needs to 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 utility model 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 utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] 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.

[0048] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An insulating component, characterized in that: The insulation assembly comprises: 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, characterized in that: 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, characterized in that: The first through hole (12) is located on the side wall of the insulating member (10).

4. The insulation assembly according to claim 2, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 claim 1, characterized in that: The insulating member (10) is formed by bending an insulating film in one piece.

10. A power battery, characterized in that: The power battery comprises: The insulation assembly according to any one of claims 1 to 9; 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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