Honeycomb compression-resistant structure of power battery pack

Abstract

The utility model discloses a power battery pack honeycomb compression-resistant structure which comprises a middle frame, a honeycomb retainer is mounted in the middle frame in a matched manner, the honeycomb retainer consists of a plurality of aerogel partition plates, the honeycomb retainer comprises a plurality of complete honeycombs and a plurality of edge honeycombs arranged on the peripheries of the complete honeycombs, and the aerogel partition plates are arranged in the honeycomb retainer. The honeycomb holder comprises a middle frame and a plurality of complete honeycombs, each complete honeycomb is internally provided with a cylindrical battery cell in a matched mode, each edge honeycomb is filled with a phase change material, and the two ends of the middle frame are further provided with end plates for clamping the cylindrical battery cells. After thermal runaway occurs in local single battery cells, due to the fireproof and flame-retardant functions of the aerogel partition plates, the purpose of effectively preventing the thermal runaway from diffusing to other adjacent battery cells is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power battery technical field especially relates to a power battery pack honeycomb compression resistance structure. BACKGROUND

[0002] The power battery on the electric vehicle is usually combined by multiple single cells, but the local single cell may heat the surrounding cells and cause the thermal runaway of the surrounding cells after the thermal runaway. The energy released by the thermal runaway of the single cell is limited, but if the chain reaction occurs to cause the expansion of the thermal runaway, the energy of the whole battery pack is released through the thermal runaway, which will cause great harm. SUMMARY

[0003] The main purpose of the utility model is to provide a power battery pack honeycomb compression resistance structure, which aims to effectively improve the compression resistance performance of the power battery pack and prevent the thermal runaway of the local single cell from spreading to the adjacent cells.

[0004] Therefore, the utility model provides a power battery pack honeycomb compression resistance structure, which comprises a middle frame, a honeycomb retainer is matched and installed in the middle frame, the honeycomb retainer is composed of a plurality of aerogel separators, the honeycomb retainer comprises a plurality of complete honeycombs and a plurality of edge honeycombs arranged around the complete honeycombs, a cylindrical cell is matched and installed in each complete honeycomb, a phase change material is filled in each edge honeycomb, and end plates for clamping the cylindrical cells are arranged at the two ends of the middle frame.

[0005] Specifically, the phase change material is paraffin.

[0006] Specifically, the aerogel separator is a silica nano aerogel separator.

[0007] Specifically, the honeycomb retainer is spliced by a plurality of honeycomb units, each honeycomb unit is enclosed by six side plates, two adjacent honeycomb units are connected through a mortise and tenon structure, and the mortise and tenon structure comprises a mortise groove arranged on the splicing surface of the two adjacent honeycomb units and a tenon head matched and installed in the mortise groove.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] The cells are installed in the complete honeycomb holes of the honeycomb retainer, the honeycomb structure has high structural stability and compression resistance due to the unique geometric shape, and the cells can be effectively protected from impact damage.

[0010] The honeycomb retainer is composed of the aerogel separators, the cells are separated by the aerogel separators, the thermal runaway of the local single cell can be effectively prevented from spreading to the other adjacent cells due to the fireproof and flame-retardant function of the aerogel separators.

[0011] The complete honeycomb in which the battery cell is installed is surrounded by the edge honeycomb, and the phase change material is filled in the edge honeycomb, and the phase change material can absorb and release a large amount of latent heat in the phase change temperature range, so as to maintain the battery pack temperature basically constant and improve the working stability of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0013] Figure 1 is an explosion view of the power battery pack honeycomb pressure-resistant structure provided by the embodiments of the present application;

[0014] Figure 2 is a honeycomb unit connection schematic view of the present application;

[0015] Figure 3 is a honeycomb retainer structure schematic view;

[0016] 1, middle frame; 2, honeycomb retainer; 3, aerogel separator; 4, complete honeycomb; 5, edge honeycomb; 6, cylindrical battery cell; 7, phase change material; 8, end plate; 9, honeycomb unit; 10, tenon; 11, mortise. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0019] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0020] Referring to Figure 1 and Figure 2 A power battery pack honeycomb compression-resistant structure comprises a middle frame 1, a honeycomb holder 2 is matched and installed in the middle frame 1, the honeycomb holder 2 is composed of a plurality of aerogel separators 3, the honeycomb holder 2 comprises a plurality of complete honeycombs 4 and a plurality of edge honeycombs 5 arranged around the complete honeycombs 4, a cylindrical battery cell 6 is matched and installed in each complete honeycomb 4, and a phase change material 7 is filled in each edge honeycomb 5; and end plates for clamping the cylindrical battery cell 6 are fixedly installed at both ends of the middle frame 1. The phase change material 7 can be paraffin, and the aerogel separator 3 can be a silica nano-aerogel separator 3.

[0021] In the utility model, the battery cell is installed in the complete honeycomb 4 hole of the honeycomb holder 2, the honeycomb structure has high structural stability and compression resistance due to its unique geometric shape, and can effectively protect the battery cell from impact damage. The honeycomb holder 2 is composed of the aerogel separator 3, the battery cells are separated by the aerogel separator 3, and after local single battery cell thermal runaway, the aerogel separator 3 has the fireproof and flame-retardant function, thereby achieving the purpose of effectively avoiding the thermal runaway from spreading to other adjacent battery cells. The complete honeycomb 4 periphery where the battery cell is installed is surrounded by the edge honeycomb 5, and the phase change material 7 is filled in the edge honeycomb 5; the phase change material 7 can absorb and release a large amount of latent heat within its phase change temperature range, thereby maintaining the battery pack temperature basically constant and improving the working stability of the battery pack.

[0022] Referring to Figure 3In some embodiments, the honeycomb holder 2 is spliced by several honeycomb units, each of which is enclosed by six side plates, and two adjacent honeycomb units are connected through a mortise and tenon structure, which includes a mortise arranged on the splicing surface of the two adjacent honeycomb units and a tenon matched and installed in the mortise. In this embodiment, the honeycomb holder 2 is spliced by several honeycomb units through the mortise and tenon structure, when a single honeycomb unit is damaged, only the tenon needs to be pulled out, and the damaged honeycomb unit can be replaced, without the need to replace the whole honeycomb holder 2, so the maintenance cost is low. Any of the technical solutions disclosed in the utility model above, if not otherwise stated, if it discloses a numerical range, the numerical range disclosed is a preferred numerical range, and any person skilled in the art should understand that the preferred numerical range is only one of the many implementable numbers with more obvious technical effects or representative numbers. Because there are too many numbers, it is impossible to enumerate them, so the utility model only discloses part of the numbers to illustrate the technical solutions of the application, and the above-mentioned enumerated numbers should not constitute a limitation on the protection scope of the application.

[0023] At the same time, if the above-mentioned utility model discloses or involves mutually fixed and connected parts or structural members, except otherwise stated, the fixed connection can be understood as: detachable fixed connection (such as bolt or screw connection), and can also be understood as: non-detachable fixed connection (such as riveting, welding), of course, the mutual fixed connection can also be replaced by an integral structure (such as integrally formed by casting process) (except for obvious cases that cannot adopt integral forming process).

[0024] In addition, the terms used to represent the position relationship or shape in any of the technical solutions disclosed in the above-mentioned utility model include the approximate, similar or close state or shape, except otherwise stated. Any component provided by the utility model can be assembled by a plurality of individual components, or can be a single component manufactured by integral forming process.

[0025] The above-mentioned embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation modes. Based on the above-mentioned description, other different forms of changes or variations can also be made by those skilled in the art. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A honeycomb pressure-resistant structure for a power battery pack, characterized in that: The device includes a middle frame, within which a honeycomb retainer is fitted. The honeycomb retainer is composed of several aerogel partitions. The honeycomb retainer includes multiple complete honeycombs and multiple edge honeycombs arranged around the complete honeycombs. Each complete honeycomb is fitted with a cylindrical battery cell, and each edge honeycomb is filled with phase change material. The two ends of the middle frame are also provided with end plates to clamp the cylindrical battery cells.

2. The honeycomb compression-resistant structure of the power battery pack according to claim 1, characterized in that: The phase change material is paraffin.

3. The honeycomb compression-resistant structure of the power battery pack according to claim 1, characterized in that: The aerogel separator is a silica nano-aerogel separator.

4. The honeycomb compression-resistant structure of the power battery pack according to any one of claims 1-3, characterized in that: The honeycomb retainer is composed of several honeycomb units spliced ​​together. Each honeycomb unit is surrounded by six side plates. Two adjacent honeycomb units are connected by a mortise and tenon structure, which includes a tenon groove provided on the splicing surface of two adjacent honeycomb units and a tenon that is matched and installed in the tenon groove.

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