Lightweight and high electromagnetic shielding plate and battery shell

Abstract

The utility model discloses a kind of light weight and high electromagnetic shielding panel and battery shell, belong to battery shell material technical field, including heat-resistant plate;Heat-resistant plate top is fixedly connected with square sealing layer;Sealing layer inner wall is fixedly connected with the protective layer for protection;Protective layer inner wall is fixedly connected with heat-resistant plate layer, and heat-resistant plate layer and protective layer bottom are all fixedly connected with heat-resistant plate top;Heat-resistant plate layer top is equipped with the glue coating channel for structure glue coating at equal intervals, and glue coating channel is coated with structure glue layer;Phase-change material layer mounting groove is opened at equal intervals between glue coating channel in heat-resistant plate layer;Phase-change material layer mounting groove is inserted with phase-change material layer;Structure glue layer top is bonded with metal woven mesh layer;Metal woven mesh layer top is attached with composite layer.The utility model heat-resistant plate and composite layer form heat buffer zone between, gaseous phase-change material layer carries out gaseous heat transfer, gaseous heat transfer reduces heat outward transmission efficiency, help to improve safety.

Description

Technical Field

[0001] This utility model relates to the field of battery casing material technology, specifically to a lightweight and highly electromagnetically shielded plate and battery casing. Background Technology

[0002] With the development of new energy electric vehicle technology, represented by lithium batteries, the application of electric propulsion in the aviation field has become inevitable.

[0003] Unlike existing onboard power battery systems used in new energy vehicles, aviation electric propulsion systems that use aviation power battery systems as their power source have the following strong requirements for batteries, specifically reflected in the following aspects:

[0004] 1. Extremely high security requirements;

[0005] 2. Extremely high requirements for lightweight design;

[0006] 3. Extremely high electromagnetic shielding requirements.

[0007] Currently, the materials used for battery casings do not meet the above requirements.

[0008] Based on this, the present invention designs a lightweight and highly electromagnetically shielded plate and battery casing to solve the above problems. Utility Model Content

[0009] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a lightweight and highly electromagnetically shielded plate and battery casing.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A lightweight and highly electromagnetically shielded sheet material, comprising a heat-resistant sheet;

[0012] A square sealing layer is fixedly connected to the top of the heat-resistant plate;

[0013] A protective layer for protection is fixedly connected to the inner wall of the sealing layer;

[0014] A heat-resistant plate layer is fixedly connected to the inner wall of the protective layer, and both the heat-resistant plate layer and the bottom of the protective layer are fixedly connected to the top of the heat-resistant plate.

[0015] The top of the heat-resistant board layer is provided with glue application channels at equal intervals for structural adhesive application, and the glue application channels are coated with a structural adhesive layer.

[0016] The heat-resistant board layer has equally spaced grooves for installing the phase change material layer between the glue coating channels;

[0017] A phase change material layer is inserted into the phase change material layer mounting slot;

[0018] A metal woven mesh layer is bonded to the top of the structural adhesive layer;

[0019] A composite layer is attached to the top of the metal woven mesh layer.

[0020] Furthermore, the protective layer is a conductive foam layer.

[0021] Furthermore, the adhesive application channel consists of two sets of auxiliary adhesive overflow channels, a main adhesive overflow channel, and multiple sets of guide channels. The two sets of auxiliary adhesive overflow channels, the main adhesive overflow channel, and the multiple sets of guide channels are all located on the top of the heat-resistant board layer. The two sets of auxiliary adhesive overflow channels are located on both sides of the main adhesive overflow channel, and the multiple sets of guide channels are symmetrically spaced on both sides of the main adhesive overflow channel. The auxiliary adhesive overflow channels, the main adhesive overflow channel, and the guide channels are interconnected.

[0022] Furthermore, the composite layer is a carbon fiber composite material layer.

[0023] Furthermore, the sealing layer is a sealing foam layer.

[0024] A battery casing made of lightweight and highly electromagnetically shielded material.

[0025] Beneficial effects

[0026] In this invention, when a battery cell experiences accidental thermal runaway and ejects high-temperature ejected material onto a heat-resistant plate, the heat is transferred to the heat-resistant plate. The heat-resistant plate then transfers the heat to the phase change material layer within the phase change material layer mounting groove. Upon heating, the phase change material layer undergoes a phase change, becoming gaseous and absorbing heat, expanding in volume. Simultaneously, the structural adhesive layer softens at high temperatures. Under the expansion force of the phase change material layer, the structural adhesive layer separates from the adhesive overflowing from the auxiliary settling groove, the main settling groove, and the guide groove. This expansion force causes the heat-resistant plate and the composite layer to separate, forming a heat buffer zone between them. The gaseous phase change material layer facilitates gaseous heat transfer, reducing the efficiency of heat transfer outwards and contributing to improved safety. Except for the metal woven mesh layer, the entire structure uses non-metallic materials to meet weight requirements. Furthermore, the metal woven mesh layer and the protective layer work together to form a closed metal shielding layer, which helps improve electromagnetic shielding performance. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of a lightweight and highly electromagnetically shielded sheet material according to the present invention.

[0029] Figure 2 This is an exploded view of a lightweight and highly electromagnetically shielded material according to this utility model.

[0030] Figure 3 This is a top view of a lightweight and highly electromagnetically shielded sheet material according to the present invention;

[0031] Figure 4 For along Figure 3 A partial sectional view along the AA direction;

[0032] Figure 5 This is a schematic diagram of the heat-resistant plate structure;

[0033] Figure 6 for Figure 5 Enlarged view of the structure at point B.

[0034] The labels in the diagram represent:

[0035] 1. Composite layer 2. Metal woven mesh layer 3. Phase change material layer 4. Structural adhesive layer 5. Heat-resistant board layer 6. Protective layer 7. Sealing layer 8. Phase change material layer mounting groove 9. Glue overflow auxiliary sink 10. Glue main sink 11. Heat-resistant board 12. Guide groove. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0037] The present invention will be further described below with reference to the embodiments.

[0038] In some embodiments, please refer to Figure 1-6 A lightweight and highly electromagnetically shielded material, comprising a heat-resistant plate 11;

[0039] A square sealing layer 7 is fixedly connected to the top of the heat-resistant plate 11;

[0040] A protective layer 6 for protection is fixedly connected to the inner wall of the sealing layer 7;

[0041] The inner wall of the protective layer 6 is fixedly connected to the heat-resistant plate layer 5, and the bottom of both the heat-resistant plate layer 5 and the protective layer 6 are fixedly connected to the top of the heat-resistant plate 11.

[0042] The top of the heat-resistant board layer 5 is provided with glue application channels for structural adhesive application at equal intervals, and the glue application channels are coated with structural adhesive layer 4.

[0043] The heat-resistant plate layer 5 has phase change material layer mounting grooves 8 at equal intervals between the glue coating channels;

[0044] A phase change material layer 3 is inserted into the phase change material layer mounting slot 8;

[0045] The top of the structural adhesive layer 4 is bonded with a metal woven mesh layer 2;

[0046] The top of the metal woven mesh layer 2 is bonded with the composite layer 1.

[0047] Protective layer 6 is a conductive foam layer.

[0048] The adhesive application channel consists of two sets of adhesive overflow auxiliary sinks 9, an adhesive main sink 10, and multiple sets of guide channels 12. The two sets of adhesive overflow auxiliary sinks 9, the adhesive main sink 10, and the multiple sets of guide channels 12 are all located on the top of the heat-resistant plate layer 5. The two sets of adhesive overflow auxiliary sinks 9 are located on both sides of the adhesive main sink 10, and the multiple sets of guide channels 12 are symmetrically spaced on both sides of the adhesive main sink 10. The adhesive overflow auxiliary sinks 9, the adhesive main sink 10, and the guide channels 12 are interconnected.

[0049] If the auxiliary sink 9 and guide 12 for glue overflow are not designed, less structural adhesive will be applied to avoid glue overflow in the main sink 10, and the main sink 10 will not be able to be completely filled with structural adhesive.

[0050] Structural adhesive is applied to the main adhesive settling tank 10. Excess structural adhesive overflows through the guide channel 12 into the adhesive overflow auxiliary settling tank 9, which helps to completely fill the main adhesive settling tank 10 with structural adhesive.

[0051] Composite layer 1 is a carbon fiber composite material layer.

[0052] Sealing layer 7 is a sealing foam layer.

[0053] Metal braided mesh layer 2 is made of copper braided mesh layer;

[0054] When a battery cell experiences accidental thermal runaway, it ejects high-temperature jets onto the heat-resistant plate 11, transferring heat to the plate. The heat-resistant plate 11 then transfers the heat to the phase change material layer 3 within the phase change material layer mounting groove 8. The phase change material layer 3 undergoes a phase change upon heating, becoming gaseous and absorbing heat, thus expanding in volume. Simultaneously, the structural adhesive layer 4 softens under high temperature. Under the expansion force of the phase change material layer 3, the structural adhesive layer 4 separates from the adhesive overflow auxiliary sink 9, the main adhesive sink 10, and the guide groove 12. This expansion force causes the heat-resistant plate 11 and the composite layer 1 to separate, forming a heat buffer zone between them. The gaseous phase change material layer 3 then transfers gaseous heat, reducing the efficiency of heat transfer outwards and improving safety. Except for the metal braided mesh layer 2, the above structure uses non-metallic materials to meet weight requirements. Furthermore, the metal braided mesh layer 2 and the protective layer 6 work together to form a closed metal shielding layer, which helps improve electromagnetic shielding performance.

[0055] Example 2: A battery casing made of lightweight and highly electromagnetically shielded material.

[0056] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lightweight and highly electromagnetically shielded sheet material, comprising a heat-resistant sheet (11), characterized in that: A square sealing layer (7) is fixedly connected to the top of the heat-resistant plate (11); The inner wall of the sealing layer (7) is fixedly connected with a protective layer (6) for protection; The inner wall of the protective layer (6) is fixedly connected to the heat-resistant plate layer (5), and the bottom of the heat-resistant plate layer (5) and the protective layer (6) are both fixedly connected to the top of the heat-resistant plate (11); The heat-resistant board layer (5) has glue coating channels at equal intervals on the top for structural adhesive coating, and the glue coating channels are coated with structural adhesive layer (4). The heat-resistant plate layer (5) has phase change material layer mounting grooves (8) evenly spaced between the glue coating channels; A phase change material layer (3) is inserted into the phase change material layer mounting groove (8); The top of the structural adhesive layer (4) is bonded with a metal woven mesh layer (2); The metal woven mesh layer (2) has a composite layer (1) attached to its top.

2. The lightweight and high electromagnetic shielding material according to claim 1, characterized in that, The protective layer (6) is a conductive foam layer.

3. The lightweight and high electromagnetic shielding material according to claim 2, characterized in that, The glue coating channel consists of two sets of glue overflow auxiliary sinks (9), glue main sink (10) and multiple sets of guide channels (12). The two sets of glue overflow auxiliary sinks (9), glue main sink (10) and multiple sets of guide channels (12) are all opened on the top of the heat-resistant plate layer (5). The two sets of glue overflow auxiliary sinks (9) are located on both sides of the glue main sink (10). Multiple sets of guide channels (12) are symmetrically spaced on both sides of the glue main sink (10). The glue overflow auxiliary sinks (9), glue main sink (10) and guide channels (12) are connected.

4. The lightweight and high electromagnetic shielding material according to claim 3, characterized in that, The composite layer (1) is a carbon fiber composite material layer.

5. The lightweight and high electromagnetic shielding material according to claim 4, characterized in that, The sealing layer (7) is a sealing foam layer.

6. A battery casing, characterized in that, It is made of the lightweight and high electromagnetic shielding material as described in any one of claims 1-5.

Images