Buffer material structure with high compression stress and heat insulation effect between battery cells
A cushion material with a base layer and glass fiber insulation addresses the safety and thermal insulation issues of battery cells by maintaining structural integrity and reducing thermal radiation, offering enhanced safety and cost-efficiency.
Patent Information
- Application Number
- CN202422151334.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The traditional inter-cell buffer liner cannot be flame retardant and heat-insulated under high compression stress, which is prone to damage, resulting in safety hazards and high cost.
A buffer material structure is designed, including a substrate, through-hole, upper and lower surface treatment layer and adhesive layer. The substrate material is made of silicone rubber or PC sheet, and the through-hole is arranged vertically. A heat insulation layer is provided on the surface treatment layer to enhance compression stress and heat insulation effect.
It achieves good thermal insulation performance under high compression stress, reduces material costs, improves safety and sticking firmness, simple structure and low cost.
Smart Images
Figure CN223109133U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a buffer material, in particular to a buffer material structure for use between battery cells with high compressive stress and heat insulation effect. Background Technique
[0002] Generally, buffer cushion materials need to be arranged between multiple battery cells in a power battery pack to buffer the mutual collision between the battery cells or absorb the tolerance generated by the expansion caused by the charge and discharge of the battery cells. The buffer cushion plays a very important role in the safety of the battery. The buffer cushions between the traditional solid-state battery cells are mostly ordinary foams. Such buffer cushions cannot be flame-retardant and heat-insulating under high compressive stress. At the same time, a pre-tightening force is required between the battery cells, and the foam is easily damaged during bumpy processes. When the battery cells experience thermal runaway due to high power or other reasons, it is easy to trigger safety accidents. And using a buffer cushion with fireproof performance not only greatly increases the product cost, but also the flame-retardant and heat-insulating performance is difficult to meet the requirements. For this reason, the inventor designed a buffer material for use between battery cells with high compressive stress and heat insulation effect. Content of the Utility Model
[0003] The purpose of the utility model is to provide a buffer material structure for use between battery cells with high compressive stress and heat insulation effect, which has the advantages of simple structure, reasonable design, low manufacturing cost, good buffering performance, and at the same time has high compressive stress and can isolate heat radiation, and solves the problems raised in the above technical background.
[0004] To achieve the above purpose, the utility model provides the following technical solution: a buffer material structure for use between battery cells with high compressive stress and heat insulation effect, including a substrate with a thickness value of 2 mm. Through holes are penetrated in the substrate, and an upper surface treatment layer and a lower surface treatment layer are respectively arranged on the upper and lower end faces of the substrate. An upper adhesive layer and a lower adhesive layer are respectively attached to the end faces of the upper surface treatment layer and the lower surface treatment layer far away from the substrate. Heat insulation layers are arranged on both the upper adhesive layer and the lower adhesive layer.
[0005] Preferably, the material of the substrate is silicone rubber or PC sheet or epoxy board.
[0006] Preferably, a plurality of through holes are provided, and the plurality of through holes are evenly distributed on the substrate, and the plurality of through holes are perpendicular to the substrate.
[0007] Preferably, the thickness values of both the upper surface treatment layer and the lower surface treatment layer are between 0.005 mm and 0.05 mm.
[0008] Preferably, the thickness values of the upper adhesive layer and the lower adhesive layer are between 0.05 mm and 0.15 mm, and the upper adhesive layer and the lower adhesive layer are double-sided adhesives.
[0009] Preferably, the thickness value of the heat insulation layer is between 0.15 mm and 0.25 mm, and the heat insulation layer is made of fiberglass.
[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0011] 1. The present utility model provides a buffer material structure for between battery cells with high compressive stress and heat insulation effect. The overall structure of the buffer material is simple and reasonably designed. By vertically arranging a plurality of through holes on the substrate, the purpose of setting the through holes is to increase the prestress of the substrate, making the stress range smoother. When it is applied to battery cells, the safety performance is better. By respectively arranging an upper surface treatment layer and a lower surface treatment layer on the upper and lower end surfaces of the substrate, the adhesion between the upper adhesive layer and the lower adhesive layer and the substrate is more firm. By arranging a heat insulation layer on the upper adhesive layer and the lower adhesive layer, the heat insulation layer is made of fiberglass, which can block the radiation of heat. The substrate in the present utility model is made of silicone material and provided with through holes, greatly reducing the material cost and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a cross-sectional view of the present utility model;
[0013] Figure 2 is a schematic diagram of the resilience of the substrate with and without through holes of the present utility model;
[0014] Figure 3 is a heat insulation effect diagram of the substrate with and without through holes of the present utility model.
[0015] The reference numerals and names in the drawings are as follows:
[0016] 1. Substrate; 2. Through hole; 3. Upper surface treatment layer; 4. Lower surface treatment layer; 5. Upper adhesive layer; 6. Lower adhesive layer; 7. Heat insulation layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0018] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present utility model and for simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.
[0019] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0020] Please refer to Figure 1 , an embodiment provided by the present utility model: a buffer material structure between battery cells with high compressive stress and heat insulation effect, including a substrate 1 with a thickness value of 2 mm. The material of the substrate 1 is silicone rubber or PC sheet or epoxy board, and in this embodiment, the material is silicone rubber. Through holes 2 are provided through the substrate 1. There are a plurality of the through holes 2, and the plurality of through holes 2 are evenly distributed on the substrate 1, and the plurality of through holes 2 are arranged perpendicular to the substrate 1. The purpose of providing the through holes 2 is to increase the prestress of the substrate 1, making the stress range smoother. When applied to battery cells, the safety performance is better. Upper surface treatment layers 3 and lower surface treatment layers 4 are respectively provided on the upper and lower end surfaces of the substrate 1. Upper adhesive layers 5 and lower adhesive layers 6 are respectively pasted on the end surfaces of the upper surface treatment layer 3 and the lower surface treatment layer 4 far from the substrate 1. Heat insulation layers 7 are provided on both the upper adhesive layer 5 and the lower adhesive layer 6. The thickness value of the heat insulation layer 7 is between 0.15 mm and 0.25 mm, and the heat insulation layer 7 is made of glass fiber, and the glass fiber can block the radiation of heat to achieve the heat insulation effect.
[0021] Specifically, the thickness values of the upper surface treatment layer 3 and the lower surface treatment layer 4 are both between 0.005 mm and 0.05 mm, and the upper surface treatment layer 3 and the lower surface treatment layer 4 are silicone treatment agents, which are mainly used to treat the surface of the substrate 1 so that the substrate 1 can be quickly pasted together with the upper adhesive layer 5 and the lower adhesive layer 6. In this embodiment, the main component of the silicone treatment agent is a silane coupling agent.
[0022] Specifically, the thickness values of the upper adhesive layer 5 and the lower adhesive layer 6 are between 0.05 mm and 0.15 mm, and the upper adhesive layer 5 and the lower adhesive layer 6 are double-sided adhesives.
[0023] Please refer to Figure 2 and Figure 3 , by adopting the above technical solution, a plurality of through holes 2 are penetrated in the above-mentioned substrate 1. When the buffer material is installed between the battery cells, with the same compression stroke, the buffer material with through holes 2 has stronger compression stress, and at the same time, the buffer material with through holes 2 has better heat insulation effect than the buffer material without through holes 2.
[0024] Please refer to again Figure 1 , the buffer material in the present invention has a simple structure and reasonable design. By opening a plurality of through holes 2 in the substrate 1, the through holes 2 can be formed by stamping in one time, and the manufacturing cost is low. In combination with Figure 2 and Figure 3 , it can be seen that the buffer material with through holes 2 has good high compression stress and heat radiation isolation effect, and is worthy of being vigorously promoted and applied.
[0025] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.
Claims
1. The buffer material structure for between battery cells with high compressive stress and heat insulation effect, characterized in that: It includes a substrate (1) with a thickness of 2 mm. Through holes (2) are penetrated through the substrate (1), and an upper surface treatment layer (3) and a lower surface treatment layer (4) are respectively arranged on the upper and lower end faces of the substrate (1). An upper adhesive layer (5) and a lower adhesive layer (6) are respectively pasted on one end faces of the upper surface treatment layer (3) and the lower surface treatment layer (4) far away from the substrate (1). Heat insulation layers (7) are arranged on both the upper adhesive layer (5) and the lower adhesive layer (6).
2. The buffer material structure between battery cells with high compressive stress and heat insulation effect according to claim 1, characterized in that: The material of the substrate (1) is silicone rubber or PC sheet or epoxy board.
3. The buffer material structure between battery cells with high compressive stress and heat insulation effect according to claim 1, characterized in that: A plurality of the through holes (2) are provided, and the plurality of through holes (2) are evenly distributed on the substrate (1), and the plurality of through holes (2) are vertically arranged with respect to the substrate (1).
4. The buffer material structure between battery cells with high compressive stress and heat insulation effect according to claim 1, characterized in that: The thickness values of the upper surface treatment layer (3) and the lower surface treatment layer (4) are both between 0.005 mm and 0.05 mm.
5. The buffer material structure between battery cells with high compression stress and heat insulation effect according to claim 1, characterized in that: The thickness values of the upper adhesive layer (5) and the lower adhesive layer (6) are between 0.05 mm and 0.15 mm, and the upper adhesive layer (5) and the lower adhesive layer (6) are double-sided adhesives.
6. The buffer material structure between battery cells with high compressive stress and heat insulation effect according to claim 1, characterized in that: The thickness value of the heat insulation layer (7) is between 0.15 mm and 0.25 mm, and the heat insulation layer (7) is made of glass fiber.