Battery cell heat insulation sheet of energy storage battery
By combining high-temperature resistant films and elastic components with nano-insulation sheets and honeycomb structure reinforcement plates, the problem of insufficient thermal insulation performance of energy storage battery cell insulation materials is solved, achieving efficient thermal management and battery safety protection.
Patent Information
- Application Number
- CN202520551992.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-24
- Estimated Expiration
- 2035-03-27
AI Technical Summary
The thermal insulation materials of existing energy storage battery cells have limited thermal insulation performance, making it difficult to meet the needs of high energy density batteries. Furthermore, they are prone to separation from the cells during charging and discharging, leading to a decrease in thermal insulation performance.
The high-temperature resistant film and elastic components are combined with nano heat insulation sheets. The high-temperature resistant film blocks heat transfer, the elastic components adapt to the expansion or contraction of the battery cell, and the honeycomb structure reinforcement plate enhances the heat insulation performance. The sliding groove and limiting plate ensure that the heat insulation sheet is stably attached to the outer wall of the battery cell.
It effectively blocks heat transfer, maintains continuous thermal insulation performance, prevents thermal runaway, improves battery safety and stability, and protects the battery cell from vibration and shock.
Smart Images
Figure CN224036462U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery cell heat insulation technical field especially relates to a kind of energy storage battery cell heat insulation sheet. BACKGROUND
[0002] With the rapid development of new energy industry, energy storage batteries are widely used in many fields, such as electric vehicles, distributed energy storage systems, etc. The performance, safety and stability of energy storage batteries are increasingly concerned. During battery operation, the cell will generate a large amount of heat due to charging and discharging. If effective heat management is not performed, the cell temperature will be too high, which will lead to battery performance degradation, shortened life, and even cause thermal runaway and safety accidents. Therefore, efficient cell heat insulation technology is a key factor to improve the performance and safety of energy storage batteries.
[0003] Currently, there are various heat insulation measures for energy storage battery cells in the prior art. Some use traditional heat insulation materials such as asbestos and glass fibers, but these materials have limited heat insulation performance and cannot meet the heat insulation needs of high-energy-density batteries. At the same time, during the charging and discharging process of the battery cell, it is easy to expand or shrink. During this process, most heat insulation sheets are easy to separate from the cell, resulting in a decrease in heat insulation performance. Therefore, there is an urgent need for an energy storage battery cell heat insulation sheet to solve the above problems. SUMMARY
[0004] The utility model aims at solving the shortcomings in the prior art and provides an energy storage battery cell heat insulation sheet. The advantages are that the deformation ability of the high-temperature-resistant film and the spring can effectively cooperate with the expansion or shrinkage of the battery cell during the charging and discharging process, so that the high-temperature-resistant film is always tightly attached to the outer wall of the cell, ensuring the persistence of heat insulation and buffering performance.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An energy storage battery cell heat insulation sheet includes a fixed frame, and the inside of the fixed frame is provided with a heat insulation assembly;
[0007] The inside of the fixed frame is provided with an elastic assembly for pressing the heat insulation assembly against the outer wall of the battery cell;
[0008] The heat insulation assembly includes a nano heat insulation sheet body, the outside of which is packaged with a high-temperature-resistant film made of polyimide material.
[0009] Through the above technical solutions: the high-temperature-resistant film can effectively block heat transfer, and it has good deformation ability, which can cooperate with the expansion and shrinkage of the cell during charging and discharging.
[0010] The utility model further sets up, two sides of nanometer heat insulation sheet body are provided with first reinforcing plate and second reinforcing plate respectively, first reinforcing plate and second reinforcing plate are all encapsulated in the inside of high temperature resistance film.
[0011] Through the above technical scheme: first reinforcing plate and second reinforcing plate enhance the structural strength of nanometer heat insulation sheet body, prevent heat insulation sheet from deforming and damaging in use, ensure that heat insulation performance is stable.
[0012] The utility model further sets up, first reinforcing plate and second reinforcing plate are all honeycomb structure.
[0013] Through the above technical scheme: the low thermal conductivity air and numerous honeycomb walls that are enclosed in honeycomb structure enhance heat insulation effect, effectively block heat conduction and heat radiation, realize high specific strength and rigidity with light structure simultaneously, reduce the overall weight of heat insulation sheet.
[0014] The utility model further sets up, the both sides inner wall of fixed frame all are seted up with the sliding slot, the inside sliding connection of sliding slot has sliding plate, sliding plate fixed connection is established in the bottom outer wall of high temperature resistance film.
[0015] Through the above technical scheme: guarantee high temperature resistance film always close to the outer wall of electric core, maintain the continuity of heat insulation and buffering performance.
[0016] The utility model further sets up, the both sides of fixed frame all are seted up with installation groove, the bottom inner wall of installation groove is connected with the limiting board through bolt fixed connection.
[0017] Through the above technical scheme: limiting board can prevent the over sliding of sliding plate, ensure the position stability of heat insulation assembly in fixed frame, guarantee the overall performance of heat insulation sheet.
[0018] The utility model further sets up, the width of limiting board is greater than the width of installation groove.
[0019] Through the above technical scheme: make limiting board can be stably fixed in installation groove, avoid its accidental drop, enhance the reliability of heat insulation sheet structure.
[0020] The utility model further sets up, the four outer walls of fixed frame are all connected with extension frame, and the four corners of extension frame are all seted up with positioning hole.
[0021] Through the above technical scheme: extension frame and positioning hole facilitate accurate installation and positioning of heat insulation sheet and battery electric core, ensure that heat insulation sheet is closely attached to electric core, and best heat insulation and buffering effect are played.
[0022] The utility model further sets up, the inner wall fixed connection of fixed frame has fixed plate, the upper and lower both sides of fixed plate all are fixedly connected with the spring of equal distance distribution, the one end of spring away from fixed plate is fixedly connected on the one side outer wall of sliding plate.
[0023] Through above technical scheme, the heat insulation sheet always adheres to the battery cell, realizes good buffering and heat insulation effect, and the elasticity of spring can also absorb vibration energy, protects the battery cell from vibration impact.
[0024] The utility model discloses the beneficial effect that:
[0025] In the utility model, the polyimide high temperature resistance film of the nanometer heat insulation sheet body outer package can block heat, and the first and second reinforcing plates of honeycomb structure are arranged on the two sides in the inside, and the low thermal conductivity air in the closed honeycomb and numerous honeycomb walls can effectively block heat conduction and heat radiation, improve the heat insulation performance, prevent heat transfer between the battery cell and other components, avoid the spread of thermal runaway, and ensure the uniform temperature of the battery pack.
[0026] In the utility model, the fixed frame is matched with the internal elastic component, can make the heat insulation component abut tightly on the outer wall of battery cell, and the high temperature resistance film and spring jointly act to realize good buffering effect, can protect the battery cell from vibration impact, and the reinforcing plate of honeycomb structure realizes high specific strength and rigidity under the condition of light weight, and improves the structural stability of heat insulation sheet.
[0027] The utility model discloses the deformation ability of high temperature resistance film and spring can effectively cooperate the expansion or shrinkage of battery cell in the process of charging and discharging, makes the high temperature resistance film always closely adhere to the outer wall of battery cell, guarantees the continuity of heat insulation and buffering performance. ACCOUT OF DRAWINGS
[0028] Figure 1 The utility model discloses a kind of overall structure schematic diagram of energy storage battery cell heat insulation sheet;
[0029] Figure 2 The utility model discloses a kind of overall half-section structure schematic diagram of energy storage battery cell heat insulation sheet;
[0030] Figure 3 The utility model discloses a kind of energy storage battery cell heat insulation sheet Figure 2 The utility model discloses a kind of energy storage battery cell heat insulation sheet
[0031] Figure 4 The utility model discloses a kind of energy storage battery cell heat insulation sheet of internal structure split schematic diagram.
[0032] In the figure: 1, fixed frame; 2, extension frame; 3, high-temperature-resistant film; 4, positioning hole; 5, limiting plate; 6, sliding groove; 7, sliding plate; 8, first reinforcing plate; 9, nanometer heat insulation sheet body; 10, second reinforcing plate; 11, fixed plate; 12, spring; 13, mounting groove. DETAILED DESCRIPTION
[0033] The technical solutions of the patent will be further described in detail below in combination with specific embodiments.
[0034] The embodiments of the patent will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the patent, and cannot be understood as a limitation on the patent.
[0035] In the description of the patent, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the patent and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the patent.
[0036] In the description of the patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meanings of the above terms in the patent can be understood according to the specific circumstances.
[0037] Reference Figures 1-4 A heat insulation sheet for energy storage battery cell, comprising a fixed frame 1, the inside of the fixed frame 1 is provided with a heat insulation assembly;
[0038] The inside of the fixed frame 1 is provided with an elastic assembly for abutting the heat insulation assembly against the outer wall of the battery cell;
[0039] The heat insulation assembly comprises a nano heat insulation sheet body 9, the outside of the nano heat insulation sheet body 9 is packaged with a high-temperature-resistant film 3, the high-temperature-resistant film 3 is made of polyimide material, the fixed frame 1 cooperates with the internal elastic assembly to provide stable support and reliable abutting force for the heat insulation assembly, meanwhile, the extension frame 2 and the positioning hole 4 on the fixed frame 1 facilitate the installation and fixation of the heat insulation sheet on the outer wall of the battery cell, and ensure the overall stability, and the nano heat insulation sheet body 9 in the heat insulation assembly is externally provided with the polyimide high-temperature-resistant film 3, the heat transfer can be effectively blocked through the high-temperature-resistant film 3, and the high-temperature-resistant film 3 has good deformation capacity and can cooperate with the expansion and contraction of the battery cell during charging and discharging.
[0040] In order to ensure the strength of the whole heat insulation sheet, referring to Figures 2-3 , the nano heat insulation sheet body 9 is provided with a first reinforcing plate 8 and a second reinforcing plate 10 on both sides, the first reinforcing plate 8 and the second reinforcing plate 10 are both packaged inside the high-temperature-resistant film 3, the first reinforcing plate 8 and the second reinforcing plate 10 enhance the structural strength of the nano heat insulation sheet body 9, prevent the heat insulation sheet from deforming and damaging in use, and ensure the stability of the heat insulation performance.
[0041] In order to make the heat insulation sheet have good heat insulation effect and light weight, referring to Figure 4 , the first reinforcing plate 8 and the second reinforcing plate 10 are both honeycomb structures, the low-thermal-conductivity air and numerous honeycomb walls enclosed in the honeycomb structure enhance the heat insulation effect, effectively block heat conduction and heat radiation, and realize high specific strength and rigidity with light structure, thereby reducing the overall weight of the heat insulation sheet.
[0042] In order to ensure that the high-temperature-resistant film 3 is always closely attached to the outer wall of the battery cell, referring to Figures 2-3 , the inner walls of both sides of the fixed frame 1 are provided with sliding grooves 6, the sliding grooves 6 are internally and slidably connected with sliding plates 7, the sliding plates 7 are fixedly connected to the bottom outer wall of the high-temperature-resistant film 3, the sliding plates 7 slide in the sliding grooves 6, so that the heat insulation assembly can flexibly adapt to the expansion or contraction of the battery cell, ensure that the high-temperature-resistant film 3 is always closely attached to the outer wall of the battery cell, and maintain the persistence of the heat insulation and buffering performance.
[0043] In order to play a good limiting role on the sliding plate 7, referring to Figures 2-4 , the two sides of the fixed frame 1 are provided with installation grooves 13, the bottom inner wall of the installation grooves 13 is fixedly connected with limiting plates 5 through bolts, the limiting plates 5 can prevent the sliding plate 7 from sliding excessively, ensure the position stability of the heat insulation assembly in the fixed frame 1, and protect the overall performance of the heat insulation sheet.
[0044] In order to avoid the accidental falling of the sliding plate 7 and facilitate the installation of the whole heat insulation sheet, referring to Figure 1 , Figure 3 , the width of the limiting plate 5 is greater than the width of the installation groove 13, this design enables the limiting plate 5 to be stably fixed in the installation groove 13, avoids accidental falling, and enhances the reliability of the structure of the heat insulation sheet.
[0045] In order to ensure that the heat insulation sheet closely fits the battery cell, with reference to Figure 1 The four outer walls of the fixed frame 1 are fixedly connected with extension frames 2, and positioning holes 4 are formed at the four corners of the extension frames 2. The extension frames 2 and the positioning holes 4 facilitate accurate installation and positioning of the heat insulation sheet and the battery cell, ensure that the heat insulation sheet closely fits the battery cell, and play the best heat insulation and buffering effect.
[0046] In order to enable the heat insulation sheet to always closely adhere to the outer wall of the battery cell during charging and discharging of the battery cell, with reference to Figures 3-4 The inner wall of the fixed frame 1 is fixedly connected with a fixed plate 11, and the upper and lower sides of the fixed plate 11 are fixedly connected with springs 12 distributed at equal distances. One end of the spring 12 away from the fixed plate 11 is fixedly connected to the outer wall of one side of the sliding plate 7. The spring 12 provides elastic force to push the sliding plate 7 and the heat insulation assembly to closely abut against the outer wall of the battery cell. During expansion and contraction of the battery cell during charging and discharging, the deformation of the spring 12 cooperates with the high-temperature-resistant film 3 to enable the heat insulation sheet to always fit the battery cell, achieve good buffering and heat insulation effect, and the elasticity of the spring 12 can also absorb vibration energy to protect the battery cell from vibration impact.
[0047] Working principle: when in use, the entire heat insulation sheet can be fixedly connected to the outer wall of the battery cell through the positioning holes 4 of the four sides of the extension frame 2, thereby playing a good heat insulation effect, preventing heat transfer between battery cells and between the battery cell and other components, avoiding heat spread, ensuring uniform temperature of the battery pack, improving safety, and through the combined action of the high-temperature-resistant film 3 and the spring 12, also playing a good buffering effect. Through the deformation ability of the high-temperature-resistant film 3 and the spring 12, the expansion or contraction of the battery cell during charging and discharging can be effectively matched, the high-temperature-resistant film 3 can always be closely attached to the outer wall of the battery cell, and through the honeycomb structure of the first reinforcing plate 8 and the second reinforcing plate 10 arranged inside the high-temperature-resistant film 3, the low-thermal-conductivity air in the closed honeycomb and the numerous honeycomb walls effectively block heat conduction and heat radiation, further improving the temperature insulation performance of the entire heat insulation sheet. It realizes high specific strength, stiffness and good buffering effect with a lightweight structure, the hollow design of the first reinforcing plate 8 and the second reinforcing plate 10 reduces the weight of the heat insulation sheet, and in terms of air circulation and heat dissipation, it can guide the orderly flow of air and uniform heat dissipation, optimize the thermal management of the battery system, and comprehensively improve the performance of the heat insulation sheet and the overall performance of the battery system.
[0048] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A heat insulation sheet for an energy storage battery cell, comprising a fixing frame (1), characterized in that, The fixed frame (1) is equipped with a heat insulation component inside; The fixed frame (1) is provided with an elastic component for pressing the heat insulation component against the outer wall of the battery cell; The heat insulation component includes a nano heat insulation sheet body (9), and the outside of the nano heat insulation sheet body (9) is encapsulated with a high temperature resistant film (3), which is made of polyimide material.
2. The heat insulation sheet for an energy storage battery cell according to claim 1, characterized in that, The nano heat insulation sheet body (9) is provided with a first reinforcing plate (8) and a second reinforcing plate (10) on both sides, and the first reinforcing plate (8) and the second reinforcing plate (10) are both encapsulated inside the high temperature resistant film (3).
3. The heat insulation sheet for an energy storage battery cell according to claim 2, characterized in that, Both the first reinforcing plate (8) and the second reinforcing plate (10) are honeycomb structures.
4. The heat insulation sheet for an energy storage battery cell according to claim 3, characterized in that, The inner walls on both sides of the fixed frame (1) are provided with sliding grooves (6), and a sliding plate (7) is slidably connected inside the sliding groove (6). The sliding plate (7) is fixedly connected to the bottom outer wall of the high temperature resistant film (3).
5. A heat insulation sheet for an energy storage battery cell according to claim 4, characterized in that, The fixed frame (1) has mounting grooves (13) on both sides, and the bottom inner wall of the mounting groove (13) is fixedly connected to a limiting plate (5) by bolts.
6. The heat insulation sheet for an energy storage battery cell according to claim 5, characterized in that, The width of the limiting plate (5) is greater than the width of the mounting groove (13).
7. A heat insulation sheet for an energy storage battery cell according to claim 6, characterized in that, The four outer walls of the fixed frame (1) are all fixedly connected with extension frames (2), and positioning holes (4) are provided at the four corners of the extension frames (2).
8. A heat insulation sheet for an energy storage battery cell according to claim 7, characterized in that, The inner wall of the fixed frame (1) is fixedly connected to a fixed plate (11), and the upper and lower sides of the fixed plate (11) are fixedly connected to springs (12) distributed at equal distances. The end of the spring (12) away from the fixed plate (11) is fixedly connected to the outer wall of one side of the slide plate (7).