Heat insulation film structure, battery pack and vehicle

Abstract

The embodiment of the utility model provides a heat insulation film structure, a battery pack and a vehicle. Relates to the technical field of battery pack accessories, the heat insulation film structure comprises a supporting assembly, the supporting assembly comprises at least two supporting pieces and at least two connecting pieces, the two supporting pieces are connected end to end through the two connecting pieces so as to jointly define a heat insulation cavity, and a heat insulation layer is arranged in the heat insulation cavity; and the heat insulation layer is used for abutting between two adjacent battery cells in the battery pack. By means of the mode that the at least two supporting pieces are connected end to end, during production, only the two supporting pieces need to be cut on raw materials and connected, waste of the raw materials is little in the process, the utilization rate of the raw materials is increased, and meanwhile cost reduction is facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to battery pack accessory technology, in particular to a heat insulation film structure, a battery pack and a vehicle. BACKGROUND

[0002] In recent years, the electric vehicle industry has developed rapidly. As an important part of electric vehicles, the battery pack not only relates to the performance and safety of electric vehicles, but also directly affects the market competitiveness and sustainable development of electric vehicles.

[0003] In the related art, the battery pack includes a plurality of battery cells. In order to reduce the risk of thermal runaway and fire of the battery pack, a heat insulation film is arranged between two adjacent battery cells. The heat insulation film includes a support frame. A heat insulation layer can be arranged in the support frame to block the heat conduction between the two adjacent battery cells. Alternatively, the support frame can directly form an air partition to prevent heat conduction.

[0004] However, when producing the support frame, the support frame needs to be cut and shaped integrally from a raw material plate. The raw material at the position of the heat insulation layer needs to be cut off, which consumes a large amount of raw material and results in low utilization rate of the raw material. UTILITY MODEL CONTENT

[0005] Therefore, the application provides a heat insulation film structure, a battery pack and a vehicle, which aims to reduce the raw material consumption of the heat insulation film and improve the utilization rate of the raw material.

[0006] To achieve the above-mentioned purpose, the application provides a heat insulation film structure, a battery pack and a vehicle, which adopts the following technical solutions:

[0007] In a first aspect, the application provides a heat insulation film structure, comprising:

[0008] a support assembly;

[0009] The support assembly comprises at least two support pieces and at least two connecting pieces. The two support pieces are connected end to end through the two connecting pieces to jointly enclose a heat insulation cavity. The heat insulation cavity is used for arranging a heat insulation layer, and the heat insulation layer is used for abutting between two adjacent battery cells in the battery pack.

[0010] In a possible implementation manner, the support piece comprises two support strips. One end of the two support strips is connected. The other end of one support strip in one support piece and one support strip in another support piece have a mounting spacing. The connecting piece is located in the mounting spacing.

[0011] The two support strips in the same support piece have an included angle.

[0012] In a possible implementation manner, the connecting piece is a filling glue.

[0013] In a possible implementation, the heat insulation film structure provided in the present application further comprises two release components.

[0014] The release component comprises an adhesive layer and a release paper arranged on the adhesive layer, and each of the support members is covered with the same adhesive layer on opposite sides.

[0015] In a possible implementation, the heat insulation film structure provided in the present application is characterized in that the edge of the adhesive layer is located outside the support member.

[0016] In a possible implementation, the heat insulation film structure provided in the present application is characterized in that the release paper has at least one hand-tearable part.

[0017] The hand-tearable part protrudes from the release paper.

[0018] In a possible implementation, the heat insulation film structure provided in the present application is characterized in that the thickness of the adhesive layer is 0.95-1.15 mm.

[0019] In a possible implementation, the heat insulation film structure provided in the present application is characterized in that the thickness of the support member is the same as the thickness of the heat insulation layer.

[0020] In a second aspect, the present application provides a battery pack comprising the heat insulation film structure and at least two battery cells.

[0021] The heat insulation film structure is arranged between the two battery cells.

[0022] In a third aspect, the present application provides a vehicle comprising a vehicle body and the battery pack, wherein the battery pack is arranged on the vehicle body.

[0023] The heat insulation film structure provided in the present application comprises a support assembly, which comprises at least two support members and at least two connecting members. The two support members are connected end to end through the two connecting members to jointly enclose a heat insulation cavity. A heat insulation layer is arranged in the heat insulation cavity and is used to abut between two adjacent battery cells in a battery pack. By arranging the two support members to be connected end to end, only two support members need to be cut from the raw material and connected during production, which reduces the waste of raw materials, improves the utilization rate of raw materials, and helps to reduce costs.

[0024] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features, other technical problems solved by the technical solutions provided in the present application, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0025] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0026] Figure 1 A partial structural schematic diagram of the heat insulation film structure provided in this application;

[0027] Figure 2 for Figure 1 Another structural diagram from a different perspective;

[0028] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0029] Figure 4 for Figure 3 A magnified structural diagram of part B in the middle section;

[0030] Figure 5 An exploded structural diagram of the heat insulation membrane structure provided in this application;

[0031] Figure 6 A schematic diagram of the template structure cut from the raw material for the support component provided in this application;

[0032] Figure 7 This is a schematic diagram of a template structure for a support frame cut from raw materials in related technologies.

[0033] Figure label:

[0034] 10. Insulation film structure; 20. Foam board; 30. Support frame;

[0035] 100. Supporting components; 101. Insulation cavity;

[0036] 200. Support component; 210. Support bar;

[0037] 300. Connectors;

[0038] 400 Release component; 410 Adhesive layer; 420 Release paper; 430 Tear-off section.

[0039] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0040] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be combined with the drawings of the preferred embodiments of the present application to make the technical solutions in the embodiments of the present application more clearly described. In the drawings, the same or similar notations represent the same or similar parts or parts having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0041] In the description of the embodiments of the present application, it should be noted that, unless explicitly defined and limited, the terms "mount", "connect", "connect" should be understood in a broad sense, for example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the description of the embodiments of the present application, it should be understood that the terms "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" 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 do not indicate or imply 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 a limitation of the present application.

[0043] In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0044] The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a particular order or sequence.

[0045] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0046] In recent years, the electric vehicle industry has developed rapidly. As an important component of electric vehicles, the battery pack not only affects the performance and safety of electric vehicles, but also directly impacts their market competitiveness and sustainable development.

[0047] In related technologies, battery packs include multiple cells. During use, existing battery packs pose a significant safety hazard of thermal runaway and fire, seriously threatening the lives of passengers. To reduce the risk of thermal runaway and fire in battery packs, a heat insulation film is installed between two adjacent cells. The heat insulation film can block the spread of heat and prevent heat concentration.

[0048] The heat insulation film consists of a support frame and a heat insulation layer set inside the support frame. To ensure the heat insulation effect, the internal contour dimensions of the support frame usually need to match the external contour dimensions of the heat insulation layer. This requires higher manufacturing precision for both the support frame and the heat insulation layer, increasing the difficulty of operation. In case of mismatch, it may even lead to waste of parts.

[0049] As mentioned in the background section, when producing the support frame, it needs to be cut from the raw material plate as a whole. The raw material at the position of the heat insulation layer needs to be cut off, which consumes a lot of raw materials and results in low raw material utilization.

[0050] To address the aforementioned technical issues, the heat insulation film structure provided in this application includes a support assembly. The support assembly comprises at least two support members and at least two connecting members. The two support members are connected end-to-end via the two connecting members to jointly enclose a heat insulation cavity. A heat insulation layer is disposed within the heat insulation cavity, and this heat insulation layer abuts against two adjacent battery cells in the battery pack. By using at least two support members connected end-to-end, only two support members need to be cut from the raw material and connected during production. This process minimizes raw material waste, improving raw material utilization and contributing to cost reduction.

[0051] It should be noted that, Figures 1 to 7 This diagram illustrates a simplified representation of the heat insulation film structure, battery pack, and various components within the vehicle. The specific structures of the heat insulation film structure, battery pack, and other components in the vehicle are not limited to these examples. Figures 1 to 7 of examples.

[0052] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0053] Reference Figures 1 to 5 As shown in the embodiment of this application, a heat insulation film structure 10 is provided for a battery pack, including a support component 100, and the support component 100 has a heat insulation cavity 101.

[0054] In the related art, the heat insulation cavity 101 can be provided with a heat insulation layer (not shown in the drawings). The material of the heat insulation layer can include, but is not limited to, ceramic fiber aerogel, glass fiber aerogel or pre-oxidized fiber aerogel. The heat insulation layer can be one of the above or a combination of two or three of the above. The embodiments of the present application do not limit the structure and material of the heat insulation layer. The heat insulation layer can insulate the heat generated between the two battery cells to avoid heat concentration.

[0055] Of course, in other examples that can be implemented, the heat insulation cavity 101 can be filled with only air or inert gas to prevent heat conduction.

[0056] The support assembly 100 includes at least two support pieces 200 and at least two connecting pieces 300. The two support pieces 200 are connected end to end by the two connecting pieces 300 to collectively surround the heat insulation cavity 101.

[0057] In the above embodiments, referring to Figure 6 and Figure 7 , the support frame 30 in the related art is integrally formed during manufacturing. The raw material can be a foam board 20. The support frame 30 needs to be cut from the foam board 20. The foam at the position of the heat insulation cavity 101 needs to be cut off to place the heat insulation layer. This results in a lot of waste and consumption of foam. When the support frame 30 is cut from the foam board 20, the number of support frames 30 available for cutting is small, and the production efficiency is low.

[0058] By providing at least two support pieces 200, a plurality of support pieces 200 can be produced on the same foam board 20. Then, the support pieces 200 are assembled to surround the heat insulation cavity 101. In one example, the support pieces 200 can be cut from the foam board 20 as shown in Figure 6 . This results in less waste of raw materials and helps to reduce costs.

[0059] In addition, in the above embodiments, at least two support pieces 200 are provided to surround the heat insulation cavity 101 in an assembled form for placing the heat insulation layer. The internal profile size of the heat insulation cavity 101 can be changed according to the external profile size of the heat insulation layer. This can adapt the support assembly 100 to heat insulation layers of different specifications and sizes, thereby reducing the assembly difficulty of the heat insulation film and improving the adaptability.

[0060] In other possible implementations, the support piece 200 includes two support bars 210. The end portions of the two support bars 210 are connected, and the two support bars 210 have an included angle therebetween. In one example, the two support bars 210 are arranged perpendicularly, or understood as the support piece 200 being L-shaped. Two L-shaped support pieces 200 surround the heat insulation cavity 101.

[0061] In the above embodiment, by arranging the connecting piece 300, the gap between the support pieces 200 can be filled, the heat insulation effect is ensured, and the connecting piece 300 can also connect the adjacent two support pieces 200, so that the adjacent two support pieces 200 are connected as a whole, which helps to improve the connection stability. In an example, the connecting piece 300 is a filling glue. By arranging the form of the filling glue, the connecting piece 300 can be tightly bonded with the support piece 200. In addition, the connecting piece 300 has a certain fluidity, which can better fill the gap between the support pieces 200.

[0062] In a possible implementation, two release components 400 are further included.

[0063] The release component 400 includes an adhesive layer 410 and a release paper 420, and the adhesive layer 410 is connected with the support piece 200.

[0064] The release paper 420 is configured to be movably bonded to the side of the adhesive layer 410 away from the support piece 200, and after the release paper 420 is separated from the adhesive layer 410, the adhesive layer 410 is used to bond with the battery cell. The opposite sides of each support piece 200 are covered with the same adhesive layer 410.

[0065] In the above embodiment, the adhesive layer 410 can be an adhesive layer 410 with double-sided adhesion. The adhesive layer 410 is bonded with the support piece 200, and the side of the adhesive layer 410 away from the support piece 200 is bonded with the release paper 420. The release paper 420 can protect the adhesion of the adhesive layer 410 from being contaminated by external impurities, so as to ensure that the adhesive layer 410 does not fail during transportation or stacking. When it is needed to be used, the release paper 420 can be removed, so that the adhesive layer 410 is used to bond with the battery cell, and the service life is prolonged.

[0066] In a possible implementation, the edge of the adhesive layer 410 is located outside the support piece 200, or the projection of the support piece 200 towards the adhesive layer 410 is located inside the adhesive layer 410. In this way, when the support piece 200 is bonded with the battery cell through the adhesive layer 410, the bonding stability of the support piece 200 can be ensured, and the bonding stability can be improved.

[0067] In a possible implementation, the release paper 420 has at least one hand tearing part 430.

[0068] The hand tearing part 430 protrudes from the release paper 420.

[0069] In a specific implementation, an operator can pinch the hand tearing part 430 to easily peel the release paper 420 from the adhesive layer 410, so as to facilitate the next operation. By arranging the hand tearing part 430, the efficiency of the operator in peeling the release paper 420 can be improved.

[0070] In a possible implementation, referring to Figure 4 As shown, the thickness of the adhesive layer 410 is set to 0.95mm-1.15mm. In an example, the thickness of the adhesive layer 410 can be any value among 0.95mm, 0.98mm, 1.00mm, 1.01mm, 1.12mm, 1.15mm. By limiting the thickness of the adhesive layer 410, on the one hand, the adhesive layer 410 is prevented from being too small in thickness to reduce the adhesion and affect the stability of adhesion to the battery cell, and on the other hand, the adhesive layer 410 is prevented from being too large in thickness to reduce the adhesion stability and even cause the support 200 to shake.

[0071] In other implementations, the thickness of the support 200 is set to 1.80mm-2.20mm, which can be any value among 1.80mm, 1.81mm, 1.90mm, 1.99mm, 2.00mm, 2.01mm, 2.20mm. By setting the thickness of the support 200, the heat insulation effect between the adjacent two battery cells can be ensured while reducing the consumption of raw materials.

[0072] In a possible implementation, the thickness of the support 200 is the same as the thickness of the heat insulation layer.

[0073] In the above embodiments, by setting the thickness of the support 200 to be the same as the thickness of the heat insulation layer, the heat insulation layer can be completely embedded into the heat insulation cavity 101, and the support 200 can provide a certain supporting force to prevent the adjacent two battery cells from pressing the heat insulation layer and ensure the heat insulation effect.

[0074] In a possible implementation, the application further provides a battery pack comprising the above heat insulation film structure 10 and at least two battery cells.

[0075] The heat insulation film structure 10 is arranged between the two battery cells.

[0076] The specific structure of the heat insulation film structure 10 has been described above and will not be repeated here. The battery pack has all the beneficial technical effects of the heat insulation film structure 10 described above and can reduce the cost of the battery pack.

[0077] The application further provides a vehicle comprising a vehicle body and the above battery pack, and the battery pack is arranged on the vehicle body.

[0078] It should be noted that the vehicle in the present application can refer to a large car, a small car, a special car, and the like. For example, according to the vehicle type, the car in the present application can be a sedan type, a cross-country type, a multi-purpose vehicle (MPV) type, or other types. For the vehicle, generally, a wheel, a power source, and a transmission system arranged between the wheel and the power source are provided. The transmission system can transmit power provided by the power source to the wheel to drive the vehicle to run. The vehicle has all the beneficial technical effects of the battery pack.

[0079] The implementation principle of the heat insulation film structure 10, the battery pack and the vehicle according to an embodiment of the present application is as follows: the heat insulation film structure 10 comprises a support assembly 100, the support assembly 100 comprises at least two support pieces 200 and at least two connecting pieces 300, the two support pieces 200 are connected in a head-to-tail manner through the two connecting pieces 300 to jointly enclose a heat insulation cavity 101, and a heat insulation layer is arranged in the heat insulation cavity.

[0080] By arranging the two support pieces 200 in a head-to-tail connection manner, only the support piece 200 needs to be cut on the raw material during production, and the waste of the raw material is less, which helps to improve the utilization rate of the raw material and reduce the cost.

[0081] Other embodiments of the present application will be readily apparent to those skilled in the art in view of the disclosure, which has been presented in the foregoing description.

[0082] The present application is intended to cover any variations, uses, or adaptive changes of the present application following the general principles of the present application and including common knowledge or conventional technical means in the technical field not disclosed by the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are indicated by the claims.

[0083] It should be understood that the present application is not limited to the precise construction that has been described and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A thermally insulating membrane structure, characterized by, Comprising: a support assembly (100); the support assembly (100) comprises at least two support pieces (200) and at least two connecting pieces (300), two of the support pieces (200) are connected head-to-tail through two of the connecting pieces (300) to jointly enclose a heat insulation cavity (101), a heat insulation layer is arranged in the heat insulation cavity (101), and the heat insulation layer is used for abutting between two adjacent battery cells in a battery pack.

2. The insulating film structure of claim 1, wherein, the support piece (200) comprises two support strips (210), one end of two of the support strips (210) is connected, and the other end of one of the support strips (210) in one of the support pieces (200) and one of the support strips (210) in another of the support pieces (200) have a mounting spacing, and the connecting piece (300) is located in the mounting spacing; two of the support strips (210) in the same support piece (200) have an included angle.

3. The insulating film structure of claim 1, wherein, the connecting piece (300) is filled glue.

4. The insulating film structure of claim 1, wherein, further comprising two release assemblies (400); the release assembly (400) comprises an adhesive layer (410) and a release paper (420) arranged on the adhesive layer (410), and each of the support pieces (200) is covered with the same adhesive layer (410) on opposite sides.

5. The insulating film structure of claim 4, wherein, the edge of the adhesive layer (410) is located outside the support piece (200).

6. The insulating film structure of claim 4, wherein, the release paper (420) has at least one hand tearing part (430); the hand tearing part (430) protrudes from the release paper (420).

7. The insulating film structure of claim 4, wherein, the thickness of the adhesive layer (410) is set to 0.95mm-1.15mm.

8. The insulating film structure according to any one of claims 1 to 7, wherein the thickness of the support piece (200) is the same as the thickness of the heat insulation layer.

9. A battery pack, characterized by, comprising the heat insulation film structure (10) according to any one of claims 1 to 8 and at least two battery cells; the heat insulation film structure (10) is arranged between two of the battery cells.

10. A vehicle characterized by comprising: comprising a vehicle body and the battery pack according to claim 9, and the battery pack is arranged on the vehicle body.

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