Heat insulation assembly, battery module and battery pack

Abstract

The utility model discloses a heat insulation assembly which comprises a buffering shaping frame which is of an annular frame structure. The aerogel part is embedded in the buffer shaping frame; the release film assembly comprises a first release film and a second release film, and the aerogel part is clamped between the first release film and the second release film. Meanwhile, the utility model further discloses a battery module applying the heat insulation assembly and a battery pack applying the battery module, and the problem that the pre-tightening force of the battery module is too small due to the fact that existing aerogel deforms after being compressed is solved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and in particular to a heat insulation component, a battery module and a battery pack. Background Art

[0002] As an excellent thermal insulation material, aerogel is currently widely used in battery modules, usually as a thermal insulation pad between battery cells, which can effectively reduce battery temperature and improve the efficiency and stability of energy storage systems. However, aerogel itself has problems such as compressibility and resilience that are not as good as foam and silicone. Some aerogels even undergo plastic deformation after compression and cannot rebound, resulting in too little preload after battery module assembly, affecting the overall assembly size of the battery module and the number of battery cell cycles. Utility Model Content

[0003] In order to overcome at least one defect of the above-mentioned prior art, the utility model provides a thermal insulation component, a battery module and a battery pack, which solves the problem that the existing aerogel deforms after being compressed and causes the preload force of the battery module to be too small.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] A thermal insulation assembly, comprising:

[0006] A buffer shaping frame, wherein the buffer shaping frame is a ring-shaped frame structure;

[0007] an aerogel body, wherein the aerogel body is embedded in the buffer shaping frame;

[0008] A release film assembly comprises a first release film and a second release film, wherein the aerogel body is sandwiched between the first release film and the second release film.

[0009] In some embodiments of the utility model, the thermal insulation assembly further includes a first flame retardant adhesive and a second flame retardant adhesive, the buffer forming frame and / or the aerogel body are adhered to the first release film via the first flame retardant adhesive, and the buffer forming frame and / or the aerogel body are adhered to the second release film via the second flame retardant adhesive.

[0010] In some embodiments of the present invention, the first flame retardant adhesive is located within the coverage of the first release film, and the second flame retardant adhesive is located within the coverage of the second release film.

[0011] In some embodiments of the present invention, a first film ear is formed on the first release film and protrudes toward the outside of the buffer shaping frame.

[0012] In some embodiments of the present invention, a second film ear is formed on the second release film and protrudes toward the outside of the buffer shaping frame.

[0013] In some embodiments of the present invention, the first thickness of the aerogel body in the original state is less than the final thickness of the buffer finalizing frame in the compressive deformation state, and the original state is the state where the aerogel body is not subjected to force and maintains the original shape.

[0014] In some embodiments of the present invention, the second thickness of the aerogel body in the original state is less than the original thickness of the buffer shaping frame in the deformation recovery state, and the original state is the state where the aerogel body is not subjected to force and maintains the original shape.

[0015] In some embodiments of the present invention, the buffer shaping frame is a frame structure made of silica gel or foam.

[0016] The utility model also discloses a battery module, comprising a plurality of the above-mentioned heat insulation components and a plurality of battery cell units, wherein a heat insulation component is disposed between each of two adjacent battery cell units.

[0017] The utility model also discloses a battery pack, comprising the above-mentioned battery module.

[0018] In summary, the thermal insulation assembly, battery module and battery pack provided by the utility model have the following technical effects:

[0019] The aerogel body is cleverly constrained inside the buffer forming frame and packaged with a first release film and a second release film, so that the aerogel body can be stably combined with the buffer forming frame into one, and under the action of the buffer forming frame, the deformation of the aerogel body is reduced, which solves the problem of too small preload force of the battery module caused by deformation of the existing aerogel after compression, thereby ensuring the overall assembly size of the battery module and the number of battery cell cycles, improving the assembly yield of the battery module, and reducing the rework cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the explosion structure of a heat insulation component of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of a heat insulation component of the utility model;

[0022] Figure 3 This is a disassembled structural diagram of the buffer shaping frame and the aerogel body in the utility model.

[0023] Icons: 1- thermal insulation component, 11- buffer forming frame, 111- first inner abutment surface, 112- second inner abutment surface, 113- buffer contact surface, 114- inner cavity of forming frame, 12- aerogel body, 121- first colloid surface, 122- second colloid surface, 123- third colloid surface, 13- release film assembly, 131- first release film, 132- second release film, 133- first film ear, 134- second film ear, 141- first flame retardant adhesive, 142- second flame retardant adhesive. DETAILED DESCRIPTION

[0024] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] Please combine the specific Figures 1 to 3 As shown, the utility model discloses a heat insulation component 1, including a buffer shaping frame 11 and an aerogel body 12, the buffer shaping frame 11 is a ring-shaped frame structure, the ring shape here can be selected as a rectangular ring, a circular ring, or a ring structure with a style set according to design requirements, the aerogel body 12 is a rectangular body, specifically, the aerogel body 12 has a first colloid surface 121, a second colloid surface 122 and a third colloid surface 123, wherein the first colloid surface 121 is the side with the largest area in the aerogel body 12, and the direction perpendicular to the first colloid surface 121 is the thickness direction of the aerogel body 12, the second colloid surface 122 is vertically connected to the first colloid surface 121, and the first colloid surface 121 and the second colloid surface 122 are both vertically connected to the third colloid surface 123.

[0028] It can be understood that when the lengths of the four sides of the first colloid surface 121 are the same, the area of ​​the second colloid surface 122 is equal to the area of ​​the third colloid surface 123. Figure 3As shown, when the first colloid surface 121 is rectangular, the second colloid surface 122 is arranged corresponding to the long side of the first colloid surface 121 , and the third colloid surface 123 is arranged corresponding to the short side of the first colloid surface 121 , then the area of ​​the second colloid surface 122 is larger than that of the third colloid surface 123 .

[0029] Furthermore, if Figure 3 As shown, the buffer shaping frame 11 has a buffer contact surface 113, a shaping frame inner cavity 114, and a first inner abutment surface 111 and a second inner abutment surface 112 arranged in the shaping frame inner cavity 114, wherein the buffer contact surface 113 is a side surface in the shape of a Chinese umbilical cord in the buffer shaping frame 11, and the direction perpendicular to the buffer contact surface 113 is the thickness direction of the buffer shaping frame 11, the first inner abutment surface 111 is used to abut against the third colloid surface 123, and the second inner abutment surface 112 is used to abut against the second colloid surface 122.

[0030] In this embodiment, the aerogel member 12 is embedded in the inner cavity 114 of the buffer shaping frame 11. Preferably, the first inner abutment surface 111 of the buffer shaping frame 11 abuts against the third colloid surface 123 of the aerogel member 12, and the second inner abutment surface 112 of the buffer shaping frame 11 abuts against the second colloid surface 122 of the aerogel member 12. Of course, only the first inner abutment surface 111 of the buffer shaping frame 11 abuts against the third colloid surface 123 of the aerogel member 12, or only the second inner abutment surface 112 of the buffer shaping frame 11 abuts against the second colloid surface 122 of the aerogel member 12, and the aerogel member 12 is embedded and fixed inside the buffer shaping frame 11.

[0031] It should be noted that the first inner abutment surface 111 of the buffer forming frame 11 can also be bonded and fixed to the third colloid surface 123 of the aerogel body 12 by means of a flame retardant double-sided adhesive tape, and the second inner abutment surface 112 of the buffer forming frame 11 can also be bonded and fixed to the second colloid surface 122 of the aerogel body 12 by means of a flame retardant double-sided adhesive tape, thereby better ensuring the stability of the assembly between the buffer forming frame 11 and the aerogel body 12.

[0032] It should also be noted that the above-mentioned buffer forming frame 11 is a frame structure made of buffer material, and the buffer material can be selected as silicone or foam, so that when the insulation component 1 is assembled between two adjacent battery cell units, the buffer forming frame 11 of the insulation component 1 can bear the force and buffer its force and / or impact force.

[0033] Unexpectedly, by utilizing the good rebound characteristics of the buffer shaping frame 11, when two adjacent battery cell units exert a squeezing force on the thermal insulation component 1, the buffer shaping frame 11 can prevent the aerogel body 12 from excessive deformation, and keep the aerogel body 12 in a relatively small and stable deformation. At the same time, part of the force of the battery cell unit is applied to the buffer contact surface 113 of the buffer shaping frame 11, that is, during the assembly process, the large battery surface of the battery cell unit mainly acts on the buffer contact surface 113 of the buffer shaping frame 11, thereby reducing the deformation of the aerogel body 12, and the thermal insulation component 1 as a whole will not undergo excessive deformation and plastic deformation, avoiding the problem of too small preload force when the thermal insulation component 1 is assembled in the battery module, and ensuring the overall assembly size of the battery module and the number of battery cell cycles.

[0034] As a preferred embodiment of the present invention, the first thickness of the aerogel body 12 in its original state is less than the final thickness of the buffer forming frame 11 in the compressive deformation state. The original state here refers to the state where the aerogel body 12 is not subjected to force and maintains its original shape, that is, after the thermal insulation component 1 is assembled to the battery module and a preload is applied, the first thickness of the aerogel body 12 is thinner than the final thickness of the buffer forming frame 11. At this time, the aerogel body 12 does not produce compressive deformation, thereby further reducing the deformation amount of the aerogel body 12 after being subjected to the extrusion force, thereby ensuring that the aerogel body 12 does not affect the compression of the buffer forming frame 11 during the use of the thermal insulation component 1, and effectively ensuring the stability of the thermal insulation component 1.

[0035] As another preferred mode of this embodiment, the second thickness of the aerogel body 12 in the original state is less than the original thickness of the buffer shaping frame 11 in the deformation recovery state, and the original state is the state where the aerogel body 12 is not subjected to force and maintains the original shape. That is, before the thermal insulation component 1 is assembled to the battery module, or the thermal insulation component 1 is in the incoming material state, the second thickness of the aerogel body 12 is greater than the original thickness of the buffer shaping frame 11. In this way, the aerogel body 12 will not be deformed during the assembly process, and it can also ensure that the aerogel body 12 does not affect the compression of the buffer shaping frame 11 during the use of the thermal insulation component 1, effectively ensuring the stability of the use of the thermal insulation component 1.

[0036] In this embodiment, please refer to Figure 1 and Figure 2As shown, the thermal insulation assembly 1 further includes a release film assembly 13, wherein the release film assembly 13 includes a first release film 131 and a second release film 132, and the aerogel body 12 is sandwiched between the first release film 131 and the second release film 132. That is, the first release film 131 and the second release film 132 are used to package the buffer shaping frame 11 and the aerogel body 12, and during the packaging process, the air between the first release film 131 and the aerogel body 12, between the second release film 132 and the aerogel body 12, between the first release film 131 and the buffer shaping frame 11, and between the second release film 132 and the buffer shaping frame 11 is evacuated to ensure that the two are more closely attached.

[0037] As a preferred method of this embodiment, please refer to Figure 1 and Figure 2 As shown, the thermal insulation component 1 also includes a first flame retardant adhesive 141 and a second flame retardant adhesive 142, wherein the first flame retardant adhesive 141 and the second flame retardant adhesive 142 are flame retardant double-sided adhesive layers. The first flame retardant adhesive 141 covers the buffer shaping frame 11 and the aerogel body 12, and the buffer shaping frame 11 and the aerogel body 12 are both adhered to the first release film 131 through the first flame retardant adhesive 141. The second flame retardant adhesive 142 covers the buffer shaping frame 11 and the aerogel body 12, and the buffer shaping frame 11 and the aerogel body 12 are both adhered to the second release film 132 through the second flame retardant adhesive 142.

[0038] In some other embodiments, the first flame retardant adhesive 141 only covers the buffer shaping frame 11, and the first release film 131 passes through the first flame retardant adhesive 141 and the buffer shaping frame 11. The second flame retardant adhesive 142 only covers the buffer shaping frame 11, and the second release film 132 passes through the second flame retardant adhesive 142 and the buffer shaping frame 11.

[0039] In some other embodiments, the first flame retardant adhesive 141 only covers the aerogel body 12, and the first release film 131 passes through the first flame retardant adhesive 141 and the aerogel body 12. The second flame retardant adhesive 142 only covers the aerogel body 12, and the second release film 132 passes through the second flame retardant adhesive 142 and the aerogel body 12.

[0040] In this way, the first flame retardant adhesive 141 is located within the coverage of the first release film 131, and the second flame retardant adhesive 142 is located within the coverage of the second release film 132. The first release film 131 can ensure the effectiveness of the first flame retardant adhesive 141 and the flame retardant double-sided adhesive between the buffer shaping frame 11 and the aerogel body 12, and can also ensure the cleanliness of the side of the buffer shaping frame 11 and the aerogel body 12 close to the first release film 131. The second release film 132 can ensure the effectiveness of the second flame retardant adhesive 142 and the flame retardant double-sided adhesive between the buffer shaping frame 11 and the aerogel body 12, and can also ensure the cleanliness of the side of the buffer shaping frame 11 and the aerogel body 12 close to the second release film 132.

[0041] The unexpected effect is that the cooperation between the first release film 131 and the second release film 132 of the release film assembly 13 can further firmly fix the aerogel body 12 inside the buffer shaping frame 11, avoiding the problem of the aerogel body 12 being separated from the buffer shaping frame 11, and also shaping the aerogel body 12 in the buffer shaping frame 11 to prevent the aerogel body 12 from being deformed before or during installation in the battery module. In addition, after tearing off the first release film 131 and the second release film 132, under the action of the first flame retardant adhesive 141 and the second flame retardant adhesive 142, a stable combination between the aerogel body 12 and the buffer shaping frame 11 can also be achieved.

[0042] When the heat insulation component 1 is in use, the release film component 13 needs to be peeled off the buffer shaping frame 11 and the aerogel body 12, and the battery large surface of the battery cell unit directly acts on the buffer shaping frame 11 and the aerogel body 12. Optionally, the first flame retardant adhesive 141 of the heat insulation component 1 is bonded to the battery large surface of one battery cell unit, and the second flame retardant adhesive 142 of the heat insulation component 1 is bonded to the battery large surface of another battery cell unit, so that the heat insulation component 1 is not easy to be separated from the battery module, and the compactness of the battery module assembly is ensured, and at the same time, it can also effectively block the heat spread of the battery cell unit in a thermal runaway state.

[0043] As a further preferred method of this embodiment, please refer to Figure 1 and Figure 2 As shown, a first film ear 133 is formed on the first release film 131 and protrudes toward the outside of the buffer and shaping frame 11 , and a second film ear 134 is formed on the second release film 132 and protrudes toward the outside of the buffer and shaping frame 11 .

[0044] Specifically, the first film ear 133 is preferably integrally formed with the first release film 131 , and of course, the first film ear 133 may also be attached to the first release film 131 . The second film ear 134 is preferably integrally formed with the second release film 132 , and of course, the second film ear 134 may also be attached to the second release film 132 .

[0045] Thus, under the action of the first film ear 133 , it is easy to peel off the first release film 131 , and under the action of the second film ear 134 , it is easy to peel off the second release film 132 .

[0046] Based on the structure and connection relationship of the above-mentioned thermal insulation component 1, the inventor also discloses a battery module, which includes a plurality of thermal insulation components 1 and a plurality of battery cell units, and a thermal insulation component 1 is disposed between two adjacent battery cell units. At this time, the aerogel body 12 of the thermal insulation component 1 can effectively isolate the heat conduction between two adjacent battery cell units, and the buffer shaping frame 11 of the thermal insulation component 1 can accept the force of the two adjacent battery cell units during the assembly process and reduce the force of the aerogel body 12, thereby well ensuring the overall preload of the battery module.

[0047] The release film assembly 13 is torn off during the assembly and use of the heat insulation assembly 1, so that the battery cell unit is bonded to the first flame retardant adhesive 141 of the heat insulation assembly 1, and at the same time, the battery cell unit is bonded to the second flame retardant adhesive 142 of the heat insulation assembly 1. The first flame retardant adhesive 141 and the second flame retardant adhesive 142 of the heat insulation assembly 1 can not only effectively ensure the safety of the battery module, but also improve the firmness of the overall assembly of the battery module.

[0048] In addition, based on the above-mentioned battery module, the inventor also disclosed a battery pack, which includes the above-mentioned battery module.

[0049] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A thermal insulation assembly (1), characterized in that: include: A buffer shaping frame (11), wherein the buffer shaping frame (11) is a ring-shaped frame structure; an aerogel body (12), wherein the aerogel body (12) is embedded in the interior of the buffer shaping frame (11); A release film assembly (13), wherein the release film assembly (13) comprises a first release film (131) and a second release film (132), and the aerogel body (12) is sandwiched between the first release film (131) and the second release film (132).

2. The thermal insulation assembly (1) according to claim 1, characterized in that: It also includes a first flame retardant adhesive (141) and a second flame retardant adhesive (142); the buffer shaping frame (11) and / or the aerogel body (12) are adhered to the first release film (131) via the first flame retardant adhesive (141); and the buffer shaping frame (11) and / or the aerogel body (12) are adhered to the second release film (132) via the second flame retardant adhesive (142).

3. The thermal insulation assembly (1) according to claim 2, characterized in that: The first flame retardant adhesive (141) is located within the coverage of the first release film (131), and the second flame retardant adhesive (142) is located within the coverage of the second release film (132).

4. The thermal insulation assembly (1) according to claim 1, 2 or 3, characterized in that: A first film ear (133) is formed on the first release film (131) and protrudes toward the outside of the buffer shaping frame (11).

5. The thermal insulation assembly (1) according to claim 1, 2 or 3, characterized in that: A second film ear (134) is formed on the second release film (132) and protrudes toward the outside of the buffer shaping frame (11).

6. The thermal insulation assembly (1) according to claim 1, characterized in that: The first thickness of the aerogel body (12) in the original state is less than the final thickness of the buffer finalizing frame (11) in the compressive deformation state, and the original state is the state in which the aerogel body (12) is not subjected to force and maintains the original shape.

7. The thermal insulation assembly (1) according to claim 1, characterized in that: The second thickness of the aerogel body (12) in the original state is less than the original thickness of the buffer shaping frame (11) in the deformation recovery state, and the original state is the state in which the aerogel body (12) is not subjected to force and maintains the original shape.

8. The thermal insulation assembly (1) according to claim 1 or 2 or 3 or 6 or 7, characterized in that: The buffer shaping frame (11) is a frame structure made of silica gel or foam.

9. A battery module, characterized in that: include: The thermal insulation assembly (1) according to any one of claims 1 to 8; A plurality of battery cell units, with a heat insulation component (1) being arranged between two adjacent battery cell units.

10. A battery pack, characterized in that: Comprising the battery module as claimed in claim 9.

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