Thermal insulation pad capable of being spliced

Abstract

The utility model discloses a splicable heat insulation pad which comprises at least two sub heat insulation pads, the adjacent sub heat insulation pads are spliced together through a concave-convex structure to form the heat insulation pad, and a functional layer is arranged at the position, corresponding to a high heating part of a battery cell, of the heat insulation pad; the functional layer is a phase change layer or a high refractory material layer, and the fire resistance of the high refractory material layer is higher than that of the heat insulation pad. According to the utility model, the heat insulation pad with a splicing structure is used, so that the size of the heat insulation pad can be flexibly adjusted and functional layers with different performances can be selected according to actual requirements of customers; the functional layer can be arranged in an area where a battery cell heat source is higher or thermal runaway is easy to occur; under the condition that the length of the heat insulation pad is larger than 900 mm and the thickness of the heat insulation pad is smaller than 0.6 mm, when the whole heat insulation material is used for packaging, the warping or hollowing phenomenon is prone to occurring, the reject ratio in the production process is greatly reduced through the heat insulation pad of the splicing structure, the production cost is reduced, and the production efficiency is improved; the space of the battery pack can be utilized to the maximum extent, the overall utilization rate of the battery pack is improved, and the whole vehicle achieves the light weight effect.

Description

Technical Field

[0001] The utility model belongs to the field of thermal runaway protection of new energy power batteries, and specifically relates to a splicable thermal insulation pad. Background Art

[0002] With the introduction of the concept of green environmental protection, electric vehicles are becoming more and more popular. The key technologies of new energy vehicles lie in the three major systems of battery system, motor system and electronic control system. As the power source of the car, the battery system's cruising range and safety performance directly affect the customer experience. At present, in order to reduce the volume of the battery pack and improve the volume utilization and energy density of the battery pack, power batteries are developing towards thicker and longer. Therefore, battery insulation pads also need to adapt to the trend of high length and width ratio of power batteries, so higher requirements are put forward for the preparation size and efficiency of battery insulation pads. At present, conventional battery insulation pads are encapsulated with a whole piece of integrated insulation core material, which cannot meet diversified requirements. Utility Model Content

[0003] The utility model provides a splicable heat-insulating pad, which can be adjusted and combined according to the specific needs of users, thus providing a wider range of usage possibilities.

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

[0005] A splicable thermal insulation pad includes at least two sub-insulation pads, adjacent sub-insulation pads are spliced ​​together through a concave-convex structure to form a thermal insulation pad, and a functional layer is provided at the position corresponding to the high-heating part of the thermal insulation pad and the battery core; the functional layer is a phase change layer or a high-refractory material layer, and the fire resistance of the high-refractory material layer is higher than the fire resistance of the thermal insulation pad itself. Splicing into a whole can be adjusted according to needs, and the protection performance of the thermal insulation pad is further improved by the setting of the functional layer.

[0006] As a preferred solution of the utility model, it includes three sub-insulation pads, namely sub-insulation pad I, sub-insulation pad II and sub-insulation pad III. Sub-insulation pad I and sub-insulation pad II are arranged on both sides of sub-insulation pad II and are respectively spliced ​​with sub-insulation pad III through a concave-convex structure, and the functional layer is arranged on sub-insulation pad III.

[0007] As a preferred embodiment of the utility model, the sub-insulation pad I is provided with a protrusion I at the end portion spliced ​​with the sub-insulation pad III; the sub-insulation pad II is provided with a protrusion II at the end portion spliced ​​with the sub-insulation pad III; the two ends of the sub-insulation pad III are provided with a groove I and a groove II, the groove I corresponds to the protrusion I, and the groove II corresponds to the protrusion II.

[0008] As a preferred embodiment of the utility model, the sub-insulation pad I is provided with a groove I at the end portion spliced ​​with the sub-insulation pad III; the sub-insulation pad II is provided with a groove II at the end portion spliced ​​with the sub-insulation pad III; and protrusions I and protrusions II are provided at both ends of the sub-insulation pad III, and the groove I corresponds to the protrusion I, and the groove II corresponds to the protrusion II.

[0009] As a preferred solution of the utility model, the protrusions I and II are in the shape of a square, a triangle or a trapezoid. The corresponding grooves I and II are in the same shape. And the splicing direction of the concave-convex structure is arranged along the length of the battery cell or the length of the battery module.

[0010] As a preferred embodiment of the present invention, the sub-insulation pad I includes several sub-insulation pads I', each sub-insulation pad I' is assembled in sequence; the sub-insulation pad II includes several sub-insulation pads II', each sub-insulation pad II' is assembled in sequence; the sub-insulation pad IIII includes several sub-insulation pads IIII', each sub-insulation pad III' is assembled in sequence.

[0011] As a preferred solution of the utility model, the sub-insulation pad includes an aerogel insulation core material and a packaging film, the thickness of the aerogel insulation core material is 0.5-1.5 mm; the thickness of the packaging film is 0.035-0.05 mm.

[0012] As a preferred solution of the utility model, the high refractory material layer is a ceramic silicone rubber layer or mica paper, and the thickness is 0.5-1.5 mm.

[0013] The utility model is applied to the field of thermal runaway of power batteries and has the following beneficial effects:

[0014] 1. Using the thermal insulation pad with splicing structure, the size of the thermal insulation pad can be flexibly adjusted and the functional layers with different performance can be selected according to the actual needs of customers;

[0015] 2. The functional layer can be set in the area where the heat source of the battery cell is higher or prone to thermal runaway;

[0016] 3. When the insulation pad is longer than 900mm and thinner than 0.6mm, it is easy to warp or hollow when using a whole piece of insulation material for packaging. The spliced ​​structure insulation pad greatly reduces the defective rate in the production process, reduces production costs, and improves production efficiency;

[0017] 4. It can maximize the use of the battery pack space, improve the overall utilization of the battery pack, and make the entire vehicle lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of Example 1.

[0020] Figure 2 This is a schematic diagram of the structure of Example 2.

[0021] Figure 3 This is a schematic diagram of the structure of Example 3.

[0022] Figure 4 This is a schematic diagram of the structure of Example 4.

[0023] Figure 5 This is a schematic diagram of the structure of Example 5.

[0024] Figure 6 This is a schematic diagram of the structure of Example 6. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] A splicable thermal insulation pad, such as Figure 1 As shown, it includes three sub-insulation pads, each of which includes an aerogel insulation core material and a packaging film. The thickness of the aerogel insulation core material is 0.5-1.5 mm; the thickness of the packaging film is 0.035-0.05 mm.

[0028] The three sub-insulation pads are sub-insulation pad I1, sub-insulation pad II2 and sub-insulation pad III3. Sub-insulation pad I1 and sub-insulation pad II2 are arranged on both sides of sub-insulation pad III3 and are respectively spliced ​​with sub-insulation pad III3 through a concave-convex structure to form an insulation pad, and the splicing direction of the concave-convex structure is set along the length of the battery cell or the length of the battery module.

[0029] A functional layer is provided at the position corresponding to the high-heating part of the thermal insulation pad and the battery core; the functional layer is provided on the sub-insulation pad III. The functional layer is a phase change layer or a high-refractory material layer. The refractory performance of the high-refractory material layer is higher than that of the thermal insulation pad itself. Ceramic silicone rubber and mica paper can be used, with a thickness of 0.5~1.5mm. The phase change layer can use phase change silica gel and molten salt, etc., which can be spliced ​​into a whole and adjusted according to needs, and the protective performance of the thermal insulation pad is further improved by the setting of the functional layer.

[0030] The sub-insulation pad I is provided with a protrusion I11 at the end where it is spliced ​​with the sub-insulation pad III; the sub-insulation pad II is provided with a protrusion II21 at the end where it is spliced ​​with the sub-insulation pad III; the two ends of the sub-insulation pad III are provided with grooves I31 and II32, the groove I corresponds to the protrusion I, the groove II corresponds to the protrusion II, and the groove I, the groove II, the protrusion I and the protrusion II are all long strips, such as Figure 1 shown.

[0031] In this embodiment, the sub-insulation pad I1, sub-insulation pad II2 and sub-insulation pad III3 are all integrated structures. Of course, at least one of the sub-insulation pad I1, sub-insulation pad II2 and sub-insulation pad III3 can also be an assembled structure according to actual needs.

[0032] When the sub-insulation pad I adopts an assembled structure, the sub-insulation pad I includes a plurality of sub-insulation pads I', each sub-insulation pad I' is assembled in sequence.

[0033] When the sub-insulation pad II adopts an assembled structure, the sub-insulation pad II includes a plurality of sub-insulation pads II', and each sub-insulation pad II' is assembled in sequence.

[0034] When the sub-insulation pad III adopts an assembled structure, the sub-insulation pad IIII includes a plurality of sub-insulation pads IIII', and each sub-insulation pad III' is assembled in sequence.

[0035] Embodiment 2:

[0036] A splicable thermal insulation pad, such as Figure 2 As shown, the groove I, the groove II, the protrusion I and the protrusion II are all triangular, and the rest are the same as those in the first embodiment.

[0037] Embodiment 3:

[0038] A splicable thermal insulation pad, such as Figure 3 As shown, the groove I, the groove II, the protrusion I and the protrusion II are all trapezoidal, and the rest are the same as those in the first embodiment.

[0039] Embodiment 4:

[0040] A splicable thermal insulation pad, such as Figure 4As shown, the sub-insulation pad I is provided with a groove I at the end portion spliced ​​with the sub-insulation pad III; the sub-insulation pad II is provided with a groove II at the end portion spliced ​​with the sub-insulation pad III; the two ends of the sub-insulation pad III are provided with protrusions I and protrusions II, the groove I corresponds to the protrusion I, the groove II corresponds to the protrusion II, the groove I, the groove II, the protrusion I and the protrusion II are all in the shape of long strips, and the rest are the same as in Example 1.

[0041] Embodiment 5:

[0042] A splicable thermal insulation pad, such as Figure 5 As shown, the groove I, the groove II, the protrusion I and the protrusion II are all triangles, and the rest are the same as those in the fourth embodiment.

[0043] Embodiment 6:

[0044] A splicable thermal insulation pad, such as Figure 6 As shown, the groove I, the groove II, the protrusion I and the protrusion II are all trapezoidal, and the rest are the same as those in the fourth embodiment.

[0045] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A splicable thermal insulation pad, characterized in that: It comprises at least two sub-insulation pads, adjacent sub-insulation pads are assembled together through a concave-convex structure to form an insulation pad, and a functional layer is provided at a position corresponding to the insulation pad and the high heating part of the battery cell; the functional layer is a phase change layer or a high refractory material layer, and the fire resistance of the high refractory material layer is higher than the fire resistance of the insulation pad itself.

2. The splicable thermal insulation pad according to claim 1, characterized in that: It includes three sub-insulation pads, namely sub-insulation pad I, sub-insulation pad II and sub-insulation pad III. Sub-insulation pad I and sub-insulation pad II are arranged on both sides of sub-insulation pad II and are respectively spliced ​​with sub-insulation pad III through concave-convex structures; the functional layer is arranged on sub-insulation pad III.

3. The splicable thermal insulation pad according to claim 2, characterized in that: The sub-insulation pad I is provided with a protrusion I at the end spliced ​​with the sub-insulation pad III; the sub-insulation pad II is provided with a protrusion II at the end spliced ​​with the sub-insulation pad III; the two ends of the sub-insulation pad III are provided with grooves I and grooves II, the groove I corresponds to the protrusion I, and the groove II corresponds to the protrusion II.

4. The splicable thermal insulation pad according to claim 2, characterized in that: The sub-insulation pad I is provided with a groove I at the end portion spliced ​​with the sub-insulation pad III; the sub-insulation pad II is provided with a groove II at the end portion spliced ​​with the sub-insulation pad III; protrusions I and protrusions II are provided at both ends of the sub-insulation pad III, and the groove I corresponds to the protrusion I, and the groove II corresponds to the protrusion II.

5. The splicable thermal insulation pad according to claim 3 or 4, characterized in that: The protrusions I and II are in the shape of a square, a triangle or a trapezoid.

6. The splicable thermal insulation pad according to claim 3 or 4, characterized in that: The sub-insulation pad I includes several sub-insulation pads I', and each sub-insulation pad I' is assembled in sequence; the sub-insulation pad II includes several sub-insulation pads II', and each sub-insulation pad II' is assembled in sequence; the sub-insulation pad IIII includes several sub-insulation pads IIII', and each sub-insulation pad III' is assembled in sequence.

7. The splicable thermal insulation pad according to claim 1 or 2, characterized in that: The sub-insulation pad comprises an aerogel insulation core material and a packaging film. The thickness of the aerogel insulation core material is 0.5-1.5 mm; the thickness of the packaging film is 0.035-0.05 mm.

8. The splicable thermal insulation pad according to claim 1, characterized in that: The high refractory material layer is a ceramic silicone rubber layer or mica paper, and has a thickness of 0.5-1.5 mm.

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