Novel interlayer type battery pack box cover

Abstract

The utility model discloses a novel sandwich type battery pack box cover which comprises a box cover body, an annular connecting piece is connected to an opening of the box cover body, the box cover body is composed of a bottom plate, two sets of side plates and two sets of end plates, the side plates and the end plates are located above the bottom plate and are symmetrically distributed, and each side plate comprises an inner wall and an outer wall. An interlayer is formed between the inner wall and the outer wall, an air inlet is formed in the outer wall, and an air outlet is formed in one end plate; a plurality of rails are evenly distributed on the inner wall in the length direction, a sliding way is formed between every two adjacent rails, a slot channel is formed in the inner wall and corresponds to the sliding way, sliding sheet baffles are symmetrically connected to the two ends of the sliding way in a sliding mode, memory alloy is connected to the sliding sheet baffles, and a fixing block is connected to the other end of the memory alloy and connected to the inner wall. According to the utility model, basic sealing, waterproof and dustproof effects can be provided for the battery pack, good heat dissipation can be provided for the battery pack at high temperature, and good heat preservation effect can be provided for the battery pack at low temperature.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and in particular relates to a novel sandwich type battery pack box cover. Background Art

[0002] The battery pack cover plays a role in encapsulating and protecting the battery pack. At present, most of the existing battery pack covers are single-layer structures, which only have the basic functions of sealing, waterproofing and dustproofing. The actual function is relatively limited. With the rapid development of the power battery industry, the single-function battery pack cover has gradually failed to meet the actual needs. Utility Model Content

[0003] The purpose of the utility model is to provide a novel sandwich battery pack cover, which can not only provide basic sealing, waterproof and dustproof effects for the battery pack, but also provide good heat dissipation for the battery pack at high temperatures and provide good thermal insulation for the battery pack at low temperatures.

[0004] To achieve the above-mentioned purpose, the novel sandwich type battery pack box cover comprises a box cover body, the opening of the box cover body is connected with an annular connecting piece, the box cover body is composed of a bottom plate and side plates and end plates located above the bottom plate, the side plates and end plates are respectively provided with two groups, and are symmetrically distributed, the side plates comprise an inner wall and an outer wall, a sandwich is formed between the inner wall and the outer wall, an air inlet is provided on the outer wall, and an air outlet is provided on one of the end plates;

[0005] There are multiple groups of tracks evenly distributed on the inner wall along the length direction, and slideways are formed between adjacent tracks. Slit channels are provided on the inner wall corresponding to the slideways. Slide baffles are symmetrically slidably connected at both ends of the slideway. Memory alloys are connected to the slide baffles. The other end of the memory alloy is connected to a fixed block, and the fixed block is connected to the inner wall.

[0006] As a further solution of the utility model: a circular baffle is provided in the interlayer corresponding to the air inlet, one side of the circular baffle is connected to a baffle bracket, and the other end of the baffle bracket is fixed to the outer wall.

[0007] As a further solution of the utility model: a baffle opening is provided on the circular baffle.

[0008] As a further solution of the utility model: the track cross section is a T-shaped structure, which cooperates with the inner wall to form a slideway to constrain the sliding plate baffle.

[0009] As a further solution of the utility model: a notch is reserved on the sliding plate corresponding to the fixing block.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The limitations of the traditional single-layer box cover have been improved by setting up a sandwich layer to form an air-cooling channel, so that in addition to the basic functions of sealing, waterproofing and dustproofing, it also has the functions of high-temperature heat dissipation and low-temperature heat preservation;

[0012] The circular baffle and the slit channel can make the air flow more uniform;

[0013] The sliding vane baffle system composed of the sliding rail, sliding vane baffle, fixed block and memory metal on the inner wall can achieve air cooling without adding redundant structure to the battery pack under high temperature conditions, and can form an air interlayer under low temperature conditions. The air interlayer can effectively isolate the external low-temperature air from transferring cold to the battery pack, providing good thermal insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of a new sandwich battery pack cover.

[0015] Figure 2 It is a schematic diagram of the structure of the cover body of the new sandwich battery pack cover.

[0016] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0017] Figure 4 It is a schematic diagram of the circular baffle structure of the new sandwich battery pack cover.

[0018] In the figure: 1, box cover body, 2, air inlet, 3, annular connector, 4, air outlet, 5, track, 6, slide baffle, 7, slideway, 8, memory alloy, 9, fixing block, 10, slit channel, 11, notch, 12, circular baffle, 13, baffle bracket, 14, baffle opening;

[0019] 1.1, bottom plate, 1.2, side plate, 1.3, end plate;

[0020] 1.2.1, inner wall, 1.2.2, interlayer, 1.2.3, outer wall. DETAILED DESCRIPTION

[0021] The utility model will be further described below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 3As shown, the novel sandwich type battery pack box cover comprises a box cover body 1, an annular connector 3 is connected to the opening of the box cover body 1, the box cover body 1 is composed of a bottom plate 1.1 and a side plate 1.2 and an end plate 1.3 located above the bottom plate 1.1, the side plates 1.2 and the end plates 1.3 are respectively provided with two groups, and are symmetrically distributed, the side plate 1.2 comprises an inner wall 1.2.1 and an outer wall 1.2.3, an interlayer 1.2.2 is formed between the inner wall 1.2.1 and the outer wall 1.2.3, an air inlet 2 is provided on the outer wall 1.2.3, and an air outlet 4 is provided on one of the end plates 1.3, and further, the bottom plate 1.1 and the end plate 1.3 can adopt a double-layer structure design with an air interlayer according to the use requirements;

[0023] There are multiple groups of tracks 5 evenly distributed along the length direction on the inner wall 1.2.1, and slideways 7 are formed between adjacent tracks 5. A slit channel 10 is provided on the inner wall 1.2.1 corresponding to the slideway 7. Slide baffles 6 are symmetrically slidably connected at both ends of the slideway 7. The slide baffles 6 are connected to a memory alloy 8. The other end of the memory alloy 8 is connected to a fixed block 9, and the fixed block 9 is connected to the inner wall 1.2.1.

[0024] The memory alloy 8 is used as a power source, and its high-temperature expansion and low-temperature contraction characteristics are utilized to control the movement of the sliding plate baffle 6, thereby realizing the switch control of the slot channel 10.

[0025] In order to allow the air entering through the air inlet 2 to be evenly distributed in the interlayer 1.2.2 and enter the interior of the box cover body 1 through the slit channel 10, further, a circular baffle 12 is provided in the interlayer 1.2.2 corresponding to the air inlet 2, and a baffle bracket 13 is connected to one side of the circular baffle 12, and the other end of the baffle bracket 13 is fixed on the outer wall 1.2.3. The air is blocked by the circular baffle 12 to form a uniform distribution effect.

[0026] Furthermore, the circular baffle 12 is provided with baffle openings 14 to achieve a more comprehensive air distribution effect.

[0027] In order to facilitate the control of the movement of the sliding plate baffle 6 , preferably, the cross section of the track 5 is a T-shaped structure, which cooperates with the inner wall 1 . 2 . 1 to form a slideway 7 to constrain the sliding plate baffle 6 .

[0028] When the memory alloy 8 controls the relative movement of the sliding plate baffle 6 to close the slit channel 10 , in order to avoid interference from the fixing block 9 , a notch 11 is further reserved on the sliding plate baffle 6 corresponding to the fixing block 9 .

[0029] When the utility model is used specifically: when the temperature inside the battery pack is high, the memory alloy 8 will control the two sliding baffles 6 to move to the position where the opening of the slit channel 10 is the largest, so that the air flow rate blown out from the slit channel 10 can be maximized, and the battery pack can be cooled; when the temperature inside the battery pack is low, the memory alloy 8 will gradually control the two sliding baffles 6 to move to the position where the opening of the slit channel 10 becomes smaller. As the temperature continues to decrease, the slit channel 10 will eventually close. At this time, the air in the interlayer 1.2.2 on both sides of the box cover body 1 will not come into contact with the air in other areas, and there is no entrance or exit, that is, a static air layer. Because the thermal conductivity of static air is extremely low, the air in the interlayer 1.2.2 at this time is a natural thermal insulation layer, which can isolate the heat exchange inside and outside the battery pack.

Claims

1. A novel sandwich type battery pack box cover, comprising a box cover body (1), wherein the opening of the box cover body (1) is connected to a ring-shaped connecting piece (3), characterized in that: The box cover body (1) is composed of a bottom plate (1.1) and side plates (1.2) and end plates (1.3) located above the bottom plate (1.1); the side plates (1.2) and end plates (1.3) are provided in two groups respectively and are symmetrically distributed; the side plates (1.2) include an inner wall (1.2.1) and an outer wall (1.2.3); an interlayer (1.2.2) is formed between the inner wall (1.2.1) and the outer wall (1.2.3); an air inlet (2) is provided on the outer wall (1.2.3); and an air outlet (4) is provided on one of the end plates (1.3); A plurality of groups of tracks (5) are evenly distributed along the length direction on the inner wall (1.2.1), and a slideway (7) is formed between adjacent tracks (5). A slit channel (10) is provided on the inner wall (1.2.1) corresponding to the slideway (7). Slide baffles (6) are symmetrically slidably connected at both ends of the slideway (7). A memory alloy (8) is connected to the slide baffle (6). The other end of the memory alloy (8) is connected to a fixed block (9), and the fixed block (9) is connected to the inner wall (1.2.1).

2. The novel sandwich battery pack cover according to claim 1 is characterized in that: A circular baffle (12) is provided in the interlayer (1.2.2) corresponding to the air inlet (2), one side of the circular baffle (12) is connected to a baffle bracket (13), and the other end of the baffle bracket (13) is fixed to the outer wall (1.2.3).

3. The novel sandwich battery pack cover according to claim 2 is characterized in that: The circular baffle (12) is provided with a baffle opening (14).

4. The novel sandwich battery pack cover according to claim 1 or 2, characterized in that: The track (5) has a T-shaped cross section and cooperates with the inner wall (1.2.1) to form a slideway (7) to constrain the sliding plate baffle (6).

5. The novel sandwich battery pack cover according to claim 1 or 2, characterized in that: A notch (11) is reserved on the sliding plate baffle (6) corresponding to the fixing block (9).

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