Fixed connection structure of double-layer battery cell module and battery pack box body

Abstract

The utility model relates to the technical field of battery packs, in particular to a fixed connection structure of a double-layer battery cell module and a battery pack box body, which comprises the double-layer battery cell module and the battery pack box body, the double-layer battery cell module comprises an upper-layer battery cell module and a lower-layer battery cell module which are stacked up and down, the upper-layer battery cell module comprises an upper-layer battery cell module bearing plate arranged on the bottom side, and the lower-layer battery cell module comprises a lower-layer battery cell module bearing plate arranged on the bottom side. The lower-layer battery cell module comprises a lower-layer battery cell module bearing plate arranged on the bottom side; an embedding groove for placing the lower-layer battery cell module bearing plate is formed in a box body bottom plate of the battery pack box body, symmetrical supporting rib plates are arranged on the inner walls of a pair of long side edges of the box body, and the surfaces of the two supporting rib plates can support and fixedly connect the upper-layer battery cell module bearing plate. The fixed connection structure is simple in structure, can greatly facilitate the assembly of the double-layer battery cell module and the battery pack box body, can effectively improve the assembly efficiency while ensuring the stability of the double-layer battery cell module and the battery pack box body, and does not occupy the heat dissipation space between the battery cell module and the box body.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field especially relates to a double -deck electric core module and the fixed connection structure of battery pack box. BACKGROUND

[0002] At present, new energy vehicles because its excellent environmental protection performance, receive the extensive attention of all circles of society, and the requirement of new energy vehicles is also constantly improving, as a kind of new energy vehicles, electric vehicle is also developing towards high safety, high energy ratio, light weight. And the main factor that determines the electric vehicle driving range is the power supply battery. Different vehicle models can use different specifications of power supply batteries to achieve driving requirements.

[0003] The power supply battery for electric vehicles is generally a battery pack composed of multiple cell modules, that is, multiple cell modules are stacked in the same box, and then the cell modules are connected. As the core, the cell module generally configures a corresponding number of cells according to the size of the required output voltage, and then connects all the cells for voltage output.

[0004] For the longitudinally stacked cell module, as it increases the height of the battery, in order to enable it to be stably installed in the battery pack box, the commonly used way is to process a box that can wrap the side of the cell module, that is, to stably install it in the battery pack box by extruding the gap between the box and the cell module, but it is not conducive to the heat dissipation of the cell module in work, and thus it is easy to cause safety hazards due to high temperature in the box.

[0005] Another way is to directly set a mounting position matching the bottom of the cell module at the bottom of the box. For the space between the longitudinally stacked cell module and the inner wall of the box, a filler is used to fill it. Although it can temporarily prevent the cell module from shifting in the box, it is not suitable for long-term use. The filler will inevitably change in quality in a high-temperature environment for a long time, thereby affecting the fixing effect, and the assembly of the cell module and the battery pack box is also very cumbersome, affecting the assembly efficiency.

[0006] Therefore, a new technical solution is needed to solve the above technical problems. UTILITY MODEL CONTENT

[0007] The utility model aims at overcoming the problems of the prior art, and provides a fixed connection structure of double-layer cell module and battery pack box, which solves the technical problems that the longitudinally stacked cell module in the prior art cannot be stably installed in the battery pack box, and is not easy to be quickly assembled with the battery pack box.

[0008] The above-mentioned purpose is achieved by the following technical solutions:

[0009] The utility model provides a kind of fixed connection structure of double-layer battery cell module and battery pack box, including double-layer battery cell module and battery pack box The double-layer battery cell module includes upper layer battery cell module and lower layer battery cell module stacked upside down, the upper layer battery cell module includes the upper layer battery cell module bearing plate arranged at bottom side, and the lower layer battery cell module includes the lower layer battery cell module bearing plate arranged at bottom side;The box bottom plate of the battery pack box is provided with the embedding slot for the lower layer battery cell module bearing plate, and the support rib plate is provided on the inner wall of a pair of box long side, and the surface of two support rib plates can support and fix the upper layer battery cell module bearing plate.

[0010] Further, the inner wall of the two box long sides is provided with the symmetric stop bar adjacent to the position of the box bottom plate, and the embedding slot is formed between the two stop bars and the box bottom plate.

[0011] Further, the distance between the two support rib plates is not less than the width of the embedding slot.

[0012] Further, the support rib plate is a rib strip with a right triangle cross section, including a first right angle side, a second right angle side and a hypotenuse connected with each other, the first right angle side is used for being attached to the inner wall of the box long side, and the second right angle side is used for placing the upper layer battery cell module bearing plate.

[0013] Further, a plurality of rib strip fixing holes are formed on the hypotenuse.

[0014] Further, the second right angle side and the upper layer battery cell module bearing plate are respectively provided with the bearing plate connecting hole corresponding to each other, and are connected by bearing plate screw.

[0015] Further, the support rib plate is welded to the inner wall of the box long side.

[0016] Further, the upper layer battery cell module bearing plate and the lower layer battery cell module bearing plate are both liquid cooling plates, and are used for cooling and radiating the upper layer battery cell module and the lower layer battery cell module respectively.

[0017] Beneficial effects

[0018] The fixed connection structure of double-layer battery cell module and battery pack box provided by the utility model realizes the stable support of the bottom and middle part of the double-layer battery cell module vertically stacked by arranging the embedding slot on the bottom plate of the battery pack box and symmetrically arranging the support rib plate on the two box long sides. The fixed connection structure is not only simple in structure, but also greatly facilitates the assembly of the double-layer battery cell module and the battery pack box. While ensuring the stability of the two, the assembly efficiency is effectively improved, and the heat dissipation space between the battery cell module and the box is not occupied. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A cross-sectional structure schematic view of the fixed connection structure of the double-layer battery cell module and the battery pack box body according to the utility model;

[0020] Figure 2 A cross-sectional structure schematic view of the fixed connection structure of the double-layer battery cell module and the battery pack box body according to the utility model;

[0021] Figure 3 A structure schematic view of the fixed connection structure of the double-layer battery cell module and the battery pack box body according to the utility model;

[0022] Figure 4 An assembly schematic view of the fixed connection structure of the double-layer battery cell module and the battery pack box body according to the utility model.

[0023] Illustration mark:

[0024] 1-double-layer battery cell module, 101-upper layer battery cell module, 102-lower layer battery cell module, 103-upper layer battery cell module bearing plate, 104-lower layer battery cell module bearing plate;

[0025] 2-battery pack box body, 201-embedded groove, 202-box long side, 203-box bottom plate;

[0026] 3-supporting rib plate, 301-first right angle side, 302-second right angle side, 303-oblique side, 304-rib fixed hole;

[0027] 4-stop strip;

[0028] 5-bearing plate connecting hole;

[0029] 6-bearing plate screw. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail according to the drawings and examples. The described example is only a part of the utility model example, and is not all examples. Based on the example in the utility model, all other examples obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0031] As Figure 1 And Figure 2As shown, the present scheme provides a kind of double-layer battery cell module and the fixed structure of battery pack box, including double-layer battery cell module 1 and battery pack box 2, it is characterized in that, the double-layer battery cell module 1 includes upper and lower stacked upper layer battery cell module 101 and lower layer battery cell module 102, the upper layer battery cell module 101 includes the upper layer battery cell module bearing plate 103 of being arranged at bottom side, the lower layer battery cell module 102 includes the lower layer battery cell module bearing plate 104 of being arranged at bottom side;

[0032] The box bottom plate 203 of the battery pack box 2 is provided with the embedding groove 201 for the lower layer battery cell module bearing plate 104, and the mutually symmetrical support rib plate 3 is provided on the inner wall of a pair of box long side 202, the surface of two support rib plates 3 can support and fix the upper layer battery cell module bearing plate 103.

[0033] In this structure, the assembly of double-layer battery cell module 1 and battery pack box 2 has two ways, including:

[0034] The first way: the lower layer battery cell module bearing plate 104 is installed in the embedding groove 201 in advance, and then the installation of the lower layer battery cell module 102 is completed;Then the two sides of the upper layer battery cell module bearing plate 103 are respectively attached to the surface of two support rib plates 3, the fixation is completed, and then the fixation of the upper layer battery cell module 101 and the support rib plate 3 is realized.It should be noted that the upper layer battery cell module 101 and the lower layer battery cell module 102 are longitudinally stacked to form an integral whole in the embodiment, so that the battery pack box 1 can be fixed to the double-layer battery cell module 1 under the action of the embedding groove 201 at the bottom of the battery pack box 2 and the support rib plate 3 on the inner wall of the box long side plate 202.

[0035] The second way: the upper layer battery cell module 101 and the lower layer battery cell module 102 are stacked and connected with each other in advance, and then directly placed into the battery pack box 2, until the bottom of the double-layer battery cell module 1 is embedded in the embedding groove 201, i.e.the lower layer battery cell module bearing plate 104 is installed in the embedding groove 201;Since the width of the upper layer battery cell module bearing plate 103 is greater than the width of the lower layer battery cell module bearing plate 104, the upper layer battery cell module 101 is in contact with the surface of two support rib plates 3 at this time, and the upper layer battery cell module bearing plate 103 is fixed to the support rib plate 3 through fasteners.

[0036] As the constituting way of the embedding groove 201 in the embodiment, as shown in Figure 3 And Figure 4 As shown, the mutually symmetrical blocking bar 4 is arranged on the inner wall of the two box long sides 202 and adjacent to the box bottom plate 203, and the embedding groove 201 is formed between the two blocking bars 4 and the box bottom plate 203.

[0037] The two stop bars 4 symmetrical to each other can limit and clamp the two sides of the lower battery cell module carrying plate 104, thereby ensuring that the double-layer battery cell module 1 is accurately positioned in the middle of the battery pack box 2.

[0038] It should be noted that the distance between the two support rib plates 3 in the embodiment is not less than the width of the embedded groove 201, so that the lower battery cell module carrying plate 104 can be smoothly placed in the embedded groove 201 at the bottom of the battery pack box 2 without obstruction.

[0039] In the embodiment, the support rib plate 3 is a rib with a straight triangular cross section, including a first right angle side 301, a second right angle side 302 and a hypotenuse 303 connected to each other, the first right angle side 301 is used to fit with the inner wall of the box long side 202, and the second right angle side 302 is used to place the upper battery cell module carrying plate 103.

[0040] Through the straight triangular structure, stable support of the upper battery cell module carrying plate 103 and stable fixation of the entire double-layer battery cell module 1 can be achieved.

[0041] As the connection mode of the support rib plate 3 and the box long side, the embodiment provides two modes, including:

[0042] Mode one

[0043] A plurality of rib fixing holes 304 are formed on the hypotenuse 303, so that the rib screw can connect the support rib plate 3 and the box long side 202 through the rib fixing hole 304.

[0044] Mode two

[0045] The support rib plate 3 is welded with the inner wall of the box long side 202.

[0046] In addition, as the connection optimization of the upper battery cell module carrying plate 103 and the support rib plate 3, the embodiment is provided with a carrying plate connection hole 5 corresponding to each other on the second right angle side 302 and the upper battery cell module carrying plate 103, and the carrying plate screw 6 is used for connection, so that the upper battery cell module carrying plate 103 is stably connected with the support rib plate 3.

[0047] As another optimization of the embodiment, the upper battery cell module carrying plate 103 and the lower battery cell module carrying plate 104 are both liquid cooling plates, which are used for liquid cooling and heat dissipation of the upper battery cell module 101 and the lower battery cell module 102 respectively, so as to ensure that the heat generated during the operation of the battery cell module 1 is cooled in time, and the best working environment is provided for the battery cell module.

[0048] The above merely illustrates the embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A structure for connecting a double-layer battery cell module and a battery pack case, comprising a double-layer battery cell module (1) and a battery pack case (2), characterized in that, The double-layer battery cell module (1) comprises an upper-layer battery cell module (101) and a lower-layer battery cell module (102) stacked one above the other, the upper-layer battery cell module (101) comprises an upper-layer battery cell module bearing plate (103) arranged on the bottom side, and the lower-layer battery cell module (102) comprises a lower-layer battery cell module bearing plate (104) arranged on the bottom side; The battery pack box body (2) is provided with an embedding groove (201) for placing the lower-layer battery cell module bearing plate (104) on the box body bottom plate (203), and a pair of mutually symmetrical support rib plates (3) are arranged on the inner walls of a pair of box body long side edges (202), the surfaces of the two support rib plates (3) can support and fix the upper-layer battery cell module bearing plate (103).

2. The structure for connecting the dual-layer battery cell module to the battery pack case according to claim 1, wherein The two support rib plates (3) are arranged on the inner walls of the two box body long side edges (202) and adjacent to the box body bottom plate (203), and the embedding groove (201) is formed between the two support rib plates (3) and the box body bottom plate (203).

3. The structure for connecting the double-layer battery cell module to the battery pack case according to claim 1 or 2, wherein The distance between the two support rib plates (3) is not less than the width of the embedding groove (201).

4. The dual-layer battery cell module and battery pack case fastening structure of claim 1, wherein, The support rib plate (3) is a rib strip with a straight triangle cross section, comprising a first straight angle (301), a second straight angle (302) and a hypotenuse (303) connected with each other, the first straight angle (301) is used for abutting with the inner wall of the box body long side edge (202), and the second straight angle (302) is used for placing the upper-layer battery cell module bearing plate (103).

5. The structure of claim 4, wherein, A plurality of rib strip fixing holes (304) are arranged on the hypotenuse (303).

6. The structure for fastening the dual-layer battery cell module to the battery pack case according to claim 4 or 5, wherein The second straight angle (302) and the upper-layer battery cell module bearing plate (103) are respectively provided with mutually corresponding bearing plate connecting holes (5), and the bearing plate connecting holes (5) are connected by bearing plate screws (6).

7. The structure for connecting the double-layer battery cell module and the battery pack case according to claim 1 or 4, wherein The support rib plate (3) is welded with the inner wall of the box body long side edge (202).

8. The dual-layer battery cell module and battery pack case fastening structure of claim 1, wherein, The upper-layer battery cell module bearing plate (103) and the lower-layer battery cell module bearing plate (104) are both liquid cooling plates, and are respectively used for liquid cooling and heat dissipation of the upper-layer battery cell module (101) and the lower-layer battery cell module (102).

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