CN209461513U - Double-layer module mounting bracket for battery pack and battery pack - Google Patents

Abstract

The utility model provides the double-mold group mounting bracket and battery pack of a kind of battery pack, the double-mold group mounting bracket of battery pack includes: rack body, rack body includes first crossbeam, second cross beam and support panel, first crossbeam is oppositely arranged with second cross beam, the first mounting hole and the second mounting hole are provided on first crossbeam and second cross beam, first mounting hole is used to be cooperatively connected with the supporting beam in battery pack, and the second mounting hole is suitable for connecting with battery modules in battery pack；Support panel is connected between first crossbeam and second cross beam.Thus, pass through first crossbeam, second cross beam and support panel cooperation, it can be improved the space utilization rate and energy density in battery pack, also the assembly process of battery pack can be reduced, the productive temp of battery pack can be promoted, also, double-mold group mounting bracket and existing battery modules are with regard to achievable assembly, it does not need to develop new battery modules, the development cost of battery pack can be reduced.

Description

Double-layer module mounting bracket for battery pack and battery pack

technical field

The utility model relates to the technical field of batteries, in particular to a double-layer module mounting bracket of a battery pack and a battery pack having the double-layer module mounting bracket of the battery pack.

Background technique

With the vigorous development of the new energy industry, in the face of the growing demand for battery modules, the country has put forward higher requirements for the energy density and group efficiency of the battery system. The power battery system is used as the energy storage and power output device of electric vehicles. , is the power source of the electric vehicle and the guarantee of its endurance. Affected by the space structure of the whole vehicle, the height of the battery pack will be limited to a certain extent, generally not more than 150mm, and there will be a relatively high space under the rear passenger seat. In order to ensure the battery life of the electric vehicle, it will be here. For the arrangement of double-layer modules, the two-layer modules need to be connected by brackets. The brackets must ensure the installation and safety of the modules, and at the same time, the utilization of space must be considered.

In the related art, the current module bracket designs are generally as follows: one is to achieve the effect of double-layer support by assembling multiple parts, and the disadvantage is that the installation process is relatively cumbersome; one is that the module needs to open two sets of installation holes One set is used to fix the lower module, and the other set is used to fix the upper module. The disadvantage is that new modules need to be developed. Most of the existing brackets are sheet metal parts or castings, the sheet metal parts are cumbersome to install, the castings are relatively heavy and costly, and the space utilization rate of the existing brackets is low.

Utility model content

In view of this, the present invention aims to provide a double-layer module mounting bracket for a battery pack, which can solve the problem of complicated installation process of the existing bracket, and can also solve the problem of low space utilization rate of the existing bracket.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A double-layer module mounting bracket for a battery pack includes: a bracket main body, the bracket main body includes a first beam, a second beam and a support panel, the first beam and the second beam are oppositely arranged and spaced apart, so A first installation hole and a second installation hole are provided on the first beam and the second beam, the first installation hole is used for cooperating with the support beam in the battery pack, and the second installation hole is suitable for connected with the battery module in the battery pack; the support panel is connected between the first beam and the second beam, and the support panel is used to support the battery module.

In some examples of the present invention, along the width direction of the support body, the cross section of the support body is configured as an "H" shape; the thicknesses of the first beam and the second beam are the same as the thickness of the support The thickness of the beams is the same; the first beam and the second beam are provided with a plurality of weight-reducing holes, and there are connecting parts between the adjacent weight-reducing holes, and the connecting parts are along the length of the bracket body. Arranged in the height direction, the second installation hole is arranged on the first beam and the upper beam of the second beam and is arranged corresponding to the connecting part; the first installation hole is arranged on the first beam , The lower transverse arm of the second beam is arranged corresponding to the weight reduction hole; the first transverse beam and the lower transverse arm of the second transverse beam are provided with first escape grooves, and the first An escape groove is correspondingly provided with the connecting portion and the second mounting hole.

In some examples of the present invention, the double-layer module mounting bracket of the battery pack further comprises: a heat shield, the heat shield is arranged below the support panel, and the support panel is an aluminum plate.

In some examples of the present invention, the double-layer module mounting bracket of the battery pack further includes: a slave control board support and a third beam, the first end of the slave control board support is connected to the connecting portion, The second end of the slave control board bracket is connected with the first end of the third beam; the slave control board bracket includes: a plurality of slave control board sub-brackets, and a plurality of the slave control board sub-brackets are spaced apart, the The sub-bracket of the slave control board is arranged corresponding to the connecting part.

In some examples of the present invention, the third beam has a third installation hole, and the third installation hole is suitable for being connected with the support beam; the third beam is provided with a weight-reducing groove, and the reducing The weight slot is located between the adjacent slave control board sub-brackets, the third installation hole is arranged in the weight reduction slot; the third beam is arranged with a second avoidance slot, and the second avoidance slot is arranged in the At the second end of the third beam, the second escape groove is correspondingly arranged with the slave control board sub-bracket.

Compared with the prior art, the double-layer module mounting bracket of the battery pack of the present invention has the following advantages:

According to the double-layer module mounting bracket of the battery pack of the present invention, through the cooperation of the first beam, the second beam and the support panel, the space utilization rate and energy density in the battery pack can be improved, and the assembly process of the battery pack can also be reduced. The production cycle of the battery pack can be improved, and the double-layer module mounting bracket can be assembled with the existing battery module without the need to develop a new battery module, which can reduce the development cost of the battery pack.

Another object of the present invention is to provide a double-layer module mounting bracket for a battery pack.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A double-layer module mounting bracket for a battery pack includes: a bracket body, the bracket body includes a first beam, a second beam and a support panel, the support panel is arranged on the first beam and the second beam. On the upper end, the first beam and the second beam are arranged along the length direction of the support panel, the first beam is arranged on the first end of the support panel, and the second beam is arranged on the support panel The second end of the panel, the first end is opposite to the second end, the upper surface of the support panel is provided with a plurality of module mounting parts, and each of the module mounting parts is provided with a first mounting hole , the first installation hole is suitable for connecting with the battery module in the battery pack, and a plurality of the module installation parts form two rows. One row of the module mounting parts is arranged on the upper surface of the first end of the support panel, and the other row of the module installation parts is arranged on the upper surface of the second end of the support panel. Each row of the modules In the installation parts, the adjacent module installation parts are spaced apart, and a second installation hole is arranged between the adjacent module installation parts, and the first installation hole is suitable for the support in the battery pack. Beam mate connection.

In some examples of the present invention, the second installation hole is disposed opposite to the first beam and the second beam, and simultaneously penetrates the support panel, the first beam, and the second beam, A bushing is arranged in the second installation hole.

In some examples of the present invention, both the first beam and the second beam are provided with weight-reducing holes, and the weight-reducing holes are correspondingly arranged with the module mounting portion.

In some examples of the present invention, both the first beam and the second beam are provided with a first avoidance groove, the first avoidance groove is disposed below the weight reduction hole, and the module mounting portion , the weight reduction hole and the first avoidance groove are correspondingly arranged; the upper end of the module installation part is provided with a positioning groove, and the first installation hole is arranged in the positioning groove.

Compared with the prior art, the double-layer module mounting bracket of the battery pack of the present invention has the following advantages:

According to the double-layer module mounting bracket of the battery pack of the present invention, through the cooperation of the first beam, the second beam and the support panel, the space utilization rate and energy density in the battery pack can be improved, and the assembly process of the battery pack can also be reduced. The production cycle of the battery pack can be improved, and the double-layer module mounting bracket can be assembled with the existing battery module without the need to develop a new battery module, which can reduce the development cost of the battery pack.

Another object of the present invention is to provide a battery pack.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A battery pack includes the above-mentioned double-layer module mounting bracket for the battery pack.

The battery pack and the double-layer module mounting bracket of the battery pack have the same advantages over the prior art, which will not be repeated here.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of a battery module provided with side mounting ears according to an embodiment of the present invention;

2 is a schematic diagram of a battery module according to an embodiment of the present invention provided with a side mounting edge;

3 is a schematic diagram of a specific embodiment of the double-layer module mounting bracket according to the embodiment of the present invention;

4 is an assembly schematic diagram of a double-layer module mounting bracket, a battery module, and a support beam according to an embodiment of the present invention;

5 is a schematic diagram of another specific embodiment of the double-layer module mounting bracket according to the embodiment of the present invention;

6 is a schematic diagram of the assembly of the double-layer module mounting bracket and the battery module according to the embodiment of the present invention.

Description of reference numbers:

Double-layer module mounting bracket 10;

Bracket main body 1; first beam 11; second beam 12; support panel 13; first installation hole 14; second installation hole 15; weight reduction hole 16;

The first avoidance groove 2; the heat insulation plate 3;

Slave control board bracket 4; Slave control board sub-support 41;

The third beam 5; the third mounting hole 51; the weight reduction groove 52; the second avoidance groove 53;

Module mounting part 6; Bushing 7; Positioning groove 8;

Battery module 20 ; side mounting ears 201 ; side mounting edges 202 ; support beam 30 .

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIGS. 1-6 , a double-layer module mounting bracket 10 for a battery pack according to an embodiment of the present invention includes: a bracket body 1 , and the bracket body 1 may include: a first beam 11 , a second beam 12 and a support panel 13. The first beam 11 and the second beam 12 are arranged opposite to each other, and the first beam 11 and the second beam 12 are spaced apart. The first beam 11 and the second beam 12 can both be provided with a first installation hole 14 and a second installation hole 15 , the first mounting hole 14 can be used to connect with the support beam 30 in the battery pack, the second mounting hole 15 is suitable for connecting with the battery module 20 in the battery pack, and the support panel 13 can be connected to the first beam 11 and the second Between the beams 12 , the support panel 13 can be used to support the battery module 20 .

In addition, the battery module 20 adopts the side plate installation method in the following two forms: as shown in FIG. 2 , one is to use the side installation edge 202 for installation, that is, the module installation surface is a long plane, and the length is the same as that of the module side. As shown in Figure 1, the other is to use the measuring installation ears for installation, that is, the module installation surface is partially raised and spaced, and the double-layer module installation bracket 10 of the present application can be used for these two sides. The board mounting form can also be understood that the double-layer module mounting bracket 10 of the present application can be assembled with the existing battery module 20 without developing a new battery module 20, which can reduce the development cost of the battery pack.

The effect diagram of the double-layer module mounting bracket 10 installed on the battery pack is shown in FIG. 4 . The battery pack adopts a left-right symmetrical design, so two double-layer module mounting brackets 10 are used. The installation process is as follows: first, install the lower battery module 20 on the supporting beam 30 of the lower casing, fix the lower battery module 20 with mounting bolts, and then install the double-layer module mounting bracket 10 on the supporting beam 30, and use the installation Bolts pass through the first mounting holes 14 to fix the double-layer module mounting bracket 10 , and finally fix the upper-layer battery module 20 on the double-layer module mounting bracket 10 , and use mounting bolts to pass through the second mounting holes 15 to fix the upper-layer battery module 20. The assembly of the battery module 20 is completed. This arrangement can reduce the assembling process of the battery pack, and can improve the production tact time of the battery pack. Moreover, the double-layer module mounting bracket 10 of the present application is small in size, which can improve the space utilization rate of the battery pack, thereby improving the energy density of the battery pack. At the same time, the double-layer module mounting bracket 10 of the present application has a simple structure and is easy to produce. In addition, the upper and lower battery modules 20 of the battery pack are identical, which can realize the commonality of the whole pack of modules.

Therefore, through the cooperation of the first beam 11, the second beam 12 and the support panel 13, the space utilization rate and energy density in the battery pack can be improved, the assembly process of the battery pack can also be reduced, the production cycle of the battery pack can be improved, and , the double-layer module mounting bracket 10 can be assembled with the existing battery module 20 , and there is no need to develop a new battery module 20 , which can reduce the development cost of the battery pack.

In some embodiments of the present invention, along the width direction of the bracket main body 1, the cross-section of the bracket main body 1 is configured as an “H” shape. This configuration can improve the structural strength of the bracket main body 1. When the battery module 20 is assembled in the dual When the two-layer module mounting bracket 10 is installed, the double-layer module mounting bracket 10 can better support the battery module 20 , thereby ensuring a more stable installation of the battery module 20 .

In some embodiments of the present invention, the thicknesses of the first beam 11 and the second beam 12 are the same as the thickness of the support beam 30 , so that the first beam 11 and the second beam 12 can be easily assembled on the support beam 30 . , which can save assembly time.

In some embodiments of the present invention, as shown in FIG. 3 and FIG. 4 , the first beam 11 and the second beam 12 may be provided with a plurality of weight-reducing holes 16, and the weight-reducing holes 16 have a weight-reducing effect, so that The arrangement can reduce the weight of the double-layer module mounting bracket 10 , and can realize the lightweight design of the double-layer module mounting bracket 10 .

In some embodiments of the present invention, as shown in FIG. 3 and FIG. 4 , there may be connecting parts 17 between adjacent weight-reducing holes 16 , and the connecting parts 17 are arranged along the height direction of the bracket body 1 . The connecting portion 17 can ensure that the first beam 11 and the second beam 12 have sufficient structural strength, and can prevent the first beam 11 and the second beam 12 from being deformed, thereby ensuring the working reliability of the first beam 11 and the second beam 12 .

In some embodiments of the present invention, the second installation holes 15 may be arranged on the upper arms 18 of the first beam 11 and the second beam 12, and the second installation holes 15 and the connecting portion 17 may be correspondingly arranged, wherein, After the upper battery module 20 is assembled to the upper transverse arms 18 of the first transverse beam 11 and the second transverse beam 12 , the mounting bolts pass through the second mounting holes 15 . At this time, the second mounting holes 15 are arranged corresponding to the connecting portion 17 . When the mounting bolts pass through the second mounting holes 15 , the mounting bolts can be located in the connecting portion 17 , and the mounting bolts can be assembled more firmly.

In some embodiments of the present invention, a first avoidance groove 2 may be provided on the lower beams 19 of the first beam 11 and the second beam 12 . The first avoidance groove 2 is connected to the connecting portion 17 and the second installation hole 15 Corresponding arrangement, wherein, the first avoidance groove 2 has the avoidance function, when it is necessary to tighten or loosen the mounting bolts for fixing the lower battery module 20, by setting the first avoidance groove 2, it can be ensured that the mounting bolts can be smoothly tightened or loosened , so as to ensure the smooth completion of the assembly and disassembly of the battery pack.

In some embodiments of the present invention, as shown in FIG. 3 , the double-layer module mounting bracket 10 may further include: a heat shield 3 , and the heat shield 3 may be arranged below the support panel 13 , wherein the lower battery When the cells in the module 20 leak, the thermal runaway can be effectively prevented from affecting the upper battery module 20 by arranging the thermal insulation board 3. The thermal insulation board 3 can be made of mica sheet, basalt or other thermal insulation materials.

In some embodiments of the present invention, the support panel 13 can be set to be an aluminum plate, which can reduce the height of the rear double-layer battery modules 20 . When the height of the battery pack allows, the support panel 13 can also be designed with a molding cavity profile.

In some embodiments of the present invention, as shown in FIG. 3 and FIG. 4 , the double-layer module mounting bracket 10 may further include: a slave control board support 4 and a third beam 5 , the first end of the slave control board support 4 Connected to the connecting portion 17, the second end of the slave control board bracket 4 is connected to the first end of the third beam 5, the slave control board support 4 may include: a plurality of slave control board sub-brackets 41, and a plurality of slave control board sub-brackets 41 are spaced apart Open, the slave control board sub-bracket 41 is set corresponding to the connection part 17 .

Wherein, the slave control board bracket 4 and the connecting portion 17 are integrally formed parts, which can improve the overall structural strength of the double-layer module mounting bracket 10, and the slave control board bracket 4 can provide a mounting point for the slave control board. After the board is installed on the slave control board bracket 4, the slave control board bracket 4 can support the slave control board. The connecting part 17 plays a supporting role, and the sub-bracket 41 of the control board can provide the Y-direction supporting strength for the connecting part 17, which can improve the mode of the double-layer module mounting bracket 10, thereby preventing the double-layer module mounting bracket 10 from shaking. It should be noted that the Y direction refers to the front-rear direction in FIG. 3 .

In some embodiments of the present invention, as shown in FIG. 3 and FIG. 4 , the third beam 5 may have a third mounting hole 51 , and the third mounting hole 51 is suitable for being connected with the supporting beam 30 . When the cross beam 5 and the support beam 30 are assembled together, the third cross beam 5 and the support beam 30 can be stably assembled together by passing the mounting bolts through the third mounting holes 51, so that the assembly of the third cross beam 5 and the support beam 30 can be completed. After working, the double-layer module mounting bracket 10 can be reliably assembled on the support beam 30 .

In some embodiments of the present invention, as shown in FIG. 3 and FIG. 4 , the third beam 5 may be provided with a weight reduction slot 52 , and the weight reduction slot 52 may be located between adjacent slave control board sub-brackets 41 . The mounting hole 51 can be arranged on the bottom wall of the weight-reducing slot 52, wherein the weight-reducing slot 52 has a weight-reducing effect, and such setting can further reduce the weight of the double-layer module mounting bracket 10, and can further realize the double-layer module installation. Lightweight design of the bracket 10 .

In some embodiments of the present invention, the third beam 5 may be provided with a second avoidance groove 53, the second avoidance groove 53 may be disposed at the second end of the third beam 5, and the second avoidance groove 53 may be connected with the slave control board. The brackets 41 are provided correspondingly. The second avoidance groove 53 has an avoidance function. When the mounting bolts for fixing the lower battery module 20 need to be tightened or loosened, the second avoidance groove 53 can be provided to ensure that the mounting bolts can be smoothly tightened or loosened, so that the Ensure that the assembly and disassembly of the battery pack is completed smoothly.

In some embodiments of the present invention, the double-layer module mounting bracket 10 of the present application can be integrally formed with an aluminum profile, and the wall thickness of the aluminum profile where the mounting hole is located is 8-12 mm, for example: the wall thickness of the aluminum profile where the mounting hole is located It is 10mm, which can make the double-layer module mounting bracket 10 meet the strength requirements. However, the present invention is not limited to this, and the material of the double-layer module mounting bracket 10 can also be set to the same material as the aluminum profile.

As shown in FIG. 5 and FIG. 6 , the double-layer module mounting bracket 10 according to the embodiment of the present invention includes: a bracket body 1 . The bracket body 1 may include a first beam 11 , a second beam 12 and a support panel 13 . The beam 11 , the second beam 12 and the support panel 13 are all set as cavity-type aluminum profiles. The support panel 13 may be disposed on the upper ends of the first cross beam 11 and the second cross beam 12 , the first cross beam 11 and the second cross beam 12 are arranged along the length direction of the support panel 13 , and the first cross beam 11 may be disposed at the first end of the support panel 13 The second beam 12 can be arranged on the lower surface of the second end of the support panel 13, the first end and the second end can be arranged opposite to each other, and the upper surface of the support panel 13 can be provided with a plurality of module mounting parts 6, each Each module mounting portion 6 may be provided with a first mounting hole 14, and the first mounting hole 14 is suitable for connecting with the battery module 20 in the battery pack.

In addition, the plurality of module mounting portions 6 may form two rows, one row of module mounting portions 6 may be arranged on the upper surface of the first end of the support panel 13 , and the other row of module mounting portions 6 may be arranged on the upper surface of the support panel 13 . On the upper surface of the second end, the adjacent module installation parts 6 in each row of module installation parts 6 are arranged at intervals, and a second installation hole 15 may be provided between the adjacent module installation parts 6. The second installation hole 15 It is suitable for connecting with the support beam 30 in the battery pack.

The effect diagram of the installation of the double-layer module mounting bracket 10 and the battery module 20 is shown in FIG. 6 . The installation process is as follows: fix the upper-layer battery module 20 on the double-layer module mounting bracket 10 , and use mounting bolts to pierce The upper battery module 20 is fixed through the first mounting hole 14 to complete the assembly of the battery module 20 . This arrangement can reduce the assembling process of the battery pack, and can improve the production tact time of the battery pack. Moreover, the double-layer module mounting bracket 10 of the present application is small in size, which can improve the space utilization rate of the battery pack, thereby improving the energy density of the battery pack. At the same time, the double-layer module mounting bracket 10 of the present application has a simple structure and is easy to produce. In addition, the upper and lower battery modules 20 of the battery pack are identical, which can realize the commonality of the whole pack of modules.

In some embodiments of the present invention, as shown in FIG. 5 and FIG. 6 , the second installation hole 15 may be arranged opposite to the first beam 11 and the second beam 12 , the second installation hole 15 is a through-slot hole, and the first The two installation holes 15 penetrate through the support panel 13 , the first beam 11 and the second beam 12 at the same time, and a bushing 7 or a steel pipe can be provided in the second installation hole 15 . The bushing 7 or the steel pipe can increase the installation strength. After the mounting bolts pass through the bushing 7 or the steel pipe in the second mounting hole 15 , the double-layer module mounting bracket 10 can be reliably assembled on the support beam 30 .

In some embodiments of the present invention, as shown in FIG. 5 and FIG. 6 , both the first beam 11 and the second beam 12 may be provided with weight-reducing holes 16 , and the weight-reducing holes 16 are correspondingly arranged with the module mounting portion 6 . The weight-reducing hole 16 has a weight-reducing effect, and such arrangement can reduce the weight of the double-layer module mounting bracket 10 , and can realize a lightweight design of the double-layer module mounting bracket 10 .

In some embodiments of the present invention, as shown in FIG. 5 and FIG. 6 , both the first beam 11 and the second beam 12 may be provided with a first avoidance groove 2 , and the first avoidance groove 2 may be disposed in the weight reduction hole 16 Below the module mounting part 6, the weight-reducing hole 16, and the first avoidance groove 2 are correspondingly arranged, wherein the first avoidance groove 2 has the avoidance function. By arranging the first avoidance groove 2, it can be ensured that the installation bolts can be smoothly tightened or loosened, so that the assembly and disassembly of the battery pack can be smoothly completed.

In some embodiments of the present invention, as shown in FIG. 5 and FIG. 6 , the upper end of the module mounting portion 6 may be provided with a positioning slot 8 , and the first mounting hole 14 is arranged in the positioning slot 8 . Wherein, during the installation process of the upper battery module 20, if automatic production is adopted, visual alignment can be used, and the robot can automatically grab and install; if manual production is adopted, the battery module 20 and the double-layer module installation bracket need to be manually aligned The mounting holes of 10 are difficult to operate. Therefore, the positioning grooves 8 are designed on the double-layer module mounting bracket 10, which can facilitate the assembly of the battery module 20 to the module mounting portion 6, which can improve the assembly efficiency.

The battery pack according to the embodiment of the present invention includes the double-layer module mounting bracket 10 of the above-mentioned embodiment, and the double-layer module mounting bracket 10 is arranged and installed on the battery pack, and the battery pack can improve the space utilization rate and The energy density can also reduce the assembly process of the battery pack, which can improve the production cycle of the battery pack. Moreover, the double-layer module mounting bracket 10 and the existing battery module 20 can be assembled, and there is no need to develop a new battery module. 20. The development cost of the battery pack can be reduced.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. A double-layer module mounting bracket (10) for a battery pack, characterized in that it comprises: a bracket main body (1), the bracket main body (1) comprising a first beam (11), a second beam (12) and a support panel (13), the first beam (11) is arranged opposite and spaced apart from the second beam (12), both of which are provided on the first beam (11) and the second beam (12) There are a first mounting hole (14) and a second mounting hole (15), the first mounting hole (14) is used for mating connection with the support beam (30) in the battery pack, and the second mounting hole (15) The support panel (13) is connected between the first beam (11) and the second beam (12), and the support panel ( 13) for supporting the battery module (20). 2. The double-layer module mounting bracket (10) for a battery pack according to claim 1, characterized in that, along the width direction of the bracket main body (1), the cross-section of the bracket main body (1) is configured as "H" type; The thicknesses of the first beam (11) and the second beam (12) are the same as the thickness of the support beam (30); The first beam (11) and the second beam (12) are provided with a plurality of weight reduction holes (16), and a connecting portion (17) is provided between the adjacent weight reduction holes (16), The connecting portion (17) is arranged along the height direction of the bracket main body (1), and the second mounting hole (15) is arranged on the top of the first beam (11) and the second beam (12) provided on the transverse arm (18) and corresponding to the connecting portion (17); The first mounting holes (14) are arranged on the lower transverse arms (19) of the first beam (11) and the second beam (12) and are arranged corresponding to the weight reduction holes (16); A first escape groove (2) is provided on the lower transverse arms (19) of the first beam (11) and the second beam (12), and the first escape groove (2) is connected to the The connecting portion (17) and the second mounting hole (15) are correspondingly arranged. 3 . The double-layer module mounting bracket ( 10 ) for a battery pack according to claim 1 , further comprising: a heat insulating plate ( 3 ), wherein the heat insulating plate ( 3 ) is arranged on the support panel. 4 . Below (13), the support panel (13) is an aluminum plate. 4. The double-layer module mounting bracket (10) of the battery pack according to claim 2, characterized in that, further comprising: a slave control board support (4) and a third beam (5), the slave control board support The first end of (4) is connected to the connecting portion (17), and the second end of the slave control board bracket (4) is connected to the first end of the third beam (5); The slave control board bracket (4) includes: a plurality of slave control board sub-brackets (41), a plurality of the slave control board sub-brackets (41) are spaced apart, and the slave control board sub-brackets (41) are connected to the connecting portion ( 17) Corresponding settings. 5 . The double-layer module mounting bracket ( 10 ) for a battery pack according to claim 4 , wherein the third beam ( 5 ) has a third mounting hole ( 51 ), and the third mounting hole ( 51) is adapted to be connected with the support beam (30); The third beam (5) is provided with a weight reduction groove (52), the weight reduction groove (52) is located between the adjacent sub-brackets (41) of the slave control board, and the third installation hole (51) arranged in the weight-reducing groove (52); The third beam (5) is provided with a second avoidance groove (53), the second avoidance groove (53) is arranged at the second end of the third beam (5), and the second avoidance groove (53) ) is set corresponding to the sub-bracket (41) of the slave control board. 6. A double-layer module mounting bracket (10) for a battery pack, characterized by comprising: a bracket main body (1), the bracket main body (1) comprising a first beam (11) and a second beam (12) and a support panel (13), the support panel (13) is arranged on the upper ends of the first beam (11) and the second beam (12), the first beam (11), the second beam (12) (12) Arranged along the length direction of the support panel (13), the first beam (11) is arranged at the first end of the support panel (13), and the second beam (12) is arranged at the first end of the support panel (13) The second end of the support panel (13), the first end and the second end are arranged opposite to each other, the upper surface of the support panel (13) is provided with a plurality of module mounting parts (6), each of the The module installation parts (6) are all provided with first installation holes (14), the first installation holes (14) are suitable for connecting with the battery module (20) in the battery pack, and a plurality of the module installation parts ( 6) Two rows are formed, one row of the module mounting portion (6) is arranged on the upper surface of the first end of the support panel (13), and the other row of the module mounting portion (6) is arranged on the The upper surface of the second end of the support panel (13), the adjacent module installation parts (6) in each row of the module installation parts (6) are spaced apart, and the adjacent module installation parts ( 6) A second installation hole (15) is provided between, and the first installation hole (14) is adapted to be connected with the support beam (30) in the battery pack. 7. The double-layer module mounting bracket (10) for a battery pack according to claim 6, wherein the second mounting hole (15) is connected to the first beam (11) and the second beam (12) are arranged opposite to each other and pass through the support panel (13), the first beam (11), and the second beam (12) at the same time, and a bushing ( 7). 8 . The double-layer module mounting bracket ( 10 ) for a battery pack according to claim 7 , wherein the first beam ( 11 ) and the second beam ( 12 ) are both provided with weight-reducing holes ( 8 . 16), the weight reduction holes (16) are arranged correspondingly to the module mounting portion (6). 9 . The double-layer module mounting bracket ( 10 ) for a battery pack according to claim 8 , wherein the first beam ( 11 ) and the second beam ( 12 ) are both provided with a first avoidance groove. 10 . (2), the first escape groove (2) is arranged below the weight reduction hole (16), the module mounting part (6), the weight reduction hole (16), the first avoidance The slot (2) is correspondingly set; A positioning groove (8) is arranged on the upper end of the module mounting portion (6), and the first mounting hole (14) is arranged in the positioning groove (8). 10. A battery pack, characterized by comprising the double-layer module mounting bracket (10) of the battery pack according to any one of claims 1-9.