Supporting assembly and battery pack

Abstract

The supporting assembly comprises a first supporting plate, a second supporting plate and a plurality of supporting pieces, the first supporting plate is provided with a first side face and a second side face which are oppositely arranged, the first side face of the first supporting plate is arranged to be used for installing a battery module, and the second supporting plate and the second side face of the first supporting plate are oppositely arranged in a spaced mode; a pressure relief space is formed between the first supporting plate and the second supporting plate; the multiple supporting pieces are distributed in the pressure relief space at intervals, one ends of the supporting pieces are connected with the first supporting plate, and the other ends of the supporting pieces are connected with the second supporting plate. The supporting piece supports the first supporting plate in multiple positions, the probability that the pressure relief space is affected due to deformation of the first supporting plate is reduced, the problems that a supporting plate in an existing double-layer battery module is prone to deformation and poor in supporting effect are solved, and the supporting piece has the advantages of being simple in structure and good in supporting effect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery packs, and particularly relates to a support assembly and a battery pack. BACKGROUND

[0002] In the field of new energy vehicles, the capacity of a battery pack is limited, which affects the cruising range of the vehicle. Due to the limitation of the vehicle body design, a double-layer battery module arrangement design can be performed. The double-layer battery module structure includes a lower layer battery module, an upper layer battery module, a lower layer support plate and an upper layer support plate. The upper layer support plate is located between the upper layer battery module and the lower layer battery module, and the upper layer support plate supports the upper layer battery module. The lower layer support plate is located below the lower layer battery module, and the lower layer support plate supports the lower layer battery module. The weight of the battery module is relatively heavy, and the upper layer support plate and the lower layer support plate are prone to deformation, and the support effect is poor. The pressure relief space in the upper layer support plate and the lower layer support plate is reduced due to the deformation of the support plate, and the pressure relief effect is affected. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the application provide a support assembly and a battery pack to solve the problem that the support plate in the existing double-layer battery module is prone to deformation and has poor support effect.

[0004] In a first aspect, the embodiments of the application provide a support assembly, comprising:

[0005] A first support plate has a first side and a second side arranged opposite along the thickness direction, and the first side of the first support plate is arranged to mount a battery module;

[0006] A second support plate is arranged opposite and spaced apart from the second side of the first support plate, and a pressure relief space is formed between the first support plate and the second support plate;

[0007] A plurality of support members are distributed in the pressure relief space, one end of the support member is connected to the first support plate, and the other end is connected to the second support plate.

[0008] Optionally, the support member comprises a first support part and a second support part, the first support part is arranged on the first support plate, the first support part is arranged protruding to one side of the second support plate, the second support part is arranged on the second support plate, the second support part is arranged protruding to one side of the first support plate, and the first support part and the second support part are in butt joint.

[0009] Optionally, an end portion of the first support part and the second support part in butt joint is provided with a groove, and an end portion of the second support part is located in the groove;

[0010] Or, an end portion of the second support part and the first support part in butt joint is provided with a groove, and an end portion of the first support part is located in the groove.

[0011] Optionally, a support beam is arranged at a position close to the edge of the first support plate and the second support plate, the support beam is located between the first support plate and the second support plate, one side of the support beam is connected with the first support plate, and the other side of the support beam is connected with the second support plate, and the support beam is arranged to be fixedly connected with the box body.

[0012] Optionally, the height of the support beam is the same as the height of the support member in the direction from the second support plate to the first support plate.

[0013] Optionally, two support beams are arranged, the first support plate has a first side and a second side arranged along the length direction or the width direction, one of the support beams is arranged at the first side, and the other support beam is arranged at the second side, one of the support beams is provided with a pressure relief channel, and the pressure relief channel is in communication with the pressure relief space.

[0014] Optionally, a plurality of support members are arranged at intervals along the width direction of the first support plate and / or the length direction of the first support plate.

[0015] Optionally, the intervals of any adjacent support members are the same.

[0016] Optionally, the first support plate is a plastic support plate.

[0017] Optionally, the second support plate is a steel structure support plate.

[0018] In a second aspect, the embodiments of the present application further provide a battery pack comprising the support assembly.

[0019] Optionally, the battery pack further comprises:

[0020] a box body, the support assembly is connected with the box body, and the support assembly divides the internal space of the box body into an upper space and a lower space.

[0021] an upper battery module arranged in the upper space and mounted on the support assembly.

[0022] a lower battery module arranged in the lower space.

[0023] Optionally, the support assembly is arranged at the bottom of the box body, and the support assembly is arranged to mount the lower battery module.

[0024] Optionally, the upper space and the lower space of the box body are filled with sealant.

[0025] Optionally, the sealant is arranged in the gap between the battery cells of the upper battery module and the lower battery module.

[0026] The support assembly and the battery pack provided by the embodiments of the present application comprise a first support plate, a second support plate and a plurality of support pieces. The first support plate and the second support plate form a pressure relief space therebetween. The plurality of support pieces are distributed in the pressure relief space at intervals. One end of each support piece is connected to the first support plate, and the other end is connected to the second support plate. The support pieces support the first support plate at multiple positions, thereby reducing the probability of the deformation of the first support plate affecting the pressure relief space. The support assembly provided by the embodiments of the present application overcomes the problems of the prior art, such as the deformation of the support plate in the double-layer battery module and the poor support effect, and has the advantages of simple structure and good support effect. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0028] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0029] Figure 1 The support assembly provided by the embodiments of the present application is shown in the perspective view.

[0030] Figure 2 The support assembly provided by the embodiments of the present application is shown in the exploded view.

[0031] Figure 3 The support assembly provided by the embodiments of the present application is shown in the cross-sectional view.

[0032] Figure 4 The support assembly provided by the embodiments of the present application is shown in the perspective view. Figure 3 The local enlarged view of A in the above figure.

[0033] Figure 5 The battery pack provided by the embodiments of the present application is shown in the perspective view.

[0034] Figure 6 The battery pack provided by the embodiments of the present application is shown in the perspective cross-sectional view.

[0035] The reference numerals in the figures are as follows:

[0036] 10, battery pack; 100, support assembly; 110, first support plate; 120, second support plate; 130, support piece; 131, first support part; 132, second support part; 133, groove; 140, pressure relief space; 150, support beam; 160, pressure relief channel; 200, box body; 210, upper space; 220, lower space; 230, partition plate; 240, battery compartment; 250, electrical compartment; 251, pressure relief cavity; 260, explosion-proof valve; 300, upper battery module; 400, lower battery module. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present embodiment provides a support assembly 100 applied to a battery pack with double-layer battery modules. The support assembly 100 comprises a first support plate 110, a second support plate 120 and a plurality of support pieces 130.

[0039] In the present embodiment, referring to Figure 2 and Figure 3The first support plate 110 is a rectangular plate, and the first support plate 110 is provided with a pressure relief hole position corresponding to each battery in the battery module. The battery can be a cylindrical battery. The first support plate 110 has a first side and a second side arranged opposite in the thickness direction, and the first side of the first support plate 110 is arranged to mount the battery module. The battery cells in the battery module are arranged in position with the pressure relief holes on the first support plate 110. The second support plate 120 is a rectangular plate, and the second support plate 120 is arranged opposite the second side of the first support plate 110. The first support plate 110 and the second support plate 120 form a pressure relief space 140. The pressure relief holes on the first support plate 110 communicate with the pressure relief space 140. Exemplarily, a plurality of support members 130 are arranged, and the plurality of support members 130 are distributed in the pressure relief space 140. One end of the support member 130 is connected to the first support plate 110, and the other end is connected to the second support plate 120. In the thickness direction of the support member 130, the projection of the support member 130 in the plane of the first support plate 110 is arranged away from the pressure relief holes on the first support plate 110. The arrangement of the support member 130 does not affect the communication of the pressure relief holes and the pressure relief space, and ensures the pressure relief effect. In addition, the projection of the support member 130 in the plane of the first support plate 110 is arranged dispersedly, which supports the first support plate 110 from different positions, so that the support force received by each part of the first support plate 110 is uniform, and the first support plate 110 is not easily deformed as a whole.

[0040] In the embodiments of the present application, a plurality of support members 130 are arranged in the pressure relief space 140 formed by the first support plate 110 and the second support plate 120. The support member 130 avoids the pressure relief holes on the first support plate 110, ensuring the pressure relief effect. The support member 130 supports the first support plate 110, reduces the probability of deformation of the first support plate 110 due to bearing, and improves the structural strength of the first support plate 110. The probability of compression of the pressure relief space 140 due to deformation of the first support plate 110 is reduced, and the pressure relief effect is ensured.

[0041] In some embodiments, referring to Figure 3 and Figure 4The support 130 comprises a first support portion 131 and a second support portion 132. The first support portion 131 is arranged on the first support plate 110 and protrudes towards one side of the second support plate 120. For example, the first support portion 131 is welded on the side of the first support plate 110 close to the second support plate 120. Alternatively, the first support portion 131 is integrally formed with the first support plate 110. The first support plate 110 is formed by injection molding. Part of the plate body of the first support plate 110 protrudes towards the side of the second support plate 120 to form the first support portion 131. The second support portion 132 is arranged on the second support plate 120 and protrudes towards the side of the first support plate 110. The first support portion 131 and the second support portion 132 are in abutment. For example, the second support portion 132 is welded on the side of the second support plate 120 close to the first support plate 110. Alternatively, the second support portion 132 is integrally formed with the second support plate 120. The second support plate 120 is subjected to a stamping force to protrude towards the side of the first support plate 110 to form the second support portion 132.

[0042] In the embodiments of the present application, the support 130 is arranged in a split structure of the first support portion 131 and the second support portion 132. If the support 130 is formed by stamping or injection molding, the first support portion 131 is machined on the first support plate 110 and the second support portion 132 is machined on the second support plate 120. The height of the first support portion 131 and the second support portion 132 is moderate, which is conducive to the machining and forming. In addition, the first support plate 110 is formed in a structure of recessing on one side and protruding on the other side to form the first support portion 131, which increases the structural strength of the first support plate 110. The second support plate 120 is formed in a structure of recessing on one side and protruding on the other side to form the second support portion 132, which increases the structural strength of the second support plate 120.

[0043] In other embodiments, referring to Figure 6 , the support 130 is in an integral structure. The support 130 can be in a columnar, conical or irregular boss structure. The support 130 is arranged on the first support plate 110 and protrudes towards the side of the second support plate 120. The end of the support 130 away from the first support plate 110 is in abutment with the second support plate 120. Alternatively, the support 130 is arranged on the second support plate 120 and protrudes towards the side of the first support plate 110. The end of the support 130 away from the second support plate 120 is in abutment with the first support plate 110.

[0044] In some embodiments, referring to Figure 3 and Figure 4, the end of the first supporting part 131 and the second supporting part 132 is provided with a groove 133, and the end of the second supporting part 132 is located in the groove 133. The first supporting part 131 and the second supporting part 132 are in a cylindrical shape or a frustum shape. The end of the first supporting part 131 away from the first supporting plate 110 is provided with a groove 133, and the groove 133 is recessed to the side of the first supporting plate 110. The outer diameter of the end of the second supporting part 132 away from the second supporting plate 120 is matched with the inner diameter of the groove 133. The end of the second supporting part 132 is located in the groove 133 of the first supporting part 131. The probability of mispositioning of the second supporting part 132 and the first supporting part 131 is reduced. During the assembly of the first supporting plate 110 and the second supporting plate 120, the first supporting part 131 and the second supporting part 132 are conveniently positioned, and rapid and accurate positioning is achieved.

[0045] In some embodiments, referring to 3 and Figure 4 , the end of the second supporting part 132 and the first supporting part 131 is provided with a groove 133, and the end of the first supporting part 131 is located in the groove 133. The first supporting part 131 and the second supporting part 132 are in a cylindrical shape or a frustum shape. The end of the second supporting part 132 away from the second supporting plate 120 is provided with a groove 133, and the groove 133 is recessed to the side of the second supporting plate 120. The end of the first supporting part 131 away from the first supporting plate 110 is matched with the groove 133. The end of the first supporting part 131 is located in the groove 133 of the second supporting plate 120. The probability of mispositioning of the second supporting part 132 and the first supporting part 131 is reduced. During the assembly of the first supporting plate 110 and the second supporting plate 120, the first supporting part 131 and the second supporting part 132 are conveniently positioned, and rapid and accurate positioning is achieved.

[0046] In some embodiments, referring to Figure 1 and Figure 2 , a supporting beam 150 is further included. The supporting beam 150 is in a long strip shape. The supporting beam 150 is made of a material. The supporting beam 150 is arranged at a position close to the edge of the first supporting plate 110 and the second supporting plate 120. The supporting beam 150 is located between the first supporting plate 110 and the second supporting plate 120, and one side of the supporting beam 150 is connected to the first supporting plate 110, and the other side is connected to the second supporting plate 120. The supporting beam 150 is arranged to be fixedly connected to the box body 200. The supporting beam 150 can be arranged in multiple, supporting the first supporting plate 110 from the periphery of the first supporting plate 110 and the second supporting plate 120, improving the stability of the first supporting plate 110, and facilitating the assembly operation of the first supporting plate 110 and the second supporting plate 120.

[0047] In some embodiments, referring to Figure 3From the direction in which the second support plate 120 points to the first support plate 110, the height of the support beam 150 is the same as the height of the support piece 130. The height of the support beam 150 refers to the distance between the side of the support beam 150 that is in contact with the first support plate 110 and the side of the support beam 150 that is in contact with the second support plate 120. The height of the support piece 130 refers to the distance between the end of the support piece 130 that is connected to the first support plate 110 and the end of the support piece 130 that is connected to the second support plate 120.

[0048] In the embodiments of the present application, the height of the support beam 150 is the same as the height of the support piece 130, and the support beam 150 and the support piece 130 jointly support the first support plate 110, thereby achieving good support effect.

[0049] In other embodiments, the height of the support beam 150 can be slightly greater than the height of the support piece 130. When the first support plate 110 deforms due to bearing, it abuts against the support piece 130, and as long as the minimum space of the pressure relief space 140 can meet the pressure relief demand, it is acceptable.

[0050] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , two support beams 150 are provided, which are a first support beam and a second support beam. The first support beam and the second support beam are both long strips. The first support beam and the second support beam are respectively located on opposite sides of the first support plate 110. The first support plate 110 has a first side edge and a second side edge that are oppositely arranged along the length direction or the width direction, and one of the support beams is located on the first side edge and the other support beam is located on the second side edge. For example, along the length direction of the battery pack, the first support beam and the second support beam are arranged at intervals. One of the two support beams 150 is provided with a pressure relief channel 160, and the pressure relief channel 160 communicates with the pressure relief space 140. For example, the first support beam is provided with the pressure relief channel 160, and the first support beam is a hollow structure. The first support beam is provided with a through hole on the side wall, and the through hole communicates the internal space of the first support beam with the pressure relief space 140. For example, along the width direction of the battery pack, the first support beam and the second support beam are arranged at intervals. The first support beam and the second support beam are arranged to avoid the side of the battery pack on which the pressure relief valve of the box body 200 is located. The pressure relief space directly communicates with the pressure relief cavity in the box body 200 on the side on which the pressure relief valve is located.

[0051] In other embodiments, four support beams 150 can be provided, and the four support beams 150 are arranged around the first support plate 110. The four support beams 150 jointly support the first support plate 110. The four support beams 150 can be welded into a frame-shaped structure.

[0052] In some embodiments, referring to Figure 2 , Figure 3 and Figure 4The plurality of support members 130 are arranged at intervals along the width direction of the first support plate 110 and / or the length direction of the first support plate 110.

[0053] For example, the plurality of support members 130 are arranged at intervals along the width direction of the first support plate 110. The support members 130 are arranged in the region near the middle of the first support plate 110.

[0054] For example, the plurality of support members 130 are arranged at intervals along the length direction of the first support plate 110. The support members 130 are arranged in the region near the middle of the first support plate 110.

[0055] For example, the plurality of support members 130 are arranged in a matrix along the length direction and the width direction of the first support plate 110. Along the length direction of the first support plate 110, a plurality of columns are formed, and a plurality of support members 130 are arranged in each column.

[0056] In some embodiments, referring to Figure 3 The intervals of any adjacent support members 130 are the same. For example, the intervals of any adjacent support members 130 are the same along the width direction of the first support plate 110. Alternatively, the intervals of any adjacent support members 130 are the same along the length direction of the first support plate 110.

[0057] In other embodiments, the number of support members 130 in different regions of the first support plate 110 is different. For example, the number of support members 130 in the region near the middle of the first support plate 110 is large, and the support members 130 are arranged in a concentrated manner. In the region of the first support plate 110 near the support beam 150, the number of support members 130 is small. That is, the number of support members 130 is increased in the region of the first support plate 110 that is prone to deformation, and the number of support members 130 is appropriately reduced in other regions.

[0058] In some embodiments, the first support plate 110 is a plastic support plate. The first support plate 110 is in direct contact with the battery assembly, and the first support plate 110 is made of plastic material, has good insulation performance, and is convenient to process.

[0059] In some embodiments, the second support plate 120 is a steel structure support plate. The second support plate 120 bears the weight of the first support plate 110, the support beam 150, and the battery assembly, and has a higher requirement for structural strength. The steel structure support plate can meet the requirement for structural strength.

[0060] Referring to Figure 5 and Figure 6 The embodiments of the present application also provide a battery pack 10 comprising the support assembly 100. The battery pack 10 has the same technical effects as the above-described support assembly 100, and will not be described here again.

[0061] In some embodiments, referring to Figure 5and Figure 6 The battery pack 10 further comprises a box 200, an upper layer battery module 300 and a lower layer battery module. The support assembly 100 is arranged in the box 200, and the support assembly 100 is connected with the side wall of the box 200. The support assembly 100 can be directly connected with the box 200 or indirectly connected with the box 200. In the height direction of the box 200, the support assembly 100 is arranged in the region close to the middle of the box 200. The support assembly 100 divides the internal space of the box 200 into an upper layer space 210 and a lower layer space 220. The upper layer battery module 300 is located in the upper layer space 210, and the upper layer battery module 300 is mounted on the support assembly 100. Specifically, the upper layer battery module 300 is mounted on the first support plate 110. The lower layer battery module 400 is located in the lower layer space 220, and the top of the lower layer battery module 400 is spaced apart from the second support plate 120 by a certain distance.

[0062] In the embodiment of the present application, the support assembly 100 supports the upper layer battery module 300, can bear the weight of the upper layer battery module 300, and reduces the probability of deformation of the first support plate 110 caused by bearing the upper layer battery module 300. The second support plate 120 of the support assembly 100 is fixedly connected with the inner wall of the box 200, and the second support plate 120 jointly supports the first support plate 110 and the upper layer battery module 300. The support assembly 100 occupies a small space in the box 200, saves space, and is conducive to realizing the miniaturization of the battery pack 10.

[0063] In some embodiments, referring to Figure 6 A partition plate 230 is arranged in the box 200, and the partition plate 230 divides the internal space of the box 200 into a battery compartment 240 and an electrical compartment 250. The support assembly 100 is arranged in the battery compartment 240. One side edge of the second support plate 120 is fixedly connected with the box 200, and the other side edge is fixedly connected with the partition plate 230. Electrical equipment is installed in the electrical compartment 250. The battery and the electrical equipment are separated, which facilitates the maintenance of the electrical part.

[0064] For example, referring to Figure 6 An explosion-proof valve 260 is arranged on the side wall of the box 200 away from the partition plate 230, and a pressure relief cavity 251 is arranged inside the side wall, and the pressure relief cavity 251 is in communication with the pressure relief space 140. The gas generated by the upper layer battery module 300 enters the pressure relief cavity 251 through the pressure relief space 140. A pressure relief hole is arranged on the first support plate 110, and the pressure relief hole is arranged in position with the battery of the lower layer battery module 400. The gas generated by the lower layer battery module 400 can also enter the pressure relief cavity 251 through the pressure relief space 140.

[0065] In some embodiments, two support beams 150 are provided, which are a first support beam and a second support beam. The first support beam is in the shape of a long strip, and the first support beam is welded to a side wall of the box body 200 away from the partition plate 230. The first support beam is provided with a pressure relief channel 160, and the pressure relief channel 160 is in communication with the pressure relief space 140 and the pressure relief cavity 251. The second support beam is in the shape of an "L" letter, and the second support beam is fixedly connected to a side surface of the battery compartment 240.

[0066] In other embodiments, referring to Figure 6 , the first support beam can be integrally formed with the box body 200.

[0067] In some embodiments, referring to Figure 6 , the bottom of the box body 200 is provided with a support assembly 100, and the support assembly 100 is installed with the lower layer battery module 400. The support assembly 100 is part of the bottom plate structure of the box body 200. The support assembly 100 is located at the bottom of the battery compartment 240. The pressure relief space 140 in the support assembly 100 is used for pressure relief of the lower layer battery module 400. The upper layer battery module 300 and the lower layer battery module 400 are respectively supported by the support assembly 100 located in the middle and the support assembly 100 located at the bottom, and the support effect is good. The support assembly 100 located in the middle and the support assembly 100 located at the bottom both have the pressure relief space 140, which is beneficial to safe pressure relief of the battery pack 10 and ensures the safety and reliability of the battery pack 10.

[0068] In some embodiments, the upper layer space 210 and the lower layer space 220 of the box body 200 are filled with sealant. The sealant is processed by a foaming glue filling process. After the foaming glue is filled in the lower layer space 220, the support assembly 100 above the lower layer battery module 400 is installed, and then the foaming glue is filled in the upper layer space 210. The gaps between the battery monomers in the upper layer battery module 300 and the lower layer battery module 400 are filled with foaming glue, which improves the sealing performance of the battery pack.

[0069] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0070] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0071] The support assembly and the battery pack provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A support assembly (100) characterized by, The application relates to a battery module support structure, comprising: a first support plate (110) having a first side and a second side arranged oppositely along the thickness direction, wherein the first side of the first support plate (110) is arranged to mount a battery module; a second support plate (120) arranged oppositely and spaced apart from the second side of the first support plate (110), wherein a pressure relief space (140) is formed between the first support plate (110) and the second support plate (120); a plurality of support members (130) distributed in the pressure relief space (140), wherein one end of the support member (130) is connected to the first support plate (110) and the other end is connected to the second support plate (120).

2. The support assembly (100) according to claim 1, characterized in that The support member (130) comprises a first support part (131) arranged on the first support plate (110) and a second support part (132) arranged on the second support plate (120), wherein the first support part (131) is arranged to protrude to one side of the second support plate (120), the second support part (132) is arranged to protrude to one side of the first support plate (110), and the first support part (131) is connected to the second support part (132).

3. The support assembly (100) according to claim 2, characterized in that The end of the first support part (131) and the second support part (132) is provided with a groove (133), and the end of the second support part (132) is located in the groove (133). Or, the end of the second support part (132) and the first support part (131) is provided with a groove (133), and the end of the first support part (131) is located in the groove (133).

4. The support assembly (100) according to claim 1, characterized in that The support beam (150) is arranged at the edge of the first support plate (110) and the second support plate (120), the support beam (150) is located between the first support plate (110) and the second support plate (120), one side of the support beam (150) is connected to the first support plate (110), and the other side is connected to the second support plate (120), and the support beam (150) is arranged to be fixedly connected to the box body (200).

5. The support assembly (100) according to claim 4, characterized in that The height of the support beam (150) is the same as the height of the support member (130) in the direction from the second support plate (120) to the first support plate (110).

6. The support assembly (100) according to claim 4, characterized in that Two support beams (150) are arranged, the first support plate (110) has a first side and a second side arranged along the length direction or the width direction, one of the support beams is arranged on the first side, and the other support beam is arranged on the second side, one of the support beams (150) is provided with a pressure relief channel (160) therein, and the pressure relief channel (160) is connected to the pressure relief space (140).

7. Support assembly (100) according to any one of claims 1 to 6, characterized in that A plurality of support members (130) are arranged along the width direction of the first support plate (110) and / or the length direction of the first support plate (110).

8. The support assembly (100) according to claim 7, characterized in that The distance between any adjacent support members (130) is the same.

9. The support assembly (100) according to any one of claims 1 to 6, characterized in that The first support plate (110) is a plastic support plate. And / or, the second support plate (120) is a steel structure support plate.

10. A battery pack (10) characterized by, Comprise: The support assembly (100) according to any one of claims 1 to 9.

11. The battery pack (10) of claim 10, characterized in that Further comprise: The support assembly (100) is connected with the box (200), and the support assembly (100) divides the internal space of the box (200) into an upper space (210) and a lower space (220); The upper layer battery module (300) is located in the upper space (210) and is installed on the support assembly (100); The lower layer battery module (400) is located in the lower space (220).

12. The battery pack (10) according to claim 11, characterized in that The bottom of the box (200) is provided with the support assembly (100), and the support assembly (100) installs the lower layer battery module (400).

13. The battery pack (10) of claim 11, characterized in that, The upper space (210) and the lower space (220) of the box (200) are filled with sealant.

14. The battery pack (10) according to claim 13, characterized in that The sealant fills the gap between the battery monomers of the upper layer battery module (300) and the lower layer battery module (400).

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