CN111063843B

CN111063843B - Battery box of vehicle and vehicle

Info

Publication number: CN111063843B
Application number: CN201911360193.0A
Authority: CN
Inventors: 聂帅; 张春林; 张宇; 张亮
Original assignee: Beijing Hainachuan Automotive Parts Co Ltd
Current assignee: Beijing Hainachuan Automotive Parts Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2023-01-24
Anticipated expiration: 2039-12-25
Also published as: CN111063843A

Abstract

The invention discloses a battery box of a vehicle and the vehicle. The bottom plate has a second overlapping edge, and the second overlapping edge and the first overlapping edge are arranged in a stacked mode. The first overlapping edge and the second overlapping edge are connected through a threaded piece. According to the battery box of the vehicle of the present invention, by providing the first overlapping edge and the second overlapping edge and connecting the first overlapping edge and the second overlapping edge by the screw, it is possible to enhance the reliability of the connection of the side member and the floor panel on the one hand; on the other hand, the threaded part connection has the characteristics of quick installation and disassembly, so that the requirement for large-batch automatic production can be met, and the threaded part connection is convenient to replace during maintenance.

Description

Battery box of vehicle and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a battery box of a vehicle and the vehicle.

Background

With the development of electric automobile technology, more and more users select electric automobiles to go out, and in order to meet the requirement of large-scale automatic production, a battery box bottom plate needs to be suitable for an automatic rapid assembly and connection process. In the related technology, the bottom plate is connected with the edge beam through a welding process, and the scheme has the disadvantages of complex structure, lower working efficiency, low automation degree and inconvenience in maintenance and replacement. Moreover, the battery box also needs to have good bottom protection performance so as to deal with the impact of broken stones or bulges in the driving process.

Disclosure of Invention

The invention provides a battery box of a vehicle, which has the advantage of quick assembly.

The invention provides a vehicle having a battery box of the vehicle as described above.

According to the embodiment of the invention, the battery box of the vehicle comprises the edge beam, the bottom plate and the screw piece, wherein the edge beam is provided with the first lap edge. The bottom plate has a second overlapping edge, and the second overlapping edge and the first overlapping edge are arranged in a stacked mode. The first overlapping edge and the second overlapping edge are connected through the threaded piece.

According to the battery box of the vehicle of the embodiment of the invention, the first overlap edge and the second overlap edge are arranged and are connected by the screw, so that the reliability of the connection between the side beam and the bottom plate can be enhanced; on the other hand, the threaded part connection has the characteristics of quick installation and disassembly, so that the requirement for large-batch automatic production can be met, and the threaded part connection is convenient to replace during maintenance.

In some embodiments, the first overlapping edge has a first hollowed-out portion, and a portion of the screw is inserted into the first hollowed-out portion.

In some embodiments, the first hollowed-out portion has a foamed layer therein.

In some embodiments, a sealing layer is provided between the second overlapping edge and the first overlapping edge.

In some embodiments, the edge beam includes a first main body portion, the first overlapping edge is connected with the first main body portion, and the first overlapping edge is located at an edge of the first main body portion.

In some embodiments, the first body portion has a second hollowed-out portion therein.

In some embodiments, the bottom panel includes a second main body portion connected to the second overlapping edge, and the second overlapping edge is located at an edge of the second main body portion.

In some embodiments, the second body portion has a third hollowed-out portion therein.

In some embodiments, at least one of the floor and the edge beam is an aluminum alloy piece.

In some embodiments, a surface of the first lap edge facing the second lap edge has a first step face, and a surface of the second lap edge facing the first lap edge has a second step face matching the first step face.

The vehicle according to the embodiment of the invention includes the battery box of the vehicle as described above.

According to the vehicle of the embodiment of the invention, by providing the first overlap edge and the second overlap edge and connecting the first overlap edge and the second overlap edge by using the screws, on one hand, the reliability of the connection of the side beam and the floor panel can be enhanced; on the other hand, the threaded part connection has the characteristics of quick installation and disassembly, so that the requirement for large-batch automatic production can be met, and the threaded part connection is convenient to replace during maintenance.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a sectional view of a battery box of a vehicle according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a floor panel of a battery box of a vehicle according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along A-A of FIG. 2;

fig. 4 is a sectional view taken along the direction B-B in fig. 2.

Reference numerals are as follows:

the battery box (100) is provided with a battery case,

the edge beams 110 are arranged in a row and are,

a first overlapping edge 111, a first hollow portion 1111, a first step surface 1112,

the first main body 112, the second hollow portion 1121,

the base plate 120 is provided with a plurality of,

the second overlapping edge 121, the second step surface 1211,

the second body portion 122, the third hollow portion 1221,

the water inlet pipe 123 is connected to the water inlet pipe,

a first plate 124, a first water flow channel 1241, a first side 1242, a second side 1243, a first upper plate 1244, a first lower plate 1245, a first mounting cavity 1246, a first rib 1247,

a water outlet pipe 125 is connected to the water tank,

second plate 126, second water channel 1261, third side 1262, fourth side 1263, second upper plate 1264, second lower plate 1265, second mounting cavity 1266, second rib 1267,

the screw member (130) is provided with a screw,

and a sealing layer 140.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

A battery box 100 of a vehicle and a vehicle according to an embodiment of the invention are described below with reference to fig. 1 to 4. The battery case 100 of the vehicle may be a case structure that houses the battery module, the case having side walls and a bottom plate 120.

As shown in fig. 1 to 2, a battery case 100 for a vehicle according to an embodiment of the present invention includes: an edge beam 110, a base plate 120, and a threaded member 130.

Specifically, the edge beams 110 may be provided at corners of the battery case 100 to enhance the structural strength of the battery case 100. The side sill 110 has a first overlapping edge 111, the bottom plate 120 has a second overlapping edge 121, and the second overlapping edge 121 and the first overlapping edge 111 are stacked, whereby the second overlapping edge 121 and the first overlapping edge 111 can support each other. In order that the second overlapping edge 121 and the first overlapping edge 111 may be more firmly and stably connected together, the first overlapping edge 111 and the second overlapping edge 121 are connected by a screw 130.

With the development of electric automobile technology, more and more users select electric automobiles to go out, and in order to meet the requirement of large-scale automatic production, a battery box bottom plate needs to be suitable for an automatic rapid assembly and connection process. In the related technology, the bottom plate is connected with the edge beam through a welding process, and the scheme has the disadvantages of complex structure, lower working efficiency, low automation degree and inconvenience in maintenance and replacement.

In the battery box 100 of the vehicle according to the embodiment of the present invention, by providing the first overlapping side 111 and the second overlapping side 121 and connecting the first overlapping side 111 and the second overlapping side 121 by the screws 130, it is possible to enhance the reliability of the connection of the side frame 110 and the base plate 120; on the other hand, the screw 130 connection has the characteristic of rapid installation and disassembly, thereby meeting the requirement of mass automatic production and being convenient for replacement during maintenance.

In some embodiments of the present invention, as shown in fig. 1, the first overlapping edge 111 has a first hollow 1111, and a portion of the screw 130 is inserted into the first hollow 1111. The first hollow-out portion 1111 of the first overlapping edge can reduce the weight of the edge beam 110, and further reduce the weight of the battery box 100, so that the battery box 100 has the characteristic of light weight. Referring to fig. 1, in some embodiments of the present invention, the first hollow portion 1111 has a foaming layer therein. The foamed layer may reinforce the structure of the first overlapping edge 111, thereby reinforcing the strength of the edge beam 110, and may also reinforce the connection strength of the screw 130.

Referring to fig. 1, according to some embodiments of the present invention, a sealing layer 140 is provided between the second strap 121 and the first strap 111. For example, the sealing layer 140 may be compressible foam, and the sealing layer 140 may function to seal the edge beam 110 and the bottom plate 120 between the second overlapping edge 121 and the first overlapping edge 111, so as to reduce damage to the battery module caused by dust, corrosive gas, and the like entering the battery box 100.

As shown in fig. 1, in some embodiments of the present invention, the edge beam 110 may include a first main body portion 112, the first overlapping edge 111 is connected to the first main body portion 112, and the first overlapping edge 111 is located at an edge of the first main body portion 112. Thereby, the first body part 112 may be coupled to the base plate 120 by the first overlapping edge 111, so that the first body part 112 and the base plate 120 may limit an accommodation space to place the battery module.

With reference to fig. 1, in some embodiments of the present invention, the first main body 112 has a second hollow portion 1121 therein. The second hollow portion 1121 may reduce the weight of the first body portion 112, and thus the weight of the battery box 100 may be reduced. The second hollow portion 1121 may also have a foaming layer therein, and the foaming layer may reinforce the structure of the first main body portion 112, thereby reinforcing the strength of the battery box 100.

According to some embodiments of the present invention, as shown in fig. 1-2, the bottom panel 120 includes a second main body portion 122, the second main body portion 122 is connected with a second overlapping edge 121, and the second overlapping edge 121 is located at an edge of the second main body portion 122. Thus, the second body portion 122 may be connected to the side frame 110 by the second overlapping edge 121, so that the side frame 110 and the base plate 120 may construct a receiving space to receive the battery module.

Referring to fig. 1, in some embodiments of the present invention, the second body portion 122 has a third hollow 1221 therein. The third hollow portion 1221 can reduce the weight of the second main body portion 122, and thus can reduce the weight of the battery box 100. The third hollow portion 1221 may also have a foaming layer therein, and the foaming layer may reinforce the structure of the second main body portion 122, so as to strengthen the strength of the bottom plate 120, so that the floor of the battery box 100 may better withstand the impact of broken stones or protrusions during the driving process, which is beneficial to the extension of the service life of the battery box 100 and is also beneficial to the driving safety.

In still other embodiments of the present invention, at least one of the floor 120 and the edge beam 110 is an aluminum alloy member. That is, the bottom plate 120 may be an aluminum alloy member, and the edge beam 110 may also be an aluminum alloy member; of course, both the base plate 120 and the edge beam 110 may be aluminum alloy pieces. The aluminum alloy member has the characteristics of light weight and easy acquisition, at least one of the bottom plate 120 and the edge beam 110 is the aluminum alloy member, so that the weight of the battery box 100 can be reduced, the battery box 100 has the characteristic of light weight, and the manufacturing cost of the battery box 100 can be reduced due to the lower cost of the aluminum alloy material.

According to some embodiments of the present invention, as shown in fig. 1, a surface of the first lap edge 111 facing the second lap edge 121 has a first step surface 1112, and a surface of the second lap edge 121 facing the first lap edge 111 has a second step surface 1211 matching the first step surface 1112. It can be understood that the second step surface 1211 and the first step surface 1112 can be supported by each other, and the cooperation between the first step surface 1112 and the second step surface 1211 can ensure that the edge beam 110 and the bottom plate 120 are assembled more reliably, so that the structure of the battery box 100 is more stable, and the stable structure of the battery box 100 is beneficial to providing a reliable installation environment for the battery module.

In some embodiments of the present invention, as shown in fig. 2, the battery box 100 of the vehicle includes a water inlet pipe 123, a first plate 124, a water outlet pipe 125, and a second plate 126. The first panel 124 and the second panel 126 each have a second overlapping edge 121 and a second main body portion 122.

Specifically, referring to fig. 2-4, the first plate 124 has a first water flow passage 1241 therein, and the water inlet pipe 123 is communicated with the first water flow passage 1241. The first plate 124 may be used as the bottom plate 120 of the battery box 100 to provide support for the battery module. The second plate 126 has a second water flow channel 1261 therein, and the water outlet pipe 125 is communicated with the second water flow channel 1261.

As shown in fig. 2, the first plate 124 and the second plate 126 are connected, and the first water flow passage 1241 communicates with the second water flow passage 1261. Thus, the cooling water can be injected from the water inlet pipe 123 into the first water flow channel 1241 of the first plate 124, and then enter the second water flow channel 1261 of the second plate 126 from the first water flow channel 1241, and finally, the cooling water flows out from the water outlet pipe 125. It can be understood that, the battery module can produce a large amount of heat when in operation, and the heat can make the temperature of battery box 100 rise, and through setting up first rivers passageway 1241 and second rivers passageway 1261, the cooling water can carry out the heat exchange with battery box 100, and then can dispel the heat to battery box 100, reduces the temperature of battery box 100 to can dispel the heat around the battery module fast, reduce the temperature of battery module.

As shown in fig. 3, the first plate 124 may include a first upper plate 1244, a first lower plate 1245, and a first rib 1247. First lower plate 1245 is spaced apart from first upper plate 1244, and first lower plate 1245 and first upper plate 1244 define a first mounting cavity 1246. The first rib 1247 is positioned in the first installation cavity 1246, and the first rib 1247 divides the first installation cavity 1246 into the first water flow passage 1241. Therefore, by providing the first rib 1247, not only the formation of the first water flow passage 1241 can be simplified, but also the structural strength of the first plate 124 can be improved by utilizing the supporting function of the first rib 1247.

As shown in fig. 4, the second plate 126 may include a second upper plate 1264, a second lower plate 1265, and a second rib 1267. Second lower plate 1265 is spaced apart from second upper plate 1264, and second lower plate 1265 and second upper plate 1264 define a second mounting cavity 1266. Second rib 1267 is located within second mounting cavity 1266 and second rib 1267 divides second mounting cavity 1266 into second water flow passages 1261. Thus, by providing the second ribs 1267, the formation of the second water flow passages 1261 can be simplified, and the structural strength of the second plate 126 can be improved by the supporting function of the second ribs 1267.

As shown in fig. 2, the first plate 124 and the second plate 126 are welded. From this, first plate body 124 and second plate body 126 can be connected more firmly, and then can avoid first plate body 124 and second plate body 126 to connect the cooling water problem of leaking that becomes flexible to lead to, also can provide reliable support environment for the battery module.

Referring to fig. 2, the first plate 124 has a first side edge 1242 and a second side edge 1243 adjacent to each other, the inlet pipe 123 is disposed on the first side edge 1242, and the second side edge 1243 is connected to the second plate 126. It should be noted that a first side edge 1242 and a second side edge 1243 may be formed at an edge of the first plate body 124, and the water inlet pipe 123 is disposed at the position of the first side edge 1242 and connected to the second plate body 126 by using the second side edge 1243, so that the layout of the first water flow channel 1241 on the first plate body 124 may be optimized, and more first water flow channels 1241 may flow through the first plate body 124, so as to sufficiently dissipate heat of the first plate body 124; the water inlet pipe 123 can be prevented from interfering with the layout of the battery module, so that more accommodating spaces can be provided for the battery module.

Referring to fig. 2, the second plate 126 has a third side 1262 and a fourth side 1263 adjacent to each other, the water outlet tube 125 is disposed on the third side 1262, and the fourth side 1263 is connected to the first plate 124. It should be noted that, a third side 1262 and a fourth side 1263 may be configured at an edge of the second plate 126, and the water outlet tube 125 is disposed at the position of the third side 1262 and connected to the first plate 124 by using the fourth side 1263, so that the layout of the second water flow channel 1261 on the second plate 126 can be optimized, and more second water flow channels 1261 flow through the second plate 126, thereby sufficiently dissipating heat from the second plate 126; and the water outlet pipe 125 can be prevented from interfering with the layout of the battery modules, so that more accommodating space can be provided for the battery modules.

Referring to fig. 2, at least one of the first plate 124 and the second plate 126 is an aluminum alloy plate. That is, the first plate body 124 may be an aluminum alloy plate; the second plate 126 may also be an aluminum alloy plate; of course, both the first plate 124 and the second plate 126 may be aluminum alloy plates. It should be noted that the aluminum alloy sheet can have advantages of light weight and easy availability. Therefore, not only the weight of the first plate 124 or the second plate 126 can be reduced, but also the production cost of the first plate 124 and the second plate 126 can be reduced.

As shown in fig. 2, the first plate 124 is welded to the water inlet pipe 123, and the second plate 126 is welded to the water outlet pipe 125, so that the welding process is simple, the connection strength is high, the risk that the water inlet pipe 123 falls off from the first plate 124 can be reduced, the risk that the water outlet pipe 125 falls off from the second plate 126 can be reduced, and the possibility of the failure of the cooling function of the battery box 100 can be reduced.

In the battery box 100 of the vehicle, the first water flow channel 1241 is arranged on the first plate 124, the second water flow channel 1261 is arranged on the second plate 126, the first water flow channel 1241 is communicated with the second water flow channel 1261, the water inlet pipe 123 is connected with the first water flow channel 1241, and the water outlet pipe 125 is connected with the second water flow channel 1261, so that cooling water can flow in the first plate 124 and the second plate 126, heat exchange can be carried out between the cooling water and the battery box 100, the heat of the battery box 100 can be dissipated, the temperature of the battery box 100 is reduced, heat around a battery module can be quickly dissipated, and the temperature of the battery module is reduced.

The battery case 100 of the vehicle according to the embodiment of the present invention is described in detail below with reference to fig. 1 to 2. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.

As shown in fig. 1 to 2, a battery box 100 for a vehicle includes: the edge beam 110, the bottom plate 120, the screw 130, and the sealing layer 140. Specifically, the edge beams 110 may be provided at corners of the battery case 100 to enhance the structural strength of the battery case 100. The boundary beam 110 has a first overlapping edge 111, the first overlapping edge 111 has a first hollow-out portion 1111, and the first hollow-out portion 1111 can reduce the weight of the boundary beam 110, so as to reduce the weight of the battery box 100, and the battery box 100 has the characteristic of light weight. The first hollow portion 1111 may have a foaming layer therein, and the foaming layer may reinforce the structure of the first overlapping edge 111, thereby reinforcing the strength of the edge beam 110.

The bottom plate 120 has a second overlapping edge 121, and the second overlapping edge 121 and the first overlapping edge 111 are stacked, so that the second overlapping edge 121 and the first overlapping edge 111 can support each other. In order to enable the second overlapping edge 121 and the first overlapping edge 111 to be connected together more firmly and stably, a sealing layer 140 is arranged between the second overlapping edge 121 and the first overlapping edge 111, the sealing layer 140 can be made of compressible foam, the sealing layer 140 can play a role of sealing the edge beam 110 and the bottom plate 120 between the second overlapping edge 121 and the first overlapping edge 111, and dust, corrosive gas and the like can be prevented from entering the battery box 100 to damage the battery module.

The first overlapping edge 111 and the second overlapping edge 121 are connected by a screw 130, a portion of the screw 130 penetrates through the first hollow portion 1111, and the first overlapping edge 111 and the second overlapping edge 121 are connected by the screw 130, so that the reliability of the connection between the edge beam 110 and the base plate 120 can be enhanced.

As shown in FIG. 1, the surface of the first lap edge 111 facing the second lap edge 121 has a first step surface 1112, and the surface of the second lap edge 121 facing the first lap edge 111 has a second step surface 1211 that matches the first step surface 1112. It can be understood that the second step surface 1211 and the first step surface 1112 can be supported by each other, and the cooperation between the first step surface 1112 and the second step surface 1211 can ensure that the edge beam 110 and the bottom plate 120 are assembled more reliably, so that the structure of the battery box 100 is more stable, and the stable structure of the battery box 100 is beneficial to providing a reliable installation environment for the battery module.

As shown in fig. 1, the edge beam 110 may include a first main body 112, the first main body 112 has a second hollow 1121 therein, the first overlapping edge 111 is connected to the first main body 112, and the first overlapping edge 111 is located at an edge of the first main body 112. Thus, the first body part 112 may be coupled to the base plate 120 by the first overlapping edge 111, so that the first body part 112 and the base plate 120 may limit an accommodation space to place the battery module. The second hollow portion 1121 may reduce the weight of the first main body portion 112, and thus the weight of the battery box 100 may be reduced. The second hollow portion 1121 may also have a foaming layer therein, and the foaming layer can reinforce the structure of the first main portion 112, thereby reinforcing the strength of the battery box 100.

As shown in fig. 1-2, the bottom plate 120 includes a second main body portion 122, a third hollow 1221 is provided in the second main body portion 122, the second main body portion 122 is connected to the second overlapping edge 121, and the second overlapping edge 121 is located at an edge of the second main body portion 122. Thus, the second body part 122 may be connected to the side member 110 by the second overlapping edge 121, so that the side member 110 and the base plate 120 may construct an accommodating space to accommodate the battery module. The third hollow portion 1221 can reduce the weight of the second main body portion 122, and thus can reduce the weight of the battery box 100. The third hollow portion 1221 may also have a foaming layer therein, and the foaming layer may reinforce the structure of the second main body portion 122, so as to strengthen the strength of the bottom plate 120, so that the floor of the battery box 100 may better withstand the impact of broken stones or protrusions during the driving process, which is beneficial to the extension of the service life of the battery box 100 and is also beneficial to the driving safety.

Both the base plate 120 and the edge beam 110 may be aluminum alloy pieces. The aluminum alloy member has the characteristics of light weight and easiness in obtaining, so that the weight of the battery box 100 can be reduced, and the battery box 100 has the characteristic of light weight. Moreover, since the aluminum alloy material is low in cost, the manufacturing cost of the battery case 100 can be reduced.

According to the battery box 100 of the vehicle of the present invention, the edge beam 110 and the base plate 120 are connected by the screw 130, so that the reliability of the connection between the edge beam 110 and the base plate 120 can be enhanced; on the other hand, the threaded member 130 is fast to install and disassemble, can meet the requirement of mass automatic production, and is convenient to replace during maintenance.

As shown in fig. 1 to 4, a vehicle according to an embodiment of the present invention includes a battery box 100 of the vehicle as described above.

According to the vehicle of the embodiment of the present invention, by providing the first overlapping edge 111 and the second overlapping edge 121 and connecting the first overlapping edge 111 and the second overlapping edge 121 using the screws 130, it is possible to enhance the reliability of the connection of the side sill 110 and the floor panel 120 on the one hand; on the other hand, the screw 130 connection has the characteristics of quick installation and disassembly, thereby being capable of meeting the requirement of mass automatic production and being convenient to replace during maintenance.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery box for a vehicle, characterized by comprising:

an edge beam having a first overlapping edge;

a bottom panel having a second overlapping edge, the second overlapping edge and the first overlapping edge being arranged in a stacked arrangement;

the first overlapping edge and the second overlapping edge are connected through the threaded piece, the first overlapping edge is provided with a first hollowed-out part, a foaming layer is arranged in the first hollowed-out part, part of the threaded piece penetrates through the first hollowed-out part, and a sealing layer is arranged between the second overlapping edge and the first overlapping edge; wherein

The bottom plate includes: the lower plate is spaced from the upper plate, one end and the other end of each rib plate are respectively connected with the upper plate and the lower plate, the number of the rib plates is multiple, and the head and the tail of two adjacent rib plates are sequentially connected;

the surface of the first overlapping edge facing the second overlapping edge is provided with a first step surface, and the surface of the second overlapping edge facing the first overlapping edge is provided with a second step surface matched with the first step surface.

2. The battery box of a vehicle according to claim 1, wherein the side member includes a first main body portion, the first overlapping edge is connected to the first main body portion, and the first overlapping edge is located at an edge of the first main body portion.

3. The battery box of the vehicle according to claim 2, characterized in that the first main body portion has a second hollowed-out portion therein.

4. The battery box of a vehicle according to claim 1, characterized in that the floor panel includes a second main body portion, the second main body portion is connected with the second overlapping edge, and the second overlapping edge is located at an edge of the second main body portion.

5. The battery box of the vehicle according to claim 4, characterized in that the second main body portion has a third hollowed-out portion therein.

6. The vehicle battery box of claim 1, wherein at least one of the floor panel and the side sill is an aluminum alloy member.

7. A vehicle characterized by comprising a battery box of the vehicle according to any one of claims 1-6.