CN218274864U - Battery pack beam assembly, battery pack and vehicle - Google Patents

Abstract

The present disclosure relates to the technical field of vehicles, in particular to a battery pack beam assembly, a battery pack and a vehicle. The battery pack beam assembly includes an inner beam, an outer beam and a connecting longitudinal beam; the inner beam is located on the inner side of the outer beam, and the connecting longitudinal beam is respectively connected between the inner beam and the outer beam, and the connecting longitudinal beam is provided with a connecting longitudinal beam The hanging sleeve, the top of the hanging sleeve is used to connect with the upper shell of the battery pack, and the bottom end of the hanging sleeve is used to connect with the lower box of the battery pack; the inner beam, the outer beam, and the connecting longitudinal beam The structure of the battery pack beam assembly can be obtained by integral die-casting with the hanging sleeve without using additional parts, which simplifies the forming process of the battery pack beam assembly and reduces the cost to a certain extent. The weight of the battery pack beam assembly realizes the lightweight effect of the battery pack beam assembly.

Description

Battery pack beam assembly, battery pack and vehicle

technical field

The present disclosure relates to the technical field of vehicles, in particular to a battery pack beam assembly, a battery pack and a vehicle.

Background technique

New energy vehicles have achieved rapid development in recent years by virtue of their advantages such as low energy consumption, excellent driving performance, environmental friendliness, and high-tech additions. As an important part of new energy vehicles, the power battery system is the energy source of the vehicle and undertakes the functions of storing electric energy, discharging, charging, and battery management.

The battery pack beam assembly mainly includes multiple beam sections and connectors. In the prior art, when assembling the battery pack beam assembly, it is necessary to use some parts to connect multiple beam segments and connectors in sequence.

That is to say, in the prior art, when assembling the battery pack beam assembly, the assembly process is relatively complicated, and many parts are required in the assembly process, thus increasing the weight of the entire battery pack beam assembly to a certain extent.

Utility model content

In order to solve the above technical problems, the present disclosure provides a battery pack beam assembly, a battery pack and a vehicle.

In a first aspect, the present disclosure provides a battery pack beam assembly, including an inner beam, an outer beam, and a connecting longitudinal beam;

The inner cross beam is connected to the inner side of the outer side beam, the connecting longitudinal beam is connected between the inner cross beam and the outer side beam, and the connecting longitudinal beam is provided with a hanger penetrating through the connecting longitudinal beam A sleeve, the top end of the hanging sleeve is used to connect with the upper casing of the battery pack, and the bottom end of the hanging sleeve is used to connect with the lower box of the battery pack;

The inner beam, the outer side beam, the connecting longitudinal beam and the hanging sleeve are integrally formed by die-casting.

Optionally, the top end of the hanging sleeve is provided with a first sealing groove for sealingly fitting with the upper casing, and a first sealing ring is arranged in the first sealing groove;

And/or, the bottom end of the hanging sleeve is provided with a second sealing groove for sealingly fitting with the lower box body, and a second sealing ring is arranged in the second sealing groove.

Optionally, the top of the hanging sleeve is provided with a first sunken platform that is sunken toward the bottom of the hanging sleeve, and a first platform for connecting the upper shell is opened on the first sunken platform. Threaded hole;

And/or, the bottom of the hanging sleeve is provided with a second sinking platform that is sunken toward the top of the hanging sleeve, and a second sinking platform for connecting the lower box is opened on the second sinking platform. Threaded hole.

Optionally, an explosion-proof valve fixing structure for installing an explosion-proof valve and a plug-in fixing structure for installing an electrical connector are provided on the outer beam;

The explosion-proof valve fixing structure, the plug fixing structure and the outer side beam are die-cast integrally.

Optionally, the bottom of the battery pack beam assembly is also provided with mounting lugs for connecting electrical components in the battery pack, and the mounting lugs are die-cast integrally with the battery pack beam assembly.

Optionally, there are multiple installation lugs, and the multiple installation lugs are arranged at intervals along the bottom of the connecting longitudinal beam and the outer side rail.

Optionally, the inner beam is provided with a hollow fixing structure for connecting the lower box, and the hollow fixing structure is die-cast integrally with the inner beam;

The bottom end of the hollow fixed structure is provided with a third sealing groove for sealing fit with the lower box, and a third sealing ring is arranged in the third sealing groove; the bottom end of the hollow fixed structure is also provided with There is a third threaded hole for connecting the lower box.

In a second aspect, the present disclosure provides a battery pack, including a module end plate and the above-mentioned battery pack beam assembly;

The module end plate is arranged on a side of the inner beam away from the outer side beam, and the module end plate is die-cast integrally with the battery pack beam assembly.

Optionally, the side of the module end plate away from the inner cross beam is provided with a limiting surface for limiting the cell pack of the battery pack, and for cooperating with the water cooling plate of the battery pack The notch, the connection part used to connect the inner longitudinal beam of the battery pack, and the weight-reducing groove sunken towards the direction close to the outer side beam;

The top of the battery pack beam assembly is provided with a slot for fixing the battery pack copper bar base corresponding to the position of the inner beam and the module end plate;

Bolt connection matrices for connecting side beams of the battery pack are provided on both sides of the battery pack beam assembly.

In a third aspect, the present disclosure provides a vehicle, including the above-mentioned battery pack.

Compared with the prior art, the technical solutions provided by the embodiments of the present disclosure have the following advantages:

The battery pack beam assembly, the battery pack and the vehicle provided by the present disclosure are integrally formed by die-casting the inner beam, the outer side beam, the connecting longitudinal beam and the hanging sleeve. Compared with the prior art, there is no need to use additional parts to The various parts are connected, thereby simplifying the assembly process of the battery pack beam assembly.

Further, since the battery pack beam assembly is formed by integral die-casting, the problem of splicing and deformation of parts can be avoided to a certain extent, and the overall structural strength and rigidity of the battery pack beam assembly are improved.

In addition, since no additional components are required, the weight of the battery pack beam assembly is reduced to a certain extent, and the weight reduction effect of the battery pack beam assembly is achieved.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure;

FIG. 2 is a schematic top view of the battery pack according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of the oblique structure of the battery pack described in the embodiment of the present disclosure;

4 is a schematic structural diagram of a hanging sleeve in a battery pack according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a hollow fixing structure in a battery pack according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a battery pack slot according to an embodiment of the present disclosure.

Reference signs:

1. Inner beam; 2. Connecting longitudinal beam; 3. Mounting lug; 4. Card slot; 41. Card pin; 5. Hanging sleeve; 51. First sealing groove; 52. First sinking platform; 53. The second sinking platform; 54, the second sealing groove; 6, the plugging and fixing structure; 7, the outer beam; 8, the fixed structure of the explosion-proof valve; 9, the bolt connection matrix; 10, the limit surface; , Notch; 13, Connecting part; 14, Weight reduction groove; 15, The third sealing groove; 16, The third threaded hole; 17, Mounting boss.

detailed description

In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.

Referring to FIGS. 1 to 6 , this embodiment provides a battery pack beam assembly, which specifically includes an inner beam 1 , an outer side beam 7 and two connecting longitudinal beams 2 .

Among them, the inner beam 1 is located inside the outer beam 7, and two connecting longitudinal beams 2 are respectively connected between the inner beam 1 and the outer beam 7. The overall structure of the battery pack beam assembly is approximately triangular, with good structural rigidity. The setting of the connecting longitudinal beam 2 plays an obvious role in strengthening the structure, so that the whole structure obtains excellent strength and rigidity performance.

Meanwhile, the connecting longitudinal beam 2 is provided with a hanging sleeve 5 penetrating through the connecting longitudinal beam 2 . Wherein, the top end of the hanging sleeve 5 is connected with the upper shell of the battery pack, and the bottom end of the hanging sleeve 5 is connected with the lower box of the battery pack. The water cooling plate, battery bottom plate and bottom guard plate in the box are connected.

In specific implementation, the inner beam 1, the outer beam 7, the connecting longitudinal beam 2 and the hanging sleeve 5 are integrally die-cast to obtain the structure of the battery pack beam assembly without using additional parts, thus simplifying the battery life. The forming process of the battery pack beam assembly reduces the weight of the battery pack beam assembly to a certain extent, realizes the lightweight effect of the battery pack beam assembly, and greatly improves the weight of the entire battery pack beam assembly. strength.

The battery pack crossbeam assembly provided in this embodiment is formed by integral die-casting of the inner crossbeam 1, the outer side beam 7, the two connecting longitudinal beams 2 and the hanging sleeve 5. Compared with the prior art, no additional parts are needed The above-mentioned parts are connected, thereby simplifying the assembly process of the battery pack beam assembly; since the battery pack beam assembly is formed by integral die-casting, the problem of splicing and deformation of the parts can be avoided to a certain extent, improving The overall structural strength and rigidity of the battery pack beam assembly are improved; in addition, since no additional parts are required, the weight of the battery pack beam assembly is reduced to a certain extent, and the light weight of the battery pack beam assembly is realized. Quantify the effect.

In this embodiment, a first sealing groove 51 sealingly fitted with the upper casing can be provided on the top of the hanging sleeve 5, and a first sealing ring is arranged in the first sealing groove 51, thereby improving the suspension sleeve. 5 and the tightness between the upper shell.

Simultaneously, the bottom of the hanging sleeve 5 can also be provided with a second sealing groove 54 that is sealingly matched with the lower box body, and a second sealing ring is arranged in the second sealing groove 54 to improve the connection between the hanging sleeve 5 and the lower box. The tightness between the body, and then make the battery pack beam assembly and the battery pack to form a relatively completely sealed space, improve the sealing between the entire battery pack beam assembly and the battery pack, prevent moisture in the external environment, Impurities such as dust enter into the battery pack beam assembly, further protecting the structure of the battery pack beam assembly.

In some other embodiments, the above-mentioned first sealing groove 51 may also be provided only at the top end of the hanging sleeve 5, or the second sealing groove 51 that is sealingly fitted with the lower box may only be provided at the bottom end of the hanging sleeve 5. Seal groove 54 .

In this embodiment, the top of the hanging sleeve 5 may be provided with a first sinking platform 52 sunken toward the bottom of the hanging sleeve 5, and the first sinking platform 52 is provided with a first threaded hole connecting the upper casing. The upper casing and the top of the hanging sleeve 5 are more firmly and reliably connected together through bolts or bolt-like parts that can be matched with the first threaded holes.

Simultaneously, the bottom of hanging sleeve 5 also can be provided with the second sinking platform 53 that is sunken toward the top direction of hanging sleeve 5, offers the second threaded hole that connects lower casing on the second sinking platform 53, to pass can be connected with The bolts or bolt-like parts matched to the second threaded holes connect the upper casing and the bottom of the hanging sleeve 5 more firmly and reliably, thereby further improving the connection between the battery pack beam assembly and the battery pack strength.

In some other embodiments, it is also possible to set only the top of the hanging sleeve 5 on the top of the hanging sleeve 5, which is sunken toward the bottom of the hanging sleeve 5, and the first sinking platform 52 is opened to connect the upper casing. The first threaded hole, or only the bottom of the hanging sleeve 5 can be provided with a second sinking platform 53 that is sunken toward the top of the hanging sleeve 5, and the second sinking platform 53 is opened to connect the second box of the lower box. Threaded hole.

Of course, the top of the hanging sleeve 5 can also be connected with the upper casing by riveting, gluing, etc.; similarly, the bottom of the hanging sleeve 5 can also be connected with the lower casing by riveting, gluing, etc. , as long as the two ends of the hanging sleeve 5 can be firmly connected with the upper casing and the lower box body respectively, it can be selected arbitrarily according to specific conditions.

As shown in FIG. 1 , an explosion-proof valve fixing structure 8 for installing an explosion-proof valve and a plug-in fixing structure 6 for installing an electrical connector are provided on the outer side beam 7 . Wherein, the explosion-proof valve is provided with a first installation head, which can be specifically a first installation hole, and the explosion-proof valve fixing structure 8 is provided with first fixing holes corresponding to the first installation holes of the explosion-proof valve. Specifically, the explosion-proof valve is fixed on the outer side sill 7 through fasteners passed through the first installation hole and the first fixing hole, and the fasteners may specifically be screws or the like. During specific implementation, the number of the first installation hole and the first fixing hole can be two or more, and at least two first installation holes and the first fixing hole are provided to help firmly fix the explosion-proof valve on the outer side beam 7 In this way, the stability of the entire battery pack beam assembly structure can be improved, and the explosion-proof effect of the explosion-proof valve can be prevented from being separated from the outer beam 7 to prevent the explosion-proof valve from being affected. In this embodiment, the fixing surface of the explosion-proof valve fixing structure 8 is a circular surface, two connecting ears are arranged on both sides of the circular fixing surface, and a first fixing hole is respectively arranged on the two connecting ears. During specific implementation, the numbers of the first fixing holes and the first installation holes thereon can be adjusted according to actual needs, the size of the explosion-proof valve fixing structure 8 and the explosion-proof valve.

Similarly, the electrical connector is also provided with a second installation head, the second installation head can specifically be a second installation hole, and the connection relationship between the electrical connector and the plugging and fixing structure 6 on the outer side beam 7 can refer to the above-mentioned explosion-proof valve and The connection relationship of the explosion-proof valve fixing structure 8 is carried out, and details will not be repeated here.

In this embodiment, the fixing surface of the plugging and fixing structure 6 is a square surface, and each of the four corners of the square fixing surface is provided with a second fixing hole corresponding to the second installation hole one by one. During specific implementation, the numbers of the second fixing holes and the second mounting holes thereon can be adjusted according to actual needs, the size of the plug fixing structure 6 and the electrical connector.

During specific implementation, the explosion-proof valve fixed structure 8, the plug-in fixed structure 6 and the outer side beam 7 are integrally die-cast, thereby improving the connection strength of the explosion-proof valve fixed structure 8, the plug-in fixed structure 6 and the outer side beam 7, ensuring the explosion-proof valve and the outer side beam 7. Fixing effect of electrical connectors.

In some specific implementations, the bottom of the battery pack crossbeam assembly is also provided with mounting lugs 3 that connect the electrical components in the battery pack. The stability and reliability of the connection with the battery pack beam assembly.

It can be understood that the mounting lug 3 is provided with a third fixing hole, and at the same time, the electrical components in the battery pack are provided with third mounting holes corresponding to the third fixing holes one by one, and the electrical components pass through the third mounting holes. The fasteners in the hole and the third fixing hole are fixed on the battery pack crossbeam assembly. The fasteners can be screws, rivets, etc., which is conducive to firmly connecting the electrical components to the battery pack crossbeam assembly. Of course, the electrical parts can also be fixed on the bottom of the battery pack crossbeam assembly by gluing, etc., as long as a stable connection between the electrical parts and the battery pack crossbeam assembly can be achieved, and can be selected arbitrarily according to specific conditions.

Specifically, there are a plurality of mounting lugs 3, and the plurality of mounting lugs 3 are arranged at intervals along the bottom connecting the longitudinal beam 2 and the outer side beam 7, so as to further improve the impact of the battery pack beam assembly on the electrical components in the battery pack. Excellent fixing effect and connection strength, compact structure. In this embodiment, there are specifically five mounting lugs 3 , and the five mounting lugs 3 are respectively arranged at intervals on opposite sides of the connecting longitudinal beam 2 and the outer side rail 7 . Of course, the number of mounting lugs 3 and the arrangement and arrangement gap can be flexibly designed according to the actual electrical component fixing requirements and the electrical component structure, as long as the electrical components can be firmly fixed on the battery pack beam assembly. Yes, it can be selected arbitrarily according to the actual situation, and there are no too many restrictions here.

Referring to Fig. 3, by setting the hollow fixed structure 11 connected to the lower box on the inner beam 1, wherein the hollow fixed structure 11 is specifically a vertical through-type structure, which realizes the design of uniform wall thickness, so that the hollow fixed structure can be guaranteed 11 In addition to its own strength, it also further achieves the effect of weight reduction and achieves the purpose of lightweight design. At the same time, the hollow fixing structure 11 and the inner beam 1 are die-cast integrally, thereby improving the integrity and connection strength between the hollow fixing structure 11 and the inner beam 1 .

Further, by setting the third sealing groove 15 which is sealingly matched with the lower box body at the bottom end of the hollow fixing structure 11, and the third sealing ring is arranged in the third sealing groove 15, thereby further ensuring that the lower box body is fixed with the hollow body. Sealing properties between structures 11. In addition, the bottom end of the hollow fixing structure 11 is also provided with a third threaded hole 16 connecting the lower box body, thereby making the connection between the hollow fixing structure 11 and the lower box body more reliable and achieving a good fixation of the lower box body . Of course, the hollow fixing structure 11 and the lower box body can also be connected by riveting, gluing and other connection methods, as long as the lower box body can be firmly fixed with the hollow fixing structure 11 .

During specific implementation, the bottom end of the hollow fixing structure 11 is mainly connected with components such as the water cooling plate, the battery bottom plate, and the bottom guard plate in the lower box. In order to further improve the fixing effect of the battery pack beam assembly on the bottom guard plate, a mounting boss 17 for connecting with the bottom guard plate is also provided at the bottom of the outer beam 7, and the mounting boss 17 and the battery pack beam assembly One-piece die-casting. Wherein, there are a plurality of installation bosses 17 , and the plurality of installation bosses 17 are arranged at intervals along the bottom of the outer side rail 7 . Specifically, the bottom guard plate can be connected with the installation boss 17 through bolts, rivets and the like. Certainly, the bottom guard plate can also be connected with the installation boss 17 by gluing.

This embodiment also provides a battery pack, which specifically includes a module end plate and a battery pack beam assembly.

Wherein, the specific structure and realization principle of the battery pack beam assembly in this embodiment are the same as those of the above battery pack beam assembly, and can bring the same or similar technical effects.

During specific implementation, the module end plate is located on the side of the inner beam 1 away from the outer beam 7, and the module end plate and the battery pack beam assembly are integrally die-cast, that is, the module end plate is also integrated into the battery pack beam assembly In the process, while realizing the structural integration between the module end plate and the battery pack beam assembly, the functions of the module end plate are further integrated into the battery pack beam assembly, achieving a simplification and light weight of the entire battery pack structure. purpose of quantification.

Referring to Figure 3, by setting a limit surface 10 on the side of the module end plate away from the inner cross beam 1 to limit the cell group of the battery pack, the cells can be aligned with the cross beams and longitudinal beams in the battery pack. The group is limited. In addition, a notch 12 for matching the water cooling plate of the battery pack is provided on the side away from the inner beam 1 of the module end plate, so as to fix the position of the water cooling plate of the battery pack. At the same time, the side of the module end plate far away from the inner beam 1 is also provided with a connecting part 13 connected to the inner longitudinal beam of the battery pack, so as to connect the battery pack to the module end plate through bolts, riveting, gluing, etc. Together. The side of the module end plate far away from the inner beam 1 is also provided with a weight-reducing groove 14 that is sunken towards the direction of the outer side beam 7, so as to further realize the weight reduction effect on the entire module end plate.

Further, the top of the battery pack beam assembly is provided with a slot 4 for fixing the battery pack copper bar base at the position corresponding to the inner beam 1 and the end plate of the module. The slot 4 includes a pin 41. During specific implementation, only The base of the battery pack copper bar needs to be inserted into the card slot 4 to engage with the card pin 41, so that the base of the battery pack copper bar, the battery pack beam assembly and the module end plate can be well fixed, and the fixing method is convenient. The structure is compact, and the card slot 4 and the battery pack beam assembly are integrally die-cast.

At the same time, the two sides of the battery pack beam assembly are provided with a bolt connection matrix 9 for connecting the left and right side beams of the battery pack, thereby improving the connection strength between the battery pack beam assembly and the battery pack side beam, thereby improving the bolt connection. Integrity and connection strength between the matrix 9 and the battery pack beam assembly. In this embodiment, the bolt connection matrix 9 is specifically a hexagonal bolt connection matrix 9, which further improves the connection strength between the battery pack beam assembly and the battery pack edge beam. During specific implementation, the number of sides of the bolt connection matrix 9 can be designed according to actual needs and the size of the battery pack beam assembly and the battery pack edge beam, as long as the firm connection between the battery pack beam assembly and the battery pack edge beam can be satisfied. Can. It can be understood that the battery pack beam assembly and the battery pack edge beam can also be connected together by riveting, gluing and other connection methods.

This embodiment also provides a vehicle, including a battery pack.

Wherein, the specific structure and implementation principle of the battery pack in this embodiment are the same as those of the above-mentioned battery pack, and can bring about the same or similar technical effects.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Moreover, the term "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed, Or also include elements inherent in such a process, method, article or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific implementation manners of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A battery pack beam assembly is characterized by comprising an inner beam, an outer beam and a connecting longitudinal beam;

the inner cross beam is connected to the inner side of the outer edge beam, the connecting longitudinal beam is connected between the inner cross beam and the outer edge beam, a hanging sleeve penetrating through the connecting longitudinal beam is arranged on the connecting longitudinal beam, the top end of the hanging sleeve is used for being connected with an upper shell of a battery pack, and the bottom end of the hanging sleeve is used for being connected with a lower box body of the battery pack;

the inner cross beam, the outer edge beam, the connecting longitudinal beam and the hanging sleeve are integrally formed in a die-casting mode.

2. The battery pack beam assembly according to claim 1, wherein a first sealing groove for sealing engagement with the upper housing is formed at the top end of the hanging sleeve, and a first sealing ring is arranged in the first sealing groove;

and/or a second sealing groove used for being matched with the lower box body in a sealing mode is formed in the bottom end of the hanging sleeve, and a second sealing ring is arranged in the second sealing groove.

3. The battery pack beam assembly according to claim 1, wherein a first sinking platform recessed towards the bottom of the hanging sleeve is arranged at the top of the hanging sleeve, and a first threaded hole for connecting the upper shell is formed in the first sinking platform;

and/or a second sinking platform which is sunken towards the top direction of the hanging sleeve is arranged at the bottom of the hanging sleeve, and a second threaded hole used for connecting the lower box body is formed in the second sinking platform.

4. The battery pack beam assembly of claim 1, wherein the outer beam is provided with an explosion-proof valve fixing structure for mounting an explosion-proof valve and a plug-in fixing structure for mounting an electrical connector;

the explosion-proof valve fixing structure, the inserting fixing structure and the outer edge beam are integrally formed in a die-casting mode.

5. The battery pack beam assembly of claim 1, wherein a mounting lug for connecting electrical components in the battery pack is further disposed at the bottom of the battery pack beam assembly, and the mounting lug is integrally die-cast with the battery pack beam assembly.

6. The battery pack beam assembly of claim 5, wherein the number of the mounting lugs is multiple, and the multiple mounting lugs are arranged at intervals along the bottom of the connecting longitudinal beam and the outer side beam.

7. The battery pack beam assembly according to claim 1, wherein a hollow fixing structure for connecting the lower box body is arranged on the inner beam, and the hollow fixing structure and the inner beam are integrally formed by die-casting;

a third sealing groove used for being matched with the lower box body in a sealing mode is formed in the bottom end of the hollow fixing structure, and a third sealing ring is arranged in the third sealing groove; the bottom end of the hollow fixing structure is also provided with a third threaded hole used for connecting the lower box body.

8. A battery pack comprising module end plates and a battery pack beam assembly according to any one of claims 1 to 7;

the module end plate set up in the one side of keeping away from of inner beam the outer boundary beam, the module end plate with the integrative die-casting of battery package crossbeam assembly is formed.

9. The battery pack according to claim 8, wherein a side of the module end plate away from the inner cross beam is provided with a limiting surface for limiting a battery core group of the battery pack, a notch for matching a water cooling plate of the battery pack, a connecting part for connecting inner longitudinal beams of the battery pack, and a weight reduction groove recessed toward a direction close to the outer side beam;

a clamping groove for fixing a copper bar base of the battery pack is formed in the position, corresponding to the inner cross beam and the module end plate, of the top of the battery pack cross beam assembly;

and bolt connection matrixes used for connecting the boundary beams of the battery pack are arranged on two sides of the battery pack beam assembly.

10. A vehicle characterized by comprising the battery pack according to claim 8 or 9.

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