CN117410636A - Lower box body of domain control battery pack, domain control battery pack and vehicle - Google Patents

Abstract

The invention discloses a domain control battery pack lower box body, a domain control battery pack and a vehicle, wherein the domain control battery pack lower box body comprises a box body, a cross beam and a module end plate; the box body is an integral molding piece; the cross beam is slidably arranged in the box body; the module end plate with the crossbeam deviates from one side fixed connection of the diapire of case body, and is used for connecting battery module. The technical scheme of the invention can improve the structural reliability of the box body and is convenient for the installation of the battery module.

Description

Lower box body of domain control battery pack, domain control battery pack and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a lower box body of a domain control battery pack, the domain control battery pack and a vehicle.

Background

The battery pack box body is used as a bearing part of the battery pack, and the service life of the battery pack is directly influenced by the internal structure and the layout. The box under the present battery package, spare part quantity is many, and connection technology is complicated, influences the reliability of box structure easily, simultaneously, because of the position installation control of battery module is more difficult, usually needs extra frock clamp to assist the assembly, reduces the convenience of battery module installation.

Disclosure of Invention

The invention mainly aims to provide a lower box body of a domain control battery pack, which aims to improve the structural reliability of a box body and simultaneously facilitate the installation of a battery module.

In order to achieve the above object, the present invention provides a domain control battery pack lower case, comprising:

the box body is an integrated part;

the cross beam is slidably arranged in the box body; and

and the module end plate is fixedly connected with one side of the cross beam, which is away from the bottom wall of the box body, and is used for connecting the battery module.

Optionally, the beam includes a main body portion, and the main body portion is fixedly connected with the module end plate.

Optionally, the main body portion is connected to the module end plate by bolts;

or, the main body part and the module end plate are integrally formed.

Optionally, the main body is connected with the bottom wall of the box body through a flow drilling screw;

and/or structural adhesive is arranged between the main body part and the bottom wall of the box body.

Optionally, in the transverse direction of the cross beam, an end portion of the main body portion is connected with a lap joint portion, the lap joint portion and the main body portion form a first lap joint platform, and a second lap joint platform adapted to the first lap joint platform is arranged on the box body.

Optionally, the first landing and the second landing are connected by a bolt lock;

and/or a sliding gap is reserved between at least one of the two end parts of the main body part and the side wall of the box body.

Optionally, in the sliding direction of the cross beams, at least one cross beam is arranged, one cross beam divides the space in the box body into a domain control unit installation area and a battery module installation area, and the rest cross beams are all positioned in the battery module installation area.

Optionally, in the battery module installation area, the case body is equipped with the third overlap joint platform, the third overlap joint platform is kept away from the crossbeam, and is used for the cooperation the crossbeam to jointly support fixedly the battery module.

Optionally, the box body is integrated with the pipeline interface in, the box still includes the cold plate under the domain accuse battery package, the cold plate with pipeline interface connection, and be located the box is originally internal.

Optionally, a domain control unit is arranged in the domain control unit installation area, the cold plate comprises a first cold plate, and the first cold plate is positioned below the domain control unit;

and/or the battery module is arranged in the battery module mounting area, the cold plate further comprises a second cold plate, and the second cold plate is positioned below the battery module.

Optionally, the box body is any one of an aluminum die casting and a plastic composite;

and/or, the cross beam and the module end plate are extrusion molding pieces;

and/or, the cross beam and the module end plate are profiles with a harmonica-shaped pipe section.

The invention also provides a domain control battery pack, which comprises the lower box body of the domain control battery pack.

The invention also proposes a vehicle comprising a domain controlled battery pack as described above.

According to the technical scheme, the box body is used as a bearing part of the battery pack and is manufactured in an integrated forming mode, so that the structural strength and the sealing performance of the box body are effectively improved, the processing steps of the box body can be simplified, the number of parts is reduced, and the cost is saved.

The battery module can be reliably assembled in the box body through the connection of the module end plate and the cross beam, so that the normal use of the battery pack is ensured; on the other hand, the cross beam is in sliding connection with the box body, so that the space in the box body is divided by the cross beam conveniently, the assembly of battery modules with different numbers and different models is adapted, and the compatibility of the box body and the installation convenience of the battery modules are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a lower case of a domain controlled battery pack according to the present invention;

FIG. 2 is an exploded view of the lower case of the domain controlled battery pack of FIG. 1;

FIG. 3 is a side view of the lower housing of the domain controlled battery pack of FIG. 1 from a first perspective;

FIG. 4 is a side view of the lower housing of the domain controlled battery pack of FIG. 1 from a second perspective;

FIG. 5 is a cross-sectional view of the lower case of the domain controlled battery pack of FIG. 4;

FIG. 6 is a top view of the lower case of the domain controlled battery pack of FIG. 1;

fig. 7 is a top view of another embodiment of the lower case of the domain controlled battery pack of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Box body	31	Module end plate
11	Second lapping table	32	Battery module
				12	Third lapping table	41	Bolt
20	Cross beam	42	Flow drill screw
				21	Main body part	50	Domain control unit
22	Overlap joint	60	Cold plate
				23	First lapping table

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a lower box body of a domain control battery pack.

Referring to fig. 1 to 7, in an embodiment of the present invention, the domain controlled battery pack lower case includes a case body 10, a cross member 20, and a module end plate 31; the case body 10 is an integral molding; a cross member 20 slidably disposed within the tank body 10; the module end plate 31 with the crossbeam 20 deviates from one side fixed connection of the diapire of case body 10, and is used for connecting battery module 32, so, can effectively promote the structural reliability of case body 10, simultaneously, make things convenient for battery module 32's installation.

The box body 10 is integrated into one piece spare, and bulk strength is high and even, compares and connects each spare part through modes such as welding, and the bulk reliability that structural strength who can reliably avoid box body 10 peripheral corner is poor leads to reduces, simultaneously, because of the bottom plate that forms box body 10 is closely connected with the side wall board, the leakproofness of box body 10 can be guaranteed to can also simplify processing procedure, reduce the quantity of spare part, practice thrift the cost.

The slidable is provided with crossbeam 20 in the case body 10, and the quantity of crossbeam 20 can set up according to the size of case body 10 to and the assembly demand, wherein, utilize structural design such as slide rail, smooth chamber, supplementary crossbeam 20 assembly to case body 10, promote the assembly efficiency of crossbeam 20 to cut apart the space in the case body 10 through sliding crossbeam 20, promote the compatibility of case body 10, the battery module 32 of convenient different quantity and model can reliably assemble to in the case body 10 through the connection with crossbeam 20, and then, can reduce frock clamp's use, can also promote the installation convenience of battery module 32. In addition, the cross length of the cross member 20 is set according to the size of the case body 10, and at least one module end plate 31 may be provided on the cross member 20 according to a specific size, that is, one battery module 32 may be provided in the cross direction of the cross member 20, and a plurality of battery modules 32 may be provided side by side and at intervals.

The module end plate 31 is mainly disposed at an end of the battery module 32, and may be a part of the housing of the battery module 32, or may be integrally fixed with the housing of the battery module 32 by a connection method such as plugging; the beam 20 and the module end plate 31 can be fixed in modes such as bolting, clamping and bonding, so that the mounting stability of the battery module 32 in the box body 10 is effectively ensured, and meanwhile, the lateral collision and extrusion rigidity of the battery pack can be improved, thereby improving the use safety of the battery pack. In addition, the module end plate 31 is arranged on one side of the beam 20 away from the bottom wall of the box body 10, so that the beam 20 and the battery module 32 can be more compact, the connection stability is improved, and the space occupied in the box body 10 is reduced.

In the technical scheme of the invention, the box body 10 is used as a bearing part of the battery pack and is manufactured in an integrated forming mode, so that the structural strength and the sealing performance of the box body 10 are effectively improved, the processing steps of the box body 10 can be simplified, the number of parts is reduced, and the cost is saved.

The cross beam 20 is slidably arranged in the box body 10, on one hand, the battery module 32 can be reliably assembled in the box body 10 through the connection of the module end plate 31 and the cross beam 20 as a transfer beam for connecting the module end plate 31, so that the normal use of the battery pack is ensured; on the other hand, the cross beam 20 is in sliding connection with the box body 10, so that the cross beam 20 can conveniently divide the space in the box body 10, and accordingly assembly of battery modules 32 of different numbers and different models can be adapted, and compatibility of the box body 10 and installation convenience of the battery modules 32 can be improved.

Referring to fig. 1 to 2 and 5, in an embodiment, the beam 20 includes a main body 21, the main body 21 is fixedly connected with the module end plate 31, it is understood that the beam 20 spans two side walls of the box body 10, and the main body 21 extends along the span direction of the beam 20 and has a larger span area, so as to conveniently support the module end plate 31, and has a larger effective contact area with the module end plate 31, so that the connection with the module end plate 31 is convenient, and meanwhile, the connection stability of the beam 20 and the module end plate 31 is effectively improved, and further, when the beam 20 and the module end plate 31 are fixed into a whole, the beam 20 and the module end plate 31 jointly support the box side wall of the box body 10, so that the lateral collision and extrusion rigidity of the battery pack are greatly improved.

Specifically, in one embodiment, the main body 21 is connected to the module end plate 31 by bolts 41, and as shown in fig. 2 and 5, the module end plate 31 is penetrated by long bolts 41 and connected to the main body 21, so that the module end plate 31 is reliably assembled.

In another embodiment, the main body 21 and the module end plate 31 are integrally formed, so that the connection strength between the beam 20 and the module end plate 31 can be effectively ensured, the number of parts can be reduced, and the cost can be saved.

Referring to fig. 2 to 5, in an embodiment, the main body 21 is connected to the bottom wall of the tank body 10 by a flow drilling screw 42, and it can be understood that the flow drilling screw 42 technology is adopted to reduce the process of punching holes in the bottom wall of the tank body 10, and the heat generated by high-speed rotation of the screw is directly utilized to melt the tank body 10, and penetrates through the bottom wall to be in threaded connection with the cross beam 20, so as to realize connection between the cross beam 20 and the tank body 10. Of course, when the width of the battery pack is narrow, other connection means may be used for fixing.

Further, in order to ensure the tightness of the box body 10, in an embodiment, a structural adhesive is disposed between the main body 21, the flow drilling screw 42 and the box body 10, that is, the flow drilling screw 42 is matched with the structural adhesive to seal the via hole drilled by the screw, thereby realizing the sealing of the IP67 and ensuring the tightness of the box body 10.

In another embodiment, a structural adhesive is provided between the main body 21 and the bottom wall of the tank body 10, and the connection of the cross member 20 to the tank body 10 can be achieved as well.

Referring to fig. 2 and 5, in an embodiment, in a transverse direction of the beam 20, an end portion of the main body 21 is connected with a lap joint portion 22, the lap joint portion 22 and the main body 21 form a first lap joint table 23, and the box body 10 is provided with a second lap joint table 11 adapted to the first lap joint table 23, wherein the main body 21 and the lap joint portion 22 are integrally formed, when the beam 20 is placed in the box body 10, the beam 20 can be stably placed in the box body 10 through cooperation of the first lap joint table 23 and the second lap joint table 11, further connection operation between the beam 20 and the box body 10 and between the beam 20 and the module end plate 31 is facilitated by using supporting effect of the box body 10 on the beam 20, and meanwhile, sliding of the beam 20 along the second lap joint table 11 through the first lap joint table 23 is also facilitated.

Further, in an embodiment, the first lapping table 23 and the second lapping table 11 are locked and connected by bolts 41, so that the first lapping table 23 and the second lapping table 11 are connected by bolts 41 after the cross beam 20 is moved and a specific position thereof on the box body 10 is selected, the cross beam 20 and the box body 10 can be fixedly connected. And when the crossbeam 20 and the box body 10 are further connected through the flow drill screw 42, each end of the crossbeam 20 is respectively connected with the box body 10 and the module end plate 31, so that the connection stability of the crossbeam 20 and the box body 10 is greatly improved, and further, the assembly stability of the battery module 32 and the box body 10 is improved, and the use safety of the battery pack is improved. However, in other embodiments, the first landing stage 23 and the second landing stage 11 may be connected by fastening, bonding, or the like.

Specifically, in an embodiment, a sliding gap is left between at least one of the two ends of the main body 21 and the side wall of the box body 10, so that the sliding of the beam 20 in the box body 10 is facilitated, and the sliding convenience and the sliding smoothness of the beam 20 are improved.

Referring to fig. 1 to 2 in combination with fig. 6 to 7, in an embodiment, in a sliding direction of the cross member 20, the cross member 20 is provided with at least one, one of the cross members 20 partitions a space in the case body 10 into a domain control unit installation area and a battery module installation area, and the rest of the cross members 20 are located in the battery module installation area, wherein a domain control unit 50 is installed in the domain control unit installation area, the domain control unit 50 is integrated with PMS, DCDC, VCU, PDU and other modules, the battery module 32 is installed in the battery module installation area, and the domain control unit 50 and the battery module 32 are partitioned by the cross member 20, so that risks of mutual influence of the two are reduced, and further, the operation and maintenance at a later stage are also facilitated.

Further, in an embodiment, in the battery module mounting area, the case body 10 is provided with a third lapping table 12, the third lapping table 12 is away from the beam 20 and is used for cooperating with the beam 20 to jointly support and fix the battery module 32, wherein the third lapping table 12 is formed on the case side wall parallel to the crossing direction on the case body 10, at this time, along the sliding direction of the beam 20, both ends of the battery module 32 are provided with module end plates 31, and the two ends of the battery module 32 are jointly supported by the connection of the beam 20 and the third lapping table 12 with the two module end plates 31, so as to further improve the mounting stability of the battery module 32 in the case body 10.

Referring to fig. 2, in an embodiment, the box body 10 is integrated with a pipe interface, the lower box of the domain control battery pack further includes a cold plate 60, and the cold plate 60 is connected with the pipe interface and is located in the box body 10, so as to be used for cooling the power module and/or the battery module 32 of the domain control unit 50, thereby improving the use safety of the battery pack.

Specifically, in an embodiment, the domain control unit 50 is disposed in the domain control unit mounting area, the cold plate 60 includes a first cold plate 60, the first cold plate 60 is located below the domain control unit 50, and the first cold plate 60 is located between the domain control unit 50 and the bottom wall of the box body 10, so as to cool the domain control unit 50 in a targeted manner, which is efficient and accurate, and has good cooling efficiency.

Specifically, in an embodiment, the battery module 32 is disposed in the battery module mounting area, the cold plate 60 further includes a second cold plate 60, the second cold plate 60 is located below the battery module 32, and the second cold plate 60 is located between the battery module 32 and the bottom wall of the case body 10, so as to cool the battery module 32 pointedly, and the cooling efficiency is high and accurate.

Alternatively, in an embodiment, the box body 10 is any one of an aluminum die cast and a plastic composite, i.e., the box body 10 is an aluminum die cast; alternatively, the case body 10 is a plastic composite. Of course, in other embodiments, the case body 10 may be formed integrally, which is not limited herein.

Optionally, in an embodiment, the cross beam 20 and the module end plate 31 are each extruded members; and/or, the crossbeam 20 and the module end plate 31 are all sectional materials with a harmonica-shaped pipe section, so that the molding is fast, the structure is strong, the weight of the crossbeam 20 and the module end plate 31 can be reduced, the weight of the battery pack is reduced, and the energy density of the battery pack is higher. In addition, the mouth tube organ section can be used as a branch pipe of a pipeline so as to facilitate cooling of the battery pack.

The invention also provides a domain control battery pack, which comprises a domain control battery pack lower box body, and the specific structure of the domain control battery pack lower box body refers to the embodiment, and because the domain control battery pack adopts all the technical schemes of all the embodiments, the domain control battery pack at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted.

The invention also provides a vehicle, which comprises the domain control battery pack, and the specific structure of the domain control battery pack refers to the embodiment, and because the vehicle adopts all the technical schemes of all the embodiments, the vehicle at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (13)

1. A domain control battery pack lower case, comprising:

the box body is an integrated part;

the cross beam is slidably arranged in the box body; and

and the module end plate is fixedly connected with one side of the cross beam, which is away from the bottom wall of the box body, and is used for connecting the battery module.

2. The domain controlled battery pack lower case of claim 1, wherein the cross member comprises a main body portion fixedly connected to the module end plate.

3. The domain controlled battery pack lower case according to claim 2, wherein the main body portion is connected to the module end plate by bolts;

or, the main body part and the module end plate are integrally formed.

4. The domain controlled battery pack lower case according to claim 2, wherein the main body portion is connected to the bottom wall of the case body by a flow drill screw;

and/or structural adhesive is arranged between the main body part and the bottom wall of the box body.

5. The domain controlled battery pack lower case according to claim 2, wherein in a lateral direction of the cross member, an end portion of the main body portion is connected with a lap joint portion, the lap joint portion and the main body portion form a first lap joint stage, and the case body is provided with a second lap joint stage adapted to the first lap joint stage.

6. The domain controlled battery pack lower case of claim 5, wherein the first landing and the second landing are connected by a bolt lock;

and/or a sliding gap is reserved between at least one of the two end parts of the main body part and the side wall of the box body.

7. The under-domain-controlled-battery-pack case according to claim 1, wherein at least one of the cross members is provided in a sliding direction of the cross member, one of the cross members partitions a space in the case into a domain-controlled-unit mounting area and a battery module mounting area, and the remaining cross members are located in the battery module mounting area.

8. The under-domain-controlled-battery-pack case according to claim 7, wherein the case body is provided with a third landing at the battery module mounting area, the third landing being remote from the cross member and adapted to cooperate with the cross member to support and fix the battery module together.

9. The domain controlled battery pack lower case of claim 7, wherein a pipeline interface is integrated in the case body, and the domain controlled battery pack lower case further comprises a cold plate connected with the pipeline interface and positioned in the case body.

10. The lower case of a domain control battery pack according to claim 9, wherein a domain control unit is provided in the domain control unit installation area, the cold plate comprises a first cold plate, and the first cold plate is positioned below the domain control unit;

and/or the battery module is arranged in the battery module mounting area, the cold plate further comprises a second cold plate, and the second cold plate is positioned below the battery module.

11. The domain controlled battery under-package box of claim 1, wherein the box body is any one of an aluminum die cast and a plastic composite;

and/or, the cross beam and the module end plate are extrusion molding pieces;

and/or, the cross beam and the module end plate are profiles with a harmonica-shaped pipe section.

12. A domain controlled battery pack comprising the domain controlled battery pack lower case according to any one of claims 1 to 11.

13. A vehicle comprising the domain control battery pack of claim 12.