CN214068834U

CN214068834U - Battery pack and electric automobile

Info

Publication number: CN214068834U
Application number: CN202120107863.4U
Authority: CN
Inventors: 郭立立; 席兵荣; 程志刚; 夏清松; 王翔; 王明旺; 陈斌斌; 王华文
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-08-27
Anticipated expiration: 2031-01-15

Abstract

A battery pack, comprising: the battery box comprises a box body, a bottom plate and a battery module, wherein the box body is buckled on the battery module and is fixedly connected with the bottom plate; the battery module comprises a battery pack and a mounting bracket, the battery pack comprises a plurality of battery monomers, the mounting bracket is a plastic part, and the mounting bracket is arranged on the battery pack in a surrounding manner; the bottom plate is provided with a liquid cooling pipeline, and the liquid cooling pipeline is used for cooling the battery module. The bottom plate is the dull and stereotyped structure and integrates the liquid cooling pipeline, both convenient processing and the inside usage space of saving battery package, and the metal part is replaced by the working of plastics to the installing support, can alleviate the weight of battery package, reduces use cost. The utility model also provides an electric automobile, include the battery package.

Description

Battery pack and electric automobile

Technical Field

The disclosure relates to the technical field of power automobiles, in particular to a battery pack and an electric automobile.

Background

With the popularization of new energy automobiles, people have higher and higher technical requirements on the battery pack, and high energy density and low cost become key development directions of the battery pack. The battery is a core component that determines the performance of the electric vehicle. On one hand, during the operation and charge and discharge of the vehicle, the performance and service life of the battery are affected by the overhigh temperature of the battery, so that the battery needs to be ensured to work in a proper temperature range. The liquid cooling system sets up inside the battery box alone as indispensable partly, and this kind of scheme can increase battery package weight, occupies a large amount of spaces in the battery package. In the prior art, when the box body is integrated with the liquid cooling pipeline, the box body is mostly in a more complex structural form. When the base plate and the liquid cooling pipeline are integrated, the side plate enclosure frame is arranged above the base plate, and the manufacturing cost of the battery pack is increased by the two technical schemes; on the other hand, a plurality of battery packs are arranged in the battery pack, and the assembly form of the battery packs greatly influences the performance of the battery pack. In the prior art, the metal mounting part is arranged around the outside of a plurality of battery monomers to assemble the battery pack, and the metal mounting part can increase the weight and the use cost of the battery pack. Therefore, it is necessary to provide a technical solution that can solve the above technical problems and meet the technical requirements of high grouping efficiency and low cost.

SUMMERY OF THE UTILITY MODEL

To prior art's not enough, this disclosure provides a battery package, and battery package includes box, bottom plate and battery module, and battery module installs on the bottom plate, and the box is detained and is established on battery module and with bottom plate fixed connection. The mounting bracket is arranged outside the plurality of battery monomers in a surrounding manner to assemble the battery module. The liquid cooling pipeline is arranged in the bottom plate and can be used for cooling the battery module. The bottom plate is the dull and stereotyped structure and integrates the liquid cooling pipeline, both convenient processing and the inside usage space of saving battery package, and the metal part is replaced by the working of plastics to the installing support, can alleviate the weight of battery package, reduces use cost.

A first aspect of the present disclosure provides a battery pack, including: the battery box comprises a box body, a bottom plate and a battery module, wherein the box body is buckled on the battery module and is fixedly connected with the bottom plate; the battery module comprises a battery pack and a mounting bracket, the battery pack comprises a plurality of battery monomers, the mounting bracket is a plastic part, and the mounting bracket is arranged on the battery pack in a surrounding manner; the bottom plate is provided with a liquid cooling pipeline, and the liquid cooling pipeline is used for cooling the battery module.

Preferably, the bottom plate comprises a first bottom plate and a second bottom plate, the second bottom plate is arranged on the outer side of the first bottom plate, the second bottom plate is provided with a liquid inlet structure and a liquid outlet structure, and the liquid cooling pipeline is communicated with the liquid inlet structure and the liquid outlet structure.

Preferably, the number of the liquid inlet structures and the liquid outlet structures is at least one.

Preferably, the bottom plate is provided with a connecting piece protruding outwards, and the connecting piece is provided with a hole position for connecting a vehicle body.

Preferably, the outer edge of the bottom plate is uniformly provided with first mounting holes, the first mounting holes are fixedly connected with the box body, and the first mounting holes are not intersected with the liquid cooling pipelines.

Preferably, the bottom plate is provided with a second mounting hole, the second mounting hole is fixedly connected with the mounting bracket, and the second mounting hole is not intersected with the liquid cooling pipeline.

Preferably, the installing support interval is provided with protruding muscle, protruding muscle to battery monomer direction is protruding, battery monomer sets up between the protruding muscle.

Preferably, the mounting bracket is provided with glue injection grooves, the glue injection grooves are arranged between the raised ribs, glue is arranged in the glue injection grooves, and the number and the size of the glue injection grooves are matched with those of the single batteries.

Preferably, the mounting bracket is provided with reinforcing ribs at intervals, and the reinforcing ribs are protruded back to the direction of the battery monomer.

Preferably, the mounting bracket is provided with a fixing seat, and fixing hole positions are arranged on the fixing seat at intervals.

Preferably, the mounting bracket comprises a first mounting bracket and a second mounting bracket, end plates are arranged at two ends of the mounting bracket, and the end plates are used for connecting the first mounting bracket and the second mounting bracket.

Preferably, the end plate comprises a first end plate and a second end plate, the first end plate is provided with a boss, the second end plate is provided with a groove, and the height of the boss is matched with the depth of the groove.

Preferably, glue is arranged inside the groove.

Preferably, a heat conductive member is disposed between the battery module and the base plate.

The second aspect of the present disclosure provides an electric vehicle including the battery pack provided by the first aspect of the present disclosure.

The utility model provides a battery package and electric automobile, battery package include box, bottom plate and battery module, and battery module includes a plurality of battery monomer and installing support. The bottom plate is of a flat plate structure, and the liquid cooling pipeline is integrated, so that a liquid cooling system is omitted, the internal use space of the battery pack is saved, and the weight of the battery pack is reduced; the mounting bracket replaces a metal piece with a plastic piece, so that the manufacturing cost is saved.

Drawings

Fig. 1 is a schematic application diagram of an embodiment of the present application.

FIG. 2 is a schematic view of the bottom plate structure in FIG. 1

FIG. 3 is an enlarged view of a portion of the liquid cooling ducts in the base plate of FIG. 2

FIG. 4 is a partial enlarged view of the second base plate of FIG. 2

FIG. 5 is an exploded view of the battery module of FIG. 1

FIG. 6 is a schematic view of the mounting bracket of FIG. 1

Description of the reference numerals

Base plate 2 of box 1

First base plate 21 and second base plate 22

Slotted 221 liquid cooling conduit 23

Liquid inlet structure 24 and liquid outlet structure 25

First mounting hole 27 of connector 26

Second mounting hole 28 for battery module 3

Battery pack 31 battery cell 311

Mounting bracket 32 first mounting bracket 32A

Second mounting bracket 32B raised rib 321

Glue injection groove 322 reinforcing rib 323

Fixing hole 325 of fixing seat 324

End plate 326 first end plate 3261

Second end plate 3262 boss 327

Groove 328

Detailed Description

The conception and the resulting technical effects of the present disclosure will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive efforts based on the embodiments of the present disclosure belong to the protection scope of the present disclosure.

In the description of the embodiments of the present disclosure, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present disclosure and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

In the description of the embodiments of the present disclosure, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" to another feature, it may be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, connected, or mounted to the other feature. In the description of the embodiments of the present disclosure, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than", or "more than", it is understood that the number is not included, and if "more than", "less than", or "within", it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

In the description of the embodiments of the present disclosure, in order to facilitate the technical solution understood by those skilled in the art, a coordinate system XYZ is introduced, where a coordinate axis X represents a left-right direction of the battery pack, a coordinate axis Y represents a front-back direction of the battery pack, and a coordinate axis Z represents an up-down (height) direction of the battery pack, which will be described later.

As shown in fig. 1 to 4, a first aspect of the present disclosure provides a battery pack, which includes a case 1, a bottom plate 2 and a battery module 3, wherein the battery module 3 is mounted on the bottom plate 2, the case 1 is fastened on the battery module 3 and is fixedly connected to the bottom plate 2, and the height of the case 1 matches with the height of the battery module 3.

The base plate 2 includes a first base plate 21 and a second base plate 22, and the second base plate 22 is fixed to an outer side of the first base plate 21 by welding. The side of the first bottom plate 21 connected to the second bottom plate 22 is open, and the side of the first bottom plate not connected to the second bottom plate 22 is closed. The upper surface of the second bottom plate 22 is provided with an opening (not shown in the figure), the liquid inlet structure 24 and the liquid outlet structure 25 are fixed at the opening on the upper surface in a welding mode, the number of the liquid inlet structure 24 and the liquid outlet structure 25 is at least one, and the size and the number of the opening are matched with the size and the number of the liquid inlet structure 24 and the liquid outlet structure 25. The bottom plate 2 is of a flat plate structure and the liquid cooling pipeline 23 is integrated inside, the integrated bottom plate 2 can reduce the complexity of battery pack assembly, the utilization rate of the internal space of the battery pack is improved, the battery pack is easy to process, and the manufacturing cost of the battery pack can be reduced.

The liquid cooling pipeline 23 in the bottom plate 2 meets the strength requirement of the bottom plate 2, and simultaneously needs to cover the whole bottom plate 2 as much as possible so as to improve the heat dissipation efficiency of the battery pack. The liquid cooling pipeline 23 is communicated with the liquid inlet structure 24 and the liquid outlet structure 25, and various arrangement forms such as a straight pipeline, a U-shaped pipeline, an M-shaped pipeline and an S-shaped pipeline can be presented in the bottom plate 2. The left and right ports of the liquid cooling pipeline 23 in the first base plate 21 are respectively communicated with the second base plate 22, the side surface of the second base plate 22 is provided with a notch 221, and the notch 221 is communicated with the liquid inlet structure 24 and the liquid cooling pipeline 23, the liquid outlet structure 25 and the liquid cooling pipeline 23 and the adjacent liquid cooling pipeline 23.

In one embodiment of the present disclosure, the upper surface of the second bottom plate 22 is provided with a liquid inlet structure 24 and a liquid outlet structure 25, the liquid inlet structure 24 on the second bottom plate 22 on one side and the liquid outlet structure 25 on the second bottom plate 22 on the other side are correspondingly grouped, the liquid cooling pipeline 23 communicates the liquid inlet structure 24 and the liquid outlet structure 25, and a straight pipeline is present inside the bottom plate 2.

When the cooling performance of the bottom plate 2 needs to be improved, the number of the liquid inlet structure 24, the liquid outlet structure 25 and the liquid cooling pipeline 23 on the second bottom plate 22 can be increased. In another embodiment of the present disclosure, as shown in fig. 2, according to the distribution of the battery modules 3 on the bottom plate 2, 4 liquid inlet structures 24 and 4 liquid outlet structures 25 are arranged at intervals on the upper surface of the second bottom plate 22, the liquid inlet structures 24 and the liquid outlet structures 25 on different sides are in one-to-one correspondence and form four groups, the liquid cooling pipelines 23 communicate the liquid inlet structures 24 and the liquid outlet structures 25, and four groups of straight pipelines are present inside the bottom plate 2. The straight pipeline is simple in arrangement form and easy to process, and liquid flow directions among adjacent straight pipelines are different, so that the temperature inside the battery pack is uniformly distributed, and the heat dissipation efficiency is improved.

In another embodiment of the present disclosure, the left second bottom plate 22 is provided with an inlet structure 24 and an outlet structure 25, the side of the right second bottom plate 22 is provided with a slot 221, one side of the liquid cooling pipeline 23 is communicated with the inlet structure 24 and the outlet structure 25, the other side is communicated with the slot 221, and a U-shaped pipeline is formed inside the bottom plate 2. Similarly, the liquid inlet structure 24 and the liquid outlet structure 25 may be disposed on the second bottom plate 22 on the right side, the slot 221 is disposed on the side surface of the second bottom plate 22 on the left side, one side of the liquid cooling pipeline 23 is communicated with the liquid inlet structure 24 and the liquid outlet structure 25, the other side is communicated with the slot 221, and a U-shaped pipeline is disposed inside the bottom plate 2.

In another embodiment of the present disclosure, the left second bottom plate 22 is provided with an inlet structure 24 and an outlet structure 25, the side of the left second bottom plate 22 is provided with a slot 221, the slot 221 is located between the inlet structure 24 and the outlet structure 25, the side of the right second bottom plate 22 is provided with two slots 221, the liquid cooling pipeline 23 is sequentially connected to the inlet structure 24, the slot 221 on the right second bottom plate 22, the slot 221 on the left second bottom plate 22, the other slot 221 on the right second bottom plate 22, and the outlet structure 25, so that the liquid cooling pipeline 23 forms an "M" -shaped cooling system inside the bottom plate 2. Similarly, two slots 221 may be provided on the left second bottom plate, and the liquid inlet structure 24, the liquid outlet structure 25 and one slot 221 are provided on the right second bottom plate 22, and are connected through the liquid cooling pipe 23 to form the cooling system in which the liquid cooling pipe 23 is in an "M" shape inside the bottom plate 2.

In another embodiment of the present disclosure, a liquid inlet structure 24 is disposed on the left-side second bottom plate 22, a liquid outlet structure 25 is disposed on the right-side second bottom plate 22, the liquid inlet structure 24 and the liquid outlet structure 25 are disposed at opposite corners of the bottom plate 2, the liquid cooling pipes 23 are arranged in an "S" shape on the first bottom plate 21, and the liquid cooling pipes 23 connect the liquid inlet structure 24 and the liquid outlet structure 25 to form a cooling system.

The bottom plate 2 is provided with connecting pieces 26 protruding outwards, the connecting pieces 26 are provided with hole positions at intervals and used for being connected with a vehicle body, and the size and the style of the connecting pieces 26 are specifically designed according to the hole positions and the bottom plate 2. The connecting member 26 may be integrally formed with the base plate 2, or may be fixedly connected to the base plate 2 by welding or bolts. In an embodiment of the present disclosure, as shown in fig. 1 and 2, a connecting member 26 is disposed on an outer side of the first bottom plate 21, and the connecting member 26 is integrally formed with the first bottom plate 21 and has an arc transition. The first bottom plate 21 and the connecting piece 26 are both of flat plate structures and have the same thickness, so that the processing is easy, and the cost is saved.

The outer edge of the bottom plate 2 is uniformly provided with first mounting holes 27, and the first mounting holes 27 are used for being fixedly connected with the box body 1 and matched with the hole positions of the box body 1. A second mounting hole 28 is disposed in the bottom plate 2, and the second mounting hole 28 is used for fixedly connecting with a mounting bracket 32. The first mounting hole 27 and the second mounting hole 28 do not intersect with the liquid cooling pipe 23, and the strength requirements of the first mounting hole 27 and the second mounting hole 28 are met.

The battery module 3 comprises a battery pack 31 and a mounting bracket 32, wherein the battery pack 31 is composed of a plurality of battery monomers 311, and the mounting bracket 32 is arranged around the outside of the battery pack 31 and is mounted on the bottom plate 2. The mounting bracket 32 is a plastic part, and replaces a metal part in the prior art, so that the insulation problem of the battery module 3 can be effectively solved, the weight of the battery module 3 can be reduced, and the use cost can be reduced. The mounting bracket 32 is provided with protruding ribs 321 at intervals, the protruding ribs 321 protrude toward the battery cells 311, the battery cells 311 are disposed between the protruding ribs 321, and the protruding ribs 321 are used for limiting the displacement of the battery cells 311 in the stacking direction of the battery cells 311. Be provided with injecting glue groove 322 between protruding muscle 321, the inside glue that sets up of injecting glue groove 322 bonds battery monomer 311 and installing support 32. The mounting bracket 32 is provided with ribs 323 at intervals, the ribs 323 protrude away from the battery cells 311, and the ribs 323 reinforce the strength of the mounting bracket 32. The mounting bracket 32 is provided with a fixing seat 324, fixing hole positions 325 are arranged on the fixing seat 324 at intervals, the fixing hole positions 325 are matched with the second mounting hole 28, and the fastener passes through the fixing hole positions 325 and the second mounting hole 28 in sequence to connect the mounting bracket 32 and the bottom plate 2.

The mounting bracket 32 includes a first mounting bracket 32A and a second mounting bracket 32B, end plates 326 are disposed at two ends of the mounting bracket 32, each end plate 326 includes a first end plate 3261 and a second end plate 3262, and the end plates 326 can be connected to the first mounting bracket 32A and the second mounting bracket 32B by means of bolt fastening, gluing and the like.

In one embodiment of the present disclosure, as shown in fig. 5 and 6, the first end plate 3261 of the first mounting bracket 32A is located on the left of the first mounting bracket 32A, the second end plate 3262 is located on the right of the first mounting bracket 32A, and the first mounting bracket 32A and the second mounting bracket 32B are the same structure, i.e., the first end plate 3261 of the second mounting bracket 32B is located on the right of the second mounting bracket 32B, and the second end plate 3262 is located on the left of the second mounting bracket 32B, and the mounting brackets 32 with the same structure can save the manufacturing cost. The first end plate 3261 is provided with a boss 327, the second end plate 3262 is provided with a groove 328, and the height of the boss 327 matches with the depth of the groove 328. Glue may be disposed within the recess 328 to connect the first mounting bracket 32A and the second mounting bracket 32B by the engagement of the boss 327 with the recess 328.

A heat-conducting member (not shown) having a high heat conductivity is provided between the battery module 3 and the base plate 2, and the heat transfer efficiency between the battery module 3 and the base plate 2 can be improved.

A second aspect of the present disclosure provides an electric vehicle including the above battery pack.

The embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, but the present disclosure is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present disclosure. Furthermore, the embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict.

Claims

1. A battery pack, comprising: the battery box comprises a box body, a bottom plate and a battery module, wherein the box body is buckled on the battery module and is fixedly connected with the bottom plate; the battery module comprises a battery pack and a mounting bracket, the battery pack comprises a plurality of battery monomers, the mounting bracket is a plastic part, and the mounting bracket is arranged on the battery pack in a surrounding manner; the bottom plate is provided with a liquid cooling pipeline, and the liquid cooling pipeline is used for cooling the battery module.

2. The battery pack according to claim 1, wherein the bottom plate comprises a first bottom plate and a second bottom plate, the second bottom plate is disposed outside the first bottom plate, the second bottom plate is provided with a liquid inlet structure and a liquid outlet structure, and the liquid cooling pipeline is communicated with the liquid inlet structure and the liquid outlet structure.

3. The battery pack according to claim 2, wherein the number of the liquid inlet structures and the liquid outlet structures is at least one.

4. The battery pack according to claim 1, wherein the base plate is provided with a coupling member protruding outward, the coupling member being provided with a hole site for coupling with a vehicle body.

5. The battery pack of claim 1, wherein the outer edges of the bottom plates are uniformly provided with first mounting holes, the first mounting holes are fixedly connected with the box body, and the first mounting holes are not intersected with the liquid cooling pipeline.

6. The battery pack of claim 1, wherein the base plate is provided with a second mounting hole, the second mounting hole is fixedly connected with the mounting bracket, and the second mounting hole does not intersect with the liquid cooling pipeline.

7. The battery pack of claim 1, wherein the mounting brackets are provided with protruding ribs at intervals, the protruding ribs protrude toward the battery cells, and the battery cells are arranged between the protruding ribs.

8. The battery pack according to claim 7, wherein the mounting bracket is provided with glue injection grooves, the glue injection grooves are arranged between the raised ribs, glue is arranged in the glue injection grooves, and the number and the size of the glue injection grooves are matched with those of the single batteries.

9. The battery pack of claim 1, wherein the mounting brackets are spaced apart by ribs projecting away from the battery cells.

10. The battery pack of claim 1, wherein the mounting bracket is provided with fixing seats, and the fixing seats are provided with fixing hole positions at intervals.

11. The battery pack of claim 1, wherein the mounting bracket comprises a first mounting bracket and a second mounting bracket, and end plates are disposed at two ends of the mounting bracket and used for connecting the first mounting bracket and the second mounting bracket.

12. The battery pack of claim 11, wherein the end plates comprise a first end plate and a second end plate, the first end plate being provided with a boss and the second end plate being provided with a recess, the height of the boss matching the depth of the recess.

13. The battery pack of claim 12, wherein the groove is internally provided with glue.

14. The battery pack of claim 1, wherein a thermally conductive member is disposed between the battery module and the base plate.

15. An electric vehicle comprising the battery pack of any one of claims 1-14.