CN217444497U - Lower box body of battery pack - Google Patents
Lower box body of battery pack Download PDFInfo
- Publication number
- CN217444497U CN217444497U CN202220941817.9U CN202220941817U CN217444497U CN 217444497 U CN217444497 U CN 217444497U CN 202220941817 U CN202220941817 U CN 202220941817U CN 217444497 U CN217444497 U CN 217444497U
- Authority
- CN
- China
- Prior art keywords
- battery pack
- box body
- lower box
- cover plate
- bottom plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Battery Mounting, Suspending (AREA)
Abstract
The application provides a battery pack lower box body, which comprises a bottom plate, a cover plate, folding staggered-tooth fins and a cross beam. The bottom plate is characterized by a runner cavity, a reinforcing beam, a waist-shaped support and a round hole which are punched by a die, and a nut is riveted; riveting a positioning gasket on the top plate; the folded staggered-tooth fins are placed in the closed cavity formed by buckling the bottom plate and the top plate, so that the cooling liquid flows uniformly and the overall rigidity and strength of the lower box body are enhanced; the cross beam is fixed on the upper surface of the cover plate and used for mounting the battery pack. The utility model provides a box constitutes a whole that possesses good rigidity through linking bottom plate, apron, folding staggered teeth fin and crossbeam together, can effectively bear the impact load who comes from battery package and outside and guarantee structural strength and the rigidity of box down. The folded staggered-tooth fins can change the flow rate and the distribution characteristics of the fluid in the cavity of the box body, so that the temperature distribution of the box body and the battery is more uniform, and the heat management effect of the battery pack is further improved.
Description
Technical Field
The application relates to the field of power batteries, in particular to a lower box body of a battery pack.
Background
With the rapid development of electric vehicles and energy storage industries and the orderly promotion of the targets of carbon neutralization and carbon peak reaching, the demand and performance of power batteries are continuously improved. As a core component of the electric automobile and energy storage industry, the safety, the cruising ability and the charging efficiency of a power battery system directly influence the overall performance and the service life of the electric automobile and the energy storage system.
The box body of the power battery in the prior art is generally composed of a lower box body and an upper cover, and the lower box body is generally composed of a sheet metal part, a profile aluminum extruded part or an aluminum casting part. For the liquid-cooled battery pack, the structural forms of the lower box body and the liquid-cooled plate are independent and integrated.
Lower box and the independent structural style of cold drawing, it is usually that the cold drawing is placed in box down, and the box is used for bearing most weight of battery package, and the cold drawing is then used for cooling down or heating power battery, and this kind of mode processing degree of difficulty is low but whole package weight is big to there is the risk that coolant liquid reveals in the excessive inside coolant liquid interface.
The integrated mode of box and cold drawing down then is a spare part with cold drawing and lower box integration, avoids the coolant liquid to reveal inside the battery package box, and structural style generally has two kinds: the cold plate is welded on the bottom surface of the lower box body or the lower box body is directly used as the cold plate. The mode that the cold plate is welded on the bottom surface of the lower box body can cause larger welding processing amount, and the heat exchange efficiency of the cold plate and the battery cell is reduced due to the increase of the thermal resistance of the lower box body, so that the heat management of the battery pack is not facilitated; the mode that the lower box body is used as the cold plate usually causes that the structural strength and the rigidity of the cold plate are lower, the capacity of resisting external impact is weaker, and the cost is increased sharply when the structural strength and the rigidity are improved.
SUMMERY OF THE UTILITY MODEL
The technical problem that this application will solve is: the lower box body of the battery pack with good heat dissipation capacity, bearing capacity and impact resistance is provided, and the problems and the defects that the strength and the rigidity of the whole structure are weak and the heat exchange efficiency is low when the lower box body of the battery pack and a cold plate are integrated in the prior art are overcome.
The utility model provides a lower box body of a battery pack, which comprises a bottom plate, a cover plate, a liquid inlet joint, a liquid outlet joint and a cross beam; the bottom plate and the cover plate are buckled to form a closed flow passage cavity; the liquid inlet joint and the liquid outlet joint are arranged on the cover plate and are communicated with the flow passage cavity; the battery pack lower box body further comprises: folding the staggered-tooth fins; the folded staggered-tooth fins are arranged in the flow channel cavity; the top of the folding staggered-tooth fin is fixedly connected with the cover plate, and the bottom of the folding staggered-tooth fin is fixedly connected with the bottom plate; the crossbeam is connected with the upper surface of apron for install the battery package.
Preferably, the base plate includes: the battery pack comprises a reinforcing beam, a waist-shaped support and a plurality of first round holes, wherein the plurality of first round holes are used for pressing and riveting nuts, and an upper cover of the battery pack is fixed in a mode that screws are screwed into the nuts;
the waist-shaped supports are arranged on two sides of the bottom plate and are in contact with the automobile chassis or the steel beam of the cabinet body to support the whole battery pack.
Preferably, the reinforcing beam includes: the front side reinforcing beam and the rear side reinforcing beam are used for improving the structural strength and rigidity of the bottom plate; respectively arranged at the front side and the rear side of the bottom plate.
Preferably, the bottom plate is stamped with a die to form the runner cavity, the front reinforcing beam, the rear reinforcing beam, the waist-shaped support and the first round hole.
Preferably, the base plate further comprises: and the longitudinal beams extend inside the runner cavity and are used for dividing the runner cavity.
Preferably, the cover plate includes: a second circular aperture and a third circular aperture; the second round hole is communicated with the liquid inlet joint and used for allowing cooling liquid to enter the flow channel cavity; the third round hole is communicated with the liquid outlet joint and used for discharging the cooling liquid out of the cavity of the flow passage.
Preferably, the cover plate includes: and the fourth round holes are used for riveting the positioning gaskets in a pressing manner and are used for positioning the box body sealing ring and limiting the compression amount of the box body sealing ring.
Preferably, the cross member includes: the front cross beam and the rear cross beam are arranged oppositely, connected with the upper surface of the cover plate and used for installing the battery pack.
Preferably, the front cross member and the rear cross member have the same structure, are fastened to the cover plate, and are used to fix the battery module or the battery pack in a manner of embedding the screw sleeves into the aluminum bars, and simultaneously, are used to reinforce the overall structural strength and rigidity of the lower case.
Preferably, the bottom plate, the cover plate, the folded staggered-tooth fins and the cross beam form a whole in a brazing mode.
Compared with the prior art, the battery pack lower box body provided by the application has the advantages that the folding staggered-tooth fins are placed in the runner cavity of the bottom plate and the cover plate after being buckled by adopting the lower box body and cold plate integrated structural form, the safety risk caused by the fact that cooling liquid is leaked to the inside of the battery pack can be reduced, the overall structural strength and rigidity of the lower box body and the battery pack can be improved, the flow speed and the flow resistance of fluid in the runner cavity can be changed, the temperature distribution of the box body is more uniform, and the heat management effect of the battery pack is improved.
Drawings
Fig. 1 is a schematic structural diagram of a lower box of a battery pack provided by the present application;
FIG. 2 is a schematic view of the structure of the base plate shown in FIG. 1;
FIG. 3 is a schematic view of the cover plate shown in FIG. 1;
FIG. 4 is a schematic view of the cross-toothed rule fin of FIG. 1;
FIG. 5 is a schematic structural view of the beam shown in FIG. 1;
FIG. 6 is a partial sectional view taken along line A-A of FIG. 1;
in the figure:
10-bottom plate, 101-runner cavity, 102-front side reinforcing beam, 103-waist-shaped support, 104-first round hole, 105-nut, 106-longitudinal beam, 107-rear side reinforcing beam;
20-cover plate, 201-second round hole, 202-third round hole, 203-fourth round hole, 204-positioning gasket;
30-folding the staggered fins;
40-liquid inlet joint;
50-liquid outlet joint;
60-a front cross beam;
70-rear cross member.
Detailed Description
The preferred embodiments of the present application will now be described with reference to the accompanying drawings, and it is to be understood that the preferred embodiments described herein are merely illustrative and explanatory of the disclosure, and are not restrictive thereof.
As shown in fig. 1, an embodiment of the present application provides a battery pack lower case. The lower box body of the battery pack is composed of a bottom plate 10, a cover plate 20, a folding dislocation fin 30, a liquid inlet joint 40, a liquid outlet joint 50, a front cross beam 60 and a rear cross beam 70.
As shown in fig. 2, the bottom plate 10 is stamped with a die to form a runner cavity 101, a front reinforcing beam 102, a rear reinforcing beam 107, a waist bracket 103, and a first circular hole 104. After the runner cavity 101 is punched out of the bottom plate 10, longitudinal beams 106 are formed to divide the runner cavity 101; the front reinforcing beam 102 and the rear reinforcing beam 107 are used to improve the structural strength and rigidity of the floor; a plurality of waist-shaped supports 103 on two sides of the bottom plate are in contact with steel beams of an automobile chassis or a cabinet body to support the whole battery pack; the first round holes 104 are used for pressing and riveting nuts 105, and the battery pack upper cover is fixed by screwing screws into the nuts.
As shown in fig. 3, the cover plate 20 is stamped with a die to form a second circular hole 201, a third circular hole 202 and a plurality of fourth circular holes 203. The second round hole 201 is communicated with the liquid inlet joint 40 and is used for allowing cooling liquid to enter a closed flow channel cavity 101 formed by buckling a bottom plate and a cover plate; the third round hole 202 is communicated with the liquid outlet joint 50 and is used for discharging the cooling liquid out of the runner cavity 101; the fourth round holes 203 are used for riveting positioning gaskets 204, and are used for positioning the box body sealing ring and limiting the compression amount of the box body sealing ring.
As shown in fig. 4, the folded staggered fins are formed by stamping with a die, the top and bottom of the folded staggered fins are welded with the cover plate 20 and the bottom plate 10 respectively to enhance the overall strength and rigidity of the lower box body, and the staggered fins at intervals between the front and the back divide and disturb the flow channels so that the cooling liquid flows more uniformly in the cavity 101.
As shown in fig. 5, the front cross member 60 and the rear cross member 70 are identical in structure, are fastened to the cover plate 20, and are used to fix the battery module or the battery pack in the form of a screw-insert aluminum bar, and at the same time, to reinforce the overall structural strength and rigidity of the lower case.
As shown in fig. 6, after the bottom plate 10 and the cover plate 20 are fastened and soldered, a closed cavity, i.e., a runner cavity 101, is formed; the folded staggered fins are placed in the runner cavity 101 and welded with the bottom plate 10 and the cover plate 20 together; the nut 105 is riveted on the base plate 10; the positioning gasket 203 is riveted on the cover plate 20; the cross member 60 is fastened to the cover plate 20; the base plate 10 is stamped out of the kidney-shaped support 103 with a die.
It should be noted that the present invention is only a preferred but non-limiting embodiment of the present invention, and those skilled in the art can use other processes to obtain the same or equivalent structures, and the concept is within the scope of the present invention.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Finally, it should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention as defined in the appended claims. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A lower box body of a battery pack comprises a bottom plate (10), a cover plate (20), a liquid inlet joint (40), a liquid outlet joint (50) and a cross beam; the method is characterized in that:
the bottom plate (10) and the cover plate (20) are buckled to form a closed runner cavity (101); the liquid inlet joint (40) and the liquid outlet joint (50) are arranged on the cover plate (20) and are communicated with the flow channel cavity (101);
the battery pack lower box body further comprises: folding staggered-tooth fins (30); the folded staggered-tooth fins (30) are arranged in the runner cavity (101); the top of the folding staggered-tooth fin (30) is fixedly connected with the cover plate (20), and the bottom of the folding staggered-tooth fin is fixedly connected with the bottom plate (10);
the cross beam is connected with the upper surface of the cover plate (20) and used for installing the battery pack.
2. The lower box body of the battery pack according to claim 1, characterized in that:
the base plate (10) comprises: the battery pack comprises a reinforcing beam, a waist-shaped support (103) and first round holes (104), wherein the first round holes (104) are used for pressing and riveting nuts (105), and an upper cover of the battery pack is fixed in a mode that screws are screwed into the nuts;
the waist-shaped supports (103) are arranged on two sides of the bottom plate (10) and are in contact with a steel beam of an automobile chassis or a cabinet body to support the whole battery pack.
3. The lower box body of the battery pack as claimed in claim 2, wherein:
the reinforcing beam includes: a front side reinforcing beam (102) and a rear side reinforcing beam (107) for improving the structural strength and rigidity of the floor; are respectively arranged on the front side and the rear side of the bottom plate (10).
4. The lower box body of the battery pack as claimed in claim 3, wherein:
the bottom plate (10) is stamped with a runner cavity (101), a front reinforcing beam (102), a rear reinforcing beam (107), a waist-shaped support (103) and a first round hole (104) by a die.
5. The lower box body of the battery pack according to claim 1, characterized in that:
the base plate (10) further comprises: and longitudinal beams (106) extending inside the flow channel cavity (101) and dividing the flow channel cavity (101).
6. The lower box body of the battery pack as claimed in claim 1, wherein:
the cover plate (20) includes: a second circular hole (201) and a third circular hole (202); the second round hole (201) is communicated with the liquid inlet joint (40) and is used for allowing cooling liquid to enter the runner cavity (101); the third round hole (202) is communicated with the liquid outlet joint (50) and is used for discharging the cooling liquid out of the runner cavity (101).
7. The lower case for battery packs as claimed in claim 1 or 6, wherein:
the cover plate (20) includes: and the fourth round holes (203) are used for riveting positioning gaskets (204) in a pressing mode and used for positioning the box body sealing ring and limiting the compression amount of the box body sealing ring.
8. The lower box body of the battery pack as claimed in claim 1, wherein:
the crossbeam includes: the battery pack is characterized by comprising a front cross beam (60) and a rear cross beam (70), wherein the front cross beam (60) and the rear cross beam (70) are oppositely arranged and connected with the upper surface of the cover plate (20) for mounting the battery pack.
9. The lower box body of the battery pack as claimed in claim 8, wherein:
the front cross beam (60) and the rear cross beam (70) are identical in structure, fastened on the cover plate (20) and embedded into the aluminum strip through threaded sleeves to fix the battery module or the battery pack, and used for enhancing the overall structural strength and rigidity of the lower box body.
10. The lower box body of the battery pack as claimed in claim 1, wherein:
the bottom plate (10), the cover plate (20), the folded staggered-tooth fins (30) and the cross beam form a whole in a brazing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220941817.9U CN217444497U (en) | 2022-04-22 | 2022-04-22 | Lower box body of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220941817.9U CN217444497U (en) | 2022-04-22 | 2022-04-22 | Lower box body of battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217444497U true CN217444497U (en) | 2022-09-16 |
Family
ID=83216956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220941817.9U Active CN217444497U (en) | 2022-04-22 | 2022-04-22 | Lower box body of battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217444497U (en) |
-
2022
- 2022-04-22 CN CN202220941817.9U patent/CN217444497U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3654405A1 (en) | Casing for battery pack and battery pack | |
| US20210226279A1 (en) | Thermal systems for battery electric vehicles | |
| WO2022053487A1 (en) | Cooling device for power battery system and power battery system for vehicle | |
| CN217788522U (en) | Battery cooling system, battery pack and vehicle | |
| US20210391618A1 (en) | Battery pack box and battery pack | |
| KR102462632B1 (en) | Cooling plate of battery pack | |
| CN217444497U (en) | Lower box body of battery pack | |
| EP3654443A1 (en) | Casing for battery pack and battery pack | |
| US10383262B2 (en) | Power conversion device | |
| CN211238324U (en) | Battery box structure and power battery pack | |
| CN210040347U (en) | Battery module and power battery | |
| CN217848127U (en) | Battery pack and power device | |
| CN216529038U (en) | Liquid cooling board, battery package tray and have its battery package | |
| CN110994069A (en) | Air-cooled heat dissipation battery pack and vehicle | |
| CN213425065U (en) | External water-cooling plate structure of power battery package | |
| CN212848623U (en) | Battery package box, battery package and new forms of energy vehicle | |
| CN220290947U (en) | Lower box of battery pack | |
| CN114388967A (en) | Liquid-cooled battery tray and battery box | |
| CN114335795A (en) | Integrated battery assembly with double-layer module, electric vehicle and design method | |
| CN219553728U (en) | Lightweight double-deck board liquid cooling battery box | |
| CN219677399U (en) | Battery pack box, battery pack and vehicle | |
| CN113644368A (en) | Battery box body for battery pack and battery pack | |
| CN219303839U (en) | Battery pack box, battery pack and vehicle | |
| CN219497990U (en) | Integrated box, power battery pack assembly and vehicle | |
| CN218300052U (en) | Lower box structure, power battery and electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221108 Address after: 211102 No.69, Suyuan Avenue, Jiangning Economic and Technological Development Zone, Nanjing City, Jiangsu Province Patentee after: NR ELECTRIC Co.,Ltd. Patentee after: NR ENGINEERING Co.,Ltd. Patentee after: NR ELECTRIC POWER ELECTRONICS Co.,Ltd. Address before: 211102 No. 69, Suyuan Avenue, Jiangning Economic and Technological Development Zone, Jiangning District, Nanjing, Jiangsu Province Patentee before: NR ELECTRIC Co.,Ltd. Patentee before: NR ENGINEERING Co.,Ltd. |