阅读说明：本技术 一种轻型液冷电池箱体 (Light liquid-cooled battery box ) 是由 王晕 蒋利波 张明刚 蒋威威 顾飞 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种轻型液冷电池箱体,包括底板,前、后边框和左、右边框；所述前、后边框与底板一体成型,所述左、右边框与底板之间通过焊接或紧固件连接,从而减少焊接量,进一步减少焊接热输入量,减小箱体变形程度,保证箱体的尺寸精度。另外,左、右边框集成电池包吊装孔、整车安装孔及模组固定孔为一体,保证了箱体强度,且左、右边框设计台阶式结构与底板搭接,方便定位,减少零件数量与焊接量,提高电池包箱体尺寸的精度,减轻电池包重量。另外,本发明增加了堵块,减小边框受风冷影响,对电池进行保温,进一步提升电池包的保护性能,底部通过焊接集成液冷系统,并增加保温层,从而提供电池包内温度均一性,提高电池寿命。(The invention discloses a light liquid-cooling battery box body which comprises a bottom plate, a front frame, a rear frame, a left frame and a right frame, wherein the front frame is connected with the rear frame; preceding, back frame and bottom plate integrated into one piece, be connected through welding or fastener between left and right frame and the bottom plate to reduce the welding volume, further reduce welding heat input volume, reduce the box degree of deformation, guarantee the size precision of box. In addition, the left and right frames integrate the battery pack hoisting hole, the whole vehicle mounting hole and the module fixing hole into a whole, the strength of the box body is guaranteed, the stepped structure designed on the left and right frames is in lap joint with the bottom plate, the positioning is convenient, the number of parts and the welding amount are reduced, the precision of the size of the battery pack box body is improved, and the weight of the battery pack is reduced. In addition, the blocking block is added, the influence of air cooling on the frame is reduced, the heat preservation is carried out on the battery, the protection performance of the battery pack is further improved, the liquid cooling system is integrated at the bottom through welding, and the heat preservation layer is added, so that the temperature uniformity in the battery pack is improved, and the service life of the battery is prolonged.)

1. A light liquid-cooling battery box body comprises a bottom plate (1), a front frame, a rear frame (2), a left frame and a right frame (3); the method is characterized in that: the front and rear frames (2) and the bottom plate (1) are integrally formed, and the left and right frames (3) and the bottom plate (1) are connected through welding or fasteners.

2. The light-duty liquid-cooled battery box of claim 1, wherein: the lower parts of the left frame (3) and the right frame (3) are provided with step structures (4) which are used for being lapped with the bottom plate (1); the lap joints are connected by friction stir welding or sealant fastener.

3. The light-duty liquid-cooled battery box of claim 1 or 2, characterized in that: the lower part of bottom plate (1) is equipped with liquid cooling board (11), liquid cooling board (11) are 0.5 ~ 2 mm's punching press aluminum plate for thickness, are connected with bottom plate (1) through brazing or friction stir welding.

4. The light-duty liquid-cooled battery box of claim 3, wherein: the lower part of the liquid cooling plate (11) is also provided with a heat insulation layer (12), and the heat insulation layer (12) is made of polyurethane foam material.

5. The light-duty liquid-cooled battery box of claim 4, wherein: and a bottom guard plate (13) is further arranged below the heat-insulating layer (12), and the bottom guard plate (13) is fixed with the left frame (3) and the right frame (3) through screws.

6. The light-duty liquid-cooled battery box of claim 1 or 2, characterized in that: all be equipped with mounting panel (5) in die cavity (31) of left and right frame (3), be fixed in die cavity (31) inside of left and right frame (3) through welding or fastener between mounting panel (5) and left and right frame (3), be equipped with whole car mounting hole (51) and nut (7) that are used for whole car installation on mounting panel (5).

7. The light-duty liquid-cooled battery box of claim 1 or 2, characterized in that: and hoisting holes (8) are formed in the outer sides of the left frame and the right frame (3) and used for hoisting the integrated battery pack.

8. The light-duty liquid-cooled battery box of claim 1 or 2, characterized in that: the inboard of left and right frame (3) still is equipped with module mount table (9) that are used for supporting battery module, is equipped with module mounting hole (91) that are used for battery module on this module mount table (9).

9. The light-duty liquid-cooled battery box of claim 1, wherein: notches corresponding to the module mounting tables (9) are arranged on two sides of the front and rear frames (2).

10. The light-duty liquid-cooled battery box of claim 1, wherein: the light liquid-cooling battery box body further comprises a blocking block (6) which is used for blocking the cavities (31) at the two ends of the left frame (3) and the right frame (3) so as to reduce convection heat dissipation.

Technical Field

The invention relates to a light liquid-cooled battery box.

Background

At present, the peripheral frame and the bottom plate of the battery aluminum-clad box body are generally made of aluminum alloy extruded sections, the frame and the frame are in butt welding, and then the frame and the bottom plate are respectively in friction stir welding. However, the traditional whole bag splicing mode has large welding amount, and the welding causes large heat input amount, so that the deformation of the bag body is easily caused, and the dimensional precision of the box body is reduced; secondly, because the structure of battery package aluminium box is complicated, the frame mould that needs is many, not only needs to invest very big cost of manufacture, and the box weight of making is overweight moreover, and bottom liquid cooling circuit is low because of the designable flexibility of section bar extrusion, and the bottom of the box spraying PVC or do not insulate against heat and handle, cooling system is external heat radiation very big, leads to whole car energy consumption to be on the high side and battery package in battery life-span shorten.

Disclosure of Invention

Aiming at the existing problems, the invention provides a light liquid-cooling battery box body, wherein a front frame, a rear frame and a bottom plate are integrally formed, a left frame and a right frame are in lap joint with the bottom plate, the number of parts and the welding amount are reduced, and the weight of a battery pack is lightened, and the specific technical scheme is as follows:

a light liquid-cooled battery box comprises a bottom plate, a front frame, a rear frame, a left frame and a right frame; the front frame and the rear frame are integrally formed with the bottom plate, and the left frame and the right frame are connected with the bottom plate through welding or fasteners.

Preferably, the lower parts of the left and right frames are provided with step structures for being lapped with the bottom plate, and the lapped parts are connected through friction stir welding or sealant fastener.

Preferably, the lower part of the bottom plate of the light liquid-cooled battery box body is provided with a liquid-cooled plate, and the liquid-cooled plate is a stamped aluminum plate with the thickness of 0.5-2 mm and is connected with the bottom plate through brazing or friction stir welding.

Further preferably, the lower part of the liquid cooling plate is also provided with a heat insulation layer, and the heat insulation layer is made of polyurethane foam materials.

Preferably, a bottom guard plate is further arranged below the heat insulation layer and fixed with the left frame and the right frame through screws.

According to the light liquid-cooled battery box body, the mounting plates are arranged in the cavities of the left frame and the right frame, and the whole vehicle mounting holes and nuts for whole vehicle mounting are formed in the mounting plates.

Preferably, the mounting plate and the left and right frames are fixed in the cavities of the left and right frames by welding or fasteners.

According to the light liquid-cooled battery box, the outer sides of the left frame and the right frame are provided with the hoisting holes for hoisting the integrated battery pack.

According to the light liquid-cooled battery box, the module mounting platforms for supporting the battery modules are further arranged on the inner sides of the left and right frames, and module mounting holes for the battery modules are formed in the module mounting platforms.

In the light liquid-cooling battery box, the two sides of the front and rear frames are provided with notches corresponding to the module mounting table.

Preferably, aforementioned light-duty liquid cooling battery box still includes the sprue, and it is used for the die cavity mouth at shutoff left and right frame both ends, reduces the convection heat dissipation.

The invention has the beneficial effects that:

the front and rear frames of the light liquid-cooling battery box body and the bottom plate are integrally formed, so that the types of parts are reduced, and the welding amount is reduced. The left and right frames are integrated with the battery pack hoisting hole, the whole vehicle mounting hole and the module fixing hole into a whole, and are designed with stepped structures to be in lap joint with the bottom plate, so that the bottom plate and the side frame can be conveniently positioned; meanwhile, friction welding is carried out on the left side and the right side of the lap joint of the left frame and the right frame and the bottom plate, the number of parts and the welding amount are reduced, the welding input amount is small, the deformation of the box body is small, the precision of the size of the box body of the battery pack is improved, the weight of the battery pack is reduced, a liquid cooling loop can be flexibly designed, a foaming material with low heat conductivity is added for heat preservation, the weight of the box body can be effectively reduced, and the consistency of the temperature of the battery cell in the battery pack is ensured. In addition, the blocking block is added, the influence of air cooling on the frame is reduced, the heat of the battery is preserved, and the protection performance of the battery pack is further improved.

Drawings

FIG. 1 is an exploded view of the structure of the light liquid-cooled battery case of the present invention;

FIG. 2 is a partial structural diagram of the left and right frames of the present invention;

FIG. 3 is a schematic longitudinal sectional view of the left and right frames of the present invention;

FIG. 4 is a schematic cross-sectional view of the left and right frames of the present invention;

FIG. 5 is a schematic diagram of a liquid cooling plate structure according to the present invention;

FIG. 6 is a schematic view of an integrated structure of a liquid cooling plate substrate according to the present invention;

fig. 7 is a schematic view of an assembly structure of a battery module according to the present invention.

In the figure: 1. a base plate; 2. front and rear frames; 3. a left and right frame; 31. a cavity; 4. a step structure; 5. mounting a plate; 6. blocking; 7. a nut; 8. hoisting holes; 9. a module mounting table; 91. a module mounting hole; 11. a liquid-cooled plate; 12. a heat-insulating layer; 13. a bottom guard plate; 14. a water nozzle.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The specific embodiment is as follows:

a light liquid-cooled battery box body is shown in figures 1 to 7 and comprises a bottom plate 1, a front frame 2, a rear frame 2, a left frame 3 and a right frame 3; the front and rear frames 2 and the bottom plate 1 are integrally formed, and the left and right frames 3 and the bottom plate 1 are connected through welding or fasteners, so that the welding amount is reduced, the welding heat input amount is further reduced, the deformation degree of the box body is reduced, and the size precision of the box body is ensured.

In this embodiment, the specific implementation manner of the screw connection between the left and right frames 3 and the bottom plate 1 is as follows: left and right frame 3's lower part is equipped with stair structure 4 for with 1 overlap joint of bottom plate, the preferred friction stir welding or the sealed fastener of gluing of passing through of overlap joint is connected, reduces left and right frame 3 and 1 welding volume of bottom plate, and guarantees joint strength and goes, and left and right frame 3 passes through stair structure 4 and the 1 overlap joint of bottom plate that the lower part set up, makes things convenient for the location of bottom plate and frame when its installation, and guarantees the distance size of module mounting hole 9 on the left and right frame, improves follow-up installation accuracy.

In the light liquid-cooled battery box of the embodiment, the lower part of the bottom plate 1 is provided with the liquid-cooled plate 11, and the liquid-cooled plate 11 is connected with the bottom plate 1 through brazing or friction stir welding, so as to keep the temperature consistency of the battery core in the battery pack and prolong the service life of the battery. The cooling circuit of the liquid cooling plate 1 is arranged right below the battery module, and the serpentine design is adopted, so that the contact area of the cooling liquid and the plate body is increased, and the consistency of the temperature of the battery is ensured. A water nozzle hole is formed in the bottom plate 1, the water nozzle 14 is connected with the bottom plate 1 in a welding mode, and the liquid cooling plate 11 is brazed on the back face of the bottom plate 1, so that the liquid cooling plate 11 and the bottom plate 1 are integrated together. The bottom surface of the liquid cooling plate 11 is subjected to heat preservation treatment by using a polyurethane foaming molding material, so that the heat radiation loss is reduced. Still be equipped with end backplate 13 below heat preservation 12, end backplate 13 is preferably made for the punching press aluminum plate that thickness is 0.5 ~ 2mm, and it is together fixed through screw and left, right frame.

Secondly, this embodiment light-duty liquid cooling battery box, its left and right frame 3 reduces part quantity and welding volume through the integrated multiple functions of design, lightens battery package weight. First, the inner sides of the left and right frames 3 are also provided with a module mounting table 9 for supporting the battery module, and the module mounting table 9 is provided with a module mounting hole 91 for the battery module, so that the battery module is convenient to mount. The battery module is directly fixed in the module 9 departments of installing on left and right frame 3 through the stay bolt after putting into the case, and the whole stress point of box is all on the frame, and the frame intensity of aluminium alloy is good, can effectively guarantee intensity control weight, reduces bottom plate 1's pressure, guarantees battery module installation stability. The mounting plates 5 are arranged in the cavities 31 of the left and right frames 3, and the mounting plates 5 and the left and right frames 3 are fixed in the cavities 31 of the left and right frames 3 through welding or fasteners; be equipped with on the mounting panel 5 and be used for whole car mounting hole 51 and the nut 7 of whole car installation, directly install through its mounting panel 5 and nut 7 when whole car installation, can save the assembly function that other auxiliary component guarantee whole package of extra welding, alleviate battery package weight. Meanwhile, in the embodiment, the outer sides of the left and right frames 3 are provided with the hoisting holes 8 for hoisting the integrated battery pack, so that the traditional battery pack lifting lug function is replaced, and the weight of the battery pack is further reduced.

Correspondingly, in the embodiment, the two sides of the front and rear frames 2 are provided with the notches corresponding to the module mounting platforms 9, so that the left and right frames 3 and the front and rear frames 2 can be conveniently positioned and assembled when the battery pack tray is assembled. In addition, this embodiment light-duty liquid cooling battery box, still include sprue 6, its die cavity 31 mouth that is used for the 3 both ends of shutoff left and right frame reduces the influence that left and right frame 3 received the forced air cooling, keeps warm to the battery, promotes the protective properties of battery package.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.