CN210897431U

CN210897431U - Upper shell of battery pack and power battery pack

Info

Publication number: CN210897431U
Application number: CN201922457430.7U
Authority: CN
Inventors: 于福成; 王博文; 赵立志; 钱佳博; 梁玉杰; 陈许超; 范建宇; 孙立新; 杨聪; 王海东
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-06-30
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses an last casing and power battery package of battery package, the last casing of battery package includes: a housing body; the casing comprises a casing body, a reinforcing member, a plurality of electrophoresis liquid leakage holes, a plurality of electrophoresis liquid channels and a plurality of electrophoresis liquid leakage holes, wherein the casing body is provided with a plurality of electrophoresis liquid leakage holes, the electrophoresis liquid channels are defined between the reinforcing member and the casing body, and the electrophoresis liquid leakage holes are respectively communicated with the electrophoresis liquid channels. According to the utility model discloses an upper housing of battery package through linking to each other reinforcement and casing body, can improve casing body's structural strength. The electrophoresis leakage holes are formed in the reinforcing piece, and the electrophoresis liquid flow channel is limited between the reinforcing piece and the shell body, so that the electrophoresis area of the upper shell is increased, and the corrosion resistance of the upper shell is improved.

Description

Upper shell of battery pack and power battery pack

Technical Field

The utility model relates to a battery technology field particularly, relates to an last casing and power battery package of battery package.

Background

In the related art, the upper case of the battery pack is mostly made of an SMC composite material (namely, a Sheet molding compound, main raw materials of which include special yarns, fillers and various auxiliaries), but the battery pack for the PHEV (plug-in hybrid electric vehicle) has the disadvantages of small volume, high capacity, high cost and easy cracking of the upper case of the battery pack, and the cracking of the upper case of the battery pack during thermal runaway can harm the safety of passengers.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an upper casing of battery package, the structural strength of this upper casing of battery package is higher, the security is higher.

According to the utility model discloses the last casing of battery package of first aspect, include: a housing body; the casing comprises a casing body, a reinforcing member, a plurality of electrophoresis liquid leakage holes, a plurality of electrophoresis liquid channels and a plurality of electrophoresis liquid leakage holes, wherein the casing body is provided with a plurality of electrophoresis liquid leakage holes, the electrophoresis liquid channels are defined between the reinforcing member and the casing body, and the electrophoresis liquid leakage holes are respectively communicated with the electrophoresis liquid channels.

According to the utility model discloses an upper housing of battery package through linking to each other reinforcement and casing body, can improve casing body's structural strength. The electrophoresis leakage holes are formed in the reinforcing piece, and the electrophoresis liquid flow channel is limited between the reinforcing piece and the shell body, so that the electrophoresis area of the upper shell is increased, and the corrosion resistance of the upper shell is improved.

According to the utility model discloses an embodiment, the reinforcement is followed casing body extends to the left and right sides direction, just both ends respectively with casing body's the left and right sides corresponds the cooperation about the reinforcement.

According to the utility model discloses an optional example, be equipped with first protruding muscle and the protruding muscle of second on the reinforcement, on the left and right sides direction the length of first protruding muscle is greater than the length of the protruding muscle of second, first protruding muscle with the protruding muscle of second is in spaced apart arrangement in the fore-and-aft direction of reinforcement is a plurality of the electrophoresis weeping hole is established respectively first protruding muscle with on the protruding muscle of second.

According to another optional example of the present invention, the second ribs include two spaced apart in the left-right direction, and the reinforcing member is provided with a first mounting hole, and the first mounting hole is located between the two second ribs.

According to another optional example of the present invention, the housing body is provided with first reinforcing ribs extending in left and right directions, the first reinforcing ribs include two sets symmetrically arranged in the left and right directions of the housing body, and each set of the first reinforcing ribs includes a plurality of reinforcing ribs arranged in front and rear directions at intervals.

Furthermore, a hydrophobic groove is defined between every two adjacent first reinforcing ribs in the front-back direction, and the electrophoresis liquid flow channel is communicated with the hydrophobic groove.

According to the utility model discloses still another optional example, still be equipped with the second strengthening rib on the casing body, the second strengthening rib extends and link up along the fore-and-aft direction both ends around the casing body, the left and right sides of second strengthening rib respectively with correspond a plurality of group first strengthening rib polyphone.

Further, the first reinforcing bead and the second reinforcing bead are both formed as fishbone-shaped reinforcing beads.

Optionally, the reinforcing member is formed substantially in a C shape, and the outer periphery of the housing body is provided with a flange bent substantially at a right angle, and the flange is provided with a positioning fitting hole and a fixing connection hole.

According to the utility model discloses power battery package of second aspect includes: according to the upper shell, the lower shell and the battery cell module of the battery pack in the above embodiment, the flange of the upper shell is connected with the outer periphery of the lower shell in a matching manner, the upper shell and the lower shell define a mounting cavity together, and the battery cell module is arranged in the mounting cavity.

According to the utility model discloses a power battery package, through linking to each other reinforcement and casing body, can improve casing body's structural strength. The electrophoresis leakage holes are formed in the reinforcing piece, and the electrophoresis liquid flow channel is limited between the reinforcing piece and the shell body, so that the electrophoresis area of the upper shell is increased, and the corrosion resistance of the upper shell is improved.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a perspective view of an upper case of a battery pack according to an embodiment of the present invention;

fig. 2 is a perspective view of a reinforcement according to an embodiment of the present invention;

fig. 3 is a perspective view of the housing body according to the embodiment of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 3;

fig. 6 is a top view of an upper housing of a battery pack according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

fig. 8 is an enlarged view of a portion D in fig. 7.

Description of reference numerals:

the upper case 100 is provided with a plurality of,

the shell body 10, the first reinforcing rib 11, the drainage groove 12, the second reinforcing rib 13, the flanging 14, the positioning assembly hole 141, the fixing connection hole 142, the arc-shaped sealing surface 143, the identification part 15, the U-shaped reinforcing rib 16, the rectangular reinforcing rib 17,

the electrophoresis drain hole 21, the first rib 22, the second rib 23, the first mounting hole 24, the second mounting hole 25.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The upper case 100 of the battery pack according to the embodiment of the first aspect of the present invention is specifically described below with reference to fig. 1 to 8.

As shown in fig. 1, an upper case 100 of a battery pack according to an embodiment of the present invention includes a case body 10 and a reinforcement 20. Wherein, the reinforcing member 20 is connected to the casing body 10, for example, the reinforcing member 20 is fitted on the outer surface of the casing body 10, which can improve the structural strength of the casing body 10 and avoid the casing body 10 from cracking due to weak structural strength.

Further, a plurality of electrophoresis liquid leakage holes 21 are formed in the reinforcing member 20, an electrophoresis liquid flow channel is defined between the reinforcing member 20 and the casing body 10, and the plurality of electrophoresis liquid leakage holes 21 are respectively communicated with the electrophoresis liquid flow channel. It is understood that the electrophoretic fluid may enter the electrophoretic fluid flow path through the electrophoretic fluid leakage hole 21 and then flow out from the gap between the reinforcing member 20 and the case body 10. Thus, the electrophoresis area of the upper case 100 is increased, thereby ensuring the electrophoresis quality of the upper case 100 and improving the corrosion resistance of the upper case 100.

According to the utility model discloses last casing 100 of battery package, through linking to each other reinforcement 20 and casing body 10, can improve casing body 10's structural strength. The plurality of electrophoresis liquid leakage holes 21 are formed in the reinforcing member 20, and an electrophoresis liquid flow channel is defined between the reinforcing member 20 and the shell body 10, so that the electrophoresis area of the upper shell 100 is increased, the corrosion resistance of the upper shell 100 is improved, and the safety of the battery pack is improved.

Optionally, the housing body 10 is formed as a sheet metal part, which not only improves structural strength, but also reduces production cost.

Optionally, the reinforcing member 20 is welded to the housing body 10, and the connection is more reliable.

As shown in fig. 1, according to the utility model discloses an embodiment, reinforcement 20 extends along the left and right sides direction of casing body 10, and reinforcement 20 about both ends respectively with the left and right sides of casing body 10 correspond the cooperation to promote the connection reliability of reinforcement 20 and casing body 10, increased the post of battery package and bumped the performance. For example, the reinforcing member 20 is formed in a substantially C-shape, and both left and right ends of the reinforcing member 20 are fitted to the left and right side walls of the case body 10, respectively, so that the reinforcing member 20 and the case body 10 can be well fitted to each other.

As shown in fig. 2, according to an optional example of the present invention, the reinforcement 20 is provided with a first rib 22 and a second rib 23, the length of the first rib 22 is greater than the length of the second rib 23 in the left-right direction, the first rib 22 and the second rib 23 are spaced apart from each other in the front-rear direction of the reinforcement 20, and the first rib 22 and the second rib 23 are provided on the reinforcement 20, so that the structural strength of the reinforcement 20 can be improved, and the structural strength of the upper housing 100 can be further improved.

Further, a plurality of electrophoresis liquid leakage holes 21 are respectively formed in the first rib 22 and the second rib 23, and the electrophoresis liquid can enter between the first rib 22 and the outer surface of the upper casing 100 (i.e., in the electrophoresis liquid flow passage) and between the second rib 23 and the outer surface of the upper casing 100 (i.e., in the electrophoresis liquid flow passage) through the electrophoresis liquid leakage holes 21, and then flow out from the gap between the reinforcement member 20 and the casing body 10.

Further, a plurality of electrophoresis weep holes 21 on the first protruding muscle 22 are evenly spaced apart in the left-right direction and are arranged, and a plurality of electrophoresis weep holes 21 on the second protruding muscle 23 are evenly spaced apart in the left-right direction and are arranged, so, the electrophoresis liquid can enter into the electrophoresis liquid runner along first protruding muscle 22 and second protruding muscle 23 evenly in, can promote the electrophoresis effect of upper housing 100.

As shown in fig. 6, the electrophoretic fluid enters the electrophoretic fluid flow path from the outside through the electrophoretic fluid leakage hole 21, and then may flow out from the gap between the reinforcing member 20 and the casing body 10 (i.e., the arrow direction shown by a and the arrow direction shown by a '), and then flow out of the upper casing 100 in the arrow direction shown by b and the arrow direction shown by b'.

As shown in fig. 2, according to another alternative example of the present invention, the second ribs 23 include two ribs spaced apart from each other in the left-right direction, which can further improve the structural strength of the reinforcing member 20, and the first mounting hole 24 is provided on the reinforcing member 20, and the first mounting hole 24 is located between the two second ribs 23, so that the reinforcing member 20 can be reliably connected to the housing body 10, and the structure is symmetrical and beautiful.

Further, second mounting holes 25 are provided at both left and right ends of the reinforcing member 20 for fixedly coupling with the sidewalls of the case body 10.

Alternatively, the first bead 22 may be located on the front side of the second bead 23, or the first bead 22 may be located on the rear side of the second bead 23.

As shown in fig. 3, according to still another alternative example of the present invention, the first reinforcing rib 11 is provided on the housing body 10, the first reinforcing rib 11 extends along the left and right directions, the first reinforcing rib 11 includes two sets symmetrically arranged in the left and right directions of the housing body 10, each set of the first reinforcing ribs 11 includes a plurality of spaced apart arranged in the front and rear directions, and when the structural strength of the housing body 10 is improved, it can be ensured that the tolerance of the upper housing 100 on the left and right sides is consistent, that is, the structural strength is uniform.

Further, a hydrophobic groove 12 is defined between every two adjacent first reinforcing ribs 11 in the front-rear direction, so that accumulated water on the surface of the upper shell 100 can flow from a higher position to a lower position, and finally water flows out along the side surface of the upper shell 100, that is, water on the upper shell 100 can flow to the edge of the upper shell 100 through the hydrophobic groove 12, and accumulated water on the upper surface of the upper shell 100 is effectively avoided. The electrophoretic fluid flow path communicates with the hydrophobic groove 12, so that, after electrophoresis is completed, the surplus electrophoretic fluid may enter the hydrophobic groove 12 from the gap between the reinforcing member 20 and the housing body 10 and flow out of the upper housing 100 through the hydrophobic groove 12.

As shown in fig. 3, according to still another alternative example of the present invention, a second reinforcing rib 13 is further provided on the housing body 10, the second reinforcing rib 13 extends in the front-rear direction, and the second reinforcing rib 13 penetrates through the front and rear ends of the housing body 10, and the left and right sides of the second reinforcing rib 13 are respectively connected in series with the plurality of first reinforcing ribs 11 of the corresponding group, so that the second reinforcing rib 13 and the two groups of first reinforcing ribs 11 are formed into a structure of a shape like a Chinese character "feng", and the structural strength and rigidity of the upper housing 100 are improved.

Further, the first reinforcing rib 11 and the second reinforcing rib 13 are both formed as fishbone-shaped reinforcing ribs, which improves the force transmission effect of the housing body 10 to further improve the structural strength of the housing body 10. As shown in fig. 3, the four fishbone-shaped reinforcing ribs in the left-right direction of each set are strung together by one fishbone-shaped reinforcing rib in the front-back direction.

Optionally, a mark part 15 for adhering a mark is provided on the surface of the housing body 10, and the mark part 15 can improve the structural strength of the housing body 10. In addition, the U-shaped reinforcing ribs 16 and the rectangular reinforcing ribs 17 are provided at the respective front and rear sides of the housing body 10, so that the strength and rigidity of the upper housing 100 can be greatly increased while the surface of the upper housing 100 is fully utilized.

Optionally, the reinforcing member 20 is formed in a substantially C-shape, and the outer periphery of the housing body 10 is provided with a substantially right-angled folded flange 14, so as to further improve the sealing performance of the battery pack, for example, the sealing rating of IPX9 can be satisfied. Further, the flanges 14 at the four corners of the housing body 10 are cut, so that the flanges 14 avoid wrinkles at the corners, and meanwhile, the lightweight design is realized.

Further, a positioning fitting hole 141 is provided on the flange 14 for mounting and positioning in a square. Alternatively, the positioning fitting hole 141 may be formed as a bar-shaped hole. Optionally, the surface of the flange 14 is provided with an arc-shaped sealing surface 143, a positioning assembly hole 141 is provided at a transition position of the arc-shaped sealing surface 143, so as to facilitate the assembly and positioning of the upper casing 100, and the positioning assembly hole 141 of the casing body 10 is designed in a diagonal structure.

Optionally, a fixing connection hole 142 is formed on the flange 14 to realize a fitting connection with the lower case of the battery pack.

As shown in fig. 3, four corners of the housing body 10 are formed into circular arc structures, which facilitates molding and reduces stress concentration.

According to the utility model discloses power battery package of second aspect includes according to the last casing 100 of the battery package in above-mentioned embodiment, casing and electric core module down, goes up the turn-ups 14 of casing 100 and the outer peripheral cooperation of casing is connected down, goes up casing 100 and casing down and prescribes a limit to the installation cavity jointly, and electric core module establishes in the installation cavity.

According to the utility model discloses a power battery package through linking to each other reinforcement 20 and casing body 10, can improve casing body 10's structural strength. By providing the reinforcement member 20 with the plurality of electrophoretic weep holes 21 and defining an electrophoretic fluid flow path between the reinforcement member 20 and the case body 10, the electrophoretic area of the upper case 100 is increased, and the corrosion resistance of the upper case 100 is improved.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An upper case (100) of a battery pack, comprising:

a housing body (10);

the electrophoresis tank comprises a reinforcing piece (20), wherein the reinforcing piece (20) is connected to the shell body (10), a plurality of electrophoresis liquid leakage holes (21) are formed in the reinforcing piece (20), an electrophoresis liquid flow channel is defined between the reinforcing piece (20) and the shell body (10), and the electrophoresis liquid leakage holes (21) are respectively communicated with the electrophoresis liquid flow channel.

2. The upper case (100) of the battery pack according to claim 1, wherein the reinforcement (20) extends in a left-right direction of the case body (10), and left and right ends of the reinforcement (20) are respectively fitted to left and right sides of the case body (10).

3. The upper case (100) of the battery pack according to claim 2, wherein the reinforcement (20) is provided with a first rib (22) and a second rib (23), the length of the first rib (22) is greater than the length of the second rib (23) in the left-right direction, the first rib (22) and the second rib (23) are arranged in the front-rear direction of the reinforcement (20) at intervals, and the plurality of electrophoretic leakage holes (21) are respectively provided on the first rib (22) and the second rib (23).

4. The upper case (100) of the battery pack according to claim 3, wherein the second ribs (23) include two ribs arranged at a distance in the left-right direction, and a first mounting hole (24) is provided on the reinforcement member (20), the first mounting hole (24) being located between the two second ribs (23).

5. The upper case (100) of the battery pack according to claim 3, wherein the case body (10) is provided with first reinforcing ribs (11), the first reinforcing ribs (11) extend in the left-right direction, the first reinforcing ribs (11) include two sets arranged symmetrically in the left-right direction of the case body (10), and each set of the first reinforcing ribs (11) includes a plurality of reinforcing ribs arranged at intervals in the front-rear direction.

6. The upper case (100) of the battery pack according to claim 5, wherein a hydrophobic groove (12) is defined between every adjacent two of the first reinforcing ribs (11) in the front-to-rear direction, and the electrophoretic fluid flow channel communicates with the hydrophobic groove (12).

7. The upper case (100) of the battery pack according to claim 5, wherein the case body (10) is further provided with a second reinforcing rib (13), the second reinforcing rib (13) extends in the front-rear direction and penetrates through the front end and the rear end of the case body (10), and the left and right sides of the second reinforcing rib (13) are respectively connected in series with the plurality of first reinforcing ribs (11) of the corresponding group.

8. The upper case (100) of the battery pack according to claim 7, wherein the first reinforcing rib (11) and the second reinforcing rib (13) are each formed as a fishbone-shaped reinforcing rib.

9. The upper case (100) of a battery pack according to any one of claims 2 to 8, wherein the reinforcing member (20) is formed substantially in a C-shape, the outer periphery of the case body (10) is provided with a burring (14) bent substantially at a right angle, and a positioning fitting hole (141) and a fixing attachment hole (142) are provided on the burring (14).

10. A power battery pack, comprising:

the upper case (100) of the battery pack according to any one of claims 1 to 9;

the flanging (14) of the upper shell (100) is connected with the outer periphery of the lower shell in a matching way, and the upper shell (100) and the lower shell jointly define a mounting cavity;

the battery cell module is arranged in the installation cavity.