CN211789148U

CN211789148U - Fixed frame of power module and power module

Info

Publication number: CN211789148U
Application number: CN202020293417.2U
Authority: CN
Inventors: 赵紫辉; 侯永坤; 江吉兵; 刘金成
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-10-27
Anticipated expiration: 2030-03-11

Abstract

The utility model relates to a power battery technical field discloses a fixed frame and power module of power module. Wherein power module's fixed frame includes: a first frame; the two second frames are arranged at two symmetrical ends of the first frame and positioned on the same side of the first frame, and an accommodating cavity for accommodating the electric core group is formed between the first frame and the two second frames; the two supporting pieces are convexly arranged on one side of the second frame, which is far away from the accommodating cavity, and at least six fixing holes are formed in the supporting pieces along the length direction of the supporting pieces; the first convex rib is arranged on one side, deviating from the accommodating cavity, of the second frame, and one end of the first convex rib extends to the joint of the support piece and the second frame. The utility model discloses a fixed frame processing simple process, the processing cost reduction of power module and the inefficacy risk are low, add the maximum stress that first protruding muscle made the fixed frame of power module to bear and increase, and the increase of fixed orifices number can satisfy the installation intensity of the power module of large capacity.

Description

Fixed frame of power module and power module

Technical Field

The utility model relates to a power battery technical field especially relates to a fixed frame and power module of power module.

Background

The fixed frame of power module has the inside electric core of protection module in order to prevent that electric core from being destroyed the emergence incident, for inside electric core provide support and fix the module installation in the PACK system, for the spacing effect in order to guarantee the installation accuracy of the inside electric core structure of module frame.

The fixed frame of current power module adopts the punching press panel beating structure mostly, and carry out welded connection with curb plate and end plate, protect the inside electric core of module, but more welded connection can lead to the increase of cost, the processing technology degree of difficulty increases, the problem that the inefficacy risk increases, and less module installation fixed point is difficult to satisfy the modal requirement of big module under complicated operating mode, simultaneously because the improvement of the energy density of present to the power module and the requirement of efficiency, the fixed frame's of power module structure needs further improvement.

SUMMERY OF THE UTILITY MODEL

Based on the above, an object of the utility model is to provide a fixed frame of power module has solved the problem that the cost is high, the processing technology degree of difficulty is big, the actual effect risk is high that prior art exists, can be applicable to the power module of higher capacity.

Another object of the utility model is to provide a power module need not to use welding process, and can be applicable to the power module of higher capacity.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a stationary frame for a power module, comprising: a first frame; the number of the second frames is two, the two second frames are arranged at two symmetrical ends of the first frame and are positioned on the same side face of the first frame, and an accommodating cavity for accommodating the electric core group is formed between the first frame and the two second frames; the number of the supporting pieces is two, each supporting piece is arranged on one side, away from the containing cavity, of the second frame in a protruding mode, the length of each supporting piece extends along the length direction of the second frame, and at least six fixing holes are formed in the supporting pieces along the length direction of the supporting pieces; first protruding muscle, first protruding muscle is located the second frame deviates from hold one side in chamber, the one end of first protruding muscle extends to support piece with the junction of second frame, two the second frame first protruding muscle first frame and two support piece integrated injection moulding.

As a preferred scheme of the fixed frame of the power module, each second frame is provided with a plurality of pressure relief holes.

As an optimal scheme of a fixed frame of the power module, the first frame is provided with two second convex ribs which are arranged in parallel, and the electric core group is arranged between the two second convex ribs.

As a preferable scheme of the fixing frame of the power module, the thickness of the first rib gradually increases in a direction approaching the supporting member, and the maximum thickness of the first rib is a preset thickness.

As a preferable scheme of the fixing frame of the power module, the cross section of the first rib is triangular.

As a preferable scheme of the fixing frame of the power module, a ratio of a distance from an edge of the first rib to the support member to the preset thickness is not less than 3.

As a preferable mode of the fixing frame of the power module, a ratio of the preset thickness to the thickness of the supporting member is not less than 1/3.

As a preferable scheme of the fixing frame of the power module, the second frame is arranged perpendicular to the first frame, and the supporting member is arranged parallel to the first frame.

The utility model provides a power module, includes electric core group and above arbitrary scheme power module's fixed frame, electric core group install in hold the intracavity.

As a preferable scheme of the power module, the power module further includes two fixing frame groups, the two fixing frame groups are installed in the accommodating cavity, one of the fixing frame groups is located between the electric core group and one of the second frames, and the other fixing frame group is located between the electric core group and the other of the second frames.

The utility model has the advantages that: the utility model discloses a fixed frame structure of power module is simple, and through the integrated into one piece that moulds plastics, the assembly space reduces, has that processing technology is simple, the processing cost reduces and the advantage that the inefficacy risk reduces, and in addition, the first protruding muscle of addding on the second frame makes the maximum stress that the fixed frame of power module can bear increase, and the number of fixed orifices increases than prior art on the support piece, can satisfy the installation strength of the power module of large capacity.

The utility model discloses a power module has reduced because the fixed frame of power module damages and makes the probability of this power module's emergence damage owing to adopted the fixed frame of above-mentioned power module.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic view of a fixed frame of a power module according to an embodiment of the present invention in one direction;

FIG. 2 is a schematic view of FIG. 1 in another orientation;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic view of a partial structure of a power module according to an embodiment of the present invention;

FIG. 5 is a schematic view of FIG. 4 in another orientation;

fig. 6 is an exploded view of the structure shown in fig. 4.

In the figure:

11. a first frame; 12. a second rib; 21. a second frame; 210. a pressure relief vent; 22. a first rib; 3. a support member; 30. a fixing hole; 4. the electric core group; 5. a fixed frame group.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, the present embodiment provides a fixing frame for a power module of the power module, which includes a first frame 11, two second frames 21, two supporting members 3 and two first ribs 22, wherein the two second frames 21 are disposed at two symmetrical ends of the first frame 11 and located on the same side of the first frame 11, an accommodating cavity for accommodating an electric core assembly 4 is formed between the first frame 11 and the two second frames 21, and specifically, the second frames 21 are disposed perpendicular to the first frame 11.

As shown in fig. 3, each supporting member 3 is convexly disposed on a side of the second frame 21 facing away from the accommodating cavity, a length of the supporting member 3 extends along a length direction of the second frame 21, the supporting member 3 is disposed in parallel with the first frame 11, and ten fixing holes are disposed on the supporting member 3 along the length direction thereof. In the prior art, five fixing holes 30 are formed in the support 3, and compared with the five fixing holes 30 in the prior art, the ten fixing holes 30 in the embodiment can increase the connection strength between the support 3 and the box body connected with the support, i.e., the connection strength between the fixing frame of the power module and the box body is increased, so that the fixing frame of the power module can be applied to the power module with large capacity. Of course, in other embodiments of the present invention, the number of the fixing holes 30 may be other than ten and not less than six, and is specifically set according to actual needs.

The first rib 22 is arranged on one side of the second frame 21 departing from the accommodating cavity, and one end of the first rib 22 extends to the joint of the support member 3 and the second frame 21. The two supporting members 3, the two second frames 21, the first frame 11 and the two first ribs 22 of the present embodiment are integrally formed by injection molding into an integrally formed piece, which is made of aluminum by injection molding.

Because the fixed frame of the power module of this embodiment is moulded plastics by aluminium and is formed, the position that needs machining is less, has saved the manufacturing cost of the fixed frame of power module. Compared with the prior art, no extra welding process is needed between the second frame 21 and the first frame 11, so that the processing process of the fixed frame of the power module is simple, the processing time of the fixed frame of the power module is short, and the production efficiency of the fixed frame of the power module is improved.

Further, as shown in fig. 1, each second frame 21 of this embodiment is provided with a plurality of pressure relief holes 210, and once the power module is out of thermal runaway, the pressure relief holes 210 can discharge the gas instantly gathered by the electric core assembly 4, so that a more serious thermal runaway accident is not caused, and the probability of explosion caused by thermal runaway of the power module is reduced.

The fixed frame structure of the power module that this embodiment provided is simple, and through the integrated into one piece that moulds plastics, the assembly space reduces, has the advantage that processing technology is simple, the processing cost reduces and the risk that became invalid reduces. In addition, the first rib 22 additionally arranged on the second frame 21 increases the maximum stress that the fixed frame of the power module can bear, and the number of the fixing holes 30 on the support member 3 is increased compared with the prior art, so that the installation strength of the large-capacity power module can be met.

Specifically, the first protruding muscle 22 integrated into one piece of this embodiment need not machining and tailor-welding technology on second frame 21, and this first protruding muscle 22's occupation space is less simultaneously, and the fastener does not contact with this first protruding muscle 22 when the fixed frame of power module passes through fasteners such as bolts with the box and is connected for the first protruding muscle 22 that adds can not increase the space of whole power module, does benefit to the miniaturized setting of power module.

Further, as shown in fig. 3, the thickness of the first rib 22 of the present embodiment gradually increases in a direction approaching the support member 3, and the cross section of the first rib 22 is triangular. The maximum thickness of the first rib 22 is a preset thickness a, the distance from the edge of the first rib 22 to the support member 3 is b, the thickness of the support member 3 is c, the ratio of b to a is 3, and the ratio of a to c is 1/3, i.e., b is the same as c. Of course, in other embodiments of the present invention, the ratio of b to a may also be greater than 3, and the ratio of a to c may also be greater than 1/3, which is specifically selected according to actual needs.

In order to limit the electric core group 4 in a designated area, as shown in fig. 1 to fig. 3, two second convex ribs 12 are arranged on the first frame 11 of the present embodiment, the two second convex ribs 12 are arranged in parallel, and during assembly, the two second convex ribs 12 are respectively located at two ends of the electric core group 4 along the length direction, that is, the electric core group 4 is located between the two second convex ribs 12, so as to ensure the assembly accuracy of the electric core group 4 on the fixed frame of the power module.

In order to prevent stress concentration at the corners due to injection molding, as shown in fig. 3, the second frame 21 is connected to the first frame 11 with rounded corners, and the first rib 22 is connected to the support member 3 with rounded corners.

As shown in fig. 4 to fig. 6, the embodiment further provides a power module, which includes a plurality of electric cores 4, two fixing frame sets 5 and the fixing frames of the power module of the embodiment, the electric cores 4 are composed of a plurality of electric cores, the electric cores 4 and the fixing frames are installed in the accommodating cavities, the electric cores 4 are located between two second ribs 12, the two fixing frame sets 5 are respectively located between the electric cores 4 and the second frames 21, that is, one fixing frame set 5 is located between the electric core set 4 and one second frame 21, and the other fixing frame set 5 is located between the electric core set 4 and the other second frame 21. Specifically, be equipped with on the mount group 5 and dodge the groove, second protruding muscle 12 is located and dodges the inslot for the second protruding muscle 12 that adds still can not increase the volume of power module in spacing electric core group 4, does benefit to the miniaturized setting of power module.

The power module of this embodiment has reduced the probability that makes this power module take place to damage because the fixed frame of power module damages owing to adopted the fixed frame of above-mentioned power module.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A fixed frame of power module characterized in that includes:

a first frame (11);

the number of the second frames (21) is two, the two second frames (21) are arranged at two symmetrical ends of the first frame (11) and are positioned on the same side face of the first frame (11), and an accommodating cavity for accommodating the electric core group (4) is formed between the first frame (11) and the two second frames (21);

the number of the supporting pieces (3) is two, each supporting piece (3) is arranged on one side, away from the containing cavity, of the second frame (21) in a protruding mode, the length of each supporting piece (3) extends along the length direction of the second frame (21), and at least six fixing holes are formed in each supporting piece (3) along the length direction of each supporting piece;

first protruding muscle (22), first protruding muscle (22) are located second frame (21) deviates from hold one side in chamber, the one end of first protruding muscle (22) extends to support piece (3) with the junction of second frame (21), two second frame (21) first protruding muscle (22) first frame (11) and two support piece (3) an organic whole injection moulding.

2. The fixed frame of a power module according to claim 1, characterized in that each of said second frames (21) is provided with a plurality of pressure relief holes (210).

3. The fixed frame of the power module as claimed in claim 1, wherein the first frame (11) is provided with two second ribs (12), the two second ribs (12) are arranged in parallel, and the electric core set (4) is located between the two second ribs (12).

4. A fixing frame of a power module according to claim 3, characterized in that the thickness of the first rib (22) increases gradually in the direction approaching the support (3), the maximum thickness of the first rib (22) being a preset thickness.

5. A fixing frame of a power module according to claim 4, characterized in that the cross section of the first rib (22) is triangular.

6. A fixing frame of a power module according to claim 4, characterized in that the ratio of the distance from the edge of the first rib (22) to the support (3) to the preset thickness is not less than 3.

7. The stationary frame of a power module according to claim 4, characterized in that the ratio of said preset thickness to the thickness of said support (3) is not less than 1/3.

8. The fixed frame of a power module according to claim 1, characterized in that said second frame (21) is arranged perpendicularly to said first frame (11), said support (3) being arranged parallel to said first frame (11).

9. A power module, characterized in that it comprises a battery pack (4) and a fixed frame of the power module according to any of claims 1-8, said battery pack (4) being mounted in said housing cavity.

10. The power module according to claim 9, characterized in that it further comprises two fixing bracket sets (5), two fixing bracket sets (5) being mounted in the receiving cavity, wherein one fixing bracket set (5) is located between the electric core set (4) and one second frame (21), and the other fixing bracket set (5) is located between the electric core set (4) and the other second frame (21).