CN216793825U

CN216793825U - Lower case of battery pack

Info

Publication number: CN216793825U
Application number: CN202220232965.3U
Authority: CN
Inventors: 不公告发明人
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-06-21
Anticipated expiration: 2032-01-27

Abstract

The utility model discloses a lower shell of a battery pack, which comprises: a housing body defining an installation space; the heat exchange plate is arranged in the installation space and connected with the shell body, and a heat exchange flow channel is defined by the heat exchange plate and the shell body together. From this, inject the heat transfer runner through heat transfer board and shell body jointly, can make the structure of shell body be the structure of heat transfer runner, can make heat transfer runner and lower casing integrated, compare with prior art, need not set up cooling device alone in the lower casing, saved the internal installation space of inferior valve, can set up more battery modules in installation space, be favorable to promoting battery package energy density.

Description

Lower case of battery pack

Technical Field

The utility model relates to the field of batteries, in particular to a lower shell of a battery pack.

Background

After the energy of battery package promotes, battery package thermal balance problem is more and more paid attention to, and battery package thermal balance not only provides the guarantee for battery package continuation of the journey, also is the important measure of battery package thermal runaway protection simultaneously.

In the related art, in order to meet the requirements of heating and cooling the battery pack, a cooling device is disposed inside a housing of the battery pack, and the cooling device is a separate component, such as: cooling device sets up to the cooling plate, prescribes a limit to cooling channel in the cooling plate, and wherein, cooling device leads to cooling device installation process many through welding or bolted mounting in the casing, needs a large amount of equipment, artificial resources, the extensive volume production of being not convenient for to, cooling device occupies a large amount of spaces in the casing inside, is unfavorable for the promotion of battery package energy density.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a lower case of a battery pack, in which the structure of the case body can be configured as a heat exchange flow channel, the heat exchange flow channel can be integrated with the lower case, and the improvement of energy density of the battery pack is facilitated.

The lower case of the battery pack according to the present invention includes: a housing body defining an installation space; the heat exchange plate is arranged in the installation space and connected with the shell body, and a heat exchange flow channel is defined by the heat exchange plate and the shell body together.

In some examples of the present invention, the shell body is provided with a runner channel depressed toward an outside of the shell body, an end of the runner channel near the installation space is open, and the heat exchange plate is to seal the open end of the runner channel to form the heat exchange runner.

In some examples of the present invention, the case body includes a bottom wall and a side wall which together define the installation space, the bottom wall is provided with the runner duct, and the heat exchange plate is installed to the bottom wall.

In some examples of the utility model, the heat exchanger plate is bonded to the shell body.

In some examples of the present invention, the heat exchange plate is provided with a refrigerant inlet and a refrigerant outlet, and both the refrigerant inlet and the refrigerant outlet are communicated with the heat exchange flow channel.

In some examples of the utility model, the heat exchanger plate is provided with a module mounting beam.

In some examples of the utility model, the heat exchanger plates are provided with insulating strips.

In some examples of the utility model, the shell body is constructed as a high strength aluminum piece or a high strength steel piece.

In some examples of the utility model, the shell body has a first side and a second side opposite to each other in a first direction of the lower shell, the first side and/or the second side is provided with a first reinforcing beam extending in a second direction of the lower shell, and the bottom wall of the shell body is provided with a second reinforcing beam extending in the first direction and connected to the first reinforcing beam, wherein the first direction and the second direction are perpendicular.

In some examples of the present invention, the side wall of the case body is provided with a third reinforcing beam extending in the third direction of the lower case and connected to the first reinforcing beam.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a lower housing according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a top view of a lower housing according to an embodiment of the present invention;

FIG. 4 is a side view of a lower housing according to an embodiment of the present invention;

FIG. 5 is a bottom view of the lower housing according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a lower housing according to an embodiment of the present invention;

fig. 7 is an enlarged view at B in fig. 6.

Reference numerals:

a lower case 100;

a case body 10; an installation space 11; a heat exchange flow passage 12; a runner groove 13; a bottom wall 14; a side wall 15;

a heat exchange plate 20; a refrigerant inlet 21; a refrigerant outlet 22;

a module mounting beam 30;

an insulating strip 40;

a first reinforcement beam 50; a fitting hole 51; positioning holes 52;

a second reinforcement beam 60; and a third reinforcing beam 70.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The lower case 100 of the battery pack according to the embodiment of the present invention, in which the battery module may be mounted, is described below with reference to fig. 1 to 7.

As shown in fig. 1 to 7, a lower case 100 according to an embodiment of the present invention includes: a shell body 10 and a heat exchanger plate 20. The case body 10 defines a mounting space 11, and further, as shown in fig. 1, the case body 10 defines a mounting space 11 having an open upper end, and the battery module is mounted in the mounting space 11. The heat exchanger plate 20 is provided as a heat conducting member, for example: the heat exchange plate 20 is a metal piece, the heat exchange plate 20 may be made of aluminum material, the heat exchange plate 20 may also be made of steel material, the heat exchange plate 20 is disposed in the installation space 11, the heat exchange plate 20 is connected with the shell body 10, and the heat exchange flow passage 12 is defined by the heat exchange plate 20 and the shell body 10 together.

Wherein, the heat exchange flow channel 12 can be provided with a cooling medium (for example, the cooling medium is water or gas), after the battery module is installed in the installation space 11, the battery module contacts with the heat exchange plate 20, when the temperature of the battery module is higher than the temperature of the cooling medium, the heat of the battery module is transferred to the cooling medium through the heat exchange plate 20, the cooling medium transfers the heat to the shell body 10, so as to reduce the temperature of the battery module and achieve the effect of cooling the battery module, when the temperature of the battery module is lower than the temperature of the cooling medium, the heat of the cooling medium is transferred to the battery module through the heat exchange plate 20, so as to raise the temperature of the battery module and achieve the effect of heating the battery module, so that the battery module can be kept at a proper working temperature, thereby avoiding the thermal runaway of the battery module, and the heat exchange flow channel 12 can be defined by the heat exchange plate 20 and the shell body 10 together, so that the heat exchange flow channel 12 can be integrated on the shell body 10, compared with the prior art, need not set up cooling device alone in casing 100 down, saved installation space 11 in the casing 100 down, can set up more battery module in installation space 11, increase battery package energy, be favorable to promoting battery package energy density.

From this, inject heat transfer runner 12 through heat transfer board 20 and shell body 10 jointly, can make the structure of shell body 10 construct for the structure of heat transfer runner 12, can make heat transfer runner 12 and shell 100 integration down, compare with prior art, need not set up cooling device alone in shell 100 down, saved installation space 11 in the shell 100 down, can set up more battery modules in installation space 11, be favorable to promoting battery package energy density.

In some embodiments of the present invention, as shown in fig. 7, the case body 10 is provided with a runner channel 13 depressed toward the outside of the case body 10, the runner channel 13 is openly provided near an end of the installation space 11, the runner channel 13 communicates with the installation space 11, and the heat exchange plate 20 serves to seal the open end of the runner channel 13 to form the heat exchange runner 12. After the heat exchange plate 20 is installed in the installation space 11, the heat exchange plate 20 seals the open end of the runner channel 13, so that the heat exchange plate 20 and the shell body 10 jointly define the closed heat exchange runner 12.

In some embodiments of the present invention, as shown in fig. 1 and 7, the case body 10 may include a bottom wall 14 and a side wall 15, the bottom wall 14 and the side wall 15 together defining the installation space 11, as shown in fig. 1, the side wall 15 is provided in a closed loop structure, the side wall 15 is provided around a circumferential edge of the bottom wall 14, a lower end of the side wall 15 is connected to the bottom wall 14, and the bottom wall 14 and the side wall 15 are configured as an integral molding member, such that the configuration can improve the structural strength of the lower case 100. Further, as shown in fig. 7, the bottom wall 14 of the shell body 10 is provided with a flow channel groove 13, the heat exchange plate 20 is installed on the bottom wall 14, specifically, the flow channel groove 13 is recessed towards the lower part of the bottom wall 14 of the shell body 10, and the heat exchange plate 20 is installed on the inner surface of the bottom wall 14 of the shell body 10, wherein after the battery module is installed in the installation space 11, the contact area between the battery module and the bottom wall 14 of the shell body 10 is larger than the contact area between the battery module and the side wall 15 of the shell body 10, and by arranging the flow channel groove 13 and the heat exchange plate 20 on the bottom wall 14 of the shell body 10, the heat exchange flow channel 12 can be arranged on the bottom wall 14 of the shell body 10, so that the heat exchange effect on the battery module can be ensured, and the use safety of the battery module can be ensured.

In some embodiments of the present invention, the side wall 15 of the shell body 10 may also be provided with the runner groove 13, and the heat exchange plate 20 is mounted on the side wall 15 of the shell body 10, so that the heat exchange runner 12 can be disposed on the side wall 15 of the shell body 10, and when the battery module contacts the heat exchange plate 20, the refrigerant can exchange heat with the battery module, thereby achieving an effect of cooling or heating the battery module.

In some embodiments of the present invention, the bottom wall 14 of the case body 10 and the side wall 15 of the case body 10 are both provided with the runner groove 13, and at this time, the bottom wall 14 of the case body 10 and the side wall 15 of the case body 10 are both provided with the heat exchange plate 20, so that the heat exchange runner 12 can be arranged on the side wall 15 and the bottom wall 14 of the case body 10, and the heat exchange area between the heat exchange plate 20 and the battery module can be increased, so as to rapidly cool or heat the battery module, and further ensure that the battery module works in a suitable temperature environment.

In some embodiments of the utility model, the heat exchanger plate 20 is bonded to the shell body 10. Wherein, when the diapire 14 of shell body 10 is provided with runner channel 13, and heat transfer board 20 installs in the internal surface of the diapire 14 of shell body 10, the regional structure of scribbling that the diapire 14 of shell body 10 does not set up runner channel 13 glues, heat transfer board 20 bonds in shell body 10 through the structure glue, thereby make the open end seal of runner channel 13 in order to form sealed heat transfer runner 12, so set up the assembly process that can simplify heat transfer board 20 and shell body 10, need not drop into a large amount of equipment, artificial resources, casing 100 under the large-scale volume production of being convenient for.

However, the present invention is not limited thereto, and the heat exchange plate 20 may also be mounted to the shell body 10 by bolts, and a sealing gasket may be interposed between the heat exchange plate 20 and the bottom wall 14 of the shell body 10, so that the open end of the flow channel groove 13 may be sealed to form a sealed heat exchange flow channel 12, and the sealing property of the heat exchange flow channel 12 is ensured, thereby preventing the refrigerant from flowing into the mounting space 11 of the lower shell 100.

In some embodiments of the present invention, as shown in fig. 1, the heat exchange plate 20 is provided with a refrigerant inlet 21 and a refrigerant outlet 22, and both the refrigerant inlet 21 and the refrigerant outlet 22 are communicated with the heat exchange flow channel 12. Further, refrigerant import 21 and refrigerant export 22 all are located installation space 11, the refrigerant can follow refrigerant import 21 and flow into heat transfer runner 12 in, then the refrigerant flows along heat transfer runner 12, the refrigerant in the final heat transfer runner 12 flows out heat transfer runner 12 from refrigerant export 22, the setting can make the refrigerant flow in heat transfer runner 12 like this, and also can make the refrigerant flow in or flow out heat transfer runner 12, can guarantee the heat exchange efficiency of refrigerant, thereby cool off or heat the battery module better.

In some embodiments of the present invention, the heat exchange plate 20 is provided with a module installation beam 30, as shown in fig. 1, the module installation beam 30 is installed on the upper surface of the heat exchange plate 20, the module installation beam 30 may be adhered to the upper surface of the heat exchange plate 20, the module installation beam 30 may also be installed on the heat exchange plate 20 through a bolt, the module installation beam 30 may also be clamped on the heat exchange plate 20, the module installation beam 30 is used for installing a battery module, further, the module installation beam 30 is provided with a bolt installation hole, and the battery module is installed on the module installation beam 30 through the cooperation of the bolt and the bolt installation hole, so that the battery module can be fixed in the lower housing 100, the battery module can be prevented from moving, and the positional stability of the battery module can be ensured.

Further, a plurality of module mounting beams 30 are arranged on the heat exchanger plate 20, and the plurality of module mounting beams 30 are arranged at intervals in sequence, for example: as shown in fig. 3, two module mounting beams 30 are disposed on the heat exchange plate 20, the two module mounting beams 30 are sequentially spaced apart from each other in the front-rear direction of the lower housing 100, and the same battery module is simultaneously mounted on the two module mounting beams 30, so that the battery module can be more stably mounted in the lower housing 100, and the battery module can be further prevented from moving, thereby further ensuring the positional stability of the battery module.

In some embodiments of the present invention, as shown in fig. 1, the heat exchange plate 20 may be provided with a plurality of insulating strips 40, the insulating strips 40 are installed on the upper surface of the heat exchange plate 20, the insulating strips 40 may be bonded to the upper surface of the heat exchange plate 20, further, the insulating strips 40 may be provided in plurality, the insulating strips 40 are sequentially arranged in parallel, the insulating strips 40 are sequentially arranged in the left and right directions of the lower housing 100 at intervals, after the battery module is installed in the installation space 11, the insulating strips 40 are clamped between the heat exchange plate 20 and the battery module, the insulating strips 40 have an insulating function, and can prevent electricity from being transmitted to the lower housing 100 when the battery module leaks electricity, so that electricity leakage of the battery pack can be avoided, and the use safety of the battery pack can be improved.

In some embodiments of the present invention, the case body 10 may be configured as a high-strength aluminum member or a high-strength steel member, and it is also understood that the case body 10 may be made of a high-strength aluminum material (high-strength aluminum alloy), and the case body 10 may also be made of a high-strength steel material, preferably, the case body 10 is made of a high-strength aluminum alloy, and the case body 10 may be formed by stamping and forming a high-strength aluminum alloy, and the runner channels 13 are stamped out simultaneously in the stamping process, so that the structural strength of the case body 10 can be improved, and the deformation resistance of the lower case 100 can be improved, so that the lower case 100 can better protect the battery module, and the weight of the lower case 100 can be prevented from being increased, which is beneficial to the lightweight design of the lower case 100.

In some embodiments of the present invention, the case body 10 has opposite first and second sides in a first direction of the lower case 100, as shown in fig. 1, the first direction of the lower case 100 refers to a left-right direction of the lower case 100, the first and/or second sides are provided with the first reinforcing beams 50, preferably, the first and second sides of the case body 10 are each provided with the first reinforcing beams 50, the first reinforcing beams 50 may be welded to an outer surface of the case body 10, the first reinforcing beams 50 are extended in a second direction of the lower case 100, as shown in fig. 1, the second direction of the lower case 100 refers to a front-rear direction of the lower case 100, and a manufacturing material of the first reinforcing beams 50 may be the same as a manufacturing material of the case body 10. The bottom wall 14 of the shell body 10 is provided with a second reinforcing beam 60 extending in a first direction, the second reinforcing beam 60 may be made of the same material as the shell body 10, the second reinforcing beam 60 may be welded to the outer surface of the bottom wall 14 of the shell body 10, and the second reinforcing beam 60 is connected to the first reinforcing beam 50, wherein the first direction and the second direction are perpendicular. Further, the left end of the second reinforcing beam 60 is welded to the first reinforcing beam 50 located on the left side of the case body 10, and the right end of the second reinforcing beam 60 is welded to the first reinforcing beam 50 located on the right side of the case body 10, so that the first reinforcing beam 50 and the second reinforcing beam 60 can form a frame structure, the frame structure formed by the first reinforcing beam 50 and the second reinforcing beam 60 can support the case body 10, the structural strength of the case body 10 can be improved, and the risk that the case body 10 deforms and breaks the battery module by extrusion can be reduced.

In some embodiments of the present invention, the side wall 15 of the hull body 10 is provided with the third reinforcing beam 70, the material of which the third reinforcing beam 70 is made may be the same as the material of which the hull body 10 is made, and further, the third reinforcing beam 70 may be welded to the outer surface of the side wall 15 of the hull body 10, as shown in fig. 1, the outer surface of the left side wall 15 and the outer surface of the right side wall 15 of the hull body 10 are each provided with the third reinforcing beam 70, the third reinforcing beam 70 is extended in the third direction of the lower hull 100 and connected to the first reinforcing beam 50, and the third direction of the lower hull 100 is the up-down direction in fig. 1. Further, the outer surface of the left side wall 15 and the outer surface of the right side wall 15 of the case body 10 are both provided with a plurality of third reinforcing beams 70, the plurality of third reinforcing beams 70 on the left side wall 15 of the case body 10 are sequentially spaced in the second direction of the lower case 100, and the plurality of third reinforcing beams 70 on the right side wall 15 of the case body 10 are sequentially spaced in the second direction of the lower case 100, so that the structural strength of the case body 10 can be further improved, and the risk that the battery module is damaged due to deformation and extrusion of the case body 10 can be further reduced.

Further, as shown in fig. 2, the lower end of the third reinforcing beam 70 is welded to the lower surface of the first reinforcing beam 50, and the second reinforcing beam 60 is welded to the lower surface of the first reinforcing beam 50, so that the first reinforcing beam 50, the second reinforcing beam 60, and the third reinforcing beam 70 can be reliably assembled into a whole, the structural strength of the case body 10 can be further improved, and the risk that the case body 10 is deformed and crushes the battery module can be further reduced.

Further, as shown in fig. 2, the first reinforcing beam 50, the second reinforcing beam 60, and the third reinforcing beam 70 are provided with assembly holes 51, the assembly holes 51 of the first reinforcing beam 50, the assembly holes 51 of the second reinforcing beam 60, and the assembly holes 51 of the third reinforcing beam 70 are provided in a one-to-one correspondence, and the battery pack can be fixed to other parts by passing bolts through the assembly holes 51.

Further, as shown in fig. 2, the first reinforcing beam 50, the second reinforcing beam 60 and the third reinforcing beam 70 are all provided with positioning holes 52, the positioning holes 52 of the first reinforcing beam 50, the positioning holes 52 of the second reinforcing beam 60 and the positioning holes 52 of the third reinforcing beam 70 are arranged in a one-to-one correspondence, and in the process of mounting the battery pack on other parts, the positioning columns can penetrate through the positioning holes 52 to pre-position the battery pack on the other parts, so that the mounting efficiency of fixing the battery pack on the other parts can be improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A lower case (100) of a battery pack, comprising:

a case body (10), the case body (10) defining a mounting space (11);

the heat exchange plate (20) is arranged in the installation space (11) and connected with the shell body (10), and the heat exchange plate (20) and the shell body (10) jointly define a heat exchange flow channel (12).

2. The lower case (100) of a battery pack according to claim 1, wherein the case body (10) is provided with a flow channel groove (13) depressed toward the outside of the case body (10), the end of the flow channel groove (13) near the mounting space (11) is open, and the heat exchange plate (20) serves to seal the open end of the flow channel groove (13) to form the heat exchange flow channel (12).

3. The lower case (100) of the battery pack according to claim 2, wherein the case body (10) includes a bottom wall (14) and a side wall (15), the bottom wall (14) and the side wall (15) together defining the mounting space (11), the bottom wall (14) being provided with the flow channel groove (13), and the heat exchange plate (20) being mounted to the bottom wall (14).

4. The lower case (100) of the battery pack according to claim 1, wherein the heat exchange plate (20) is bonded to the case body (10).

5. The lower case (100) of the battery pack according to claim 1, wherein the heat exchange plate (20) is provided with a refrigerant inlet (21) and a refrigerant outlet (22), and both the refrigerant inlet (21) and the refrigerant outlet (22) are communicated with the heat exchange flow channel (12).

6. The lower case (100) of the battery pack according to claim 1, wherein the heat exchange plate (20) is provided with a module mounting beam (30).

7. The lower case (100) of the battery pack according to claim 1, wherein the heat exchange plate (20) is provided with an insulating strip (40).

8. The lower case (100) of the battery pack according to claim 1, wherein the case body (10) is constructed of a high-strength aluminum member or a high-strength steel member.

9. The lower case (100) of the battery pack according to claim 1, wherein the case body (10) has opposite first and second sides in a first direction of the lower case (100), the first side and/or the second side is provided with a first reinforcing beam (50), the first reinforcing beam (50) extends in a second direction of the lower case (100), the bottom wall (14) of the case body (10) is provided with a second reinforcing beam (60) extending in the first direction, the second reinforcing beam (60) is connected with the first reinforcing beam (50), wherein the first direction and the second direction are perpendicular.

10. The lower case (100) of the battery pack according to claim 9, wherein the side wall (15) of the case body (10) is provided with a third reinforcing beam (70), the third reinforcing beam (70) extending in a third direction of the lower case (100) and being connected with the first reinforcing beam (50).