CN211530138U - Heat dissipation box and battery package - Google Patents

Abstract

The utility model relates to the technical field of power batteries, and provides a heat dissipation box body and a battery pack, the heat dissipation box body is used for accommodating a battery module, and comprises a bottom plate, a first supporting beam and a second supporting beam which are arranged on the bottom plate, and a heat dissipation bracket which is arranged on the bottom plate and is positioned between the first supporting beam and the second supporting beam, the first supporting beam, the second supporting beam and the heat dissipation bracket are suitable for being abutted against the bottom of the battery module when the heat dissipation box body accommodates the battery module, the heat dissipation bracket comprises a first heat conduction part, a second heat conduction part and a third heat conduction part which are respectively arranged at the opposite sides of the first heat conduction part, the second heat conduction part and the third heat conduction part extend along the length direction of the battery module, the length of the first heat conduction part is larger than that of the second heat conduction part and the third heat conduction part, the heat dissipation box body can enable the battery, thereby avoiding the battery module to appear the great condition of difference in temperature at the heat dissipation in-process, effectively improving the heat dispersion of battery package.

Description

Heat dissipation box and battery package

Technical Field

The utility model relates to a power battery technical field especially provides a heat dissipation box and battery package.

Background

With the development of new energy industry, electric vehicles or hybrid vehicles are gradually popularized, a battery pack is used as a core component of the electric vehicles or hybrid vehicles, the service life of the electric vehicles or hybrid vehicles is directly affected by the heat dissipation performance of the battery pack, and how to improve the heat dissipation performance of the battery pack becomes a key research topic of various large vehicle manufacturers.

Because simple structure, a supporting beam is usually set up as battery module's bearing structure in the box of battery package, however, this bearing structure can make the heat dissipation condition of different positions of battery module difference appear, leads to the different positions of battery module to appear the great condition of difference in temperature in the heat dissipation process to heat dispersion to the battery package causes harmful effects.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat dissipation box and battery package, it is big to aim at solving the different position difference in temperature of current battery package, the relatively poor technical problem of heat dispersion.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a heat dissipation box, be used for holding battery module, comprising a base plate, and all set up first supporting beam and the second supporting beam on the bottom plate, heat dissipation box is still including locating the heat dissipation support on the bottom plate and be located between first supporting beam and the second supporting beam, first supporting beam, second supporting beam and heat dissipation support are applicable to the bottom of butt in battery module simultaneously when heat dissipation box holding battery module, heat dissipation support includes first heat-conducting part and sets up second heat-conducting part and the third heat-conducting part in the opposite side of first heat-conducting part respectively, first heat-conducting part, second heat-conducting part and third heat-conducting part all extend along the length direction of battery module and the length of first heat-conducting part is greater than the length of second heat-conducting part and third heat-conducting part.

The utility model provides a heat dissipation box has following beneficial effect at least: the first supporting beam, the second supporting beam and the radiating support jointly support the battery module, partial heat generated by the battery module is transmitted to the bottom plate through the first supporting beam and the second supporting beam and then radiated to the outside, and the heat generated by the battery module at the position between the first supporting beam and the second supporting beam is transmitted to the bottom plate through the radiating support and then radiated to the outside, wherein the first heat conducting part can radiate the middle part of the battery module, meanwhile, the heat generated by the two sides of the battery module is radiated outwards through the second heat conducting part and the third heat conducting part, the length of the first heat conducting part is set to be larger than the lengths of the second heat conducting part and the third heat conducting part, so that the heat conduction speed of the middle part of the battery module is larger than the heat conduction speeds of the two sides of the battery module, the battery module is uniformly radiated, and the situation that the temperature difference is large in the radiating process due to slow heat radiation of the middle part of the battery, the heat dissipation performance of the battery pack is effectively improved.

In one embodiment, the heat dissipation bracket further includes a connecting portion, and the first heat conduction portion, the second heat conduction portion and the third heat conduction portion are integrally connected through the connecting portion.

Through adopting above-mentioned embodiment, after the produced heat of battery module work transmitted first heat-conduction portion, second heat-conduction portion and third heat-conduction portion simultaneously, the heat can continue to realize mutual transmission between first heat-conduction portion, second heat-conduction portion and third heat-conduction portion through connecting portion, effectively reduces the difference in temperature between first heat-conduction portion, second heat-conduction portion and the third heat-conduction portion to realize the even heat dissipation to battery module more effectively.

In one embodiment, the first heat conduction portion abuts against a center line of the battery module along the length direction.

Through adopting above-mentioned embodiment for the produced heat in battery module middle part position can outwards give off through first heat-conducting part more evenly, further reduces the difference in temperature at the different positions of battery module.

In one embodiment, the first heat conduction portion is a plurality of, and/or the second heat conduction portion is a plurality of, and/or the third heat conduction portion is a plurality of.

By adopting the embodiment, the number of the first heat-conducting parts, the second heat-conducting parts and the third heat-conducting parts can be adjusted according to the width size of the battery module, so that the heat dissipation uniformity of the battery module is ensured, and the heat dissipation performance of the battery pack is improved.

In one embodiment, the number of the heat dissipation supports is multiple, and the multiple heat dissipation supports are uniformly arranged along the length direction of the battery module.

Through adopting above-mentioned embodiment, make each position of battery module along length direction all can dispel the heat uniformly to reduce the difference in temperature of the different positions of battery module more effectively.

In one embodiment, the first heat conducting portion is a heat conducting beam, a heat conducting sheet or a heat conducting block; the second heat conducting part is a heat conducting beam, a heat conducting sheet or a heat conducting block; the third heat conducting part is a heat conducting beam, a heat conducting sheet or a heat conducting block.

In one embodiment, the length of the heat dissipation bracket is less than the length of the battery module, and the difference between the length of the heat dissipation bracket and the length of the battery module is greater than or equal to 60 mm.

Through adopting above-mentioned embodiment, can effectively guarantee the heat conduction rate of the middle part position of battery module, realize the even heat dissipation of battery module

In order to achieve the above object, the utility model also provides a battery pack, including battery module and the above-mentioned heat dissipation box, the battery module holding is in the heat dissipation box.

Since the battery pack adopts all the embodiments of the heat dissipation box body, at least all the beneficial effects of the embodiments are achieved, and the detailed description is omitted.

In one embodiment, the battery module comprises an electric core assembly and end plates respectively arranged at two ends of the electric core assembly, the two end plates are connected with the first supporting beam and the second supporting beam through fasteners, and the electric core assembly is abutted with the heat dissipation bracket.

By adopting the embodiment, the bottom of the electric core assembly can be in close contact with the first supporting beam, the second supporting beam and the heat dissipation support at the same time, so that the heat generated by the electric core assembly can be effectively dissipated outwards through the first supporting beam, the second supporting beam and the heat dissipation support, and the heat dissipation performance of the battery pack is effectively improved.

In one embodiment, the first support beam and the second support beam respectively abut against opposite sides of the bottom of the battery module, and the heat dissipation bracket abuts against a middle position of the bottom of the battery module.

By adopting the above embodiment, the heat generated at the two sides of the battery module is transmitted to the bottom plate through the first supporting beam and the second supporting beam and is radiated outwards, and the heat generated at the middle part of the battery module is transmitted to the bottom plate through the radiating support and is radiated outwards, so that the uniform radiating of the battery module is effectively realized, and the radiating performance of the battery pack is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 2 is an exploded view of the battery pack shown in fig. 1;

fig. 3 is a schematic view of a partial structure of a heat dissipation box according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a heat dissipating bracket of the heat dissipating box shown in FIG. 3;

fig. 5 is a temperature distribution simulation diagram of a battery pack without a heat dissipation bracket;

fig. 6 is a temperature distribution simulation diagram of a battery pack according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10. the heat dissipation structure comprises a heat dissipation box body, 11, a bottom plate, 12, a first supporting beam, 13, a second supporting beam, 14, a heat dissipation support, 141, a first heat conduction part, 142, a second heat conduction part, 143, a third heat conduction part, 144, a connecting part, 20, a battery module, 21, an electric core assembly, 22, an end plate, 23 and a cover plate.

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 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 drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "top", "bottom", 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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 and 2, a battery pack includes a battery module 20 and a heat dissipation case 10, wherein the battery module 20 is accommodated in the heat dissipation case 10, and heat generated by the battery module 20 is dissipated outwards through the heat dissipation case 10.

Specifically, with continuing reference to fig. 1 and 2, the battery module 20 includes a battery module 21, two end plates 22 and a cover plate 23, wherein the two end plates 22 are respectively mounted at two ends of the battery module 21, and the cover plate 23 covers the battery module 21.

The above-described heat radiation case 10 will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, the heat dissipation case 10 includes a bottom plate 11, a first supporting beam 12 and a second supporting beam 13 both disposed on the bottom plate 11, the heat dissipation case 10 further includes a heat dissipation bracket 14, the heat dissipation bracket 14 is disposed between the first supporting beam 12 and the second supporting beam 13, the first supporting beam 12, the second supporting beam 13, and the heat dissipation bracket 14 are adapted to abut against the bottom of the battery module 20 when the battery module 20 is accommodated in the heat dissipation case 10, the heat dissipation bracket 14 includes a first heat conduction portion 141, and a second heat conduction portion 142 and a third heat conduction portion 143 disposed on opposite sides of the first heat conduction portion 141, the second heat conduction portion 142, and the third heat conduction portion 143 all extend along the length direction of the battery module 20, and the length of the first heat conduction portion 141 is greater than the lengths of the second heat conduction portion 142 and the third heat conduction portion 143.

The first support beam 12, the second support beam 13 and the heat dissipation bracket 14 of the heat dissipation case 10 support the battery module 20 together, part of the heat generated by the battery module 20 is transmitted to the bottom plate 11 through the first support beam 12 and the second support beam 13 and then dissipated to the outside, and the heat generated by the battery module 20 at the position between the first support beam 12 and the second support beam 13 is transmitted to the bottom plate 11 through the heat dissipation bracket 14 and then dissipated to the outside, wherein the first heat conduction part 141 can dissipate the heat of the middle part of the battery module 20, and simultaneously, the heat generated at the two sides of the battery module 20 is dissipated to the outside through the second heat conduction part 142 and the third heat conduction part 143, and the length of the first heat conduction part 141 is set to be greater than the lengths of the second heat conduction part 142 and the third heat conduction part 143, so that the heat conduction rate at the middle part of the battery module 20 is greater than the heat conduction rates at the two sides of the battery module 20, and thus the, therefore, the situation that the temperature difference is large in the heat dissipation process due to the fact that the middle of the battery module 20 dissipates heat slowly is avoided, and the heat dissipation performance of the battery pack is effectively improved.

Referring to fig. 4, the lengths of the second heat conducting portion 142 and the third heat conducting portion 143 are equal, and the length of the first heat conducting portion 141 is 2-5 times that of the second heat conducting portion 142 or the third heat conducting portion 143, so as to ensure that the heat conduction rates of the two sides of the battery module 20 are the same and the heat conduction rate of the middle of the battery module 20 is greater than the heat conduction rates of the two sides of the battery module 20, thereby more effectively achieving uniform heat dissipation of the battery module 20 and further improving the heat dissipation performance of the battery pack.

Alternatively, the second heat conduction portion 141, the second heat conduction portion 142, and the third heat conduction portion 143 in the heat dissipation bracket 14 may be an integrally molded structure; the structure may be a polygonal plate structure or a king-letter structure, and is not limited herein.

Specifically, as shown in fig. 1 and 2, the two end plates 22 of the battery module 20 are connected to the first support beam 12 and the second support beam 13 by fasteners. The battery module 20 is fixedly connected with the first supporting beam 12 and the second supporting beam 13 through the end plate 22, so that the bottom of the electric core assembly 21 can be simultaneously in close contact with the first supporting beam 12, the second supporting beam 13 and the heat dissipation bracket 14, and heat generated by the electric core assembly 21 is effectively dissipated outwards through the first supporting beam 12, the second supporting beam 13 and the heat dissipation bracket 14, thereby effectively improving the heat dissipation performance of the battery pack.

Of course, the fixing connection manner of the battery module 20 to the first support beam 12 and the second support beam 13 is various, such as fastening, welding, etc., and is not limited in particular.

In one embodiment, as shown in fig. 1 and 2, the first support beam 12 and the second support beam 13 respectively abut against opposite sides of the bottom of the battery module 20, and the heat dissipation bracket 14 abuts against a middle portion of the bottom of the battery module 20. The heat generated at the two sides of the battery module 20 is transferred to the bottom plate 11 through the first support beam 12 and the second support beam 13 and is radiated outwards, and the heat generated at the middle of the battery module 20 is transferred to the bottom plate 11 through the heat dissipation bracket 14 and is radiated outwards, so that the uniform heat dissipation of the battery module 20 is effectively realized, and the heat dissipation performance of the battery pack is further improved.

In an embodiment, as shown in fig. 4, the heat dissipating bracket 14 further includes a connecting portion 144, and the first heat conducting portion 141, the second heat conducting portion 142 and the third heat conducting portion 143 are integrally connected by the connecting portion 144. After the heat generated by the battery module 20 is transferred to the first heat conduction part 141, the second heat conduction part 142 and the third heat conduction part 143, the heat can be continuously transferred among the first heat conduction part 141, the second heat conduction part 142 and the third heat conduction part 143 through the connection part 144, so that the temperature difference among the first heat conduction part 141, the second heat conduction part 142 and the third heat conduction part 143 is effectively reduced, and thus the uniform heat dissipation of the battery module 20 is more effectively realized.

In an embodiment, as shown in fig. 1 and fig. 2, the first heat conduction portion 141 abuts against a center line of the battery module 20 along the length direction, so that heat generated at the middle of the battery module 20 can be more uniformly dissipated outwards through the first heat conduction portion 141, and the temperature difference between different portions of the battery module 20 is further reduced.

In one embodiment, the first heat conduction portion 141 is plural, the second heat conduction portion 142 is plural, and the third heat conduction portion 143 is plural. Through the above arrangement, the number of the first heat conduction portion 141, the second heat conduction portion 142, and the third heat conduction portion 143 can be adjusted according to the width of the battery module 20, so that the heat dissipation bracket 14 covers the battery module 20 between the first support beam 12 and the second support beam 13 as much as possible, thereby ensuring uniform heat dissipation of the battery module 20 and improving the heat dissipation performance of the battery pack.

In one embodiment, the plurality of heat dissipation brackets 14 are uniformly arranged along the length direction of the battery module 20, so that each part of the battery module 20 along the length direction can uniformly dissipate heat, thereby more effectively reducing the temperature difference between different parts of the battery module 20.

In an embodiment, the length of the heat dissipation bracket 14 is smaller than the length of the battery module 20, and the difference between the length of the battery module 20 and the length of the heat dissipation bracket 14 is greater than or equal to 60mm, so as to effectively ensure the heat conduction rate of the middle position of the battery module 20 and achieve uniform heat dissipation of the battery module 20, and when the difference between the length of the battery module 20 and the length of the heat dissipation bracket 14 is large, for example, the length of the battery module 20 is more than twice the length of the heat dissipation bracket 14, the heat dissipation of the battery module 20 can be performed by using the manner of arranging a plurality of heat dissipation brackets 14 in the foregoing embodiment, so as to ensure uniform heat dissipation of the battery module 20.

Alternatively, the first heat conduction portion 141 is a heat conduction beam, a heat conduction sheet, or a heat conduction block; the second heat conducting portion 142 is a heat conducting beam, a heat conducting fin or a heat conducting block; the third heat conduction portion 143 is a heat conduction beam, a heat conduction fin, or a heat conduction block.

In one embodiment, the width of the heat dissipation bracket 14 is one half of the distance between the first support beam 12 and the second support beam 13, the distance between the heat dissipation bracket 14 and the first support beam 12 is one quarter of the distance between the first support beam 12 and the second support beam 13, and the distance between the heat dissipation bracket 14 and the second support beam 13 is one quarter of the distance between the first support beam 12 and the second support beam 13. By adopting the above embodiment, the heat of the battery module 20 can be more uniformly dissipated, and the temperature difference between different parts of the battery module 20 can be further reduced.

Optionally, the heat sink bracket 14 is an aluminum bracket, a copper bracket, or a graphite bracket. In particular, the heat dissipation bracket 14 is preferably an aluminum bracket since the aluminum bracket has advantages of good heat conductivity, light weight, and low production cost.

Please combine fig. 5 and fig. 6 to show, under the same heat dissipation working condition and the same charge-discharge working condition of the battery module 20, the battery pack without the heat dissipation bracket 14 is compared with the battery pack provided by the embodiment of the present invention for surface temperature distribution simulation. The simulation conditions are as follows: the two battery packs naturally dissipate heat at normal temperature, the bottoms of the two battery packs adopt convection heat dissipation boundaries, the heat dissipation coefficient is 20w/m < 2 > 2K, and the average heat generation quantity of the battery module 20 is 10 w/cell.

As can be seen from fig. 5, the maximum temperature of the battery module 20 of the battery pack, in which the heat dissipation bracket 14 is not provided, is 328.35K at the middle of the battery module 20, the high temperature distribution is large, and the temperature difference at the top of the battery module 20 is about 7K, which is large.

It can be seen from fig. 6 that, the embodiment of the utility model provides a battery pack's battery module 20's the regional partial heat of high temperature can dispel the heat to the outside through heat dissipation support 14, and battery module 20's the highest temperature region removes to both sides, and the highest temperature value is about 325K, and the regional scope of high temperature reduces, and the difference in temperature at battery module 20's top is about 4K, and the difference in temperature obviously reduces, reaches the requirement that the battery module 20 difference in temperature is less than 5K.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a heat dissipation box for holding battery module, includes the bottom plate, and all set up in a first supporting beam and a second supporting beam on the bottom plate, its characterized in that: the heat dissipation box body further comprises a heat dissipation support arranged on the bottom plate and located between the first supporting beam and the second supporting beam, the first supporting beam, the second supporting beam and the heat dissipation support are suitable for being abutted to the bottom of the battery module when the heat dissipation box body accommodates the battery module, the heat dissipation support comprises a first heat conduction portion, a second heat conduction portion and a third heat conduction portion, the second heat conduction portion and the third heat conduction portion are arranged on the opposite sides of the first heat conduction portion respectively, the first heat conduction portion, the second heat conduction portion and the third heat conduction portion extend along the length direction of the battery module, and the length of the first heat conduction portion is larger than that of the second heat conduction portion and that of the third heat conduction portion.

2. The heat dissipation box of claim 1, wherein: the heat dissipation support further comprises a connecting portion, and the first heat conduction portion, the second heat conduction portion and the third heat conduction portion are connected into a whole through the connecting portion.

3. The heat dissipation box of claim 1, wherein: the first heat conducting part is abutted to the middle line position of the battery module along the length direction.

4. The heat dissipation box of claim 1, wherein: the first heat conduction part is a plurality of, and/or the second heat conduction part is a plurality of, and/or the third heat conduction part is a plurality of.

5. The heat dissipation box of claim 1, wherein: the heat dissipation support has a plurality ofly, and a plurality ofly the heat dissipation support is evenly arranged along the length direction of battery module.

6. The heat dissipating box of any one of claims 1 to 5, wherein: the first heat conducting part is a heat conducting beam, a heat conducting sheet or a heat conducting block; the second heat conducting part is a heat conducting beam, a heat conducting sheet or a heat conducting block; the third heat conduction part is a heat conduction beam, a heat conduction sheet or a heat conduction block.

7. The heat dissipating box of any one of claims 1 to 5, wherein: the length of the heat dissipation support is smaller than that of the battery module, and the difference between the length of the heat dissipation support and the length of the battery module is larger than or equal to 60 mm.

8. A battery pack, comprising: comprising a battery module and a heat-dissipating housing as claimed in any one of claims 1 to 7, the battery module being accommodated in the heat-dissipating housing.

9. The battery pack according to claim 8, wherein: the battery module comprises an electric core assembly and end plates respectively installed at two ends of the electric core assembly, wherein the end plates are connected with the first supporting beam and the second supporting beam through fasteners, and the electric core assembly is abutted to the heat dissipation support.

10. The battery pack according to claim 8, wherein: the first supporting beam and the second supporting beam are respectively abutted to the opposite sides of the bottom of the battery module, and the heat dissipation support is abutted to the middle of the bottom of the battery module.

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