CN218919158U

CN218919158U - Box body of battery pack, battery pack and vehicle

Info

Publication number: CN218919158U
Application number: CN202223217297.6U
Authority: CN
Inventors: 廉玉波; 马锐; 王伟强; 平朗; 罗贻利
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-25
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a box body of a battery pack, the battery pack and a vehicle, wherein the box body comprises: a frame, an upper cover and a bottom plate, the top and bottom of which are opened; the top of frame is located to the upper cover, and the bottom of frame is located to the bottom plate, and the space of placing that is used for placing battery module is limited between upper cover, frame and the bottom plate, and at least one of upper cover and the bottom plate is the heat transfer board subassembly, and the heat transfer board subassembly includes first plate body, second plate body, phase change material filling layer and covering, and the heat transfer runner that is used for circulating heat transfer medium is limited between first plate body and the second plate body, and the covering locate one side of first plate body that deviates from the second plate body and with the first plate body between define and hold the chamber, the phase change material filling layer set up in hold the chamber. According to the battery pack, the upper cover and/or the bottom plate in the box body of the battery pack integrate the functions of the supporting piece and the cooling piece of the battery module, and the cooling piece is not needed to be additionally arranged, so that parts in the battery pack are reduced, and the production cost of the battery pack is reduced.

Description

Box body of battery pack, battery pack and vehicle

Technical Field

The utility model relates to the field of vehicles, in particular to a box body of a battery pack, the battery pack and a vehicle.

Background

In the related art, the vehicle is provided with the battery package in order to supply energy to the electricity structure of vehicle, the inside electric core group that has of battery package, electric core group is provided with bearing structure all around in order to form the space that holds electric core group, electric core group still is provided with the cooling plate all around in order to heat exchange to electric core group, bearing structure and cooling plate structure are generally separated among the battery package among the prior art, need use the connecting piece to connect bearing structure and cooling plate structure, the part is many and weight is big in the battery package, battery package manufacturing cost is high.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to provide a case of a battery pack. According to the battery pack, the upper cover and/or the bottom plate in the box body of the battery pack integrate the functions of the supporting piece and the cooling piece of the battery module, and the cooling piece is not needed to be additionally arranged, so that parts in the battery pack are reduced, and the production cost of the battery pack is reduced.

The utility model further provides a battery pack with the box body.

The utility model further provides a vehicle with the battery pack.

The case of the battery pack according to the present utility model includes: a frame, the top and bottom of which are open; the upper cover is arranged at the top of the frame, the bottom plate is arranged at the bottom of the frame, a placing space for placing the battery module is defined between the upper cover, the frame and the bottom plate, at least one of the upper cover and the bottom plate is a heat exchange plate assembly, the heat exchange plate assembly comprises a first plate body, a second plate body, a phase change material filling layer and a covering piece, a heat exchange flow passage for circulating heat exchange media is defined between the first plate body and the second plate body, a containing cavity is defined between one side, away from the second plate body, of the first plate body and the first plate body, and the phase change material filling layer is arranged in the containing cavity.

According to the box body of the battery pack, at least one of the upper cover and the bottom plate is designed as the heat exchange plate assembly so as to realize the support of the battery module and cool the battery module, the upper cover and/or the bottom plate in the box body integrate the functions of the support piece and the cooling piece of the battery module, and the battery pack does not need to be additionally provided with the cooling piece, so that parts in the battery pack are reduced, the weight of the battery pack is reduced, and the production cost of the battery pack is reduced.

According to some embodiments of the utility model, the second plate is provided with a contact surface adapted to contact the battery module.

According to some embodiments of the utility model, the cover includes a third frame defining the receiving cavity therebetween.

According to some embodiments of the utility model, the battery module comprises a first battery module and a second battery module, the first plate body comprises a first area and a second area which are arranged at intervals, the first area is arranged corresponding to the first battery module, and the second area is arranged corresponding to the second battery module; the third frame body comprises a first subframe and a second subframe, the first subframe is arranged around a first area and is defined with the first plate body to form the accommodating cavity, and the second subframe is arranged around a second area and is defined with the first plate body to form the accommodating cavity.

According to some embodiments of the utility model, the first plate includes a first region disposed corresponding to the battery module, and the third frame is disposed around the first region.

According to some embodiments of the utility model, a portion of the first plate body protrudes away from the second plate body to form a protruding portion, and the second plate body is used for closing an opening of the protruding portion to form the heat exchange flow channel.

According to some embodiments of the utility model, the cover further comprises a fourth plate provided on a side of the third frame facing away from the first plate and covering the heat exchange flow channels and the third frame.

According to some embodiments of the utility model, the fourth plate and the protrusion are spaced apart to define a buffer chamber.

According to some embodiments of the utility model, the heat exchange flow channel is disposed in the receiving chamber.

A battery pack according to another embodiment of the present utility model is briefly described as follows.

The battery pack according to the present utility model includes: a case configured as the case of the battery pack according to any one of the above embodiments; the battery module comprises a plurality of single batteries, and the battery module is arranged in the placing space. Because the battery pack is provided with the box body of the embodiment, the battery pack does not need to be additionally provided with a cooling piece, parts in the battery pack are reduced, the weight of the battery pack is lightened, and the production cost of the battery pack is reduced.

According to some embodiments of the utility model, the heat exchange plate assembly is adhered to the battery module.

A vehicle according to another embodiment of the present utility model is briefly described below.

The vehicle according to the present utility model includes the battery pack according to any one of the above embodiments, and since the vehicle according to the present utility model is provided with the battery pack according to the above embodiment, the battery pack of the vehicle has higher energy density and has stronger cruising ability.

In summary, according to the case of the battery pack according to the present utility model, the upper cover and the bottom plate are designed as the heat exchange plate assembly to cool the battery module while supporting the battery module, and the upper cover and the bottom plate in the case integrate the supporting members and the cooling members of the battery module, so that the battery pack does not need to be additionally provided with the cooling members, parts in the battery pack are reduced, the weight of the battery pack is reduced, and the production cost of the battery pack is reduced.

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 foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a view illustrating an internal structure of a battery pack according to an embodiment of the present utility model.

Fig. 2 is a block diagram of a heat exchanger plate assembly according to an embodiment of the present utility model.

Fig. 3 is a partial construction view of a heat exchanger plate assembly according to an embodiment of the present utility model.

Fig. 4 is a cross-sectional view of a heat exchanger plate assembly according to an embodiment of the present utility model.

Fig. 5 is a cross-sectional view of a heat exchanger plate assembly according to further embodiments of the present utility model.

Reference numerals:

a single battery 1; a case 2; colloid 3; a heat exchange plate assembly 4; a car body carpet 5;

a fourth plate 20; a third frame 21; a first plate 22; a phase change material filling layer 23; a heat exchange flow passage 24; a second plate 25; a connector 26; a water pipe inlet 27; a water pipe outlet 28; a conduit 29.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The case 2 of the battery pack according to the embodiment of the present utility model is described below with reference to fig. 1 to 5.

As shown in fig. 1, a case 2 of a battery pack according to the present utility model includes: a frame, an upper cover and a bottom plate. The top and bottom of the frame are open; the upper cover is arranged at the top of the frame, the bottom plate is arranged at the bottom of the frame, a placing space for placing the battery module is defined among the upper cover, the frame and the bottom plate, at least one of the upper cover and the bottom plate is a heat exchange plate assembly 4, the heat exchange plate assembly 4 comprises a first plate body 22, a second plate body 25, a phase change material filling layer 23 and a covering piece, a heat exchange flow passage 24 for circulating heat exchange media is defined between the first plate body 22 and the second plate body 25, the covering piece is arranged at one side, away from the second plate body 25, of the first plate body 22, a containing cavity is defined between the covering piece and the first plate body 22, and the phase change material filling layer 23 is arranged in the containing cavity. Specifically, the upper cover, the frame and the bottom plate together define a placement space, the battery module is accommodated in the placement space, and at least one of the upper cover and the bottom plate is designed as the heat exchange plate assembly 4 to realize cooling of the battery module. The heat exchange plate assembly 4 is provided with a first plate body 22 and a second plate body 25, a heat exchange flow channel 24 is formed between the first plate body 22 and the second plate body 25, the covering piece and the first plate body 22 define a containing cavity, the containing cavity contains a phase change material filling layer 23, and the phase change material filling layer 23 has a certain heat preservation effect on the battery module, so that the battery module is prevented from being influenced by the ambient temperature, and the battery module is ensured to work normally. When the battery module works and heats, the battery module can exchange heat with the heat exchange medium in the heat exchange flow channel 24, meanwhile, heat generated by the battery module can be transferred to the phase change material filling layer 23 and absorbed by the phase change material filling layer 23, the battery module heats and possibly expands locally or moves when being collided, the heat exchange flow channel 24 can provide a certain buffer space for the battery module when the battery module expands locally or moves, the battery pack is prevented from being deformed greatly, and the use safety of the battery pack is ensured.

According to the box body 2 of the battery pack, at least one of the upper cover and the bottom plate is designed as the heat exchange plate assembly 4 so as to realize the support of the battery module and cool the battery module, the upper cover and/or the bottom plate in the box body 2 integrate the supporting piece and the cooling piece of the battery module, and the battery pack does not need to be additionally provided with the cooling piece, so that parts in the battery pack are reduced, the weight of the battery pack is reduced, and the production cost of the battery pack is reduced.

According to some embodiments of the present utility model, the second plate 25 is provided with a contact surface adapted to contact the battery module. Specifically, the second plate 25 in the heat exchange plate assembly 4 is disposed towards the battery module and is formed with a contact surface suitable for contacting with the battery module, the second plate 25 and the first plate 22 are fixed to define a heat exchange flow channel 24 with the first plate 22, and when the battery module works and heats, the battery module can exchange heat with the heat exchange medium in the heat exchange flow channel 24 to realize cooling of the battery module. In some embodiments, as shown in fig. 4 to 5, the second plate 25 is positioned at one side of the first plate 22 facing the center of the placement space, the center of the placement space is provided with the battery module, and the contact surface of the second plate 25 is disposed facing the battery module.

In some embodiments, the second plate 25 is in a flat plate structure, one side of the second plate 25 facing the battery module is coated with a heat conductive gel 3 to be connected with the battery module, at least part of the first plate 22 is spaced from the second plate 25 so as to provide the heat exchanging channels 24, and edges of the first plate 22 and the second plate 25 are sealed and fixed by gluing or welding.

According to some embodiments of the utility model, as shown in fig. 2, the cover comprises a third frame 21, and a receiving cavity is defined between the third frame 21 and the first plate 22. Specifically, the third frame body 21 is covered outside the phase change material filling layer 23, the third frame body 21 can fixedly mount the phase change material filling layer 23, the torsional rigidity of the whole heat exchange plate assembly 4 can be improved, a containing cavity is defined between the third frame body 21 and the first plate body 22, the containing cavity is a gap between the whole covering piece and the first plate body 22, the containing cavity can slow down the mechanical impact of the first plate body 22 from the outside, the impact on a battery module is reduced, and the use safety of the battery pack is ensured.

According to some embodiments of the present utility model, as shown in fig. 2, the battery module includes a first battery module and a second battery module, the first plate 22 includes a first region and a second region disposed at intervals, the first region is disposed corresponding to the first battery module, and the second region is disposed corresponding to the second battery module; the third frame 21 includes a first sub-frame disposed around the first region and defining a receiving chamber with the first plate 22, and a second sub-frame disposed around the second region and defining a receiving chamber with the first plate 22. Specifically, in some embodiments, the third frame 21 is formed by a surrounding frame and connecting portions disposed in the frame and connected to opposite sides of the frame, where the connecting portions and one side of the frame form a first subframe together, and the connecting portions and the other side of the frame form a second subframe together. The heat exchange plate assembly 4 comprises a first plate body 22 and a third frame body 21, wherein the third frame body 21 is arranged on one side, away from the second plate body 25, of the first plate body 22 and jointly defines a containing cavity with the first plate body 22, the first plate body 22 comprises a first area and a second area which are arranged at intervals, a first subframe of the third frame body 21 can be arranged around the first area and defines the containing cavity with the first area, a second subframe can be arranged around the second area and defines the containing cavity with the second area, and a phase change material filling layer 23 can be arranged in the containing cavity to realize heat preservation and heat exchange of the first battery module and the second battery module and ensure the use safety of the battery pack.

In some embodiments, the accommodating cavity is correspondingly provided with a part of heat exchange flow channel 24 and a part of phase change material filling layer 23 arranged around the heat exchange flow channel 24, at least part of the phase change material filling layer 23 is opposite to the connecting part so as to realize cooling of electrode terminals at two sides of the connecting part, and in order to realize heat exchange between the heat exchange plate assembly 4 and the battery module, the accommodating cavity corresponds to at least part of the heat exchange flow channel 24 and at least part of the phase change material filling layer 23. It should be noted that, the end of each single battery of the battery module is provided with an electrode terminal, in the working process of the battery module, the heating value of the electrode terminal is larger than that of the rest, the phase change material filling layer 23 is arranged around the heat exchange flow channel 24 at least partially, so that the phase change material filling layer 23 and the electrode terminal are opposite, the phase change material filling layer 23 and the connecting part are opposite, the phase change material filling layer 23 and the electrode terminals on two sides of the connecting part are opposite, heat exchange at the electrode terminal is realized, and the heat exchange effect between the heat exchange plate assembly 4 and the battery module is enhanced.

According to some embodiments of the present utility model, the first plate 22 includes a first region disposed corresponding to the battery module, and the third frame 21 is disposed around the first region. Specifically, the third frame 21 is configured as an annular frame, the third frame 21 is disposed on one side of the first plate 22 and is attached to the edge of the first area of the first plate 22, at this time, the third frame 21 and the first area together form a filling space, and the filling space can be filled with a phase change material filling layer 23, so as to realize heat preservation and heat exchange of the battery module located in the first area, and ensure use safety of the battery pack.

According to some embodiments of the present utility model, as shown in fig. 4 to 5, a portion of the first plate 22 protrudes toward a direction away from the second plate 25 to form a protrusion, and the second plate 25 serves to close an open mouth of the protrusion to form the heat exchange flow passage 24. Specifically, at least part of the first plate 22 is far away from the second plate 25 to form a gap with the second plate 25, and the gap is a heat exchange flow channel 24, and the heat exchange flow channels 24 can be multiple, each heat exchange flow channel 24 can be filled with a heat exchange medium, and the heat exchange medium can exchange heat with the battery module when the battery module heats, so that the battery module is cooled or heated. In some embodiments, the heat exchange flow channels 24 may be punched or milled on the side of the protrusions facing the second plate body 25.

In some embodiments, the interior of the accommodating cavity can be pumped to negative pressure, so that the air in the accommodating cavity is divided into a plurality of parts by the heat exchange flow channels 24 in the accommodating cavity, and each part of air is positioned in a different heat exchange flow channel 24, so that the air convection in the accommodating cavity can be reduced, a certain heat preservation effect is achieved, the battery module is ensured to be in a proper working environment, the electric quantity of the battery module is ensured to be free from environmental influence, and the service life of the battery module is ensured.

According to some embodiments of the present utility model, as shown in fig. 4-5, the cover further comprises a fourth plate 20, the fourth plate 20 being provided on a side of the third frame 21 facing away from the first plate 22 and covering the heat exchange flow channels 24 and the third frame 21. Specifically, the phase change material filling layer 23 is covered with a third frame 21, the fourth plate 20 is disposed on one side of the third frame 21 facing away from the first plate 22, a containing cavity is defined between the third frame 21 and the first plate 22, and the fourth plate 20 can cover an open end of the containing cavity after being matched with the third frame 21. In some embodiments, the fourth plate 20 is fixedly connected with the third frame 21 by bonding or welding to form a covering member, the accommodating cavity is a gap between the whole covering member and the first plate 22, and the accommodating cavity can slow down the mechanical impact of the first plate 22 from the outside, alleviate the impact on the battery module, and ensure the use safety of the battery pack.

According to some embodiments of the present utility model, the fourth plate 20 is spaced from the projections to define a buffer chamber. Specifically, the fourth plate 20 may be disposed opposite to the heat exchange flow channel 24, and the buffer cavity is defined between the protruding portions of the fourth plate 20 and the first plate 22, so as to avoid extrusion of the battery module when the battery pack is mechanically collided, and play a role in preventing collision. In some embodiments, the heat exchange flow channel 24 is obtained by punching or milling the side of the protruding part facing the second plate body 25, at least part of the protruding part facing the covering part is configured as a groove in the buffer cavity, and the groove can be filled with a phase change material to cover a position with large heat productivity of the battery module so as to absorb heat of the battery module, and the phase change material can also be used as a heat insulation material of the battery module to ensure that the battery module is at a proper working temperature and further ensure the service life of the battery module.

According to some embodiments of the present utility model, as shown in fig. 4-5, the heat exchange flow channel 24 is disposed in the accommodating cavity, a void cavity is formed between the accommodating cavity and the heat exchange flow channel 24, the phase change material filling layer 23 is disposed in the void cavity, the heat exchange medium flows through the heat exchange flow channel 24, in some embodiments, the heat exchange flow channel 24 is formed on a side cavity wall of the accommodating cavity, the side cavity wall formed with the heat exchange flow channel 24 and other cavity walls of the accommodating cavity are disposed at intervals and form a void cavity, and the heat exchange effect of the heat exchange plate assembly 4 on the battery module can be enhanced by filling the phase change material filling layer 23 in the void cavity.

In some embodiments, a part of the phase change material filling layer 23 is disposed around the heat exchange flow channel 24, a part of the phase change material filling layer 23 is disposed corresponding to the middle of the placement space, and a part of the phase change material filling layer 23 is disposed corresponding to the middle of the placement space to cover a position where the heat generation amount of the battery module is large, thereby radiating heat from the battery module and serving as a heat insulation material of the battery module. The heat exchange medium is combined with the phase change material to realize better combined heat exchange effect of the phase change material than single heat exchange medium or phase change material, so that the problem of poor heat conducting property of the phase change material can be solved, meanwhile, the defect of high density and high cost of the phase change material can be avoided by combined heat exchange, the material cost is effectively reduced, and the weight and the volume of the battery pack are reduced.

In some embodiments, the phase change material may use industrial paraffin whose matrix is expanded graphite, voids in the expanded graphite may prevent paraffin leakage after melting, and may increase the thermal conductivity of the entire phase change material.

In some embodiments of the present utility model, the case 2 of the battery pack includes a ring-shaped frame, an upper cover, and a bottom plate. The upper cover, the frame and the bottom plate together define a placing space, the battery module is accommodated in the placing space, the battery module can be fixed with the frame in a gluing, buckling, screwing and other modes, the upper side and the lower side of the battery module are coated with heat-conducting colloid 3 and are connected with the upper cover and the bottom plate which are constructed as heat exchange plate assemblies 4, and the upper cover and the bottom plate can be installed in a screwing, welding, clamping or bonding mode and other modes. The heat exchange plate assembly 4 arranged adjacent to the passenger cabin lays a car body carpet 5 towards one side of the passenger cabin, the other side is communicated with the outside, the heat exchange plate assembly 4 can be used as a sealing part of the battery module and also can be used as a protecting part of the battery module, and the battery pack is prevented from being damaged when external water vapor and dust enter the battery module and the battery pack is prevented from being impacted by the outside. The heat exchange plate assembly 4 comprises a first plate body 22, a second plate body 25, a phase change material filling layer 23, a third frame body 21 and a fourth plate body 20, wherein a heat exchange flow channel 24 for circulating a heat exchange medium is defined between the first plate body 22 and the second plate body 25, the middle part of the first plate body 22 protrudes towards the direction far away from the second plate body 25 and forms a protruding part, the heat exchange flow channel 24 can be obtained by punching or milling the protruding part towards one side of the second plate body 25, and the edges of the first plate body 22 and the second plate body 25 are sealed and fixed by gluing and welding; the third frame 21 is spaced from the protruding portion of the first plate 22, the fourth plate 20 is located on one side of the third frame 21 away from the first plate 22 and is fixedly connected with the third frame 21 through bonding or welding, a containing cavity is defined between the third frame 21 and the first plate 22, the phase change material filling layer 23 is located in the containing cavity, the protruding portion faces one side of the fourth plate 20 to be spaced to define a buffer cavity, a gully is formed in the buffer cavity, and the phase change material can be filled in the gully.

The first plate 22 is connected with a pipeline 29 through welding, the pipeline 29 is communicated with the heat exchange flow channel 24, the other end of the pipeline 29 is connected with a connector 26, and a water pipe inlet 27 and a water pipe outlet 28 of the connector 26 are communicated with the pipeline 29. The external of the inlet and outlet of the connector 26 can be connected with a water pump to form an internal circulation loop, and the heat exchange medium flowing in the heat exchange flow channel 24 can be water, glycol solution or refrigerant, etc. When the battery module has a cooling requirement, the phase change material filling layer 23 begins to melt and absorb heat when reaching the phase change temperature, and a heat exchange medium enters from the water pipe inlet 27 and then flows out from the water pipe outlet 28, so that heat generated by the battery module can be taken away; when the battery module has a heating requirement, the heat exchange medium flows in from the water pipe outlet 28 and then flows out from the water pipe inlet, so that the battery module is heated.

The upper cover and the bottom plate in the box body 2 of the battery pack designed according to the utility model have the function of cooling parts, so that the parts in the battery pack are reduced, and the production cost of the battery pack is reduced.

The battery pack according to the present utility model is briefly described as follows.

As shown in fig. 1, a battery pack according to the present utility model includes: a case 2 and a battery module, the case 2 being configured as the case 2 of the battery pack according to any one of the above embodiments; the battery module comprises a plurality of single batteries 1, and the battery module is arranged in the placing space. The box body 2 is internally provided with a placing space, and a plurality of single batteries 1 are arranged in the placing space, so that the battery pack does not need to be additionally provided with a cooling piece due to the fact that the battery pack is provided with the box body 2 of the embodiment, parts in the battery pack are reduced, the weight of the battery pack is lightened, and the production cost of the battery pack is reduced.

According to some embodiments of the present utility model, as shown in fig. 1, the heat exchange plate assembly 4 is attached to the battery module. Specifically, in some embodiments, the upper and lower sides of the battery module are coated with the heat-conducting colloid 3 to be connected with the heat-exchanging plate assembly 4, the heat-conducting colloid 3 can play a role in mechanical connection and heat conduction, so that the connection between the battery module and the heat-exchanging plate assembly 4 meets a certain mechanical strength and heat conduction performance, and the heat-exchanging plate assembly 4 can be mounted with the box body 2 in a threaded connection, welding, clamping or bonding mode.

The vehicle according to the present utility model is briefly described below.

In summary, the case 2 of the battery pack according to the present utility model is designed as the heat exchange plate assembly 4 to cool the battery module while supporting the battery module, and the upper cover and the bottom plate in the case 2 integrate the supporting members and the cooling members of the battery module, so that the battery pack does not need to be additionally provided with cooling members, the parts in the battery pack are reduced, the weight of the battery pack is reduced, and the production cost of the battery pack is reduced.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Although embodiments of the present utility model have been shown and described above, variations, modifications, substitutions and alterations are possible to the above embodiments.

Claims

1. A case of a battery pack, the case comprising:

a frame, the top and bottom of which are open;

the upper cover is arranged at the top of the frame, the bottom plate is arranged at the bottom of the frame, a placing space for placing the battery module is defined between the upper cover, the frame and the bottom plate, at least one of the upper cover and the bottom plate is a heat exchange plate assembly (4), the heat exchange plate assembly (4) comprises a first plate body (22), a second plate body (25), a phase change material filling layer (23) and a covering piece, a heat exchange flow channel (24) for circulating heat exchange media is defined between the first plate body (22) and the second plate body (25), a containing cavity is defined between one side, away from the second plate body (25), of the first plate body (22) and the first plate body (22), and the phase change material filling layer (23) is arranged in the containing cavity.

2. The case of a battery pack according to claim 1, wherein the second plate (25) is provided with a contact surface adapted to contact the battery module.

3. The case of a battery pack according to claim 2, wherein the cover includes a third frame (21), the third frame (21) and the first plate (22) defining the accommodation chamber therebetween.

4. The battery pack case according to claim 3, wherein the battery module includes a first battery module and a second battery module, the first plate (22) includes a first region and a second region that are disposed at intervals, the first region being disposed corresponding to the first battery module, and the second region being disposed corresponding to the second battery module;

the third frame body (21) comprises a first subframe and a second subframe, the first subframe is arranged around a first area and is defined with the first plate body (22) to form the accommodating cavity, and the second subframe is arranged around a second area and is defined with the first plate body (22) to form the accommodating cavity.

5. A case of a battery pack according to claim 3, wherein the first plate (22) includes a first region provided corresponding to the battery module, and the third frame (21) is provided around the first region.

6. The case of a battery pack according to any one of claims 3 to 5, wherein a portion of the first plate body (22) protrudes in a direction away from the second plate body (25) to form a protruding portion, and the second plate body (25) is for closing an open mouth of the protruding portion to form the heat exchange flow passage (24).

7. The case of a battery pack according to claim 6, wherein the cover further comprises a fourth plate body (20), the fourth plate body (20) being provided on a side of the third frame body (21) facing away from the first plate body (22) and covering the heat exchanging flow passage (24) and the third frame body (21).

8. The battery pack case according to claim 7, wherein the fourth plate (20) and the protrusion are spaced apart to define a buffer chamber.

9. The battery pack case according to claim 6, wherein the heat exchange flow passage (24) is provided in the accommodating chamber.

10. A battery pack, comprising:

a case configured as the case of the battery pack according to any one of claims 1 to 9;

the battery module comprises a plurality of single batteries, and the battery module is arranged in the placing space.

11. The battery pack according to claim 10, wherein the heat exchange plate assembly (4) is attached to the battery module.

12. A vehicle characterized by comprising a battery pack according to any one of claims 10-11.