CN219350395U - Power battery pack and electric automobile - Google Patents

Abstract

The application provides a power battery package and electric automobile, wherein, power battery package includes: an upper case and a lower case detachably connected, and a plurality of battery modules disposed on an inner bottom surface of the lower case; the upper housing and/or the lower housing are formed in a hollow structure; further comprises: at least one thermally conductive patch; wherein, a plurality of battery modules interval is preset the interval and is set up side by side, and the heat conduction paster sets up between adjacent battery modules, and the heat conduction paster includes cooling channel and heating channel. According to the embodiment, the upper shell and/or the lower shell are/is arranged to be of a hollow structure, and the heat conduction patch with the cooling channels and the heating channels is arranged among the multiple rows of battery modules, so that the influence of the external environment temperature on the power battery pack can be reduced, meanwhile, the power battery pack can be adaptively heated or cooled according to the current battery temperature, the use safety and the use capacity of the power battery are ensured, and the driving mileage of a vehicle is ensured. Meanwhile, the structure is simple, and the device is convenient to realize and apply on the power battery pack.

Description

Power battery pack and electric automobile

Technical Field

The application relates to the technical field of batteries, in particular to a power battery pack and an electric automobile.

Background

One of the key assemblies of electric automobiles is a power battery, and the most commonly used type of power battery at present is a vehicle-mounted power battery pack which is formed by appropriately grouping battery cells of single lithium ion batteries and then integrating the battery cells into a box body. However, due to the characteristics of the lithium battery, the electric quantity is easy to be seriously attenuated in a low-temperature environment in winter, and the endurance mileage is reduced by about 30% -50%, so that the battery pack is required to be heated; when the battery is used at high temperature in summer, the battery generates heat, and heat dissipation is needed for safety. How to keep the use environment of the power battery within a certain temperature range is a key technology for developing electric vehicles, at present, a large number of patent applications related to temperature control technology of the power battery exist, but the technology is complex or consideration factors are not comprehensive, and the power battery pack with the temperature control technology is not practically applied to the electric vehicles, so that the power battery pack with the temperature control technology has the advantages of simple structure and strong practicability, and at least partially solves the problems existing in the power batteries of the existing electric vehicles.

Disclosure of Invention

The technical aim to be achieved by the embodiment of the application is to provide a power battery pack and an electric automobile, which are used for solving the problems that the temperature control structure of the power battery pack of the current electric automobile is complex and difficult to realize.

To solve the above technical problem, an embodiment of the present application provides a power battery pack, including: an upper case and a lower case detachably connected, and a plurality of battery modules disposed on an inner bottom surface of the lower case; the upper case and/or the lower case is formed in a hollow structure;

the power battery pack further includes: at least one thermally conductive patch;

the battery modules are arranged side by side at intervals of preset intervals, the heat conducting patches are arranged between the adjacent battery modules, and the heat conducting patches comprise cooling channels and heating channels.

Specifically, in the power battery pack, the number of the heat conducting patches is a plurality, and the plurality of the heat conducting patches are arranged side by side or stacked;

the cooling channels and the heating channels of the heat conduction patches are respectively and correspondingly connected in series;

the cooling channels and the heating channels of the plurality of heat conducting patches which are arranged in a stacked mode are respectively connected in parallel or in series correspondingly.

Specifically, as described above in the power battery pack, the heat conductive patches are arranged in an arcuate shape between the plurality of battery modules.

Further, as described above, the power battery pack, the heat conductive patch includes: at least two pipes and a heat-conducting insulating material coating the at least two pipes;

wherein at least one of the pipes constitutes the cooling channel and at least one of the pipes constitutes the heating channel.

Specifically, the power battery pack as described above, the hollow structure includes: the outer shell body and the inner shell body, and reinforcing ribs are uniformly distributed between the outer shell body and the inner shell body.

Specifically, as described above for the power cell pack, an insulating aerogel is poured between the outer case and the inner case.

Optionally, as described above, the outer case and the inner case are integrally formed structures, respectively, and are fixedly connected by extrusion.

Specifically, as described above, the upper housing and/or the lower housing are provided with a heat-conducting patch interface for communicating the inside and the outside;

the cooling channel is communicated with an external cooling pipeline through the heat conduction patch interface;

the heating channel is communicated with an external heating pipeline through the heat conduction patch interface.

Specifically, as described above, the battery module is fixed to the lower case by glue poured into the lower case.

Another embodiment of the present application provides an electric vehicle, including: the power battery pack as described above. Compared with the prior art, the power battery pack and the electric automobile provided by the embodiment of the application have the following beneficial effects:

according to the embodiment, the upper shell and/or the lower shell are/is arranged to be of a hollow structure, and the heat conduction patch with the cooling channels and the heating channels is arranged among the multiple rows of battery modules, so that the power battery pack can be affected by the external environment temperature, meanwhile, the power battery pack can be heated or cooled adaptively according to the current battery temperature, the battery pack can be ensured to work in a normal temperature range, the use safety and the use capacity of the power battery are ensured, and the driving mileage of a vehicle is ensured. Meanwhile, the structure of the embodiment is simple, so that the embodiment is convenient to realize and apply on the power battery pack.

Drawings

Fig. 1 is a schematic structural view of a power battery pack of the present application;

FIG. 2 is a partial cross-sectional view of a hollow structure of the present application;

fig. 3 is a schematic cross-sectional view of a thermally conductive patch of the present application.

[ reference numerals description ]

1. A hollow structure; 101. an inner housing; 102. an outer housing; 103. reinforcing ribs; 104. a thermally insulating aerogel; 105. a thermally conductive patch interface; 2. a thermally conductive patch; 201. a pipe; 202. a thermally conductive insulating material; 3. and a battery module.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present application more apparent, the following detailed description will be given with reference to the accompanying drawings and the specific embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the present application. It will therefore be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present application, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the examples provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

Referring to fig. 1, an embodiment of the present application provides a power battery pack, including: an upper case and a lower case detachably connected, and a plurality of battery modules 3 disposed on an inner bottom surface of the lower case; the upper housing and/or the lower housing is formed as a hollow structure 1;

the power battery pack further includes: at least one thermally conductive patch 2;

the battery modules 3 are arranged side by side at preset intervals, the heat conducting patches 2 are arranged between the adjacent battery modules 3, and the heat conducting patches 2 comprise cooling channels and heating channels.

In the embodiment, the upper shell and/or the lower shell of the power battery pack are/is formed into the hollow structure 1, so that the influence of the external environment temperature on the battery module 3 in the power battery pack is reduced; in addition, at least one heat conducting patch 2 for controlling the temperature of the battery modules 3 is further arranged in the power battery pack, wherein the heat conducting patch 2 is arranged between a plurality of battery modules 3 arranged side by side, more specifically between adjacent battery modules 3, so that the heat conducting patch 2 can be in contact with the adjacent battery modules 3, and heat exchange efficiency is improved. Specifically, the heat conduction patch 2 comprises a cooling channel and a heating channel, wherein the battery module 3 can be cooled through the cooling channel so as to avoid the safety risk caused by overhigh temperature in the power battery pack, and the battery module 3 can be cooled and heated through the heating channel so as to avoid the electric quantity of the power battery pack and the cruising mileage of the vehicle, which are reduced by overhigh temperature.

To sum up, this embodiment sets up to hollow structure 1 through going up casing and/or lower casing, and set up the heat conduction paster 2 that has cooling channel and heating channel between multirow battery module 3 for power battery package can reduce the influence that receives external environment temperature, can carry out adaptive heating or cooling according to current battery temperature simultaneously, in order to guarantee battery package work in normal temperature range, guarantees power battery's safety in utilization, use capacity, and guarantees the mileage of vehicle. Meanwhile, the structure of the embodiment is simple, so that the embodiment is convenient to realize and apply on the power battery pack.

It should be noted that, each battery module 3 includes a plurality of battery modules, each battery module includes a plurality of unit cells, and the cells in each battery module 3 are electrically connected in parallel or in series. It should be noted that, the whole or part of the heat-conducting patch 2 may also be adjacent to only one battery module 3, i.e., disposed between the battery module 3 and the side walls of the upper case and/or the lower case. Since the lower case mainly corresponds to the battery module 3, in one embodiment, the lower case is formed as a hollow structure 1, and the upper case may or may not be the hollow structure 1.

Referring to fig. 1, in particular, in the power battery pack as described above, the number of the heat-conducting patches 2 is plural, and the plural heat-conducting patches 2 are arranged side by side or stacked;

wherein the cooling channels and the heating channels of the heat conducting patches 2 arranged side by side are respectively and correspondingly connected in series;

the cooling channels and the heating channels of the plurality of heat-conducting patches 2 which are arranged in a stacked manner are respectively correspondingly connected in parallel or in series.

In a specific embodiment, when the number of the heat-conducting patches 2 is plural, the plural heat-conducting patches 2 may be arranged side by side or stacked;

in an embodiment, a heat conducting patch 2 is disposed between every two adjacent battery modules 3, and at this time, between the plurality of battery modules 3, the plurality of heat conducting patches 2 are disposed side by side, so that the heat conducting patches 2 are in a straight strip shape, which is convenient for production and installation. Alternatively, there may be no association between the heat-conducting patches 2, that is, each heat-conducting patch 2 is correspondingly connected to the external cooling pipe and the external heating pipe, respectively; optionally, each heat-conducting patch 2 may have a certain association, for example, the cooling channel and the heating channel of each heat-conducting patch 2 are respectively and correspondingly connected in series, and two ends of each heat-conducting patch are respectively connected with an external cooling pipeline and an external heating pipeline, so that the cooling liquid or the heated medium sequentially passes through each heat-conducting patch 2, which is beneficial to improving the utilization rate of the cooling liquid and the heated medium, and reducing the connection with the external cooling pipeline and the external heating pipeline.

In another embodiment, each heat conducting patch 2 is arranged between the plurality of battery modules 3 in a penetrating manner, at this time, the heat conducting patches 2 are arranged in an arch shape between the plurality of battery modules 3, and the plurality of heat conducting patches 2 are stacked in the vertical direction, so that the heat conducting patches 2 are fully contacted with the battery modules 3 in height, thereby improving heat exchange efficiency. Specifically, the number of the heat-conducting patches 2 at this time is determined according to the first width of the heat-conducting patches 2 and the first height of the battery module 3, wherein the first height is equal to or greater than the product of the first width and the number.

In another embodiment, a plurality of stacked heat-conducting patches 2 are arranged between every two adjacent battery modules 3, and a plurality of stacked heat-conducting patches 2 are arranged side by side between the plurality of battery modules 3. Alternatively, there may be no association between the groups of heat-conducting patches 2, i.e. each heat-conducting patch 2 is connected to the external cooling pipe and the external heating pipe, respectively; optionally, a certain association may be provided between each group of the heat-conducting patches 2, for example, the cooling channels and the heating channels of each heat-conducting patch 2 of each layer are respectively connected in series correspondingly, and the cooling channels and the heating channels at the head and the tail are respectively connected with the external cooling channels and the heating channels, or the cooling channels and the heating channels at the head and the tail are respectively connected with the external cooling channels and the heating channels after being correspondingly connected in parallel correspondingly; for example, the cooling channels and the heating channels in the stacked heat-conducting patches 2 are respectively connected in series or in parallel, the cooling channels and the heating channels after the heat-conducting patches 2 are connected in series or in parallel are respectively connected in series or in parallel with the cooling channels and the heating channels after the heat-conducting patches 2 are connected in series or in parallel, and the cooling channels and the heating channels at the head end and the tail end are respectively connected in series or in parallel with the external cooling channels and the external heating channels.

The cooling channels and the heating channels are connected in series or in parallel, preferably in an integrally formed manner, so as to reduce the number of joints. In the case of failure to form one piece, a connection with good sealing effect, such as an interference fit or the addition of a sealing structure, is preferred.

Referring to fig. 3, further, the power battery pack as described above, the heat-conducting patch 2 includes: at least two pipes 201 and a heat conductive insulating material 202 coating the at least two pipes 201;

wherein at least one of the pipes 201 constitutes the cooling channel and at least one of the pipes 201 constitutes the heating channel.

In a specific embodiment, the heat conducting patch 2 includes at least two pipes 201, wherein the number of pipes 201 corresponding to the cooling channel and the heating channel is determined according to the temperature control requirement, and the number of pipes 201 corresponding to each channel is at least one, so as to ensure implementation of the cooling function and the heating function.

The outside of at least two pipes 201 is coated with a thermally conductive and insulating material 202, such as: the heat-conducting silica gel sheet can maintain the space structure between the pipelines 201 through the heat-conducting insulating material 202, ensure heat exchange efficiency, and avoid the influence on the power supply of the battery module 3 because the pipelines 201 are made of the electric-conducting material. In a specific embodiment, the pipe 201 is preferably made of a metal material with good thermal conductivity, and the cross section of the pipe 201 includes, but is not limited to, a circle, a rectangle, other polygons, etc., preferably, the pipe 201 is a square pipe made of copper, which is beneficial to ensuring the space structure between the pipes 201, avoiding the conditions of good winding, dislocation, etc., and simultaneously, being beneficial to improving the indirect contact area between the pipe 201 and the battery module 3, thereby improving the heat exchange efficiency.

Referring to fig. 2, in particular, the power battery pack as described above, the hollow structure 1 includes: the outer shell 102 and the inner shell 101, and reinforcing ribs 103 are uniformly distributed between the outer shell 102 and the inner shell 101.

In a specific embodiment, the hollow structure 1 is composed of an outer shell 102 and an inner shell 101, wherein the outer shell 102 and the inner shell 101 are hollow, and reinforcing ribs 103 are uniformly distributed between the outer shell 102 and the inner shell 101 and used for ensuring the connection strength between the outer shell 102 and the inner shell 101 and avoiding the inner shell 101 from sinking.

Referring to fig. 2, in particular, the power cell pack as described above, an insulating aerogel 104 is poured between the outer housing 102 and the inner housing 101.

Further, in another embodiment, an insulating aerogel 104 is further poured between the outer housing 102 and the inner housing 101 to increase the insulation of the hollow structure 1 from the outside environment.

Alternatively, as described above, the outer case 102 and the inner case 101 are integrally formed and fixedly connected by extrusion.

In an embodiment, the housing of the power battery pack may be made of a light metal material, such as a high-strength aluminum alloy, or may be made of a composite material such as sheet-shaped molded glass fiber reinforced plastic, so as to ensure the production, sealing effect and heat insulation effect of the hollow structure 1, the specific structure of the hollow structure 1 is exemplified by the high-strength aluminum alloy material, wherein the outer housing 102 and the inner housing 101 are obtained by die casting, etc., respectively, and the extruded outer housing 102 and the inner housing 101 are fixed by extrusion combination. Wherein all or part of the ribs 103 may also be die cast onto the outer housing 102 and/or the inner housing 101.

Referring to fig. 1, in particular, the power battery pack as described above, the upper case and/or the lower case is provided with a heat conductive patch interface 105 communicating the inside and the outside;

wherein the cooling channel is communicated with an external cooling pipeline through the heat conducting patch interface 105;

the heating channel is connected with an external heating pipeline through the heat conducting patch interface 105.

In a specific embodiment, the upper and/or lower cases are provided with heat-conducting patch interfaces 105 communicating the inside and the outside, and alternatively, the heat-conducting patch interfaces 105 may be provided with only one through hole, so that both the cooling channel and the heating channel are connected with the external corresponding cooling channel or heating channel through the through holes, so that the cooling liquid and the heating medium enter the corresponding cooling channel or heating channel, thereby cooling or heating the battery module 3.

Optionally, the heat conducting patch interface 105 may further be provided with two through holes, where the two through holes are respectively connected to the cooling channel and the heating channel; further, when the cooling channel and the heating channel respectively correspond to one pipe 201, at least two through holes may be further disposed on the heat conducting patch interface 105, where each through hole is respectively connected to one cooling channel or one heating channel.

Specifically, in the power battery pack as described above, the battery module 3 is fixed to the lower case by glue poured into the lower case.

In an embodiment, to ensure the stability of the installation of the battery module 3, the battery module 3 is fixed to the lower case by glue poured into the clamping groove of the battery module 3. Wherein the glue is preferably polyurethane glue.

In a specific embodiment, a clamping groove corresponding to the battery module 3 is further formed on the bottom surface of the lower housing, so that the battery module 3 is positioned when being placed, and meanwhile, the movement of the battery module 3 is limited. And after the battery module 3 is placed, further fixation is performed by pouring glue.

Optionally, the poured glue needs to reach a preset height, for example: 2 cm.

Another embodiment of the present application provides an electric vehicle, including: the power battery pack as described above.

Furthermore, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion.

While the foregoing is directed to the preferred embodiments of the present application, it should be noted that modifications and adaptations to those embodiments may occur to one skilled in the art and that such modifications and adaptations are intended to be comprehended within the scope of the present application without departing from the principles set forth herein.

Claims (10)

1. A power battery pack comprising: an upper case and a lower case detachably connected, and a plurality of battery modules (3) disposed on an inner bottom surface of the lower case; characterized in that the upper housing and/or the lower housing is formed as a hollow structure (1);

the power battery pack further includes: at least one thermally conductive patch (2);

the battery modules (3) are arranged side by side at preset intervals, the heat conducting patches (2) are arranged between the adjacent battery modules (3), and the heat conducting patches (2) comprise cooling channels and heating channels.

2. The power battery pack according to claim 1, wherein the number of the heat conductive patches (2) is plural, and a plurality of the heat conductive patches (2) are arranged side by side or stacked;

wherein the cooling channels and the heating channels of the heat conduction patches (2) which are arranged side by side are respectively and correspondingly connected in series;

the cooling channels and the heating channels of the plurality of heat conduction patches (2) which are arranged in a stacked mode are respectively connected in parallel or in series correspondingly.

3. The power battery pack according to claim 1 or 2, wherein the heat conductive patches (2) are arranged in an arcuate shape between a plurality of the battery modules (3).

4. The power cell pack according to claim 1 or 2, wherein the thermally conductive patch (2) comprises: at least two pipes (201), and a heat-conductive insulating material (202) coating the at least two pipes (201);

wherein at least one of the pipes (201) constitutes the cooling channel and at least one of the pipes (201) constitutes the heating channel.

5. The power cell pack according to claim 1, wherein the hollow structure (1) comprises: the novel reinforced concrete structure comprises an outer shell (102) and an inner shell (101), wherein reinforcing ribs (103) are uniformly distributed between the outer shell (102) and the inner shell (101).

6. The power cell pack of claim 5, wherein an insulating aerogel (104) is poured between the outer housing (102) and the inner housing (101).

7. The power battery pack according to claim 5, wherein the outer case (102) and the inner case (101) are integrally formed structures, respectively, and are fixedly connected by extrusion.

8. The power battery pack according to claim 1, wherein a heat conducting patch interface (105) for communicating the inside and the outside is provided on the upper case and/or the lower case;

wherein the cooling channel is communicated with an external cooling pipeline through the heat conducting patch interface (105);

the heating channel is communicated with an external heating pipeline through the heat conduction patch interface (105).

9. The power battery pack according to claim 1, wherein the battery module (3) is fixed to the lower case by glue poured into the lower case.

10. An electric automobile, characterized by comprising: the power cell pack according to any one of claims 1 to 9.

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