CN206742338U - Air-cooled structure power battery box and batteries of electric automobile - Google Patents

Abstract

A kind of air-cooled structure power battery box and batteries of electric automobile are the utility model is related to, belongs to the cooling structure technical field of battery case.The air-cooled structure power battery box, applied to electric automobile, including the battery case body for placing battery module.Battery case body is hollow housing, battery case body includes the accommodating chamber with air inlet and air outlet, the side wall of accommodating chamber is provided with multigroup wind guiding component, and circulating direction of multigroup wind guiding component along cooling air is distributed side by side, the gas flowing that wind guiding component is used to improve in small space.The batteries of electric automobile includes battery modules and above-mentioned air-cooled structure power battery box, it is rational in infrastructure, air flow structure is influenceed by wind guiding component, increase high turbulence, improve the time of contact of cooling air and battery modules, the radiating effect of battery modules can be effectively increased, improves the uniformity of battery the temperature inside the box, improves the service life of batteries of electric automobile.

Description

Air-cooled structure power battery box and electric vehicle battery

technical field

The utility model relates to the technical field of the cooling structure of the battery box, and relates to an air-cooled power battery box with a non-smooth surface treatment of an air inlet, in particular to an air-cooled structure power battery box and an electric vehicle battery.

Background technique

As problems such as environmental pollution and resource shortage become more and more prominent, people are paying more and more attention to the sustainable development of the world. In the automotive industry, countries around the world are vigorously developing electric vehicles. As the power source of electric vehicles, power batteries are not only an energy-saving and environmentally friendly new energy source, but also solve a series of problems caused by existing fossil fuel vehicles.

Power batteries are very sensitive to temperature, and will generate a lot of heat during charging and discharging. When applied to electric vehicles, the power battery is often used in groups of many single cells, which will inevitably lead to problems such as uneven temperature of the battery pack and difficulty in heat dissipation. However, when the battery is operated or stored at an unsuitable temperature, the aging of the battery will be accelerated, the service life of the battery will be shortened, and the cost will be increased.

In the prior art, electric vehicles adopt a liquid-cooled battery thermal management system, which not only requires relatively high technical requirements, but also has relatively high costs.

Utility model content

The purpose of this utility model is to solve the above problems, to provide an air-cooled power battery box and electric vehicle battery, through the air guide assembly to improve the flow structure of the cooling air, increase the contact time between the cooling air and the battery module, which can effectively Increase the heat dissipation effect of the battery module, improve the uniformity of the temperature in the battery box, and improve the above problems.

Embodiments of the utility model are achieved in that:

The utility model provides an air-cooled structure power battery box, which is applied to an electric vehicle and comprises a battery box body for placing a battery module. The battery box body is a hollow shell, and the battery box body includes a housing chamber with an air inlet and an air outlet. Cooling air can enter the housing chamber through the air inlet and flow out of the housing chamber through the air outlet. As for the wind assembly, multiple sets of air guide assemblies are distributed side by side along the flow direction of the cooling air, and the air guide assembly is used to improve the flow structure of the cooling air.

In an optional embodiment of the present utility model, the battery box body extends outward from the air inlet to form an air inlet passage communicated with the accommodation chamber, and the battery box body extends outward from the air outlet to form an air outlet passage communicated with the accommodation chamber. The air component is located on the side wall of the accommodating cavity connected with the air inlet channel.

In an optional embodiment of the utility model, the air inlet and the air outlet are respectively located on opposite sides of the accommodating chamber.

In an optional embodiment of the present invention, the battery box body is a cuboid structure, and the battery module is located in the cooling air circulation direction.

In an optional embodiment of the present invention, the air inlet and the air outlet are respectively located at two opposite corners of the battery box body.

In an optional embodiment of the present invention, the air guide assembly includes a plurality of protrusions distributed side by side along the cooling air flow direction.

In an optional embodiment of the present invention, the cross-sectional size of one of the protrusions is larger than that of the other protrusions.

In an optional embodiment of the present invention, the cross-sectional shape of the protrusion is at least one of triangle, trapezoid, rectangle and semicircle.

This embodiment also provides an electric vehicle battery, including a battery module and the above-mentioned air-cooled structure power battery box, and the battery module is fixed in the accommodating cavity.

In an optional embodiment of the present invention, the battery module includes a plurality of batteries arranged side by side along the cooling air flow direction, between two adjacent batteries, between the battery close to the side plate of the accommodation cavity and the side wall of the accommodation cavity Air ducts are formed between them, and the air guide components are set corresponding to the air ducts.

Compared with the prior art, the beneficial effects of the utility model are:

Based on the above-mentioned embodiment, the air guide assembly is arranged in the accommodation cavity of the battery box, and the structure is reasonable. The flow structure of the cooling air is improved through the air guide assembly, and the contact time between the cooling air and the battery module is increased, which can effectively increase the life of the battery module. Heat dissipation effect, improve the uniformity of temperature in the battery box, and improve the service life of electric vehicle batteries.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is a schematic structural view of an air-cooled structure power battery box according to the first embodiment of the present invention;

Fig. 2 is a first structural schematic diagram of the air guide assembly in Fig. 1;

Fig. 3 is a second structural schematic diagram of the air guide assembly in Fig. 1;

Fig. 4 is a schematic diagram of a third structure of the air guide assembly in Fig. 1;

Fig. 5 is a schematic diagram of a fourth structure of the air guide assembly in Fig. 1;

6 is a schematic structural view of an electric vehicle battery according to a second embodiment of the present invention;

Fig. 7 is a first structural schematic diagram of the air guide assembly in Fig. 6;

Fig. 8 is a second structural schematic diagram of the air guide assembly in Fig. 6;

Fig. 9 is a schematic diagram of a third structure of the air guide assembly in Fig. 6;

FIG. 10 is a schematic diagram of a fourth structure of the air guide assembly in FIG. 6 .

Icons: 100-air-cooled structure power battery box; 200-electric vehicle battery; 11-battery box body; 110-accommodating cavity; 111-air inlet; 112-air outlet; 12-air guide assembly; 121-protrusion; 21-battery module; 211-air duct.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "inner", "outer" etc. is based on the orientation or positional relationship shown in the accompanying drawings, or is the product of the utility model The orientation or positional relationship that is customarily placed in use is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot It should be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

first embodiment

Please refer to FIG. 1 , the present embodiment provides an air-cooled structure power battery box 100, which is applied to electric vehicles, and includes a battery box body 11 for placing battery modules.

As shown in FIG. 1 , in this embodiment, the battery box body 11 is a hollow shell, and the battery box body 11 includes an accommodating chamber 110 having an air inlet 111 and an air outlet 112 . The accommodating cavity 110 is used to place the battery module, that is, the battery box body 11 is a protection device for the battery module, and is used to protect the battery module located in the battery box body 11 . The setting of the air inlet 111 and the air outlet 112 enables the cooling air to enter the accommodation cavity 110 through the air inlet 111, flow through the battery module, air-cool the battery module, and carry the heat emitted by the battery module through the air outlet 112. Out, that is, the connection between the air inlet 111 and the air outlet 112 forms a cooling air circulation channel. The side wall of the housing cavity 110 is provided with multiple sets of air guide assemblies 12 , and the multiple sets of air guide assemblies 12 are arranged side by side along the flow direction of the cooling air. The air guide assemblies 12 are used to improve the flow structure of the cooling air and form turbulent flow.

It should be pointed out that the outline shape of the battery box body 11 can be in various styles, and the user can choose different forms of the battery box body 11 according to the interior space of the electric vehicle.

In order to concentrate the incoming air force of the cooling air and collect the cooling air flowing out from the accommodating chamber 110 , the battery box body 11 extends outward from the air inlet 111 to form an air inlet channel 113 communicating with the accommodating chamber 110 , and the battery box body 11 is connected by the air outlet 112 An air outlet channel 114 communicating with the accommodating cavity 110 is formed by extending outward.

The air inlet passage 113 allows the cooling air to gather in the air inlet passage 113 before entering the accommodation cavity 110, so as to prevent the cooling air from entering the accommodation chamber 110 from different directions, and enhance the wind force of the cooling air entering the accommodation chamber 110, so that the cooling air is When entering the accommodation chamber 110, there is a certain wind force, which improves the power of the cooling air circulating in the accommodation chamber 110, and increases the cooling effect of the cooling air on the battery module. That is to say, the cooling air with strong wind can quickly drive the heat dissipated from the surface of the battery module, thereby reducing the temperature of the battery module and playing the role of cooling.

Further, the air guide assembly 12 is located on the side wall of the accommodation chamber 110 connected to the air inlet passage 113, when the cooling air enters the accommodation chamber 110 from the air inlet passage 113, the wind force is relatively strong, and the cooling air passes through the air guide function of the air guide assembly 12 , the flow direction of the cooling air is disturbed to form turbulent flow. The air guide assembly 12 is arranged close to the air inlet channel 113 to increase the turbulence of the cooling air after passing through the air guide assembly 12 . Since the position of the air inlet 111 can be in various forms, the cooling air that enters the accommodating chamber 110 through the air inlet 111 at different positions will have different degrees of turbulence after meeting the air guide assembly 12 .

The positions of the air inlet 111 and the air outlet 112 can be in various forms. The air inlet 111 and the air outlet 112 in different positions form different cooling air circulation channels, so that the cooling effect of the battery module in the accommodating cavity 110 is different. The centerline of the air inlet 111 and the centerline of the air outlet 112 can be collinear or not, and users can choose different methods according to actual conditions. When the centerline of the air inlet 111 and the centerline of the air outlet 112 are collinear, the air inlet 111 and the air outlet 112 are located on the same straight line, the cooling air flows in a straight line in the accommodating cavity 110 , and the cooling effect of the battery module is poor. When the centerline of the air inlet 111 and the centerline of the air outlet 112 are not collinear, the cooling air in the accommodating cavity 110 needs to bypass the battery module and flow out from the air outlet 112, which improves the cooling effect of the battery module.

In order to make reasonable use of the interior space of the electric vehicle, as an optional method in this embodiment, the centerline of the air inlet 111 and the centerline of the air outlet 112 are not collinear, which increases the flow distance of the cooling air in the accommodation chamber 110, which is convenient for the battery. Module air cooling. According to the structure of the battery box body 11 , the air inlet 111 and the air outlet 112 may be located on the same side of the accommodating cavity 110 , or may be located on different sides of the accommodating cavity 110 .

When the air inlet 111 and the air outlet 112 are located on the same side of the housing chamber 110, the cooling air enters the housing chamber 110 through the air inlet 111, flows in the housing chamber 110, bypasses the battery module set in the housing chamber 110, and flows from the outlet The tuyere 112 flows out. During the flow of the cooling air, since the air inlet 111 and the air outlet 112 are located on the same side of the housing cavity 110, part of the cooling air passes through the gap between the battery module and the side wall of the housing chamber 110 located on the same side as the air inlet 111 and the air outlet 112. The channel flows to the air outlet 112 and flows out from the air outlet 112. This part of the cooling air flows through the area of the battery module on the channel is less, the cooling effect on the battery module is poor, and the cooling effect of the cooling air is wasted.

When the air inlet 111 and the air outlet 112 are respectively located on opposite sides of the receiving chamber 110, the cooling air forms convection in the receiving chamber 110, which increases the flow of the cooling air and facilitates the cooling air to take away the heat emitted by the battery module. The opposite arrangement of the air inlet 111 and the air outlet 112 , relative to the same side of the air inlet 111 and the air outlet 112 , increases the fluidity of the cooling air and facilitates the increase of the flow speed of the cooling air in the accommodating chamber 110 . The opposite arrangement of the air inlet 111 and the air outlet 112 also makes the cooling air have to flow through the battery module, thereby increasing the contact time between the cooling air and the battery module.

As an optional mode of this embodiment, as shown in Figure 1, the battery box body 11 is a cuboid structure, the air inlet 111 and the air outlet 112 are respectively located on opposite sides of the accommodation chamber 110, and the battery module is located in the flow channel of the cooling air , that is, the shape of the battery box body 11 is Z-shaped, and the air inlet channel 113 and the air outlet channel 114 are respectively located on both sides of the battery box body 11 . The battery module is located between the air inlet 111 and the air outlet 112 . Cooling air enters the accommodating cavity 110 through the air inlet channel 113 , flows through the battery module and flows out of the accommodating cavity 110 through the air outlet channel 114 .

Furthermore, the air inlet 111 and the air outlet 112 are respectively located at two opposite corners of the battery box body 11 . The air inlet 111 and the air outlet 112 arranged diagonally maximize the flow path of the cooling air in the housing chamber 110 and increase the circulation time of the cooling air in the housing chamber 110. The flowing cooling air acts on the battery module, improving the The heat dissipation efficiency of the battery module is improved, and the heat dissipation of the battery module in the battery box is even.

As shown in Figure 1, the air inlet 111 and the air outlet 112 are respectively opened on the edge of the battery box body 11, and the side wall of the air inlet channel 113 is flush with the edge of the battery box body 11, that is to say, the air inlet channel 113 and the battery A pair of side walls of the box body 11 are parallel, and the air inlet channel 113 is close to the edge of the battery box body 11 , and correspondingly, the air outlet channel 114 is opposite to the air inlet channel 113 . Since the air inlet channel 113 is located at the edge of the battery box body 11, when the cooling air enters the housing chamber 110 through the air inlet channel 113, the circulation path of the cooling air in the housing chamber 110 is zigzag, in order to better improve the turbulent flow of the cooling air The air guide assembly 12 is located on the side wall of the accommodating cavity 110 connected with the air inlet channel 113 .

Further, as shown in FIG. 2 , the air guide assembly 12 includes a plurality of protrusions 121 distributed side by side along the circulation direction of the cooling air, and the protrusions 121 are arranged along the thickness direction of the battery box body 11 (the top surface of the battery box body 11 to the bottom surface). direction, that is, the direction in which the battery module is placed) extends.

It should be pointed out that the distance between two adjacent groups of air guiding components 12 can be selected according to the actual situation of the accommodating cavity 110 , and the number of protrusions 121 and the interval between the protrusions 121 can be set according to the actual situation.

In order to better improve the flow structure of the cooling air, the cross-sectional size of one protrusion 121 is larger than that of the other protrusions 121 . That is to say, the air guide assembly 12 includes two kinds of protrusions 121, large and small, and the large and small protrusions 121 are arranged at intervals so that when the cooling air flows through the air guide assembly 12, after the flow direction of the large protrusion 121 changes, the The small protrusions 121 adjacent to the large protrusion 121 continue to disturb the cooling air flowing through, changing the flow direction of the cooling air, thereby forming turbulent flow.

Furthermore, the cross-sectional shape of the protrusion 121 can be in various forms, such as regular shapes such as triangle, trapezoid, rectangle, and semicircle, or other irregular shapes, and users can choose different cross-sectional shapes according to actual needs. . In this embodiment, as shown in Figures 2, 3, 4, and 5, the cross-sectional shape of the protrusion 121 can be at least one of triangle, trapezoid, rectangle, and semicircle, that is, the cross-sectional shape of the protrusion 121 It can be one or more of the above shapes.

The working principle of the utility model embodiment is:

The cooling air enters the accommodation cavity 110 through the air inlet channel 113, and under the action of the air guide assembly 12, the flow direction of the cooling air is changed, and the cooling air forms a turbulent flow in the accommodation cavity 110, which increases the flow of the cooling air in the accommodation cavity 110 performance, and improve the heat dissipation efficiency of the battery module.

The beneficial effects of the utility model embodiment are:

Based on the above embodiments, the utility model provides an air-cooled power battery box 100, the cooling air forms a circulation channel in the battery box body 11, and the inner wall of the battery box body 11 is provided with an air guide assembly 12 to improve the turbulent flow of the cooling air The battery module can be placed arbitrarily in the accommodating cavity 110, and the battery module can dissipate heat evenly, thereby improving the service life of the battery module.

second embodiment

Please refer to FIG. 6 , this embodiment provides an electric vehicle battery 200, including a battery module 21 and an air-cooled structure power battery box 100 provided in the first embodiment, the battery module 21 is fixed in the housing cavity 110, and the rest are not Mention refers to the first embodiment or the prior art.

In this embodiment, the battery module 21 includes a plurality of batteries arranged side by side along the flow direction of the cooling air. Air passages 211 are formed between them. It should be pointed out that the arrangement of batteries side by side here may refer to the arrangement of multiple batteries in a matrix; it may also refer to the arrangement of multiple batteries in disorder, but the extending direction of the batteries is arranged side by side. Users can choose different battery arrangements according to the actual situation.

In order to improve the cooling effect of the cooling air on the battery module 21 , as an optional mode of this embodiment, the air guide assembly 12 is provided corresponding to the air duct 211 . As shown in FIGS. 7 , 8 , 9 and 10 , they are structural schematic diagrams of protrusions 121 of different shapes. That is to say, the air guide assembly 12 is arranged on the side wall of the housing chamber 110 perpendicular to the air passage 211, and in the direction facing the air passage 211, the air guide assembly 12 disturbs the flow direction of the cooling air, so that the cooling air forms a turbulent flow, cooling The air turns to the air duct 211 and the battery module 21 . The strong wind speed increases the fluidity of the cooling air, which is beneficial to the heat dissipation of the battery module 21 and the flow of heat, so that the heat dissipation of the battery module 21 is even. In order to disturb the flow direction of the cooling air in the accommodating cavity 110, the air guide assembly 12 can be arranged in different positions, not limited to the side wall of the accommodating cavity 110 facing the air channel 211 and the battery module 21, the user can according to the actual situation Choose a different location.

The beneficial effects of this embodiment are:

The electric vehicle battery 200 includes a battery module 21 and an air-cooled power battery box 100 wrapping the battery module 21. The structure of the battery box is reasonable, and the cooling air forms a turbulent flow in the battery box to improve the heat dissipation performance of the battery module 21 and improve The uniformity of temperature in the battery box increases the service life of the electric vehicle battery 200 .

In summary, the utility model provides an air-cooled power battery box 100 and an electric vehicle battery 200. The air guide assembly 12 is provided to improve the flow structure of the cooling air and increase the contact time between the cooling air and the battery module 21. , can effectively increase the heat dissipation effect of the battery module 21, improve the uniformity of the temperature in the battery box, and improve the service life of the electric vehicle battery 200.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A power battery box with an air-cooled structure, which is applied to an electric vehicle, is characterized in that it includes a battery box body for placing a battery module; The battery box body is a hollow shell, and the battery box body includes an accommodating chamber with an air inlet and an air outlet, and cooling air can enter the accommodating chamber through the air inlet and flow out of the accommodating chamber through the air outlet. cavity, the side wall of the accommodating cavity is provided with multiple sets of air guide assemblies, the multiple sets of air guide assemblies are distributed side by side along the flow direction of the cooling air, and the air guide assemblies are used to improve the flow structure of the cooling air. 2. The power battery box with air-cooled structure according to claim 1, characterized in that, the battery box body extends outward from the air inlet to form an air inlet channel communicating with the accommodating cavity, and the battery box body is formed by an air outlet The air outlet extends outward to form an air outlet channel that communicates with the accommodating cavity, and the air guide assembly is located on a side wall of the accommodating cavity that is connected to the air inlet channel. 3 . The air-cooled power battery box according to claim 1 , wherein the air inlet and the air outlet are respectively located on opposite sides of the accommodating cavity. 4 . 4. The air-cooled power battery box according to claim 3, wherein the battery box body is a cuboid structure, and the battery module is located in the cooling air circulation direction. 5 . The air-cooled power battery box according to claim 4 , wherein the air inlet and the air outlet are respectively located at two opposite corners of the battery box body. 6 . The power battery box with air-cooled structure according to claim 1 , wherein the air guide assembly comprises a plurality of protrusions distributed side by side along the flow direction of the cooling air. 7 . 7. The power battery box with an air-cooled structure according to claim 6, wherein the cross-sectional size of one of the protrusions is larger than the cross-sectional size of the other protrusions. 8 . The air-cooled structure power battery box according to claim 7 , wherein the cross-sectional shape of the protrusion is at least one of triangle, trapezoid, rectangle and semicircle. 9. An electric vehicle battery, characterized in that it comprises a battery module and the air-cooled structure power battery box according to any one of claims 1-8, the battery module is fixed in the accommodating cavity. 10. The electric vehicle battery according to claim 9, characterized in that, the battery module includes a plurality of batteries arranged side by side along the cooling air flow direction, between two adjacent batteries, close to the side plate of the accommodating cavity An air passage is formed between the battery and the side wall of the accommodating cavity, and the air guide assembly is arranged corresponding to the air passage.