CN217158328U - Battery air cooling system - Google Patents

Abstract

The utility model discloses a battery air cooling system, comprising a box body and a battery module. A first partition plate is arranged in the box body, the first partition plate is spaced from the bottom plate of the box body, and a plurality of first openings are arranged through the first partition plate. and a plurality of second openings, the battery module is arranged on the side of the first partition plate away from the bottom plate, and the side of the first partition plate close to the bottom plate is provided with an air inlet duct and an air outlet duct extending along the length direction of the battery module. The air duct is communicated with the first opening, and the air outlet is communicated with the second opening. The battery module includes a plurality of cells, and a cooling air duct is arranged between two adjacent cells. The air in the air duct passes through the cooling air duct. Enter the air duct. The battery air-cooling system of the utility model can improve the space utilization rate of the box body and reduce the volume of the battery air-cooling system by integrating the air inlet duct and the air outlet duct with the box body, and the air can flow between the air inlet duct and the box body. Straight in and straight out of the air outlet can effectively reduce wind resistance and improve the heat dissipation effect of the battery air cooling system.

Description

Battery air cooling system

technical field

The utility model relates to the technical field of batteries, in particular to a battery air cooling system.

Background technique

During the use of electric vehicles, the power battery system is one of the main sources of energy for the vehicle. The poor design of the heat dissipation system of the power battery system will lead to serious temperature non-uniformity, which will greatly reduce the service life of the power battery system. Therefore, in the design process of the power battery system, it is often necessary to control the temperature of the power battery system during use.

In order to take into account the economy, environmental protection and safety, the power battery system usually adopts air cooling for heat dissipation. However, the air-cooled heat dissipation air ducts of the existing power battery system are generally set inside the battery box, occupying the internal space of the box, reducing the space utilization rate of the battery system, and the heat dissipation effect is poor, which leads users to choose other cost-effective The high heat dissipation path replaces or assists air cooling for heat dissipation, and also increases the weight and structural complexity of the power battery system.

Utility model content

The purpose of the embodiments of the present utility model is to provide a battery air cooling system with a simple air duct structure, which can improve the heat dissipation effect and the uniformity of heat dissipation, and reduce the volume of the battery air cooling system.

For this purpose, the embodiment of the present utility model adopts the following technical solutions:

The utility model provides an air cooling system for a battery, comprising a box body and a battery module, wherein a first partition plate is arranged in the box body, the first partition plate is spaced from the bottom plate of the box body, and the first partition plate A plurality of first openings and a plurality of second openings are arranged throughout, the battery module is arranged on the side of the first separator away from the bottom plate, and the first separator is arranged on the side close to the bottom plate There are air inlet ducts and air outlet ducts extending along the length direction of the battery module, the air outlet of the air inlet duct communicates with the first opening, and the air inlet of the air outlet duct communicates with the second opening The battery module includes a plurality of battery cells, a cooling air duct is arranged between two adjacent battery cells, and the air in the air inlet duct enters the air outlet duct after passing through the cooling air duct.

As a preferred solution of the battery air cooling system, the box body 1 is further provided with a middle air duct 6, and the middle air duct is in sealed communication with the first opening and the cooling air duct, respectively.

As a preferred solution of the battery air cooling system, there are at least two air inlet ducts, and each of the air inlet ducts is correspondingly provided with a plurality of first openings of different sizes along the length direction. A plurality of second baffles are arranged at intervals along the length direction of the duct, the second baffles divide the mid-air duct into a plurality of chambers, and the total area of all the first openings communicated in each of the chambers is equal , so that the air intake of each of the chambers is the same.

As a preferred solution of the battery air cooling system, an air duct support is provided on the first partition, and the middle air duct is provided on the air duct support.

As a preferred solution of the battery air cooling system, two battery modules are arranged at intervals, the air duct bracket is arranged between the two battery modules, and the second opening is connected to the battery module. The air outlets of the cooling air duct correspond one by one.

As a preferred solution of the battery air-cooling system, the connecting surface of the air duct support and the battery module and the connecting surface of the air duct support and the first separator are all provided with a first sealing member .

As a preferred solution of the battery air-cooling system, an air-cooling plate is sealed between two adjacent battery cells, and the cooling air duct is arranged inside the air-cooling plate.

As a preferred solution of the battery air-cooling system, the air-cooling plate has at least one air-cooling plate air outlet and a plurality of air-cooling plate air inlets spaced along the vertical direction, and a plurality of the air-cooling plate air inlets The air outlet, the cooling air duct and the air outlet of the air cooling plate are communicated in sequence.

As a preferred solution of the battery air cooling system, a second sealing member is provided between the battery module and the first separator.

As a preferred solution of the battery air cooling system, the box body includes a lower box body and a cover plate, and a third sealing member is arranged between the lower box body and the cover plate.

The beneficial effects of the embodiment of the present utility model are: by integrating the air inlet duct and the air outlet duct in the box body 1, the air inlet duct and the air outlet duct will not occupy the space in the box body, thereby improving the space utilization rate in the box body and the The volume of the battery air cooling system is reduced, and the air inlet and outlet ducts extend along the length of the battery module. The air inlet and outlet ducts have fewer corners and shorter lengths, and the wind can flow straight in the air inlet and outlet ducts. In and straight out, the wind resistance is effectively reduced, thereby improving the heat dissipation effect of the battery air cooling system and reducing the cost.

Description of drawings

The utility model will be described in further detail below according to the accompanying drawings and embodiments.

FIG. 1 is a perspective view of a battery air cooling system according to an embodiment of the present invention.

FIG. 2 is an assembly exploded view of a battery air cooling system according to an embodiment of the present invention.

3 is a cross-sectional view of a battery air cooling system according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of the assembly of a box body and an air duct support according to an embodiment of the present invention.

FIG. 5 is a top view of a lower box body according to an embodiment of the present invention.

FIG. 6 is an assembly exploded view of the case battery module according to the embodiment of the present invention.

FIG. 7 is a bottom view of an air-cooled plate according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7 .

In the picture:

1. Box; 11. First partition; 111. First opening; 112. Second opening; 12. Bottom plate; 13. Lower box; 14. Cover plate; 2. Battery module; 21. Cell; 22, air cooling plate; 221, air outlet of air cooling plate; 222, air inlet of air cooling plate; 23, side plate; 24, end plate; 3, air inlet duct; 4, air outlet; 5, cooling air duct; 6. Middle air duct; 61. Second partition; 62. Chamber; 7. Air duct bracket; 8. Fasteners; 9. Sealing gasket.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only Some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or a fixed connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two elements or an interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Referring to FIGS. 1 to 3 , the battery air cooling system provided by the present invention includes a box 1 and a battery module 2 . A first partition 11 is arranged in the box 1 , and the first partition 11 is connected to the bottom plate of the box 1 . 12 intervals, the first separator 11 is provided with a plurality of first openings 111 and a plurality of second openings 112, the battery module 2 is arranged on the side of the first separator 11 away from the bottom plate 12, and the first separator 11 is close to the bottom plate One side of 12 is provided with an air inlet duct 3 and an air outlet duct 4 extending along the length direction of the battery module 2, the air outlet of the air inlet duct 3 is communicated with the first opening 111, and the air inlet of the air outlet 4 is connected with the second opening 111. The openings 112 are connected, the battery module 2 includes a plurality of cells 21 , and a cooling air duct 5 is provided between two adjacent cells 21 . It is understandable that the first partition 11 and the box body 1 are welded to form an integral structure, and the bottom of the box body 1 is formed with an installation cavity. The air inlet of the duct 3 and the air outlet of the air outlet 4 are both communicated with the outside of the box 1, and the external wind can enter the air outlet 4 from the air inlet 3 after passing through the cooling air duct 5 and be discharged. By integrating the air inlet duct 3 and the air outlet duct 4 in the box body 1, the air inlet duct 3 and the air outlet duct 4 will not occupy the space in the box body 1, thereby improving the space utilization rate in the box body 1 and reducing the The volume of the battery air-cooling system, and the air inlet duct 3 and the air outlet 4 extend along the length of the battery module 2. The air inlet duct 3 and the air outlet 4 have few corners and short lengths, so that the wind can reach the air inlet 3. And the air outlet 4 is straight in and straight out, which effectively reduces the wind resistance, improves the heat dissipation effect of the battery air cooling system, and reduces the cost at the same time.

Specifically, as shown in FIG. 3 , the box body 1 is further provided with a middle air duct 6 , and the middle air duct 6 is in sealing communication with the first opening 111 and the cooling air duct 5 respectively. By arranging the middle air duct 6, the battery module 2 can be isolated from the wind flowing from the air inlet duct 3 to the cooling air duct 5, so that impurities such as water vapor and dust in the wind can be prevented from directly contacting the battery module 2, thereby affecting the battery module. 2 performance and reduce the service life of the battery module 2.

Further, as shown in FIG. 2 and FIG. 4 , an air duct bracket 7 is provided on the first partition plate 11 , and the middle air duct 6 is arranged in the air duct bracket 7 . It is understandable that the air duct bracket 7 is sealedly connected with the first separator 11 and the battery module 2 , and a middle air duct 6 is formed inside the air duct bracket 7 . By arranging the air duct bracket 7 , the wind can be guided, so that the wind can quickly flow to the cooling air duct 5 for heat dissipation, thereby improving the heat dissipation efficiency of the battery module 2 .

Specifically, the connection surface between the air duct bracket 7 and the battery module 2 and the connection surface between the air duct bracket 7 and the first separator 11 are all provided with a first sealing member (not shown in the figure). By arranging the first sealing member, the sealing requirements of the battery air cooling system during heat dissipation can be guaranteed.

Preferably, the first sealing member is a sealing foam.

Specifically, as shown in FIG. 2 , the air duct bracket 7 is fixed on the first partition 11 by the fastener 8 , and a sealing gasket 9 is provided between the fastener 8 and the air duct bracket 7 . By arranging the sealing gasket 9, the airtightness of the middle air duct 6 is further ensured.

In this embodiment, as shown in FIG. 2 , two battery modules 2 are arranged at intervals, the air duct bracket 7 is arranged between the two battery modules 2 , and the first opening 111 is arranged between the two battery modules 2 . There are two rows of second openings 112, and the second openings 112 correspond to the air outlets of the cooling air duct 5 one-to-one. This design enables one central air duct 6 to guide the wind flowing into the central air duct 6 to two battery modules 2 at the same time, thereby reducing the number of air duct brackets 7 and the sealing surface of the air duct brackets 7 , reducing the volume of the box 1 and reducing the cost.

Specifically, a second sealing member (not shown in the figure) is provided between the battery module 2 and the first separator 11 . By designing the second seal, the connection between the second opening 112 and the air outlet of the cooling air duct 5 can be sealed.

Preferably, the second seal is also a sealing foam.

Specifically, referring to FIGS. 1 and 2 , the box body 1 includes a lower box body 13 and a cover plate 14 . The lower box body 13 and the bottom plate 12 are integrally formed by welding. Three sealing parts (not shown in the figure), the third sealing part is a sealing ring. By arranging the third gasket, the airtightness of the battery module 2 in the box 1 is further ensured. The air-cooled system can achieve IP67 sealing requirements while dissipating heat.

2, there are at least two air inlet ducts 3, each air inlet duct 3 is correspondingly provided with a plurality of first openings 111 of different sizes along the length direction, and the middle air duct 6 is provided with a plurality of first openings 111 along the length direction. The second partition 61 divides the mid-air duct 6 into a plurality of chambers 62 , and the total area of all the first openings 111 communicated in each chamber 62 is equal, so that the total area of each chamber 62 is equal. The air intake is the same. Due to the direction of wind flow, the air intake volume of the first opening 111 close to the air inlet of the air inlet duct 3 is larger than that of the first opening 111 far away from the air inlet of the air inlet duct 3, and the battery module 2 is prone to poor heat dissipation. uniform phenomenon. Each central air duct 6 is provided with a plurality of first openings 111 with different sizes at intervals along the length direction (ie, the direction of cold air flow), so that the air intake volume of each first opening 111 is different, but the air intake in each chamber 62 is different. The total area of all the first openings 111 is equal, so as to control the air intake volume in each chamber 62 to be the same, so that the air volume flowing to all the cooling air ducts 5 on each battery module 2 is the same, and the heat dissipation of the battery module 2 is improved. uniformity and cooling effect.

In this embodiment, as shown in FIGS. 6 to 8 , an air cooling plate 22 is sealed between two adjacent cells 21 , and a cooling air duct 5 is arranged inside the air cooling plate 22 . By arranging the cooling air duct 5 in the air-cooling plate 22 and sealing the air-cooling plate 22 with the cells 21 , the airtightness between the cooling air duct 5 and the cells 21 can be further ensured while dissipating heat.

Specifically, the air-cooling plate 22 is sealed and disposed between two adjacent battery cells 21 by a pre-tightening force. The battery module 2 also includes a side plate 23 and an end plate 24. A plurality of cells 21 and an air cooling plate 22 form a cell group. Both ends of the cell group along the length direction are provided with end plates 24, and the side plates 23 are fastened. The two end plates 24 are used to firmly fix the cells 21 and the air-cooling plate 22 together, and provide a pre-tightening force to seal the air-cooling plate 22 between two adjacent cells 21 .

Further, as shown in FIG. 8 , the air-cooling plate 22 has at least one air-cooling plate air outlet 221 and a plurality of air-cooling plate air inlets 222 spaced along the vertical direction, a plurality of air-cooling plate air inlets 222, cooling air The channel 5 is communicated with the air outlet 221 of the air cooling plate in sequence. Specifically, the air-cooling plate 22 is provided with a plurality of guide grooves with air inlets along the vertical direction, and the plurality of guide grooves converge at an air outlet to form the cooling air duct 5 . This design can increase the heat dissipation area for the battery cells 21 , thereby enhancing the heat dissipation effect, effectively reducing the temperature difference between the battery cells 21 when the battery module 2 is running stably, and further improving the heat dissipation uniformity of the battery module 2 .

In the description herein, it should be understood that the azimuth or positional relationship such as the term "upper" is based on the azimuth or positional relationship shown in the accompanying drawings, which is only for the convenience of description and simplification of operations, rather than indicating or implying the referred device. Or the elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of this specification, description with reference to the terms "an embodiment" or the like means that a particular feature, structure, material or characteristic in combination with the embodiment is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The technical principle of the present invention has been described above with reference to the specific embodiments. These descriptions are only for explaining the principle of the present invention, and should not be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the present invention without creative efforts, and these methods will all fall within the protection scope of the present invention.

Claims (10)

1. A battery air-cooling system, comprising a box body and a battery module, characterized in that, a first partition plate is arranged in the box body, the first partition plate is spaced from the bottom plate of the box body, and the first partition plate is A plurality of first openings and a plurality of second openings are arranged through the separator, the battery module is arranged on the side of the first separator away from the bottom plate, and the first separator is close to a side of the bottom plate. The side is provided with an air inlet duct and an air outlet duct extending along the length direction of the battery module, the air outlet of the air inlet duct communicates with the first opening, and the air inlet of the air outlet duct communicates with the second The openings are in communication, the battery module includes a plurality of battery cells, a cooling air duct is arranged between two adjacent battery cells, and the air in the air inlet duct enters the air outlet duct after passing through the cooling air duct. 2 . The battery air cooling system according to claim 1 , wherein a middle air duct is further provided in the box, and the middle air duct is in sealed communication with the first opening and the cooling air duct, respectively. 3 . 3 . The battery air cooling system according to claim 2 , wherein there are at least two air inlet ducts, and each of the air inlet ducts is correspondingly provided with a plurality of different sizes of the first air inlet duct along the length direction. 4 . opening, the mid-air duct is provided with a plurality of second partitions at intervals along the length direction, the second partition divides the mid-air duct into a plurality of chambers, and all the first and second partitions communicated in each of the chambers The total area of the openings is equal to allow the same air intake to each of the chambers. 4 . The battery air cooling system according to claim 2 , wherein an air duct bracket is provided on the first separator, and the middle air duct is arranged on the air duct bracket. 5 . 5 . The battery air cooling system according to claim 4 , wherein two battery modules are arranged at intervals, the air duct bracket is arranged between the two battery modules, and the first battery module The two openings correspond one-to-one with the air outlets of the cooling air duct. 6 . The battery air cooling system according to claim 4 , wherein the connection surface between the air duct bracket and the battery module, and the connection surface between the air duct bracket and the first separator are all provided. 7 . There is a first seal. 7 . The battery air cooling system according to claim 1 , wherein an air cooling plate is sealed between two adjacent battery cells, and the cooling air duct is arranged inside the air cooling plate. 8 . 8 . The battery air-cooling system according to claim 7 , wherein the air-cooling plate has at least one air-cooling plate air outlet and a plurality of air-cooling plate air inlets arranged at intervals along the vertical direction, and a plurality of air-cooling plate air inlets are provided. 9 . The air inlet of the air-cooling plate, the cooling air duct and the air outlet of the air-cooling plate are communicated in sequence. 9 . The battery air cooling system according to claim 1 , wherein a second sealing member is provided between the battery module and the first separator. 10 . 10 . The battery air cooling system according to claim 1 , wherein the box body comprises a lower box body and a cover plate, and a third sealing member is arranged between the lower box body and the cover plate. 11 .

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