Battery pack box air duct

Abstract

The utility model relates to the technical field of battery pack box bodies, and discloses a battery pack box body air duct which comprises a box body and a battery module arranged in an inner cavity of the box body, the battery module does not make contact with the side wall of the box body, and heat dissipation air ducts are arranged in the inner cavity of the box body and located on the periphery of the battery module in a one-to-one correspondence mode. Air outlets are formed in the sides, close to the battery modules, of the heat dissipation air channels, a fan is arranged in an inner cavity of the box body, and air fed by the air outlets of the fan is exhausted from the side walls of the battery modules through the heat dissipation air channels. According to the utility model, the special air duct design is adopted, so that the battery module in the battery pack can be cooled from four sides, the battery module in the battery pack can be prevented from being in direct contact with the cavity wall of the box body, and the stability of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack boxes, in particular to a battery pack box air duct. Background Art

[0002] The battery case is an essential component of a lithium-ion battery pack. Currently, battery pack cases on the market come in two designs: cooling ducts and non-ducts. Cases with cooling ducts simply create a cavity within the case for airflow and heat dissipation, leaving the battery modules in full contact with the case. This design results in poor airflow and heat dissipation within the battery pack. Cases without cooling ducts completely expose the battery modules to the case, relying on the case's own thermal conductivity or external heat dissipation devices. This design results in poor heat dissipation within the battery pack, potentially leading to thermal runaway and temperature increases during operation. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the existing technology, the present invention provides a battery pack box air duct, which solves the problem that the existing battery pack box internal air duct design is not conducive to stable and rapid heat dissipation of the battery module.

[0005] (2) Technical solution

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A battery pack box air duct comprises a box and a battery module arranged in an inner cavity of the box, wherein the battery module does not contact the side walls of the box, and the inner cavity of the box is provided with heat dissipation ducts arranged one-to-one around the battery module, and the heat dissipation ducts are provided on the side close to the battery module. The inner cavity of the box is provided with a fan, and the air sent in by the air outlet of the fan is discharged from the side walls of the battery module through the heat dissipation ducts.

[0008] Preferably, the inner cavity of the box body is provided with an air inlet cavity on one side of the battery module, an air inlet is provided on the air inlet cavity, the air inlet is located directly below the air outlet end of the fan, and a middle partition is arranged on the side of the air inlet cavity close to the battery module, and a first air outlet is provided on the middle partition.

[0009] Preferably, a first air outlet cavity is arranged on one side of the middle partition, the first air outlet cavity is communicated with the first air outlet port, and a plurality of first heat dissipation ports are evenly arranged on one side of the first air outlet cavity close to the battery module.

[0010] Preferably, the middle partition is symmetrically provided with a second air outlet, the side wall of the box body is symmetrically arranged with a second air outlet cavity, the second air outlet cavity is connected one-to-one with the second air outlet, a third air outlet cavity is provided on one side of the second air outlet cavity, the cavity wall of the second air outlet cavity is connected with the third air outlet cavity through a connecting port, and a plurality of second heat dissipation ports are evenly arranged on the side of the third air outlet cavity close to the battery module.

[0011] Preferably, a fourth air outlet cavity is arranged in the box at a symmetrical position of the first air outlet cavity, the fourth air outlet cavity is connected to the second air outlet cavity, and a plurality of third heat dissipation openings are evenly arranged on the cavity wall of the fourth air outlet cavity close to the battery module.

[0012] Preferably, the middle partition, the first air outlet cavity, the second air outlet cavity, the third air outlet cavity and the fourth air outlet cavity form a stepped groove at the bottom of the cavity of the box body, and the lower end surface of the battery module is fixedly arranged in the stepped groove.

[0013] (3) Beneficial effects

[0014] The utility model has the following beneficial effects:

[0015] The battery pack case's air ducts, arranged in a circular pattern around the battery modules, provide cooling and heat dissipation from all four sides of the battery modules when the fan is activated, effectively improving the heat dissipation of the entire battery pack and enhancing its thermal runaway resistance. This unique air duct design offers a simple structure and strong adaptability. During use, the battery modules are independently arranged through slots, preventing direct contact between the modules and the battery pack case and improving stability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model in the installed state of the box and battery module;

[0017] Figure 2 This is a schematic diagram of the overall structure of the box body of the utility model;

[0018] Figure 3 This is a schematic diagram of the first partial cutaway structure of the box body of the utility model;

[0019] Figure 4 This is a schematic diagram of the second partial cutaway structure of the box body of the present invention.

[0020] In the figure: 1. Box body; 11. Air inlet; 12. Air inlet cavity; 13. Middle partition; 14. First air outlet; 15. First air outlet cavity; 16. First heat dissipation vent; 17. Second air outlet; 18. Second air outlet cavity; 19. Connecting port; 110. Third air outlet cavity; 111. Second heat dissipation vent; 112. Fourth air outlet cavity; 113. Third heat dissipation vent; 2. Fan; 3. Battery module. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1 The utility model provides a technical solution: an air duct of a battery pack box 1, comprising a box 1 and a battery module 3 arranged in the inner cavity of the box 1, the battery module 3 does not contact the side wall of the box 1, and the inner cavity of the box 1 is arranged with heat dissipation ducts one by one around the battery module 3. The heat dissipation duct is provided with an air outlet on the side close to the battery module 3, and the inner cavity of the box 1 is provided with a fan 2, and the air sent in by the air outlet of the fan 2 is discharged from the side wall of the battery module 3 through the heat dissipation duct.

[0023] This utility model utilizes a circular cooling duct surrounding the battery module 3. This allows for air cooling on all four sides of the battery module 3 when the fan 2 is activated, effectively improving the heat dissipation of the entire battery pack and enhancing the battery module 3's ability to prevent thermal runaway. The unique air duct design provides a simple structure and enhanced adaptability. During use, the battery module 3 is independently arranged through slots, preventing direct contact between the battery module 3 and the battery pack housing 1, thereby improving the stability of the battery module 3 during operation.

[0024] In this embodiment, the inner cavity of the box body 1 is located on one side of the battery module 3 and is provided with an air inlet cavity 12, on which is provided an air inlet 11, which is located directly below the air outlet end of the fan 2, and an intermediate partition 13 is arranged on the side of the air inlet cavity 12 close to the battery module 3, on which is provided a first air outlet 14.

[0025] Reference Figure 2 and 3As shown, in this embodiment, a first air outlet cavity 15 is arranged on one side of the middle partition 13. The first air outlet cavity 15 is connected to the first air outlet 14. A plurality of first heat dissipation vents 16 are evenly arranged on the side of the first air outlet cavity 15 near the battery module 3. The fan 2 drives cold air from the air inlet 11 into the air inlet cavity 12, and then the cold air is blown into the first air outlet cavity 15 from the first air outlet 14, and then blown out from the first heat dissipation vents 16 on the first air outlet cavity 15, thereby dissipating heat from the front surface of the battery module 3.

[0026] Reference Figure 3 and 4 As shown, in this embodiment, second air outlets 17 are symmetrically arranged on the middle partition 13, and second air outlet cavities 18 are symmetrically arranged on the side walls of the housing 1. The second air outlet cavities 18 are connected one-to-one with the second air outlets 17. A third air outlet cavity 110 is provided on one side of the second air outlet cavity 18. The second air outlet cavity 18 is connected to the third air outlet cavity 110 through a connecting port 19 on the cavity wall. A plurality of second heat dissipation vents 111 are evenly arranged on the side of the third air outlet cavity 110 near the battery module 3. Cold air in the air inlet cavity 12 can be diverted from the second air outlet 17 into the second air outlet cavity 18, and then blown out through the connecting port 19 and the second heat dissipation vents 111 on the third air outlet cavity 110, thereby dissipating heat from both sides of the battery module 3.

[0027] Reference Figure 2-4 As shown, in this embodiment, a fourth air outlet cavity 112 is arranged symmetrically with respect to the first air outlet cavity 15 within the housing 1. The fourth air outlet cavity 112 communicates with the second air outlet cavity 18. A plurality of third heat dissipation openings 113 are evenly arranged on the wall of the fourth air outlet cavity 112 on one side near the battery module 3. Cold air can flow through the second air outlet cavity 18 into the fourth air outlet cavity 112 and then out of the third heat dissipation openings 113 toward the rear of the battery module 3, thereby dissipating heat from the rear of the battery module 3.

[0028] Reference Figure 1 and 3 As shown, in this embodiment, the middle partition 13, the first air outlet cavity 15, the second air outlet cavity 18, the third air outlet cavity 110, and the fourth air outlet cavity 112 form a stepped groove at the bottom of the housing 1, and the lower end surface of the battery module 3 is fixedly disposed in the stepped groove. The stepped groove effectively isolates the battery module 3 from the side walls of the battery pack housing 1, preventing direct contact between the two and affecting the stability of the battery module 3 during subsequent use.

[0029] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations. The phrase "includes an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery pack box air duct, comprising a box and a battery module disposed in the inner cavity of the box, characterized in that: The battery module does not come into contact with the side wall of the box body. The inner cavity of the box body is provided with heat dissipation ducts arranged one by one around the battery module. The heat dissipation ducts are provided with air outlets on the side close to the battery module. The inner cavity of the box body is provided with a fan. The air sent in from the air outlet of the fan is discharged from the side wall of the battery module through the heat dissipation ducts.

2. The battery pack box air duct according to claim 1, characterized in that: The inner cavity of the box body is located on one side of the battery module and is provided with an air inlet cavity, the air inlet cavity is provided with an air inlet, the air inlet is located directly below the air outlet end of the fan, and a middle partition is arranged on the side of the air inlet cavity close to the battery module, and the middle partition is provided with a first air outlet.

3. The battery pack box air duct according to claim 2, characterized in that: A first air outlet cavity is arranged on one side of the middle partition, the first air outlet cavity is communicated with the first air outlet port, and a plurality of first heat dissipation ports are evenly arranged on one side of the first air outlet cavity close to the battery module.

4. The battery pack box air duct according to claim 3, characterized in that: The middle partition is symmetrically provided with a second air outlet, and the side wall of the box body is symmetrically arranged with a second air outlet cavity, the second air outlet cavity is connected one by one with the second air outlet, a third air outlet cavity is provided on one side of the second air outlet cavity, and the cavity wall of the second air outlet cavity is connected with the third air outlet cavity through a connecting port, and a plurality of second heat dissipation outlets are evenly arranged on the side of the third air outlet cavity close to the battery module.

5. The battery pack box air duct according to claim 4, characterized in that: A fourth air outlet cavity is arranged in the box at a symmetrical position of the first air outlet cavity, the fourth air outlet cavity is connected to the second air outlet cavity, and a plurality of third heat dissipation openings are evenly arranged on a cavity wall of the fourth air outlet cavity close to the battery module.

6. The battery pack box air duct according to claim 5, characterized in that: The middle partition, the first air outlet cavity, the second air outlet cavity, the third air outlet cavity and the fourth air outlet cavity form a stepped groove at the bottom of the cavity of the box body, and the lower end surface of the battery module is fixedly arranged in the stepped groove.

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