A battery box with a high-efficiency cooling structure

Abstract

This invention provides a battery box with a high-efficiency cooling structure, comprising several layers of battery modules and a sidewall-mounted air conditioner disposed on one side of each battery module. A partition is provided between each layer of battery modules, extending to the sidewall-mounted air conditioner. The sidewall-mounted air conditioner has an air outlet and an air return outlet. An air supply rectifier box is provided on the air outlet, and air guide nozzles are provided on the air supply rectifier box, with the air guide nozzles corresponding to the top surface of the battery modules. Several deflector vanes are inclined below the partition, and the inclination direction of the deflector vanes is consistent with the air outlet direction of the air conditioner. This invention manages and optimizes airflow organization, increases the heat exchange efficiency between the modules and the air supply from the air conditioner, and reduces the module temperature.

Description

Technical Field

[0001] This invention belongs to the field of power battery thermal management technology, specifically relating to a battery box with a high-efficiency cooling structure. Background Technology

[0002] With the increasing prevalence of power batteries, research and development of power battery technology is receiving growing attention from researchers. Thermal management technology is a crucial aspect of this field. Excessively high or low temperatures directly impact battery lifespan and performance, potentially leading to safety issues. Furthermore, uneven temperature distribution within the battery pack can cause performance imbalances between modules and individual cells. Therefore, a battery thermal management system is essential for electric vehicle power battery systems. A reliable and efficient thermal management system is of paramount importance for the reliable and safe application of electric vehicles.

[0003] The existing battery enclosure uses a side-wall air conditioner to supply cooling to the battery enclosure. This device has the following disadvantages: a passage is formed between the air conditioner's supply air vent and the air return air vent. A large amount of cold air delivered from the supply air vent does not cool the battery modules and flows directly back to the air conditioner's return air vent, resulting in a large amount of cold air short-circuiting and thus a significant waste of cooling capacity.

[0004] Furthermore, the top surface of the module is the main heat dissipation surface, but due to the airflow direction and airflow resistance, the air conditioning fails to concentrate the cooling of the top surface of the module, resulting in a large amount of indirect waste of cooling capacity.

[0005] The existing solution has relatively small air volume and velocity on the top surface of the module, with some modules having a top surface air velocity close to zero. The module temperature is high, posing a significant risk of thermal runaway. Summary of the Invention

[0006] The purpose of this invention is to provide a battery box with a high-efficiency cooling structure, which manages and optimizes airflow organization, increases the heat exchange efficiency between the module and the air conditioning supply, and reduces the module temperature.

[0007] This invention provides the following technical solution:

[0008] A battery box with a high-efficiency cooling structure includes several layers of battery modules and a sidewall air conditioner disposed on one side of the battery modules. A partition is provided between each layer of battery modules, and the partition extends to the sidewall air conditioner. The sidewall air conditioner is provided with an air outlet and an air return outlet. An air supply rectifier box is provided on the air outlet, and an air guide nozzle is provided on the air supply rectifier box. The air guide nozzle is positioned corresponding to the top surface of the battery module. Several turbulence deflectors are inclined under the partition, and the inclination direction of the turbulence deflectors is consistent with the air outlet direction of the air conditioner.

[0009] Preferably, the air supply rectifier box is located next to the partition, and the air guide nozzle is located next to the corresponding upper partition of each layer.

[0010] Preferably, the air conditioner return vent corresponds to the battery module on the top layer.

[0011] Preferably, the air supply rectifier box is a multi-layer air supply rectifier box or a single-layer air supply rectifier box.

[0012] Preferably, the multi-layer air supply rectifier box includes a box body and a plurality of air guide nozzles disposed on the box body. The box body is located at the air conditioner outlet, and the air guide nozzles are flat nozzles. The flat nozzles correspond to the top surface of the battery module and are close to the upper layer of the partition.

[0013] Preferably, the single-layer air supply rectifier box includes two opposing side panels and a bottom plate connecting the side panels. The side panels are respectively located on both sides of the air conditioner outlet. One end of the side panel is connected to the partition, and the other end is connected to the bottom plate. The bottom plate is opposite to the partition and is inclined around the air conditioner outlet. The inclination of the bottom plate corresponds to the top surface of the battery module.

[0014] Preferably, each battery module has a guide plate on the top edge of the opposite side of the sidewall air conditioner, and the guide plate is inclined in the direction relative to the top surface of the battery module.

[0015] The beneficial effects of this invention are: the efficient cooling structure divides the battery box into one air supply path and one return air path, avoiding the phenomenon of cold air short circuit; the installation of the air supply rectifier box makes the cold air flow concentrated through the top surface of the module, increasing the heat exchange efficiency, making the airflow organization more reasonable, and the heat exchange efficiency between the module and the air supply of the air conditioner is higher, thus reducing the module temperature. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the multi-layer air supply rectifier box structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the single-layer air supply rectifier box structure of the present invention;

[0020] Figure 4 This is a front view schematic diagram of the partition structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the bottom structure of the partition plate of the present invention;

[0022] The following are labeled in the diagram: 1. Side-wall air conditioner; 2. Air conditioner return air vent; 3. Battery module; 4. Air supply rectifier box; 41. Box body; 42. Bottom nozzle; 43. Middle nozzle; 44. Top nozzle; 45. Side panel; 46. Bottom plate; 5. Bottom partition; 51. Partition; 52. Baffle; 6. Middle partition; 7. Top partition. Detailed Implementation

[0023] like Figure 1 , Figure 4 and Figure 5 As shown, a battery box with a high-efficiency cooling structure includes several layers of battery modules 3 and a side-wall air conditioner 1 located on one side of the battery modules 3. A partition 51 is provided between each layer of battery modules 3, extending to the side-wall air conditioner 1. The side-wall air conditioner 1 has an air outlet and an air return vent 2. The air return vent 2 corresponds to the top layer of battery modules 3 and performs return air operation. An air supply rectifier box 4 is provided on the air supply outlet, and an air guide nozzle is provided on the air supply rectifier box 4. The air guide nozzle corresponds to the top surface of the battery modules 3. The air supply rectifier box 4 is close to the partition 51, and the air guide nozzle is close to the corresponding upper partition 51 of each layer. A small turbulence deflector 52 is inclined downwards on the partition 51, and the inclination direction of the turbulence deflector 52 is consistent with the air outlet direction of the air conditioner. Furthermore, each battery module 3 has a guide plate on the top edge of the opposite side of the sidewall air conditioner 1. The guide plate is inclined towards the top surface of the battery module 3. The guide plate optimizes the airflow path and also reduces the system resistance.

[0024] like Figures 1-3 As shown, the air supply rectifier box 4 is either a multi-layer air supply rectifier box or a single-layer air supply rectifier box. The multi-layer air supply rectifier box includes a box body 41 and several air guide nozzles disposed on the box body 41. The box body 41 is located at the air conditioning outlet. The air guide nozzles are flat nozzles, which correspond to the top surface of the battery module 3 and are adjacent to the upper partition plate 51, as shown. Figure 2 As shown, there are three layers of partitions, including a bottom partition 5, a middle partition 6, and a top partition 7. Each layer corresponds to a bottom nozzle 42, a middle nozzle 43, and a top nozzle 44, respectively, which blocks the four layers of battery modules and divides the battery box into three air supply branches and one return air path, avoiding airflow short-circuiting. The single-layer air supply rectifier box includes two opposing side plates 45 and a bottom plate 46 connecting the side plates 45. The side plates 45 are respectively located on both sides of the air conditioning outlet. One end of the side plate 45 is connected to the partition 51, and the other end is connected to the bottom plate 46. The bottom plate 46 is opposite to the partition 51 and is inclined around the air conditioning outlet. The inclination of the bottom plate 46 corresponds to the top surface of the battery module 3, concentrating the air to the top surface of the module, increasing the heat exchange efficiency.

[0025] like Figures 1-5As shown, in the battery box with a high-efficiency cooling structure, during use, the air supply rectifier box 4 is used to rectify the air supply from the air conditioner and then distribute it to the top surface of the module through several branches. After rectification, the airflow direction is parallel to the top surface of the module, and the air velocity is relatively high, resulting in a high heat transfer coefficient and greatly increasing the heat transfer efficiency. After passing through the air supply branches, the air supply from the air conditioner converges at the far end to the top module space, cools the top module, and then flows back to the air conditioner return air vent 2. The partition 51 blocks the battery module 3, dividing the battery box into several air supply branches and one return air path, avoiding the phenomenon of airflow short-circuiting. The bottom plate of the partition 51 is equipped with baffles 52, and the baffles 52 are tilted in the same direction as the airflow. The baffles 52 can increase the disturbance of the airflow on the module surface, thereby increasing the convective heat transfer coefficient and improving the heat transfer efficiency. The baffles 52 can be adjusted in terms of installation density and installation angle according to specific project requirements, and can be arranged in a cross or parallel manner. Figure 4 and Figure 5 Arranged in a sequential order.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery box with a high-efficiency cooling structure, characterized in that, The device includes several layers of battery modules and a sidewall-mounted air conditioner located on one side of each battery module. A partition is provided between each layer of battery modules, extending to the sidewall-mounted air conditioner. The sidewall-mounted air conditioner has an air outlet and an air return vent. An air supply rectifier box is provided on the air outlet; this air supply rectifier box is a multi-layered air supply rectifier box, comprising a box body and several air guide nozzles on the box body. The box body is located at the air outlet, and the air guide nozzles are flat nozzles. These flat nozzles correspond to the top surface of the battery module and are adjacent to the uppermost partition. Several turbulence deflectors are inclined below the partition, with the inclination direction of the deflectors consistent with the air outlet direction of the air conditioner. The air supply rectifier box is adjacent to the partition. The air return vent corresponds to the top layer of the battery module.

2. The battery box with a high-efficiency cooling structure according to claim 1, characterized in that, Each battery module has a guide plate on the top edge of the opposite side of the sidewall air conditioner, and the guide plate is inclined in the direction relative to the top surface of the battery module.

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