CN211556075U - Battery cooling device adopting double-channel airflow - Google Patents

Abstract

The utility model relates to a lithium ion power battery heat dissipation technical field especially relates to a battery cooling device that adopts binary channels air current, and its binary channels include unit, fan, aviation baffle A and aviation baffle B, the unit front end is equipped with fan, fan two, the unit rear end is equipped with the grid, the upper portion of unit bottom is equipped with the base plate, the lithium cell is placed on the upper portion of base plate, is located the aperture on the base plate of lithium cell middle part position; the front portion of lithium cell is equipped with the aviation baffle A perpendicular with the unit side, be equipped with the aperture of distribution rule and symmetry on the aviation baffle A, the middle part of lithium cell is equipped with the aviation baffle B parallel with unit side apron, the utility model discloses guaranteeing under the prerequisite that group battery volume, battery quantity and fan quantity are the same with former group battery, can provide lower temperature and more even temperature distribution, be favorable to designing long-lived, the high performance lithium ion battery of high reliability.

Description

A battery cooling device using dual-channel airflow

technical field

The utility model relates to the technical field of heat dissipation of lithium ion power batteries, in particular to a battery cooling device adopting dual-channel airflow.

Background technique

Lithium-ion batteries have the advantages of high voltage, low self-discharge rate, and high energy density, and are widely used in electric vehicles, hybrid vehicles, and civil avionics systems. The application of Li-ion batteries is greatly limited by the requirements of safety and long-term stability. Overheating the battery can also exacerbate this temperature non-uniformity, thereby accelerating battery degradation, reducing battery capacity, and even causing fires and explosions. Therefore, higher requirements are placed on the stability and safety of the thermal management system of lithium-ion batteries.

The thermal problem of large lithium-ion power batteries has always been a bottleneck restricting the development of electric vehicles. Li-ion batteries have the advantages of high energy density and long cycle life, and have great application potential in electric vehicles. However, since the performance and lifetime of Li-ion batteries are very temperature sensitive, it is important to maintain an appropriate temperature range. Local overheating and large temperature changes during charge and discharge remain key challenges for lamination. In order to solve the lack of innovative cooling mechanism to improve the non-uniformity of battery temperature in reality, this device is designed for this situation.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and to provide a battery cooling device using dual-channel airflow, which can improve the performance of the lithium battery, disperse the heat of the lithium ion battery, make its temperature distribution uniform, and improve the lithium ion battery. Group temperature uniformity.

In order to realize the purpose of the present utility model, the technical scheme adopted by the present utility model is:

The utility model discloses a battery cooling device adopting dual-channel airflow, which comprises a unit, a No. 1 fan, a No. 2 fan, an air guide plate A and an air guide plate B. The front end of the unit is provided with a No. 1 fan and a No. 2 fan. The rear end of the unit is provided with a grille, the upper part of the bottom end of the unit is provided with a base plate, a lithium battery is placed on the upper part of the base plate, and a small hole is arranged on the base plate at the middle position of the lithium battery; There is a wind deflector A perpendicular to the side of the unit, the wind deflector A is provided with regularly distributed and symmetrical small holes, and the middle of the lithium battery is provided with a wind deflector B parallel to the side cover of the unit.

The base plate separating unit is divided into two parts to form a conventional air duct and a vertical turning air duct; the No. 1 fan and the No. 2 fan are respectively located at the entrance of the conventional air duct and the vertical turning air duct.

Inside the vertical turning air duct and located directly below the lithium battery, a group of air guide plates with small holes are arranged at regular intervals. .

The number of fans at the entrance of the conventional air duct and the entrance of the vertical turning air duct can be increased according to actual needs.

The beneficial effects of the present utility model are:

1. The utility model is described in order to realize low energy consumption and increase the service life of the battery;

2. The utility model can increase the number of installed fans according to actual needs, and the cooling air in each channel can be provided by one or more fans.

Description of drawings

Figure 1 is a structural model diagram of a battery;

Fig. 2 is the three-dimensional structure schematic diagram of the utility model;

Figure 3 is a side view of the utility model.

In the figure, 1. Unit; 2. Fan No. 1; 3. Fan No. 2; 4. Air deflector A; 5. Air deflector B; 6. Base plate; 7. Grille; 8. Lithium battery; 9. Conventional Air duct; 10. Vertical turning air duct.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

See Figures 1-3.

The utility model discloses a battery cooling device using dual-channel airflow, comprising a unit 1, a No. 1 fan 2, a No. 2 fan 3, an air guide plate A 4 and an air guide plate B 5. The front end of the unit 1 is provided with a No. 1 fan Fan 2, No. 2 fan 3, the rear end of the unit 1 is provided with a grille 7, the upper part of the bottom end of the unit 1 is provided with a base plate 6, the upper part of the base plate 6 is placed with a lithium battery 8, and the battery 8 is located in the middle of the lithium battery 8. The base plate 6 is provided with small holes; the front part of the lithium battery 8 is provided with an air guide plate A 4 that is perpendicular to the side of the unit 1, and the air guide plate A 4 is provided with regularly distributed and symmetrical small holes. The middle part of the lithium battery 8 is provided with an air guide plate B 5 parallel to the side cover plate of the unit 1. By setting small holes on the air guide plate, the air distribution is more uniform; Under the premise of the same number as the primary battery pack, it can provide lower temperature and more uniform temperature distribution, which is conducive to the design of high-performance lithium-ion batteries with long life and high reliability.

The base plate 6 separates the unit 1 into two parts, forming a conventional air duct 9 and a vertical turning air duct 10;

Inside the vertical turning air duct 10 and located directly below the lithium battery 8, a group of air guide plates with small holes are arranged at regular intervals. It is porous, and when the airflow flows into the middle position, it turns sharply and vertically, and most of the airflow is ejected from the small holes of the substrate, which reduces the heat of the intermediate battery.

The number of fans at the entrance of the conventional air duct 9 and the entrance of the vertical turning air duct 10 can be increased according to actual needs.

working principle:

First, cooling air is drawn in from the outside environment through the intake grill 7 and then flows to the cooling battery cells. The fan is installed on the other side of the grille 7 inlet. Figure 3 is a schematic diagram of a bidirectional airflow cooling mechanism. One of them uses fan number one 2 to draw air into the regular channel 9 from one side of the package. The cooling air first flows through the air deflector A4, and the air deflector A4 has many small holes of different shapes, so that the air distribution is more uniform and suitable. Then, the air cools the lithium battery 8 in sequence, and finally flows out from the outlet of the grille 7 . The other air duct is located at the bottom of unit 1 and uses the second fan 3 to draw in cooling air. The air flows through the bottom vertical turning air duct 10 which is independent from the conventional duct 9 . When the air reaches the bottom of the battery that needs centralized cooling, the air is sprayed from the hole along the height direction of the battery and flows upward until it meets the guide plate B 5 parallel to the cover plate, so that the sprayed air flows in the horizontal direction. The jet then merges with the air in the conventional channel and flows out with the air from fan No. 1 at the grille outlet. Using jet cooling can greatly reduce the heat storage of the intermediate cells. At the same time, the heat conduction between the substrate 6 and the lithium-ion battery 8 is enhanced by inputting cooling air in the bottom vertical turning channel 10 . In addition, two independent air ducts improve the efficiency of the fan, and the airflow direction in this device is shown in Figure 3.

The above are only the embodiments of the present utility model, and are not intended to limit the scope of the present utility model's patent. Any equivalent transformation made by using the contents of the present utility model description and accompanying drawings or directly or indirectly applied in the relevant technical fields are the same. Included in the scope of patent protection of the present invention.

Claims (4)

1. A battery cooling device using dual-channel airflow, characterized in that it comprises a unit (1), a No. 1 fan (2), a No. 2 fan (3), an air deflector A (4) and an air deflector B ( 5), the front end of the unit (1) is provided with a No. 1 fan (2) and a No. 2 fan (3), the rear end of the unit (1) is provided with a grill (7), and the upper part of the bottom end of the unit (1) A base plate (6) is provided, a lithium battery (8) is placed on the upper part of the base plate (6), and a small hole is provided on the base plate (6) at the middle position of the lithium battery (8); A wind deflector A (4) perpendicular to the side of the unit (1) is provided in the part, the air deflector A (4) is provided with regularly distributed and symmetrical small holes, and the middle of the lithium battery (8) is provided with Air deflector B (5) parallel to the side cover of the unit (1). 2. A battery cooling device using dual-channel airflow according to claim 1, wherein the base plate (6) separates the unit (1) into two parts, forming a conventional air duct (9) and a vertical turning air duct. The No. 1 fan (2) and the No. 2 fan (3) are respectively located at the entrance of the conventional air duct (9) and the entrance of the vertical turning air duct (10). 3. A battery cooling device using dual-channel airflow according to claim 2, characterized in that: a set of interval arrangement rules are arranged inside the vertical turning air duct (10) and located directly below the lithium battery (8). The wind deflector with small holes, the wind deflector at the middle position is a single hole, and the wind deflector on both sides is multi-hole. 4. A battery cooling device using dual-channel airflow according to claim 2, wherein the number of fans at the entrance of the conventional air duct (9) and the entrance of the vertical turning air duct (10) can be adjusted according to actual conditions. Increase in demand.

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