CN206532847U - A kind of air cooling equipment for adjusting power battery of pure electric automobile bag temperature - Google Patents

Abstract

The utility model relates to an air-cooling device for adjusting the temperature of a power battery pack of a pure electric vehicle, which comprises a box body and a box cover. A plurality of power battery packs are arranged in the box body, and each power battery pack includes a multi-layer battery pack arranged from top to bottom. The heat dissipation plate, the battery module and the heat dissipation integration are arranged at intervals between two adjacent heat dissipation plates, a plurality of temperature sensors are arranged on the heat dissipation plate, and air inlets and exhaust ports are arranged on the opposite sides of the box. Compared with the traditional power battery cooling device, the utility model has reasonable structural design and convenient installation and use. At the same time, the utility model has a more excellent heat dissipation effect, can greatly improve the heat dissipation efficiency of the power battery pack, and can realize reasonable temperature control for the power battery pack, avoiding the influence of uneven temperature caused by excessive local temperature of the power battery pack. In addition, the utility model can also be used in conjunction with the air-conditioning management system of the car, and has multiple ways of use.

Description

An air cooling device for adjusting the temperature of a pure electric vehicle power battery pack

technical field

The utility model relates to an air cooling device for adjusting the temperature of a power battery pack of a pure electric vehicle, which belongs to the technical field of battery thermal management.

Background technique

With the development of social economy, energy and environmental problems are becoming more and more serious. As an effective way to solve these problems, pure electric vehicles have ushered in unprecedented development opportunities. At present, the power battery has become the main component that restricts the development of pure electric vehicles, and the development level of power battery thermal management technology has a great impact on the service life and use effect of the power battery. The thermal management technology of pure electric vehicle power battery mainly includes the heat dissipation technology of power battery and the balance technology of heat dissipation. The existing heat dissipation method is mainly based on air cooling. Effective air ducts are designed to improve heat dissipation, and automatic control cannot be used to ensure uniform temperature distribution of the power battery pack. Especially when the power battery is discharged with high power for a long time, the temperature difference between different areas of the power battery will become larger and larger, which will reduce the use effect and service life of the power battery.

Chinese patent document CN103746153A discloses a cooling device for an ultra-large-capacity energy-storage lithium-ion battery pack, which includes a lithium-ion battery pack, a partition plate with water-cooled long fins, a water-cooled coil wall, a fan, and a battery box. A water-cooled coil wall is arranged vertically between two adjacent rows of battery packs in the battery box, and a separator water-cooled long fin is arranged horizontally between two adjacent layers of lithium-ion battery packs. The lithium-ion battery pack is placed on the separator water-cooled long The fins are supported and fixed by the water-cooled long fins of the clapboard; a fan is installed on each layer of each row of battery packs for air supply to accelerate heat dissipation; by adding clapboard water-cooled long fins and water-cooled coil The wall and the fan solve the heat dissipation problem of the ultra-large capacity battery pack. This patent mainly solves the heat dissipation problem of super-large-capacity energy storage lithium-ion batteries, but it is not suitable for the temperature regulation of pure electric vehicle power battery packs, because the temperature difference that needs to be controlled by pure electric vehicle power battery packs is relatively high, not only for heat dissipation To solve the problem, it is also necessary to ensure that the temperature of the power battery pack is evenly distributed.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides an air-cooling device for adjusting the temperature of the power battery pack of a pure electric vehicle. On the one hand, the air-cooling device can meet the heat dissipation and cooling requirements of the power battery pack; During the process, the cooling fan is controlled by the battery management unit to automatically reduce the temperature difference to ensure that the temperature of the power battery pack is evenly distributed in the working state.

The technical scheme of the utility model is as follows:

An air cooling device for adjusting the temperature of a pure electric vehicle power battery pack, including a box body and a box cover, the box cover is detachably connected to the box body, and a plurality of power battery packs are arranged in the box body, and each power battery pack consists of an upper The multi-layer cooling plate is arranged on the bottom, and the battery module and heat dissipation integration are arranged between two adjacent layers of cooling plates. There are multiple temperature sensors on the cooling plate, and the two sides of the box are equipped with air inlet and exhaust. mouth.

Preferably, the heat dissipation integration includes two heat dissipation fin integrations and a heat dissipation fan, and the heat dissipation fan is arranged between the two heat dissipation fin integrations and connected with the heat dissipation fin integration.

Preferably, the heat dissipation fin assembly is mainly composed of four heat dissipation fin units, and the four heat dissipation fin units form a rectangular parallelepiped heat dissipation fin assembly, and each heat dissipation fin unit includes a plurality of heat dissipation fins arranged side by side, each The end faces of each cooling fin unit are isosceles triangles, and the shape of each cooling fin unit is a triangular prism. The advantage of this design is that the end face of the cooling fin unit is an isosceles triangle, that is, the fins in the middle are long, and the fins on both sides gradually become shorter. This targeted design is mainly to solve the problem of excessive temperature in the middle of the battery module. , The extended fins in the middle can more effectively accelerate the heat dissipation.

Preferably, the cooling fan includes a connecting shell and a motor, the motor is fixed in the center of the connecting shell through a support frame, a main air outlet is arranged on one side of the connecting shell, and side air outlets are arranged around the connecting shell. The advantage of this design is that the fins integrated with the heat dissipation fins can dissipate heat more evenly, and at the same time, the tuyere can enhance heat dissipation and reduce the mass of the heat dissipation device.

Preferably, each power battery pack includes five layers of heat sinks arranged from top to bottom, five battery modules and four heat sinks are arranged at intervals between two adjacent layers of heat sinks, and adjacent battery modules and heat sinks are integrated A heat-conducting silica gel layer is arranged between them.

Preferably, the plurality of temperature sensors are evenly distributed in the center of the battery module.

Preferably, two sides of the box body are oppositely provided with cooling fins, and two sides adjacent to the cooling fins are oppositely provided with two air inlets and two exhaust ports.

Preferably, both the air inlet and the outlet are provided with internal threads. The advantage of this design is that the air inlet and outlet can not only perform natural heat exchange, but also connect the pipe interface to use the air conditioning system for heat dissipation.

Preferably, the inner bottom surface of the box is provided with multiple rows of support frames, and elastic bayonets are provided at both ends of the support frames. The advantage of this design is that the support frame is used to fix the power battery pack. On the one hand, it ensures the stability of the power battery pack during the driving of the vehicle; uneven temperature.

Preferably, six power battery packs are arranged side by side in the box, and the six power battery packs are placed on the support frame.

The beneficial effects of the utility model are:

Compared with the traditional power battery cooling device, the air cooling device of the utility model has reasonable structural design and convenient installation and use. At the same time, the utility model has a more excellent heat dissipation effect, can greatly improve the heat dissipation efficiency of the power battery pack, and can realize reasonable temperature control for the power battery pack, avoiding the influence of uneven temperature caused by excessive local temperature of the power battery pack. In addition, the utility model can also be used in conjunction with the air-conditioning management system of the car, and has multiple ways of use. The utility model has obvious functions and effects, and is worthy of popularization and application.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the battery box;

Figure 2 is a schematic diagram of the internal layout of the battery box in the state of no cover;

Fig. 3 is a schematic diagram of the structure of the battery box;

Fig. 4 is a schematic structural diagram of a power battery pack;

FIG. 5 is a schematic diagram of a heat dissipation integrated structure;

Fig. 6 is a structural schematic diagram of a cooling fan;

FIG. 7 is a schematic diagram of the integrated structure of heat dissipation fins;

Figure 8 is a front view of the integration of cooling fins;

Among them: 1. Box cover; 2. Box body; 3. Power battery pack; 4. Box shell; 5. Support frame; 6. Exhaust port; 7. Cooling fins; 8. Air inlet; 9. Cooling plate ;10. Battery module; 11. Heat dissipation integration; 12. Temperature sensor; 13. Heat dissipation fin integration; 14. Cooling fan; 15. Connection shell; 16. Side air outlet; 17. Motor; 18. Main air outlet; support frame.

detailed description

The utility model will be further described below through the embodiments in conjunction with the accompanying drawings, but not limited thereto.

Example 1:

As shown in Figures 1 to 8, this embodiment provides an air cooling device for adjusting the temperature of the power battery pack of a pure electric vehicle, including a box body 2 and a box cover 1, the shape of the box body is a cuboid, the box cover 1 and the box body 2 A battery box for placing power battery packs is formed by connecting bolts and nuts. Six power battery packs 3 are arranged side by side in the box body 2, and each power battery pack 3 includes a five-layer cooling plate 9 arranged from top to bottom. Five battery modules 10 and four heat dissipation integrations 11 are arranged at intervals between the heat dissipation plates. The heat conduction is enhanced by applying thermal conductive silica gel between the battery modules and the heat dissipation integration, and adhesive connection is used. The battery module and heat dissipation integration and heat dissipation The contact side of the board is also coated with thermally conductive silicone and glued around the sides. Thirty temperature sensors 12 are arranged on the surface of each heat dissipation plate, and air inlets 8 and exhaust outlets 6 are arranged on opposite sides of the box body.

Wherein, the heat dissipation assembly 11 includes two heat dissipation fin assemblies 13 and a heat dissipation fan 14, and the heat dissipation fan 14 is arranged between the two heat dissipation fin assemblies and is glued to the heat dissipation fin assembly.

The heat dissipation fin assembly 13 is mainly composed of four heat dissipation fin units, and the four heat dissipation fin units form a rectangular parallelepiped heat dissipation fin assembly 13, each heat dissipation fin unit includes a plurality of heat dissipation fins arranged side by side, each heat dissipation fin The end surface of the sheet unit is an isosceles triangle, that is, the heat dissipation fin in the middle is the longest, and the heat dissipation fins on both sides are shortened successively.

The cooling fan 14 includes a connecting shell 15 and a motor 17, the motor 17 is fixed on the inner center of the connecting shell 15 by a support frame 19, a circular main air outlet 18 is arranged on one side of the connecting shell 15, and the surroundings of the connecting shell 15 (on the four side walls) An elliptical side air outlet 16 is provided.

The 30 temperature sensors on the cooling plate are divided into 5 columns, with 6 temperature sensors in each column, and the 6 temperature sensors in each column are located at the center of a group of battery modules. As shown in Figure 4.

The inner bottom surface of the box body is provided with 9 rows of support frames, and the two ends of the support frame are provided with elastic bayonets. The power battery pack is placed on the support frame and clamped by the elastic bayonets at both ends. The support frame is used to fix the power battery pack. On the one hand, it ensures the stability of the power battery pack during vehicle driving. On the other hand, there is a gap between the power battery pack and the bottom surface of the box to avoid temperature unevenness caused by overheating at the bottom of the power battery pack.

In actual use, all power battery packs are electrically connected through the circuit system to provide electric energy for the car to drive, and the entire air cooling device can be placed in the car battery compartment or connected to the bottom of the car through the box cover.

Example 2:

As shown in Figure 3, an air cooling device for adjusting the temperature of the power battery pack of a pure electric vehicle has the structure as described in Embodiment 1, the difference is that the two sides of the box body 2 are provided with cooling fins 7 opposite to each other, Two air inlets 8 and two air outlets 6 are oppositely arranged on the two sides adjacent to the cooling fins 7 (that is, the other two sides of the box body 2 ).

Example 3:

An air cooling device for adjusting the temperature of a power battery pack of a pure electric vehicle, the structure is as described in Embodiment 1, the difference is that both the air inlet 8 and the exhaust port 6 are provided with internal threads (not shown in the figure). The air inlet and exhaust port can not only perform natural heat exchange, but also connect the pipe interface to use the air conditioning system to dissipate heat.

Example 4:

A method for using an air cooling device for adjusting the temperature of a pure electric vehicle power battery pack, comprising the following steps:

The whole device is placed in the car battery room or connected to the bottom of the car through the case cover. The air inlet 8 faces the direction that the car advances or connects the air inlet and the exhaust port with the car air conditioning system through a pipeline. The cooling fan 14 and the temperature sensor 12 are connected with The battery management unit of the car is electrically connected; when the car is running, the temperature sensor 12 collects the temperature value of the power battery pack 3 in real time and transmits it to the battery management unit, and the battery management unit controls the speed and steering of each cooling fan 14 according to the built-in program , so that the temperature of the power battery pack 3 is maintained within the range set by the program.

Claims (10)

1. An air cooling device for adjusting the temperature of a pure electric vehicle power battery pack, comprising a box body and a box cover, the box cover is detachably connected to the box body, and is characterized in that a plurality of power battery packs are arranged in the box body, each The power battery pack includes a multi-layer heat dissipation plate arranged from top to bottom. The battery module and heat dissipation integration are arranged between two adjacent heat dissipation plates. There are multiple temperature sensors on the heat dissipation plate. Two sides of the box are set There are air inlets and exhaust outlets. 2. The air cooling device for adjusting the temperature of the pure electric vehicle power battery pack according to claim 1, wherein the heat dissipation integration includes two heat dissipation fin integrations and a heat dissipation fan, and the heat dissipation fan is arranged on the two heat dissipation fins. between the integrated and integrated with the cooling fins. 3. The air cooling device for adjusting the temperature of the pure electric vehicle power battery pack as claimed in claim 2, wherein the heat dissipation fin integration is mainly composed of four heat dissipation fin units, and the four heat dissipation fin units form one The cuboid heat dissipation fins are integrated, each heat dissipation fin unit includes a plurality of heat dissipation fins arranged side by side, the end face of each heat dissipation fin unit is an isosceles triangle, and the shape of each heat dissipation fin unit is a triangular prism. 4. The air-cooling device for adjusting the temperature of the pure electric vehicle power battery pack as claimed in claim 2, wherein the heat dissipation fan includes a connecting shell and a motor, the motor is fixed to the inner center of the connecting shell through a support frame, and the connecting shell A main air outlet is arranged on one side, and side air outlets are arranged around the connecting shell. 5. The air-cooling device for adjusting the temperature of the pure electric vehicle power battery pack according to claim 1, wherein each power battery pack includes five layers of cooling plates arranged from top to bottom, and between two adjacent layers of cooling plates There are five battery modules and four cooling integrations arranged at intervals, and a heat-conducting silicone layer is arranged between adjacent battery modules and cooling integrations. 6. The air cooling device for adjusting the temperature of the power battery pack of a pure electric vehicle according to claim 1, wherein the plurality of temperature sensors are evenly distributed at the center of the battery module. 7. The air cooling device for adjusting the temperature of the power battery pack of pure electric vehicles according to claim 1, wherein the two sides of the box body are oppositely provided with cooling fins, and the two sides adjacent to the cooling fins are opposite to each other. There are two air inlets and two air outlets. 8. The air cooling device for adjusting the temperature of the power battery pack of a pure electric vehicle according to claim 1, wherein the air inlet and the air outlet are both provided with internal threads. 9. The air cooling device for adjusting the temperature of the pure electric vehicle power battery pack according to claim 1, wherein the inner bottom surface of the box is provided with multiple rows of support frames, and elastic bayonets are provided at both ends of the support frames . 10. The air cooling device for adjusting the temperature of the pure electric vehicle power battery pack according to claim 9, wherein six power battery packs are arranged side by side in the box, and the six power battery packs are placed on the support frame.