CN209948003U - A three-layer distributed battery module cooling device with fins - Google Patents

Abstract

A three-layer distributed battery module heat dissipation device with fins, which has an inner and outer three-layer structure, and includes an innermost layer of an integral heat dissipation inner frame (10) for fixedly accommodating battery cells (4), and an anti-collision layer in the middle layer. A shock-absorbing foam aluminum frame (5), the outermost thermally conductive shell (6); and a waterproof and dustproof thermally conductive silicone cover pad (9) and heat dissipation fins. An inner shell cover (3) is arranged on the heat dissipation inner frame, and an outer shell top cover (2) is arranged on the inner shell cover. The device of the utility model utilizes the direct contact heat dissipation of the inner layer heat dissipation frame and the fins to quickly dissipate the heat generated by the battery during operation, and then uses the air duct and the heat dissipation fins to form convection heat dissipation, which effectively improves the heat dissipation efficiency, thereby optimizing the heat dissipation of the battery module. Balanced. The device of the utility model adopts a three-layer distributed structure, has high heat dissipation efficiency, light weight, good sealing performance, waterproof and dustproof, good insulation, easy processing and excellent safety performance.

Description

A three-layer distributed battery module cooling device with fins

technical field

The utility model relates to a three-layer distributed battery module cooling device with fins, which belongs to the technical field of battery cooling.

Background technique

With the development of new energy, electric vehicles have also been vigorously developed in recent years. As the energy supply and energy storage components of electric vehicles, the performance and service life of power batteries directly affect the performance and competition of power vehicles. force. Among many power batteries, lithium-ion batteries have become a hot spot in power battery research due to their high specific energy, high output power, and no memory effect.

In the new energy vehicle market, no matter what form of power battery is used, the power, safety and working life of the vehicle must be guaranteed. Thermal issues such as thermal safety, thermal reliability and thermal balance during power battery operation are an important factor restricting the performance of electric vehicles. In practical applications, in order to meet people's requirements for the power performance and endurance of electric vehicles, battery cells are often connected in series and parallel to form high-power, large-capacity power batteries. When electric vehicles are actually driving, they often experience different service conditions, and the power battery also experiences different rates of discharge. However, with the increase of the discharge rate, the temperature rise rate of the battery cells is accelerated, and the battery pack is prone to occur. The accumulation of internal heat and the unbalanced heat dissipation among the battery cells affect the performance of the vehicle and the service life of the battery. In severe cases, it is easy to cause thermal runaway, resulting in spontaneous combustion, explosion and other dangerous situations. For lithium-ion power batteries, the optimal operating temperature range is 20-45 °C, and the maximum temperature difference between battery cells is not higher than 5 °C. Therefore, the thermal design of the power battery and the arrangement of the heat dissipation structure are very important to the performance of the battery. At the same time, under any working conditions, the power battery needs to be waterproof and dustproof, and avoid collisions, so as to improve the safety performance of the power battery.

SUMMARY OF THE INVENTION

The purpose of the present utility model is to provide a three-phase finned battery pack in order to solve the problems of internal temperature accumulation, unbalanced heat dissipation and low heat dissipation efficiency, and waterproof, dust-proof, and collision-proof battery modules when the battery module works under the condition of air cooling. Layer distributed battery module cooling device.

The technical solution realized by the present invention is as follows, a three-layer distributed battery module heat dissipation device with fins, the device has an inner and outer three-layer structure, and includes an innermost layer of an integral heat dissipation inner frame that fixedly accommodates battery cells , an anti-collision and shock-absorbing foam aluminum frame in the middle layer, a thermally conductive shell on the outermost layer; and a waterproof and dustproof thermal conductive silicone cover pad and heat dissipation fins; the surface of the foam aluminum frame is coated with heat dissipation material.

The material of the heat dissipation inner frame is aluminum alloy; its shape is the same as that of the battery cell; the thickness of the longer sides of the heat dissipation inner frame is 0.8~2mm; the thickness of the shorter sides of the heat dissipation inner frame is 2~4mm; A heat-conducting inner shell cover is provided at the upper opening of the heat-dissipating inner frame.

The foam aluminum frame is arranged on the outer side of the heat dissipation inner frame, the shape is the same as the heat dissipation inner frame, and the thickness is 2~3mm; the material of the foam aluminum frame is closed-cell foam aluminum with a porosity of 80-90%; the foam Long and thin openings are designed on both sides of the longer end of the aluminum frame, corresponding to the spacing between the cells of the heat dissipation inner frame, and the size of the outer frame is 145mm×2mm.

The material of the heat-conducting shell is made of aluminum alloy, the shape is the same as that of the aluminum foam frame, and the thickness is 3-4mm; the inner wall of the heat-conducting shell is closely fitted with the aluminum foam frame; The diameter is 2~3mm, the bottom is fixed with screws, the top is extended, and there are divided screw holes.

The heat dissipation fins are made of aluminum alloy material; the slender openings designed by the heat conduction shell and the foam aluminum frame are directly attached to the wall surface of the heat dissipation inner frame, and are arranged in the direction of the air duct to dissipate heat deeply; the contact surface between the heat dissipation fins and the heat dissipation inner frame The size of the fin is 145×2mm, the straight extension length is 5~8mm, the corner extension length is 6~10mm, and the corner angle is 10°~45°.

The heat-dissipating fins are connected with the heat-conducting shell through the bayonet to fix it; the upper end of the top cover of the heat-conducting shell is provided with a positive terminal and a negative terminal, which are coated with insulating material; There are screw holes, which are sealed and fixed by the top cover fixing screws; the base of the thermal conductive shell is provided with screw holes, and the base fixing screws are used for sealing and fixing.

The battery cells are square, and are directly placed in the integral heat dissipation inner frame without other fixing devices.

The thermally conductive silicone cover pad is closely attached to the single battery and the heat dissipation inner frame, and adopts a stepped attachment, and the material is XK-P80 or XK-P60, and the thickness is 0.3~1mm.

The thermally conductive inner shell cover is closely fitted with the foamed aluminum frame and the thermally conductive silicone pad cover, and is fitted in a stepped manner, the material is copper alloy, and the thickness is 0.5-2mm.

The heat dissipation frame and the anti-collision and shock-absorbing foam aluminum frame are both assembled and matched, and if one of the heat dissipation parts fails, it can be disassembled and replaced separately.

The working principle of the utility model is that the utility model adopts the direct contact heat dissipation, the heat generated by the battery cell is rapidly dissipated, and then the convection heat dissipation is formed by the air duct and the radiating fin, and the end of the radiating fin is in the downwind duct. The direction is at a certain angle, which effectively improves the heat dissipation efficiency, thereby optimizing the heat dissipation of the battery module and improving the reliability, safety and service life of the battery.

The beneficial effect of the utility model is that the device adopts a three-layer distributed heat dissipation method combining air ducts and fins for heat dissipation, and uses the inner layer heat dissipation frame and the fins for direct contact heat dissipation, so that the heat generated during the operation of the battery can be quickly exported. The air duct and the heat dissipation fins are used to form convection heat dissipation, which effectively improves the heat dissipation efficiency, thereby optimizing the heat dissipation balance of the battery module. At the same time, the fins have a certain difference in draft thickness, and the ends are at a certain angle in the direction of the downwind channel, which enhances the heat dissipation effect and improves the compactness of the device. The foam aluminum frame in the device of the utility model has the excellent characteristics of low density, light weight, high impact absorption capacity, strong fire resistance, excellent heat dissipation performance and high strength; it can improve the lightweight of the battery pack and improve the safety of the battery at the same time. Anti-collision function.

The device of the utility model adopts a three-layer distributed structure, has high heat dissipation efficiency, light weight, good sealing performance, waterproof and dustproof, good insulation, easy processing and excellent safety performance.

Description of drawings

FIG. 1 is a schematic diagram of the appearance of a three-layer distributed battery module cooling device with fins according to the present invention;

2 is a front view of a three-layer distributed battery module cooling device with fins of the present invention;

3 is a left side view of a three-layer distributed battery module heat sink with fins of the present invention

FIG. 4 is a schematic view of the appearance of the heat sink;

FIG. 5 is a schematic diagram of a heat-conducting housing of a heat-dissipating device;

6 is a schematic diagram of a heat dissipation fin of a heat dissipation device;

In the figure: 1 is the top cover fixing screw; 2 is the top cover of the thermally conductive outer shell; 3 is the thermally conductive inner shell cover; 4 is the battery cell; 5 is the foam aluminum frame; 6 is the thermally conductive outer shell; 7 is the base fixing screw; 8 is the base Screw hole; 9 is thermal conductive silicone cover pad; 10 is heat dissipation inner frame; 11 is slender opening; 12 is heat dissipation slot; 13 is heat conduction fin; 14 is positive terminal; 15 is negative terminal; 16 is heat dissipation fin Bottom; 17 is the end of the cooling fin; 18 is the angle between the end of the cooling fin and the bottom; 19 is the draft end face of the cooling fin; 20 is the chamfer; 21 is the bayonet; 23 is the top cover screw hole.

Detailed ways

The specific embodiment of the present invention is shown in FIG. 1 .

This embodiment is a three-layer distributed battery module heat dissipation device with fins, which has an inner and outer three-layer structure, and includes an innermost layer of an integral heat dissipation inner frame 10 for fixedly accommodating battery cells, and a middle layer of anti-collision and shock absorption. Foamed aluminum frame 5, outermost thermally conductive shell 6; and waterproof and dustproof thermally conductive silicone cover pad 9 and heat dissipation fins 13.

In this embodiment, a square power battery is used as an example for description. The heat dissipation device of the battery module is in a square shape, the surface of the outer heat-conducting shell 6 is designed in the form of a heat-dissipating groove, and the heat-dissipating fins 13 are arranged on both sides of the heat-conducting shell 6. The fins 13 form convection heat dissipation with the external air duct, and quickly dissipate the heat generated inside the battery.

As shown in FIG. 2 and FIG. 3 , the finned three-layer distributed battery module heat dissipation device includes a three-layer structure, the innermost layer is the battery module heat dissipation inner frame 10 , and the single battery 4 can be directly Inserted and placed, the heat dissipation inner frame 10 is made of aluminum alloy with good thermal conductivity. Due to the close fit, the heat generated by the battery cell can be quickly transferred to the frame to avoid the accumulation of the internal temperature of the battery module; the middle layer is The foamed aluminum frame 5, the surface of the foamed aluminum frame 5 is coated with heat dissipation material, the inner side of the foamed aluminum frame 5 is directly attached to the heat dissipation inner frame 10, and the two sides of the foamed aluminum frame 5 are designed with elongated openings 11, as shown in Figure 4 The outer layer is a heat-conducting frame 6, and the two sides and the bottom of the heat-conducting frame 6 are designed in the form of heat-dissipating grooves 12, as shown in FIG. 5; The internal heat of the heat dissipation inner frame 10 can be exported, and the internal heat generated by the battery cell 4 can be introduced into the external environment through internal heat transfer and external convection heat dissipation, so as to improve the heat dissipation efficiency and improve the balance of heat dissipation;

As shown in FIG. 2 , a three-layer distributed battery module heat dissipation device with fins in this embodiment is fixed by the bottom of the heat-conducting shell 6 , and at the upper end of the shell, there are two layers of shell covers and an outer top cover 2 and the inner shell cover 3, and a thermally conductive silica gel cover gasket 9 is arranged between the inner shell cover 3 and the heat dissipation inner frame 10 to ensure the sealing and insulation of the battery module.

As shown in FIG. 6 , the ends 17 of the heat dissipation fins and the bottom 16 of the heat dissipation fins are at a certain angle, within 10°~45°, and are arranged down the air duct. The ends 17 of the heat dissipation fins have a certain draft height, so that the heat dissipation fins are The thickness of the end 17 and the bottom 16 of the heat dissipation fins is different, which improves the heat dissipation efficiency and the compactness of the structure arrangement.

The present invention adopts direct contact heat dissipation. As shown in FIG. 3 , the heat generated by the battery cells 4 is quickly dissipated during operation, and then the air duct and the heat dissipation fins 13 form convection heat dissipation. The direction of the channel is at a certain angle, which effectively improves the heat dissipation efficiency, thereby optimizing the heat dissipation of the battery module and improving the reliability, safety and service life of the battery.

The above-mentioned embodiments are preferred implementations of the present invention. However, the embodiments of the present invention are not limited by the above examples. Any modification, substitution, combination or simplification made to the shape or structure of the device by the above-mentioned method of the present invention within the spirit and principle of the present invention falls within the protection scope of the present invention.

Claims (10)

1. A three-layer distributed battery module heat dissipation device with fins is characterized in that, the device is in an inner and outer three-layer structure, comprising the innermost layer of the integral heat dissipation inner frame for accommodating battery cells, and the middle layer. The anti-collision and shock-absorbing foam aluminum frame, the outermost thermal conductive shell; and the waterproof and dustproof thermal conductive silicone cover pad and the heat dissipation fin; the surface of the foam aluminum frame is coated with heat dissipation material. 2 . The three-layer distributed battery module heat dissipation device with fins according to claim 1 , wherein the heat dissipation inner frame material is aluminum alloy; its shape is the same as that of a battery cell; the heat dissipation The thickness of the longer sides of the inner frame is 0.8-2mm; the thickness of the shorter sides of the heat-dissipating inner frame is 2-4mm; the upper opening of the heat-dissipating inner frame is provided with a heat-conducting inner shell cover. 3. The finned three-layer distributed battery module heat dissipation device according to claim 1, wherein the foamed aluminum frame is arranged on the outside of the heat dissipation inner frame, the shape is the same as the heat dissipation inner frame, and the thickness is the same as that of the heat dissipation inner frame. 2-3mm; the material of the foamed aluminum frame is closed-cell foamed aluminum with a porosity of 80-90%; elongated openings are designed on both sides of the longer end of the foamed aluminum frame, which is a single body with the heat dissipation inner frame The interval between the batteries corresponds, and the frame size is 145mm × 2mm. 4. The finned three-layer distributed battery module heat dissipation device according to claim 1, wherein the material of the thermally conductive shell is aluminum alloy, the shape is the same as that of the foamed aluminum frame, and the thickness is 3- 4mm; the inner wall of the heat-conducting shell is closely attached to the foam aluminum frame; at the same time, the left and right sides and the bottom are designed in the form of heat dissipation grooves, the diameter of the heat dissipation groove is 2-3mm, the bottom is fixed with screws, and the top is extended with separate screw holes. 5. A three-layer distributed battery module heat dissipation device with fins according to claim 1, wherein the heat dissipation fins are made of aluminum alloy materials; The long opening is directly attached to the wall surface of the heat dissipation inner frame, and it is arranged in the direction of the air duct to dissipate heat deeply; 10mm, the corner is 10°~45°, the extension of the fin corner is drafted, and the draft thickness is 1-3mm. 6 . The three-layer distributed battery module heat dissipation device with fins according to claim 1 , wherein the heat dissipation fins are linked with the heat conducting shell through a bayonet to fix it; the The upper end of the top cover of the heat-conducting shell is provided with a positive terminal and a negative terminal, which is coated with insulating material; the top cover of the heat-conducting shell is provided with screw holes, which are sealed and fixed by the top-cover fixing screws; the base of the heat-conducting shell is provided with screw holes , use the base fixing screws for sealing and fixing. 7 . The finned three-layer distributed battery module heat dissipation device according to claim 1 , wherein the battery cells are square and directly placed in the integral heat dissipation inner frame without other fixings. 8 . device. 8 . The three-layer distributed battery module heat dissipation device with fins according to claim 1 , wherein the thermally conductive silica gel cover pad is closely attached to the single battery and the heat dissipation inner frame, and adopts a stepped type. 9 . Fitting, the material is XK-P80 or XK-P60, and the thickness is 0.3-1mm. 9 . The three-layer distributed battery module heat dissipation device with fins according to claim 2 , wherein the thermally conductive inner shell cover is tightly fitted with the foamed aluminum frame and the thermally conductive silicone pad cover, and a ladder is used. 10 . The material is copper alloy and the thickness is 0.5-2mm. 10 . The finned three-layer distributed battery module heat dissipation device according to claim 1 , wherein the heat dissipation inner frame and the anti-collision and shock-absorbing foam aluminum frame are assembled and matched. One of the heat sinks is faulty and can be disassembled and replaced separately.

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