CN206370456U - A kind of air-cooled battery bag - Google Patents

Abstract

The utility model relates to an air-cooled battery pack, which belongs to the technical field of batteries. The battery pack includes a box body and a battery pack arranged in the box body, the battery pack includes more than two battery modules sequentially arranged in the box along the horizontal direction at intervals, and a battery module is arranged between two adjacent battery modules An air duct extending in a vertical plane; an air outlet system is provided on the side wall of the box, and the air outlet system includes an air outlet connected to the air duct and an air outlet protection channel connected to the air outlet. One end of the protective channel is connected with the air outlet, and the other end is provided with an air outlet protective channel with the opening facing downward. The battery pack of the utility model is not easy to cause water or other substances to enter the inside of the battery pack, which greatly improves the protection level of the battery pack.

Description

An air-cooled battery pack

technical field

The utility model relates to an air-cooled battery pack, which belongs to the technical field of batteries.

Background technique

In recent years, there have been more and more severe smog in various parts of our country, and energy and environmental problems have become increasingly serious. An important factor causing smog is vehicle exhaust emissions. For this reason, the country vigorously promotes the development of electric vehicles, such as pure electric buses and new energy logistics vehicles that are currently developing rapidly. However, some problems have also been found in the application process, such as electric vehicles are prone to failures during operation, and most of these failures are caused by overheating of the battery cells or inconsistent temperature of the battery cells. Therefore, heat dissipation is very important to the safety performance of the battery pack. At present, the heat dissipation method of the battery pack is mainly air cooling. The battery pack generally includes a box body and a battery pack installed in the box body. When the air cooling method is applied to the battery pack, air inlets and air outlets are generally installed on the box body, which often leads to a low IP protection level of the battery pack. high. A low protection level will cause the battery pack to be easily affected by the external environment. For example, in rainy and snowy weather, a battery pack with a low protection level will easily enter water or other substances, which will cause safety problems.

In the prior art, in order to improve the protection level of the battery pack, a liquid cooling method is usually used in a closed box. The use and maintenance costs of the liquid cooling method are relatively high, which is not conducive to wide-scale promotion.

Utility model content

The utility model provides an air-cooled battery pack with a higher protection level.

The technical solution adopted by the utility model to solve the problems of the technologies described above is as follows:

A battery pack, comprising a box body and a battery pack arranged in the box body, the battery pack includes more than two battery modules arranged at intervals in the box along the horizontal direction, and a battery module set between two adjacent battery modules have air ducts extending in a vertical plane;

The side wall of the box body is provided with an air outlet system, the air outlet system includes an air outlet connected to the air duct, an air outlet protection channel connected to the air outlet, one end of the air outlet protection channel is connected to the air outlet, and the other One end is provided with an outlet protection channel with the opening facing downward.

The side wall of the box body provided with the air outlet is provided with the outer plate of the air outlet channel and the coaming plate of the air outlet channel. The outer plate of the air outlet channel extends in a direction parallel to the corresponding box side wall. They are respectively fixedly connected with the outer panel of the air outlet channel and the corresponding side wall of the box body. The wall surrounds the wind outlet protection channel. The air inlet protection channel is formed by the outer plate of the air outlet channel, the coaming plate of the air outlet channel, and the downwardly opening cavity surrounded by the side walls of the box body.

An air inlet system is provided on the side wall of the box, and the air inlet system includes an air inlet connected to the air duct, an air inlet protection channel connected to the air inlet, one end of the air inlet protection channel is connected to the air inlet, and the other One end is provided with an air intake protection channel with the opening facing downwards.

The side wall of the box body provided with the air inlet is provided with an outer plate of the air inlet channel and an air inlet channel coaming plate. The outer plate of the air inlet channel extends in a direction parallel to the corresponding side wall of the box body. They are respectively fixedly connected with the outer panel of the air inlet channel and the corresponding side wall of the box body. The wall surrounds the wind inlet protection channel. The air-inlet channel outer plate, the air-inlet channel coaming plate, and the cavity with the opening facing downwards formed by the side walls of the box constitute the air-outlet protection channel.

One of the air inlet and the air outlet is arranged at the upper end of one box side wall, and the other is arranged at the lower end of the opposite box side wall.

A side air duct parallel to the air duct is also provided outside the box. The side air channel is disposed between the battery module and the side wall of the box.

At least one of the air inlet and the air outlet is provided with a fan.

The air inlet system and the air outlet system are respectively arranged on two opposite side walls of the box body.

The beneficial effects of the utility model:

The battery pack of the utility model adopts an air duct between two adjacent battery modules, and an air outlet system and an air outlet protection channel are arranged on the side wall of the box body. The outlet of the air outlet protection channel of the protection channel faces downward, so that When the battery pack is used in rainy and snowy weather, it is not easy to cause water or other substances to enter the inside of the battery pack, which greatly improves the protection level of the battery pack.

Description of drawings

Fig. 1 is the structural representation of the battery pack of the present utility model;

Fig. 2 is a bottom view of the battery pack of the present invention.

detailed description

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model easier to understand, the utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

As shown in FIGS. 1-2 , the air-cooled battery pack of the present invention includes a box body 1 and a battery pack arranged in the box body. The box body 1 is in the shape of a cuboid as a whole. The box body 1 includes a bottom plate, an upper cover plate, a front side wall and a rear side wall which are sealed and fixedly connected together. The battery pack is arranged in the inner space of the box body. The battery pack may include multiple sets of battery modules, and the battery pack includes two sets of battery modules 2 in this embodiment. The two groups of battery modules 2 are arranged at intervals in the inner space of the box body 1 along the left and right directions.

The battery modules 2 are also in the shape of a cuboid as a whole, and there is a gap between the two groups of battery modules 2, and the gap forms a central air duct 11 between the battery modules. Specifically, the opposite side walls of the two sets of battery modules 2 together with the upper surface of the bottom plate of the box body and the lower surface of the upper cover plate form a central air duct. The central air duct generally extends from front to rear in a vertical plane.

An air outlet is arranged on the rear side wall of the box body 1, and the air outlet communicates with the rear end of the central air duct 11, so that the central air duct 11 communicates with the outside of the rear side wall.

The rear side wall is also provided with a rectangular air outlet channel outer plate, the air outlet channel outer plate is arranged parallel to the rear side wall, and an air outlet channel coaming plate is arranged between the air outlet channel outer plate and the outer surface of the rear side wall, that is, the air outlet The outer panel of the air channel is connected with the rear side wall through the coaming plate of the air channel. The rear end of the coaming plate of the air outlet channel is sealed and fixedly connected with the outer plate of the air outlet channel, and the front end of the coaming plate of the air outlet channel is sealed and fixedly connected with the outer surface of the rear side wall. The air outlet channel coaming plate is perpendicular to the rear side wall of the box body. Specifically, the air outlet passage coaming includes an air outlet upper apron and an air outlet side apron. The air outlet upper panel is fixedly connected between the upper end of the air outlet channel outer plate and the rear side wall, and extends along the horizontal direction. There are two air outlet side panels, which are respectively arranged between the two sides of the outer panel of the air outlet channel and the rear side wall, and both of the two air outlet side panels extend along the vertical direction. The space enclosed by the inner surface of the outer plate of the air outlet channel, the outer surface of the corresponding rear side wall of the box body and the inner surface of the coaming plate of the air outlet channel constitutes the air outlet protection channel. The lower end of the air outlet protection channel has an opening, specifically, the gap between the lower end of the outer plate of the air outlet channel and the rear side wall forms the lower end opening of the air outlet protection channel. The air outlet provided on the rear side wall is surrounded by the outer plate of the air outlet channel and the coaming plate of the air outlet channel. The air outlet is arranged at the upper position of the rear side wall of the box body. The specific position is above the center line in the height direction of the rear side wall of the casing. The air outlet is covered by the outer plate of the air outlet channel and the coaming plate of the air outlet channel. The height of the outer plate of the air outlet channel is relatively high, and the upper edge of the outer plate of the air outlet channel is above the center line of the rear side wall. Specifically, the size of the outer plate of the air outlet channel can be roughly the same as that of the rear side wall of the box body. The lower edge of the outer plate of the air outlet channel is located close to the bottom plate. Like this, the opening of the lower end of the air outlet protection channel is also in a position close to the bottom plate, so that the air in the box can only be discharged from the lower end of the air outlet protection channel. The opening at the lower end of the air outlet protection channel constitutes the outlet of the air outlet protection channel.

An air inlet is provided on the end of the bottom plate of the box away from the rear side wall, and the air inlet is an opening arranged at a corresponding position on the bottom plate. In order to ensure smooth air intake, support bodies are evenly spaced around the bottom plate, so that there is an air intake gap between the bottom plate and the plane preventing the battery pack.

An air outlet fan 4 is arranged on the air outlet to improve the efficiency of air intake or air outlet.

The battery module 2 includes two module side plates 21 arranged in parallel in the vertical direction. The two module side plates 21 are arranged side by side with one left and one right, and a battery is arranged between the two module side plates 21 . Specifically, in this embodiment, several cylindrical batteries are interposed between the two module side plates 21, and the cylindrical batteries extend along the left and right directions. The outer side of the module side plate 21 is fixedly provided with conductive bars, that is, the left side of the module left side plate and the right side of the module right side plate are both provided with conductive bars. The conductive bar connects the positive pole of the cylindrical battery to the positive pole, or the positive pole to the negative pole, or the negative pole to the negative pole according to the specific needs, so as to realize the series and parallel connection between different cylindrical batteries. On the outer sides of the conductive bars of the two module side plates, that is, on the left side of the left conductive bar and on the right side of the right conductive bar, there are thermally conductive silicone sheets 22 arranged parallel to the module side plates. The outer sides of the two heat-conducting silica gel sheets 22 are provided with heat-dissipating aluminum plates 23 . Radiation fins are arranged on the outer surface of the heat dissipation aluminum plate 23 .

The module side plate of the battery module is fixedly connected with the heat dissipation aluminum plate, and the heat conduction silica gel sheet is sandwiched in the middle. The upper and lower ends of the module side plate of the battery module are respectively welded or bolted to the upper cover plate and the bottom plate of the box. In this embodiment, they are welded so that the battery module can be fixed in the box. A windshield plate 3 is arranged on the left side of the left module and the right side of the right module. The windshield plate 3 is fixedly connected with the heat dissipation aluminum plate 23 by bolts. The wind shield plate 3 includes the wind shield outer plate arranged parallel to the heat dissipation aluminum plate 23 and the wind shield surrounding plate perpendicular to the heat dissipation aluminum plate. The windshield coaming plate comprises a horizontally extending windshield upper coaming plate and a windshield lower coaming plate fixedly connected to the upper and lower ends of the windshield plate respectively. In this way, the outer plate of the windshield, the surrounding plate of the windshield and the heat dissipation aluminum plate enclose a heat dissipation air duct, and the front and rear ends of the heat dissipation air duct are provided with openings for air circulation.

An overall positive terminal 51 and an overall negative terminal 52 are arranged at upper positions on the front side wall. After the two battery modules are connected in series and parallel to form a group, the formed total positive electrodes are electrically connected to the total positive terminals, and the formed total negative electrodes are conductively connected to the total negative terminals. The total positive terminal includes a horizontal wire sleeve perpendicular to the front side wall of the box and a vertical wire sleeve fixedly arranged on the horizontal wire sleeve. The upper end of the vertical wire sleeve is connected with the horizontal wire sleeve, and the lower end is provided with an opening for connecting parts set by electricity Connect to total positive. The structure of the total negative terminal is the same as that of the total positive terminal.

In other embodiments, the positions of the air inlets are different from those in the above embodiments. Specifically, an air inlet 12 is arranged on the front side wall of the box, and the air inlet 12 communicates with the front end of the central air duct 11, so that the central air duct communicates with the outside of the front side wall. The front side wall is also provided with a rectangular air inlet channel outer plate 61, the air inlet channel outer plate 61 is arranged parallel to the front side wall, and an air inlet channel coaming plate 62 is arranged between the air inlet channel outer plate and the outer surface of the front side wall , that is, the outer panel of the air intake channel and the front side wall are connected through the coaming plate of the air intake channel. The front end of the coaming plate of the air inlet channel is sealed and fixedly connected with the outer plate of the air inlet channel, and the rear end of the coaming plate of the air inlet channel is sealed and fixedly connected with the outer surface of the front side wall. The air inlet channel coaming plate is perpendicular to the front side wall of the box body. Specifically, the air inlet channel coaming includes an air inlet upper coaming and an air inlet side coaming. The air inlet upper wall is fixedly connected between the upper end of the air inlet channel outer plate and the front side wall, and extends along the horizontal direction. There are two air inlet side panels, which are respectively arranged between the two sides of the outer plate of the air inlet channel and the front side wall, and both of the two air inlet side panels extend along the vertical direction. The space enclosed by the inner surface of the outer plate of the air inlet channel, the outer surface of the corresponding front side wall of the box body and the inner surface of the coaming plate of the air inlet channel constitutes the air inlet protection channel. The lower end of the air inlet protection channel has an opening. Specifically, the gap between the lower end of the outer panel of the air inlet channel and the front side wall forms the lower end opening of the air inlet protection channel. The air inlet provided on the front side wall is surrounded by the outer plate of the air inlet channel and the coaming plate of the air inlet channel. The air inlet is arranged at the lower position of the front side wall of the box body. The specific position is below the center line in the height direction of the front side wall of the box body, lower than the position of the total positive terminal and the total negative terminal. The outer plate of the air inlet channel and the coaming plate of the air inlet channel cover the air inlet. The height of the outer plate of the air inlet passage is relatively low, the upper edge of the outer plate of the air inlet passage is below the center line of the front side wall, and the lower edge of the outer plate of the air inlet passage is located near the bottom plate. Like this, the opening of the lower end of the air inlet protection passage is also in a position close to the bottom plate, so that the air entering the box can only enter from the lower end of the air inlet protection passage. The lower end opening of the air inlet protection channel constitutes the air inlet protection channel opening. An air intake fan is arranged on the air inlet. In other embodiments, the air intake fan may not be provided.

In other embodiments, the air inlet protection channel and/or the air outlet protection channel are replaced by a section of flat air duct pipe, and the air duct pipe is fixedly arranged on the corresponding side wall.

In other embodiments, the windshield shroud includes a windshield upper shroud extending horizontally and a windshield side shroud extending vertically. In this way, the outer panel of the windshield, the surrounding plate of the windshield and the heat dissipation aluminum plate enclose a heat dissipation air duct, which is only provided with a downward opening, and is located at the lower end of the heat dissipation aluminum plate and the wind shield plate.

In other embodiments, both the air inlet and the air outlet are arranged on the corresponding side walls near the lower end of the bottom plate.

In the utility model, the heat-conducting silica gel sheet mainly fills the air gap between the aluminum row and the heat-dissipating aluminum plate through compression deformation, and plays an insulating role. The thermal conductivity of air is 0.023W/m. k, and the thermal conductivity of thermal silica gel is 3W/m. k, the thermal conductivity of the heat dissipation aluminum plate is 237W/m. k. The heat is conducted to the heat-dissipating aluminum plate through the heat-conducting silica gel sheet, and multiple heat-dissipating fins are set on the heat-dissipating aluminum plate, which greatly increases the heat dissipation area and reduces the temperature difference.

The heat emitted by the conductive row at both ends of each cell is carried out by the wind that is conducted from the heat-conducting silicone sheet to the heat-dissipating aluminum plate through the air duct, and the wind flows through the air duct to take away the heat.

The heat of the battery cell is conducted from the conductive aluminum row to the heat-dissipating aluminum plate through the heat-conducting silica gel sheet, and the heat is mainly dissipated by the heat-dissipating aluminum plate, not the battery itself. Therefore, the wind only needs to flow through the cooling plate without blowing to the battery core, which avoids the problem of low IP protection level.

Claims (6)

1. A battery pack, comprising a box body (1) and a battery pack (2) arranged in the box body (1), characterized in that the battery pack (2) includes a battery pack (2) arranged at intervals along the horizontal direction in the box body For more than two battery modules in (1), an air duct extending in a vertical plane is arranged between two adjacent battery modules; The side wall of the box body is provided with an air outlet system, the air outlet system includes an air outlet connected to the air duct, an air outlet protection channel connected to the air outlet, one end of the air outlet protection channel is connected to the air outlet, and the other One end is provided with an outlet protection channel with the opening facing downward. 2. The battery pack according to claim 1, characterized in that, the side wall of the box body (1) provided with the air outlet is provided with an outer plate of the air outlet channel and a coaming plate of the air outlet channel, and the outer plate of the air outlet channel is along the The corresponding box side walls extend in parallel directions, and the two ends of the air outlet channel coaming are respectively fixedly connected with the outer panel of the air outlet channel and the corresponding box (1) side wall, and the air outlet channel coaming includes the upper air outlet coaming And the air outlet side panel, the air outlet channel outer plate, the air outlet channel coaming plate and the side wall of the casing (1) have surrounded the described air outlet protection channel. 3. The battery pack according to claim 1 or 2, characterized in that, the side wall of the box (1) is provided with an air intake system, and the air intake system includes an air inlet connected to the air duct, and an air intake connected to the air duct. An air inlet protection channel connected to the air inlet, one end of the air inlet protection channel is connected to the air inlet, and the other end is provided with an air inlet protection channel opening facing downward. 4. The battery pack according to claim 3, wherein the side wall of the box body provided with the air inlet is provided with an outer plate of the air inlet channel and a coaming plate of the air inlet channel, and the outer plate of the air inlet channel is along the edge of the corresponding box. The side walls of the body extend in parallel directions, and the two ends of the air inlet channel coaming are fixedly connected with the outer panel of the air inlet channel and the corresponding side wall of the box respectively. , the outer plate of the air inlet channel, the coaming plate of the air inlet channel, and the side wall of the box body form the air inlet protection channel. 5 . The battery pack according to claim 3 , wherein one of the air inlet and the air outlet is arranged at the upper end of one side wall of the box body, and the other is arranged at the lower end of the opposite side wall of the box body. 6. The battery pack according to claim 3, wherein at least one of the air inlet and the air outlet is provided with a fan.