阅读说明：本技术 一种用于动力电池包散热的风冷系统 (Air cooling system for heat dissipation of power battery pack ) 是由 张兰春 陈茜 王天波 于 2020-05-09 设计创作，主要内容包括：本发明涉及动力电池的风冷技术设计,具体为一种用于动力电池包散热的风冷系统,在优化电池包散热结构的同时,降低空气温度,通过电控装置,实现针对性电池模组高效降温,以实现电池包工作效率,安全性及温度均衡性的提高,包括电池模组(2),所述电池模组(2)外部设有电池包壳体(1),所述电池包壳体(1)的上部设有电池包出风口(7),所述电池包出风口(7)可通过电池包壳体(1)与电池模组(2)连通,所述电池包壳体(1)的底部设有电池包进风口(6),所述电池包进风口(6)也与电池包壳体(1)连通,所述电池包壳体(1)的两侧设有半导体制冷装置(3)。(The invention relates to the air cooling technical design of a power battery, in particular to an air cooling system for heat dissipation of a power battery pack, the air temperature is reduced while the heat dissipation structure of the battery pack is optimized, the targeted battery module is efficiently cooled through the electric control device, so as to improve the working efficiency, safety and temperature balance of the battery pack, comprising a battery module (2), a battery pack shell (1) is arranged outside the battery module (2), a battery pack air outlet (7) is arranged at the upper part of the battery pack shell (1), the air outlet (7) of the battery pack can be communicated with the battery module (2) through the battery pack shell (1), the bottom of the battery pack shell (1) is provided with a battery pack air inlet (6), the battery pack air inlet (6) is also communicated with the battery pack shell (1), and semiconductor refrigerating devices (3) are arranged on two sides of the battery pack shell (1).)

1. The utility model provides a be used for radiating forced air cooling system of power battery package which characterized in that: the battery pack cooling device comprises a battery module (2), a battery pack shell (1) is arranged outside the battery module (2), a battery pack air outlet (7) is arranged at the upper part of the battery pack shell (1), the battery pack air outlet (7) can be communicated with the battery module (2) through the battery pack shell (1), a battery pack air inlet (6) is arranged at the bottom of the battery pack shell (1), the battery pack air inlet (6) is also communicated with the battery pack shell (1), semiconductor cooling devices (3) are arranged on two sides of the battery pack shell (1), each semiconductor cooling device (3) comprises a first electric cooling fan (4) and a second electric cooling fan (5), the first electric cooling fan (4) is arranged on the side wall of the battery pack shell (1) and is communicated with the battery module (2), the second electric cooling fan (5) is also arranged on the side wall of the battery pack shell (1) and is communicated with the battery module (2), the second electric cooling fan (5) is located below the first electric cooling fan (4), a temperature sensor (13) is further arranged on the inner wall of the battery module (2), a controller (14) is arranged on the inner wall of the top of the battery pack shell (1), and the controller (14) is electrically connected with the temperature sensor (13), the first electric cooling fan (4) and the second electric cooling fan (5) respectively.

2. The air cooling system for dissipating heat of a power battery pack according to claim 1, wherein: the battery pack is characterized by further comprising an air inlet movable baffle (10), wherein the air inlet movable baffle (10) is arranged on the battery pack shell (1) and is positioned between the second electric cooling fan (5) and the battery module (2).

3. The air cooling system for dissipating heat of a power battery pack according to claim 1, wherein: and a first dustproof screen (11) is arranged in the air inlet (6) of the battery pack.

4. The air cooling system for dissipating heat of a power battery pack according to claim 1, wherein: the battery pack air outlet is characterized by further comprising a battery module air outlet (8), wherein the battery module air outlet (8) is arranged above the battery module (2) and is communicated with the battery pack shell air outlet (7).

5. The air cooling system for dissipating heat of a power battery pack according to claim 1, wherein: the battery pack is characterized by further comprising a second dustproof screen (12), wherein the second dustproof screen (12) is arranged at the air outlet (7) of the battery pack.

6. The air cooling system for dissipating heat of a power battery pack according to claim 1, wherein: the battery pack is characterized in that a first fixing baffle (9) is arranged on the battery pack shell (1), and the first fixing baffle (9) is arranged between the first electric cooling fan (4) and the second electric cooling fan (5).

7. The air cooling system for dissipating heat of a power battery pack according to claim 1, wherein: and a second fixing baffle (15) is arranged on the battery pack shell (1), and the second fixing baffle (15) is respectively connected with the battery pack air inlet (6) and the first fixing baffle (9).

8. The air cooling system for dissipating heat of a power battery pack according to claim 4, wherein: the battery module (2) comprises a plurality of single batteries (16), and air flow channels are formed in gaps between every two adjacent single batteries (16).

9. The air-cooling system for dissipating heat of a power battery pack according to claim 8, wherein: and the battery pack air outlet (7), the battery pack air inlet (6) and the battery module air outlet (8) are vertical to the air flow channel.

Technical Field

The invention relates to an air cooling technical design of a power battery, in particular to an air cooling system for heat dissipation of a power battery pack.

Background

In recent years, the problems of environmental pollution and resource shortage are becoming more serious, and electric automobiles are highly emphasized due to the remarkable advantages of low energy consumption, low noise pollution and the like. As a power source, the voltage and the capacity of the lithium ion single batteries are relatively small, the battery pack is formed by connecting the single batteries in series and in parallel, the single batteries are tightly arranged in the battery pack, and heat generated in the using process is difficult to discharge. Generally, the working temperature of the lithium battery is kept between 25 and 40 ℃, and the maximum temperature difference of the single battery is not more than 5 ℃. Therefore, the air-cooled heat dissipation system of the power battery pack is optimized, and the air-cooled heat dissipation system plays an extremely important role in solving the problems of battery performance attenuation, short service life and the like caused by battery overheating. At present, forced air cooling heat dissipation is mainly adopted, and is greatly influenced by the ambient temperature; and the battery pack adopts a consistent battery heat dissipation system, which is not beneficial to improving the temperature balance of the battery pack.

Disclosure of Invention

The invention aims to overcome the technical problems in the prior art, and provides an air cooling system for heat dissipation of a power battery pack, which reduces the air temperature while optimizing the heat dissipation structure of the battery pack, and realizes efficient cooling of a targeted battery module through an electric control device so as to improve the working efficiency, safety and temperature balance of the battery pack.

In order to solve the technical problems, the invention provides the following technical scheme: a battery pack shell is arranged outside the battery module, a battery pack air outlet is formed in the upper portion of the battery pack shell and can be communicated with the battery module through the battery pack shell, a battery pack air inlet is formed in the bottom of the battery pack shell and is also communicated with the battery pack shell, semiconductor refrigerating devices are arranged on two sides of the battery pack shell and comprise an electric cooling fan I and an electric cooling fan II, the electric cooling fan I is arranged on the side wall of the battery pack shell and is communicated with the battery module, the electric cooling fan II is also arranged on the side wall of the battery pack shell and is communicated with the battery module, the electric cooling fan II is located below the electric cooling fan I, and a temperature sensor is further arranged on the inner wall of the battery module, the controller is arranged on the inner wall of the top of the battery pack shell and is electrically connected with the temperature sensor, the first electric cooling fan and the second electric cooling fan respectively.

Preferably, the battery pack further comprises an air inlet movable baffle, and the air inlet movable baffle is arranged on the battery pack shell and is positioned between the second electric cooling fan and the battery module.

Preferably, a first dustproof screen plate is arranged in the air inlet of the battery pack.

Preferably, the air outlet of the battery module is arranged above the battery module and communicated with the air outlet of the battery shell.

Preferably, the battery pack further comprises a second dustproof screen plate, and the second dustproof screen plate is arranged at an air outlet of the battery pack.

Preferably, a first fixing baffle is arranged on the battery shell, and the first fixing baffle is arranged between the first electric cooling fan and the second electric cooling fan.

Preferably, a second fixing baffle is arranged on the battery pack shell and is respectively connected with the battery pack air inlet and the first fixing baffle.

Preferably, the battery module comprises a plurality of single batteries, and an air flow channel is formed by a gap between adjacent single batteries.

Preferably, the air outlet of the battery pack, the air inlet of the battery pack and the air outlet of the battery module are perpendicular to the air flow channel.

The invention has the beneficial effects that: compared with the structure that the inlet and the outlet are positioned on different sides and are parallel to the air flow channel, the air cooling system for heat dissipation of the power battery pack reduces the highest temperature of the battery pack and reduces the temperature difference among the single batteries; the battery module adopts the non-equidistant symmetrical distribution of battery cell, further reduces the battery cell difference in temperature for under room temperature environment, forced air cooling radiating effect obtains improving.

The semiconductor refrigeration device is divided into an upper part and a lower part, the upper part dissipates heat to the battery pack, the air temperature is effectively reduced by the semiconductor refrigeration device, and the heat dissipation efficiency is improved; the latter half dispels the heat to battery module, moves through battery module air intake adjustable fender position, can dispel the heat alone to the battery module that the temperature is too high, effectively reduces the temperature imbalance in the battery package working process.

When the temperature of the battery pack is too high or the battery pack is internally short-circuited, the semiconductor refrigerating device is started, the upper half part dissipates heat of the internal space of the battery pack, the movable baffle of the air inlet of the battery module at the lower half part is completely opened, and the heat dissipation of the battery module is performed through the semiconductor refrigerating device. The temperature of the battery is reduced, and the personal safety in a burst state is ensured.

Drawings

FIG. 1 is a side cross-sectional view of the present invention;

fig. 2 is a side view of an arrangement of battery modules according to the present invention;

FIG. 3 is a side view of the semiconductor refrigeration unit of the present invention;

FIG. 4 is a front view of the semiconductor refrigeration unit of the present invention;

fig. 5 is a side view of the heat dissipation structure of the battery module according to the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

An air cooling system for heat dissipation of a power battery pack comprises a battery module 2, a battery pack shell 1 is arranged outside the battery module 2, a battery pack air outlet 7 is arranged at the upper part of the battery pack shell 1, the battery pack air outlet 7 can be communicated with the battery module 2 through the battery pack shell 1, a battery pack air inlet 6 is arranged at the bottom of the battery pack shell 1, the battery pack air inlet 6 is also communicated with the battery pack shell 1, semiconductor refrigerating devices 3 are arranged at two sides of the battery pack shell 1, each semiconductor refrigerating device 3 comprises a first electric cooling fan 4 and a second electric cooling fan 5, the first electric cooling fan 4 is arranged on the side wall of the battery pack shell 1 and is communicated with the battery module 2, the second electric cooling fan 5 is also arranged on the side wall of the battery pack shell 1 and is communicated with the battery module 2, and the second electric cooling fan 5 is positioned below the first electric cooling fan 4, still be equipped with temperature sensor 13 on the inner wall of battery module 1, be equipped with controller 14 on the top inner wall of battery package casing 1, controller 14 is connected with temperature sensor 13, electronic radiator fan 4 and electronic radiator fan two 5 electricity respectively.

The battery pack comprises a battery pack shell 1, an electric cooling fan II 5 and a battery module 2, and is characterized by further comprising an air inlet movable baffle 10, wherein the air inlet movable baffle 10 is arranged on the battery pack shell 1 and is positioned between the electric cooling fan II 5 and the battery module 2; a first dustproof screen plate 11 is arranged in the air inlet 6 of the battery pack; the air outlet 8 of the battery module is arranged above the battery module 2 and communicated with the air outlet 8 of the battery module; the second dustproof screen plate 12 is arranged at the air outlet 7 of the battery pack; the battery pack shell 1 is provided with a first fixed baffle 9, and the first fixed baffle 9 is arranged on a first electric cooling fan 4 and a second electric cooling fan 5; a second fixed baffle 15 is arranged on the battery pack shell 1, and the second fixed baffle 15 is respectively connected with the battery pack air inlet 6 and the first fixed baffle 9; the battery module 2 comprises a plurality of single batteries 16, and air flow channels are formed in gaps between every two adjacent single batteries 16; and the battery pack air outlet 7, the battery pack air inlet 6 and the battery module air outlet 8 are vertical to the air flow channel.