阅读说明：本技术 一种动力电池散热装置 (Power battery heat abstractor ) 是由 袁孝友 肖梦 朱颖志 于 2019-09-19 设计创作，主要内容包括：本发明公开了一种动力电池散热装置,包括箱体、通风装置,箱体包括上端面为敞开式的放置箱和封盖,封盖是可拆卸的安装在放置箱上端面,封盖的中心位置设置有与外界冷空气源连通的进气端,封盖上还设置有出气端,通风装置包括进气部件、通气部件和步进风机,进气部件是位于放置箱的底部,通气部件是位于放置箱的两侧,通气部件两端均连接有进气部件,通气部件与进气部件连通形成供气体流通的通道,通气部件另一端安装有步进风机,本发明结构简单,能够很好对动力电池进行冷却。(The invention discloses a power battery heat dissipation device, which comprises a box body and a ventilation device, wherein the box body comprises a placing box and a sealing cover, the upper end surface of the placing box is open, the sealing cover is detachably arranged on the upper end surface of the placing box, the center of the sealing cover is provided with an air inlet end communicated with an external cold air source, the sealing cover is also provided with an air outlet end, the ventilation device comprises an air inlet part, a ventilation part and a stepping fan, the air inlet part is positioned at the bottom of the placing box, the ventilation part is positioned at two sides of the placing box, two ends of the ventilation part are both connected with the air inlet part, the ventilation part is communicated with the air inlet part to form a channel for air circulation, and the other end of the ventilation part is provided with the stepping fan.)

1. A power battery heat abstractor, characterized in that: the power distribution box comprises a box body, ventilation unit, the box includes that the up end is the open-type case and closing cap of placing, the closing cap is that detachable installs places the case up end, the central point of closing cap puts the inlet end that is provided with and communicates with external cold air source, still be provided with the end of giving vent to anger on the closing cap, ventilation unit includes air inlet component, ventilation unit and step fan, air inlet component is the bottom that is located the case of placing, ventilation unit is the both sides that are located the case of placing, the ventilation unit both ends all are connected with air inlet component, ventilation unit and air inlet component intercommunication form the passageway that supplies the gas circulation, step fan is installed to the ventilation unit other.

2. The power battery heat sink of claim 1, wherein: the air inlet component is a through groove in the bottom of the placing box, the through groove is communicated with the placing box, and the air inlet component is a channel in two side faces of the placing box.

3. The power battery heat sink of claim 1, wherein: the control unit is electrically connected with the stepping fan and controls the stepping fan to rotate forwards and backwards.

4. The power battery heat sink of claim 1, wherein: the edge of the top of the placing box is provided with a convex block, the bottom of the sealing cover is provided with a groove, and the groove is matched with the convex block.

5. The power battery heat sink of claim 4, wherein: the end of giving vent to anger includes venthole and sealing device, the venthole runs through in the recess both sides, and the venthole height in the outside is higher than inboard venthole, be provided with the installation cavity on the lug, the installation cavity is put through with the venthole of both sides, slidable mounting has the slider in the installation cavity, and the slider is sealed with the installation cavity, the top of slider still is provided with the through-hole, gas discharge, be provided with the cylinder with the through-hole same diameter in the installation cavity, the venthole that is close to the outside still is provided with the spring, the spring is located the installation cavity, promote the venthole to the inboard with the slider, and make the cylinder peg graft into the through-hole, it is sealed with the through.

Technical Field

The invention belongs to the technical field of power batteries, and particularly relates to a power battery heat dissipation device.

Background

As electric vehicles are gradually brought to market applications, thermal safety issues of power batteries in electric vehicles are gradually emerging. In an electric vehicle, a power battery is often charged and discharged with a large current, and a large amount of heat including joule heat, reaction heat, polarization heat, and the like is generated in the process. The space is narrow and small on the car, and a large amount of battery cells are closely arranged together in the group battery usually, and the heat of gathering is difficult to discharge, and the temperature of battery probably surpasss normal scope when long-time work, simultaneously because the difference of spatial position, there is the difference in the temperature of each battery cell yet. The excessive temperature of the battery pack can reduce the charging and discharging efficiency of the battery, affect the safety and reliability of the battery pack and cause thermal failure in severe cases, so that the thermal management of the power battery of the electric automobile is necessary. The air-cooled heat dissipation system has the advantages of simple structure, light weight, low cost, capability of meeting the heat dissipation requirement of the battery pack and the like, and is widely applied to the battery heat dissipation system. The existing air-cooled heat dissipation device is generally in a one-way serial or parallel ventilation mode, the phenomenon of overhigh local temperature or uneven temperature distribution of the battery pack is easily caused, and the heat dissipation effect of the battery pack cannot be guaranteed. Therefore, it is necessary to develop a novel air-cooled heat dissipation device with simple structure and convenient operation, and ensuring good heat dissipation effect of the battery pack.

Chinese patent CN201610089162.6 discloses a power battery circulation air-cooled heat abstractor that flows, establishes battery box, marching type fan, temperature sensor, the controlling means of backup pad in including, one side of battery box from top to bottom sets gradually top air outlet, air intake, the bottom air outlet through marching type fan to battery box input air, all be provided with automatically controlled valve on top air outlet, bottom air outlet and the inlet air duct of battery box, controlling means and temperature sensor and each valve circuit connection for the switching of each valve of each part temperature difference value control of power battery according to temperature sensor collection, with the flow path of switching air in the battery box. The invention controls the opening and closing of each valve by using the temperature information of the battery pack obtained by the temperature sensor, realizes the circulation switching of the cooling air direction of the battery pack, ensures the highest temperature and the temperature difference of the battery pack to be within the normal range, and realizes the good temperature consistency of the battery pack. However, when the temperature sensor is used for detecting the temperature of the battery pack, data hysteresis exists, and when the temperature of the battery pack is detected to be too high, the efficiency of the battery pack is obviously reduced due to the too high temperature of the battery pack. The temperature sensor is used for detecting the temperature of the battery pack and then the stepping fan is used for cooling, the process is complex, errors are easy to occur, and the structure is complex.

In order to carry out more effective cooling measure to the group battery, sometimes can set up refrigeration plant, the refrigeration plant case injects cold air in order to cool down to the group battery, but the cooling is too much again can produce the influence to group battery life-span and group battery service condition, and it is very important to guarantee the temperature balance of whole group battery again when cooling.

Disclosure of Invention

The invention aims to provide a power battery heat dissipation device, which forms an airflow circulating heat exchange process in a box body assembled with a power battery, so that the problem that the temperature of a part of the power battery directly contacted with cold air is too low and other parts cannot be fully cooled due to direct blowing of the cold air is avoided, the temperature in the box body is more uniform due to circulating airflow, and a specially designed sealing device not only exhausts the gas in the box body, but also can play a good sealing role.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a power battery heat abstractor, the power battery power heat abstractor comprises a box body, ventilation unit, the box includes that the up end is the open-type case and the closing cap of placing, the closing cap is that detachable installs places the case up end, the central point of closing cap puts the inlet end that is provided with and communicates with external cold air source, still be provided with the end of giving vent to anger on the closing cap, ventilation unit includes air inlet component, ventilation unit and step fan, air inlet component is the bottom that is located the case, ventilation unit is the both sides that are located the case of placing, ventilation unit both ends all are connected with air inlet component, ventilation unit and air inlet component intercommunication form the passageway that supplies the gas circulation, step fan is installed to.

Preferably, the air inlet component is a through groove in the bottom of the placing box, the through groove is communicated with the placing box, and the ventilating component is a channel in two side faces of the placing box.

Preferably, the stepping fan is further provided with a control unit, and the control unit is electrically connected with the stepping fan and controls the stepping fan to rotate forwards and backwards.

Furthermore, a convex block is arranged on the edge of the top of the placing box, a groove is arranged at the bottom of the sealing cover, and the groove is matched with the convex block.

Further, the end of giving vent to anger includes venthole and sealing device, the venthole runs through in the recess both sides, and the venthole height in the outside is higher than inboard venthole, be provided with the installation cavity on the lug, the installation cavity is put through with the venthole of both sides, slidable mounting has the slider in the installation cavity, and the slider is sealed with the installation cavity, the top of slider still is provided with the through-hole, discharge for the gas, be provided with the cylinder with the through-hole same diameter in the installation cavity, the venthole that is close to the outside still is provided with the spring, the spring is located the installation cavity, the venthole promotion to the inboard with the slider, and make the cylinder peg graft into the through-hole, it is sealed with the through.

The invention has the beneficial effects that:

1. utilize ventilation unit to form a circulating gas flow process in the box, the partly cold air that is located the box top can be attracted and enter into the bottom half, cool down power battery bottom, the cold air that is located the box top simultaneously cools down power battery's top, because cold air transportation process can flow in the box side, that is to say also can be cooled down at the air that is located the box side, realized that the air in the box homoenergetic realizes simultaneously cooling down under the cold air flows, make the air temperature in the box more even, power battery cooling effect is better, work efficiency is higher.

2. The sealing device who designs can open when the air pressure in the box is too big, and it is too big to place the atmospheric pressure in the box, and when other materials such as water appear in the external world and exert pressure to the end of giving vent to anger, sealing device can prevent that other materials such as this water from getting into.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

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

fig. 2 is a schematic view of a first flow path of the ventilation device of the present invention.

Fig. 3 is a schematic view of a ventilation device for a second flow path of the present invention.

Fig. 4 is a cross-sectional view of the sealing device of the present invention.

Wherein: the device comprises a box body-1, a placing box-2, a sealing cover-3, a bump-4, a groove-5, an air outlet end-6, an air inlet part-7, an air vent part-8, a stepping fan-9, an air outlet hole-10, a mounting cavity-11, a sliding block-12, a through hole-13, a cylinder-14, a spring-15 and an air inlet end-16.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Referring to the attached drawing 1, the power battery heat dissipation device comprises a box body 1 and a ventilation device, wherein the box body 1 comprises a placing box 2 with an open upper end surface and a sealing cover 3, the sealing cover 3 is detachably arranged on the upper end surface of the placing box 2, a convex block 4 is arranged on the edge of the top of the placing box 1 for improving the sealing effect of the box body 1, a groove 5 is arranged at the bottom of the sealing cover 3, the groove 5 is matched with the convex block 4, the sealing effect between the sealing cover 3 and the placing box 2 is excellent due to the clamping type assembly, external water cannot pass through the contact surface of the sealing cover 3 and the placing box 2, the sealing cover 3 is connected with the placing box 2 through bolts, an air inlet end 16 communicated with an external cold air source is arranged at the center of the sealing cover 3, an air outlet end 6 is further arranged on the sealing cover 3, the ventilation device comprises an air inlet part 7, a ventilation part 8 and a stepping fan 9, the air inlet part 7 is a through groove arranged in, the through groove is put through with placing case 2 mutually, and ventilation unit 8 specifically is for being located the passageway of placing 2 both sides faces of case, and ventilation unit 8 both ends all are connected with air intake unit 7, and ventilation unit 8 and air intake unit 7 intercommunication form the passageway of air feed circulation, and step fan 9 is installed to the ventilation unit 8 other end, still is provided with the control unit, and the control unit and step fan 9 electric connection control step fan 9 corotation and reversal.

Supposing that the stepping fan 9 absorbs heat air in the forward rotation process, please refer to fig. 2, the air entering at the air inlet end 5 can be sucked into the ventilation part 8 by the stepping fan 9 and then discharged by the air inlet part 7, so that the cold air can be absorbed into the bottom of the placing box 2 to cool the bottom of the power battery, meanwhile, the hot air at the bottom of the placing box 2 can be pushed upwards, when the air pressure in the placing box 2 is too high, the air can be discharged at the air outlet end 6, so that a first flow path is formed, the cold air is utilized to cool the power battery in the first flow path, the cooling effect is obvious, the uniformity is higher, and the surface temperature of the power battery is effectively reduced.

Referring to fig. 3, when the stepping fan 9 rotates reversely, air is discharged, the stepping fan 9 forms a negative pressure when rotating, so that the air inlet part 7 at the bottom of the storage box 2 sucks in hot air at the bottom of the storage box 2, the hot air passes through the air vent part 8 and is discharged from the air outlet end 6 at the top of the storage box 2.

Referring to fig. 4, the air outlet end 6 includes an air outlet hole 10 and a sealing device, the air outlet hole 10 penetrates through two sides of the groove 5, the height of the air outlet hole 10 on the outer side is higher than that of the air outlet hole 10 on the inner side, the bump 4 is provided with a mounting cavity 11, the mounting cavity 11 is communicated with the air outlet holes 10 on the two sides, a slider 12 is slidably mounted in the mounting cavity 11, the slider 12 seals the mounting cavity, the top of the slider 12 is further provided with a through hole 13 for discharging air, a cylinder 14 having the same diameter as the through hole 13 is arranged in the mounting cavity 11, a spring 15 is arranged in the air outlet hole 10 near the outer side, the spring 15 is positioned in the mounting cavity to push the air outlet hole 10 on the inner side of the slider 12, and the cylinder 14 is inserted into the through hole 13 to seal the through hole 13, obviously, the through hole 13 is the only part capable of passing air on the slider 12, when the air pressure in the placing box, make cylinder 14 block up through-hole 13, the material such as external water of course enters into and places the case 2 in, when placing the sufficient height of atmospheric pressure in case 2, can promote slider 12 and move to the outside, through-hole 13 breaks away from cylinder 14, place the gas in the case 2 and can discharge, try to enter into through this through-hole 13 when material such as external water and place the case 2 in, will exert pressure to slider 12, make cylinder 14 enter into in the through-hole 13, prevent that water from entering into and placing case 2 in, also can blow the water in the through-hole 13 completely through outside exhaust air, also play a role to sealed.

The working principle is as follows:

power battery's temperature and outside air's temperature all can real-time supervision, and the control unit cools down power according to specific temperature, for example, when power battery temperature below 30 ℃, can select step fan 9 reversal, and the hot-air of placing 2 bottoms of case is discharged, need not use the cold air to cool down, also can let in the cold air certainly for the cooling. When the temperature of the power battery reaches above 30 ℃, cold air is introduced and the stepping fan 9 rotates forwards to cool the power battery, so that the cooling effect is good.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.