CN115663351A - New energy automobile power battery cooling device - Google Patents
New energy automobile power battery cooling device Download PDFInfo
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- CN115663351A CN115663351A CN202211688054.2A CN202211688054A CN115663351A CN 115663351 A CN115663351 A CN 115663351A CN 202211688054 A CN202211688054 A CN 202211688054A CN 115663351 A CN115663351 A CN 115663351A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a new energy automobile power battery cooling device, and relates to the technical field of new energy automobile power batteries. A new energy automobile power battery cooling device comprises an evaporation chamber, a condensation chamber and a liquid collecting tank, wherein the evaporation chamber is used for absorbing heat of a battery and evaporating a refrigerant at the same time, the condensation chamber is used for absorbing heat of the refrigerant and condensing the refrigerant, the liquid collecting tank is used for collecting the liquid refrigerant, a first interlayer is arranged between the evaporation chamber and the condensation chamber, and a plurality of air holes for the gaseous refrigerant to pass through are formed in the first interlayer; a second interlayer is arranged between the condensing chamber and the liquid collecting tank, and a check valve for liquid refrigerant to pass through is arranged on the second interlayer; and a third interlayer is arranged between the liquid collecting tank and the evaporation chamber, and a control valve for liquid refrigerant to pass through is arranged on the third interlayer. And by adopting a semi-immersed design, the cooling effect is good, and the influence on the stability of the power battery and the vehicle caused by liquid impact is reduced.
Description
Technical Field
The invention relates to the technical field of new energy automobile power batteries, in particular to a cooling device for a new energy automobile power battery.
Background
New energy automobiles will become the main vehicle in the future. For new energy automobiles, the service life and safety of the power battery are important directions of current research, and therefore the thermal management technology of the power battery becomes a focus of attention.
The cooling mode of the high-power battery pack mainly takes water circulation cooling as a main mode, and the water cooling has the main defects that: the water cooling system has large volume, needs a large amount of water cooling zones arranged in the gaps of the power battery, has a complex structure, and has general heat exchange and cooling efficiency due to indirect contact.
Therefore, the prior art also proposes the use of immersion cooling devices for new energy vehicles. Immersion cooling is a relatively novel cooling method and is often used for cooling electronic components such as memory processors. Unlike new energy vehicles, in which electronic components are placed in a stationary state, new energy vehicles often involve acceleration starting and deceleration braking of the vehicle, and if a power battery is immersed in a cooling liquid for a long time, fluctuation of the cooling liquid may have a certain influence on the stability of the power battery and the vehicle.
Disclosure of Invention
The invention aims to: aiming at the problems, the cooling device for the power battery of the new energy automobile is provided, adopts a semi-immersed design, has good cooling effect, and reduces the influence on the stability of the power battery and the vehicle caused by liquid impact.
The technical scheme adopted by the invention is as follows:
a cooling device for a power battery of a new energy automobile comprises an evaporation chamber, a condensation chamber and a liquid collecting box, wherein the evaporation chamber is used for absorbing heat of the power battery and evaporating a refrigerant at the same time, the condensation chamber is used for absorbing heat of the refrigerant and condensing the refrigerant, the liquid collecting box is used for collecting the liquid refrigerant, a first interlayer is arranged between the evaporation chamber and the condensation chamber, and a plurality of air holes for the gas refrigerant to pass through are formed in the first interlayer; a second interlayer is arranged between the condensing chamber and the liquid collecting tank, and a one-way valve for liquid refrigerant to pass through is arranged on the second interlayer; and a third interlayer is arranged between the liquid collecting tank and the evaporation chamber, and a control valve for liquid refrigerant to pass through is arranged on the third interlayer.
Optionally, the first partition is an arched partition.
Optionally, the liquid collecting tank is arranged on the side surface of the evaporation chamber.
Optionally, the header tank is arranged on the left side and the right side of the evaporation chamber.
Optionally, the second interlayer is arc-shaped with the middle part downward, and the check valve is arranged at the bottom of the second interlayer.
Optionally, a water pump is further arranged between the liquid collecting tank and the evaporation chamber, the input end of the water pump is arranged at the inner bottom of the evaporation chamber, and the output end of the water pump is arranged in the liquid collecting tank.
Optionally, a branch is further arranged between the liquid collecting tank and the evaporation chamber, one end of the branch is arranged at the input end of the one-way valve, and the other end of the branch is arranged at the input end of the water pump.
Optionally, a plurality of circular wave-proof buffering pits are arranged in the evaporation chamber.
Optionally, the front end and the rear end of the evaporation chamber are provided with swash plates arranged along the left-right direction, and the swash plates are provided with corrugations arranged along the left-right direction in the axial direction.
Optionally, the control valve is an electromagnetic valve, and the control valve is connected with a temperature sensor.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the cooling device for the power battery of the new energy automobile, disclosed by the invention, when the temperature of the power battery is too high, the cooling medium is immersed for cooling, so that the cooling medium completes self circulation in the cooling device, and the cooling effect is good; after the temperature of the power battery is reduced, the liquid refrigerant is separated from the power battery, and the liquid refrigerant is collected, so that fluctuation is reduced, and liquid is prevented from impacting the power battery;
2. according to the new energy automobile power battery cooling device disclosed by the invention, the impact resistant structures are arranged in the evaporation chamber and the liquid collecting box, so that the impact of liquid refrigerants in the evaporation chamber and the liquid collecting box on the cooling device and a power battery due to fluctuation in the cooling process can be prevented;
3. according to the cooling device for the power battery of the new energy automobile, the condensation chamber can be connected with an external refrigeration system, so that the power battery is cooled by utilizing the refrigeration system of the existing vehicle, and the effects of saving energy and saving cost are achieved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is an external structural view of the present invention.
Fig. 2 isbase:Sub>A sectional view taken atbase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a sectional view at B-B of fig. 2.
Fig. 4 is a sectional view at C-C of fig. 2.
Fig. 5 is a sectional view at D-D of fig. 2.
The mark in the figure is: 1-evaporation chamber, 101-circular wave-proof buffer pit, 2-condensation chamber, 3-liquid collecting tank, 4-first interlayer, 401-air vent, 5-second interlayer, 6-one-way valve, 7-third interlayer, 8-control valve, 9-water pump, 10-branch, 11-wave-proof plate, 12-temperature sensor, 13-water pipe, 14-heat exchanger, 15-power battery.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
A new energy automobile power battery cooling device is shown in figures 1-5 and comprises an evaporation chamber 1 used for absorbing heat of a power battery 15 and evaporating a refrigerant, a condensation chamber 2 used for absorbing heat of the refrigerant and condensing the refrigerant and a liquid collecting tank 3 used for collecting liquid refrigerant, wherein a first interlayer 4 is arranged between the evaporation chamber 1 and the condensation chamber 2, and a plurality of air holes 401 for gaseous refrigerant to pass through are formed in the first interlayer 4; a second interlayer 5 is arranged between the condensing chamber 2 and the liquid collecting tank 3, and a check valve 6 for liquid refrigerant to pass through is arranged on the second interlayer 5; and a third interlayer 7 is arranged between the liquid collecting tank 3 and the evaporation chamber 1, and a control valve 8 for liquid refrigerant to pass through is arranged on the third interlayer 7.
The refrigerant is a substance that easily absorbs heat to become gas and easily releases heat to become liquid. At a certain temperature, that is, the temperature at which the power battery 15 needs to be cooled, the liquid refrigerant can absorb heat and undergo phase change, thereby cooling the power battery 15. Specifically, a power battery 15 is arranged in the evaporation chamber 1, and when the temperature needs to be reduced, the liquid refrigerant absorbs the heat of the power battery 15 in the evaporation chamber 1, so that the liquid refrigerant is evaporated. In the present embodiment, the specific refrigerant is selected according to the boiling point of the refrigerant.
The condensing chamber 2 can condense the gaseous refrigerant into a liquid state, and further, a heat exchanger 14 is arranged in the condensing chamber 2, the heat exchanger 14 can be connected with an external refrigerating system, and then a power battery 15 can be cooled by utilizing the existing refrigerating system of the vehicle, and the effects of saving energy and saving cost are achieved if the existing air conditioning system of the vehicle is adopted. As another specific embodiment, the shells of the liquid collecting tank 3 and the condensing chamber 2 are made of metal, so that heat exchange with the external environment can be better performed, when the temperature of the power battery 15 does not rise to the temperature that needs immersion cooling, that is, only light cooling is needed, the heat exchanger 14 can be used to dissipate heat of the gas in the evaporating chamber 1 and the condensing chamber 2, and the liquid in the liquid collecting tank 3 can be used to perform indirect liquid cooling heat dissipation on the evaporating chamber 1.
The header tank 3 can be used as a storage place for a liquid refrigerant, and when the power battery 15 does not need to be cooled, the liquid refrigerant is stored in the header tank 3, so that impact on the power battery 15 is prevented. Preferably, the volume of the header tank 3 is equal to the total volume of the liquid refrigerant, and when cooling is not required, the liquid refrigerant is completely in the header tank 3, so that fluctuation of liquid during vehicle traveling is prevented, and the stability of the vehicle is prevented from being affected.
The air holes 401 are micropores, a gaseous refrigerant can pass through the first interlayer 4 and the air holes 401, and a liquid refrigerant can be isolated, specifically, after the refrigerant is changed from liquid to gas, the refrigerant can permeate through the air holes 401, and then is condensed by the heat exchanger 14 in the condensation chamber 2 to form liquid drops, and the diameter of the liquid drops is larger than that of the gaseous refrigerant, so that the liquid drops are difficult to flow out of the air holes 401. Further, the first interlayer 4 may be a rigid structure, and the air holes 401 are processed on the rigid structure; the first separation layer 4 may also be a material with air permeable holes 401, such as a film made of some high molecular functional materials. The second partition and the check valve 6 allow the liquid to enter the header tank 3, and prevent the liquid in the header tank 3 from flowing from the inside of the header tank 3 to the condensation chamber 2. The third partition plate and the control valve 8 can control the communication between the liquid refrigerant in the liquid collecting tank 3 and the evaporating chamber 1, so that the electromagnetic valve is opened and closed when the circulating cooling is required to be opened or is not required to be opened.
As another specific embodiment, the first barrier layer 4 is an arched barrier. Since the refrigerant may form liquid droplets after being condensed, and the liquid droplets have a certain self weight and may block the air holes 401 of the first partition layer 4, so that the gaseous refrigerant cannot permeate, the liquid refrigerant may be guided to the side surface of the evaporation chamber 1 by using the arch shape. And is favorable for gathering and evaporating gaseous refrigerant and guiding the gas to the upper cavity of the evaporation chamber 1. In particular, the side edges of the first baffle 4 are bent downwards and towards the header tank 3. Furthermore, the heat exchanger 14 is arranged above the arched partition, so that a circulation process of the intermediate gas flowing out and the surrounding liquid flowing in is formed.
In another specific embodiment, the header tank 3 is provided on a side surface of the evaporation chamber 1. The liquid refrigerant can be ensured to flow into the liquid collecting tank 3 from the arched partition plate. And, the liquid collecting tank 3 is symmetrically arranged on the side surface of the evaporation chamber 1, so that the influence on the stability of the vehicle caused by uneven gravity distribution is prevented. When two liquid collection tanks 3 are arranged, the first partition plate can be an arc-shaped plate; when collecting liquid case 3 is a plurality of, first baffle can be the pyramid, and is further, the edge is the arc limit, can reduce piling up of point department.
In another specific embodiment, the header tanks 3 are provided on both left and right sides of the evaporation chamber 1. Specifically, the vehicle is specified to have a forward direction, and if the liquid droplets move backward due to acceleration when the liquid header tank 3 is provided in the front-rear direction in consideration of acceleration occurring during traveling of the vehicle, the liquid droplets may be difficult to enter the liquid header tank 3 provided in the front. Therefore, the liquid collecting tank 3 is arranged at the left side and the right side of the evaporation chamber 1, and the arched partition plates are combined, so that the liquid refrigerant can enter the liquid collecting tank 3.
In another specific embodiment, the second partition 5 is arc-shaped with a downward middle part, and the check valve 6 is arranged at the bottom of the second partition 5. The arc can carry out the water conservancy diversion to the liquid drop to because in actual use, the liquid in the header tank 3 is not full of constantly, under this condition, can fluctuate in the header tank 3 under the liquid, can play the effect of shocking resistance to the liquid in the header tank 3 through curved second baffle, and then prevent to influence the stability of vehicle. Preferably, the front and rear portions of the second partition plate are bent upward, and the middle portion of the second partition plate is bent downward, so that the liquid is mainly fluctuated forward and backward during the traveling of the vehicle, and the liquid droplets can be prevented from flowing into the header tanks 3 even under acceleration by the arrangement in combination with the header tanks 3 provided at the left and right sides of the evaporation chamber 1. Of course, the arc shape is only preferred, and in a specific implementation, the second interlayer 5 can also be a zigzag shape with a downward middle part.
As another specific embodiment, a water pump 9 is further disposed between the liquid collecting tank 3 and the evaporation chamber 1, an input end of the water pump 9 is disposed at the inner bottom of the evaporation chamber 1, and an output end of the water pump 9 is disposed in the liquid collecting tank 3. The liquid remaining in the evaporation chamber 1 can be pumped into the header tank 3 by the water pump 9. Furthermore, in order to adapt to the second interlayer 5, the output end of the water pump 9 is connected with a three-way water delivery pipe 13, one end of the water delivery pipe 13 is connected with the output end of the water pump 9, and the other two end parts of the water delivery pipe 13 are respectively arranged at the upper parts of the two sides of the liquid collecting tank 3.
In another specific embodiment, a branch 10 is further provided between the header tank 3 and the evaporation chamber 1, one end of the branch 10 is provided at the input end of the check valve 6, and the other end of the branch 10 is provided at the input end of the water pump 9. Because the second baffle is the arc, consequently, when the liquid level is the same with check valve 6 height, the liquid drop can't independently get into header tank 3, then can lead to water pump 9 department with the liquid of many plays through branch road 10 to in taking out into header tank 3 through water pump 9. In particular, an end of the branch 10 is slightly higher than the input end of the one-way valve 6, so as to ensure that the liquid flows to the water pump 9 through the branch 10 only when the liquid cannot enter the one-way valve 6, i.e. when the liquid is accumulated.
In another specific embodiment, a plurality of circular wave-proof buffer pits 101 are provided in the evaporation chamber 1. During the cooling process, the vehicle may still be moving, and the impact generated by the liquid in the evaporation chamber 1 can be buffered by the circular wave-preventing buffer pits 101. Specifically, the circular wave-preventing buffer pit 101 is arranged on the inner side wall of the evaporation chamber 1.
In another specific embodiment, the front end and the rear end of the evaporation chamber 1 are provided with wave guards 11 arranged in the left-right direction, and the wave guards 11 are provided with corrugations axially arranged in the left-right direction. Since the power battery 15 has a rectangular structure, the long side of the rectangular structure faces in the front-rear direction. When the vehicle turns left and right, the liquid can flow to the two sides of the evaporation chamber 1 along waves, namely the circular wave-proof buffer pits 101 on the two sides, and the flow of the liquid is increased while the waves are prevented. When the vehicle accelerates or brakes, the liquid fluctuates front and back and passes through transverse waves, so that the buffer is realized, and the impact is reduced.
In another specific embodiment, the control valve 8 is a solenoid valve, and a temperature sensor 12 is connected to the control valve 8. The temperature sensor 12 can detect the temperature of the power battery 15, and when the temperature rises to a certain value, the electromagnetic valve can be controlled to be opened, so that liquid refrigerant flows out, and the power battery 15 is subjected to immersion cooling; when the temperature cooling reaches a certain value, the control electromagnetic valve is closed, so that the evaporation chamber 1 is separated from the liquid collecting box 3. Preferably, the temperature sensor 12 is arranged on the surface of the power battery 15, so that the temperature of the power battery 15 can be measured more accurately.
The invention provides a new energy automobile power battery cooling device, which comprises the following working processes:
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention may be understood by those of ordinary skill in the art according to specific situations.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a new energy automobile power battery cooling device which characterized in that: the battery cooling system comprises an evaporation chamber (1) for absorbing heat of a battery and evaporating a refrigerant, a condensation chamber (2) for absorbing heat of the refrigerant and condensing the refrigerant, and a liquid collecting tank (3) for collecting liquid refrigerant, wherein a first interlayer (4) is arranged between the evaporation chamber (1) and the condensation chamber (2), and a plurality of air holes (401) for gaseous refrigerant to pass through are formed in the first interlayer (4); a second interlayer (5) is arranged between the condensing chamber (2) and the liquid collecting tank (3), and a check valve (6) for liquid refrigerant to pass through is arranged on the second interlayer (5); and a third interlayer (7) is arranged between the liquid collecting tank (3) and the evaporation chamber (1), and a control valve (8) for liquid refrigerant to pass through is arranged on the third interlayer (7).
2. The new energy automobile power battery cooling device of claim 1, characterized in that: the first interlayer (4) is an arched clapboard.
3. The new energy automobile power battery cooling device of claim 1, characterized in that: the liquid collecting box (3) is arranged on the side surface of the evaporation chamber (1).
4. The cooling device for the power battery of the new energy automobile according to claim 3, characterized in that: the liquid collecting box (3) is arranged at the left side and the right side of the evaporation chamber (1).
5. The new energy automobile power battery cooling device of claim 1, characterized in that: the second interlayer (5) is arc-shaped with the middle part downward, and the one-way valve (6) is arranged at the bottom of the second interlayer (5).
6. The new energy automobile power battery cooling device of claim 1, characterized in that: still be equipped with water pump (9) between collection liquid case (3) and evaporating chamber (1), the interior bottom of evaporating chamber (1) is located to the input of water pump (9), the output of water pump (9) is located in collection liquid case (3).
7. The cooling device for the power battery of the new energy automobile according to claim 6, characterized in that: still be equipped with branch road (10) between collection liquid case (3) and evaporating chamber (1), the input end department of check valve (6) is located to one end of branch road (10), the input end department of water pump (9) is located to another tip of branch road (10).
8. The new energy automobile power battery cooling device of claim 1, characterized in that: a plurality of circular wave-proof buffering pits (101) are arranged in the evaporation chamber (1).
9. The new energy automobile power battery cooling device of claim 1, characterized in that: the front end and the rear end of the evaporation chamber (1) are provided with the swash plates (11) arranged along the left and right directions, and the swash plates (11) are provided with corrugations axially arranged along the left and right directions.
10. The new energy automobile power battery cooling device of claim 1, characterized in that: the control valve (8) is an electromagnetic valve, and the control valve (8) is connected with a temperature sensor (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211688054.2A CN115663351B (en) | 2022-12-28 | 2022-12-28 | New energy automobile power battery cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211688054.2A CN115663351B (en) | 2022-12-28 | 2022-12-28 | New energy automobile power battery cooling device |
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| CN115663351A true CN115663351A (en) | 2023-01-31 |
| CN115663351B CN115663351B (en) | 2023-04-18 |
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| CN202211688054.2A Active CN115663351B (en) | 2022-12-28 | 2022-12-28 | New energy automobile power battery cooling device |
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|---|---|
| CN115663351B (en) | 2023-04-18 |
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