CN112002954A - Liquid immersion cooling type power battery pack - Google Patents
Liquid immersion cooling type power battery pack Download PDFInfo
- Publication number
- CN112002954A CN112002954A CN202010671994.5A CN202010671994A CN112002954A CN 112002954 A CN112002954 A CN 112002954A CN 202010671994 A CN202010671994 A CN 202010671994A CN 112002954 A CN112002954 A CN 112002954A
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- power battery
- heat exchange
- cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a liquid immersion cooling type power battery pack, which comprises a power battery pack and a cooling box, wherein a waterproof breathable film is arranged in the cooling box, the cooling box is divided into a liquid cavity at the lower part and a gas cavity at the upper part by the waterproof breathable film, the liquid cavity is connected with a liquid inlet pipe and a liquid outlet pipe for introducing insulating cooling liquid and circulating, the gas cavity is connected with an exhaust pipe, the exhaust pipe is connected with a condensation box, the bottom end of the condensation box is communicated with the liquid inlet pipe, a valve is arranged on a communication pipeline, and the power battery pack is installed in the liquid cavity in a suspension manner. The power battery pack adopts a liquid immersion cooling mode, and the insulating cooling liquid is in direct contact with the surface of the battery, so that the heat exchange efficiency and the heat exchange uniformity can be improved, and the phenomena of battery corrosion, short circuit and the like can not be caused; when the heat exchange is carried out by immersion contact, the insulation cooling liquid can be accelerated to evaporate after being heated, and the reduction of the overall temperature in the cooling box is further promoted by utilizing the principle of evaporation heat absorption, so that the cooling effect is greatly improved.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a liquid immersion cooling type power battery pack.
Background
The lithium ion battery has occupied most market shares of batteries for electric vehicles by virtue of the advantages of high energy density and power density, large specific energy, long cycle life, high energy conversion rate, low self-discharge rate, no memory effect and the like, but the performance of the lithium ion battery is greatly influenced by temperature. The power battery can generate heat in the charging process and the discharging process, the charging process is an exothermic reaction and has internal resistance of the battery, the temperature of the battery can obviously rise in the quick charging process, and particularly, the heat generation is serious when the battery is quickly fully charged; in the discharging process, the battery heating is mainly joule heat caused by the internal resistance of the battery; the long-term over-temperature of the batteries can have adverse effects on the service life of the batteries and even can overheat and spontaneously combust, so that the batteries need to control the internal temperature within a reasonable range.
At present, the cooling mode of the existing high-power battery pack mainly takes water circulation cooling as a main mode. The water cooling generally needs cooling water tank, circulating water pipe, radiator, sealing device, electric water pump etc. the main defect that the water cooling exists is: the water cooling system has large volume, a large number of water cooling zones need to be arranged in the battery gaps, the structure is complex, and due to indirect contact, the heat exchange cooling efficiency is general.
Disclosure of Invention
The invention aims to provide a liquid immersion cooling type power battery pack, which solves the problems of large volume, complex structure and general cooling efficiency of the water cooling system of the conventional power battery pack.
The invention realizes the purpose through the following technical scheme:
the utility model provides a liquid submergence cooled power battery group, includes the power battery group, still includes the cooler bin, the inside of cooler bin is equipped with waterproof ventilated membrane, waterproof ventilated membrane separates the cooler bin for the liquid chamber of lower part and the gaseous chamber on upper portion, the liquid chamber is connected with feed liquor pipe and drain pipe for let in insulating coolant liquid and circulate, the gaseous chamber is connected with the blast pipe, the blast pipe is connected with the condenser bin, the bottom and the feed liquor pipe intercommunication of condenser bin, and be equipped with the valve on the intercommunication pipeline, the inside at the liquid chamber is installed in the power battery group hangs.
The condensing box is formed by connecting an outer cylinder and an inner cylinder, circulating cooling liquid is introduced into a gap between the outer cylinder and the inner cylinder, the top of the inner cylinder is communicated with an exhaust pipe, and the bottom of the inner cylinder is communicated with a liquid inlet pipe.
The further improvement is that the liquid inlet pipe is provided with a branch pipe, the branch pipe is separated from the liquid inlet pipe, and the branch pipe is firstly connected into a gap between the outer cylinder and the inner cylinder and then flows back to the liquid inlet pipe.
The improved structure is characterized in that the side wall of the inner barrel is provided with a plurality of vacuum heat exchange tubes, each vacuum heat exchange tube is obliquely arranged, the higher end of each vacuum heat exchange tube is positioned in a gap between the outer barrel and the inner barrel, the lower end of each vacuum heat exchange tube is positioned in the inner barrel, and evaporation liquid is stored in the vacuum heat exchange tubes.
The further improvement is that the included angle between the vacuum heat exchange tube and the vertical surface is 30-45 degrees.
The liquid cavity is internally provided with a plurality of fans, the fans are positioned at the bottom of the power battery pack, and the blowing direction of the fans faces to the battery gap of the power battery pack.
The waterproof breathable film is further improved in that the waterproof breathable film is obliquely arranged, the side of the gas cavity is detachably connected with a liquid accumulation tank, and the liquid accumulation tank is communicated with the lower end of the waterproof breathable film.
The further improvement is that the inclination angle of the waterproof breathable film is 5-10 degrees.
The invention has the beneficial effects that: the power battery pack adopts a liquid immersion cooling mode, and the insulating cooling liquid is in direct contact with the surface of the battery, so that the heat exchange efficiency and the heat exchange uniformity can be improved, the power battery is always in a safe temperature environment, and the phenomena of battery corrosion, short circuit and the like can not be caused; in addition, when submerging the contact heat transfer, can accelerate evaporation after insulating coolant intensifies, utilize the endothermic principle of evaporation to further promote the reduction of the interior bulk temperature of cooler bin to promote the cooling effect by a wide margin, and the gaseous permeable waterproof ventilated membrane of gas after the evaporation gets into the gas intracavity, and drops into cooling circulation system once more after the condensation is retrieved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the condensing box;
in the figure: 1. a power battery pack; 2. a cooling tank; 3. a waterproof breathable film; 4. a liquid chamber; 5. a gas chamber; 6. a liquid inlet pipe; 7. a liquid outlet pipe; 8. an exhaust pipe; 9. a condenser tank; 901. an outer cylinder; 902. an inner barrel; 903. a vacuum heat exchange tube; 10. a valve; 11. a branch pipe; 12. a fan; 13. a liquid accumulation tank.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Combine shown in fig. 1 and fig. 2, a liquid submergence cooled power battery group, including power battery group 1, still include cooler bin 2, cooler bin 2's inside is equipped with waterproof ventilated membrane 3, waterproof ventilated membrane 3 separates cooler bin 2 for liquid chamber 4 and the gas chamber 5 on upper portion of lower part, liquid chamber 4 is connected with feed liquor pipe 6 and drain pipe 7, be used for letting in insulating coolant and circulate, gas chamber 5 is connected with blast pipe 8, blast pipe 8 is connected with condensing box 9, the bottom and the feed liquor pipe 6 intercommunication of condensing box 9, and be equipped with valve 10 on the intercommunication pipeline, power battery group 1 hangs the inside of installing at liquid chamber 4.
Wherein, feed liquor pipe 6 and drain pipe 7 form the circulation pipeline, and establish actuating mechanism and cooling body (for prior art, do not combine the figure to describe in detail) on the circulation pipeline, low temperature insulation coolant liquid is through feed liquor pipe 6 leading-in liquid chamber 4 in and fill up liquid chamber 4, with power battery group 1 complete submergence, contact the heat transfer, insulation coolant liquid temperature rises, is discharged by drain pipe 7 again, high temperature insulation coolant liquid circulates again after cooling mechanism's cooling. And when the immersion contact heat exchange, because insulating coolant temperature risees, its evaporation rate accelerates, utilizes the endothermic principle of evaporation to further promote the reduction of the interior bulk temperature of cooler bin to promote the cooling effect by a wide margin. The gas generated after evaporation permeates the waterproof breathable film 3 to enter the gas cavity 5, the gas is filled into the condensing box 9 through the exhaust pipe 8, the gas is quickly liquefied to become liquid and is temporarily stored in the condensing box 9, and therefore the stable air pressure in the gas cavity 5, the exhaust pipe 8 and the condensing box 9 can be maintained. When the liquid in the condensation tank 9 is full, the valve 10 may be opened to introduce the liquid into the inlet pipe 6 and then the valve 10 may be closed again when the battery cooling cycle is not performed. The valve 10 may be in communication with a vehicle control system, the opening and closing of which is controlled directly by the control system.
In the invention, the condensing box 9 is formed by connecting an outer cylinder 901 and an inner cylinder 902, circulating cooling liquid is introduced into a gap between the outer cylinder 901 and the inner cylinder 902, the top of the inner cylinder 902 is communicated with an exhaust pipe 8, and the bottom of the inner cylinder 902 is communicated with a liquid inlet pipe 6. The liquid inlet pipe 6 is provided with a branch pipe 11, the branch pipe 11 is branched from the liquid inlet pipe 6, and the branch pipe 11 firstly enters the gap between the outer cylinder 901 and the inner cylinder 902 and then flows back to the liquid inlet pipe 6. During circulation, part of the insulating cooling liquid enters the gap between the outer cylinder 901 and the inner cylinder 902 through the branch pipe 11 to be used as a cooling medium of steam, so that the steam inside the inner cylinder 902 is rapidly condensed into a liquid state, the structure can be simplified, and the existing cold source is fully utilized.
Particularly, the side wall of the inner cylinder 902 is provided with a plurality of vacuum heat exchange tubes 903, the vacuum heat exchange tubes 903 are vacuumized, evaporated liquid is stored in the vacuum heat exchange tubes 903, and the critical temperature of the evaporated liquid is reduced in a vacuum environment. Each vacuum heat exchange tube 903 is obliquely arranged, the higher end of the vacuum heat exchange tube 903 is positioned in the gap between the outer cylinder 901 and the inner cylinder 902, and the lower end of the vacuum heat exchange tube 903 is positioned in the inner cylinder 902. After steam enters the condensing box 9 through the exhaust pipe 8, part of the steam directly contacts with the side wall of the inner cylinder 902 to exchange heat, and the other part of the steam contacts with the surface of the lower end of the vacuum heat exchange tube 903, so that evaporated liquid in the vacuum heat exchange tube 903 is vaporized and changed into gas to move upwards, enters the upper end of the vacuum heat exchange tube 903, is changed into liquid again under the cooling effect of the cooling liquid and flows back to the lower end, and therefore the circulation is repeated, the integral condensation effect of the condensing box 9 is improved, and the steam can be rapidly condensed into liquid to be stored after entering. And the acute angle included angle between the vacuum heat exchange tube 903 and the vertical surface is 30-45 degrees, so that the gas can smoothly slide down after being condensed into liquid.
In the invention, a plurality of fans 12 are arranged in the liquid cavity 4, the fans 12 are positioned at the bottom of the power battery pack 1, and the blowing direction of the fans 12 faces to the battery gap of the power battery pack 1.
In the invention, the waterproof breathable film 3 is obliquely arranged, the side edge of the gas cavity 5 is detachably connected with the liquid accumulation tank 13, and the liquid accumulation tank 13 is communicated with the lower end position of the waterproof breathable film 3. After steam formed by evaporation in the liquid cavity 4 enters the gas cavity 5, most of the steam enters the condensation box 9, but the steam with a very small quantity is not excluded to be directly changed into liquid in the gas cavity 5, attached to the inner wall and dropped on the upper surface of the waterproof breathable film 3. This application sets up the slope structure with waterproof ventilated membrane 3, and waterproof ventilated membrane 3's inclination is 5-10 (with horizontal plane contained angle), and the coolant liquid of drippage can slowly flow to hydrops jar 13 in like this, avoids liquid to amass more, influences the membrane permeability. The liquid accumulation tank 13 needs to be unloaded and dumped periodically, and the liquid accumulation tank can be dumped sequentially in 6-12 months generally because of less bearing capacity.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. A liquid immersion cooled power cell stack, comprising a power cell stack (1), characterized in that: still include cooler bin (2), the inside of cooler bin (2) is equipped with waterproof ventilated membrane (3), waterproof ventilated membrane (3) are separated cooler bin (2) for liquid chamber (4) and the gas chamber (5) on upper portion of lower part, liquid chamber (4) are connected with feed liquor pipe (6) and drain pipe (7) for let in insulating coolant liquid and circulate, gas chamber (5) are connected with blast pipe (8), blast pipe (8) are connected with condenser box (9), the bottom and feed liquor pipe (6) the intercommunication of condenser box (9), and be equipped with valve (10) on the intercommunication pipeline, power battery group (1) is hung and is installed in the inside of liquid chamber (4).
2. A liquid submersion-cooled power battery as claimed in claim 1, wherein: the condenser box (9) is formed by connecting an outer cylinder (901) and an inner cylinder (902), circulating cooling liquid is introduced into a gap between the outer cylinder (901) and the inner cylinder (902), the top of the inner cylinder (902) is communicated with an exhaust pipe (8), and the bottom of the inner cylinder (902) is communicated with a liquid inlet pipe (6).
3. A liquid submersion-cooled power battery as claimed in claim 2, wherein: a branch pipe (11) is arranged on the liquid inlet pipe (6), the branch pipe (11) is divided from the liquid inlet pipe (6), and the branch pipe (11) is firstly connected into a gap between the outer cylinder (901) and the inner cylinder (902) and then flows back to the liquid inlet pipe (6).
4. A liquid submersion-cooled power battery according to claim 2 or 3, wherein: the side wall of the inner barrel (902) is provided with a plurality of vacuum heat exchange tubes (903), each vacuum heat exchange tube (903) is obliquely arranged, the higher end of each vacuum heat exchange tube (903) is located in a gap between the outer barrel (901) and the inner barrel (902), the lower end of each vacuum heat exchange tube is located inside the inner barrel (902), and evaporation liquid is stored inside each vacuum heat exchange tube (903).
5. A liquid submersion-cooled power battery in accordance with claim 4, wherein: the included angle of the vacuum heat exchange tube (903) and the vertical surface is 30-45 degrees.
6. A liquid submersion-cooled power battery as claimed in claim 1, wherein: a plurality of fans (12) are arranged in the liquid cavity (4), the fans (12) are located at the bottom of the power battery pack (1), and the blowing direction of the fans (12) faces to the battery gaps of the power battery pack (1).
7. A liquid submersion-cooled power battery as claimed in claim 1, wherein: the waterproof breathable film (3) is obliquely arranged, the side of the gas cavity (5) is detachably connected with a liquid accumulation tank (13), and the liquid accumulation tank (13) is communicated with the lower end of the waterproof breathable film (3).
8. A liquid submersion-cooled power battery as claimed in claim 7, wherein: the inclination angle of the waterproof breathable film (3) is 5-10 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010671994.5A CN112002954B (en) | 2020-07-14 | 2020-07-14 | Liquid immersion cooling type power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010671994.5A CN112002954B (en) | 2020-07-14 | 2020-07-14 | Liquid immersion cooling type power battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112002954A true CN112002954A (en) | 2020-11-27 |
| CN112002954B CN112002954B (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010671994.5A Active CN112002954B (en) | 2020-07-14 | 2020-07-14 | Liquid immersion cooling type power battery pack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993440A (en) * | 2020-12-15 | 2021-06-18 | 鹤山市世拓电子科技有限公司 | Flame-proof battery pack |
| CN113471574A (en) * | 2021-09-02 | 2021-10-01 | 深圳联钜自控科技有限公司 | Temperature control device and method |
| CN116315288A (en) * | 2023-05-17 | 2023-06-23 | 山东旭尊电子科技有限公司 | Immersed energy storage battery box and battery cabinet thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993440A (en) * | 2020-12-15 | 2021-06-18 | 鹤山市世拓电子科技有限公司 | Flame-proof battery pack |
| CN113471574A (en) * | 2021-09-02 | 2021-10-01 | 深圳联钜自控科技有限公司 | Temperature control device and method |
| CN113471574B (en) * | 2021-09-02 | 2022-01-04 | 深圳联钜自控科技有限公司 | Temperature control device and method |
| CN116315288A (en) * | 2023-05-17 | 2023-06-23 | 山东旭尊电子科技有限公司 | Immersed energy storage battery box and battery cabinet thereof |
| CN116315288B (en) * | 2023-05-17 | 2023-09-08 | 山东旭尊电子科技有限公司 | Immersed energy storage battery box and battery cabinet thereof |
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| Publication number | Publication date |
|---|---|
| CN112002954B (en) | 2022-08-30 |
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