CN113991208B - Liquid cooling power battery box - Google Patents
Liquid cooling power battery box Download PDFInfo
- Publication number
- CN113991208B CN113991208B CN202111164429.0A CN202111164429A CN113991208B CN 113991208 B CN113991208 B CN 113991208B CN 202111164429 A CN202111164429 A CN 202111164429A CN 113991208 B CN113991208 B CN 113991208B
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- Prior art keywords
- battery box
- cooling
- single battery
- battery
- box
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Classifications
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/6567—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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a liquid cooling power battery box. A liquid cooled power battery box comprising a battery box and a battery module, the battery box comprising a plurality of single battery boxes; the battery module is arranged in the single battery box; the cross-sectional area of each single battery box is gradually reduced along the flowing direction of the cooling liquid, a cooling plate is correspondingly arranged at the lower part of each single battery box, cooling liquid is arranged in the cooling plate and used for providing cooling capacity for the bottom of the battery module, the single battery boxes are fan-like when seen from top to bottom, and a plurality of single battery boxes are encircled to form a circular battery box; the battery modules in the single battery box are arranged according to arc tracks with different radiuses, and the battery modules on the same arc track are arranged at equal intervals. The invention provides a liquid cooling power battery box which has the advantages of good temperature uniformity and higher cooling efficiency.
Description
Technical Field
The invention belongs to the technical field of cooling, and relates to a liquid cooling power battery box.
Background
In recent years, research on new energy traffic equipment is a research hotspot in the current society, and research in each research institution is deeply developed, so that great economic benefits and social values are obtained. In a new energy automobile, liquid cooling and heat dissipation are required to be carried out on a columnar battery, the traditional battery box is square in structure, the batteries are transversely and uniformly arranged, the temperature of cooling liquid is gradually increased along the direction of a flow channel, the heat exchange efficiency is reduced, and the cooling effect of the tail end of the flow channel is poor; and the traditional liquid cooling battery box lacks the solution to the large calorific capacity of the bottom of single battery, finally leads to the poor temperature uniformity of the whole battery.
Therefore, the problems of uneven cooling, large temperature difference and the like of the cooling effect of the columnar battery are needed to be solved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a liquid cooling power battery box which has the advantages of good temperature uniformity and higher cooling efficiency.
The technical scheme for solving the problems is as follows: the utility model provides a liquid cooling power battery box which characterized in that:
the battery box comprises a plurality of single battery boxes and a battery module; the battery module is arranged in the single battery box;
the cross-sectional area of each single battery box is gradually reduced along the flowing direction of the cooling liquid, a cooling plate is correspondingly arranged at the lower part of each single battery box, cooling liquid is arranged in the cooling plate and used for providing cooling capacity for the bottom of the battery module, the single battery boxes are fan-like when seen from top to bottom, and a plurality of single battery boxes are encircled to form a circular battery box; the battery modules in the single battery box are arranged according to arc tracks with different radiuses, and the battery modules on the same arc track are arranged at equal intervals.
Further, the cooling liquid flows in from the side with the larger cross-sectional area of the unit cell case and flows out from the side with the smaller cross-sectional area.
Further, the single battery box is communicated with the runner of the cooling plate corresponding to the bottom of the single battery box.
Further, the cooling liquid flow direction in the single battery box is the same as or opposite to the cooling liquid flow direction in the corresponding cooling plate.
Further, when the cooling liquid flow direction in the single battery box is the same as the cooling liquid flow direction in the corresponding cooling plate, the cooling plate is connected with the outlet flow passage of the corresponding single battery box, and the outlet water passages of each single battery box are connected with each other.
Further, when the flow direction of the cooling liquid in the single battery box is opposite to the flow direction of the cooling liquid in the corresponding cooling plate, the outlet flow channel of the single battery box is connected with the inlet flow channel of the corresponding cooling plate, and the flow channels of the single battery boxes are mutually independent.
Further, the battery module comprises single cylindrical batteries, the single cylindrical batteries are placed in a sleeve of the battery box, a gap between the single cylindrical batteries and the sleeve is filled with phase change materials, and the shape of the sleeve caters for incoming flow and adopts a shape for enhancing heat exchange.
The invention has the advantages that:
1) In the liquid cooling power battery box, when cooling liquid flows in from the inlet runner at one side of the cavity, the cross section area of the cavity is gradually reduced along the flowing direction of the cooling liquid when the batteries are cooled, so that the flow speed of the cooling liquid is gradually increased, the heat convection of the batteries at the tail end of the runner is enhanced, and the uniform cooling effect of each battery is realized; the cooling liquid flowing through the bottom plate is used for providing cooling capacity for the bottom of the battery with large heating value, so that the temperature difference between each section of the battery is reduced, and the temperature uniformity of the battery is further improved.
2) The liquid cooling power battery box disclosed by the invention has the advantages that the temperature uniformity and the integral cooling effect of the single battery are enhanced, the structure is simple, the circulation of cooling liquid can depend on an air conditioning system of an automobile, no additional moving parts are needed, the battery box is suitable for the space in the automobile, the battery is convenient to detach, and the battery box is suitable for the running environment of the electric automobile.
Drawings
FIG. 1 is a schematic diagram of the general composition of a liquid cooled power cell box according to the present invention;
fig. 2 is a schematic diagram of the composition structure of the battery cell case according to the present invention;
FIG. 3 is an enlarged schematic view of a partial structure of the battery cell shown in FIG. 2B;
FIG. 4 is a schematic view of the cross-sectional structure A-A in FIG. 2;
FIG. 5 is a schematic diagram showing a cross-sectional structure of the A-A direction in FIG. 2.
In the figure: 1. the battery pack comprises a single battery box, a battery module, a cooling plate, a main outlet flow channel, a single cylindrical battery, a sleeve, a phase change material and a phase change material.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
A liquid cooling power battery box comprises a battery box and a plurality of battery modules 2. The battery box is divided into a plurality of single battery boxes 1, the cross sectional area of each single battery box 1 is gradually reduced along the flowing direction of the cooling liquid, and the battery modules 2 in the single battery boxes 1 are distributed in an array; a cooling plate 3 is correspondingly arranged at the lower part of each single battery box 1. The cooling liquid flowing through the bottom plate is used for providing cooling capacity for the bottom of the battery with large heating value, so that the temperature difference between each section of the battery is reduced, and the temperature uniformity of the battery is further improved. Preferably, the battery modules 2 in the unit battery case 1 are arranged in circular arc trajectories of different radii, and the battery modules 2 on the same circular arc trajectory are arranged at equal intervals. The battery box is round when seen from top to bottom, the single battery box 1 is fan-like when seen from top to bottom, and the shape of the cooling plate 3 is the same as the shape of the corresponding single battery box 1. The battery box shape is suitable for the space in the vehicle, and the battery is convenient to detach and suitable for the running environment of the electric vehicle.
As a preferred embodiment of the present invention, the flow channels of the cooling plates 3 corresponding to the bottom of the unit cell case 1 are communicated.
The cooling liquid flows in from the side of the cell box 1 where the cross-sectional area is large, and flows out from the side where the cross-sectional area is small. When cooling liquid flows in from an inlet runner at one side of the cavity, the cross section area of the cavity is gradually reduced along the flowing direction of the cooling liquid when the batteries are cooled, so that the flow speed of the cooling liquid is gradually increased, the heat convection of the batteries at the tail end of the runner is enhanced, and the uniform cooling effect of each battery is realized.
As a preferred embodiment of the present invention, each pair of the unit cell cases 1 and the cooling plates 3 has the same or opposite flow direction of the cooling liquid flowing through the cooling plates 3 as the flow direction of the cooling liquid flowing through the unit cell cases 1.
When the flow direction of the cooling liquid flowing through the cooling plates 3 is the same as the flow direction of the cooling liquid flowing through the unit cell cases 1, each cooling plate 3 is connected to the outlet flow passage of the paired unit cell case 1, and the outlet water passages of the respective unit cell cases 1 are connected to each other.
When the flow direction of the cooling liquid flowing through the cooling plate 3 is opposite to the flow direction of the cooling liquid flowing through the single battery boxes 1, the outlet flow channel of each single battery box 1 is connected with the inlet flow channel of the matched cooling plate 3, and the flow channels of the single battery boxes 1 are mutually independent.
Preferably, in the battery module 2, the single cylindrical battery 201 is placed in the sleeve 202 of the battery box, the gap between the cylindrical battery and the sleeve 202 is filled with the phase change material 203, and the sleeve 202 is shaped to adapt to the incoming flow and adopts a shape for enhancing heat exchange. Example 1
Referring to fig. 1 to 4, there is provided a liquid cooling power battery box structure, which comprises a battery box and a plurality of battery modules 2, wherein six single battery boxes 1 are divided in the battery box, the cross-sectional area of each single battery box 1 in the embodiment is gradually reduced along the flowing direction of cooling liquid, the battery modules 2 are arranged along the flowing direction of the cooling liquid along the circular arc tracks with different radiuses, and a cooling plate 3 is arranged at the lower part of each single battery box 1.
Referring to fig. 2, the cooling liquid enters the unit cell case 1 from the left side having a large cross-sectional area, and cools the battery modules 2 in the unit cell case 1. Then flows out from the right side of the cell box 1 where the cross-sectional area is small, and the temperature of the coolant gradually increases along the flow direction of the coolant. Meanwhile, in the present invention, the cross-sectional area of the unit cell case 1 is gradually reduced along the flow direction of the coolant, so that the flow rate of the coolant is gradually increased, and the heat convection coefficient of the battery module 2 and the coolant is increased. Thereby, the same heat dissipation of each battery module 2 in the single battery box 1 can be ensured, and the temperature uniformity among the battery modules 2 can be ensured.
Referring to fig. 4, the flowing direction of the cooling liquid in the cooling plate 3 is opposite to that of the unit cell case 1, the cooling liquid flows into the cooling plate 3 after flowing out of the unit cell case 1, the bottom of the battery module 2 is continuously cooled, the heat exchange capacity of the battery is reduced due to the fact that the temperature of the cooling liquid rises after passing through the heat exchange of the battery case, the effect is weaker when the cooling liquid flows through the cooling plate 3 to cool the battery module 2, and the bottom of the battery is additionally cooled by a small amount, so that the temperature uniformity of the unit cells of the battery module 2 is ensured aiming at the larger heating value of the bottom of the battery module 2.
Referring to fig. 3, the battery module 2 includes a single cylindrical battery 201, a sleeve 202, and a phase change material 203 filled between the sleeve 202 and the battery for heat transfer while improving the temperature uniformity of the single battery. The sleeve 202 is cylindrical in shape.
Example 2
As shown in fig. 1, 2, 3 and 5, the present embodiment is different from embodiment 1 in that the flow direction of the coolant in the cooling plate 3 is the same as that of the unit cell case 1, the coolant flows into the unit cell case 1 and the cooling plate 3 through three-way valves, respectively, and the flow distribution of each branch can be changed according to the kind of battery and the operating condition. And then the two branches are converged at the outlet through a three-phase valve and connected with the outlet flow channels and the outlet flow channels of other single battery boxes 1 to be connected with the main outlet flow channel 4. In this embodiment, the cooling liquid in the cooling plate 3 is more advantageous to cool the bottom of the battery module 2.
The foregoing description is only exemplary embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention, or direct or indirect application in other related system fields are included in the scope of the present invention.
Claims (3)
1. A liquid cooling power battery box, characterized in that:
the battery box comprises a plurality of single battery boxes (1) and a battery module (2); the battery module (2) is arranged in the single battery box (1);
the cross-sectional area of each single battery box (1) is gradually reduced along the flowing direction of the cooling liquid, and a cooling plate (3) is correspondingly arranged at the lower part of each single battery box (1); the cooling plate (3) is internally provided with cooling liquid for providing cooling capacity for the bottom of the battery module (2); the single battery boxes (1) are fan-like when seen from top to bottom, and a plurality of single battery boxes (1) enclose a circular battery box; the battery modules (2) in the single battery box (1) are arranged according to arc tracks with different radiuses, and the battery modules (2) on the same arc track are arranged at equal intervals;
in the single battery box (1), the cooling liquid flows in from the side with large cross section of the single battery box (1) and flows out from the side with small cross section;
the single battery box (1) is communicated with a runner of a cooling plate (3) corresponding to the bottom of the single battery box;
the flow direction of the cooling liquid in the single battery box (1) is the same as or opposite to the flow direction of the cooling liquid in the corresponding cooling plate (3);
when the cooling liquid flow direction in the single battery box (1) is the same as the cooling liquid flow direction in the corresponding cooling plate (3), the cooling plate (3) is connected with the outlet flow passage of the corresponding single battery box (1), and the outlet water passages of each single battery box (1) are connected with each other;
when the flow direction of the cooling liquid in the single battery box (1) is opposite to the flow direction of the cooling liquid in the corresponding cooling plate (3), the outlet flow channel of the single battery box (1) is connected with the inlet flow channel of the corresponding cooling plate (3), and the flow channels of the single battery boxes (1) are mutually independent.
2. A liquid cooled power cell box as claimed in claim 1, wherein:
the battery module (2) comprises single cylindrical batteries (201), and the single cylindrical batteries (201) are placed in a sleeve (202) of a battery box.
3. A liquid cooled power cell box as claimed in claim 2, wherein:
the gap between the single cylindrical battery (201) and the sleeve (202) is filled with phase change material (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111164429.0A CN113991208B (en) | 2021-09-30 | 2021-09-30 | Liquid cooling power battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111164429.0A CN113991208B (en) | 2021-09-30 | 2021-09-30 | Liquid cooling power battery box |
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| Publication Number | Publication Date |
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| CN113991208A CN113991208A (en) | 2022-01-28 |
| CN113991208B true CN113991208B (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111164429.0A Active CN113991208B (en) | 2021-09-30 | 2021-09-30 | Liquid cooling power battery box |
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| CN113991208A (en) | 2022-01-28 |
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