CN115498327A - Cooling device and battery module - Google Patents

Cooling device and battery module Download PDF

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Publication number
CN115498327A
CN115498327A CN202211216172.3A CN202211216172A CN115498327A CN 115498327 A CN115498327 A CN 115498327A CN 202211216172 A CN202211216172 A CN 202211216172A CN 115498327 A CN115498327 A CN 115498327A
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CN
China
Prior art keywords
cooling
liquid inlet
plate
flow channel
flow
Prior art date
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Pending
Application number
CN202211216172.3A
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Chinese (zh)
Inventor
杜帅华
马腾飞
杨瑞琦
郭忠玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202211216172.3A priority Critical patent/CN115498327A/en
Publication of CN115498327A publication Critical patent/CN115498327A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a cooling device and a battery module. A cooling device, comprising: the cooling plate comprises a plurality of first cooling flow channels, each first cooling flow channel comprises a first liquid inlet and a first liquid outlet, each first cooling flow channel is used for circulating a refrigerant, the refrigerant flows from the first liquid inlet to the first liquid outlet, and the flow area of each first cooling flow channel is increased in the refrigerant flowing direction from the first liquid inlet to the first liquid outlet. According to the invention, the plurality of first cooling channels for the refrigerant to flow are arranged on the cooling plate, and the cross sectional areas (flow areas) of the plurality of first cooling channels in the direction from the liquid inlet to the liquid outlet are increased, so that on one hand, the pressure drop of the refrigerant in the flow channel in the process of converting from liquid to gas is changed, the heat exchange efficiency is improved, and on the other hand, the resistance of the refrigerant in the flow channel flowing process is reduced.

Description

Cooling device and battery module
Technical Field
The invention relates to the technical field of batteries, in particular to a cooling device and a battery module.
Background
With the increase of the energy-saving and emission-reducing requirements, the low-carbon industry economy rises rapidly, wherein the pure electric vehicle develops particularly rapidly due to the characteristics of energy conservation and environmental protection. The power battery is used as the power core of the pure electric vehicle, and the capacity, the service life, the charging and discharging time and the safety of the power battery are all restricted by the working temperature of the battery. Therefore, to ensure the proper operation of the battery, the battery pack is equipped with a cooling system.
With the development of the battery quick-charging technology and the improvement of the discharge rate, the method is of great importance in quickly reducing the temperature of the battery to ensure the safety and the performance of the battery. The battery temperature rise of solving above-mentioned battery temperature rise at present mainly adopts liquid cooling or directly cold technique, nevertheless has following problem in the liquid cooling technique use: 1. the closer to the coolant outlet, the higher the battery temperature; 2. the required cooling liquid amount is large, and the occupied space of the system is large; 3. the cooling efficiency is low, which is only about 1/3 of that of the direct cooling technology. The direct cooling technology has the problems of high cooling efficiency and small occupied space, but has the problems of large flow resistance, uneven temperature distribution of inlet and outlet batteries, uneven flow distribution and the like.
Disclosure of Invention
The present invention provides a cooling device and a battery module, which overcome the shortcomings of the prior art.
The present invention provides a cooling device, comprising: the cooling plate comprises a plurality of first cooling flow channels, each first cooling flow channel comprises a first liquid inlet and a first liquid outlet, each first cooling flow channel is used for circulating a refrigerant, the refrigerant flows from the first liquid inlet to the first liquid outlet, and the flow area of each first cooling flow channel is increased along the refrigerant circulation direction from the first liquid inlet to the first liquid outlet.
In some embodiments, a plurality of the first cooling flow passages are arranged spaced apart from one another;
the cooling device further comprises a first communicating pipe, the first liquid inlets are communicated with the first communicating pipe, the first communicating pipe is used for circulating refrigerants, and the flow area of each first cooling flow channel is increased from the first liquid inlet to the refrigerant flowing direction of the first liquid outlet.
In some embodiments, each of the second cooling flow passages includes a second liquid inlet and a second liquid outlet, and each of the second cooling flow passages is configured to circulate a cooling medium, which flows from the second liquid inlet to the second liquid outlet, wherein a flow area of each of the second cooling flow passages increases as the second cooling flow passage approaches the second liquid outlet in a flow direction from the second liquid inlet to the second liquid outlet;
the second liquid inlet is arranged on the same side as the first liquid outlet, and the second liquid outlet is arranged on the same side as the first liquid inlet, so that the flow direction of the refrigerant in the first cooling flow channel is opposite to the flow direction of the refrigerant in the second cooling flow channel.
In some embodiments, a plurality of the second cooling flow passages are arranged spaced apart from one another;
the cooling device further comprises a second communicating pipe, the plurality of second liquid inlets are communicated with the second communicating pipe, the second communicating pipe is used for circulating a refrigerant, and in the circulating direction of the refrigerant in the second communicating pipe, the liquid inlet area of the second liquid inlets, which is closer to the upstream, is larger.
In some embodiments, the flow area of the first cooling flow channel gradually increases from the first liquid inlet to the first liquid outlet to form a gradual flow channel;
and/or the presence of a gas in the atmosphere,
the flow area of the second cooling flow channel is gradually increased from the second liquid inlet to the second liquid outlet to form a gradually-changed flow channel.
In some embodiments, the first cooling flow passage comprises a first gradual transition and/or a first abrupt transition;
and/or the presence of a gas in the gas,
the second cooling flow passage includes a second gradual transition and/or a second abrupt transition.
In some embodiments, a plurality of first ribs extending along the length direction of the cooling plate are formed in the cooling plate, and a gap between every two adjacent first ribs forms the first cooling flow channel; alternatively, a plurality of first flow holes extending in a length direction thereof are formed in the cooling plate, and each of the flow holes forms the first cooling flow passage.
In some embodiments, a plurality of second ribs extending along the length direction of the cooling plate are formed in the cooling plate, and a gap between every two adjacent second ribs forms the second cooling flow channel; or a plurality of second flow through holes extending along the length direction of the cooling plate are formed in the cooling plate, and each flow through hole forms the second cooling flow channel.
In some embodiments, the cooling plates are provided in two, including a first cooling plate and a second cooling plate, the first cooling plate being disposed opposite the second cooling plate,
wherein, the first liquid inlet of the first cooling flow channel of the first cooling plate is communicated with the first liquid inlet of the first cooling flow channel of the second cooling plate through a first liquid inlet pipe, the first liquid outlet of the first cooling flow channel of the first cooling plate is communicated with the first liquid outlet of the first cooling flow channel of the second cooling plate through a first liquid outlet pipe,
and a second liquid inlet of a second cooling flow channel of the second cooling plate is communicated with a second liquid inlet of a second cooling flow channel of the second cooling plate through a second liquid inlet pipe, and a second liquid outlet of the second cooling flow channel of the second cooling plate is communicated with a second liquid outlet of the second cooling flow channel of the second cooling plate through a second liquid outlet pipe.
The present invention also provides a battery module, including:
a battery pack;
the cooling device according to any one of the above embodiments, wherein the cooling plate of the cooling device is located on at least one side surface and/or bottom surface of the battery pack.
In some embodiments, further comprising: the fixing structure comprises a positioning plate and a fixing band, the positioning plate is arranged at two ends of the battery pack respectively, the fixing band is connected with the positioning plate and is bound around the battery pack, and the positioning plate is supported on the cooling plate.
In some embodiments, the fixation structure further comprises: the locking assembly comprises a locking assembly supporting plate and locking plates, the supporting plate is arranged on the positioning plate and supported on the upper surface and the lower surface of the cooling plate, and the locking plates are detachably connected with the supporting plate respectively and are positioned on the side surfaces of the cooling plate.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
according to the invention, the plurality of first cooling channels for the refrigerant to flow are arranged on the cooling plate, and the cross sectional areas (flow areas) of the plurality of first cooling channels in the direction from the liquid inlet to the liquid outlet are increased, so that on one hand, the pressure drop of the refrigerant in the flow channel in the process of converting from liquid to gas is changed, the heat exchange efficiency is improved, and on the other hand, the resistance of the refrigerant in the flow channel flowing process is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view illustrating the structure of a battery module according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a cooling device according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic view of a cooling flow path configuration shown in accordance with an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating cooling channel inlet and outlet configurations in accordance with an exemplary embodiment of the present invention;
FIG. 5 is a schematic view of a fixture shown in accordance with an exemplary embodiment of the present invention;
fig. 6 is a diagram illustrating a temperature control logic of a direct cooling system of a battery module according to an exemplary embodiment of the present invention;
it should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The invention provides a cooling device for cooling a battery. The cooling medium flows through the flow channel with the flow area changed in the cooling plate, so that the temperature of the battery in the processes of quick charging and high-rate discharging can be quickly reduced, the flow resistance of the cooling medium in the flow channel is reduced, the flow distribution uniformity of the cooling medium is improved, and the temperature uniformity of the battery is improved.
As shown in fig. 1 to 5, the cooling device of the present invention includes: at least one cooling plate 1, the cooling plate 1 includes a plurality of first cooling flow channels 10, each first cooling flow channel 10 includes a first liquid inlet 11 and a first liquid outlet 12, each first cooling flow channel is used for circulating a refrigerant to absorb heat of a battery, the refrigerant flows from the first liquid inlet 11 to the first liquid outlet 12, wherein a flow area of each first cooling flow channel 10 increases in a refrigerant flowing direction from the first liquid inlet 11 to the first liquid outlet 12.
According to the invention, the plurality of first cooling channels 10 for the refrigerant to flow are arranged on the cooling plate 1, and the cross sectional areas (flow areas) of the plurality of first cooling channels 10 in the direction from the liquid inlet 11 to the liquid outlet 12 are increased, so that on one hand, the pressure drop of the refrigerant in the flow channel in the process of converting liquid into gas is changed, the heat exchange efficiency is improved, and on the other hand, the resistance of the refrigerant in the flow channel flowing process is reduced.
The cooling plate 1 may be provided at the side and/or bottom of the battery pack. The cooling plate 1 may be further provided at the tab position of the battery pack.
In some examples, the flow area of the first cooling flow passage 10 gradually increases from the first liquid inlet 11 to the first liquid outlet 12 to form a gradual flow passage.
In other examples, the first cooling flow passage 10 includes a first gradual transition and/or a first abrupt transition.
According to the invention, the first cooling flow channel 10 adopts a mode of gradually changing the cross section area along the flowing direction of the refrigerant, or adopts modes of suddenly changing the cross section area, gradually changing, combining suddenly changing and the like, so that the pressure drop of the refrigerant in the flow channel in the process of converting liquid into gas can be changed, the heat exchange efficiency is improved, and the resistance of the refrigerant in the flow channel flowing process is reduced.
In some embodiments, a plurality of first ribs extending along the length direction of the cooling plate 1 are formed in the cooling plate 1, and a gap between every two adjacent first ribs forms the first cooling flow channel 10; alternatively, a plurality of first flow holes extending in the longitudinal direction thereof are formed in the cooling plate, and each of the flow holes forms the first cooling flow passage 10. The cross-sectional shape of the first cooling flow passage 10 may be flat, circular, elliptical, polygonal, triangular, irregular, or other shapes.
In some embodiments, a plurality of the first cooling flow channels 10 are arranged spaced apart from each other; the cooling device further comprises a first communicating pipe 13, the plurality of first liquid inlets 11 are communicated with the first communicating pipe 13, and the first communicating pipe 13 is used for circulating and gathering a refrigerant and shunting the refrigerant to the plurality of first liquid inlets 11. In the flowing direction of the refrigerant in the first communication pipe 13, the liquid inlet area of the first liquid inlet 11 which is closer to the upstream of the plurality of first liquid inlets 11 is larger.
Further, the cooling device further includes a third communication pipe 14, and the plurality of first liquid outlets 12 are all communicated with the third communication pipe 14, and as a collecting pipe, the refrigerant flowing out from the plurality of first liquid outlets 12 is collected to the third communication pipe 14 and flows out.
For example, as shown in fig. 2 and fig. 4, a plurality of the first cooling channels 10 may extend transversely and be arranged at intervals longitudinally, it can be understood that a plurality of the first liquid inlets 11 are arranged at intervals longitudinally, the liquid inlet areas of the plurality of liquid inlets 1 increase gradually from bottom to top, the first communication pipe 13 may be arranged longitudinally, the refrigerant is divided by the channels in the first communication pipe 13 through the plurality of first liquid inlets 11, the fluid pressure of the first liquid inlet 11 below (downstream) is large, and the fluid pressure of the first liquid inlet above (upstream) is small, so that the liquid inlet area of the first liquid inlet 11 below (downstream) is small, and the liquid inlet area of the first liquid inlet 11 above (upstream) is large, and thus the refrigerant flow rate can be adjusted, and the flow rate distribution uniformity is achieved. Making the battery cooling more uniform.
In some embodiments, the cooling plate 1 further includes second cooling flow channels 20, each of the second cooling flow channels 20 includes a second liquid inlet 21 and a second liquid outlet 22, each of the second cooling flow channels 20 is configured to circulate a cooling medium, the cooling medium flows from the second liquid inlet 21 to the second liquid outlet 22, wherein a flow area of each of the second cooling flow channels 20 is larger as the second cooling flow channel 20 is closer to the second liquid outlet 22 in a flow direction from the second liquid inlet 21 to the second liquid outlet 22; the second liquid inlet 21 is located on the same side as the first liquid outlet 12, and the second liquid outlet 22 is located on the same side as the first liquid inlet 11, so that the flow direction of the refrigerant in the first cooling flow channel 10 is opposite to the flow direction of the refrigerant in the second cooling flow channel 12. The cooling device of the embodiment of the invention can form double cooling channels, and the flow direction of the refrigerant in the first cooling channel 10 is opposite to the flow direction of the refrigerant in the second cooling channel 12, so that the cooling of two sides of the battery is more balanced, and the cooling efficiency is improved.
In some examples, the flow area of the second cooling flow passage 20 gradually increases from the second inlet port 21 to the first outlet port 22 to form a gradual flow passage.
In other examples, the second cooling flow passage 20 includes a first gradual transition and/or a first abrupt transition.
In some embodiments, a plurality of second ribs extending along the length direction of the cooling plate 1 are formed in the cooling plate 1, and the gap between every two adjacent second ribs forms the second cooling flow channel 20; alternatively, a plurality of second flow holes extending in the longitudinal direction thereof are formed in the cooling plate, and each of the flow holes forms the second cooling flow passage 20.
In some embodiments, a plurality of the second cooling flow channels 20 are arranged spaced apart from one another; the cooling device further comprises a second communicating pipe 24, the plurality of second liquid inlets 21 are all communicated with the second communicating pipe 24, the second communicating pipe 24 is used for circulating a refrigerant, and in the circulating direction of the refrigerant in the second communicating pipe 24, the liquid inlet area of the second liquid inlets 21 which are closer to the upstream in the plurality of second liquid inlets 21 is larger.
Further, the cooling device further includes a fourth communication pipe 23, and the plurality of second liquid outlets 22 are all communicated with the fourth communication pipe 23, and converge the refrigerant flowing out from the plurality of second liquid outlets 22 to the fourth communication pipe 23 to flow out as a collecting pipe.
For example, as shown in fig. 2 and fig. 4, the plurality of second cooling flow channels 20 may extend transversely and are arranged at longitudinal intervals, it can be understood that the plurality of second liquid inlets 21 are arranged at longitudinal intervals, the liquid inlet area of the plurality of second liquid inlets 21 is gradually increased from top to bottom, the second communicating pipe 24 may be arranged longitudinally, the refrigerant flows into the second communicating pipe 24 from the lower part to the upper part and is divided by the plurality of second liquid inlets 21, the fluid pressure of the second liquid inlet 21 at the lower part (downstream) is small, and the fluid pressure at the upper part (upstream) is large, so that the liquid inlet area of the first liquid inlet 21 at the lower part (downstream) is small, and the liquid inlet area of the second liquid inlet 21 at the upper part (upstream) is small, thereby adjusting the flow rate of the refrigerant and making the flow rate distribution uniform. Making the battery cooling more uniform.
In some embodiments, the cooling plates 1 are provided with two cooling plates, including a first cooling plate and a second cooling plate, the first cooling plate and the second cooling plate are disposed opposite to each other, wherein the first liquid inlet of the first cooling channel of the first cooling plate is communicated with the first liquid inlet of the first cooling channel of the second cooling plate through a first liquid inlet pipe 15, the first liquid outlet of the first cooling channel of the first cooling plate is communicated with the first liquid outlet of the first cooling channel of the second cooling plate through a first liquid outlet pipe 16,
and a second liquid inlet of the second cooling runner of the second cooling plate is communicated with a second liquid inlet of the second cooling runner of the second cooling plate through a second liquid inlet pipe 25, and a second liquid outlet of the second cooling runner of the second cooling plate is communicated with a second liquid outlet of the second cooling runner of the second cooling plate through a second liquid outlet pipe 26.
The present invention also provides a battery module, including: the battery pack 2 and the cooling device according to any of the above embodiments, the cooling plate 1 of the cooling device is disposed on at least one side surface and/or bottom surface of the battery pack 2.
In some embodiments, the battery module further includes: the fixing structure comprises a positioning plate 31 and a fixing belt 32, wherein the positioning plate 31 is respectively arranged at two ends of the battery pack 2, the fixing belt 32 is connected with the positioning plate 31 and bound around the battery pack 2, and the positioning plate 31 is supported on the cooling plate. According to the battery module, the cooling plate 1 is used for cooling the battery pack 2 and providing a supporting and fixing function, so that the battery pack is protected while the battery pack is efficiently cooled.
In some embodiments, the fixation structure further comprises: the locking assembly 33, the locking assembly 33 includes a supporting plate 331 and a locking plate 332, the supporting plate 331 is disposed on the positioning plate 31 and supported on the upper and lower surfaces of the cooling plate 1, and the locking plate 332 is detachably connected to the supporting plate 331 respectively and is located on the side surface of the cooling plate 1.
In some embodiments, as shown in fig. 6, a temperature sensor may be further disposed inside the battery module, the temperature sensor transmits a detected battery temperature signal to the battery thermal management system, and the battery thermal management system starts the refrigeration system for direct cooling through a comparison result between an actual measured value T0 and a set value T1 if the actual measured value of the temperature is greater than the set value, and does not need to cool the battery and keeps the refrigeration system off if the actual measured value of the temperature is less than the set value.
The specific operation conditions of the direct cooling system are as follows: the temperature sensor arranged in the battery module receives the temperature signal of the battery in real time and transmits the temperature signal to the battery thermal management system, and when the measured value of the battery temperature at a certain moment is greater than the set value of the temperature, the refrigeration system for directly cooling the battery is started. The coolant enters the first liquid inlet pipe 15 and the second liquid inlet pipe 26 from coolant inlets on two sides of the battery pack 2, enters the first communicating pipe 13 (the first collecting pipe) and the second communicating pipe 24 (the second collecting pipe), then flows into the first cooling flow channel 10 and the second cooling flow channel 20 through the first liquid inlet 11 and the second liquid inlet 221 respectively, flows in the flow channels, takes away heat of the battery pack, and cools the battery pack, wherein the flowing directions of the coolant in the first cooling flow channel 10 and the second cooling flow channel 20 are shown by arrows in fig. 1, the coolant flows in two opposite directions simultaneously, and the coolant flows into the first cooling flow channel 10 and the second cooling flow channel 20 in two directions. Then, refrigerants in the two flow channels flow out of the flat pipe 4 through the refrigerant outlet holes 12 on the two sides of the flat pipe, enter the refrigerant outlet flow collecting section 20, flow out through the first liquid outlet pipe 16 and the second liquid outlet pipe 25 on the two sides, battery heat brought out by the refrigerants is exchanged in the refrigerating system, and then the refrigerants enter the refrigerant inlet to cool the battery module. When the battery thermal management system receives a temperature signal from a temperature sensor in the battery module at a certain moment, and finds that the measured value of the battery temperature is smaller than the set value of the temperature, the temperature of the battery module is recovered to be normal, cooling is not needed, the refrigeration system for directly cooling the battery stops running, and cooling is finished.
It is further understood that the use of "a plurality" in this disclosure means two or more, as other terms are analogous. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," etc. are used interchangeably throughout. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.
It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.

Claims (12)

1. A cooling apparatus, comprising:
the cooling plate comprises a plurality of first cooling flow channels, each first cooling flow channel comprises a first liquid inlet and a first liquid outlet, the first cooling flow channels are used for circulating a refrigerant, the refrigerant flows from the first liquid inlet to the first liquid outlet, and the flow area of each first cooling flow channel is increased along the refrigerant flowing direction from the first liquid inlet to the first liquid outlet.
2. The cooling device according to claim 1,
the first cooling flow passages are arranged at intervals;
the cooling device further comprises a first communicating pipe, the first liquid inlet is communicated with the first communicating pipe, the first communicating pipe is used for circulating a refrigerant, and the refrigerant is in the circulating direction of the first communicating pipe and is in a plurality of positions, close to the upstream, in the first liquid inlet, larger liquid inlet areas of the first liquid inlet are.
3. The cooling device according to claim 1 or 2,
the cooling plate further comprises second cooling flow channels, each second cooling flow channel comprises a second liquid inlet and a second liquid outlet, the second cooling flow channels are used for circulating a refrigerant, the refrigerant flows from the second liquid inlet to the second liquid outlet, and the flow area of each second cooling flow channel is increased in the flow direction from the second liquid inlet to the second liquid outlet;
the second liquid inlet is arranged on the same side as the first liquid outlet, and the second liquid outlet is arranged on the same side as the first liquid inlet, so that the flow direction of the refrigerant in the first cooling flow channel is opposite to the flow direction of the refrigerant in the second cooling flow channel.
4. The cooling device according to claim 3,
a plurality of the second cooling channels are arranged at intervals;
the cooling device further comprises a second communicating pipe, the plurality of second liquid inlets are communicated with the second communicating pipe, the second communicating pipe is used for circulating a refrigerant, and in the circulating direction of the refrigerant in the second communicating pipe, the liquid inlet area of the second liquid inlets, which is closer to the upstream, is larger.
5. The cooling device according to claim 3,
the flow area of the first cooling flow channel is gradually increased from the first liquid inlet to the first liquid outlet to form a gradual change type flow channel;
and/or the presence of a gas in the gas,
the flow area of the second cooling flow channel gradually increases from the second liquid inlet to the second liquid outlet to form a gradual flow channel.
6. The cooling device according to claim 3,
the first cooling flow passage comprises a first gradual transition and/or a first abrupt transition;
and/or the presence of a gas in the gas,
the second cooling flow passage includes a second transition and/or a second abrupt transition.
7. The cooling device according to claim 1,
a plurality of first convex ribs extending along the length direction of the cooling plate are formed in the cooling plate, and a first cooling flow channel is formed in a gap between every two adjacent first convex ribs; alternatively, a plurality of first flow through holes extending in the longitudinal direction of the cooling plate are formed in the cooling plate, and each of the flow through holes forms the first cooling flow channel.
8. The cooling device according to claim 3,
a plurality of second convex ribs extending along the length direction of the cooling plate are formed in the cooling plate, and a second cooling flow channel is formed in a gap between every two adjacent second convex ribs; or, a plurality of second flow through holes extending along the length direction of the cooling plate are formed in the cooling plate, and each flow through hole forms the second cooling flow channel.
9. The cooling device according to claim 3,
the number of the cooling plates is two, the two cooling plates comprise a first cooling plate and a second cooling plate, the first cooling plate and the second cooling plate are arranged oppositely,
wherein, the first liquid inlet of the first cooling flow channel of the first cooling plate is communicated with the first liquid inlet of the first cooling flow channel of the second cooling plate through a first liquid inlet pipe, the first liquid outlet of the first cooling flow channel of the first cooling plate is communicated with the first liquid outlet of the first cooling flow channel of the second cooling plate through a first liquid outlet pipe,
and a second liquid inlet of a second cooling runner of the second cooling plate is communicated with a second liquid inlet of a second cooling runner of the second cooling plate through a second liquid inlet pipe, and a second liquid outlet of the second cooling runner of the second cooling plate is communicated with a second liquid outlet of the second cooling runner of the second cooling plate through a second liquid outlet pipe.
10. A battery module, comprising:
a battery pack;
the cooling device according to any one of claims 1 to 9, a cooling plate of the cooling device being located on at least one side surface and/or a bottom surface of the battery pack.
11. The battery module according to claim 10, further comprising:
the fixing structure comprises a positioning plate and a fixing band, the positioning plate is arranged at two ends of the battery pack respectively, the fixing band is connected with the positioning plate and bound around the battery pack, and the positioning plate is supported on the cooling plate.
12. The battery module according to claim 11, wherein the fixing structure further comprises: the locking assembly comprises a locking assembly supporting plate and locking plates, the supporting plate is arranged on the positioning plate and supported on the upper surface and the lower surface of the cooling plate, and the locking plates are detachably connected with the supporting plate respectively and are positioned on the side surfaces of the cooling plate.
CN202211216172.3A 2022-09-30 2022-09-30 Cooling device and battery module Pending CN115498327A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116231148A (en) * 2023-01-06 2023-06-06 小米汽车科技有限公司 Liquid cooling plate assembly, cooling system, battery pack and vehicle
WO2024152544A1 (en) * 2023-01-17 2024-07-25 厦门海辰储能科技股份有限公司 Energy storage unit and energy storage system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116231148A (en) * 2023-01-06 2023-06-06 小米汽车科技有限公司 Liquid cooling plate assembly, cooling system, battery pack and vehicle
CN116231148B (en) * 2023-01-06 2024-05-28 小米汽车科技有限公司 Liquid cooling plate assembly, cooling system, battery pack and vehicle
WO2024152544A1 (en) * 2023-01-17 2024-07-25 厦门海辰储能科技股份有限公司 Energy storage unit and energy storage system

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