CN118899587B - Battery pack and battery pack - Google Patents
Battery pack and battery pack Download PDFInfo
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- CN118899587B CN118899587B CN202411398933.0A CN202411398933A CN118899587B CN 118899587 B CN118899587 B CN 118899587B CN 202411398933 A CN202411398933 A CN 202411398933A CN 118899587 B CN118899587 B CN 118899587B
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/643—Cylindrical 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
-
- 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
- H01M10/65—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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the technical field of new energy batteries, and provides a battery assembly and a battery pack, wherein the battery assembly comprises a plurality of cylindrical batteries, a first cold plate and second cold plates, wherein the cylindrical batteries comprise peripheral surfaces and end surfaces, the second cold plates are perpendicular to the first cold plates, the second cold plates are arranged on two sides of the first cold plates, a plurality of arc-shaped concave parts are arranged on two surfaces of the second cold plates at intervals, the cylindrical batteries are arranged on the second cold plates, the peripheral surfaces are matched with the arc-shaped concave parts, the end surfaces are matched with the first cold plates, a first medium flow passage is arranged in the first cold plates, a second medium flow passage is arranged in the second cold plates, a liquid collecting pipe is used for communicating the second medium flow passages of the two second cold plates, and a liquid inlet and a liquid outlet are respectively arranged on the two second cold plates. The first cold plate cools the end face of the cylindrical battery, and the second cold plate cools the peripheral face of the cylindrical battery, so that heat dissipation of the cylindrical battery in the axial direction and the radial direction is guaranteed.
Description
Technical Field
The invention relates to the technical field of new energy batteries, in particular to a battery assembly and a battery pack.
Background
The battery pack is a core component of the new energy automobile, wherein the batteries in the battery pack comprise square batteries, cylindrical batteries, blade batteries and the like. Since the circumferential surface of the cylindrical battery is an arc surface, a serpentine cold plate is generally used to cool the cylindrical battery. However, the serpentine cold plate can only cool the peripheral surface of the cylindrical battery, but cannot achieve a good heat dissipation effect on the axial direction of the cylindrical battery, so that the overall heat dissipation effect of the cylindrical battery is poor.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that the heat dissipation effect of the serpentine cold plate on the cylindrical battery in the prior art is poor, and further provides a battery assembly and a battery pack.
In order to solve the problems, the invention provides a battery assembly, which comprises a plurality of cylindrical batteries, a first cold plate and a second cold plate, wherein the cylindrical batteries comprise a peripheral surface and an end surface, the plate surfaces of the second cold plates are perpendicular to the plate surfaces of the first cold plates, the second cold plates are arranged on two sides of the first cold plates, the large surface of the first cold plates are opposite to the end surfaces of the cylindrical batteries and are in heat exchange arrangement, the large surface of the second cold plates are opposite to the peripheral surface of the cylindrical batteries and are in heat exchange arrangement, the cylindrical batteries on one surface of the second cold plates form the cylindrical battery assembly, a first medium flow channel is arranged in the first cold plate, a second medium flow channel is arranged in the second cold plates, a liquid collecting pipe is used for communicating the second medium flow channels of the two second cold plates, the liquid collecting pipe is arranged at one end of the length direction of the second cold plates, and is connected with two end parts of the same side of the two second cold plates, a liquid inlet and a liquid outlet are respectively arranged on the two second cold plates, the liquid collecting pipe is arranged at one end of the length direction of the second cold plates, the liquid inlet and the liquid outlet is arranged at the other end of the second cold plates, the liquid outlet is arranged at the other end of the length direction of the second cold plates, the liquid inlet and the liquid outlet is arranged at the other end of the second cold plate is parallel to the length of the cylindrical battery, which is in the axial direction of the second cold plate, and is parallel to the length of the second battery 23, and is perpendicular to the length of the axial direction of the second battery 23.
The invention has the following advantages:
According to the technical scheme, the battery assembly cools the cylindrical battery in a mode of combining the first cold plate and the second cold plate. The first cold plate cools the end face of the cylindrical battery, and the second cold plate cools the peripheral face of the cylindrical battery, so that heat dissipation of the cylindrical battery in the axial direction and the radial direction is guaranteed. Through optimizing the relation of the length and the width of the second cold plates, the temperature difference between the liquid inlet and the liquid outlet of the heat exchange medium can be reduced, so that the heat exchange effect on the two second cold plates is ensured, and the condition of uneven heat exchange of the cylindrical battery is reduced. Therefore, the technical scheme of the invention solves the defect that the heat dissipation effect of the serpentine cold plate on the cylindrical battery in the prior art is poor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structure of a battery assembly of the present invention;
Fig. 2 shows a schematic view of a bottom view of a first cold plate and a second cold plate of the battery assembly of fig. 1;
FIG. 3 shows a schematic view of the high voltage crossover row of the battery assembly of FIG. 1;
FIG. 4 is a schematic diagram showing the structure of a second medium flow passage of a second cold plate of the battery assembly of FIG. 1;
fig. 5 shows an enlarged schematic view at the branching channel in fig. 4;
FIG. 6 shows a schematic view of a first media flow path of a first cold plate of the battery assembly of FIG. 1;
fig. 7 is a schematic side view showing the structure of a first cold plate of the battery assembly of fig. 1.
Reference numerals illustrate:
10. the cylindrical battery, 20, the first cold plate, 21, the first medium runner, 211, the inflow runner, 212, the outflow runner, 30, the second cold plate, 31, the arc-shaped concave part, 32, the second medium runner, 321, the branch runner, 40, the liquid collecting pipe, 50, the liquid inlet, 60, the liquid outlet, 70, the high-voltage bridging row, S1, the first area, S2 and the second area.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 to 7, an embodiment of a battery assembly according to the present application includes a plurality of cylindrical batteries 10, a first cold plate 20, a second cold plate 30, a liquid collecting pipe 40, a liquid inlet 50, and a liquid outlet 60. Wherein the cylindrical battery 10 includes a peripheral surface and an end surface. The plate surface of the second cold plate 30 is perpendicular to the plate surface of the first cold plate 20, and both sides of the first cold plate 20 are provided with the second cold plate 30. The cylindrical battery 10 is disposed on the second cold plate 30, the large face of the first cold plate 20 is disposed opposite to the end face of the cylindrical battery and heat-exchanging, the large face of the second cold plate 30 is disposed opposite to the peripheral face of the cylindrical battery and heat-exchanging, and the plurality of cylindrical batteries 10 on one face of the second cold plate 30 form a cylindrical battery pack.
Further, a first medium flow channel 21 is provided in the first cold plate 20, and a second medium flow channel 32 is provided in the second cold plate 30. The header 40 is used to communicate the second medium flow channels 32 of the two second cold plates 30, and the header 40 is located at one end of the second cold plates 30 in the length direction. The liquid inlet 50 and the liquid outlet 60 are respectively arranged on the two second cold plates 30, and the liquid collecting tube 40 is positioned at one end of the second cold plates 30 in the length direction, and the liquid inlet 50 and the liquid outlet 60 are positioned at the other end of the second cold plates 30 in the length direction.
Further, the ratio of the length of the second cold plate 30 perpendicular to the axial direction of the cylindrical battery 10 to the width of the second cold plate 30 parallel to the axis of the cylindrical battery 10 is in the range of 4 to 23.
In the technical solution of the present embodiment, the battery assembly cools the cylindrical battery 10 by combining the first cold plate 20 and the second cold plate 30. The first cooling plate 20 cools the end face of the cylindrical battery 10, and the second cooling plate 30 cools the peripheral face of the cylindrical battery 10, thereby ensuring heat dissipation of the cylindrical battery 10 in the axial direction and the radial direction. By optimizing the relationship between the length and the width of the second cold plates 30, the temperature difference between the liquid inlet 50 and the liquid outlet 60 of the heat exchange medium can be reduced, so that the heat exchange effect on the two second cold plates 30 is ensured, and the uneven heat exchange condition of the cylindrical battery 10 is reduced. Therefore, the technical scheme of the embodiment solves the defect that the heat dissipation effect of the serpentine cold plate on the cylindrical battery in the prior art is poor.
As shown in fig. 1, fig. 1 shows two sets of battery modules arranged in parallel. As will be appreciated by those skilled in the art in connection with fig. 1, the cylindrical battery 10 is placed on the battery pack located on the right side, and the cylindrical battery 10 is not placed on the battery pack located on the left side in order to better show the specific structures of the first and second cold plates 20 and 30.
In the present embodiment, the cylindrical battery 10 has a cylindrical structure including a peripheral surface and two end surfaces, and the shape of the cylindrical battery 10 is circular.
As shown in fig. 2, the first cold plate 20 and the second cold plate 30 are each of a thin plate structure, that is, both have large faces. The first cold plate 20 is arranged in a vertical direction, i.e. the large face of the first cold plate 20 faces in a horizontal direction, the first cold plate 20 having a height and a length. The second cold plate 30 is disposed in a horizontal direction, i.e., a large surface of the second cold plate 30 faces a vertical direction, the second cold plate 30 has a length direction and a width direction, and both sides of the first cold plate 20 are provided with the second cold plates 30, so that one first cold plate 20 and two second cold plates 30 form a structure similar to a "ten". That is, the plate surface of the first cold plate 20 and the plate surface of the second cold plate 30 are disposed vertically.
As can be seen in connection with fig. 2, the second cold plate 30 has a wavy cross section, i.e. a plurality of spaced arc-shaped recesses 31 are formed in both the upper and lower large surfaces of the second cold plate 30, the arc-shaped recesses 31 extending along the length direction of the first cold plate 20.
As can be seen from fig. 1, the cylindrical battery 10 is laid on the second cold plate 30, and the axis of the cylindrical battery 10 extends along the width direction of the second cold plate 30, that is, the circumferential surface of the cylindrical battery 10 is heat-exchanged to be disposed on the arc-shaped recess 31. The end face of the cylindrical battery 10 is arranged in heat exchange with the large face of the first cold plate 20. That is, the first cold plate 20 exchanges heat with the end face of the cylindrical battery 10, and the second cold plate 30 exchanges heat with the peripheral face of the cylindrical battery 10.
It should be noted that, the "the large surface of the first cold plate 20 is opposite to the end surface of the cylindrical battery and the heat exchange is set" means that the end surface of the cylindrical battery can exchange heat with the large surface of the first cold plate 20, and includes that the end surface of the cylindrical battery is in direct contact or indirect contact with the large surface of the first cold plate 20. In this embodiment, the end face of the cylindrical battery is attached to the large face of the first cold plate 20 by an adhesive (indirect contact).
The "the large surface of the second cooling plate 30 is opposite to the peripheral surface of the cylindrical battery and is disposed for heat exchange" means that the peripheral surface of the cylindrical battery can exchange heat with the large surface of the second cooling plate 30, and includes that the peripheral surface of the cylindrical battery is in direct contact or indirect contact with the large surface of the second cooling plate 30. In this embodiment, the peripheral surface of the cylindrical battery is attached to the large surface of the second cold plate 30 by an adhesive (indirect contact).
Further, one of the two second cold plates 30 is provided with a liquid inlet 50, and the other is provided with a liquid outlet 60, and both the liquid inlet 50 and the liquid outlet 60 are located at one side of the second cold plate 30, i.e. at the left side in fig. 1. The liquid collecting pipe 40 is provided at the other side opposite to the second cold plate 30, i.e., at a right side position in fig. 1. The liquid collecting pipe 40 has a long strip structure and covers the outer sides of the end portions of the two second cold plates 30. The liquid collecting pipe 40 is provided with a flow passage, and the liquid collecting pipe 40 can communicate the second medium flow passages 32 of the two second cold plates 30.
The heat exchange medium thus flows in the two second cold plates 30 in such a way that it enters through the liquid inlet 50, flows into the second medium flow channel 32 of one of the second cold plates 30, flows into the liquid collecting pipe 40-the second medium flow channel 32 of the other second cold plate 30, and flows out from the liquid outlet 60. Those skilled in the art will appreciate that the flow direction of the heat exchange medium is generally in a "U" shaped path.
Further, the flow direction of the heat exchange medium is longer, and heat exchange is continuously performed with the cylindrical battery 10 when the heat exchange medium flows, so that the heat exchange capacity of the heat exchange medium near the liquid inlet 50 is better than that of the heat exchange medium near the liquid outlet 60. Taking the cooling liquid as an example for cooling the cylindrical batteries 10, the temperature of the heat exchange medium near the liquid inlet 50 is lower than the temperature of the heat exchange medium near the liquid outlet 60, so that the heat exchange of a plurality of cylindrical batteries 10 may be unbalanced, and further optimization of the structure is required.
Specifically, the length of the second cooling plate 30 cannot be too long, and if the length of the second cooling plate 30 is too long, the flow distance of the heat exchange medium increases, the upstream-downstream temperature difference of the heat exchange medium increases, and the uneven heat exchange of the plurality of cylindrical batteries 10 is further aggravated.
Further, the width of the second cold plate 30 cannot be too small, and the width of the second cold plate 30 determines the flow area and flow rate of the heat exchange medium in the second medium flow passage 32.
The ratio of the length to the width of the second cold plate 30 cannot be too small, which would result in a shorter length of the second cold plate 30. If the first cooling plate 20 is ensured to be as small as possible, the arrangement direction of the cylindrical batteries 10 needs to be perpendicular to the length direction of the battery pack, so that the number of high-voltage adapters between the cylindrical battery packs can be increased, which is not beneficial to ensuring the reliability of the battery pack.
Alternatively, the ratio of the length and the width of the second cold plate 30 is in the range of 4 to 23.
For example, the ratio of the length and the width of the second cold plate 30 may be selected to be 4, 10, 15, 20 or 23.
It is further preferred that the ratio of the length and the width of the second cold plate 30 is in the range of 4.5 to 11.4.
For example, the ratio of the length and the width of the second cold plate 30 may be selected to be 4.5, 5, 10, 11, or 11.4.
As shown in fig. 3, in the technical solution of this embodiment, the battery assembly further includes a high-voltage jumper row 70, where the high-voltage jumper row 70 is used to connect different cylindrical battery packs, or is used to draw out electric energy of the cylindrical battery packs, and the high-voltage jumper row 70 is disposed on the second cold plate 30 and located on the other side opposite to the liquid inlet 50 and the liquid outlet 60.
That is, the high-pressure crossover row 70 is provided on the second cold plate 30 on the side where the header 40 is provided.
In this embodiment, separate water route and circuit and set up, guarantee battery pack's safety in utilization.
In the technical solution of the present embodiment, the ratio of the width of the first medium flow passage 21 to the width of the liquid collecting pipe 40 is in the range of 0.0003 to 8.
Specifically, if the width of the second medium flow channel 32 and the width of the header 40 are too large, it is explained that the width of the second medium flow channel 32 is large and the width of the header 40 is small, so that the flow resistance of the heat exchange medium at the position of the header 40 is large, and the degree of turbulence is increased. While an increased degree of turbulence is detrimental to the uniformity of the temperature of the heat exchange medium at the inlet 50 and outlet 60. The width of the second medium flow channel 32 and the width of the liquid collecting tube 40 being too small, which means that the width of the second medium flow channel 32 is small and the width of the liquid collecting tube 40 is large, the small width of the second medium flow channel 32 is also not beneficial to reducing the flow resistance of the heat exchange medium.
Alternatively, the ratio of the width of the second medium flow passage 32 to the width of the liquid collecting pipe 40 may be selected to be 0.0003, 0.001, 0.01, 0.1, 1,5, or 8.
It is further preferable that the ratio of the width of the second medium flow passage 32 to the width of the liquid collecting pipe 40 is in the range of 0.025 to 1.
Alternatively, the ratio of the width of the second medium flow passage 32 to the width of the liquid collecting pipe 40 may be selected to be 0.03, 0.04, 0.1, 0.5, 0.7, 0.9, or 1.
In the present embodiment, the width of the liquid collecting pipe 40 is in the range of 3mm to 70 mm.
Alternatively, the width of the header 40 may be selected to be 3mm, 5mm, 10mm, 20mm, 40mm, 60mm, 70mm, or the like.
As shown in fig. 2, in the technical solution of the present embodiment, the width of the second cold plate 30 parallel to the axis of the cylindrical battery 10 is in the range of 70mm to 131 mm.
Alternatively, the width of the second cold plate 30 parallel to the axis of the cylindrical battery 10 may be 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, or 131mm.
It is further preferable that the width of the second cold plate 30 parallel to the axis of the cylindrical battery 10 is in the range of 90mm to 121 mm.
Alternatively, the width of the second cold plate 30 parallel to the axis of the cylindrical battery 10 may be 90mm, 100mm, 110mm, 120mm, or 121mm.
As shown in fig. 4 and 5, in the technical solution of the present embodiment, the widths of the two second cold plates 30 parallel to the axis of the cylindrical battery 10 are the same, the second medium flow path 32 includes a plurality of branch flow paths 321,
Specifically, the branch flow path 321 extends along the longitudinal direction of the second cold plate 30, and the plurality of branch flow paths 321 are arranged in parallel along the width direction of the second cold plate 30.
The width of the second medium flow channel 32 refers to the width of one branch flow channel 321. And when the widths of the plurality of sub-flow channels 321 are different, the width of the second medium flow channel 32 refers to the width value of the sub-flow channel 321 of the minimum width among the plurality of sub-flow channels 321.
In the solution of the present embodiment, the number of the branch channels 321 of the second cold plate 30 connected to the liquid outlet 60 is smaller than the number of the branch channels 321 of the second cold plate 30 connected to the liquid inlet 50.
Specifically, in the case where the widths of the two second cold plates 30 are the same, the smaller the number of the branch flow passages 321, the greater the flow rate of the heat exchange medium, the greater the convective heat exchange capability of the heat exchange medium. Therefore, the number of the branch channels 321 of the second cold plate 30 connected to the liquid outlet 60 is smaller than the number of the branch channels 321 of the second cold plate 30 connected to the liquid inlet 50, so that the convective heat exchange capacity of the heat exchange medium at the liquid outlet 60 is larger than that of the heat exchange medium at the liquid inlet 50 of the inlet plate, and the heat exchange deficiency occurs after the heat exchange medium flows for a certain distance, so that the temperature of each cylindrical battery 10 in the battery pack is more uniform.
In the solution of the present embodiment, the ratio of the number of the branch passages 321 of the second cold plate 30 connected to the liquid outlet 60 to the number of the branch passages 321 of the second cold plate 30 connected to the liquid inlet 50 is in the range of 0.026 to 1.
Alternatively, the ratio may be selected to be 0.026, 0.03, 0.05, 0.1, 0.5, or 1.
It is further preferable that the ratio of the number of the sub-flow channels 321 of the second cold plate 30 connected to the liquid outlet 60 to the number of the sub-flow channels 321 of the second cold plate 30 connected to the liquid inlet 50 is in the range of 0.5 to 0.8.
Alternatively, the ratio may be selected to be 0.5, 0.6, 0.7, or 0.8.
As shown in fig. 6, in the technical solution of the present embodiment, the first medium flow path 21 includes an inflow flow path 211 and an outflow flow path 212, the inflow flow path 211 and the outflow flow path 212 divide the large surface of the first cold plate 20 into a first area S1 and a second area S2, and the projection of the second cold plate 30 on the large surface of the first cold plate 20 is located in the first area S1.
Specifically, the inflow channel 211 and the outflow channel 212 also include a plurality of sub-channels, and the sub-channels are arranged in parallel along the longitudinal direction of the first cold plate 20.
In this embodiment, the side portion of the first cold plate 20 is also provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are located on the same side of the first cold plate 20 as the liquid inlet 50 and the liquid outlet 60 of the second cold plate 30, and the liquid inlet and the liquid outlet of the first cold plate 20 are arranged along the height direction of the first cold plate 20. The liquid inlet of the first cold plate 20 communicates with the inflow channel 211, the liquid outlet of the first cold plate 20 communicates with the outflow channel 212, and the inflow channel 211 and the outflow channel 212 communicate with each other on the other side of the first cold plate 20 (i.e., the side on which the liquid collecting tube 40 is provided).
Further, the above-mentioned inflow channel 211 means that the heat exchange medium enters the inflow channel 211 from the liquid inlet, and flows along the inflow channel 211 in a direction away from the liquid inlet and the liquid outlet of the first cold plate 20. The outflow channel 212 is a channel through which the heat exchange medium can flow from the outflow channel 212 to the liquid outlet and flow along the outflow channel 212 in a direction toward the liquid inlet and the liquid outlet of the first cold plate 20.
That is, the flow paths of the heat exchange medium in the inflow channels 211 and the outflow channels 212 are substantially in a "U" shape.
As can be seen from fig. 7, the large face of the first cold plate 20 forms a first area S1 corresponding to the area of the inflow channel 211, that is, the area located above the dotted line of fig. 7. The large face of the first cold plate 20 forms a second area S2 corresponding to the area of the outflow channel 212, that is, the area located at the lower part of the dotted line in fig. 7.
As described above, the flow path of the heat exchange medium in the first cold plate 20 is also substantially in a "U" shape, and as described above, the heat exchange capacity of the heat exchange medium flowing into the flow path 211 may be higher than the heat exchange capacity of the heat exchange medium flowing out of the flow path 212 in the first cold plate 20.
Therefore, if the second cooling plate 30 is provided at the boundary position between the first region S1 and the second region S2 of the large surface of the first cooling plate 20, the cylindrical battery 10 located above the second cooling plate 30 can only contact the heat exchange medium having high heat exchange capacity, while the cylindrical battery 10 located below the second cooling plate 30 can only contact the heat exchange medium having low heat exchange capacity, and the temperature of the cylindrical battery 10 on the upper and lower sides of the second cooling plate 30 becomes uneven.
In the solution of the present embodiment, therefore, the projection of the second cold plate 30 onto the large surface of the first cold plate 20 is located within the first area S1. The cylindrical batteries 10 positioned above the second cold plate 30 can be contacted with the heat exchange medium with high heat exchange capacity, and the cylindrical batteries 10 positioned below the second cold plate 30 can be contacted with part of the heat exchange medium with high heat exchange capacity, so that the temperatures of the cylindrical batteries 10 in the battery pack are more balanced.
Alternatively, the projected lower edge of the second cold plate 30 on the large face of the first cold plate 20 is at a distance in the range of 0.05mm to 0.5mm from the boundary position of the first region S1 and the second region S2.
For example, the distance may be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.5mm.
It is further preferred that the distance from the boundary position of the first region S1 and the second region S2 at the projected lower edge of the second cold plate 30 on the large surface of the first cold plate 20 is in the range of 0.1mm to 0.3 mm.
For example, the distance may be 0.1mm, 0.2mm, or 0.3mm.
Alternatively, the total cross-sectional area of the flow path of the inflow channel 211 is larger than the total cross-sectional area of the flow path of the outflow channel 212.
As can be seen from fig. 7, the height of the region S1 is slightly larger than the height of the region S2 along the height direction of the first cold plate 20, and thus the total cross-sectional area of the flow path (sum of cross-sectional areas of the respective branch flow paths) of the inflow flow path 211 is larger than the total cross-sectional area of the flow path (sum of cross-sectional areas of the respective branch flow paths) of the outflow flow path 212. The cylindrical batteries 10 positioned above the second cold plate 30 can be contacted with the heat exchange medium with high heat exchange capacity in the inflow channel 211, and the cylindrical batteries 10 positioned below the second cold plate 30 can be contacted with part of the heat exchange medium with high heat exchange capacity in the inflow channel 211, so that the temperatures of the cylindrical batteries 10 in the battery pack are more balanced.
In the technical solution of the present embodiment, on one side of the first cold plate 20, the surface area of the large face of the second cold plate 30, and the dimensions of the cylindrical battery 10 satisfy the following relationship:
(A/(B.times.n))/(C/(D.times.n)) is in the range of 0.013 to 14.8,
Where a is the surface area of the large face of the first cold plate 20, B is the end face area of the cylindrical battery 10, C is the surface area of the large face of the second cold plate 30, D is the circumferential surface area of the cylindrical battery 10, and n is the number of cylindrical batteries 10 on one side of the first cold plate 20.
Where numerator (a/(b×n)) represents the area of the axially cooled first cold plate 20 allocated to each cylindrical battery 10, and denominator (C/(d×n)) represents the area of the radially cooled second cold plate 30 allocated to each cylindrical battery 10.
The above ratio should be within a reasonable range in order to balance the axial heat transfer efficiency and the radial heat transfer efficiency of the cylindrical battery 10, considering that they are different.
Alternatively, the above ratio may be 0.013, 0.02, 0.1, 1, 5, 10, 14 or 14.8.
It is further preferred that the above ratio is in the range of 0.8 to 4.
For example, the ratio may be 0.8, 1, 2, 3, or 4.
The application also provides a battery pack, which comprises a box body and a battery assembly arranged in the box body, wherein the battery assembly is the battery assembly, the box body comprises a bottom plate, the first cold plate is vertically arranged with the bottom plate, and the second cold plate is parallel to the bottom plate.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411663194.3A CN119297481A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
| CN202411663187.3A CN119297480A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
| CN202411398933.0A CN118899587B (en) | 2024-10-09 | 2024-10-09 | Battery pack and battery pack |
| DE202025104932.5U DE202025104932U1 (en) | 2024-10-09 | 2025-08-21 | Battery arrangement and battery pack |
| DE202025105921.5U DE202025105921U1 (en) | 2024-10-09 | 2025-09-30 | Battery assembly and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411398933.0A CN118899587B (en) | 2024-10-09 | 2024-10-09 | Battery pack and battery pack |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411663187.3A Division CN119297480A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
| CN202411663194.3A Division CN119297481A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
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| CN118899587A CN118899587A (en) | 2024-11-05 |
| CN118899587B true CN118899587B (en) | 2024-12-20 |
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| CN202411663187.3A Pending CN119297480A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
| CN202411663194.3A Pending CN119297481A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
| CN202411398933.0A Active CN118899587B (en) | 2024-10-09 | 2024-10-09 | Battery pack and battery pack |
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| CN202411663187.3A Pending CN119297480A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
| CN202411663194.3A Pending CN119297481A (en) | 2024-10-09 | 2024-10-09 | Battery components and battery packs |
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| DE (2) | DE202025104932U1 (en) |
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|---|---|---|---|---|
| CN217691328U (en) * | 2022-04-20 | 2022-10-28 | 欣旺达电动汽车电池有限公司 | Battery pack |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5795648B2 (en) * | 2011-12-09 | 2015-10-14 | 本田技研工業株式会社 | Battery cooling structure |
| EP3228163A1 (en) * | 2014-10-27 | 2017-10-11 | Ebullient, LLC | Flexible two-phase cooling system |
| KR102911786B1 (en) * | 2019-12-20 | 2026-01-14 | 삼성전자주식회사 | Cooling structure and battery system comprising the same |
| CN218101432U (en) * | 2022-07-29 | 2022-12-20 | 厦门海辰储能科技股份有限公司 | Liquid cooling board and battery package |
| CN115051075B (en) * | 2022-08-12 | 2022-10-25 | 楚能新能源股份有限公司 | Battery module of integrated liquid cooling plate subassembly |
| CN115498327B (en) * | 2022-09-30 | 2025-07-04 | 珠海格力电器股份有限公司 | A cooling device and a battery module |
| CN218896699U (en) * | 2022-12-21 | 2023-04-21 | 蜂巢能源科技(无锡)有限公司 | Battery |
| CN219497914U (en) * | 2023-04-07 | 2023-08-08 | 比亚迪股份有限公司 | battery pack |
| CN116914322B (en) * | 2023-09-13 | 2024-01-09 | 比亚迪股份有限公司 | Cooling system, battery pack case, battery pack, and vehicle |
| CN221150140U (en) * | 2023-10-24 | 2024-06-14 | 中创新航科技集团股份有限公司 | Battery device |
| JP7588740B1 (en) * | 2023-10-25 | 2024-11-22 | 晶科▲儲▼能科技有限公司 | Liquid cooling plate and battery pack |
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- 2024-10-09 CN CN202411663187.3A patent/CN119297480A/en active Pending
- 2024-10-09 CN CN202411663194.3A patent/CN119297481A/en active Pending
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| CN217691328U (en) * | 2022-04-20 | 2022-10-28 | 欣旺达电动汽车电池有限公司 | Battery pack |
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| Publication number | Publication date |
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| DE202025104932U1 (en) | 2025-09-11 |
| DE202025105921U1 (en) | 2025-10-27 |
| CN119297481A (en) | 2025-01-10 |
| CN119297480A (en) | 2025-01-10 |
| CN118899587A (en) | 2024-11-05 |
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