CN118156664A - Liquid cooling plate, liquid cooling system and battery pack - Google Patents

Liquid cooling plate, liquid cooling system and battery pack Download PDF

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Publication number
CN118156664A
CN118156664A CN202211528462.1A CN202211528462A CN118156664A CN 118156664 A CN118156664 A CN 118156664A CN 202211528462 A CN202211528462 A CN 202211528462A CN 118156664 A CN118156664 A CN 118156664A
Authority
CN
China
Prior art keywords
liquid cooling
hot
holes
melt
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211528462.1A
Other languages
Chinese (zh)
Inventor
梁树军
朱佰盛
江海昊
卢经纬
蔡伟平
张桃桃
梁润梅
刘含
伍友刚
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.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202211528462.1A priority Critical patent/CN118156664A/en
Priority to PCT/CN2023/132946 priority patent/WO2024114446A1/en
Publication of CN118156664A publication Critical patent/CN118156664A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H01M10/64—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
    • H01M10/655—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
    • 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
    • H01M50/204—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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs

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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)
  • Secondary Cells (AREA)

Abstract

The invention discloses a liquid cooling plate, a liquid cooling system and a battery pack, wherein the liquid cooling plate comprises: the cooling device comprises a plate body, a cooling device and a cooling device, wherein an accommodating cavity for accommodating cooling liquid is formed in the plate body, through holes communicated with the accommodating cavity are formed in the outer surface of the plate body, and the through holes are formed in a plurality of spaced-apart mode; the hot melt pieces are arranged in each through hole and used for blocking the through holes; and the linkage mechanism is arranged in the accommodating cavity, is connected with each hot-melt piece and is configured to be released and drive at least part of the rest hot-melt pieces to open corresponding through holes when at least one hot-melt piece is melted. According to the liquid cooling plate, the linkage mechanism is arranged in the accommodating cavity and is connected with each hot melting piece, and the linkage mechanism is released and drives at least part of the rest hot melting pieces to open corresponding through holes, so that the corresponding through holes are sequentially opened by the linkage mechanism, the outflow speed of cooling liquid in the accommodating cavity is increased, and the cooling effect is improved.

Description

Liquid cooling plate, liquid cooling system and battery pack
Technical Field
The invention relates to the technical field of batteries, in particular to a liquid cooling plate, a liquid cooling system and a battery pack.
Background
In the running process of the battery pack, abnormal conditions such as overcharge, overheat, internal short circuit, extrusion or impact exist in the battery cell, the battery cell is easy to generate thermal runaway or even fire risk under the abnormal conditions, and meanwhile, after a single battery cell fires, the thermal runaway of other battery cell units can be initiated in the battery module, so that the fire or even explosion in a larger range can be initiated.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the liquid cooling plate, and the hot melting piece of the liquid cooling plate is melted to open the corresponding through hole, so that the cooling liquid in the accommodating cavity flows out of the through hole, and rapid cooling is realized.
The invention also provides a liquid cooling system, which comprises the liquid cooling plate.
The invention also provides a battery pack, and the liquid cooling system comprises the liquid cooling system.
According to an embodiment of the present invention, a liquid cooling plate includes: the cooling device comprises a plate body, wherein a containing cavity for containing cooling liquid is formed in the plate body, through holes communicated with the containing cavity are formed in the outer surface of the plate body, and the through holes are formed in a plurality of spaced-apart holes; the hot melt pieces are arranged in each through hole and used for blocking the through holes; and the linkage mechanism is arranged in the accommodating cavity and connected with each hot-melt piece, and is configured to be released and drive at least part of the rest hot-melt pieces to open the corresponding through holes when at least one hot-melt piece melts.
According to the liquid cooling plate provided by the embodiment of the invention, the containing cavity for containing cooling liquid is formed in the plate body, the through holes communicated with the containing cavity are formed in the outer surface of the plate body, the through holes are multiple at intervals, the hot melting piece is arranged in each through hole and used for blocking the through hole, when the temperature of the environment where part of the hot melting pieces are located in the plurality of the hot melting pieces on the liquid cooling plate is gradually increased to be more than or equal to the melting point of the hot melting piece, the part of the hot melting piece is melted, so that the through holes corresponding to the melted hot melting pieces are opened, and the cooling liquid in the containing cavity flows out from the opened through holes, thereby realizing rapid cooling. And the linkage mechanism is arranged in the accommodating cavity and is connected with each hot melting piece, and the linkage mechanism is released to drive at least part of the other at least part of hot melting pieces to open corresponding through holes, so that the corresponding through holes are sequentially opened by the linkage mechanism, the outflow speed of cooling liquid in the accommodating cavity is increased, and the cooling effect is improved.
In some embodiments of the invention, the linkage comprises: the elastic pieces are in one-to-one correspondence with the through holes, the two ends of the length direction of each elastic piece are respectively a first end and a second end, the first ends are connected with the inner wall of the containing cavity, the second ends are connected with the corresponding hot-melt pieces, when the elastic pieces are in a connecting state with the hot-melt pieces and all the hot-melt pieces are located in the through holes, the second ends have a trend of moving towards the direction away from the hot-melt pieces, the elastic pieces are sequentially distributed, and after the second ends of one elastic piece are released, the elastic pieces move towards the next elastic piece and contact with the next elastic piece to drive the corresponding hot-melt pieces to open the corresponding through holes.
In some embodiments of the invention, a plurality of the through holes are spaced apart in a circumferential direction of the plate body, and a plurality of the elastic pieces are spaced apart in the circumferential direction of the plate body.
In some embodiments of the present invention, the first end of each of the elastic pieces is connected to the inner peripheral wall of the accommodating chamber, and when the elastic piece is in a connected state with the hot-melt piece and the hot-melt piece is located in the through hole, an angle between the elastic piece and the inner peripheral wall of the accommodating chamber is 10 ° -50 °, and in a free state, an angle between the elastic piece and the inner peripheral wall of the accommodating chamber is 70 ° -110 °.
In some embodiments of the invention, the linkage further comprises: the second ends of the elastic pieces are connected with the hot melting piece through one steel cable.
In some embodiments of the invention, the spring is a high carbon steel piece.
In some embodiments of the present invention, at least one surface of the thermal fuse in the thickness direction has an annular groove extending in the circumferential direction of the thermal fuse, the annular groove dividing the thermal fuse into a moving part and a fixed part located outside the moving part, and the linkage mechanism is connected to the moving part.
In some embodiments of the present invention, the moving part has a protrusion on a peripheral wall, the fixed part has a notch on an inner peripheral wall, the notch is matched with the protrusion, and the linkage mechanism is connected with the protrusion.
In some embodiments of the invention, the through holes are circular through holes.
In some embodiments of the invention, a plurality of the through holes are arranged on the same surface of the plate body.
In some embodiments of the invention, the hot melt member is an ABS member.
The liquid cooling system comprises the liquid cooling plate.
According to the liquid cooling system provided by the embodiment of the invention, the liquid cooling plate is arranged, the containing cavity for containing cooling liquid is formed in the plate body, the through holes communicated with the containing cavity are formed in the outer surface of the plate body, the through holes are multiple at intervals, the hot melting piece is arranged in each through hole and used for blocking the through hole, when the temperature of the environment where part of the hot melting pieces are located in the plurality of the hot melting pieces on the liquid cooling plate is gradually increased to be more than or equal to the melting point of the hot melting piece, the part of the hot melting piece is melted, so that the through holes corresponding to the melted hot melting pieces are opened, and the cooling liquid in the containing cavity flows out from the opened through holes, thereby realizing rapid cooling. And the linkage mechanism is arranged in the accommodating cavity and is connected with each hot melting piece, and the linkage mechanism is released to drive at least part of the other at least part of hot melting pieces to open corresponding through holes, so that the corresponding through holes are sequentially opened by the linkage mechanism, the outflow speed of cooling liquid in the accommodating cavity is increased, and the cooling effect of the liquid cooling system is improved.
According to an embodiment of the present invention, a battery pack includes: a housing; the battery module is arranged in the shell; the liquid cooling system is characterized in that the liquid cooling plate is arranged in the shell and is attached to the battery module.
According to the battery pack disclosed by the embodiment of the invention, the liquid cooling system is arranged, the liquid cooling plate is arranged in the shell and is attached to the battery module, the containing cavity for containing cooling liquid is formed in the plate, the through holes communicated with the containing cavity are formed in the outer surface of the plate, the through holes are multiple at intervals, the hot melting piece is arranged in each through hole and used for blocking the through hole, and when the battery module works normally, the cooling system is used for cooling the battery module through the cooling liquid flowing in the containing cavity of the liquid cooling plate, so that the heat dissipation of the battery pack is realized. When the abnormal condition occurs to the battery module, the through holes corresponding to the melted hot-melt pieces are opened, the cooling liquid in the accommodating cavity flows out of the opened through holes, so that the cooling of the battery module is realized, the linkage mechanism is arranged in the accommodating cavity and connected with each hot-melt piece, the linkage mechanism is released and drives at least part of the rest hot-melt pieces to open the corresponding through holes, so that the corresponding through holes are sequentially opened by the linkage mechanism, the cooling liquid outflow speed in the accommodating cavity is increased, the cooling effect of the liquid cooling system is improved, the heat spreading speed of the battery module is delayed, the possibility that the flame directly breaks through the shell of the battery pack to explode is reduced, and the safety of the battery pack is improved.
In some embodiments of the invention, further comprising: the baffle assembly is arranged in the shell so as to divide the space in the shell into a plurality of spaced subspaces, the battery module comprises a plurality of submodules, the submodules are respectively arranged in the subspaces, the liquid cooling plates are respectively arranged in the subspaces, and the liquid cooling plates are respectively arranged in the subspaces and are attached to the corresponding submodules.
In some embodiments of the invention, the liquid cooling plate is disposed at a side portion of the sub-module, and the through hole is disposed on a surface of the plate body facing the sub-module.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a structural view of a battery pack according to an embodiment of the present invention;
FIG. 2 is a block diagram of a liquid cooling system according to an embodiment of the invention;
FIG. 3 is an enlarged view of FIG. 2 at F;
fig. 4 is a structural view of a liquid cooling plate according to an embodiment of the present invention;
Fig. 5 is an internal structural view of a liquid cooling plate according to an embodiment of the present invention, in which all through holes are not opened;
FIG. 6 is an enlarged view at A in FIG. 5;
fig. 7 is an internal structural view of a liquid cooling plate according to an embodiment of the present invention, in which one through hole is opened;
FIG. 8 is an enlarged view at B in FIG. 7;
Fig. 9 is an internal structural view of a liquid cooling plate according to an embodiment of the present invention, in which two through holes are opened;
FIG. 10 is an enlarged view at C in FIG. 9;
FIG. 11 is an enlarged view of FIG. 9 at D;
Fig. 12 is an internal structural view of the liquid cooling plate according to the embodiment of the present invention, in which all the through holes are opened;
FIG. 13 is an enlarged view of FIG. 12 at E;
fig. 14 is a block diagram of a sub-module according to an embodiment of the present invention.
Reference numerals:
1000. A battery pack;
100. A liquid cooling system;
1. A liquid cooling plate; 11. a plate body; 111. a through hole; 112. a receiving chamber; 113. a liquid inlet; 114. a liquid outlet; 12. a hot melt member; 12a, a first hot melt; 12b, a second hot melt; 121. an annular groove; 122. a moving part; 1221. a protrusion; 123. a fixing part; 1231. a notch; 134. a cavity; 13. a linkage mechanism; 131. a spring plate; 131a, a first elastic sheet; 131b, a second elastic sheet; 131c, a third spring plate; 1311. a first end; 1312. a second end; 132. a wire rope;
2. A cooling pipe; 21. a connecting pipe; 22. a liquid inlet pipe; 23. a liquid outlet pipe;
200. A housing;
300. A battery module; 301. a sub-module; 3011. a battery cell; 3012. an end plate; 3013. an annular strapping tape;
400. a separator assembly;
500. subspace.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The liquid cooling plate 1 according to the embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 4 to 10, the liquid cooling plate 1 according to one embodiment of the present invention includes a plate body 11, a heat-fusible element 12, and a linkage 13.
Specifically, the plate body 11 has a containing chamber 112 for containing the cooling liquid therein, whereby the liquid cooling plate 1 has a low temperature so that the liquid cooling plate 1 cools the device attached thereto. For example, when the liquid cooling plate 1 is applied to the battery pack 1000, the liquid cooling plate 1 is used for cooling the battery module 300 in the housing 200 of the battery pack 1000 when the battery pack 1000 is in normal operation, and taking away heat emitted by the battery module 300, thereby realizing heat dissipation of the battery module 300 and ensuring performance of the battery pack 1000.
As shown in fig. 4, the outer surface of the plate 11 has a plurality of through holes 111 communicating with the accommodating chambers 112, the through holes 111 are spaced apart, and a heat fusible member 12 is provided in each through hole 111 for blocking the through hole 111. It can be understood that when the temperature of the environment where the liquid cooling plate 1 is located is lower than the melting point of the hot melting piece 12, the hot melting piece 12 seals the through hole 111, and the liquid cooling plate 1 cools the device attached to the hot melting piece; when the temperature of the environment where part of the hot-melt members 12 of the plurality of hot-melt members 12 on the liquid cooling plate 1 is located gradually rises to be equal to or higher than the melting point of the hot-melt members 12, the part of the hot-melt members 12 is melted, so that the through holes 111 corresponding to the melted hot-melt members 12 are opened, and the cooling liquid in the accommodating cavity 112 flows out of the opened through holes 111, thereby realizing rapid cooling of the device attached to the liquid cooling plate 1 and improving the safety of the device using the liquid cooling plate 1.
For example, when the liquid cooling plate 1 is applied to the battery pack 1000, when an abnormal condition occurs in the battery pack 1000, for example, when the battery pack 1000 is out of control, part of the hot melt 12 is melted by the released high-temperature flue gas and other sprayed gas, so that the through holes 111 corresponding to the melted hot melt 12 are opened, the cooling liquid in the accommodating cavity 112 flows out of the opened through holes 111, the battery pack 1000 is rapidly cooled down in a mode of evaporation heat exchange, flow heat transfer and the like, the heat spreading speed of the battery pack 1000 is delayed, the possibility that the flame directly breaks through the shell of the battery pack 1000 to explode is reduced, and the safety of the battery pack 1000 applying the liquid cooling plate 1 is improved.
Further, the number of the liquid cooling plates 1 is plural, each sub-module 301 of the battery module 300 of the battery pack 1000 is attached to at least one liquid cooling plate 1, each cell 3011 of the sub-module 301 is at least in contact with at least one heat melting member 12, therefore, when any cell 3011 is in thermal runaway, the temperature is transferred to the corresponding heat melting member 12 to melt so as to open the through hole 111, and the cooling liquid flows out of the opened through hole 111 onto the corresponding sub-module 301, so that the heat spreading speed of the cell 3011 is delayed, and the safety is further improved.
As shown in fig. 6, the linkage 13 is disposed in the accommodating chamber 112, the linkage 13 is connected to each of the heat-fusible elements 12, and the linkage 13 is configured such that, when at least one of the heat-fusible elements 12 melts, the linkage 13 is released and drives at least part of the remaining at least part of the heat-fusible elements 12 to open the corresponding through holes 111. Thus, when at least one of the heat-fusible members 12 melts, the linkage mechanism 13 is released and drives at least part of the rest of the heat-fusible members 12 to open the corresponding through holes 111, so that at least part of the through holes 111 are sequentially opened, and the cooling liquid flows out of the opened through holes 111, thereby increasing the outflow speed of the cooling liquid in the accommodating cavity 112 and improving the cooling effect.
For example, when the liquid cooling plate 1 is applied to the battery pack 1000, when an abnormal condition occurs in the battery pack 1000, for example, when the battery pack 1000 is out of control, high-temperature smoke is released, so that the temperature in the battery pack 1000 is locally increased, the hot melt pieces 12 in the high-temperature region are melted, at this time, the linkage mechanism 13 is released, at least part of the rest of the hot melt pieces 12 can be driven by the linkage mechanism 13 to sequentially open the corresponding through holes 111, and the cooling liquid flows into the shell 200 of the battery pack 1000 from the opened through holes 111, thereby increasing the outflow speed of the cooling liquid and realizing rapid cooling of the battery pack 1000.
Further, as shown in fig. 1, the housing 200 of the battery pack 1000 is divided into a plurality of sub-spaces 500 by a plurality of partition plate assemblies 400 provided in the housing 200, the plurality of sub-spaces 500 are independent from each other, a plurality of sub-modules 301 constituting the battery module 300 are provided in the plurality of sub-spaces 500, the plurality of liquid cooling plates 1 are provided in the plurality of sub-spaces 500, and the plurality of liquid cooling plates 1 are bonded to the corresponding sub-modules 301. Therefore, when any one of the sub-modules 301 is in thermal runaway, after at least one of the hot-melt members 12 of the liquid cooling plate 1 facing the sub-module 301 is melted by the blast gas such as high-temperature flue gas, the other at least part of the hot-melt members 12 of the liquid cooling plate 1 are driven by the linkage mechanism 13 to sequentially open the corresponding through holes 111, the cooling liquid flows out of the opened through holes 111 onto the sub-modules 301, and each sub-module 301 is respectively arranged in a plurality of sub-spaces 500, so that the cooling liquid only fills the sub-space 500 where the sub-module 301 is in thermal runaway, and does not flow into other sub-spaces 500, thereby realizing rapid soaking of the whole sub-module 301 by the cooling liquid, and realizing rapid cooling without affecting other sub-modules 301.
It should be noted that, except for the first heat-melting element 12 being heated and melted to open the corresponding through hole 111, the other heat-melting elements 12 may be driven by the linkage mechanism 13 to open the corresponding through hole 111 or directly heated and melted to open the corresponding through hole 111.
According to the liquid cooling plate 1 of the embodiment of the invention, the accommodating cavity 112 for accommodating the cooling liquid is formed in the plate body 11, the through holes 111 communicated with the accommodating cavity 112 are formed in the outer surface of the plate body 11, the plurality of through holes 111 are formed at intervals, the hot melt pieces 12 are arranged in each through hole 111 for blocking the through holes 111, when the temperature of the environment where part of the hot melt pieces 12 are located in the plurality of hot melt pieces 12 on the liquid cooling plate 1 is gradually increased to be equal to or higher than the melting point of the hot melt pieces 12, the part of the hot melt pieces 12 are melted, so that the through holes 111 corresponding to the melted hot melt pieces 12 are opened, and the cooling liquid in the accommodating cavity 112 flows out of the opened through holes 111, thereby realizing rapid cooling. And then the linkage mechanism 13 is arranged in the accommodating cavity 112 and is connected with each hot-melt piece 12, the linkage mechanism 13 is released and drives at least part of the other hot-melt pieces 12 to open the corresponding through holes 111, so that the corresponding through holes 111 are sequentially opened by the linkage mechanism 13, the outflow speed of cooling liquid in the accommodating cavity 112 is increased, and the cooling effect is improved.
In some embodiments of the present invention, as shown in fig. 5-9, the linkage 13 includes a plurality of spring plates 131. The plurality of elastic pieces 131 are in one-to-one correspondence with the plurality of through holes 111, two ends of each elastic piece 131 in the length direction are respectively a first end 1311 and a second end 1312, the first end 1311 is connected with the inner wall of the accommodating cavity 112, the second end 1312 is connected with the corresponding hot-melt piece 12, when the elastic pieces 131 are in a connection state with the hot-melt piece 12 and all the hot-melt pieces 12 are located in the through holes 111, the second end 1312 has a trend of moving towards a direction far away from the hot-melt piece 12, the plurality of elastic pieces 131 are sequentially arranged, and after the second end 1312 of one elastic piece 131 is released, the second end 1312 moves towards the next elastic piece 131 and contacts with the next elastic piece 131 to drive the corresponding hot-melt piece 12 to open the corresponding through hole 111.
It will be appreciated that, as shown in fig. 5-8, since the second end 1312 of the elastic piece 131 has a tendency to move away from the heat melting piece 12, the second end 1312 of the first elastic piece 131 (the first elastic piece 131a shown in fig. 8) is released after the first heat melting piece 12 is heated and melted, and the first elastic piece 131 converts elastic potential energy into kinetic energy, so that the second end 1312 of the first elastic piece 131 moves toward the second elastic piece 131 and contacts with the second elastic piece 131 (the second elastic piece 131b shown in fig. 8) to drive the second elastic piece 131 to drive the corresponding heat melting piece 12 to open the corresponding through hole 111.
Meanwhile, as shown in fig. 9 and 10, after the second elastic piece 131 drives the corresponding hot-melt piece 12 to open the corresponding through hole 111, the second end 1312 of the second elastic piece 131 is released, and the second elastic piece 131 converts elastic potential energy into kinetic energy, so that the second end 1312 of the second elastic piece 131 moves towards the third elastic piece 131 (the third elastic piece 131c shown in fig. 10) and contacts with the third elastic piece 131 to drive the corresponding hot-melt piece 12 to open the corresponding through hole 111, and sequentially drive the next elastic piece 131. Until the corresponding through holes 111 are opened by the corresponding hot melt pieces 12 driven one by the plurality of elastic pieces 131 which are sequentially arranged at the back, the linkage triggering of the plurality of elastic pieces 131 is realized, so that the cooling liquid can flow out of the plurality of through holes 111, the flowing-out speed of the cooling liquid in the accommodating cavity 112 is increased, and the cooling effect of the liquid cooling plate 1 is further improved.
In addition, the second end 1312 of one of the elastic pieces 131 is released and then moves towards the next elastic piece 131 and contacts with the next elastic piece 131 to drive the corresponding hot-melt element 12 to open the corresponding through hole 111, which is more reliable than the circuit control. For example, when the liquid cooling plate 1 is applied to the battery pack 1000, in the case that the circuit is burned out due to thermal runaway of the battery pack 1000, the plurality of elastic sheets 131 can still drive the corresponding hot melting pieces 12 one by one to open the corresponding through holes 111, so that the cooling liquid can flow out of the plurality of through holes 111 quickly, and the reliability of the liquid cooling plate 1 is improved.
In some embodiments of the present invention, as shown in fig. 5, 7, 9 and 12, the plurality of through holes 111 are spaced apart in the circumferential direction of the plate body 11, and the plurality of elastic pieces 131 are spaced apart in the circumferential direction of the plate body 11. Therefore, after the second end 1312 of at least one elastic sheet 131 is released by such arrangement, each elastic sheet 131 is driven one by one to drive the corresponding hot-melt member 12 to open the corresponding through hole 111, so that each through hole 111 is opened, the cooling liquid in the accommodating cavity 112 can flow out of each through hole 111, the flowing speed of the cooling liquid is increased, and the cooling effect of the liquid cooling plate 1 is ensured.
For example, as shown in fig. 1, when the liquid cooling plate 1 is applied to the battery pack 1000, the plurality of through holes 111 are formed in the circumferential direction of the plate body 11, and the liquid cooling plate 1 is disposed on the side of the sub-module 301, so that when thermal runaway occurs in any sub-module 301, the plurality of through holes 111 are formed in the circumferential direction of the plate body 11, and the cooling liquid is evacuated from the accommodating chamber 112 through the through hole 111 at the lowest point in the height direction of the sub-module 301 as much as possible, thereby realizing more efficient cooling.
In some embodiments of the present invention, as shown in fig. 6, the first end 1311 of each of the elastic pieces 131 is connected to the inner circumferential wall of the accommodating chamber 112, and the angle between the elastic piece 131 and the inner circumferential wall of the accommodating chamber 112 is 10 ° -50 ° when the elastic piece 131 is connected to the heat-fusible element 12 and the heat-fusible element 12 is located in the through hole 111, and the angle between the elastic piece 131 and the inner circumferential wall of the accommodating chamber 112 is 70 ° -110 ° when the elastic piece 131 is in the free state.
It is understood that, when the elastic piece 131 is in a connected state with the heat-fusible piece 12 and the heat-fusible piece 12 is located in the through hole 111, the angle between the elastic piece 131 and the inner peripheral wall of the accommodating chamber 112 is 10 °, 15 °,20 °, 25 °, 30 °, 35 °, 40 °, or 50 °, and the angle between the elastic piece 131 and the inner peripheral wall of the accommodating chamber 112 in a free state is 70 °, 75 °, 80 °, 85 °, 90 °, 95 °, 100 °, 105 °, or 110 °. Therefore, the linkage triggering between each elastic piece 131 is realized through such angle setting, so that the second end 1312 of one elastic piece 131 moves towards the next elastic piece 131 after being released and contacts with the next elastic piece 131 to drive the corresponding hot melting piece 12 to open the corresponding through hole 111.
Preferably, when the elastic piece 131 is in a connected state with the heat-fusible piece 12 and the heat-fusible piece 12 is located in the through hole 111, an angle between the elastic piece 131 and the inner peripheral wall of the accommodating chamber 112 is 30 °, and the elastic piece 131 is in a free state, an angle between the elastic piece 131 and the inner peripheral wall of the accommodating chamber 112 is 90 °.
In some embodiments of the present invention, as shown in FIG. 6, linkage 13 further includes a plurality of cables 132. Wherein the second end 1312 of each spring 131 is connected to the heat-fusible element 12 by a steel cable 132. Therefore, in the process that the elastic piece 131 is driven to drive the hot-melt piece 12 to open the through hole 111, the driving force received by the elastic piece 131 is transmitted to the hot-melt piece 12 through the steel cable 132 to open the through hole 111, and the arrangement of the steel cable 132 enhances the reliability of the connection of the elastic piece 131 and the hot-melt piece 12 and the force transmission process.
In some embodiments of the present invention, the spring 131 is a high carbon steel member. Because the high-carbon steel is higher in strength and wear resistance after heat treatment and cold drawing hardening, has certain flexibility and plasticity and lower in cost, the elastic pieces 131 are arranged to be high-carbon steel pieces, and the cost of the liquid cooling plate 1 is reduced while the linkage triggering between each elastic piece 131 is met.
In some embodiments of the present invention, as shown in fig. 6 and 10, at least one surface of the thermofusible element 12 in the thickness direction has an annular groove 121 extending in the circumferential direction of the thermofusible element 12, the annular groove 121 dividing the thermofusible element 12 into a moving part 122 and a fixed part 123 located outside the moving part 122, and the link mechanism 13 is connected to the moving part 122.
It will be appreciated that the surface of the heat fusible element 12 facing the accommodating chamber 112 has an annular groove 121 extending in the circumferential direction of the heat fusible element 12, or the surface of the heat fusible element 12 facing away from the accommodating chamber 112 has an annular groove 121 extending in the circumferential direction of the heat fusible element 12, or the surfaces of the heat fusible element 12 facing and facing away from the accommodating chamber 112 each have an annular groove 121 extending in the circumferential direction of the heat fusible element 12. When the temperature of the environment where the liquid cooling plate 1 is located is lower than the melting point of the hot melt 12, the moving part 122 is connected with the fixed part 123, the hot melt 12 seals the through hole 111, and the liquid cooling plate 1 cools the device attached to the hot melt.
When the temperature of the environment where part of the hot-melt elements 12 of the plurality of hot-melt elements 12 on the liquid cooling plate 1 is located gradually rises to be greater than or equal to the melting point of the hot-melt elements 12, the part of the hot-melt elements 12 is melted, so that the linkage mechanism 13 is released and drives the moving part 122 of the rest at least part of the hot-melt elements 12 to be separated from the fixed part 123, thereby realizing that the corresponding through holes 111 are opened by the hot-melt elements 12, and the cooling liquid in the accommodating cavity 112 flows out from the opened through holes 111 to a device attached to the liquid cooling plate 1. Therefore, the connection part between the moving part 122 and the fixed part 123 is weaker due to the arrangement of the annular groove 121, so that the linkage mechanism 13 is convenient to drive the moving part 122 to be separated from the fixed part 123, and the reliability of the liquid cooling plate 1 is improved.
Further, the linkage 13 includes a plurality of elastic pieces 131. The plurality of elastic pieces 131 are in one-to-one correspondence with the plurality of through holes 111, two ends of each elastic piece 131 in the length direction are respectively a first end 1311 and a second end 1312, the first end 1311 is connected with the inner wall of the accommodating cavity 112, the second end 1312 is connected with the moving part 122 of the corresponding hot-melt piece 12, when the elastic pieces 131 are connected with the hot-melt piece 12 and all the hot-melt pieces 12 are located in the through holes 111, the second end 1312 has a trend of moving in a direction from one end of the moving part 122 connected with the elastic pieces 131 to the other end, the plurality of elastic pieces 131 are sequentially arranged, and after the second end 1312 of one elastic piece 131 is released, the second end moves towards the next elastic piece 131 and contacts with the next elastic piece 131 to drive the corresponding moving part 122 to be separated from the fixing part 123, so that the corresponding through holes 111 are opened by the hot-melt piece 12. Thus, the annular groove 121 is disposed so that the second end 1312 drives the moving portion 122 to be separated from the fixed portion 123, so as to open the through hole 111.
In some embodiments of the present invention, as shown in fig. 6 and 10, a protrusion 1221 is provided on a circumferential wall of the moving part 122, a notch 1231 is provided on an inner circumferential wall of the fixed part 123 to be engaged with the protrusion 1221, and the link mechanism 13 is connected to the protrusion 1221. Therefore, when the temperature of the environment where part of the hot-melt pieces 12 of the plurality of hot-melt pieces 12 on the liquid cooling plate 1 is located gradually rises to be greater than or equal to the melting point of the hot-melt piece 12, the part of the hot-melt piece 12 is melted, so that the linkage mechanism 13 is released and the protrusions 1221 of the rest at least part of the hot-melt pieces 12 are driven to be separated from the fixing part 123, thereby driving the moving part 122 to be separated from the fixing part 123, further realizing that the hot-melt pieces 12 open the corresponding through holes 111, so that the cooling liquid in the accommodating cavity 112 flows from the opened through holes 111, and further realizing rapid cooling of the device attached to the liquid cooling plate 1. Meanwhile, the protrusions 1221 are convenient for the linkage mechanism 13 to drive the moving part 122 of the hot melt member 12 to be separated from the fixed part 123 so as to open the corresponding through holes 111, thereby improving the reliability of the liquid cooling plate 1.
Further, as shown, the linkage 13 includes a plurality of spring plates 131 and a plurality of cables 132. The two ends of each elastic piece 131 in the length direction are respectively a first end 1311 and a second end 1312, the first end 1311 is connected with the inner wall of the accommodating cavity 112, the second end 1312 is connected with the protrusion 1221 of the hot-melt member 12 through a steel cable 132, when the elastic pieces 131 are connected with the hot-melt member 12 and all the hot-melt members 12 are located in the through holes 111, the second end 1312 has a trend of moving from the protrusion 1221 of the moving part 122 to a direction far away from one end of the protrusion 1221, the elastic pieces 131 are sequentially arranged, and after the second end 1312 of one elastic piece 131 is released, the second end 1312 moves towards the next elastic piece 131 and contacts with the next elastic piece 131 to drive the corresponding protrusion 1221 to be separated from the fixing part 123, so as to drive the moving part 122 to be separated from the fixing part 123, and further realize that the corresponding through holes 111 are opened by the hot-melt member 12.
In some embodiments of the present invention, as shown in fig. 10, the through hole 111 is a circular through hole. Thus, through holes 111 are conveniently formed in the plate body 11 through the arrangement, the process difficulty and the production cost are reduced, and the production efficiency of the liquid cooling plate 1 is improved. Further, the heat-fusible element 12 has a circular structure, so that the heat-fusible element 12 is convenient to block the through hole 111.
In some embodiments of the present invention, as shown in fig. 4 and 12, a plurality of through holes 111 are provided on the same surface of the plate body 11. Therefore, through the arrangement that the linkage mechanism 13 is released and drives at least part of the rest of the hot melt pieces 12 to open corresponding through holes 111 to be positioned on the same surface, the cooling liquid in the accommodating cavity 112 flows out from the same direction, the flowing-out speed of the cooling liquid is further ensured, and rapid cooling is realized.
In some embodiments of the present invention, the hot melt member 12 is an ABS (Acrylonitrile butadiene Styrene copolymers, acrylonitrile butadiene styrene) member. It can be understood that, since ABS has good comprehensive physical and mechanical properties at normal temperature, and is resistant to abrasion, chemical corrosion and corrosion, the hot-melt member 12 is used for blocking the through hole 111 and is connected with the linkage mechanism 13 when the liquid cooling plate 1 is in normal temperature environment; when the ambient temperature of the liquid cooling plate 1 reaches the melting point of ABS, the hot-melt member 12 is heated to melt and open the corresponding through hole 111, and the linkage drive connected with the hot-melt member is released and drives at least part of the rest of the hot-melt members 12 to open the corresponding through hole 111, so as to ensure the reliability of the liquid cooling plate 1.
For example, when the liquid cooling plate 1 is applied to the battery pack 1000, and the battery pack 1000 is in normal operation, the environment where the liquid cooling plate 1 is located is lower than the melting point of ABS, the hot melt member 12 is used for plugging the through hole 111, and the liquid cooling plate 1 cools the battery pack 1000, so as to realize heat dissipation of the battery pack 1000 and ensure performance of the battery pack 1000. When an abnormal condition occurs in the battery pack 1000, for example, when the battery pack 1000 is in thermal runaway, and the released high-temperature flue gas or other eruption gas reaches the melting point of ABS, the hot-melt member 12 is heated and melted to open the through hole 111, and the cooling liquid in the accommodating cavity 112 flows out of the opened through hole 111, so that the battery pack 1000 is rapidly cooled in the modes of evaporation heat exchange, flowing heat transfer and the like.
The hot-melt member 12 may be made of a hot-melt material having a melting point of about 200 ° and a fixed state at normal temperature.
The liquid cooling system 100 according to the embodiment of the present invention is described below.
As shown in fig. 2, the liquid cooling system 100 according to the embodiment of the present invention includes the liquid cooling plate 1 described above.
According to the liquid cooling system 100 of the embodiment of the invention, the liquid cooling plate 1 is provided, the plate body 11 is internally provided with the containing cavity 112 for containing the cooling liquid, the outer surface of the plate body 11 is provided with the through holes 111 communicated with the containing cavity 112, the through holes 111 are a plurality of spaced apart, each through hole 111 is internally provided with the hot melt piece 12 for blocking the through hole 111, when the temperature of the environment where part of the hot melt pieces 12 in the plurality of the hot melt pieces 12 on the liquid cooling plate 1 is gradually increased to be greater than or equal to the melting point of the hot melt piece 12, the part of the hot melt piece 12 is melted, so that the through holes 111 corresponding to the melted hot melt pieces 12 are opened, and the cooling liquid in the containing cavity 112 flows out from the opened through holes 111, thereby realizing rapid cooling. And then the linkage mechanism 13 is arranged in the accommodating cavity 112 and is connected with each hot-melt piece 12, the linkage mechanism 13 is released and drives at least part of the other hot-melt pieces 12 to open the corresponding through holes 111, so that the corresponding through holes 111 are sequentially opened by the linkage mechanism 13, the outflow speed of cooling liquid in the accommodating cavity 112 is increased, and the cooling effect of the liquid cooling system 100 is improved.
In some embodiments of the present invention, as shown in fig. 3 and 4, the liquid cooling system 100 further includes a cooling pipe 2, where the cooling pipe 2 includes a connecting pipe 21, a liquid inlet 22 and a liquid outlet 23, a liquid inlet 113 and a liquid outlet 114 that are connected to the accommodating cavity 112 are formed on the plate body 11 of each liquid cooling plate 1, the plurality of liquid cooling plates 1 are connected in series through the connecting pipe 21, the liquid inlet 113 of the liquid cooling plate 1 located at the most upstream end is connected with the liquid inlet 22 along the flow direction of the cooling liquid, and the liquid outlet 114 of the liquid cooling plate 1 located at the most downstream end is connected with the liquid outlet 23. Therefore, the cooling liquid enters the liquid cooling system 100 through the liquid inlet pipe 22, sequentially enters the corresponding accommodating cavity 112 through the liquid inlets 113 of each liquid cooling plate 1, flows into the connecting pipeline 21 through the liquid outlets 114 of each liquid cooling plate 1 until the cooling liquid flows out from the liquid outlet 114 of the liquid cooling plate 1 positioned at the most upstream end to the liquid outlet pipe 23, thereby realizing the circulating flow of the cooling liquid in the liquid cooling system 100 and further ensuring the cooling effect of the liquid cooling system 100.
Further, the number of liquid inlets 113 is plural, the number of liquid outlets 114 is plural, and the flow speed of the cooling liquid between the liquid inlet pipe 22 and the liquid cooling plate 1, the liquid cooling plate 1 and the connecting pipeline 21, and the liquid cooling plate 1 and the liquid outlet pipe 23 is ensured by the arrangement of the liquid inlets 113 and the liquid outlets 114, so that the cooling effect of the liquid cooling system 100 is further improved.
The battery pack 1000 according to an embodiment of the present invention is described below.
As shown in fig. 1, a battery pack 1000 according to the liquid cooling system 100 of the embodiment of the present invention includes a housing 200, a battery module 300, and the liquid cooling system 100 described above. The battery module 300 is disposed in the housing 200, and the liquid cooling plate 1 is disposed in the housing 200 and is attached to the battery module 300. It can be understood that, when the battery module 300 works normally, the cooling liquid flowing in the accommodating cavity 112 of the liquid cooling plate 1 takes away the heat of the battery module 300, so that the cooling system 100 cools the battery module 300, and the performance of the battery pack 1000 is ensured. When an abnormal condition occurs in the battery module 300, for example, thermal runaway occurs in the battery pack 1000, part of the hot-melt members 12 are melted by the released high-temperature flue gas and other eruption gas, and when at least one of the hot-melt members 12 is melted, at least part of the rest of the hot-melt members 12 is released and driven to open the corresponding through holes 111 through the linkage mechanism 13, so that the through holes 111 are sequentially opened, and the cooling liquid flows out of the opened through holes 111, thereby increasing the outflow speed of the cooling liquid in the accommodating cavity 112, improving the cooling effect of the liquid cooling system 100, delaying the heat spreading speed of the battery module 300, and further improving the safety of the battery pack 1000.
According to the battery pack 1000 of the embodiment of the invention, the liquid cooling system 100 is arranged, the liquid cooling plate 1 is arranged in the shell 200 and is attached to the battery module 300, the accommodating cavity 112 for accommodating cooling liquid is formed in the plate body 11, the through holes 111 communicated with the accommodating cavity 112 are formed in the outer surface of the plate body 11, the through holes 111 are in a plurality of spaced-apart mode, the hot melting piece 12 is arranged in each through hole 111 and used for sealing the through hole 111, and when the battery module 300 works normally, the cooling of the liquid cooling system 100 to the battery module 300 is realized through the cooling liquid flowing in the accommodating cavity 112 of the liquid cooling plate 1, so that the heat dissipation of the battery pack 1000 is realized. When the battery module 300 is in an abnormal condition, part of the hot melt pieces 12 are melted, so that the through holes 111 corresponding to the melted hot melt pieces 12 are opened, cooling liquid in the accommodating cavity 112 flows out of the opened through holes 111, cooling of the battery module 300 is achieved, the linkage mechanism 13 is arranged in the accommodating cavity 112 and connected with each hot melt piece 12, the linkage mechanism 13 is released and drives at least part of the rest of the hot melt pieces 12 to open the corresponding through holes 111, so that the corresponding through holes 111 are sequentially opened by the linkage mechanism 13, the cooling liquid flowing out speed in the accommodating cavity 112 is increased, the cooling effect of the liquid cooling system 100 is improved, the heat spreading speed of the battery module 300 is delayed, the possibility that flames directly burst through the outer shell of the battery pack 1000 is reduced, and the safety of the battery pack 1000 is improved.
In some embodiments of the present invention, as shown in fig. 14, the battery pack 1000 further includes a separator assembly 400. The battery module 300 includes a plurality of sub-modules 301, the plurality of sub-modules 301 are respectively disposed in the plurality of sub-spaces 500, the plurality of liquid cooling plates 1 are respectively disposed in the plurality of sub-spaces 500 and are attached to the corresponding sub-modules 301, and the plurality of liquid cooling plates 1 are respectively disposed in the plurality of sub-spaces 500.
Thus, when any one of the sub-modules 301 is thermally out of control, and at least one of the hot melt members 12 of the liquid cooling plate 1 facing the sub-module is melted by the high-temperature flue gas or other blown gas, the other at least part of the hot melt members 12 of the liquid cooling plate 1 are driven by the linkage mechanism 13 to sequentially open the corresponding through holes 111, the cooling liquid flows out of the opened through holes 111 onto the sub-modules 301, and each sub-module 301 is arranged in the plurality of sub-spaces 500, so that the cooling liquid only fills the sub-space 500 in which the sub-module 301 is thermally out of control, and does not flow into the other sub-spaces 500, thereby realizing rapid cooling and cooling without affecting the other sub-modules 301.
Further, the sub-module 301 includes a plurality of electric cores 3011, an end plate 3012 and an annular binding belt 3013, the plurality of electric cores 3011 are sequentially arranged along the length direction of the sub-module 301, the end plate 3012 is arranged at one end of the plurality of electric cores 3011 along the length direction of the sub-module 301, and the annular binding belt 3013 circumferentially surrounds the end plate 3012 and the plurality of electric cores 3011 along the sub-module 301, so that the plurality of electric cores 3011 are fixed through the arrangement, and the reliability of the sub-module 301 is improved.
In some embodiments of the present invention, as shown in fig. 1, 2 and 14, the liquid cooling plate 1 is disposed at a side portion of the sub-module 301, and the through hole 111 is disposed on a surface of the plate 11 facing the sub-module 301. Therefore, when the sub-module 301 is out of control, the cooling liquid flows out of the opened through hole 111 and is directly sprayed onto the sub-module 301, so that the speed of evaporation heat exchange, flowing heat transfer and other modes between the cooling liquid and the sub-module 301 is improved, the sub-module 301 is rapidly cooled, the heat spreading speed is reduced, and the reliability of the battery pack 1000 is improved.
The installation position of the liquid cooling plate 1 is not limited to this, and the liquid cooling plate 1 may be provided at the upper or lower portion of the sub-module 301 according to the different requirements of the battery pack 1000.
In some embodiments of the present invention, as shown in fig. 11 and 13, at least part of the heat-melting element 12 has a cavity 134, the cavity 134 is filled with salt powder, the salt powder is CuCl2 or CuSo4, and the heat-melting element 12 having the cavity 134 is opened after the through hole 111 is opened.
It will be appreciated that the number of components,
When an abnormal condition occurs in the battery pack 1000, for example, when the battery pack 1000 is in thermal runaway, high-temperature smoke is released, so that the temperature in the battery pack 1000 is locally increased, the hot-melt parts 12 in a high-temperature area are melted, at the moment, the linkage mechanism 13 is released, at least part of the rest of the hot-melt parts 12 can be driven by the linkage mechanism 13 to sequentially open the corresponding through holes 111, and cooling liquid flows into the shell 200 of the battery pack 1000 from the opened through holes 111, so that the outflow speed of the cooling liquid is increased, and the battery pack 1000 is cooled rapidly. Meanwhile, after the through hole 111 is opened through the hot melt piece 12 with the cavity 134 and the cavity 134, the cavity 134 is opened, so that the cooling liquid is converted into the salt solution, the battery pack 1000 is soaked in the salt solution to slowly release electric energy until the electric quantity is released, the possibility of reburning of the battery pack 1000 is thoroughly blocked, and the safety of the battery pack 1000 further applied with the liquid cooling plate 1 is improved.
In some embodiments of the present invention, as shown in fig. 9, the heat fusible elements 12 having the cavities 134 are plural and are uniformly spaced in the circumferential direction of the plate body 11. Therefore, the plurality of hot-melt pieces 12 with the cavities 134 are uniformly arranged at intervals along the circumferential direction of the plate body 11, so that the hot-melt pieces 12 with the cavities 134 are quickly linked and corresponding through holes 111 are opened, salt powder in the cavities 134 is released and dissolved in cooling liquid, the cooling liquid is converted into salt solution at the initial stage of thermal runaway of the battery pack 1000, and the electric energy of the battery pack 1000 is released, so that the safety is further improved.
Further, as shown in fig. 9 and 11, the plate body 11 is square, the number of the heat-fusible elements 12 having the cavities 134 (the first heat-fusible elements 12a shown in fig. 11) is four and are respectively disposed at four diagonal corners of the liquid cooling plate 1, and the heat-fusible elements 12 having no cavities 134 (the second heat-fusible elements 12b shown in fig. 11) are disposed at uniform intervals along the circumferential direction of the plate body 11. Thus, by such arrangement, the heat-fusible member 12 having the cavity 134 is driven by the link mechanism 13 to open the through hole 111 and the cavity 134, respectively, at the initial stage of thermal runaway of the battery pack 1000, and the processing and production of the liquid cooling plate 1 are facilitated.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. A liquid cooling plate, comprising:
the cooling device comprises a plate body, wherein a containing cavity for containing cooling liquid is formed in the plate body, through holes communicated with the containing cavity are formed in the outer surface of the plate body, and the through holes are formed in a plurality of spaced-apart holes;
The hot melt pieces are arranged in each through hole and used for blocking the through holes;
And the linkage mechanism is arranged in the accommodating cavity and connected with each hot-melt piece, and is configured to be released and drive at least part of the rest hot-melt pieces to open the corresponding through holes when at least one hot-melt piece melts.
2. The liquid cooling plate according to claim 1, wherein the linkage mechanism comprises:
The elastic pieces are in one-to-one correspondence with the through holes, the two ends of the length direction of each elastic piece are respectively a first end and a second end, the first ends are connected with the inner wall of the containing cavity, the second ends are connected with the corresponding hot-melt pieces, when the elastic pieces are in a connecting state with the hot-melt pieces and all the hot-melt pieces are located in the through holes, the second ends have a trend of moving towards the direction away from the hot-melt pieces, the elastic pieces are sequentially distributed, and after the second ends of one elastic piece are released, the elastic pieces move towards the next elastic piece and contact with the next elastic piece to drive the corresponding hot-melt pieces to open the corresponding through holes.
3. The liquid cooling plate according to claim 2, wherein a plurality of the through holes are spaced apart in a circumferential direction of the plate body, and a plurality of the elastic pieces are spaced apart in the circumferential direction of the plate body.
4. The liquid cooling plate according to claim 2, wherein a first end of each of the elastic pieces is connected to an inner peripheral wall of the accommodating chamber, an angle between the elastic piece and the inner peripheral wall of the accommodating chamber is 10 ° to 50 ° when the elastic piece is connected to the hot-melt member and the hot-melt member is located in the through hole, and an angle between the elastic piece and the inner peripheral wall of the accommodating chamber is 70 ° to 110 ° when the elastic piece is in a free state.
5. The liquid cooling plate according to claim 2, wherein the linkage mechanism further comprises:
the second ends of the elastic pieces are connected with the hot melting piece through one steel cable.
6. The liquid cooling plate according to claim 2, wherein the spring plate is a high-carbon steel member.
7. The liquid cooling plate according to claim 1, wherein at least one surface of the heat-fusible member in a thickness direction thereof has an annular groove extending in a circumferential direction of the heat-fusible member, the annular groove dividing the heat-fusible member into a moving portion and a fixed portion located outside the moving portion, the linkage being connected to the moving portion.
8. The liquid cooling plate according to claim 7, wherein the moving portion has a protrusion on a peripheral wall thereof, the fixing portion has a notch on an inner peripheral wall thereof, the notch being engaged with the protrusion, and the link mechanism is connected to the protrusion.
9. The liquid cooling plate according to claim 1, wherein the through holes are circular through holes.
10. The liquid cooling plate according to claim 1, wherein a plurality of the through holes are provided on the same surface of the plate body.
11. The liquid cooling plate according to claim 1, wherein the hot-melt member is an ABS member.
12. A liquid cooling system comprising the liquid cooling plate according to any one of claims 1 to 11.
13. A battery pack, comprising:
A housing;
the battery module is arranged in the shell;
the liquid cooling system according to claim 12, wherein the liquid cooling plate is provided in the case and is attached to the battery module.
14. The battery pack of claim 13, further comprising:
the baffle assembly is arranged in the shell so as to divide the space in the shell into a plurality of spaced subspaces, the battery module comprises a plurality of submodules, the submodules are respectively arranged in the subspaces, the liquid cooling plates are respectively arranged in the subspaces, and the liquid cooling plates are respectively arranged in the subspaces and are attached to the corresponding submodules.
15. The battery pack according to claim 14, wherein the liquid cooling plate is provided at a side portion of the sub-module, and the through hole is provided on a surface of the plate body facing the sub-module.
CN202211528462.1A 2022-11-30 2022-11-30 Liquid cooling plate, liquid cooling system and battery pack Pending CN118156664A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202211528462.1A CN118156664A (en) 2022-11-30 2022-11-30 Liquid cooling plate, liquid cooling system and battery pack
PCT/CN2023/132946 WO2024114446A1 (en) 2022-11-30 2023-11-21 Liquid cooling plate, liquid cooling system, and battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211528462.1A CN118156664A (en) 2022-11-30 2022-11-30 Liquid cooling plate, liquid cooling system and battery pack

Publications (1)

Publication Number Publication Date
CN118156664A true CN118156664A (en) 2024-06-07

Family

ID=91291273

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211528462.1A Pending CN118156664A (en) 2022-11-30 2022-11-30 Liquid cooling plate, liquid cooling system and battery pack

Country Status (1)

Country Link
CN (1) CN118156664A (en)

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