CN115117508A - Lithium ion battery heat abstractor - Google Patents

Lithium ion battery heat abstractor Download PDF

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Publication number
CN115117508A
CN115117508A CN202210761194.1A CN202210761194A CN115117508A CN 115117508 A CN115117508 A CN 115117508A CN 202210761194 A CN202210761194 A CN 202210761194A CN 115117508 A CN115117508 A CN 115117508A
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CN
China
Prior art keywords
pipe
sleeve
arm
heat
cooling water
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
CN202210761194.1A
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Chinese (zh)
Inventor
裴杰
刘明义
林伟杰
宋太纪
郭敬禹
陈志强
李扬
胡明明
陆泽宇
张鹏
景晓华
曹琛
曹曦
曹传钊
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.)
China Huaneng Group Hong Kong Ltd
Huaneng International Engineering Technology Co ltd
Huaneng Clean Energy Research Institute
Original Assignee
China Huaneng Group Hong Kong Ltd
Huaneng International Engineering Technology Co ltd
Huaneng Clean Energy Research Institute
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 China Huaneng Group Hong Kong Ltd, Huaneng International Engineering Technology Co ltd, Huaneng Clean Energy Research Institute filed Critical China Huaneng Group Hong Kong Ltd
Priority to CN202210761194.1A priority Critical patent/CN115117508A/en
Publication of CN115117508A publication Critical patent/CN115117508A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—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
    • H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
    • 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
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention discloses a lithium ion battery heat dissipation device. The refrigerants in the plurality of radiating fins of the radiating device have the same evaporation temperature, the cooling temperature of each square battery is the same, the problem that the cooling temperature of each square battery is different due to the fact that the serpentine cooling pipe scheme is increased along with the temperature of the cooling water is solved, and the temperature consistency among different square batteries is improved. The cooling power of the heat dissipation device can be adaptive to the heating power of the square battery, and the surface temperature of the square battery with high heating power is increased, so that the steam yield in the heat dissipation sheet connected with the square battery is increased, more heat is taken away, and the temperature of the square battery is quickly reduced.

Description

Lithium ion battery heat abstractor
Technical Field
The invention relates to the technical field of energy storage of lithium ion batteries, in particular to a heat dissipation device of a lithium ion battery.
Background
Lithium ion battery energy storage is as main novel energy storage technology, and installed capacity increases rapidly in recent years. In order to improve the cycle performance and times of the lithium ion battery and avoid the problem that the thermal runaway and the like of the lithium ion battery affect the safety of an energy storage system, the lithium ion battery is required to be ensured to be always in a reasonable temperature range in the using process, and the working temperature of the lithium iron phosphate battery is 25-45 ℃. Therefore, the lithium ion battery energy storage system is required to be provided with a thermal management device. The current main lithium ion battery heat management schemes mainly comprise a wind cooling scheme and a liquid cooling scheme. The air cooling scheme has the main problems of large temperature deviation and high energy consumption among different batteries; the liquid cooling scheme can reduce the temperature difference between different batteries and reduce energy consumption.
Current liquid cooling scheme generally adopts the liquid cooling bottom plate, and lithium ion battery places in liquid cooling bottom plate top, and the heat is by last to transmitting to the liquid cooling bottom plate down, has vertical direction heat transfer path length, heat transfer coefficient low, the big scheduling problem of temperature gradient. In addition, since the liquid cooling plate usually adopts a serpentine micro-channel, the flow resistance of the cooling medium is large.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a lithium ion battery heat dissipation device.
The invention provides a lithium ion battery heat dissipation device, which comprises:
the U-shaped cooling water pipe comprises an upper side pipe arm and a lower side pipe arm positioned below the upper side pipe arm, an upper sleeve is sleeved outside the upper side pipe arm, two ends of the upper sleeve are hermetically connected with the outer wall of the upper side pipe arm, a lower sleeve is sleeved outside the lower side pipe arm, two ends of the lower sleeve are hermetically connected with the outer wall of the lower side pipe arm, and the upper sleeve and the lower sleeve are communicated through a plurality of descending pipes;
the radiating fins are of hollow structures, two radiating surfaces of each radiating fin are tightly attached to the maximum heating surface of a battery, the upper parts of the radiating fins are communicated with the upper sleeve through upper connecting pipes, the lower parts of the radiating fins are communicated with the lower sleeve through lower connecting pipes, and the radiating fins, the upper connecting pipes, the lower connecting pipes, the upper sleeve, the lower sleeve and the descending pipes form communicating spaces.
In some embodiments, when the temperature of the heat generating surface of the battery rises, the refrigerant in the heat sink is heated to generate steam, the steam enters the annular space between the upper sleeve and the U-shaped cooling water pipe through the upper connecting pipe, the steam is condensed on the outer surface of the upper pipe arm of the U-shaped cooling water pipe to form condensate, and the condensate enters the lower sleeve through the lower pipe and then enters the heat sink through the lower connecting pipe.
In some embodiments, the low temperature cooling water flows in from the upper side tube arms, and flows out from the lower side tube arms after exchanging heat with the steam.
In some embodiments, the lower connection pipe is located at any position of the lower pipe arm in the vertical direction, and the upper connection pipe is located at any position of the upper pipe arm in the vertical direction.
In some embodiments, the refrigerant is injected in an amount of 20% to 90% of the inner space of the heat sink.
In some embodiments, a plurality of the radiating fins are symmetrically arranged on the left side and the right side of the U-shaped cooling water pipe in parallel.
In some embodiments, several of the parallel fins have the same evaporation pressure.
In some embodiments, the upper tube arm outer wall and the upper sleeve and the lower tube arm outer wall and the lower sleeve are hermetically connected by a reducer.
In some embodiments, a thermally conductive adhesive is disposed between the heat dissipating surface of the heat sink and the heat generating surface of the battery.
In some embodiments, the thermally conductive paste is one of a silicone thermally conductive paste, a polyurethane paste, or a thermally conductive silicone paste.
Compared with the prior art, the invention has the beneficial effects that:
the refrigerants in the radiating fins have the same evaporation temperature, the cooling temperature of each square battery is the same, the problem that the cooling temperature of each square battery is different due to the fact that the serpentine cooling pipe is increased along with the temperature of the cooling water is solved, and the temperature consistency among different square batteries is improved.
The cooling power of the heat dissipation device can be adaptive to the heating power of the square battery, and the surface temperature of the square battery with high heating power is increased, so that the steam yield in the heat dissipation sheet connected with the square battery is increased, more heat is taken away, and the temperature of the square battery is reduced.
The phase change heat transfer is carried out between the square battery and the refrigerant and between the refrigerant and the U-shaped cooling water pipe, the heat transfer system is high, and the cooling effect can be improved.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view illustrating a heat dissipation device combined with a battery cell;
FIG. 2 is a schematic view of a heat dissipation device;
FIG. 3 is a schematic view showing a connection structure between a U-shaped cooling water pipe, a jacket and a downcomer;
FIG. 4 is a schematic view of the heat sink after the refrigerant is injected therein;
description of reference numerals:
1. a square battery; 2. a heat sink; 3. a U-shaped cooling water pipe; 4. sleeving a sleeve; 5. setting a sleeve; 6. a down pipe; 7. an upper connecting pipe; 8. a lower connecting pipe; 9. an upper side pipe arm; 10. a lower tubular arm.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A heat sink for a lithium ion battery according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 to 4, the heat dissipation device for lithium ion batteries of the present invention includes a U-shaped cooling water pipe 3, a heat dissipation fin 2, a down pipe 6, an upper sleeve 4, a lower sleeve 5, an upper connection pipe 7, and a lower connection pipe 8.
The U-shaped cooling water pipe 3 includes an upper side pipe arm 9 and a lower side pipe arm 10, the upper side pipe arm 9 is located above the lower side pipe arm 10, and the upper side pipe arm 9 and the lower side pipe arm 10 are communicated so that cooling water can flow in from the upper side pipe arm 9 and then flow out from the lower side pipe arm 10.
The cooling water is used for exchanging heat with steam generated by heating the refrigerant so as to condense the steam into condensate, the cooling water is low-temperature cooling water, and the temperature of the low-temperature cooling water is lower than 20 ℃. It will be appreciated that the appropriate cooling water temperature is selected according to various operating conditions.
The low-temperature cooling water in the heat dissipation device flows only in the U-shaped cooling water pipe 3, the U-shaped cooling water pipe 3 is large in pipe diameter, short in length and small in flow resistance, and the energy consumption of a cooling water system can be reduced by more than 40%.
Go up side pipe arm 9 external seal and connect upper casing pipe 4, specifically do, go up sleeve pipe 4 cover and establish in the upside pipe arm 9 outside, go up sleeve pipe 4's length and be less than the length of upside pipe arm 9, go up sleeve pipe 4's both ends and the outer wall sealing connection of upside pipe arm 9 to form annular space between upper casing pipe 4 and the upside pipe arm 9 outer wall. In some embodiments, the outer wall of the upper tube arm 9 is sealingly connected to said upper sleeve 4 by a reducer. The cross section area of the reducing pipe is gradually reduced from small to large, one end with the larger cross section area of the reducing pipe is connected with the upper sleeve pipe 4, and one end with the smaller cross section area of the reducing pipe is connected with the upper side pipe arm 9, so that two ends of the upper sleeve pipe 4 are hermetically connected with the outer wall of the upper side pipe arm 9 through the reducing pipe, and a cavity with two sealed ends is formed.
The outside sealing connection lower tube 5 of lower side tube arm 10 specifically is, and lower tube 5 cover is established outside lower side tube arm 10, and the length of lower tube 5 is less than the length of lower side tube arm 10, and the both ends of lower tube 5 and the outer wall sealing connection of lower side tube arm 10 to form annular space between lower tube 5 and lower side tube arm 10 outer wall. In some embodiments, the outer wall of lower tubular arm 10 is sealingly connected to lower sleeve 5 by a reducer. The cross-sectional area of the reducing pipe is gradually reduced from small to large, the end with the larger cross-sectional area of the reducing pipe is connected with the lower sleeve pipe 5, and the end with the smaller cross-sectional area of the reducing pipe is connected with the lower side pipe arm 10, so that the two ends of the lower sleeve pipe 5 are hermetically connected with the outer wall of the lower side pipe arm 10 through the reducing pipe, and a cavity with two sealed ends is formed.
The upper casing 4 is communicated with the lower casing 5 through the downcomer 6, and the downcomer 6 is arranged between the upper casing 4 and the lower casing 5, so that the upper casing 4 positioned above is communicated with the lower casing 5 positioned below, and condensate formed on the outer wall of the upper casing arm 9 can enter the lower casing 5 through the downcomer 6. Several downcomers 6 can be arranged between the upper jacket 4 and the lower jacket 5. It will be appreciated that the provision of a plurality of downcomers 6 increases the flow of condensate and thus further increases the efficiency of heat removal. Preferably, the downcomer 6 is arranged vertically between the upper jacket 4, which is located above, and the lower jacket 5, which is located below.
The radiating fins 2 are of a hollow structure, the refrigerant is injected into the inner space of the radiating fins 2 of the hollow structure after the radiating fins are vacuumized, and the refrigerant is heated and evaporated to absorb heat generated by the battery in the charging and discharging process, so that the temperature of the battery is reduced, the lithium ion battery is in a proper temperature interval, and the problem that the safety of an energy storage system is affected due to the thermal runaway of the lithium ion battery is avoided. Preferably, the injection amount of the refrigerant is 20% -90% of the inner space of the heat radiating fin 2. In addition, the refrigerant is non-combustible and non-conductive, and even leakage does not cause short circuit of the battery, so the heat dissipation device of the invention has high safety.
Taking the prismatic battery 1 as an example, the maximum surface of the prismatic battery 1 is the maximum heat generating surface of the prismatic battery 1, each of the heat radiating fins 2 has two heat radiating surfaces, and the maximum heat generating surface of the prismatic battery 1 is closely attached to the heat radiating surface of the heat radiating fin 2, thereby improving the heat radiating efficiency. As shown in fig. 1, heat dissipation fins 2 are provided between two adjacent prismatic batteries 1, and the two heat dissipation surfaces of each heat dissipation fin 2, except for the outermost heat dissipation fin 2, are in close contact with the maximum heat generation surface of one prismatic battery 1, respectively.
In some embodiments, a heat conductive adhesive is disposed between the heat dissipating surface of the heat sink 2 and the heat generating surface of the prismatic battery 1. It is understood that the heat transfer efficiency can be improved by providing the heat conductive paste between the heat radiating surface of the heat radiating fin 2 and the heat generating surface of the square battery 1, thereby improving the heat radiating efficiency. Wherein the heat-conducting glue is one of organic silicon heat-conducting glue, polyurethane glue or heat-conducting silica gel. It is understood that the thermally conductive adhesive may be other suitable materials.
The upper part of the radiating fin 2 is communicated with the upper sleeve 4 through an upper connecting pipe 7, and the lower part of the radiating fin 2 is communicated with the lower sleeve 5 through a lower connecting pipe 8. Specifically, the upper part of the radiating fin 2 is provided with a connecting hole for connecting an upper connecting pipe 7, the outer wall of the upper sleeve 4 is also provided with a connecting hole for connecting the upper connecting pipe 7, namely, one end of the upper connecting pipe 7 is communicated with the upper part of the radiating fin 2, and the other end of the upper connecting pipe 7 is communicated with the upper sleeve 4, so that the radiating fin 2 is communicated with the upper sleeve 4 through the upper connecting pipe 7; the lower part of the radiating fin 2 is provided with a connecting hole for connecting a lower connecting pipe 8, the outer wall of the lower sleeve 5 is also provided with a connecting hole for connecting the lower connecting pipe 8, namely, one end of the lower connecting pipe 8 is communicated with the lower part of the radiating fin 2, the other end of the lower connecting pipe 8 is communicated with the lower sleeve 5, so that the radiating fin 2 is communicated with the lower sleeve 5 through the lower connecting pipe 8, and the upper sleeve 4 is communicated with the lower sleeve 5 through a descending pipe 6, so far, the radiating fin 2, the upper connecting pipe 7, the lower connecting pipe 8, the upper sleeve 4, the lower sleeve 5 and the descending pipe 6 form a communicating space.
The lower connecting pipe 8 is located at an arbitrary position of the lower pipe arm 10 in the vertical direction, and the upper connecting pipe 7 is located at an arbitrary position of the upper pipe arm 9 in the vertical direction. Specifically, one end of an upper connecting pipe 7 is connected with an upper sleeve 4, the upper sleeve 4 is sleeved outside an upper side pipe arm 9, and the upper connecting pipe 7 is used for enabling steam to enter an annular space between the upper sleeve 4 and the upper side pipe arm 9 from the upper connecting pipe 7, so that the upper connecting pipe 7 and the upper side pipe arm 9 do not need to be specified in an up-down position relation in the vertical direction; one end of the lower connecting pipe 8 is connected with the lower sleeve 5, the lower sleeve 5 is sleeved outside the lower side pipe arm 10, the lower connecting pipe 8 is used for enabling condensate to enter the lower connecting pipe 8 through the descending pipe 6 from an annular space between the lower sleeve 5 and the lower side pipe arm 10 and finally enter the radiating fins 2, and therefore the lower connecting pipe 8 and the lower side pipe arm 10 do not need to be specified in the vertical direction.
The radiating fins 2 are symmetrically arranged on the left side and the right side of the U-shaped cooling water pipe 3 in parallel, and the radiating fins 2 arranged on the left side and the right side of the U-shaped cooling water pipe 3 in parallel are communicated with each other.
In the working process, the refrigerant is injected after the internal space of the heat dissipation device is vacuumized, and it can be understood that the appropriate refrigerant is selected according to the working condition. As shown by the dotted line in fig. 4, after the refrigerant is injected, the liquid level of the refrigerant in the fin 2 becomes equal to the liquid level of the refrigerant in the downcomer 6 based on the principle of the communicating vessel.
When the temperature of the heating surface of the square battery 1 rises, the refrigerant in the radiating fin 2 is heated to generate steam, the steam enters an annular space between the upper sleeve 4 and the U-shaped cooling water pipe 3 through the upper connecting pipe 7, the outer surface of the upper pipe arm 9 of the U-shaped cooling water pipe 3 is condensed into condensate, and the condensate enters the lower sleeve 5 through the descending pipe 6 and then enters the radiating fin 2 through the lower connecting pipe 8.
Specifically, in the charging and discharging process, the temperature of the heating surface of the square battery 1 rises, the maximum heating surface of the square battery 1 is in contact with the radiating surface of the radiating fin 2, so that heat is conducted to the radiating fin 2, the refrigerant in the radiating fin 2 is heated and evaporated to generate steam, and the refrigerant is evaporated to absorb heat so as to take out the heat generated by the square battery 1; steam generated by heating of the refrigerant enters an annular space between the upper sleeve 4 and the U-shaped cooling water pipe 3 through an upper connecting pipe 7 at the upper part of the radiating fin 2, low-temperature cooling water flows in from an upper side pipe arm 9 of the U-shaped cooling water pipe 3, so that the steam exchanges heat with the low-temperature cooling water, and the steam is condensed into condensate on the outer surface of the upper side pipe arm 9; the condensate enters the downcomer 6 to enable the liquid level of the refrigerant in the downcomer 6 to rise, and based on the principle of a communicating vessel, the liquid level of the refrigerant in the downcomer 6 and the liquid level of the refrigerant in the radiating fins 2 tend to be equal in height, so that after the condensate enters the downcomer 6, the liquid level of the refrigerant in the downcomer 6 rises firstly and then falls, and the condensate enters the lower sleeve 5 located at the lower parts of the radiating fins 2 through the downcomer 6 and finally enters the radiating fins 2 through the lower connecting pipe 8.
The plurality of radiating fins 2 connected in parallel have the same evaporation pressure, so the evaporation temperature is the same, the cooling temperature for each square battery 1 is the same, the problem that the cooling temperature for each square battery 1 is different due to the fact that the serpentine cooling pipe scheme is increased along with the temperature of the cooling water is solved, the temperature consistency among different square batteries 1 is improved, and the temperature difference among the square batteries 1 is smaller and even lower than 1 ℃.
The cooling power of the heat dissipation device can be adaptive to the heating power of the square batteries 1, and in the working process, if the temperature of one square battery 1 is higher than the temperature of other square batteries 1, the steam yield in the adjacent heat dissipation fins 2 is increased, so that more heat is brought out, and the temperature of the square batteries 1 is rapidly reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 may be directed to different 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A heat sink for a lithium ion battery, comprising:
the U-shaped cooling water pipe comprises an upper pipe arm and a lower pipe arm positioned below the upper pipe arm, an upper sleeve is sleeved outside the upper pipe arm, two ends of the upper sleeve are hermetically connected with the outer wall of the upper pipe arm, a lower sleeve is sleeved outside the lower pipe arm, two ends of the lower sleeve are hermetically connected with the outer wall of the lower pipe arm, and the upper sleeve and the lower sleeve are communicated through a plurality of descending pipes;
the radiating fins are of hollow structures, two radiating surfaces of each radiating fin are tightly attached to the maximum heating surface of a battery, the upper parts of the radiating fins are communicated with the upper sleeve through upper connecting pipes, the lower parts of the radiating fins are communicated with the lower sleeve through lower connecting pipes, and the radiating fins, the upper connecting pipes, the lower connecting pipes, the upper sleeve, the lower sleeve and the descending pipes form communicating spaces.
2. The apparatus of claim 1, wherein when the temperature of the heat generating surface of the battery is increased, the refrigerant in the heat sink is heated to generate steam, the steam enters the annular space between the upper sleeve and the U-shaped cooling water pipe through the upper connecting pipe, the steam is condensed to be condensate on the outer surface of the upper pipe arm of the U-shaped cooling water pipe, and the condensate enters the heat sink through the lower connecting pipe after entering the lower sleeve through the lower pipe.
3. The apparatus of claim 2 wherein said lower cooling water flows in from said upper tube arms and out from said lower tube arms after exchanging heat with said steam.
4. The apparatus of claim 1, wherein said lower connecting tube is positioned at any position of said lower tube arm in a vertical direction, and said upper connecting tube is positioned at any position of said upper tube arm in a vertical direction.
5. The apparatus of claim 2, wherein the refrigerant is injected in an amount of 20% to 90% of the inner space of the heat sink.
6. The device as claimed in claim 1, wherein a plurality of said heat dissipating fins are symmetrically disposed in parallel on both left and right sides of said U-shaped cooling water pipe.
7. The apparatus of claim 1, wherein a number of said fins in parallel have the same evaporation pressure.
8. The apparatus of claim 1, wherein said upper tube arm outer wall and said upper sleeve and said lower tube arm outer wall and said lower sleeve are sealingly connected by a reducer.
9. The device of claim 1, wherein a thermally conductive adhesive is disposed between the heat dissipating surface of the heat sink and the heat generating surface of the battery.
10. The apparatus of claim 9, wherein the thermally conductive adhesive is one of a silicone, polyurethane, or silicone thermally conductive adhesive.
CN202210761194.1A 2022-06-30 2022-06-30 Lithium ion battery heat abstractor Pending CN115117508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210761194.1A CN115117508A (en) 2022-06-30 2022-06-30 Lithium ion battery heat abstractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210761194.1A CN115117508A (en) 2022-06-30 2022-06-30 Lithium ion battery heat abstractor

Publications (1)

Publication Number Publication Date
CN115117508A true CN115117508A (en) 2022-09-27

Family

ID=83329757

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Application Number Title Priority Date Filing Date
CN202210761194.1A Pending CN115117508A (en) 2022-06-30 2022-06-30 Lithium ion battery heat abstractor

Country Status (1)

Country Link
CN (1) CN115117508A (en)

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