Heat dissipation device based on collaborative heat transfer of heat pipe and liquid cooling channel

Abstract

The utility model belongs to the technical field of battery pack heat dissipation, and discloses a heat dissipation device based on collaborative heat transfer of a heat pipe and a liquid cooling channel. The shell is a cylinder with the section being a circular ring, a plurality of containing grooves used for containing the battery bodies are formed in the shell, and the containing grooves are annularly and evenly distributed around the central axis of the shell. A first liquid tray and a second liquid tray are respectively fixed at the upper end and the lower end of the shell, the first liquid tray and the second liquid tray are of hollow shell-shaped structures, a liquid inlet hole is formed in the first liquid tray, and a liquid outlet hole is formed in the second liquid tray; the first liquid disc and the second liquid disc are in through connection through a plurality of cooling pipes, and the cooling pipes are all fixed in the shell; a plurality of heat pipes which are vertically placed are fixed in the shell, and the upper ends of the heat pipes penetrate through the shell and extend into the first liquid disc; and through the cooperative arrangement of the cooling pipe and the heat pipe, heat generated by the battery body can be quickly transferred and dissipated, so that the heat dissipation efficiency and the heat dissipation effect of the battery pack are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery pack heat dissipation, and in particular relates to a heat dissipation device based on the coordinated heat transfer of a heat pipe and a liquid cooling channel. Background Art

[0002] Power batteries are widely used in the field of new energy vehicles due to their environmental protection, energy saving and good stability, and are the core components of electric vehicles. At present, the commonly used power batteries on the market mainly include lead-acid batteries, nickel-based batteries, lithium-ion batteries and fuel cells. Among them, lithium-ion batteries have the advantages of high energy, small size and light weight and are widely used in the field of new energy electric vehicles, serving as energy storage devices for electric vehicle power units; however, since power batteries are composed of multiple batteries connected in series or in parallel, a large amount of heat will be generated during operation. If the heat generated by the battery cannot be dissipated in time, heat will continue to accumulate between the batteries, and the temperature will continue to rise, which will affect the performance and life of the battery, and even cause thermal runaway, causing the battery to smoke and explode; currently, the heat dissipation of the battery pack is mainly separated by heat insulation materials, and then the bottom of the battery is dissipated by a liquid cooling device, and this method is relatively slow in the heat dissipation of the battery pack; therefore, there is a problem of poor heat dissipation effect on the battery pack in the prior art. Utility Model Content

[0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a heat dissipation device based on the coordinated heat transfer of heat pipes and liquid cooling channels, which solves the problem of poor heat dissipation effect on battery packs in the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A heat dissipation device based on cooperative heat transfer of a heat pipe and a liquid cooling channel, comprising a housing;

[0006] The shell is a cylinder with a circular cross section, and a plurality of placement grooves for placing the battery body are arranged inside the shell, and the plurality of placement grooves are evenly distributed in a ring shape around the central axis of the shell;

[0007] A first liquid pan and a second liquid pan are fixed to the upper and lower ends of the shell, respectively. The first liquid pan and the second liquid pan are both hollow shell-like structures. A liquid inlet hole is provided on the first liquid pan, and a liquid outlet hole is provided on the second liquid pan.

[0008] The first liquid pan and the second liquid pan are connected through a plurality of cooling pipes, and the cooling pipes are all fixed inside the shell;

[0009] A plurality of heat pipes are vertically fixed inside the shell, and the upper ends of the heat pipes pass through the shell and extend into the first liquid tray;

[0010] The cooling pipes are all placed vertically, and the cross-sections of the cooling pipes are all rectangular;

[0011] The number of cooling pipes is equal to the number of placement slots, and the multiple cooling pipes are evenly distributed in a ring shape around the central axis of the shell, and there is a cooling pipe between any two adjacent placement slots;

[0012] The number of heat pipes is twice the number of cooling pipes;

[0013] Any cooling pipe corresponds to two heat pipes, and the two heat pipes are respectively located on both sides of the cooling pipe, one heat pipe is located on the side of the cooling pipe close to the central axis of the shell, and the other heat pipe is located on the side of the cooling pipe away from the central axis of the shell;

[0014] A first annular thermoelectric cooler is fixed on the inner peripheral wall of the shell, and a second annular thermoelectric cooler is fixed on the outer peripheral wall of the shell. The first thermoelectric cooler and the second thermoelectric cooler are both placed coaxially with the shell.

[0015] A heat dissipation strip is fixed on the second thermoelectric cooler, and the heat dissipation strip is spirally wound on the outer peripheral wall of the second thermoelectric cooler;

[0016] The first liquid pan and the second liquid pan are both annular, and are placed coaxially with the housing.

[0017] Beneficial effects of the utility model:

[0018] 1. The present application is provided by the coordinated arrangement of the shell, the first liquid pan, the second liquid pan, the cooling pipe and the heat pipe, and by continuously injecting the coolant, the coolant continuously flows downward into the second liquid pan through the cooling pipe. Due to the close contact between the cooling pipe and the shell, the heat of the shell can be effectively dissipated; at the same time, the heat pipe continuously absorbs the heat in the shell and transfers it to the coolant in the first liquid pan. Through the coordinated arrangement of the cooling pipe and the heat pipe, the heat generated by the battery body can be quickly transferred and dissipated, thereby improving the heat dissipation efficiency and heat dissipation effect of the battery pack;

[0019] After the first liquid pan and the second liquid pan are filled with coolant, the top and bottom of the shell and the battery body can also be cooled to a certain extent;

[0020] 2. The cross section of the cooling pipe is set to a rectangular shape, which can increase the effective heat dissipation area between the cooling pipe and the shell under the condition of the same coolant flow in the cooling pipe, and further improve the heat dissipation effect;

[0021] 3. This application effectively improves the uniformity of heat dissipation of the battery pack and reduces the generation of local high temperature through evenly distributed heat pipes and cooling pipes;

[0022] 4. The first thermoelectric cooler and the second thermoelectric cooler are arranged in coordination, so that when necessary, the first thermoelectric cooler and the second thermoelectric cooler can absorb the heat of the shell, and then dissipate the heat from the inner and outer peripheral walls of the shell, and dissipate the heat from the top, bottom, inside, and inner and outer walls of the battery pack at the same time, so as to achieve all-round heat dissipation of the battery pack, and effectively improve the heat dissipation effect and efficiency of the battery pack;

[0023] At the same time, in a cold low-temperature environment, the present application can heat the battery pack through the first thermoelectric cooler and the second thermoelectric cooler, reduce the decrease in battery capacity caused by low temperature conditions, and ensure the normal operation of the battery body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is an exploded view of the overall structure of the utility model;

[0026] Figure 2 It is an exploded view of the overall structure of the utility model from different viewing angles;

[0027] Figure 3 It is a partial structural schematic diagram of the heat pipe of the utility model;

[0028] Figure 4 It is a schematic diagram of the shell structure of the utility model;

[0029] Figure 5 This is a schematic diagram of the cooling pipe structure of the utility model;

[0030] Figure 6 It is a schematic diagram of the structure of the liquid cooling channel tube of the utility model. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Please refer to Figures 1 to 6 , a heat dissipation device based on cooperative heat transfer between a heat pipe and a liquid cooling channel, comprising a housing 100;

[0033] The housing 100 is a cylinder with a circular cross section. A plurality of placement grooves 101 for placing the battery body 200 are provided inside the housing 100. The plurality of placement grooves 101 are evenly distributed in a ring shape around the central axis of the housing 100.

[0034] The first liquid pan 300 and the second liquid pan 400 are respectively fixed at the upper and lower ends of the housing 100. The first liquid pan 300 and the second liquid pan 400 are both hollow shell-like structures. The first liquid pan 300 is provided with a liquid inlet hole 301, and the second liquid pan 400 is provided with a liquid outlet hole 401.

[0035] The first liquid pan 300 and the second liquid pan 400 are connected through a plurality of cooling pipes 500, and the cooling pipes 500 are all fixed inside the housing 100;

[0036] A plurality of heat pipes 600 are vertically fixed inside the housing 100, and the upper ends of the heat pipes 600 pass through the housing 100 and extend into the first liquid tray 300;

[0037] The heat generated by the battery body 200 during operation is continuously transferred to the shell 100. When heat dissipation is required, coolant is continuously injected into the first liquid pan 300 through the liquid inlet hole 301, and the coolant continuously flows downward into the second liquid pan 400 through the cooling pipe 500. Due to the close contact between the cooling pipe 500 and the shell 100, the shell 100 can be effectively cooled. At the same time, the liquid in the heat pipe 600 is heated and evaporated at one end inside the shell 100, and the gas formed after evaporation is quickly condensed inside the heat pipe 600 located in the first liquid pan 300 section. Through the continuous evaporation and condensation of the liquid inside the heat pipe 600, the heat pipe 600 continuously absorbs the heat in the shell 100 and transfers it to the coolant in the first liquid pan 300. Through the coordinated arrangement of the cooling pipe 500 and the heat pipe 600, the heat generated by the battery body 200 can be quickly transferred and dissipated, thereby improving the heat dissipation efficiency.

[0038] And the cooling liquid is continuously injected, and the cooling liquid in the first liquid pan 300 and the second liquid pan 400 can also cool the upper and lower ends of the shell 100, so as to dissipate heat at the top and bottom of the shell 100;

[0039] Preferably, the present application can be used in conjunction with a circulation system in the prior art. After the coolant flowing into the second liquid pan 400 through the cooling pipe 500 flows out from the liquid outlet 401 , it can be re-injected into the liquid inlet 301 through the circulation system.

[0040] It should be noted that the number of placement slots 101 is opposite to and corresponds to the battery body 200 ;

[0041] like Figure 4As shown, the shell 100 is provided with a first tube groove 102 for accommodating the cooling pipe 500 and a second tube groove 103 for accommodating the heat pipe 600. The number of the first tube grooves 102 is equal to and corresponds to the number of the cooling pipes 500, and the number of the second tube grooves 103 is equal to and corresponds to the number of the heat pipes 600.

[0042] Preferably, the housing 100 is made of phase change material, such as graphite composite material, paraffin, etc.;

[0043] Preferably, a tubular heat pipe 600 may be used in the present application.

[0044] like Figure 5 As shown, the cooling tubes 500 are all placed vertically, and the cross-sections of the cooling tubes 500 are all rectangular; when the coolant flow rate in the cooling tubes 500 is the same, compared with the cooling tubes 500 with circular cross-sections, the cross-sections of the cooling tubes 500 are set to be rectangular, which can increase the effective heat dissipation area of ​​the cooling tubes 500 and the shell 100, and further improve the heat dissipation effect.

[0045] The number of cooling tubes 500 is equal to the number of placement slots 101. Multiple cooling tubes 500 are evenly distributed in a ring shape around the central axis of the shell 100, and there is a cooling tube 500 between any two adjacent placement slots 101. Through the uniform arrangement of the cooling tubes 500, the uniformity of heat dissipation of the battery pack can be effectively improved and the generation of local high temperature can be reduced.

[0046] The number of heat pipes 600 is twice the number of cooling pipes 500;

[0047] like Figure 3 As shown, any cooling pipe 500 corresponds to two heat pipes 600, and the two heat pipes 600 are respectively located on both sides of the cooling pipe 500, any heat pipe 600 is located on the side of the cooling pipe 500 close to the central axis of the shell 100, and the other heat pipe 600 is located on the side of the cooling pipe 500 away from the central axis of the shell 100; the heat dissipation uniformity on both sides of the shell 100 can be improved, and the heat dissipation efficiency can be improved at the same time.

[0048] A first annular thermoelectric cooler 700 is fixed on the inner peripheral wall of the shell 100, and a second annular thermoelectric cooler 800 is fixed on the outer peripheral wall of the shell 100. The first thermoelectric cooler 700 and the second thermoelectric cooler 800 are both placed coaxially with the shell 100. When in use, the first thermoelectric cooler 700 and the second thermoelectric cooler 800 are connected to an external power supply. When the temperature of the battery pack is too high and needs to be dissipated, the first thermoelectric cooler 700 and the second thermoelectric cooler 800 are turned on and enter the heat absorption mode to work. The first thermoelectric cooler 700 and the second thermoelectric cooler 800 absorb the heat transferred from the battery body 200 to the shell 100, and cooperate with the first liquid pan 300, the second liquid pan 400, the heat pipe 600 and the cooling pipe 500 to dissipate heat to the battery pack, so as to achieve comprehensive heat dissipation of the battery pack and improve the heat dissipation efficiency and effect.

[0049] At the same time, in a cold low-temperature environment, the battery pack can be heated by the first thermoelectric cooler 700 and the second thermoelectric cooler 800 to reduce the capacity drop of the battery body 200 caused by the low temperature and ensure the normal operation of the battery body 200.

[0050] A heat dissipation bar 801 is fixed to the second thermoelectric cooler 800, and the heat dissipation bar 801 is spirally wound on the outer peripheral wall of the second thermoelectric cooler 800; the heat on the second thermoelectric cooler 800 can be transferred to the heat dissipation bar 801, and the heat is released into the air through the contact between the heat dissipation bar 801 and the air, and the heat dissipation bar 801 is spiral, which increases the heat dissipation area, so as to achieve the purpose of facilitating heat dissipation on the side of the second thermoelectric cooler 800 away from the housing 100;

[0051] Preferably, the material of the heat dissipation strip 801 in the present application can be selected from metals with strong thermal conductivity such as copper;

[0052] Preferably, the first thermoelectric cooler 700 and the second thermoelectric cooler 800 of the present application can both be semiconductor thermoelectric coolers.

[0053] The first liquid pan 300 and the second liquid pan 400 are both annular, and are placed coaxially with the housing 100, so as to improve air circulation in the center of the battery pack and improve heat dissipation efficiency.

[0054] Since the diameter of the first thermoelectric cooler 700 is smaller than that of the second thermoelectric cooler 800, and the first thermoelectric cooler 700 is located at the center of the battery pack away from the shell 100, the air circulation on the side of the first thermoelectric cooler 700 away from the shell 100 is poor. In order to effectively dissipate the heat of the first thermoelectric cooler 700 away from the shell 100 in an emergency, and improve the heat dissipation effect of the battery pack in an emergency, a liquid cooling channel tube 701 is fixed on the inner peripheral wall of the first thermoelectric cooler 700, the liquid cooling channel tube 701 is placed coaxially with the shell 100, and the upper and lower ends of the liquid cooling channel tube 701 are open, and at the same time, a plurality of flow channel grooves 702 evenly distributed in an annular manner are opened inside the tube wall of the liquid cooling channel tube 701, and the flow channel grooves 702 all penetrate the upper and lower ends of the liquid cooling channel tube 701; the liquid cooling channel tube 701 is as shown in FIG. Figure 6 As shown, when emergency heat dissipation of the battery pack is required, the coolant can be poured directly into the liquid cooling channel tube 701 from the upper end of the first liquid pan 300, and the first thermoelectric cooler 700 absorbs the heat generated by the shell 100 and transfers it to the liquid cooling channel tube 701. The liquid cooling channel tube 701 is liquid-cooled by the coolant, and then the first thermoelectric cooler 700 is cooled away from the shell 100, so that the first thermoelectric cooler 700 can quickly absorb the heat generated by the shell 100, thereby improving the heat dissipation effect on the battery pack in an emergency.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A heat dissipation device based on cooperative heat transfer of a heat pipe and a liquid cooling channel, comprising a housing (100), characterized in that: The shell (100) is a cylinder with a circular cross-section, and a plurality of placement grooves (101) for placing the battery body (200) are provided inside the shell (100), and the plurality of placement grooves (101) are evenly distributed in a ring shape around the central axis of the shell (100); A first liquid pan (300) and a second liquid pan (400) are respectively fixed at the upper and lower ends of the housing (100); the first liquid pan (300) and the second liquid pan (400) are both shell-like structures with a hollow interior; the first liquid pan (300) is provided with a liquid inlet hole (301), and the second liquid pan (400) is provided with a liquid outlet hole (401); The first liquid pan (300) and the second liquid pan (400) are connected through a plurality of cooling pipes (500), and the cooling pipes (500) are all fixed inside the housing (100); A plurality of vertically placed heat pipes (600) are fixed inside the shell (100), and the upper ends of the heat pipes (600) all pass through the shell (100) and extend into the first liquid tray (300).

2. The heat dissipation device based on the coordinated heat transfer of heat pipes and liquid cooling channels according to claim 1, characterized in that: The cooling pipes (500) are all placed vertically, and the cross-sections of the cooling pipes (500) are all rectangular.

3. The heat dissipation device based on the coordinated heat transfer of heat pipes and liquid cooling channels according to claim 2, characterized in that: The number of cooling pipes (500) is equal to the number of placement slots (101); the plurality of cooling pipes (500) are evenly distributed in a ring shape around the central axis of the shell (100); and a cooling pipe (500) is provided between any two adjacent placement slots (101).

4. The heat dissipation device based on the coordinated heat transfer of heat pipes and liquid cooling channels according to claim 3 is characterized in that: The number of heat pipes (600) is twice the number of cooling pipes (500); Any cooling pipe (500) corresponds to two heat pipes (600), and the two heat pipes (600) are respectively located on both sides of the cooling pipe (500), any heat pipe (600) is located on the side of the cooling pipe (500) close to the central axis of the shell (100), and the other heat pipe (600) is located on the side of the cooling pipe (500) away from the central axis of the shell (100).

5. The heat dissipation device based on the coordinated heat transfer of heat pipes and liquid cooling channels according to claim 4, characterized in that: An annular first thermoelectric cooler (700) is fixed on the inner peripheral wall of the shell (100), and an annular second thermoelectric cooler (800) is fixed on the outer peripheral wall of the shell (100); the first thermoelectric cooler (700) and the second thermoelectric cooler (800) are both placed coaxially with the shell (100).

6. The heat dissipation device based on the cooperative heat transfer of heat pipes and liquid cooling channels according to claim 5, characterized in that: A heat dissipation bar (801) is fixed on the second thermoelectric cooler (800), and the heat dissipation bar (801) is spirally wound on the outer peripheral wall of the second thermoelectric cooler (800).

7. The heat dissipation device based on the cooperative heat transfer of heat pipes and liquid cooling channels according to claim 6, characterized in that: The first liquid pan (300) and the second liquid pan (400) are both annular in shape, and are both coaxially placed with the housing (100).

Images