CN106571499B - Thermal management system and method for cuboid battery pack - Google Patents
Thermal management system and method for cuboid battery pack Download PDFInfo
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- CN106571499B CN106571499B CN201510646598.6A CN201510646598A CN106571499B CN 106571499 B CN106571499 B CN 106571499B CN 201510646598 A CN201510646598 A CN 201510646598A CN 106571499 B CN106571499 B CN 106571499B
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Abstract
The invention relates to a thermal management system and a thermal management method for a cuboid battery pack, wherein the system comprises a micro-heat tube array plate, a heat exchange element and a heat source, when radiating, an evaporation section of the micro-heat tube array plate is attached to a battery plate surface of the cuboid battery pack, a condensation section of the micro-heat tube array plate extends out of the side surface of the cuboid battery pack, the heat exchange element is arranged on the condensation section of the micro-heat tube array plate, and a heat pipe effect occurs after the evaporation section of the micro-heat tube array plate absorbs heat energy of the cuboid battery pack, and then the condensation section of the micro-heat tube array plate exchanges heat with the outside through the heat exchange element; when preheating, the heat source is arranged at the evaporation section of the micro-heat tube array plate, the condensation section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, and the evaporation section of the micro-heat tube array plate absorbs the heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat tube array plate. The system integrates the heat dissipation and heating functions, and improves the heat exchange efficiency.
Description
Technical Field
The invention relates to the technical field of thermal management, in particular to a thermal management system and a thermal management method for a cuboid battery pack by using a micro-thermal tube array plate.
Background
In the future of the automobile industry, electric automobiles using vehicle-mounted batteries (storage batteries/lithium batteries) as power are paid attention to and developed with the advantages of low pollution, energy conservation, high thermal efficiency and the like. The electric automobile adopts electric energy to replace petroleum and other conventional fossil fuels as power, has obvious environmental protection advantage, and is a long-term scheme suitable for solving the field of future transportation means. The vehicle-mounted battery is used as a key technology of electric automobile power, a large amount of heat can be accumulated in the vehicle-mounted battery in the high-current charging and discharging process, if the heat is not removed in time, the temperature of the battery is rapidly increased, particularly, a high-capacity battery pack is higher in heat release quantity, heat is easier to accumulate because the energy density is needed, thermal runaway is caused, the consequences of gas release, smoke emission and liquid leakage of the battery are further brought, the battery can be possibly burnt, otherwise, when the vehicle-mounted battery is in a low-temperature environment, the service life is possibly shortened, the charging and discharging capability is weakened, the working temperature range of the vehicle-mounted battery is generally required to be kept at 0-45 ℃, and therefore the thermal management problem and the like become important factors for restricting the development of the electric automobile. The existing thermal management system generally adopts the direct air cooling of each battery monomer or the liquid cooling and other structures of the battery pack shell, so that the efficiency is low, the temperature uniformity is poor, the system structure is too huge, complex and high in cost, in addition, the traditional heating system generally adopts an electric heating plate or an electric heating film to directly heat or indirectly heat the battery pack shell, the system cannot be unified with a heat dissipation system, the heating efficiency is low, the heating time is long, and the safety risk is high. Therefore, the practical application of the heat dissipation and heating system of the conventional battery and the battery pack thereof is greatly limited and the practical effect is poor. Because of a series of problems such as water resistance, dust resistance, dew prevention and the like, the battery pack box body needs to be totally closed, and therefore a compact and effective heat dissipation mode is needed; in addition, the existing vehicle-mounted battery thermal management system cannot realize the preheating function of the vehicle-mounted battery in cold areas or in cold weather without increasing the limitation of volume and cost.
Disclosure of Invention
Aiming at the problems of poor heat dissipation effect, poor battery temperature uniformity, weak thermal runaway prevention capability, mutually independent high-temperature heat dissipation and low-temperature heating systems (namely double systems), large system volume structure, high cost, low protection level of a battery box and the like of the traditional vehicle-mounted battery heat management system, the invention provides a novel heat management system of a cuboid battery pack, which ensures the high-efficiency heat dissipation and uniform battery temperature of the cuboid battery and simultaneously realizes the high-efficiency low-temperature heating function through a micro-heat pipe array plate and a high-efficiency heat exchange element and the cuboid battery, and meanwhile, the heat management system has compact volume, light weight and low cost, and the battery box body can realize high-level protection. The invention also relates to a thermal management method for the cuboid battery pack.
The technical scheme of the invention is as follows:
a thermal management system for a cuboid battery pack is characterized by comprising a micro-heat tube array plate, a heat exchange element and a heat source, wherein the micro-heat tube array plate is of a plate-shaped structure which is formed by extrusion of a metal material and is provided with more than two micro-heat tube arrays arranged side by side, the equivalent diameter of each micro-heat tube in the micro-heat tube array is 0.2mm-2.5mm,
When the heat dissipation is carried out on the cuboid battery pack, the evaporation section of the micro-heat pipe array plate is attached to the battery panel surface of the cuboid battery pack, the condensation section of the micro-heat pipe array plate extends out of the side surface of the cuboid battery pack, the heat exchange element is arranged on the condensation section of the micro-heat pipe array plate, the evaporation section of the micro-heat pipe array plate absorbs the heat energy of the cuboid battery pack and then generates a heat pipe effect, and the condensation section of the micro-heat pipe array plate exchanges heat with the outside through the heat exchange element;
when the cuboid battery pack is preheated, the heat source is arranged at the evaporation section of the micro-heat pipe array plate, the condensation section of the micro-heat pipe array plate is attached to the battery plate surface of the cuboid battery pack, and the evaporation section of the micro-heat pipe array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat pipe array plate.
The evaporator section of the micro-heat tube array plate attached to the battery plate surface of the cuboid battery pack when the cuboid battery pack dissipates heat is the condensation section of the micro-heat tube array plate attached to the battery plate surface of the cuboid battery pack when the cuboid battery pack is preheated and is the middle section of the micro-heat tube array plate, two ends of the micro-heat tube array plate extend out to the outside of the side surface of the cuboid battery pack, one end of the micro-heat tube array plate is provided with a heat source, and the other end of the micro-heat tube array plate is provided with a heat exchange element.
The heat source is an electric heating element or a heated fluid medium pipeline, the electric heating element is a resistance wire or an electric heating film, and the resistance wire or the electric heating film is arranged at one end of the micro-heat tube array plate;
and/or the heat exchange element is a heat sink or a heat exchanger;
and/or capillary structures are arranged in the inner walls of the micro heat pipes in the micro heat pipe array plate.
The outside of the micro heat pipe array plate is provided with one or more grooves along the length direction of the micro heat pipe array, the grooves are mutually independent with the micro heat pipe array, the heat source is a resistance wire, and the resistance wire is arranged in the grooves.
The micro heat pipe array plate further comprises a heat transport channel, wherein the heat transport channel is communicated with one end of the micro heat pipe array plate, on which a heat exchange element is arranged, and the heat exchange element is arranged along the direction of the heat transport channel; when the heat dissipation is carried out on the cuboid battery pack, the evaporation section of the micro-heat pipe array plate absorbs the heat energy of the cuboid battery pack, then the heat pipe effect is generated, and the heat exchange is carried out on the condensation section of the micro-heat pipe array plate through the heat exchange element and the heat is discharged through the heat transport channel.
The heat transport channel is an air channel, and cold air is transported in the air channel when the cuboid battery pack dissipates heat; and when the cuboid battery pack is preheated, hot air is conveyed in the ventilating duct.
When the cuboid battery pack dissipates heat, the two side surfaces of the evaporation section of the micro-heat pipe array plate are respectively and directly or indirectly attached to the battery plate surfaces of two adjacent cuboid batteries; the micro-heat tube array plate is arranged in an upward inclined mode, and the height of one end, provided with the heat exchange element, of the micro-heat tube array plate is higher than the height of the part, attached to the battery plate surface of the cuboid battery pack, of the micro-heat tube array plate.
The thickness of the micro heat pipe array plate is 1.2mm-3.0mm, a heat conducting medium is filled between the micro heat pipe array plate and the cuboid battery pack, and a heat conducting medium is filled between the micro heat pipe array plate and the heat exchange element;
and/or when the capillary structure is arranged in the inner wall of each micro heat pipe, the capillary structure is a micro fin with a heat transfer enhancement function or an inward concave micro groove running along the length direction of the micro heat pipe, which is arranged in the inner wall of each micro heat pipe, and the size and the structure of the micro fin are suitable for forming the capillary micro groove running along the length direction of the micro heat pipe with the inner wall of the micro heat pipe.
The heat management method for the cuboid battery pack is characterized in that heat exchange is carried out between a micro heat pipe array plate and the cuboid battery pack, the micro heat pipe array plate is of a plate-shaped structure which is formed by extrusion of a metal material and is provided with more than two micro heat pipe arrays arranged side by side, and the equivalent diameter of each micro heat pipe in the micro heat pipe array is 0.2-2.5 mm; when the heat dissipation is carried out on the cuboid battery pack, the evaporation section of the micro-heat pipe array plate is attached to the battery panel surface of the cuboid battery pack, the condensation section of the micro-heat pipe array plate extends out of the side surface of the cuboid battery pack, a heat exchange element is arranged on the condensation section of the micro-heat pipe array plate, the evaporation section of the micro-heat pipe array plate absorbs the heat energy of the cuboid battery pack and then generates a heat pipe effect, and the condensation section of the micro-heat pipe array plate exchanges heat with the outside through the heat exchange element; when the cuboid battery pack is preheated, a heat source is arranged at the evaporation section of the micro-heat pipe array plate, the condensation section of the micro-heat pipe array plate is attached to the battery plate surface of the cuboid battery pack, and the evaporation section of the micro-heat pipe array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat pipe array plate.
The adopted heat source is an electric heating element, the adopted electric heating element is a resistance wire or an electric heating film, both ends of the micro-heat tube array plate extend out of the side surface of the cuboid battery pack, one end of the micro-heat tube array plate is provided with a heat exchange element, the other end of the micro-heat tube array plate is wound with the resistance wire or the electric heating film, and the middle section of the micro-heat tube array plate is attached to the battery panel surface of the cuboid battery pack, so that the evaporation section of the micro-heat tube array plate when the cuboid battery pack dissipates heat is the condensation section of the micro-heat tube array plate when the cuboid battery pack is preheated;
or, the adopted heat source is an electric heating element, the electric heating element is a resistance wire, one or more grooves are formed in the micro heat pipe array plate along the length direction of the pipe parallel to the micro heat pipe array, the grooves are independent of the micro heat pipe array, and the resistance wire is arranged in the grooves.
One end of the micro-heat pipe array plate provided with a heat exchange element is communicated with an air channel, a static pressure box is arranged below the air channel, the heat exchange element is arranged along the direction of the air channel, and when the heat dissipation of the cuboid battery pack is achieved, the static pressure box conveys cold air to the air channel; when the rectangular battery pack is preheated, the static pressure box conveys hot air to the ventilating duct.
When the cuboid battery pack dissipates heat, the two side surfaces of the evaporation section of the micro-heat pipe array plate are respectively and directly or indirectly attached to the battery plate surfaces of two adjacent cuboid batteries, and the micro-heat pipe array plate is obliquely arranged upwards with an inclination angle of not more than 10 degrees, so that the height of one end of the micro-heat pipe array plate, which is provided with a heat sink, is higher than the height of the part of the micro-heat pipe array plate attached to the battery plate surfaces of the cuboid battery pack; the thickness of the micro heat pipe array plate is 1.2mm-3.0mm.
The invention has the following technical effects:
the invention relates to a thermal management system for an electric vehicle-mounted cuboid battery pack, which realizes thermal management adjustment of heat dissipation and preheating of the cuboid battery pack and comprises a micro-heat tube array plate, a heat exchange element and a heat source which are mutually matched. The management system adopts a novel micro-heat pipe array plate to exchange heat on the battery plate surface of each cuboid battery of the cuboid battery, the micro-heat pipe array plate is of a plate-shaped structure which is formed by extrusion of metal materials and internally provided with more than two micro-heat pipe arrays arranged side by side, the equivalent diameter of each micro-heat pipe in the micro-heat pipe array is 0.2mm-2.5mm, the micro-heat pipe array plate with a specific structure is designed specifically for the airtight space of the battery box of the electric vehicle-mounted cuboid battery, the micro-heat pipe array plate with the structure can be contacted with the largest area of the cuboid battery to exchange heat, the micro-heat pipe array plate has the advantages of high heat transfer efficiency, compact structure, light weight, no noise and no transmission part, the micro-heat pipe array plate can be arranged on the battery plate surface of the cuboid battery in a horizontal, vertical or random mode, the non-limiting setting mode can be selected according to practical application conditions, and the different arrangement numbers of the micro-heat pipe array plates and the specific arrangement modes can be adopted according to practical application conditions, and the ventilation requirements of the specific arrangement modes (the ventilation modes) can meet the requirements of the heat dissipation space. When the heat dissipation of the cuboid battery pack is carried out, the evaporation section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, the condensation section of the micro-heat tube array plate extends out of the side surface of the cuboid battery pack, the heat exchange element is arranged on the condensation section of the micro-heat tube array plate, the evaporation section of the micro-heat tube array plate can absorb a large amount of heat energy of the cuboid battery pack, a heat tube effect occurs in each micro-heat tube with the micro-heat tube array, and then the condensation section of the micro-heat tube array plate condenses and releases heat, and the heat released by the condensation section is exchanged with the outside through the heat exchange element such as a heat sink or a heat exchanger due to the fact that the condensation section is provided with the heat exchange element, a series of problems caused by direct heat exchange with fluid media (water or air) in the vehicle-mounted battery pack in the prior art are overcome, the heat dissipation efficiency and the effect are effectively improved, and the safety packaging are improved, and the heat exchange element arranged on the condensation section of the micro-heat tube array plate is combined to strengthen the heat dissipation, so that a heat management system is further optimized. When the cuboid battery pack is preheated, a heat source such as an electric heating element is arranged at the evaporation section of the micro-heat tube array plate, the condensation section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, the heat tube effect occurs in the micro-heat tube array plate after the evaporation section of the micro-heat tube array plate absorbs the heat energy of the electric heating element, and then the condensation section of the micro-heat tube array plate releases heat, and as the condensation section of the micro-heat tube array plate is in contact with the maximum area of the battery plate surface of the cuboid battery pack, large-area heat exchange can be realized, the heat released by condensation of the micro-heat tube array plate is quickly and efficiently transferred to the cuboid battery pack, the function of uniformly preheating the vehicle-mounted battery pack during vehicle starting can be realized, and the efficient operation of the battery is ensured. The heat management system integrates heat dissipation and heating functions, and the electric heating element does not start to work during heat dissipation, so that the required heat dissipation effect can be achieved through the naturally occurring heat pipe effect; when heating, the electric heating element is started, and the natural heat pipe effect of the micro heat pipe array plate is combined to achieve the required preheating effect. The system can be used for realizing heat dissipation under the high-temperature condition and heating under the low-temperature condition, so that the temperature uniformity of the vehicle-mounted cuboid battery pack is ensured, accessories such as a heat exchanger and a pipeline in an air cooling system are not required to be additionally arranged, a large amount of electric energy is not required to be consumed in the liquid cooling system, the problems of inconvenience in maintenance and replacement and the like are avoided, a refrigerant is not required to be additionally used, and the system cost is reduced.
The thermal management system provided by the invention can conveniently realize split installation of the vehicle-mounted battery pack, the micro-heat pipe array plate and the battery pack box body, namely, the vehicle-mounted battery pack and the micro-heat pipe array plate, the vehicle-mounted battery pack and the battery pack box body and the micro-heat pipe array plate and the battery pack box body can be respectively assembled, and a foundation is provided for split design of the vehicle-mounted battery thermal management system. The heat management system provided by the invention has an integrated structure, is simple in structure and compact in volume, and improves the heat dissipation efficiency and effect; the battery pack box is convenient to use, easy to install and detach, low in cost, capable of achieving high-level protection, and wide in application range except for high-efficiency application of high-efficiency thermal management of the vehicle-mounted battery.
The heat management system provided by the invention can adopt a structure that the evaporation section of the micro-heat pipe array plate is directly attached to the side surface (or the battery plate surface) of the cuboid battery, overcomes the defect that the vehicle-mounted battery pack in the prior art needs to directly exchange heat with a fluid medium (water or air) and has low efficiency and poor effect, reduces interface contact resistance, improves interface contact area, ensures that the vehicle-mounted battery can reach ideal heat dissipation temperature in a short time, and ensures that the temperature of the vehicle-mounted battery is uniform; more preferably, the two side surfaces of the evaporation section of the micro-heat pipe array plate are respectively and directly or indirectly attached to the battery plate surfaces of two adjacent cuboid batteries, so that the heat dissipation contact area is further increased, the heat dissipation efficiency and the heat dissipation effect are improved, the use quantity of the micro-heat pipe array plate is reduced, the system volume is reduced, the micro-heat pipe array plate is more suitable for a narrow airtight space in a battery box body, and the system cost is reduced.
According to the thermal management system provided by the invention, when the battery pack is placed upwards, namely the electrode is arranged on the battery pack, the micro-thermal tube array plate is arranged obliquely upwards, namely the micro-thermal tube array plate is arranged on the battery plate surface of the cuboid battery at an angle of certain upward inclination, for example, about 10 degrees, and the optimal angle is about 5 degrees, so that the liquid re-condensed in the condensation section of the micro-thermal tube array plate flows back to the evaporation section of the micro-thermal tube array plate more quickly by utilizing the gravity effect and the capillary effect, the heat generated by the vehicle-mounted battery pack can be continuously and quickly carried away at a high temperature in a rapid circulation manner, and the heat can be quickly introduced into the vehicle-mounted battery pack at a low temperature, so that the vehicle-mounted battery can reach an ideal heat dissipation temperature in a short time, and the temperature uniformity of the vehicle-mounted battery can be ensured.
The heat management system provided by the invention can adopt a heat transport channel such as a ventilating duct for ventilation treatment, adopts a forced convection heat exchange technology to strengthen the heat transfer of the micro-thermal tube array plate, and can adopt a static pressure box to convey cold air to the ventilating duct when radiating the cuboid battery pack, and finally, the heat emitted by the heat exchange element is taken away from the cuboid battery pack; in addition, the warm air is sent to the ventilating duct by changing the air supply temperature parameter of the static pressure box, so that the preheating of the vehicle-mounted battery pack can be realized, and the efficiency of the thermal management system is further improved.
The micro-heat pipe array plate adopted by the heat management system provided by the invention is of a flat plate structure which is formed by extrusion of metal materials and is provided with two or more micro-heat pipe arrays arranged side by side, two ends of each micro-heat pipe are sealed, liquid working medium is filled in each micro-heat pipe, a heat pipe effect is naturally formed, the manufacturing process of the micro-heat pipe array plate of the structure is simple, the heat management system has the advantage of high heat transfer efficiency, and meanwhile, the evaporation section is provided with a relatively large heat absorption surface, so that the heat absorption efficiency and the heat transfer efficiency of the vehicle-mounted battery can be further improved. Aiming at the structure in the vehicle-mounted battery pack box, the equivalent diameter of the micro heat pipe is 0.2mm-2.5mm, the thickness of the micro heat pipe array plate is 1.2mm-3.0mm, namely the range of the equivalent diameter of a single micro heat pipe is set, namely the overall heat transport capacity and the internal bearing capacity of the micro heat pipe array plate are further limited; the adopted micro heat pipe array plate is provided with two or more micro heat pipe arrays which are arranged side by side, the heat pipe effect can be independently generated in each micro heat pipe, even if a certain micro heat pipe is damaged, the normal work of other micro heat pipes can not be influenced, meanwhile, the micro heat pipe arrays can be simultaneously cooperated to work, the heat exchange efficiency is obviously improved, and in addition, each micro heat pipe can be internally provided with a micro fin (for forming a fine capillary groove) or a concave micro groove for enhancing the heat transfer, so that the heat dissipation capability of the unit steam flow flux of an evaporation section or a condensation section is greatly enhanced, and the heat transfer effect which is incomparable with that of the traditional heat pipes is realized.
The invention also relates to a thermal management method for the electric vehicle-mounted cuboid battery pack, which corresponds to the thermal management system, and utilizes the micro-thermal tube array plate with a specific structure to exchange heat with the cuboid battery pack, when the cuboid battery pack dissipates heat at high temperature, the evaporation section of the micro-thermal tube array plate is attached to the battery panel surface of the cuboid battery pack, the condensation section of the micro-thermal tube array plate extends out of the side surface of the cuboid battery pack, a heat exchange element is arranged on the condensation section of the micro-thermal tube array plate, and the condensation section of the micro-thermal tube array plate exchanges heat with the outside through the heat exchange element after absorbing the heat energy of the cuboid battery pack by the heat pipe effect; and when the cuboid battery pack is preheated at low temperature, a heat source such as an electric heating element is arranged at the evaporation section of the micro-heat tube array plate, the condensation section of the micro-heat tube array plate is attached to the battery panel surface of the cuboid battery pack, and the evaporation section of the micro-heat tube array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat tube array plate. The thermal management method provided by the invention can realize that the vehicle-mounted battery can reach the ideal heat dissipation temperature in a short time, can ensure the temperature of the vehicle-mounted battery to be uniform, has high heat transfer efficiency and good effect, and is easy to popularize and apply widely.
Drawings
Fig. 1a, 1b, 1c and 1d are schematic structural views of four preferred embodiments of the thermal management system for an electric vehicle-mounted rectangular parallelepiped battery according to the present invention.
Fig. 2 is a schematic top view of fig. 1a or 1b or 1c or 1 d.
Fig. 3a, 3b, 3c and 3d are schematic structural views of another four preferred embodiments of the thermal management system for an electric vehicle-mounted rectangular parallelepiped battery according to the present invention, and fig. 3e is a right-side partial enlarged view of fig. 3a or 3b or 3c or 3d, respectively.
Fig. 4 is a schematic diagram of the ventilation channel arrangement of the thermal management system for an electric vehicle-mounted rectangular parallelepiped battery according to the present invention.
The reference numerals in the figures are listed below:
1-cuboid battery/cuboid battery pack; 2-an evaporation section of the micro-heat pipe array plate when the cuboid battery pack dissipates heat; 3-a condensation section of the micro-heat pipe array plate when the cuboid battery pack dissipates heat; 4-a heat sink; 5-ventilation ducts; 6-a static pressure box; 7-resistance wire.
Detailed Description
The present invention will be described below with reference to the accompanying drawings.
The invention relates to a thermal management system for an electric vehicle-mounted cuboid battery pack, which comprises a micro-heat tube array plate, a heat exchange element (preferably a heat sink or a heat exchanger) and a heat source, wherein the heat source can be an electric heating element or a heated fluid medium (can be a thermal fluid medium with the temperature higher than the temperature of a battery, such as hot air or hot liquid) pipeline, and the electric heating element can be a resistance wire or an electric heating film; the micro-heat tube array plate is a plate-shaped structure which is formed by extrusion of metal materials and is internally provided with more than two micro-heat tube arrays arranged side by side, the equivalent diameter of each micro-heat tube in the micro-heat tube array is 0.2-2.5 mm, when the micro-heat tube array plate dissipates heat for a cuboid battery pack, the evaporation section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, the condensation section of the micro-heat tube array plate extends out of the side surface of the cuboid battery pack, the heat exchange element is arranged on the condensation section of the micro-heat tube array plate, the heat exchange element exchanges heat with the outside through the condensation section of the micro-heat tube array plate after the evaporation section of the micro-heat tube array plate absorbs the heat energy of the cuboid battery pack; when the cuboid battery pack is preheated, the heat source is arranged at the evaporation section of the micro-heat tube array plate, the condensation section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, and the evaporation section of the micro-heat tube array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat tube array plate.
Fig. 1a is a schematic structural diagram of a first embodiment of a thermal management system for an electric vehicle-mounted rectangular parallelepiped battery 1 according to the present invention, comprising a micro-thermal tube array plate (comprising an evaporation section of the micro-thermal tube array plate and a condensation section of the micro-thermal tube array plate), a heat sink 4 (one of the heat exchanging elements, typically a micro-heat sink) and a resistance wire 7. As shown in fig. 1a, in this embodiment, a micro-thermal tube array plate is disposed, and when the cuboid battery pack dissipates heat 1, the evaporation section 2 of the micro-thermal tube array plate is directly or indirectly attached to the battery surface of the cuboid battery 1, the direct attachment, that is, the evaporation section 2 of the micro-thermal tube array plate is directly and tightly attached to the battery surface of the cuboid battery 1, the indirect attachment can be implemented by filling a heat conducting medium, such as a heat-resistant and heat-conducting silica gel, between the evaporation section 2 of the micro-thermal tube array plate and the battery surface of the cuboid battery 1, so that the evaporation section 2 of the micro-thermal tube array plate and the battery surface of the cuboid battery 1 are tightly attached, the direct or indirect attachment of the two enhances the heat-dissipating surface contact, the condensation section 3 of the micro-thermal tube array plate extends to the outside of the side surface of the cuboid battery pack 1, and the condensation section 3 of the micro-thermal tube array plate is provided with a heat sink 4 as shown in fig. 2 to strengthen the heat sink, the heat sink 4 can be implemented by adopting welding molding or extrusion molding, the process is simple and easy, and the condensation section 4 and the condensation section 3 of the micro-thermal tube array plate can be filled with a heat-resistant and heat-conducting medium, such as a heat-conducting and heat-conducting silica gel is tightly attached to the heat-resistant and heat-conducting surface. When the heat dissipation of the cuboid battery pack is performed, the evaporation section 2 of the micro-heat pipe array plate tightly attached to the battery surface of the cuboid battery pack 1 absorbs the charge and discharge heat of the cuboid battery pack 1, and then evaporation and gasification are performed, so that a heat pipe effect occurs in each micro-heat pipe of the micro-heat pipe array, and then the condensation section 3 of the micro-heat pipe array plate exchanges heat with the outside through the heat sink 4. This embodiment is further provided with a resistance wire 7 (i.e. preferably an electrical heating element) wound around one end of the micro-thermal tube array plate as shown in fig. 1a, the resistance wire 7 not being activated when dissipating heat from the cuboid battery. When the cuboid battery pack is preheated, the resistance wire 7 starts to work, at the moment, the resistance wire 7 is arranged at the evaporation section of the micro-heat tube array plate (namely, one end of the micro-heat tube array plate, which is not provided with the heat sink 4), the condensation section of the micro-heat tube array plate (namely, the evaporation section 2 of the micro-heat tube array plate during heat dissipation) is attached to the battery plate surface of the cuboid battery pack 1, the evaporation section of the micro-heat tube array plate absorbs the heat energy of the resistance wire 7 and then generates a heat pipe effect, and then the condensation section of the micro-heat tube array plate (namely, the evaporation section 2 of the micro-heat tube array plate during heat dissipation) releases heat to the cuboid battery pack 1. Further, the evaporation section 2 of the micro-thermal tube array plate attached to the battery plate surface of the rectangular battery pack 1 when radiating the heat for the rectangular battery pack 1 is the condensation section of the micro-thermal tube array plate attached to the battery plate surface of the rectangular battery pack 1 when preheating the rectangular battery pack and is the middle section of the micro-thermal tube array plate, as shown in fig. 1a, both ends of the micro-thermal tube array plate extend out to the outside of the side surface of the rectangular battery pack 1, one end of the micro-thermal tube array plate is wound with the resistance wire 7, the other end is provided with the heat sink 4, and the arrangement of the resistance wire 7 does not affect the tight combination of the micro-thermal tube array plate and the battery plate surface of the rectangular battery pack 1.
Fig. 1b is a schematic structural diagram of a second embodiment of a thermal management system for an electric vehicle-mounted rectangular parallelepiped battery 1 of the present invention, comprising a micro-thermal tube array plate (including an evaporation section of the micro-thermal tube array plate and a condensation section of the micro-thermal tube array plate), a heat sink 4, and a resistance wire 7. As shown in fig. 1b, in this embodiment, a micro-thermal tube array plate is disposed and inclined upward, that is, the height of one end of the micro-thermal tube array plate, where the heat sink 4 is disposed (i.e., the condensation section 3 of the micro-thermal tube array plate during heat dissipation) is higher than the height of the portion of the micro-thermal tube array plate attached to the battery plate surface of the rectangular battery pack 1 (i.e., the evaporation section 2 of the micro-thermal tube array plate during heat dissipation), preferably, the micro-thermal tube array plate is disposed and inclined upward at an angle of not more than 10 ° (e.g., an optimal angle of 5 °) and the inclined arrangement of the micro-thermal tube array plate can partially compensate for the shortage of capillary force in the micro-thermal tube; the evaporation section 2 of the micro-thermal tube array plate is directly or indirectly attached to the battery surface of the cuboid battery 1 when the cuboid battery 1 dissipates heat, the direct attachment is that the evaporation section 2 of the micro-thermal tube array plate is directly attached to the battery surface of the cuboid battery 1, the indirect attachment can be that a heat conducting medium such as temperature-resistant heat conducting silica gel is filled between the evaporation section 2 of the micro-thermal tube array plate and the battery surface of the cuboid battery 1, so that the evaporation section 2 of the micro-thermal tube array plate is indirectly and tightly attached to the battery surface of the cuboid battery 1, the direct or indirect attachment of the two enhances the heat radiation surface contact, the condensation section 3 of the micro-thermal tube array plate extends out to the outside of the side surface of the cuboid battery 1, the heat sink 4 shown in fig. 2 is arranged on the condensation section 3 of the micro-thermal tube array plate to strengthen the heat radiation, the heat sink 4 can be formed by welding or extrusion, the process is simple and easy to realize, and a heat conducting medium such as silica gel or temperature-resistant silica gel can be filled between the condensation section 3 of the micro-thermal tube array plate to enable the two to be tightly attached to realize the maximum contact area. When the cuboid battery pack dissipates heat, the evaporation section 2 of the micro-thermal tube array plate tightly attached to the battery surface of the cuboid battery pack 1 absorbs charge and discharge heat of the cuboid battery pack 1, evaporation and vaporization are carried out, heat pipe effect occurs in the micro-thermal tube, heat is transferred to the condensation section 3 of the micro-thermal tube array plate, heat exchange is carried out between the condensation section 3 of the micro-thermal tube array plate and the outside through the heat sink 4, at the moment, evaporated and vaporized liquid working medium is condensed again to form liquid, the liquid flows back to the evaporation section 2 of the micro-thermal tube array plate under the action of tiny capillary pressure difference, the micro-thermal tube array plate is obliquely arranged upwards, for example, the optimal angle in the implementation is about 5 degrees, so that the liquid working medium which is condensed again by the condensation section 3 of the micro-thermal tube array plate flows back to the evaporation section 2 of the micro-thermal tube array plate more rapidly under the action of gravity effect, and the heat source is continuously and rapidly taken away in a circulating mode. This embodiment is further provided with a resistance wire 7 (i.e. preferably an electrical heating element) wound around one end of the micro-thermal tube array plate as shown in fig. 1b, the resistance wire 7 not being activated when dissipating heat from the cuboid battery. When the cuboid battery pack is preheated, the resistance wire 7 starts to work and is arranged at the evaporation section of the micro-heat tube array plate (namely, one end of the micro-heat tube array plate, which is not provided with the heat sink 4), the condensation section of the micro-heat tube array plate (namely, the evaporation section 2 of the micro-heat tube array plate during heat dissipation) is attached to the battery surface of the cuboid battery pack 1, the evaporation section of the micro-heat tube array plate absorbs the heat energy of the resistance wire 7 and then evaporates and gasifies to generate a heat pipe effect, the heat is transferred to the condensation section of the micro-heat tube array plate, the heat is released from the condensation section of the micro-heat tube array plate to the cuboid battery pack 1, the evaporated and gasified liquid working medium is condensed again to form the liquid which flows back to the evaporation section of the micro-heat tube array plate under the action of a tiny capillary pressure difference, the micro-heat tube array plate is obliquely arranged upwards, for example, the optimal angle in the implementation is 5 DEG, the liquid working medium which is re-condensed at the condensation section of the micro-thermal tube array plate flows back to the evaporation section of the micro-thermal tube array plate more quickly under the dual effects of gravity effect and capillary effect, thus the heat is continuously transferred to the cuboid battery pack by circulation, further explaining that the evaporation section 2 of the micro-thermal tube array plate which is attached to the battery surface of the cuboid battery pack 1 when the cuboid battery pack 1 dissipates heat is the condensation section of the micro-thermal tube array plate which is attached to the battery surface of the cuboid battery pack 1 when the cuboid battery pack is preheated and is the middle section of the micro-thermal tube array plate, as shown in figure 1b, both ends of the micro-thermal tube array plate extend out of the side surface of the cuboid battery pack 1, one end of the micro-thermal tube array plate is wound with an electric heating element-resistance wire 7, and the other end is provided with a heat sink 4, and the arrangement of the resistance wire 7 does not affect the tight combination of the micro-heating tube array plate and the battery plate surface of the cuboid battery pack 1.
Fig. 1c is a schematic structural diagram of a third embodiment of a thermal management system for an electric vehicle-mounted rectangular parallelepiped battery 1 according to the present invention, comprising a micro-thermal tube array plate (including an evaporation section of the micro-thermal tube array plate and a condensation section of the micro-thermal tube array plate), a heat sink 4 and a resistance wire 7. As shown in fig. 1c, in this embodiment, two micro-heat pipe array plates are provided, and the evaporation section 2 of the micro-heat pipe array plates is directly or indirectly attached to the battery surface of the rectangular battery 1 when radiating heat from the rectangular battery 1. The arrangement, advantages and effects of the components of the thermal management system shown in fig. 1c are the same as those of the thermal management system shown in fig. 1a, and in addition, two or more micro-heat pipe array plates arranged side by side can be arranged on the battery plate surface of the cuboid battery pack 1 under the condition of allowing, so that the heat exchange capability of the micro-heat pipe array plates can be fully exerted, and the heat dissipation efficiency and effect can be enhanced.
Fig. 1d is a schematic structural diagram of a fourth embodiment of a thermal management system for an electric vehicle-mounted rectangular parallelepiped battery 1 of the present invention, comprising a micro-thermal tube array plate (including an evaporation section of the micro-thermal tube array plate and a condensation section of the micro-thermal tube array plate), a heat sink 4, and a resistance wire 7. As shown in fig. 1d, two micro-heat tube array plates are arranged in this embodiment, and the micro-heat tube array plates are arranged in an upward inclined manner, that is, the height of one end of the micro-heat tube array plate, where the heat sink 4 is arranged (i.e., the condensation section 3 of the micro-heat tube array plate during heat dissipation) is higher than the height of the portion, where the micro-heat tube array plate is attached to the battery plate surface of the rectangular battery pack 1 (i.e., the evaporation section 2 of the micro-heat tube array plate during heat dissipation), preferably in an upward inclined manner at an angle of not more than 10 ° (as in the embodiment of fig. 1d, the optimal angle is 5 °), and the inclined arrangement of the micro-heat tube array plate can partially compensate for the shortage of capillary force in the micro-heat tube; the evaporation section 2 of the micro-heat pipe array plate is directly or indirectly attached to the battery surface of the cuboid battery 1 when radiating heat for the cuboid battery 1. The arrangement, advantages and effects of the components of the thermal management system shown in fig. 1d are the same as those of the thermal management system shown in fig. 1b, and in addition, two or more micro-heat pipe array plates arranged side by side can be arranged on the battery plate surface of the cuboid battery pack 1 under the condition of allowing, so that the heat exchange capability of the micro-heat pipe array plates can be fully exerted, and the heat dissipation efficiency and effect can be enhanced.
The thermal management system shown in fig. 1a, 1b, 1c and 1d realizes the close fitting of the micro-thermal tube array plate and the vehicle-mounted cuboid battery pack, avoids a series of problems caused by the fact that the vehicle-mounted battery pack needs to be in direct contact with a fluid medium (water or air) for heat exchange, and the existing vehicle-mounted battery thermal management system needs to be additionally provided with devices for tightly fitting the two heat exchange heat, reduces interface contact resistance, improves interface contact area, improves heat exchange efficiency and effect, and further cooperates with a heat sink arranged on a condensation section of the micro-thermal tube array plate for strengthening heat dissipation when heat dissipation is carried out, so that the vehicle-mounted cuboid battery pack can achieve ideal heat dissipation temperature in a shorter time; when the electric heating element is started during heating, the heat pipe effect naturally generated by the micro-heat pipe array plate is combined to achieve the required preheating effect, the system can be utilized to realize heat dissipation under the high-temperature condition, heating is performed under the low-temperature condition, the heat dissipation and heating functions are integrated, and the temperature uniformity of the vehicle-mounted cuboid battery pack is ensured. The thermal management system provided by the invention can also conveniently realize split installation of the vehicle-mounted battery pack, the micro-heat pipe array plate and the battery pack box body, provides a foundation for split design of the vehicle-mounted battery thermal management system, has the advantages of simple integrated structure, compact volume, high heat exchange efficiency and good effect, and can realize high-level protection of the battery pack box body.
Preferably, the system shown in fig. 1a, 1b, 1c and 1d may further adopt two sides of the evaporation section 2 of the micro-thermal tube array plate (for heat dissipation of the rectangular battery pack; because the condensation section of the micro-thermal tube array plate is used when preheating the rectangular battery pack) as shown in fig. 2 to be directly or indirectly attached to the battery boards of two adjacent rectangular batteries 1, fig. 2 only shows one micro-thermal tube array plate, or may also adopt a plurality of micro-thermal tube array plates, and two sides of the evaporation section of each micro-thermal tube array plate (for heat dissipation of the rectangular battery pack) are sequentially arranged on the battery boards of two adjacent rectangular batteries 1.
The micro heat pipe array plate in each embodiment may be a plate structure formed by extrusion molding of a metal material, and the micro heat pipe array plate structure has two or more micro heat pipe arrays arranged side by side, wherein the equivalent diameter of each micro heat pipe in the micro heat pipe array plate structure may be preferably set to be 0.2mm-2.5mm, the inner wall of each micro heat pipe is preferably provided with a capillary structure, the capillary structure is preferably a micro fin with enhanced heat transfer function or an inner concave micro groove running along the length direction of the micro heat pipe, and the size and structure of the micro fin are suitable for forming a capillary micro groove running along the length direction of the micro heat pipe with the inner wall of the micro heat pipe; of course, other forms of capillary structures may be employed; the two ends of each micro heat pipe are sealed and filled with liquid working medium, a heat pipe effect is naturally formed, the micro heat pipe array plate is integrally formed, the thickness of the micro heat pipe array plate can be preferably set to be 1.2mm-3.0mm, and the thickness of the heat sink is 1mm-2mm. Besides, the arrangement of the electric heating element may adopt a mode of winding the resistance wire 7 around one end of the micro heat pipe array plate as shown in fig. 1a, 1b, 1c or 1d, or arranging one or more slots in the direction parallel to the pipe length direction of the micro heat pipe array plate, as shown in four embodiments of fig. 3a, 3b, 3c and 3d, fig. 3e is a right-side partial enlarged schematic view of the embodiment shown in fig. 3a or 3b or 3c or 3d, the number of slots arranged in this embodiment is 4, and it is ensured that each slot and the micro heat pipe array are independent from each other, i.e. each micro heat pipe is not broken through, the electric heating element may also be selected as the resistance wire 7, and the resistance wire 7 is arranged in the slot to be prepared as a rectangular battery pack for preheating; furthermore, the electric heating element can be arranged by adopting an electric heating film, and the electric heating film is arranged at one end of the micro-heating tube array plate.
The thermal management system for an electric vehicle-mounted rectangular parallelepiped battery of the present invention may further include a heat transport passage (preferably, may be the air passage 5 shown in fig. 4) communicating with one end of the micro heat pipe array plate provided with a heat exchanging element (preferably, may be the heat sink 4 shown in fig. 1a, 1b, 1c and 1 d), the heat exchanging element being disposed along the direction of the heat transport passage; when the cuboid battery pack radiates heat, the evaporation section of the micro-thermal tube array plate absorbs the heat energy of the cuboid battery pack and then generates a heat tube effect, the condensation section of the micro-thermal tube array plate exchanges heat through the heat exchange element and is discharged through the heat transport channel, as shown in fig. 4, the micro-thermal tube array plate further comprises an air duct 5 and a static pressure box 6, the air duct 5 is communicated with one end of the micro-thermal tube array plate, which is provided with a heat sink 4, the static pressure box 6 is arranged below the air duct 5, the heat sink 4 is arranged along the direction of the air duct 5, when the cuboid battery pack 1 radiates heat, the evaporation section 2 of the micro-thermal tube array plate absorbs the heat energy of the cuboid battery pack 1 and then generates a heat tube effect, the condensation section 3 of the micro-thermal tube array plate exchanges heat through the heat sink 4 and is discharged through the air duct 5, the static pressure box 6 conveys cold air to the air duct 5, the condensation section 3 of the micro-thermal tube array plate is combined with the heat radiation of the heat sink 4, and an air outlet is arranged above the air duct 5, and the heat on the heat sink 4 is taken away directly, so that the effect of the cuboid battery pack is further enhanced; in addition, when the cuboid battery 1 set is preheated, the air supply temperature parameter of the static pressure box 6 can be changed to enable the cuboid battery 1 set to convey hot air to the ventilating duct 5, and the electric heating element such as a resistance wire arranged at one end of the micro-thermal tube array plate is combined, so that the hot air can effectively slow down a small part of heat lost by the heat sink 4 on the evaporation section (namely the condensation section 3 of the micro-thermal tube array plate during heat dissipation) of the micro-thermal tube array plate at the moment, and the preheating effect of the cuboid battery set is further enhanced. Further preferably, a controller may be further provided to adjust parameters such as a target temperature, an air supply speed, and an air supply temperature according to the charge/discharge rate of the rectangular battery pack.
The invention also relates to a thermal management method for the electric vehicle-mounted cuboid battery pack, which corresponds to the thermal management system for the electric vehicle-mounted cuboid battery pack, and can be understood as realizing the thermal management method for the electric vehicle-mounted cuboid battery pack, which is provided by the invention, and comprises the following specific steps of: the micro heat pipe array plate exchanges heat with the cuboid battery pack, the micro heat pipe array plate is of a plate-shaped structure which is formed by extrusion of metal materials and is provided with more than two micro heat pipe arrays arranged side by side, and the equivalent diameter of each micro heat pipe in the micro heat pipe array is 0.2mm-2.5mm; when the cuboid battery pack dissipates heat, the evaporation section of the micro-heat pipe array plate is attached to the battery panel surface of the cuboid battery pack, the condensation section of the micro-heat pipe array plate extends out of the side surface of the cuboid battery pack, a heat exchange element is arranged on the condensation section of the micro-heat pipe array plate, the evaporation section of the micro-heat pipe array plate absorbs heat energy of the cuboid battery pack and then generates a heat pipe effect, and the condensation section of the micro-heat pipe array plate exchanges heat with the outside through the heat exchange element; when the cuboid battery pack is preheated, a heat source is arranged at the evaporation section of the micro-heat tube array plate, the condensation section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, the evaporation section of the micro-heat tube array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat tube array plate.
Preferably, when the rectangular battery pack is preheated, the heat source adopted can be an electric heating element, the electric heating element adopted can be a resistance wire or an electric heating film, and referring to fig. 1a, 1b, 1c and 1d, both ends of the micro-thermal tube array plate extend out of the side surface of the rectangular battery pack, one end of the micro-thermal tube array plate is provided with a heat exchange element, the other end is wound with the resistance wire or the electric heating film (the resistance wire 7 is shown in fig. 1a, 1b, 1c and 1 d), and the middle section of the micro-thermal tube array plate is attached to the battery panel surface of the rectangular battery pack to be the evaporation section of the micro-thermal tube array plate when the rectangular battery pack is used for radiating heat and the condensation section of the micro-thermal tube array plate when the rectangular battery pack is preheated; or the heat source is an electric heating element, and the electric heating element is a resistance wire, and referring to fig. 3a, 3b, 3c, 3d and 3e, one or more slots are arranged on the micro heat pipe array plate along the length direction of the tube parallel to the micro heat pipe array, each slot is independent to the micro heat pipe array, that is, the slots cannot break down each micro heat pipe, the resistance wire is arranged in the slot, and the arrangement of the resistance wire does not affect the tight combination of the micro heat pipe array plate and the battery plate surface of the cuboid battery pack.
In addition, one end of the micro-heat pipe array plate provided with the heat exchange element is communicated with a heat transport channel, namely an air channel, a static pressure box is arranged below the air channel, the heat exchange element is arranged along the direction of the air channel, and referring to fig. 4, when the cuboid battery pack radiates heat, the static pressure box conveys cold air to the air channel to further strengthen the radiating effect of the cuboid battery pack; when the cuboid battery pack is preheated, the air supply temperature parameter of the static pressure box is changed to enable the cuboid battery pack to convey hot air to the ventilating duct, a small part of heat lost by a heat sink on an evaporation section of the micro-thermal tube array plate (namely a condensation section of the micro-thermal tube array plate during heat dissipation) is slowed down, and the preheating effect of the cuboid battery pack is further enhanced.
The micro heat pipe array plate in the heat management method may be a plate structure formed by extruding metal material and having two or more micro heat pipe arrays arranged side by side, the equivalent diameter of each micro heat pipe in the micro heat pipe array may be preferably set to 0.2mm-2.5mm, the inner wall of each micro heat pipe may be preferably provided with a capillary structure, the capillary structure may be preferably a micro fin with enhanced heat transfer function or an inner concave micro groove running along the length direction of the micro heat pipe, and the size and structure of the micro fin are suitable for forming a capillary micro groove running along the length direction of the micro heat pipe with the inner wall of the micro heat pipe; the two ends of each micro heat pipe are sealed and filled with liquid working medium to naturally form a heat pipe effect, the micro heat pipe array plate is integrally formed, the thickness of the micro heat pipe array plate can be preferably set to be 2.0mm-3.0mm, and the thickness of the heat sink is 1mm-2mm; when the cuboid battery pack dissipates heat, the two side surfaces of the evaporation section of the micro-heat pipe array plate are respectively and directly or indirectly attached to the battery surfaces of two adjacent cuboid batteries, and the micro-heat pipe array plate is obliquely arranged upwards and has an inclination angle not larger than 10 degrees (preferably about 5 degrees), and the height of one end of the micro-heat pipe array plate provided with the heat sink is higher than the height of the part of the micro-heat pipe array plate attached to the battery surfaces of the cuboid battery pack, as shown in fig. 1b, 1d, 3b and 3 d.
It should be noted that the above-described embodiments will enable those skilled in the art to more fully understand the invention, but do not limit it in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that the present invention may be modified or equivalent, and in all cases, all technical solutions and modifications which do not depart from the spirit and scope of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The heat management system for the cuboid battery pack is characterized by comprising a micro heat pipe array plate, a heat exchange element and a heat source, wherein the micro heat pipe array plate is of a plate-shaped structure which is formed by extrusion of a metal material and is provided with more than two micro heat pipe arrays arranged side by side, the equivalent diameter of each micro heat pipe in the micro heat pipe array is 0.2-2.5 mm, and a capillary structure is arranged in the inner wall of each micro heat pipe;
when the heat dissipation is carried out on the cuboid battery pack, the evaporation section of the micro-heat pipe array plate is attached to the battery panel surface of the cuboid battery pack, the condensation section of the micro-heat pipe array plate extends out of the side surface of the cuboid battery pack, the heat exchange element is arranged on the condensation section of the micro-heat pipe array plate, the evaporation section of the micro-heat pipe array plate absorbs the heat energy of the cuboid battery pack and then generates a heat pipe effect, and the condensation section of the micro-heat pipe array plate exchanges heat with the outside through the heat exchange element; when the cuboid battery pack is preheated, the heat source is arranged at the evaporation section of the micro-heat pipe array plate, the condensation section of the micro-heat pipe array plate is attached to the battery plate surface of the cuboid battery pack, and the evaporation section of the micro-heat pipe array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat pipe array plate;
The evaporator section of the micro-heat tube array plate attached to the battery plate surface of the cuboid battery pack when the cuboid battery pack dissipates heat is the condensation section of the micro-heat tube array plate attached to the battery plate surface of the cuboid battery pack when the cuboid battery pack is preheated, the middle section of the micro-heat tube array plate is arranged, two ends of the micro-heat tube array plate extend out of the side surface of the cuboid battery pack, a heat source is arranged at one end of the micro-heat tube array plate, and a heat exchange element is arranged at the other end of the micro-heat tube array plate; the outer side of the micro heat pipe array plate is provided with one or more grooves along the pipe length direction parallel to the micro heat pipe array, the grooves are mutually independent with the micro heat pipe array, the heat source is a resistance wire, and the resistance wire is arranged in the grooves; when the cuboid battery pack dissipates heat, the two side surfaces of the evaporation section of the micro-heat pipe array plate are respectively and directly or indirectly attached to the battery plate surfaces of two adjacent cuboid batteries; the micro-heat tube array plate is arranged in an upward inclined mode, and the height of one end, provided with the heat exchange element, of the micro-heat tube array plate is higher than the height of the part, attached to the battery plate surface of the cuboid battery pack, of the micro-heat tube array plate.
2. The thermal management system of claim 1, wherein the heat exchange element is a heat sink or a heat exchanger.
3. The thermal management system according to claim 1 or 2, further comprising a heat transport channel communicating with an end of the micro heat pipe array plate provided with a heat exchanging element, the heat exchanging element being provided along the direction of the heat transport channel; when the heat dissipation is carried out on the cuboid battery pack, the evaporation section of the micro-heat pipe array plate absorbs the heat energy of the cuboid battery pack, then the heat pipe effect is generated, and the heat exchange is carried out on the condensation section of the micro-heat pipe array plate through the heat exchange element and the heat is discharged through the heat transport channel.
4. The thermal management system of claim 3, wherein the heat transport channel is an air duct, and cold air is delivered into the air duct when radiating heat from the rectangular battery pack; and when the cuboid battery pack is preheated, hot air is conveyed in the ventilating duct.
5. The thermal management system of claim 1, wherein the micro-thermal tube array plate has a thickness of 1.2mm-3.0mm, a heat transfer medium is filled between the micro-thermal tube array plate and the rectangular battery pack, and a heat transfer medium is filled between the micro-thermal tube array plate and the heat exchange element;
and/or the capillary structure is a micro fin with a heat transfer enhancement function or an inward concave micro groove running along the length direction of the micro heat pipe, which are arranged in the inner wall of each micro heat pipe, and the size and the structure of the micro fin are suitable for forming a capillary micro groove running along the length direction of the micro heat pipe with the inner wall of the micro heat pipe.
6. The heat management method for the cuboid battery pack is characterized in that heat exchange is carried out between a micro heat pipe array plate and the cuboid battery pack, the micro heat pipe array plate is of a plate-shaped structure which is formed by extrusion of a metal material and is provided with more than two micro heat pipe arrays arranged side by side, and the equivalent diameter of each micro heat pipe in the micro heat pipe array is 0.2-2.5 mm; when the heat dissipation is carried out on the cuboid battery pack, the evaporation section of the micro-heat pipe array plate is attached to the battery panel surface of the cuboid battery pack, the condensation section of the micro-heat pipe array plate extends out of the side surface of the cuboid battery pack, a heat exchange element is arranged on the condensation section of the micro-heat pipe array plate, the evaporation section of the micro-heat pipe array plate absorbs the heat energy of the cuboid battery pack and then generates a heat pipe effect, and the condensation section of the micro-heat pipe array plate exchanges heat with the outside through the heat exchange element; when the cuboid battery pack is preheated, a heat source is arranged at an evaporation section of the micro-heat pipe array plate, a condensation section of the micro-heat pipe array plate is attached to a battery plate surface of the cuboid battery pack, and the evaporation section of the micro-heat pipe array plate absorbs heat energy of the heat source and then generates a heat pipe effect, and then the heat is released to the cuboid battery pack from the condensation section of the micro-heat pipe array plate;
The heat source adopted is an electric heating element, the electric heating element adopted is a resistance wire or an electric heating film, both ends of the micro-heat tube array plate extend out of the side surface of the cuboid battery pack, one end of the micro-heat tube array plate is provided with a heat exchange element, the other end of the micro-heat tube array plate is wound with the resistance wire or the electric heating film, the middle section of the micro-heat tube array plate is attached to the battery plate surface of the cuboid battery pack, and the middle section is an evaporation section of the micro-heat tube array plate when the cuboid battery pack dissipates heat and a condensation section of the micro-heat tube array plate when the cuboid battery pack is preheated; or, the adopted heat source is an electric heating element, the electric heating element is a resistance wire, one or more grooves are formed in the micro heat pipe array plate along the length direction of the pipe parallel to the micro heat pipe array, the grooves and the micro heat pipe array are mutually independent, and the resistance wire is arranged in the grooves;
when the cuboid battery pack dissipates heat, the two side surfaces of the evaporation section of the micro-heat pipe array plate are respectively and directly or indirectly attached to the battery plate surfaces of two adjacent cuboid batteries, and the micro-heat pipe array plate is obliquely upwards arranged at an inclination angle of not more than 10 degrees, so that the height of one end of the micro-heat pipe array plate, provided with a heat exchange element, is higher than the height of the part, attached to the battery plate surfaces of the cuboid battery pack, of the micro-heat pipe array plate; the thickness of the micro heat pipe array plate is 1.2mm-3.0mm.
7. The heat management method according to claim 6, wherein the end of the micro heat pipe array plate provided with the heat exchange element is communicated with the air duct, a static pressure box is arranged below the air duct, the heat exchange element is arranged along the air duct, and when the cuboid battery pack dissipates heat, the static pressure box conveys cold air to the air duct; when the rectangular battery pack is preheated, the static pressure box conveys hot air to the ventilating duct.
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| CN106973556B (en) * | 2017-05-09 | 2019-04-09 | 重庆路格科技有限公司 | Navigator with heat sinking function |
| CN111370805B (en) * | 2020-02-20 | 2021-06-11 | 上海卫星工程研究所 | Lithium battery temperature control method adopting non-independent thermal design |
| CN113437385A (en) * | 2021-05-11 | 2021-09-24 | 哈尔滨理工大学 | Electric automobile blade battery thermal management system |
| CN113540501A (en) * | 2021-07-06 | 2021-10-22 | 天津大学 | Thermal management system and control method of high-temperature proton exchange membrane fuel cell |
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