A stacked automobile temperature difference power generation device with integrated heat pipe

Abstract

The invention discloses a stacked automobile temperature difference power generation device with integrated heat pipes, which relates to the field of thermoelectric conversion. The stacked automobile temperature difference power generation device with integrated heat pipes comprises: an exhaust gas inlet end cover for inputting engine exhaust gas; compared with the prior art, the invention has the following beneficial effects: the invention comprises a hot-end heat pipe and a cold-end heat pipe, wherein the hot-end heat pipe is divided into zones according to the temperature drop of the exhaust gas, and heat pipes with different working temperatures are matched respectively to achieve efficient heat transfer between the high-temperature exhaust gas and the hot-end flat plate, the cold-end heat pipe is connected to the cold-end flat plate and the radiator, and the heat is taken away by the coolant in the radiator to achieve a large temperature difference between the two ends of the thermoelectric module; in addition, the hot-end flat plate and the cold-end flat plate both adopt a hexagonal design and are assembled through a stacked design, thereby improving the space utilization rate of the automobile temperature difference power generation device, overcoming the disadvantage of poor radial heat conductivity of the traditional structure, greatly improving the output power, and promoting the development and application of the automobile temperature difference power generation device.

Description

Technical Field

[0001] The present invention relates to the field of thermoelectric conversion, and more particularly to a stacked automotive thermoelectric power generation device integrated with heat pipes. Background Art

[0002] In recent years, due to the increasingly serious energy and environmental problems caused by the overuse of fossil fuels, various countries have successively promulgated corresponding policies to support the development of new energy technologies and reduce the use of fossil fuels. Thermoelectric conversion technology is one of the new energy technologies with great application prospects. It can directly convert heat energy into electrical energy without generating noise and pollution, and has achieved preliminary applications in fields such as aerospace, wearable devices, and waste heat recovery.

[0003] An automotive thermoelectric power generation device utilizes the thermoelectric effect of thermoelectric modules to recover and utilize the heat in the engine exhaust gas and convert it into electrical energy. The generated electrical energy can be used to supply power to in-vehicle electrical appliances or stored in the vehicle-mounted battery.

[0004] However, the space in the vehicle exhaust system is limited, and the structural size of the existing automotive thermoelectric power generation device is too large. Only a limited number of thermoelectric modules can be arranged in the narrow space, and the heat energy of the engine exhaust gas cannot be effectively utilized. In addition, when the exhaust gas flows through the automotive thermoelectric power generation device, its radial heat conduction performance is poor, resulting in the inability to effectively transfer heat from the exhaust gas to the thermoelectric modules and a low output power. How to arrange more thermoelectric modules in a limited space and improve the radial heat conduction ability of the thermoelectric power generation device is the key to promoting the wide application of thermoelectric technology in the field of automotive exhaust waste heat recovery. Summary of the Invention

[0005] The purpose of the present invention is to provide a stacked automotive thermoelectric power generation device integrated with heat pipes to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A stacked automotive thermoelectric power generation device integrated with heat pipes, comprising:

[0008] An exhaust gas inlet end cap for inputting engine exhaust gas;

[0009] A cold-end flat plate for equalizing the temperature input by the cold-end heat pipe;

[0010] A hot-end flat plate for equalizing the temperature input by the hot-end heat pipe;

[0011] Thermoelectric modules for converting and generating electrical energy according to the temperature difference between the cold-end flat plate and the hot-end flat plate;

[0012] Cold-end heat pipes for transferring heat to the cold-end flat plate;

[0013] A radiator for accelerating the heat dissipation of the cold-end flat plate through a coolant;

[0014] A hot-end heat pipe for transferring heat to the hot-end flat plate; it is partitioned according to the exhaust gas temperature, and the heat pipe temperature parameters in different regions are different to match the heat loss during the exhaust gas transmission process;

[0015] An exhaust gas outlet end cover for discharging the engine exhaust gas;

[0016] Both the hot-end flat plate and the cold-end flat plate are hexagonal structures. The thermoelectric modules are located on the six sides of the hot-end flat plate and the cold-end flat plate and are sandwiched between them. The number of hot-end flat plates is M, the number of cold-end flat plates is M + 1, the number of thermoelectric modules is 12*M. The evaporation end of the cold-end heat pipe is embedded in the cold-end flat plate, the condensation end of the cold-end heat pipe is fixedly connected to the radiator, and the condensation end of the hot-end heat pipe is embedded in the hot-end flat plate.

[0017] As a further solution of the present invention: The stacked automotive thermoelectric power generation device with integrated heat pipes as a whole presents a stacked structure, including N layers of units, N = M. The first layer of units is close to the exhaust gas inlet end cover, and the Nth layer of units is close to the exhaust gas outlet end cover. Each layer of units includes 1 hot-end flat plate, 12 thermoelectric modules and 2 cold-end flat plates; among them, the ith layer of units and the (i + 1)th layer of units share a cold-end flat plate, i ≤ N - 1, and the number of layers N is equal to the length of the placement space of the automotive exhaust system divided by the height H of a single layer of units.

[0018] As a further solution of the present invention: The hot-end flat plate includes 6 platforms, and each platform has a square groove with a thickness of 0.1 - 1 mm. The size of the groove is equal to the size of the thermoelectric module, and the thermoelectric module is embedded in the square groove; along the radial direction, 2 round holes are provided on each platform, the diameter of the round hole is equal to the diameter of the hot-end heat pipe, and the distance from the center position of the round hole to the right boundary of the groove is The distance from the left boundary of the groove is wherein, L is equal to the length of the thermoelectric module.

[0019] As a further solution of the present invention: The inner side of the hot-end flat plate has a baffle, and the height of the baffle is K, The inscribed circle diameter of the (i + 1)th layer of hot-end flat plates is equal to the inscribed circle diameter of the ith layer of hot-end flat plates minus the thickness of the baffle; the condensation end of the hot-end heat pipe is embedded inside the round hole of the hot-end flat plate and is flush with the outer outlet of the round hole, and the evaporation end is placed in the exhaust gas flow channel; in addition, the (i + 1)th layer of hot-end flat plates and the ith layer of hot-end flat plates are assembled upside down, and the mutual interlacing between the baffles forms a sealed environment for the exhaust gas flow channel, and correspondingly, the (i + 1)th layer of hot-end heat pipes and the ith layer of hot-end heat pipes are interlaced with each other to improve the heat exchange between the exhaust gas and the hot-end heat pipes.

[0020] As a further solution of the present invention: the hot-end heat pipe is processed by zoning according to the ambient temperature. Along the direction from the tail gas inlet to the tail gas outlet, it is successively divided into a high-temperature zone, a medium-temperature zone, and a low-temperature zone, that is, the first layer to the layer is the high-temperature zone, the layer to layer is the medium-temperature zone, and the layer to the Nth layer is the low-temperature zone; heat pipes with corresponding temperature parameters are selected according to the minimum operating temperature of different temperature zones, which are divided into high-temperature zone heat pipes, medium-temperature zone heat pipes, and low-temperature zone heat pipes, and they are assembled with the corresponding hot-end flat plates.

[0021] As a further solution of the present invention: the cold-end flat plate includes 6 platforms, and each platform has a square groove with a thickness of 0.1 - 1 mm. The size of the groove is equal to the size of the thermoelectric module, and the other end of the thermoelectric module is embedded in the square groove. The position of the groove is consistent with the position of the groove on the hot-end flat plate; 2 round holes are dug on the side of each platform, and the diameter of the round hole is equal to the diameter of the cold-end heat pipe; the evaporation end of the cold-end heat pipe is embedded in the round hole. In addition, the inscribed circle diameter of the cold-end flat plate is larger than the maximum inscribed circle diameter of the hot-end flat plate to prevent heat loss caused by contact between the cold-end flat plate and the hot-end flat plate.

[0022] As a further solution of the present invention: the evaporation end of the cold-end heat pipe is located inside the round hole of the cold-end flat plate and is flush with one side outlet of the round hole, and the condensation end is embedded inside the radiator; thus, the operating temperature of the cold-end heat pipe is equal to the temperature of the coolant.

[0023] As a further solution of the present invention: the radiator has a coolant flow channel inside, and the flow direction of the coolant is opposite to the flow direction of the tail gas. Round holes are distributed on both sides of the coolant flow channel, and the condensation end of the cold-end heat pipe is embedded in the round hole, and the position of the round hole is consistent with the position of the round hole on the cold-end flat plate.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention includes a hot-end heat pipe and a cold-end heat pipe. Among them, the hot-end heat pipe is zoned according to the temperature drop of the tail gas, and heat pipes with different operating temperatures are respectively matched to achieve efficient heat transfer between the high-temperature tail gas and the hot-end flat plate. The cold-end heat pipe is connected to the cold-end flat plate and the radiator, and the heat is taken away by the coolant in the radiator to achieve a large temperature difference at both ends of the thermoelectric module; in addition, both the hot-end flat plate and the cold-end flat plate adopt a hexagonal design and are assembled by a stacked design, improving the space utilization rate of the automotive thermoelectric power generation device and overcoming the disadvantage of poor radial heat conduction ability of the traditional structure, and the output power is greatly improved, promoting the development and application of the automotive thermoelectric power generation device. Description of the Drawings

[0025] Figure 1 It is the front view of the stacked automotive thermoelectric power generation device with integrated heat pipes.

[0026] Figure 2 Top view of a stacked automotive thermoelectric power generation device integrated with heat pipes.

[0027] Figure 3 Left view of a stacked automotive thermoelectric power generation device integrated with heat pipes.

[0028] Figure 4 Front view of the assembled hot-end flat plate and hot-end heat pipes.

[0029] Figure 5 Top view of the assembled hot-end flat plate and hot-end heat pipes.

[0030] Figure 6 Front view of the assembled cold-end flat plate and cold-end heat pipes.

[0031] Figure 7 Top view of the assembled cold-end flat plate and cold-end heat pipes.

[0032] Wherein: 1 - exhaust gas inlet end cap, 2 - cold-end flat plate, 3 - hot-end flat plate, 4 - thermoelectric module, 5 - cold-end heat pipe, 6 - radiator, 7 - hot-end heat pipe, 8 - exhaust gas outlet end cap. Specific implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to Figures 1 to 7 , a stacked automotive thermoelectric power generation device integrated with heat pipes, comprising:

[0035] An exhaust gas inlet end cap 1 for inputting engine exhaust gas;

[0036] A cold-end flat plate 2 for equalizing the temperature input by the cold-end heat pipe 5;

[0037] A hot-end flat plate 3 for equalizing the temperature input by the hot-end heat pipe 7;

[0038] A thermoelectric module 4 for converting and generating electric energy according to the temperature difference between the cold-end flat plate 2 and the hot-end flat plate 3;

[0039] A cold-end heat pipe 5 for transferring heat to the cold-end flat plate 2;

[0040] A radiator 6 for accelerating the heat dissipation of the cold-end flat plate 2 through a coolant;

[0041] The hot-end heat pipe 7 is used to transfer heat to the hot-end flat plate 3; it is partitioned according to the exhaust gas temperature, and the heat pipe temperature parameters in different regions are different to match the heat dissipation during the exhaust gas transmission process;

[0042] The exhaust gas outlet end cover 8; it is used to discharge the engine exhaust gas;

[0043] Both the hot-end flat plate 3 and the cold-end flat plate 2 are hexagonal structures. The thermoelectric modules 4 are located on the six sides of the hot-end flat plate 3 and the cold-end flat plate 2 and are sandwiched between them. The number of hot-end flat plates 3 is M, the number of cold-end flat plates 2 is M + 1, and the number of thermoelectric modules 4 is 12 * M. The evaporation end of the cold-end heat pipe 5 is embedded in the cold-end flat plate 2, the condensation end of the cold-end heat pipe 5 is fixedly connected to the radiator 6, and the condensation end of the hot-end heat pipe 7 is embedded in the hot-end flat plate 3.

[0044] In this embodiment: Please refer to Figures 1 to 7 The laminated automotive thermoelectric power generation device with integrated heat pipes as a whole presents a laminated structure, including N layers of units, N = M. The first layer of units is close to the exhaust gas inlet end cover 1, and the Nth layer of units is close to the exhaust gas outlet end cover 8. Each layer of units includes 1 hot-end flat plate 3, 12 thermoelectric modules 4, and 2 cold-end flat plates 2; among them, the ith (i = 1, 2, 3,..., N - 1) layer of units shares a cold-end flat plate 2 with the (i + 1)th layer of units, and the number of layers N is equal to the length of the placement space of the automotive exhaust system divided by the height H of a single-layer unit.

[0045] Step 1, determine the number of layers N of the laminated automotive thermoelectric power generation device with integrated heat pipes. Taking a traditional sedan with a displacement of 1.8L as an example, the length of the placement space of the automotive exhaust system is 540 mm, and the height of a single-layer unit is 23.6 mm, that is, H = 23.6 mm, then the number of layers N is equal to 22; among them, the height of the hot-end flat plate 3 and the cold-end flat plate 2 can be set to 9 mm, and the height of the thermoelectric module 4 is set to 3.8 mm.

[0046] Step 2, determine the basic structural parameters of the hot-end flat plate 3. Taking a thermoelectric module 4 with a length and width of 40 mm and a heat pipe with a diameter of 6 mm as an example, that is, L = 40 mm; the hot-end flat plate 3 includes 6 platforms, and each platform has a square groove with a thickness of 0.5 mm. The size of the groove is equal to the size of the thermoelectric module 4, that is, the length and width are both 40 mm, used to limit the position of the thermoelectric module 4; in addition, 2 round holes are drilled on each platform along the radial direction. The diameter of the round holes is equal to the diameter of the hot-end heat pipe 7, that is, 6 mm. The center position of the round holes is 8 mm away from the right boundary of the groove and 12 mm away from the left boundary of the groove.

[0047] Step 3, determine the assembly parameters of the hot-end flat plate 3. The inner side of the hot-end flat plate 3 has a baffle, and the height of the baffle is equal to 8 mm, that is The thickness is 2 mm; Given that the inner diameter of the engine exhaust pipe is 50 mm, and to ensure sufficient heat pipe layout space, the inscribed circle diameter of the i-th layer of the hot-end flat plate 3 is taken as 86 mm, then the inscribed circle diameter of the (i + 1)-th layer of the hot-end flat plate 3 is 84 mm; The condensation end of the hot-end heat pipe 7 is placed inside the round hole of the hot-end flat plate 3 and is flush with the outer outlet of the round hole, and the evaporation end is placed in the tail gas flow channel; In addition, the (i + 1)-th layer of the hot-end flat plate 3 and the i-th layer of the hot-end flat plate 3 are assembled upside down, and the mutual staggering between the baffles forms a sealed environment for the tail gas flow channel. Correspondingly, the (i + 1)-th layer of the hot-end heat pipe 7 and the i-th layer of the hot-end heat pipe 7 are staggered with each other to improve the heat exchange between the tail gas and the hot-end heat pipe 7.

[0048] Step 4, determine the partition parameters of the hot-end heat pipe 7. Assume that the tail gas inlet temperature is 400 °C, the temperature drop is 120 °C, and the temperature drops uniformly along the tail gas flow; The hot-end heat pipe 7 is partitioned according to the temperature environment it is in. Along the direction from the tail gas inlet to the tail gas outlet, it is successively the high-temperature zone, the medium-temperature zone, and the low-temperature zone. That is, the 1st to 7th layers are the high-temperature zone, the 7th to 14th layers are the medium-temperature zone, and the 14th to 22nd layers are the low-temperature zone; Heat pipes with corresponding temperature parameters are selected according to the minimum operating temperature of different temperature zones, and are divided into high-temperature zone heat pipes, medium-temperature zone heat pipes, and low-temperature zone heat pipes. That is, the operating temperature of the high-temperature zone heat pipe is 360 °C, the operating temperature of the medium-temperature zone heat pipe is 320 °C, and the operating temperature of the low-temperature zone heat pipe is 280 °C, and they are assembled with the corresponding hot-end flat plate 3.

[0049] Step 5, determine the basic structural parameters of the cold-end flat plate 2, taking the cold-end heat pipe 5 with a diameter of 6 mm as an example; The cold-end flat plate 2 contains 6 platforms, and each platform has a square groove with a thickness of 0.5 mm. The size of the groove is equal to the size of the thermoelectric module 4, that is, both the length and width are 40 mm, used to limit the position of the thermoelectric module 4. The position of the groove is consistent with the position of the groove of the hot-end flat plate 3; 2 round holes are drilled on the side of each platform, and the diameter of the round hole is equal to the diameter of the cold-end heat pipe 5, that is, 6 mm; In addition, the inscribed circle diameter of the cold-end flat plate 2 is larger than the maximum inscribed circle diameter of the hot-end flat plate 3, that is, larger than 86 mm. The inscribed circle diameter of the cold-end flat plate 2 is taken to be different from the maximum inscribed circle diameter of the hot-end flat plate 3 by the thickness of the baffle of the hot-end flat plate 3. That is, the inscribed circle diameter of the cold-end flat plate 2 is 88 mm, to prevent heat loss caused by the contact between the cold-end flat plate 2 and the hot-end flat plate 3 (the inscribed circle diameters of the i-th layer of the hot-end flat plate and the (i + 1)-th layer of the hot-end flat plate differ by 2 mm, that is, the thickness of the baffle. The value here cannot be too small to prevent contact due to assembly errors; nor can it be too large to prevent affecting the layout of the thermoelectric generation module. It should be in the range of 1 - 3 mm, so 2 mm is taken).

[0050] Step 6, determine the basic parameters of the cold-end heat pipe 5, taking the engine coolant temperature of 90°C as an example; the evaporation end of the cold-end heat pipe 5 is located inside the round hole of the cold-end flat plate 2 and is flush with the outlet on one side of the round hole, and the condensation end of the cold-end heat pipe 5 is inserted into the radiator 6; in addition, the operating temperature of the cold-end heat pipe 5 is equal to the coolant temperature, that is, 90°C.

[0051] Step 7, determine the basic parameters of the radiator 6. The radiator 6 has a coolant flow channel inside, and the coolant flow direction is opposite to the exhaust gas flow direction. Round holes are distributed on both sides of the coolant flow channel for connection with the cold-end heat pipe 5, and the positions of the round holes are consistent with the positions of the round holes on the cold-end flat plate 2.

[0052] The automotive thermoelectric power generation device with integrated heat pipes given in this example includes a total of 22 hot-end flat plates 3, 23 cold-end flat plates 2, 264 thermoelectric modules 4, 42 hot-end heat pipes 7 in the high-temperature area, 42 hot-end heat pipes 7 in the medium-temperature area, 48 hot-end heat pipes 7 in the low-temperature area, and 132 cold-end heat pipes 5. In order to improve the heat transfer capacity of the device and reduce the weight, both the hot-end flat plate 3 and the cold-end flat plate 2 are made of aluminum material, and both the hot-end heat pipe 7 and the cold-end heat pipe 5 are made of copper heat pipes. The entire device is assembled in a stacked manner through bolts and other components, and is connected to the automotive exhaust pipe through the inlet end cover and the outlet end cover.

[0053] The working principle of the present invention is as follows: Engine exhaust gas is input from the exhaust gas inlet end cover 1, passes through the multi-layer structure and is discharged from the exhaust gas outlet end cover 8. The exhaust gas transfers heat through the hot-end heat pipe 7, and the hot-end heat pipe 7 transmits this heat to the hot-end flat plate 3. At the same time, the cold-end flat plate 2 cooperates with the cold-end heat pipe 5 and the radiator 6, making the temperature of the cold-end flat plate 2 relatively low. As a result, the temperature difference between the hot-end flat plate 3 and the cold-end flat plate 2 output to the thermoelectric module 4 is relatively large, and electric energy is generated according to the thermoelectric effect; as the exhaust gas passes through the hot-end heat pipe 7, the temperature gradually decreases. Therefore, the temperature parameters of the hot-end heat pipes 7 selected in the lower layer also decrease accordingly and match the corresponding hot-end platforms, making full use of the exhaust gas.

[0054] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0055] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stacked automotive temperature difference power generation device with integrated heat pipe, characterized in that: The stacked automobile temperature difference power generation device with integrated heat pipe comprises: An exhaust gas inlet end cover is used to input engine exhaust gas; The cold end plate is used to equalize the temperature input by the cold end heat pipe; The hot end plate is used to equalize the temperature input by the hot end heat pipe; Thermoelectric module, used to convert and generate electrical energy according to the temperature difference between the cold end plate and the hot end plate; The cold end heat pipe is used to transfer heat to the cold end plate; Radiator, used to accelerate the heat dissipation of the cold end plate through coolant; The hot end heat pipe is used to transfer heat to the hot end plate. It is divided into zones according to the exhaust gas temperature. The temperature parameters of the heat pipes in different zones are different to match the heat loss during the exhaust gas transmission process. Exhaust gas outlet end cover; used to discharge engine exhaust gas; The hot end plate and the cold end plate are both hexagonal structures. The thermoelectric module is located on the six sides of the hot end plate and the cold end plate and is sandwiched between the two. The number of hot end plates is M, the number of cold end plates is M+1, the number of thermoelectric modules is 12*M, the evaporation end of the cold end heat pipe is embedded in the cold end plate, the condensation end of the cold end heat pipe is fixedly connected to the radiator, and the condensation end of the hot end heat pipe is embedded in the hot end plate; The stacked automobile temperature difference power generation device with integrated heat pipe has a stacked structure as a whole, including N Layer unit, N=M , the first layer unit is close to the exhaust gas inlet cover, N The layer unit is close to the exhaust outlet cover. Each layer unit includes 1 hot end plate, 12 thermoelectric modules and 2 cold end plates. Among them, the i-th layer unit and the i+1-th layer unit share a cold end plate, i≤ N -1, number of layers N Equal to the length of the space available for the vehicle exhaust system divided by the height of the single-story unit H ; The inner side of the hot end plate has a baffle, the height of the baffle is K , The inscribed circle diameter of the i+1th hot end flat plate is equal to the inscribed circle diameter of the ith hot end flat plate minus the thickness of the baffle; the condensing end of the hot end heat pipe is embedded in the circular hole of the hot end flat plate and is flush with the outer outlet of the circular hole, and the evaporating end is placed in the exhaust gas flow channel; the i+1th hot end flat plate and the ith hot end flat plate are assembled upside down, and the baffles are interlaced to form a sealed environment for the exhaust gas flow channel.

2. The stacked automobile temperature difference power generation device with integrated heat pipe according to claim 1, characterized in that: The hot end plate comprises 6 platforms, and each platform has a square groove with a thickness of 0.1-1 mm. The size of the groove is equal to the size of the thermoelectric module, and the thermoelectric module is embedded in the square groove. In the radial direction, each platform is provided with 2 circular holes, the diameter of the circular hole is equal to the diameter of the hot end heat pipe, and the distance between the center position of the circular hole and the right edge of the groove is , the distance from the left edge of the groove is ,in, L Equal to the length of the thermoelectric module.

3. The stacked automobile temperature difference power generation device with integrated heat pipe according to claim 1, characterized in that: The hot end heat pipe is divided into zones according to the temperature environment. From the exhaust gas inlet to the exhaust gas outlet, it is divided into high temperature zone, medium temperature zone and low temperature zone, that is, the first layer to the second layer. The layer is the high temperature area. Layer to The layer is the medium temperature zone. To N The layer is the low temperature zone; according to the lowest working temperature of different temperature zones, the hot end heat pipes with corresponding temperature parameters are selected, which are divided into high temperature zone heat pipes, medium temperature zone heat pipes and low temperature zone heat pipes, and they are assembled with the corresponding hot end flat plates.

4. The stacked automobile temperature difference power generation device with integrated heat pipe according to claim 2, characterized in that: The cold end plate includes 6 platforms, and each platform has a square groove with a thickness of 0.1-1mm. The size of the groove is equal to the size of the thermoelectric module. The other end of the thermoelectric module is embedded in the square groove, and the position of the groove is consistent with the position of the hot end plate groove; 2 circular holes are dug on the side of each platform, and the diameter of the circular holes is equal to the diameter of the cold end heat pipe; the evaporation end of the cold end heat pipe is embedded in the circular hole; the inscribed circle diameter of the cold end plate is larger than the maximum inscribed circle diameter of the hot end plate.

5. The stacked automobile temperature difference power generation device with integrated heat pipe according to claim 1 or 4, characterized in that: The evaporation end of the cold end heat pipe is located inside the circular hole of the cold end plate and is kept flush with one side outlet of the circular hole, and the condensation end is embedded in the radiator.

6. The stacked automobile temperature difference power generation device with integrated heat pipe according to claim 1, characterized in that: The radiator has a coolant flow channel inside, and the coolant flow direction is opposite to the exhaust flow direction. Circular holes are distributed on both sides of the coolant flow channel. The condensing end of the cold end heat pipe is embedded in the circular hole, and the position of the circular hole is consistent with the position of the circular hole of the cold end plate.

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