Thermal management system and method for thermoelectric battery

Abstract

The invention relates to a thermal management system and method for a thermoelectric battery, and aims to solve the problems that an existing hybrid electric vehicle is low in waste heat utilization efficiency, insufficient in battery temperature management and poor in system collaboration. The system comprises a methanol storage module, a methanol engine module, a waste heat recovery module, a thermoelectric heat management module, a power battery pack module, a backup energy storage module, a heat dissipation module and a coordination control module. High-temperature tail gas waste heat generated by the methanol engine is converted into electric energy through the waste heat recovery module and the thermoelectric conversion device, and the electric energy is used for self-energy supply of a heat management system and temperature control support of a power battery. The thermal management method monitors the electric quantity and temperature of the battery in real time through the coordination control module, intelligently adjusts the working mode, ensures that the power battery operates within the optimal temperature range, and improves the energy utilization efficiency and the system stability. Organic combination of heat energy recovery, energy storage and temperature control management is achieved, and an innovative solution is provided for efficient operation of the methanol hybrid electric vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid electric vehicles, and in particular to a thermoelectric battery thermal management system and method. Background Art

[0002] As the global energy crisis and environmental pollution problems become increasingly serious, the development of green and efficient energy power systems has become an important direction for the development of the automotive industry. As a transitional solution between traditional fuel vehicles and new energy vehicles, hybrid vehicles have been widely used around the world due to their low fuel consumption and emission characteristics. However, most traditional hybrid vehicles rely on gasoline or diesel engines, which not only faces the challenge of the gradual depletion of fossil fuel resources, but also brings high carbon emission pressure. Methanol, as an environmentally friendly, efficient and economical alternative fuel, has gradually become an important research direction for hybrid vehicles due to its abundant resources, low emissions and renewability.

[0003] Methanol engines have higher thermal efficiency and higher exhaust temperatures during combustion, which are usually significantly higher than traditional gasoline engines. This feature provides more favorable conditions for the recovery and utilization of thermal energy. However, most methanol hybrid vehicles on the market have not yet fully utilized the waste heat in the high-temperature exhaust gas of the engine, resulting in a large amount of energy being wasted. In addition, power batteries play a key role in hybrid vehicles, but the heat generated during the charging and discharging process is not adequately managed, which may cause performance degradation or safety hazards.

[0004] The existing hybrid vehicle thermal management systems are mostly focused on a single function, such as cooling or heating the power battery, but lack systematic recycling of the waste heat resources generated during vehicle operation. In addition, the charging and discharging requirements of the power battery under different operating conditions and the thermal management requirements have not been effectively coordinated, resulting in low system efficiency and failure to meet the high efficiency and energy saving requirements of hybrid vehicles. Therefore, it is urgent to develop an innovative self-powered thermal management system that integrates methanol combustion power, waste heat recovery and thermoelectric conversion functions, in order to achieve efficient conversion of waste heat, while providing temperature control support for the power battery, and improving the energy utilization efficiency and operating stability of the entire vehicle system. Summary of the invention

[0005] The object of the present invention is to provide a thermoelectric battery thermal management system and method to overcome the shortcomings of the prior art, such as low waste heat utilization efficiency, insufficient battery temperature management and poor system coordination.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides a thermoelectric battery thermal management system, comprising: a methanol storage module, the methanol storage module is connected to a methanol engine module, the methanol engine module is connected to a drive motor module and a power battery module; The methanol engine module is also connected to a waste heat recovery module, which is connected to a backup energy storage module and a heat dissipation module, which are in turn connected to a thermoelectric thermal management module; The power battery pack module is also connected to a coordination control module.

[0007] The waste heat recovery module includes a high-temperature exhaust pipe module, one end of the high-temperature exhaust pipe module is connected to the methanol engine module, and the other end is connected to the heat exchanger module. The heat exchanger module is also connected to a thermoelectric conversion device, and the thermoelectric conversion device is connected to the backup energy storage module and the heat dissipation module.

[0008] The thermoelectric conversion device comprises a high temperature end and a low temperature end. The upper end of the thermoelectric conversion device contacts the heat exchanger module to form the high temperature end, and the lower end of the thermoelectric conversion device is connected to the heat dissipation module to form the low temperature end.

[0009] The thermoelectric conversion device includes a plurality of temperature difference generators.

[0010] The methanol engine module is a direct-injection methanol engine.

[0011] The power battery pack module includes several lithium-ion batteries.

[0012] The coordination control module includes a battery power detection unit and a battery temperature detection unit. The battery power detection unit and the battery temperature detection unit are connected to the power battery pack module on one hand, and are connected to the core processing unit on the other hand.

[0013] In a second aspect, the present invention provides a thermoelectric battery thermal management method, based on a thermoelectric battery thermal management system, comprising: Obtain the battery power signal S1 and battery temperature signal T1 of the power battery pack module parameters; The coordination control module determines the working conditions based on the battery power signal S1 and decides the working mode of the methanol engine and the power battery pack; The coordination control module controls the working mode of the thermoelectric thermal management module according to the battery temperature signal T1.

[0014] The coordination control module determines the working conditions based on the battery power signal S1 and determines the working mode of the methanol engine and the power battery pack, including: When S1 is less than the low power setting value, only the methanol engine module provides power; When S1 is greater than the low power setting value and less than the high power setting value, the methanol engine module and the power battery module jointly provide power; When S1 is greater than the high power setting value, only the power battery pack module provides power.

[0015] The coordination control module controls the working mode of the thermoelectric thermal management module according to the battery temperature signal T1, including: When T1 is greater than the first high temperature value and less than the second high temperature value, the thermoelectric thermal management module operates in a low-power cooling mode; When T1 is greater than the second high temperature value, the thermoelectric thermal management module operates in a high-power cooling mode; When T1 is greater than the first low temperature value and less than the first high temperature value, the thermoelectric thermal management module operates in standby mode; When T1 is greater than the second low temperature value and less than the first low temperature value, the thermoelectric thermal management module operates in a low-power heating mode; When T1 is less than the second low temperature value, the thermoelectric thermal management module operates in a high-power heating mode.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention constructs an innovative self-powered thermal management system by integrating methanol combustion power, waste heat recovery and thermoelectric conversion functions. The system utilizes the high-temperature exhaust waste heat of the methanol engine and converts it into electrical energy through a waste heat recovery module and a thermoelectric conversion device. It not only provides self-powered support for the operation of the thermal management system, but also stores it in a backup energy storage module to meet the thermal management requirements of the power battery under different operating conditions. This design realizes the organic combination of heat recovery, energy storage and temperature control management, effectively improves the energy utilization efficiency and operating stability of the vehicle system, reduces dependence on external power supplies, enhances the independence and continuity of the system, and provides an innovative solution for the efficient operation of methanol hybrid vehicles.

[0017] The thermal management method of the present invention obtains the power and temperature signals of the power battery pack in real time through the coordination control module, and intelligently decides the working mode of the methanol engine and the power battery pack and the cooling or heating mode of the thermoelectric thermal management module according to different working conditions and parameter thresholds. The method can ensure that the power battery is always in the optimal operating temperature range, thereby significantly improving the charging and discharging efficiency of the battery and extending its service life. At the same time, the power source is reasonably allocated according to the power situation, further optimizing the energy utilization efficiency of the vehicle, enhancing the stability and reliability of the whole vehicle system, and achieving the dual goals of energy saving and environmental protection and efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a thermoelectric battery thermal management system in an embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the operation of the thermoelectric generator in the waste heat recovery module in an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of a heat dissipation mode of a thermoelectric cooler in a thermoelectric battery thermal management system according to an embodiment of the present invention.

[0021] Figure 4Schematic diagram of a heating mode of a thermoelectric cooler in a thermoelectric battery thermal management system according to an embodiment of the present invention.

[0022] Figure 5 The figure is a schematic flow chart of a method for thermal management of a thermoelectric battery in an embodiment of the present invention.

[0023] Figure 6 Schematic diagram of the working process of a thermoelectric battery thermal management method under different working conditions in an embodiment of the present invention.

[0024] Figure 7 Schematic diagram of the working process of the self-powered thermoelectric battery thermal management system in an embodiment of the present invention.

[0025] In the figure, 1. methanol storage module, 2. methanol engine module, 3. electric motor module, 4. waste heat recovery module, 5. power battery pack module, 6. backup energy storage module, 7. thermoelectric thermal management module, 8. heat dissipation module, 9. coordination control module, 401. high-temperature exhaust pipe module, 402. heat exchanger module, 403. thermoelectric conversion device, 701. ceramic heat conducting plate, 702. copper conductor, 703. PN semiconductor component, 901. battery power detection unit, 902. battery temperature detection unit, 903. core processing unit 903. DETAILED DESCRIPTION

[0026] As the global energy crisis and environmental pollution problems become increasingly serious, the development of green and efficient energy power systems has become an important direction for the development of the automotive industry. As a transitional solution between traditional fuel vehicles and new energy vehicles, hybrid vehicles have been widely used around the world due to their low fuel consumption and emission characteristics. However, most traditional hybrid vehicles rely on gasoline or diesel engines, which not only faces the challenge of the gradual depletion of fossil fuel resources, but also brings high carbon emission pressure. Methanol, as an environmentally friendly, efficient and economical alternative fuel, has gradually become an important research direction for hybrid vehicles due to its abundant resources, low emissions and renewability.

[0027] Methanol engines have higher thermal efficiency and higher exhaust temperatures during combustion, which are usually significantly higher than traditional gasoline engines. This feature provides more favorable conditions for the recovery and utilization of thermal energy. However, most methanol hybrid vehicles on the market have not yet fully utilized the waste heat in the high-temperature exhaust gas of the engine, resulting in a large amount of energy being wasted. In addition, power batteries play a key role in hybrid vehicles, but the heat generated during the charging and discharging process is not adequately managed, which may cause performance degradation or safety hazards.

[0028] The existing hybrid vehicle thermal management system focuses on a single function, such as cooling or heating the power battery, but lacks systematic recycling of waste heat generated during vehicle operation. In addition, the charging and discharging requirements of the power battery under different working conditions and the thermal management requirements fail to work together effectively, resulting in low system efficiency and failure to meet the high efficiency and energy saving requirements of hybrid vehicles.

[0029] Therefore, the present invention provides an innovative self-powered thermal management system that integrates methanol combustion power, waste heat recovery and thermoelectric conversion functions, which can not only realize efficient conversion of waste heat, but also provide temperature control support for power batteries, thereby improving the energy utilization efficiency and operation stability of the entire vehicle system. The system utilizes the high-temperature exhaust gas of the methanol engine, and converts the high-temperature exhaust gas waste heat into electrical energy through a waste heat recovery module and a thermoelectric conversion device. The generated electrical energy can not only provide self-powered support for the operation of the thermal management system, but can also be stored in a backup energy storage module to meet the thermal management requirements of power batteries under different working conditions. This self-powered design not only reduces dependence on external power supplies, but also further improves the energy utilization efficiency and system independence of the entire vehicle, realizes the organic combination of heat recovery, energy storage and temperature control management, and provides an innovative solution for the efficient operation of methanol hybrid vehicles.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0034] In order to facilitate understanding of the technical solution provided in the embodiments of the present application, a thermoelectric battery thermal management system of the present application is introduced below.

[0035] Reference Figure 1 , is a schematic diagram of a thermoelectric battery thermal management system of the present application. Figure 1 As shown, the system includes: A methanol storage module 1, wherein the methanol storage module 1 is connected to a methanol engine module 2, and the methanol engine module 2 is connected to a drive motor module 3 and a power battery module 5; The methanol engine module 2 is also connected to a waste heat recovery module 4, the waste heat recovery module 4 is connected to a backup energy storage module 6 and a heat dissipation module 8, and the backup energy storage module 6 and the heat dissipation module 8 are further connected to a thermoelectric thermal management module 7; The power battery pack module 5 is also connected to a coordination control module 9 .

[0036] The methanol storage tank module 1 is used to provide methanol fuel for the methanol engine module 2. The methanol engine module 2 is a direct-injection methanol engine that allows methanol to be fully burned to provide mechanical power and electrical energy for the vehicle, which is used to drive the motor module 3 and charge the power battery module 5.

[0037] The waste heat recovery module 4 includes a high-temperature exhaust pipe module 401, one end of which is connected to the methanol engine module 2, and the other end is connected to a heat exchanger module 402, and the heat exchanger module 402 is also connected to a thermoelectric conversion device 403, and the thermoelectric conversion device 403 is connected to the backup energy storage module 6 and the heat dissipation module 8. The high-temperature exhaust gas generated by the combustion of methanol passes through the high-temperature exhaust pipe module 401, and the heat exchanger module 402 installed on the exhaust pipe provides a high-temperature heat source for the thermoelectric conversion device 403, wherein the thermoelectric conversion device 403 is composed of a plurality of temperature difference generators.

[0038] The thermoelectric conversion device 403 includes a high temperature end and a low temperature end. The upper end of the thermoelectric conversion device 403 contacts the heat exchanger module 402 to form the high temperature end, and the lower end of the thermoelectric conversion device 403 is connected to the heat dissipation module 8 to form the low temperature end. The heat dissipation module 8 is generally a car water pump and condensed water, which is used to provide a cold source for each thermoelectric generator. Under the action of the temperature difference between the upper and lower ends of the thermoelectric generator, the thermoelectric conversion device 403 converts the waste heat of the automobile exhaust into electrical energy and stores it in the backup energy storage module 6.

[0039] The power battery module 5 is composed of a plurality of lithium-ion batteries, which are used to store the extra electricity generated during the operation of the methanol engine module 2 and cooperate with the methanol engine module 2 to provide sufficient kinetic energy for the vehicle.

[0040] The coordination control module 9 includes a battery power detection unit 901 and a battery temperature detection unit 902, which are connected to the power battery pack module on one hand, and are connected to the core processing unit 903 on the other hand. The battery power detection unit 901 and the battery temperature detection unit 902 mainly measure the overall power and overall temperature of the power battery pack module 5, respectively, and the core processing unit 903 judges the signal and controls other modules.

[0041] It should be noted that, referring to Figure 2 As shown, the thermoelectric generator in the thermoelectric conversion device 403 and the thermoelectric cooler in the thermoelectric heat management module 7 are both composed of a ceramic heat conducting plate 701, a copper conductor 702 and a PN semiconductor component 703, wherein the PN semiconductor component 703 is connected in series through the copper conductor 702. Figure 3 The figure shows the heat dissipation working mode of the thermoelectric cooler in the thermoelectric thermal management system. Figure 4The figure shows a schematic diagram of the heating working mode of the thermoelectric cooler in the thermoelectric heat management system. The working principle of the thermoelectric generator and the thermoelectric cooler is: when a large temperature difference occurs between the upper and lower ceramic heat conducting plates, the Seebeck effect of the PN semiconductor component 703 outputs electrical energy, which is stored in the backup energy storage module 6 and works as a thermoelectric generator; when electrical energy is input to the PN semiconductor component 703 through the backup energy storage module 6, a large temperature difference is generated between the upper and lower ends of the ceramic heat conducting plate 701 based on the Peltier effect to perform cooling.

[0042] The following is an introduction to a thermoelectric battery thermal management method provided by the present application through an embodiment. The method is based on a thermoelectric battery thermal management system. Figure 5 As shown, including: S101, obtaining a battery power signal S1 and a battery temperature signal T1 of a power battery pack module; S102, the coordination control module determines the working condition according to the battery power signal S1 and determines the working mode of the methanol engine and the power battery pack; S103, the coordination control module controls the working mode of the thermoelectric thermal management module according to the battery temperature signal T1.

[0043] The coordination control module determines the working conditions based on the battery power signal S1 and determines the working mode of the methanol engine and the power battery pack, including: When S1 is less than the low power setting value, only the methanol engine module provides power; When S1 is greater than the low power setting value and less than the high power setting value, the methanol engine module and the power battery module jointly provide power; When S1 is greater than the high power setting value, only the power battery pack module provides power.

[0044] The coordination control module controls the working mode of the thermoelectric thermal management module according to the battery temperature signal T1, including: When T1 is greater than the first high temperature value and less than the second high temperature value, the thermoelectric thermal management module operates in a low-power cooling mode; When T1 is greater than the second high temperature value, the thermoelectric thermal management module operates in a high-power cooling mode; When T1 is greater than the first low temperature value and less than the first high temperature value, the thermoelectric thermal management module operates in standby mode; When T1 is greater than the second low temperature value and less than the first low temperature value, the thermoelectric thermal management module operates in a low-power heating mode; When T1 is less than the second low temperature value, the thermoelectric thermal management module operates in a high-power heating mode.

[0045] In order to make the present application easier to understand, a thermoelectric battery thermal management method combined with actual application scenarios is provided. It should be noted that in this embodiment, N% is a low power setting value, specifically 30%, and M% is a high power setting value, specifically 70%; T 1max is the first high temperature value, specifically 40°C, T 2max is the second high temperature value, specifically 50°C, T 1min is the first low temperature value, specifically 10°C, T 2min It is the second lowest temperature value, specifically -10°C.

[0046] Specifically, refer to Figure 6 As shown, it is a schematic diagram of the working process of the methanol hybrid vehicle of the present application under different working conditions. The core processing unit 903 realizes the coordinated work between the methanol engine 2 and the power battery pack module 5 according to the different working conditions of the methanol hybrid vehicle and the battery power signal S1 of the power battery pack 5.

[0047] When the battery power signal S1 of the power battery pack 5 is less than N%, the methanol engine 2 is used as the power source of the vehicle, and the power battery pack module 5 does not provide power. The methanol engine 2 converts methanol into electrical energy, and charges the power battery pack module 5 on the basis of maintaining the operation of the vehicle. In addition, the high-temperature exhaust gas generated during the operation of the methanol engine 2 is converted into electrical energy through the waste heat recovery module 4, a part of which is input into the thermoelectric thermal management module 7 for temperature management of the power battery pack module 5 charging process, and the other part is stored in the backup energy storage module 6 for subsequent energy supply of the thermoelectric thermal management module 7; When the battery power signal N%<S1<M% of the power battery pack 5, the methanol engine 2 and the power battery pack module 5 are used together as the power source, and the power battery pack module 5 mainly assists the methanol engine 2 to supplement the instantaneous high power demand (such as acceleration and climbing), and the methanol engine 2 burns methanol to maintain the operation of the vehicle. At the same time, the high-temperature exhaust gas generated continues to pass through the waste heat recovery module 4 to convert the heat energy into electrical energy, a part of which is input into the thermoelectric thermal management module 7 for temperature management of the power battery pack module 5 during the discharge process, and the other part is stored in the backup energy storage module 6 for subsequent energy supply of the thermoelectric thermal management module 7; When the battery power signal S1 of the power battery pack 5 is greater than M%, the methanol engine 2 stops working and the power battery pack module 5 serves as the power source of the vehicle. At this time, the power battery pack module 5 needs to be temperature managed. The electric energy stored in the previous backup energy storage module 6 is input into the thermoelectric thermal management module 7 to achieve optimal temperature control of the power battery pack module 5.

[0048] like Figure 7The figure shows a schematic diagram of the working process of the self-powered thermoelectric battery thermal management system in this embodiment, wherein the coordination control module 9 controls the current magnitude and direction of the backup energy storage module 6 input to the thermoelectric thermal management module 7 according to the battery temperature signal T1 of the power battery pack 5 to achieve the optimal operating temperature of the power battery pack 5 under different working conditions: When the battery temperature signal T1>T 1max When the backup energy storage module 6 supplies a forward current to the thermoelectric thermal management module 7, the thermoelectric thermal management module 7 acts as a cooling mode to dissipate heat for the power battery module 5; When the battery temperature signal T 1min <T1<T 1max When the backup energy storage module 6 does not continue to supply current to the thermoelectric thermal management module 7, the temperature of the power battery module 5 is within its optimal operating temperature range; When the battery temperature signal T1<T 1min When the backup energy storage module 6 supplies reverse current to the thermoelectric thermal management module 7, the cooling end and the heating end of each thermoelectric refrigerator in the thermoelectric thermal management module 7 are reversed, and the thermoelectric thermal management module 7 acts as a heating mode to preheat the power battery pack module 5.

[0049] Further, such as Figure 7 As shown, the thermoelectric thermal management module 7 has two working modes, high power and low power, in both cooling mode and heating mode: When the battery temperature signal T 1max >T1>T 2max When the battery temperature signal T1>T 2max When , the backup energy storage module 6 supplies a large forward current to the thermoelectric thermal management module 7, and the thermoelectric thermal management module 7 operates in a high-power cooling mode; When the battery temperature signal T 1min >T1>T 2min When the battery temperature signal T1 < T 2max When , the backup energy storage module 6 supplies a large reverse current to the thermoelectric thermal management module 7, and the thermoelectric thermal management module 7 operates in a high-power preheating mode.

[0050] The present invention efficiently converts the high-temperature exhaust gas heat energy generated by methanol combustion into electrical energy through a thermoelectric conversion device, thereby fully utilizing waste heat resources. Compared with traditional systems, the present invention greatly improves energy utilization efficiency, reduces methanol fuel consumption and emissions, and effectively achieves the goal of energy conservation and environmental protection. The thermoelectric thermal management module designed in the present invention has an intelligent temperature adjustment function, which can switch the cooling and heating modes in real time according to the working status of the power battery to ensure that the battery is always in the optimal temperature range. The precise temperature control capability not only improves the charging and discharging efficiency of the battery, but also significantly extends the battery life and improves the stability and reliability of the vehicle system. The present invention stores the recovered waste heat electricity in the backup energy storage module through temperature difference power generation technology to support the operation of the thermoelectric thermal management module, thereby realizing the self-power supply capability of the system under various working conditions. This innovative design reduces the dependence on external power supplies and further improves the independence, continuity and operating efficiency of the vehicle thermal management system.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A thermoelectric battery thermal management system, characterized in that: include: A methanol storage module (1), wherein the methanol storage module (1) is connected to a methanol engine module (2), and the methanol engine module (2) is connected to a drive motor module (3) and a power battery module (5); The methanol engine module (2) is also connected to a waste heat recovery module (4), the waste heat recovery module (4) is connected to a backup energy storage module (6) and a heat dissipation module (8), and the backup energy storage module (6) and the heat dissipation module (8) are in turn connected to a thermoelectric heat management module (7); The power battery pack module (5) is also connected to a coordination control module (9).

2. A thermoelectric battery thermal management system according to claim 1, characterized in that: The waste heat recovery module (4) comprises a high-temperature exhaust pipe module (401), one end of the high-temperature exhaust pipe module (401) is connected to the methanol engine module (2), and the other end is connected to a heat exchanger module (402), the heat exchanger module (402) is also connected to a thermoelectric conversion device (403), and the thermoelectric conversion device (403) is connected to a backup energy storage module (6) and a heat dissipation module (8).

3. A thermoelectric battery thermal management system according to claim 2, characterized in that: The thermoelectric conversion device (403) comprises a high-temperature end and a low-temperature end. The upper end of the thermoelectric conversion device (403) contacts the heat exchanger module (402) to form the high-temperature end, and the lower end of the thermoelectric conversion device (403) is connected to the heat dissipation module (8) to form the low-temperature end.

4. A thermoelectric battery thermal management system according to claim 2, characterized in that: The thermoelectric conversion device (403) includes a plurality of temperature difference generators.

5. A thermoelectric battery thermal management system according to claim 1, characterized in that: The methanol engine module (2) is a direct-injection methanol engine.

6. A thermoelectric battery thermal management system according to claim 1, characterized in that: The power battery pack module (5) comprises a plurality of lithium-ion batteries.

7. A thermoelectric battery thermal management system according to claim 1, characterized in that: The coordination control module (9) comprises a battery power detection unit (901) and a battery temperature detection unit (902); the battery power detection unit (901) and the battery temperature detection unit (902) are connected to the power battery pack module on one hand, and are connected to the core processing unit (903) on the other hand.

8. A thermoelectric battery thermal management method, based on a thermoelectric battery thermal management system, characterized in that: include: Obtain the battery power signal S1 and battery temperature signal T1 of the power battery pack module parameters; The coordination control module determines the working conditions based on the battery power signal S1 and decides the working mode of the methanol engine and the power battery pack; The coordination control module controls the working mode of the thermoelectric thermal management module according to the battery temperature signal T1.

9. A thermoelectric battery thermal management method according to claim 7, characterized in that: The coordination control module determines the working condition according to the battery power signal S1 and determines the working mode of the methanol engine and the power battery pack, including: When S1 is less than the low power setting value, only the methanol engine module provides power; When S1 is greater than the low power setting value and less than the high power setting value, the methanol engine module and the power battery module jointly provide power; When S1 is greater than the high power setting value, only the power battery pack module provides power.

10. A thermoelectric battery thermal management method according to claim 7, characterized in that: The coordination control module controls the working mode of the thermoelectric thermal management module according to the battery temperature signal T1, including: When T1 is greater than the first high temperature value and less than the second high temperature value, the thermoelectric thermal management module operates in a low-power cooling mode; When T1 is greater than the second high temperature value, the thermoelectric thermal management module operates in a high-power cooling mode; When T1 is greater than the first low temperature value and less than the first high temperature value, the thermoelectric thermal management module operates in standby mode; When T1 is greater than the second low temperature value and less than the first low temperature value, the thermoelectric thermal management module operates in a low-power heating mode; When T1 is less than the second low temperature value, the thermoelectric thermal management module operates in a high-power heating mode.

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