Engine thermal power generation system, automobile and thermal power generation method and device

Abstract

The invention provides an engine thermal power generation system, an automobile and a thermal power generation method and device. The engine thermal power generation system comprises a thermal power generation module, a temperature sensor, a battery controller and a battery pack. The battery controller is used for controlling the first relay to close a loop of the thermal power generation module and the battery pack when it is detected that the internal temperature of the exhaust pipe is larger than the preset temperature and the residual electric quantity of the battery pack is smaller than the preset electric quantity. Or when it is detected that the internal temperature of the exhaust pipe is not larger than the preset temperature or the residual electric quantity of the battery pack is not smaller than the preset electric quantity, the first relay is controlled to disconnect the loop of the thermal power generation module and the battery pack. Heat energy carried by waste gas in the exhaust pipe is converted into electric energy through the thermal power generation module, the battery pack is charged under the control of the battery controller, the heat energy carried by the waste gas can be fully utilized, and resource waste is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy recovery, and in particular relates to an engine thermal power generation system, an automobile, a thermal power generation method and a device. Background Art

[0002] The internal combustion engine and electric drive system in hybrid vehicles work together to reduce fuel consumption and emissions. The engine will produce high-temperature exhaust gas when it is working. At present, the exhaust gas is directly discharged into the air after the engine post-processing device reduces the content of harmful substances. The exhaust gas is a high-temperature and high-pressure gas, and the energy contained in it accounts for about 35% of the total energy of the internal combustion engine. The heat energy in the exhaust gas has not been fully utilized, resulting in a waste of resources.

[0003] Commonly used exhaust gas treatment technologies include EGR (Exhaust Gas Re-circulation) technology, which introduces engine combustion exhaust gas into the engine intake system and combines it with air before re-entering the cylinder to participate in combustion. This can reduce combustion temperature and inhibit the production of knock and nitrogen oxides.

[0004] However, in order to ensure the engine output power, the proportion of exhaust gas introduced into the intake system in EGR technology is relatively low, and more than 90% of the exhaust gas is not utilized. In addition, the switching valve in the EGR system has a high failure rate due to long-term operation in a high temperature and high vibration environment. Summary of the invention

[0005] The present invention provides an engine thermal power generation system, a vehicle, a thermal power generation method and a device, which convert the thermal energy in the exhaust gas into electrical energy and store it in a battery pack, thereby solving the problem that the thermal energy of the exhaust gas is not fully utilized in the prior art, resulting in a waste of resources.

[0006] In a first aspect, the present invention provides an engine thermal power generation system, characterized in that it includes a thermal power generation module, a temperature sensor, a battery controller and a battery pack;

[0007] The thermal power generation module is electrically connected to the battery pack; one end of the thermal power generation module is located inside the exhaust pipe, and the other end is located outside the exhaust pipe; the temperature sensor is arranged on the exhaust pipe and electrically connected to the battery controller, and is used to collect the internal temperature of the exhaust pipe and transmit it to the battery controller;

[0008] A first relay is provided on the circuit between the thermal power generation module and the battery pack; the battery controller is electrically connected to the first relay; the battery controller is electrically connected to the battery pack and is used to detect the remaining power of the battery pack;

[0009] The battery controller is used to control the first relay to close the circuit between the thermal power generation module and the battery pack when it detects that the internal temperature of the exhaust pipe is greater than a preset temperature and the remaining power of the battery pack is less than a preset power, or to control the first relay to disconnect the circuit between the thermal power generation module and the battery pack when it detects that the internal temperature of the exhaust pipe is not greater than a preset temperature or the remaining power of the battery pack is not less than a preset power.

[0010] Optionally, the thermal power generation module includes a plurality of thermoelectric conversion devices; the plurality of thermoelectric conversion devices are arranged on the exhaust pipe and are electrically connected to the battery pack after being connected in parallel.

[0011] Optionally, the battery pack includes two battery packs connected in parallel; a second relay is provided on the circuit of the two battery packs connected in parallel; and the battery controller is electrically connected to the second relay to control the second relay to open or close the circuit of the two battery packs connected in parallel.

[0012] In a second aspect, the present invention provides a vehicle comprising the engine thermal power generation system as described in the first aspect.

[0013] In a third aspect, the present invention provides a thermal power generation method based on the engine thermal power generation system according to the first aspect, comprising:

[0014] S1, obtaining the temperature inside the exhaust pipe and the remaining power of the battery pack;

[0015] S2, determining whether the temperature inside the exhaust pipe is greater than a preset temperature and whether the remaining power of the battery pack is less than a preset power;

[0016] S3, if the temperature is greater than the preset temperature and less than the preset power, control the first relay to close the circuit between the thermal power generation module and the battery pack, and return to execute the operation of S1;

[0017] S4, if the temperature is not greater than the preset temperature or not less than the preset power, the first relay is controlled to disconnect the circuit between the thermal power generation module and the battery pack, and the operation of S1 is returned to be executed.

[0018] In a fourth aspect, the present invention provides a thermal power generation device based on the engine thermal power generation system according to the first aspect, comprising:

[0019] An acquisition module is used to obtain the temperature inside the exhaust pipe and the remaining power of the battery pack;

[0020] A judgment module, used to judge whether the temperature inside the exhaust pipe is greater than a preset temperature and whether the remaining power of the battery pack is less than a preset power;

[0021] A first control module, configured to control a first relay to close a circuit between the thermal power generation module and the battery pack, and return to execute the operation of the acquisition module when the judgment module determines that the temperature is greater than a preset temperature and less than a preset power.

[0022] The second control module is used to control the first relay to disconnect the circuit between the thermal power generation module and the battery pack and return to execute the operation of the acquisition module when the judgment module determines that the temperature is not greater than the preset temperature or not less than the preset power.

[0023] In a fifth aspect, the present invention provides a computer device, comprising a processor and a memory; wherein, when the processor executes a computer program stored in the memory, the steps of the thermal power generation method described in the third aspect are implemented.

[0024] In a sixth aspect, the present invention provides a computer-readable storage medium for storing a computer program; when the computer program is executed by a processor, the steps of the thermal power generation method described in the third aspect are implemented.

[0025] In a seventh aspect, the present invention provides a computer program product, comprising computer executable instructions or a computer program, which, when executed by a processor, implements the steps of the thermal power generation method described in the third aspect.

[0026] The present invention provides an engine thermal power generation system, an automobile, a thermal power generation method and a device, wherein the engine thermal power generation system utilizes a thermal power generation module to convert the thermal energy carried by the exhaust gas in the exhaust pipe into electrical energy and charges the battery pack under the control of a battery controller, thereby being able to more fully utilize the thermal energy carried by the exhaust gas and reduce resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of an engine thermal power generation system provided by an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a process flow of a thermal power generation method provided by an embodiment of the present invention;

[0030] Figure 3 A schematic structural diagram of a thermal power generation device provided in an embodiment of the present invention.

[0031] Among them, 1. thermal power generation module, 11. thermoelectric conversion device; 2. temperature sensor; 3. battery controller; 4. battery pack, 41. battery group; 5. exhaust pipe; 6. first relay; 7. second relay. DETAILED DESCRIPTION

[0032] 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.

[0033] Example 1

[0034] like Figure 1 As shown, this embodiment provides an engine thermal power generation system, including a thermal power generation module 1, a temperature sensor 2, a battery controller 3 and a battery pack 4.

[0035] The thermal power generation module 1 is electrically connected to the battery pack 4; one end of the thermal power generation module 1 is located inside the exhaust pipe 5, and the other end is located outside the exhaust pipe 5. When two different conductors or semiconductors form a closed loop, if the temperatures of the two connection points are different, an electromotive force will be generated in the loop. This phenomenon is called the Seebeck effect. The thermal power generation module 1 usually uses this effect to work. For example, n-type and p-type semiconductor elements made of thermoelectric materials such as bismuth telluride (Bi2Te3) have one end at a high-temperature heat source, that is, in contact with the exhaust gas, and the other end at a low-temperature cold source, that is, outside the exhaust pipe 5. This will generate a voltage difference between the two ends of the semiconductor, and current can be generated by connecting to an external circuit.

[0036] Exemplarily, the thermal power generation module 1 includes a plurality of thermoelectric conversion devices 11 ; the plurality of thermoelectric conversion devices 11 are disposed on the exhaust pipe 5 and are electrically connected to the battery pack 4 after being connected in parallel.

[0037] The temperature sensor 2 is arranged on the exhaust pipe 5 and electrically connected to the battery controller 3, and is used to collect the internal temperature of the exhaust pipe 5 and transmit it to the battery controller 3. A first relay 6 is arranged on the circuit between the thermal power generation module 1 and the battery pack 4; the battery controller 3 is electrically connected to the first relay 6; the battery controller 3 is electrically connected to the battery pack 4, and is used to detect the remaining power of the battery pack 4.

[0038] Exemplarily, the battery pack 4 includes two parallel battery packs 41; a second relay 7 is provided on the circuit of the two parallel battery packs 41; the battery controller 3 is electrically connected to the second relay 7 to control the second relay 7 to open or close the circuit of the two parallel battery packs 41.

[0039] In charging mode, the battery controller 3 controls the first relay 6 to close so that the output voltage of the thermal power generation module 1 is directly output to the battery pack 41. The battery controller 3 controls the second relay 7 to open so that the battery pack 41 being charged is disconnected from the other battery pack 41, so that it does not participate in the power output of the power battery system.

[0040] In the electric balancing mode, the battery controller 3 disconnects the first relay 6 and closes the second relay 7 after detecting that the charged battery pack 41 is fully charged, so that the charged battery pack 41 can output electricity to the uncharged battery pack 41 of the battery pack 4, thereby achieving the overall electric balance of the battery pack 4. When the battery controller 3 detects that the electric balancing is completed, it enters the charging start stage.

[0041] In the automotive battery system, the battery controller 3 collects voltage data through high-precision voltage sensors connected to both ends of the battery cells. These sensors can convert the voltage signal of the battery into an electrical signal and transmit it to the battery controller 3. For example, in the lithium battery pack of an electric vehicle, the voltage range of each battery cell may be between 3V and 4.2V. The battery controller 3 will sample these voltages at a certain frequency (such as several times per second) to monitor the real-time voltage status of each battery cell.

[0042] The battery controller 3 uses a current sensor to measure the charge and discharge current of the battery. The current sensor usually works based on the Hall effect principle. When current passes through, a magnetic field change is generated, and this magnetic field change is converted into an electrical signal. By integrating the current, the battery controller 3 can calculate the charge and discharge amount of the battery, which is used to estimate the state of charge (SOC). For example, when the vehicle accelerates, the battery discharge current increases, and the battery controller 3 can accurately record this change process.

[0043] The temperature sensor is generally a temperature sensitive element such as a thermistor, and its resistance value changes with the change of temperature. The battery controller 3 obtains the temperature information of the exhaust gas in the exhaust pipe 5 by detecting the change of the resistance value of the temperature sensor.

[0044] State of Charge (SOC) Estimation: The battery controller 3 uses a combination of methods to estimate the SOC. A common method is the ampere-hour integration method, which calculates the change in SOC by integrating the charge and discharge currents over time based on the initial SOC value of the battery. For example, if the initial SOC is 80% and the discharge current is 10A, after 1 hour of discharge, the reduction in SOC can be calculated based on the rated capacity of the battery (assuming it is 100Ah). However, the ampere-hour integration method is affected by factors such as the accuracy of the current sensor and the self-discharge of the battery, resulting in accumulated errors. Therefore, the open circuit voltage method is also combined to correct the SOC estimate. The open circuit voltage method uses the inherent characteristic relationship between the open circuit voltage of the battery and the SOC. When the battery is in a static state, the SOC is determined by measuring its open circuit voltage.

[0045] The battery controller 3 is used to control the first relay 6 to close the circuit between the thermal power generation module 1 and the battery pack 4 when it is detected that the internal temperature of the exhaust pipe 5 is greater than the preset temperature and the remaining power of the battery pack 4 is less than the preset power, or to control the first relay 6 to disconnect the circuit between the thermal power generation module 1 and the battery pack 4 when it is detected that the internal temperature of the exhaust pipe 5 is not greater than the preset temperature or the remaining power of the battery pack 4 is not less than the preset power.

[0046] In summary, the engine thermal power generation system provided in this embodiment uses a thermal power generation module to convert the heat energy carried by the exhaust gas in the exhaust pipe into electrical energy and charges the battery pack under the control of the battery controller, which can more fully utilize the heat energy carried by the exhaust gas and reduce resource waste.

[0047] Example 2

[0048] This embodiment provides a car, including the engine thermal power generation system as described in Embodiment 1.

[0049] Example 3

[0050] Based on the same inventive concept as Example 1, this embodiment provides a thermal power generation method based on the engine thermal power generation system described in Example 1. Since the principle of solving the problem by this method is similar to that of the aforementioned engine thermal power generation system based on Example 1, the implementation of this method can refer to the implementation of the engine thermal power generation system based on Example 1.

[0051] like Figure 2 As shown, the thermal power generation method of the engine thermal power generation system includes:

[0052] S1, obtain the temperature inside the exhaust pipe and the remaining power of the battery pack.

[0053] S2, determining whether the temperature inside the exhaust pipe is greater than a preset temperature and whether the remaining power of the battery pack is less than a preset power.

[0054] S3: If the temperature is greater than the preset temperature and less than the preset power, the first relay is controlled to close the circuit between the thermal power generation module and the battery pack, and the operation of S1 is returned to be executed.

[0055] S4, if the temperature is not greater than the preset temperature or not less than the preset power, the first relay is controlled to disconnect the circuit between the thermal power generation module and the battery pack, and the operation of S1 is returned to be executed.

[0056] Example 4

[0057] Based on the same inventive concept as Example 1, this embodiment provides a thermal power generation device based on the engine thermal power generation system described in Example 1. Since the principle of solving the problem by this device is similar to that of the aforementioned engine thermal power generation system based on Example 1, the implementation of this device can refer to the implementation of the engine thermal power generation system based on Example 1.

[0058] like Figure 3 As shown, the thermal power generation device based on the engine thermal power generation system described in Example 1 includes:

[0059] The acquisition module 10 is used to obtain the temperature inside the exhaust pipe and the remaining power of the battery pack.

[0060] The judgment module 20 is used to judge whether the temperature inside the exhaust pipe is greater than a preset temperature and whether the remaining power of the battery pack is less than a preset power.

[0061] The first control module 30 is used to control the first relay to close the circuit between the thermal power generation module and the battery pack, and return to execute the operation of the acquisition module when the judgment module determines that the temperature is greater than a preset temperature and less than a preset power.

[0062] The second control module 40 is used to control the first relay to disconnect the circuit between the thermal power generation module and the battery pack and return to execute the operation of the acquisition module when the judgment module determines that the temperature is not greater than the preset temperature or not less than the preset power.

[0063] For more specific working processes of the above modules, please refer to the corresponding contents disclosed in Example 3, which will not be repeated here.

[0064] Example 5

[0065] This embodiment provides a computer device, including a processor and a memory; wherein the processor implements the steps of the thermal power generation method described in Embodiment 3 when executing a computer program stored in the memory.

[0066] For more specific details of the above method, please refer to the corresponding contents disclosed in Example 3, which will not be repeated here.

[0067] Example 6

[0068] This embodiment provides a computer-readable storage medium for storing a computer program; when the computer program is executed by a processor, the steps of the thermal power generation method described in Embodiment 3 are implemented.

[0069] For more specific details of the above method, please refer to the corresponding contents disclosed in Example 3, which will not be repeated here.

[0070] Example 7

[0071] This embodiment provides a computer program product, including computer executable instructions or a computer program. When the computer executable instructions or the computer program are executed by a processor, the steps of the thermal power generation method described in Embodiment 3 are implemented.

[0072] For more specific details of the above method, please refer to the corresponding contents disclosed in Example 3, which will not be repeated here.

[0073] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the devices, equipment, storage media and computer program products disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0074] Those skilled in the art can clearly understand that the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention or some parts of the embodiments.

[0075] In some embodiments, computer executable instructions may be in the form of a program, software, software module, script or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine or other unit suitable for use in a computing environment.

[0076] As an example, computer-executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or code portions).

[0077] As an example, computer executable instructions may be deployed to be executed on one electronic device, or on multiple electronic devices located at one site, or on multiple electronic devices distributed at multiple sites and interconnected by a communication network.

[0078] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. An engine thermal power generation system, characterized in that: It comprises a thermal power generation module (1), a temperature sensor (2), a battery controller (3) and a battery pack (4); The thermal power generation module (1) is electrically connected to the battery pack (4); one end of the thermal power generation module (1) is located inside the exhaust pipe (5), and the other end is located outside the exhaust pipe (5); the temperature sensor (2) is arranged on the exhaust pipe (5) and electrically connected to the battery controller (3), and is used to collect the internal temperature of the exhaust pipe (5) and transmit it to the battery controller (3); A first relay (6) is provided on the circuit between the thermal power generation module (1) and the battery pack (4); the battery controller (3) is electrically connected to the first relay (6); the battery controller (3) is electrically connected to the battery pack (4) for detecting the remaining power of the battery pack (4); The battery controller (3) is used to control the first relay (6) to close the circuit between the thermal power generation module (1) and the battery pack (4) when it is detected that the internal temperature of the exhaust pipe (5) is greater than a preset temperature and the remaining power of the battery pack (4) is less than a preset power, or to control the first relay (6) to disconnect the circuit between the thermal power generation module (1) and the battery pack (4) when it is detected that the internal temperature of the exhaust pipe (5) is not greater than a preset temperature or the remaining power of the battery pack (4) is not less than a preset power.

2. The engine thermal power generation system according to claim 1, characterized in that: The thermal power generation module (1) comprises a plurality of thermoelectric conversion devices (11); the plurality of thermoelectric conversion devices (11) are arranged on the exhaust pipe (5) and are electrically connected to the battery pack (4) after being connected in parallel.

3. The engine thermal power generation system according to claim 1, characterized in that: The battery pack (4) comprises two battery packs (41) connected in parallel; a second relay (7) is provided on the circuit of the two battery packs (41) connected in parallel; the battery controller (3) is electrically connected to the second relay (7) to control the second relay (7) to open or close the circuit of the two battery packs (41) connected in parallel.

4. A car, characterized in that: It comprises the engine thermal power generation system as described in any one of claims 1 to 3.

5. A thermal power generation method based on the engine thermal power generation system according to any one of claims 1 to 3, characterized in that: include: S1, obtaining the temperature inside the exhaust pipe and the remaining power of the battery pack; S2, determining whether the temperature inside the exhaust pipe is greater than a preset temperature and whether the remaining power of the battery pack is less than a preset power; S3, if the temperature is greater than the preset temperature and less than the preset power, control the first relay to close the circuit between the thermal power generation module and the battery pack, and return to execute the operation of S1; S4, if the temperature is not greater than the preset temperature or not less than the preset power, the first relay is controlled to disconnect the circuit between the thermal power generation module and the battery pack, and the operation of S1 is returned to be executed.

6. A thermal power generation device based on the engine thermal power generation system according to any one of claims 1 to 3, characterized in that: include: An acquisition module is used to obtain the temperature inside the exhaust pipe and the remaining power of the battery pack; A judgment module, used to judge whether the temperature inside the exhaust pipe is greater than a preset temperature and whether the remaining power of the battery pack is less than a preset power; A first control module, configured to control a first relay to close a circuit between the thermal power generation module and the battery pack, and return to execute the operation of the acquisition module when the judgment module determines that the temperature is greater than a preset temperature and less than a preset power. The second control module is used to control the first relay to disconnect the circuit between the thermal power generation module and the battery pack and return to execute the operation of the acquisition module when the judgment module determines that the temperature is not greater than the preset temperature or not less than the preset power.

7. A computer device, characterized in that: It comprises a processor and a memory; wherein, when the processor executes the computer program stored in the memory, the steps of the thermal power generation method described in claim 5 are implemented.

8. A computer-readable storage medium, characterized in that: Used to store computer programs; when the computer programs are executed by the processor, the steps of the thermal power generation method according to claim 5 are implemented.

9. A computer program product, characterized in that The method comprises computer executable instructions or a computer program, and when the computer executable instructions or the computer program are executed by a processor, the steps of the thermal power generation method according to claim 5 are implemented.

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