Hybrid power supply device for starting vehicle with temperature control function

Abstract

The utility model provides a composite power supply device with a temperature adjusting function for vehicle starting, and relates to the technical field of power supply. The composite power supply device comprises a box body, a semiconductor temperature adjusting module, a starting power supply module, an energy storage module and a control module. The starting power supply module, the energy storage module and the control module are arranged in the box body, and the starting power supply module and the energy storage module are electrically connected through the control module; and the semiconductor temperature adjusting module is arranged on the box body. By arranging the starting power supply module and the energy storage module, a composite power supply mode is realized, and the performance of the power supply device can be effectively improved; and by arranging the semiconductor temperature adjusting module, higher-precision and more stable temperature adjustment can be realized. On the basis, the problem that the starting requirement of the vehicle in a low-temperature environment cannot be met due to the fact that an existing common power supply scheme is insufficient in self power supply performance and temperature adjusting mode is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a composite power supply device for vehicle starting with a temperature regulating function. Background Art

[0002] The success or failure of vehicle startup and whether there will be any adverse effects during startup are related to temperature. Specifically, the problem of vehicle cold start is prone to occur in lower ambient temperatures, that is, starting the vehicle when the engine water temperature is low. This problem will damage the vehicle's driving ability and affect the service life of the engine. It may also cause the vehicle to fail to start. In fact, whether the starter (series motor) can drive the engine to start is entirely determined by the power supply voltage and its output current capacity - the higher the power supply voltage and the higher the motor speed, the stronger the power supply output current capacity and the greater the output torque; therefore, to achieve normal starting of the engine under low temperature conditions, the output voltage and output current capacity of the power supply play a decisive role. However, in order to reduce the cold start problem, the commonly used technical means currently proposed from the power supply perspective in the existing technology have limitations. Specifically:

[0003] Traditional cold-start technology solutions for lead-acid batteries focus on improving battery performance in low-temperature environments. These solutions often utilize new positive lead paste technology, vacuum formation technology, and pure lead battery technology, all of which help improve the cold-start performance of lead-acid batteries. However, lead-acid batteries also have significant shortcomings, such as being relatively heavy, which hinders lightweight vehicle design, having a short service life resulting in higher costs, containing heavy metal lead, which makes them highly polluting, and having low charging efficiency.

[0004] To address these shortcomings, the industry is exploring the use of lighter, more environmentally friendly, and more efficient lithium batteries. While lithium battery systems address some of the issues with lead-acid batteries, their temperature sensitivity requires the introduction of insulation, heating, and cooling technologies. For example, Chinese patent publication number CN111416180A provides a lithium battery constant temperature control thermal management system and its use method. Through the rational arrangement of a battery box, heat exchange mechanism, heating mechanism, water pump, water tank, cooling structure, and control mechanism, accurate control of the lithium battery's temperature in different seasons is achieved, allowing the vehicle to maintain an optimal operating temperature range in both hot and cold weather.

[0005] However, in actual applications, this power supply solution that only uses lithium batteries has gradually exposed some problems that are difficult to ignore, such as the inability to take into account both large capacity and high discharge rate, the high risk of thermal runaway leading to great safety hazards, and the large temperature difference between batteries affecting battery performance and service life. In addition, the currently commonly used cooling and heating devices for lithium batteries also have shortcomings. Specifically: for example, in the patent with publication number CN111416180A, a liquid heating / cooling method is adopted. This method usually uses a more complex structure and there is a risk of liquid leakage, which may cause a battery short circuit. Or the air heating / cooling method commonly used in the prior art, although the structure is relatively simple, but the heating / cooling efficiency is relatively poor, and it is difficult to meet the thermal management requirements of high power density batteries.

[0006] In summary, the present invention provides a vehicle starting composite power supply device with a temperature regulation function. Utility Model Content

[0007] The purpose of the present utility model is to provide a composite power supply device for starting a vehicle with a temperature control function, so as to solve the problem mentioned in the above background technology that the existing commonly used power supply solutions cannot meet the starting requirements of the vehicle in a low-temperature environment due to the shortcomings of their own power supply performance and temperature control methods.

[0008] The utility model is realized by adopting the following technical solutions:

[0009] A composite power supply device for vehicle starting with a temperature control function comprises a housing, a semiconductor temperature control module, a starting power supply module, an energy storage module and a control module; the starting power supply module, the energy storage module and the control module are arranged inside the housing, and the starting power supply module and the energy storage module are electrically connected via the control module; the semiconductor temperature control module is arranged on the housing.

[0010] The composite power supply device provided by the present invention has two major improvements. Based on this, the composite power supply device can provide a flexible output voltage and achieve good temperature regulation, thereby meeting the starting requirements of vehicles in low-temperature environments. Specifically: First, instead of using the traditional single power supply form, a starting power supply module and an energy storage module are separately provided. The starting power supply module can use a large-capacity, high-current, and high-power density energy storage device, and the starting power supply module can be used to specifically achieve vehicle engine starting, including in low-temperature environments; the energy storage module can use a high-energy density energy storage device, and the energy storage module can perform normal charging and discharging and energy storage. The combination of the two can achieve complementary advantages and disadvantages, thereby effectively improving the performance of the power supply device while taking into account economic efficiency. Second, instead of using traditional liquid heating / cooling or air heating / cooling methods, a semiconductor temperature control module is provided, which can achieve higher-precision and more stable temperature regulation, and has overcurrent, overvoltage, overheating and other protection functions, which can improve the safety of the power supply device.

[0011] Furthermore, the starting power supply module includes a plurality of supercapacitors, and the energy storage module includes a plurality of lithium-ion batteries.

[0012] In the above scheme, supercapacitors have the advantages of high power density, fast discharge, good low-temperature characteristics, long service life, energy saving and environmental protection, and adaptability to harsh environments. They can output high power for a short time, thereby meeting the vehicle's demand for power output voltage during cold start in a low-temperature environment; lithium-ion batteries have the characteristics of high energy density, low self-discharge rate, and long life, and can provide stable electricity and long-term power supply.

[0013] Furthermore, the control module includes a controller, a DC-DC converter, a current sensor, a voltage sensor and a temperature sensor.

[0014] In the above solution, the control module is used to achieve energy transfer and flexible adjustment of the output voltage between the starting power supply module and the energy storage module. Among them, the controller is used to control the operation of each module in the entire power supply device. Charging through the DC-DC converter can increase the terminal voltage of the starting power supply module. The current sensor, voltage sensor and temperature sensor are used to monitor the current, voltage and temperature of the energy storage module during charging and discharging.

[0015] Furthermore, the positive terminal of the energy storage module is electrically connected to the input positive terminal of the control module, the output positive terminal of the control module is electrically connected to the positive terminal of the starting power supply module, and the negative terminal of the energy storage module, the input negative terminal of the control module and the negative terminal of the starting power supply module are connected in sequence; the positive terminal of the starting power supply module extends to the total positive pole of the power supply and is connected in parallel with the total positive pole of the external vehicle electrical system, and the negative terminal of the starting power supply module extends to the total negative pole of the power supply and is connected in parallel with the total negative pole of the external vehicle electrical system.

[0016] Furthermore, the semiconductor temperature control module includes a processor and a temperature control execution component communicatively connected to the processor, the temperature control execution component includes a temperature sensor and a semiconductor temperature control piece, and the semiconductor temperature control piece includes an electrically connected heat exchange component and a thermocouple.

[0017] In this solution, the processor generates instructions and controls the operation of the thermostat. The temperature sensor in the thermostat monitors the temperature of the composite power supply in real time, while the semiconductor thermostat regulates the temperature. By changing the direction of the current flowing through the semiconductor thermostat, the device can be operated in either an absorbing or releasing mode, achieving either a cooling or heating effect.

[0018] Furthermore, the heat exchange component includes a working end metal plate, a release end metal plate I and a release end metal plate II, and the thermocouple includes an N-type semiconductor and a P-type semiconductor; the N-type semiconductor is electrically connected between the working end metal plate and the release end metal plate I, and the P-type semiconductor is electrically connected between the working end metal plate and the release end metal plate II.

[0019] The beneficial effects achieved by the present invention are:

[0020] A composite power supply device for vehicle starting with a temperature control function is provided. By providing a starting power supply module and an energy storage module, a composite power supply mode is realized, which can effectively improve the performance of the power supply device, enabling it to have a higher power supply voltage and a stronger output current capacity, while also taking into account a large energy storage effect and economical efficiency. By providing a semiconductor temperature control module, higher precision and more stable temperature control can be achieved, allowing the composite power supply device to maintain good working performance under relatively extreme temperature conditions. Therefore, compared with existing power supply solutions with insufficient power supply performance and temperature control methods, the present invention can provide a flexible output voltage and achieve good temperature control effects, thereby meeting the starting requirements of vehicles in low temperature environments, thereby ensuring, to a certain extent, the starting effect of vehicles under various temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the composite power supply device according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure and connection relationship of the starting power supply module, energy storage module and control module according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic structural diagram of the semiconductor temperature regulating piece according to an embodiment of the present utility model;

[0024] In the figure: 1. positive terminal of lithium-ion battery pack; 2. positive terminal of control module input; 3. positive terminal of control module output; 4. positive terminal of supercapacitor pack; 5. total positive pole of power supply; 6. lithium-ion battery cell; 7. negative terminal of lithium-ion battery pack; 8. negative terminal of control module input; 9. supercapacitor cell; 10. negative terminal of supercapacitor pack; 11. total negative pole of power supply; 12. working end metal plate; 13. N-type semiconductor; 14. release end metal plate I; 15. power supply end I; 16. power supply end II; 17. release end metal plate II; 18. P-type semiconductor; 19. energy storage module; 20. control module; 21. starting power supply module; 22. semiconductor temperature control module; 23. box. DETAILED DESCRIPTION

[0025] To clearly illustrate the solution in the utility model, the following is further described with reference to the accompanying drawings:

[0026] Example 1

[0027] Please refer to Figure 1 This embodiment provides a vehicle starting composite power supply device with a temperature control function, including a housing 23, a semiconductor temperature control module 22, a starting power supply module 21, an energy storage module 19, and a control module 20; the starting power supply module 21, the energy storage module 19, and the control module 20 are arranged inside the housing 23, and the starting power supply module 21 and the energy storage module 19 are electrically connected through the control module 20; the semiconductor temperature control module 22 is arranged on the housing 23.

[0028] Specifically:

[0029] Please refer to Figure 2 In this embodiment, the starting power supply module 21 includes 12 supercapacitor strings, each consisting of 12 supercapacitor cells 9 connected in series. The energy storage module 19 includes 8 lithium-ion battery strings, each consisting of 8 lithium-ion battery cells 6 connected in series. The control module 20 includes a controller, a current sensor, a voltage sensor, and a temperature sensor. The nominal voltage of the 12 supercapacitor strings is 36V, and the nominal voltage of the 8 lithium-ion battery strings is 25.6V, with a voltage range of 20V to 29.2V.

[0030] The positive terminal 1 of the lithium-ion battery pack is electrically connected to the positive input terminal 2 of the control module, the positive output terminal 3 of the control module is electrically connected to the positive terminal 4 of the supercapacitor group, the positive terminal 4 of the supercapacitor group extends to the total positive pole 5 of the power supply and is connected in parallel with the total positive pole of the external vehicle electrical system, the negative terminal 7 of the lithium-ion battery pack, the negative input terminal 8 of the control module and the negative terminal 10 of the supercapacitor group are connected in sequence, and the negative terminal 10 of the supercapacitor group extends to the total negative pole 11 of the power supply and is connected in parallel with the total negative pole of the external vehicle electrical system.

[0031] In this embodiment, two semiconductor temperature control modules 22 are provided on the housing 23. Each semiconductor temperature control module 22 includes a processor and a temperature control execution component connected to the processor. The temperature control execution component includes a temperature sensor and a semiconductor temperature control sheet. The semiconductor temperature control sheet includes an electrically connected heat exchange component and a thermocouple. Figure 3 The heat exchange component includes a working end metal plate 12, a release end metal plate I 14 and a release end metal plate II 17, and the thermocouple includes an N-type semiconductor 13 and a P-type semiconductor 18; in the above structure, one side of the working end metal plate 12 is connected to the lithium-ion battery cell 6, and the other side is connected to one end of the N-type semiconductor 13 and the P-type semiconductor 18 respectively, the other ends of the N-type semiconductor 13 and the P-type semiconductor 18 are connected to one side of the release end metal plate I 14 and the release end metal plate II 17 respectively, and the other sides of the release end metal plate I 14 and the release end metal plate II 17 are connected to the power supply terminal I 15 and the power supply terminal II 16 respectively.

[0032] The above structure can realize charging and discharging control and vehicle starting control, wherein charging and discharging control includes charging control and discharging control, and vehicle starting control includes non-cold start control and cold start control. Specifically:

[0033] Under normal temperature conditions, charging control is achieved: when the voltage between the total positive pole 5 of the power supply and the total negative pole 11 of the power supply exceeds 27V or the current sensor detects that the composite power supply device is charging, the engine of the external vehicle supplies power to the external vehicle electrical system and charges the supercapacitor group; the control module 20 switches to the charging mode of the 8-string lithium-ion battery pack. During the operation of this mode, the control module 20 monitors the charging current, charging voltage and battery cell temperature; when the temperature of the lithium-ion battery pack is higher than the cooling set value, the semiconductor temperature control module 22 is switched to the cooling mode. When the temperature of the lithium-ion battery pack is higher than the maximum operating temperature set value, the control module 20 stops the charging mode and restarts the charging mode when the temperature returns to the working allowable temperature set value.

[0034] Under normal temperature conditions, discharge control is achieved: when the voltage between the total positive pole 5 of the power supply and the total negative pole 11 of the power supply is lower than 25V or the current sensor detects that the composite power supply device is discharging, the composite power supply device supplies power to the external vehicle electrical system; the control module 20 switches to the discharge mode from the 8-string lithium-ion battery pack. During the operation of this mode, the control module 20 monitors the discharge current, discharge voltage and battery cell temperature; when the temperature of the lithium-ion battery pack is higher than the cooling set value, the semiconductor temperature control module 22 is switched to the cooling mode. Conversely, when the temperature of the lithium-ion battery pack is higher than the maximum operating temperature set value, the control module 20 stops the discharge mode and restarts the discharge mode when the temperature returns to the working allowable temperature set value.

[0035] Under normal temperature conditions, non-cold start control is achieved: when starting the vehicle, all the starting energy is provided by the 12-string supercapacitor group alone to start the vehicle's engine; after the engine starts normally, the engine supplies power to the vehicle's electrical system and charges the supercapacitor group; after determining that the engine output voltage is stable and the status of the lithium-ion battery group meets the charging requirements, the control module 20 switches to the charging mode under normal temperature conditions to charge the lithium-ion battery group.

[0036] Cold start control is achieved under extremely cold working conditions: when the outside temperature drops below -30°C, the vehicle has been stationary for more than 12 hours, and the current sensor detects a discharge of about 100A (discharge due to vehicle intake preheating or fuel tank heating), the composite power supply device adjusts the output voltage and quickly increases the voltage between the total positive electrode 5 and the total negative electrode 11 of the power supply to 32V, so that the starting voltage of the supercapacitor group reaches or exceeds the output voltage of the external vehicle engine; after completing this operation, a signal is sent to the driver, indicating that the vehicle start-up state is ready and the vehicle can be started; the composite power supply device provides starting energy to start the engine of the external vehicle; when the engine is started, the engine supplies power to the external vehicle electrical system and charges the supercapacitor group; the semiconductor temperature control module 22 switches to the heating mode, and after using the power supply of the engine to heat the lithium-ion battery pack to a rechargeable temperature, the control module 20 switches to the charging mode for the lithium-ion battery pack.

[0037] Among them, the principle of the semiconductor temperature control module 22 executing the heating mode or the cooling mode is as follows: when the power supply terminal I15 is connected to the positive pole of the power supply and the power supply terminal II16 is connected to the negative pole of the power supply, the current flows from the power supply terminal II16 to the power supply terminal I15, the working end metal plate 12 absorbs heat from the surroundings, and the release end metal plate I14 and the release end metal plate II17 release heat and start cooling; conversely, when the power supply terminal II16 is connected to the positive pole of the power supply and the power supply terminal I15 is connected to the negative pole of the power supply, the current flows from the power supply terminal I15 to the power supply terminal II16, the release end metal plate I14 and the release end metal plate II17 absorb heat, and the working end metal plate 12 releases heat and starts heating.

[0038] It should be noted that the parts that are not described in detail or in detail in the above scheme, such as the specific control principles of the control module over other modules, are all existing technologies, do not belong to the improvements made by the present invention on the existing technologies, nor do they fall within the scope of protection of the technical scheme of the present invention. Therefore, they will not be repeated in this article.

[0039] Of course, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by ordinary technicians in this technical field within the essential scope of the present invention should all fall within the scope of the patent of the present invention.

Claims

1. A composite power supply device for starting a vehicle with a temperature control function, characterized in that: The invention comprises a box (23), a semiconductor temperature control module (22), a starting power supply module (21), an energy storage module (19) and a control module (20); the starting power supply module (21), the energy storage module (19) and the control module (20) are arranged inside the box (23); the starting power supply module (21) and the energy storage module (19) are electrically connected via the control module (20); the semiconductor temperature control module (22) is arranged on the box (23); The starting power supply module (21) includes a plurality of supercapacitors, and the energy storage module (19) includes a plurality of lithium-ion batteries; The positive terminal of the energy storage module (19) is electrically connected to the input positive terminal of the control module (20), the output positive terminal of the control module (20) is electrically connected to the positive terminal of the starting power supply module (21), and the negative terminal of the energy storage module (19), the input negative terminal of the control module (20), and the negative terminal of the starting power supply module (21) are connected in sequence; the positive terminal of the starting power supply module (21) extends to the total positive pole of the power supply (5) and is connected in parallel with the total positive pole of the external vehicle electrical system, and the negative terminal of the starting power supply module (21) extends to the total negative pole of the power supply (11) and is connected in parallel with the total negative pole of the external vehicle electrical system.

2. The vehicle starting composite power supply device with temperature control function according to claim 1, characterized in that: The control module (20) includes a controller, a DC-DC converter, a current sensor, a voltage sensor and a temperature sensor.

3. The vehicle starting composite power supply device with temperature control function according to claim 1, characterized in that: The semiconductor temperature control module (22) includes a processor and a temperature control execution component communicatively connected to the processor, the temperature control execution component includes a temperature sensor and a semiconductor temperature control piece, and the semiconductor temperature control piece includes an electrically connected heat exchange component and a thermocouple.

4. The vehicle starting composite power supply device with temperature control function according to claim 3, characterized in that: The heat exchange component comprises a working end metal plate (12), a release end metal plate I (14) and a release end metal plate II (17); the thermocouple comprises an N-type semiconductor (13) and a P-type semiconductor (18); the N-type semiconductor (13) is electrically connected between the working end metal plate (12) and the release end metal plate I (14), and the P-type semiconductor (18) is electrically connected between the working end metal plate (12) and the release end metal plate II (17).

Images