Battery electric locomotive temperature management device

Abstract

This utility model discloses a temperature management device for a battery-powered traction locomotive, comprising: a motor temperature management system, a battery temperature management system, and a waste heat recovery and heat exchange system. The motor temperature management system has a first loop and a second loop connected in parallel. The battery temperature management system includes a battery system coolant circulation loop and a battery coolant cooling circulation loop, which are connected by a plate heat exchanger. The second loop and the battery system coolant circulation loop are connected by the waste heat recovery and heat exchange system. The motor temperature management system of this utility model has two loops: the first loop cools the motor; the second loop cools the motor while simultaneously recovering and exchanging the high-temperature coolant through the waste heat recovery and heat exchange system, using the waste heat to raise the temperature of the coolant in the battery system coolant circulation loop, thereby reducing the heating energy consumption of the battery system.

Description

Technical Field

[0001] This utility model relates to the field of battery-powered traction locomotives, and in particular to a temperature management device for battery-powered traction locomotives. Background Technology

[0002] Battery-powered traction locomotives are equipped with both battery and motor systems, with the batteries typically being lithium-ion batteries. Maintaining the optimal operating temperature range for lithium-ion batteries is crucial for their efficient and stable operation; abnormal temperatures directly impact energy efficiency, cycle life, and safety, especially during fast charging and high-rate discharging scenarios where strict temperature control is necessary. Therefore, battery systems are usually equipped with temperature management systems to heat and cool the batteries.

[0003] Meanwhile, the motors and motor controllers of battery-powered traction locomotives generate a lot of heat during operation, which affects the lifespan of the motors and electronic components. Therefore, the motors need to be equipped with a temperature management system to cool down the motors and motor controllers.

[0004] In the high temperatures of summer, both the battery and the motor require cooling. In the low temperatures of winter, the motor needs cooling, but the battery needs heating. Battery heating is typically achieved using heating films or liquid heating; however, this process results in significant energy consumption, impacting the vehicle's range. Therefore, minimizing energy loss due to battery heating in winter is a pressing technical challenge.

[0005] Therefore, there is an urgent need to provide a solution for a battery-powered traction locomotive temperature management device. Utility Model Content

[0006] To address the above problems, this utility model provides a temperature management device for battery-powered traction locomotives. By recovering the heat generated during motor operation, it reduces the heating energy consumption of the battery system, ultimately achieving a reduction in the operating energy consumption of the battery-powered traction locomotive.

[0007] According to a first aspect of the present invention, a battery-powered traction locomotive temperature management device is provided, comprising: a motor temperature management system, a battery temperature management system, and a waste heat recovery and heat exchange system.

[0008] The motor temperature management system has a first circuit and a second circuit connected in parallel. The first circuit includes a first water pump, a motor controller, a traction motor, and a radiator. The outlet of the first water pump is connected to the inlet of the motor controller, the outlet of the motor controller is connected to the inlet of the traction motor, the outlet of the traction motor is connected to the inlet of the radiator, and the outlet of the radiator is connected to the inlet of the first water pump.

[0009] The battery temperature management system includes a battery system coolant circulation loop and a battery coolant cooling circulation loop, which are connected by a plate heat exchanger.

[0010] The second circuit and the battery system coolant circulation circuit are connected through a waste heat recovery heat exchange system.

[0011] In the above scheme, the motor temperature management system is equipped with an electronic three-way valve;

[0012] The liquid outlet of the traction motor is connected to the liquid inlet of the radiator through the electronic three-way valve. The liquid outlet of the traction motor is connected to the first liquid inlet of the waste heat recovery heat exchange system through the electronic three-way valve. The first liquid outlet of the waste heat recovery heat exchange system is connected to the liquid inlet of the radiator.

[0013] In the above scheme, a first temperature sensor is provided between the first water pump and the motor controller, and a second temperature sensor is provided between the traction motor and the electronic three-way valve.

[0014] In the above scheme, the battery system cooling circulation loop includes a PTC heater, a second water pump, and a battery pack;

[0015] The outlet of the PTC heater is connected to the inlet of the second water pump, and the outlet of the second water pump is connected to the inlet of the battery pack.

[0016] In the above scheme, a third temperature sensor and a fourth temperature sensor are respectively provided at the liquid inlet and liquid outlet of the battery pack.

[0017] In the above scheme, the battery coolant cooling circulation loop includes a compressor and a condenser.

[0018] In the above scheme, the liquid outlet of the battery pack is connected to the second liquid inlet of the waste heat recovery heat exchange system, and the second liquid outlet of the waste heat recovery heat exchange system is connected to the first liquid inlet of the plate heat exchanger.

[0019] In the above scheme, the first liquid outlet end of the plate heat exchanger is connected to the liquid inlet end of the PTC heater.

[0020] In the above scheme, the liquid outlet of the condenser is connected to the second liquid inlet of the plate heat exchanger, and the second liquid outlet of the plate heat exchanger is connected to the liquid inlet of the compressor.

[0021] In the above scheme, the waste heat recovery heat exchange system includes a waste heat recovery heat exchanger.

[0022] The beneficial effects of this utility model are:

[0023] This utility model discloses a temperature management device for a battery-powered traction locomotive. The motor temperature management system has two loops. The first loop is used in high-temperature environments in summer to cool the motor. The second loop is used in low-temperature environments in winter to cool the motor. At the same time, the high-temperature coolant is recovered and heated through a waste heat recovery system. The waste heat is used to raise the temperature of the coolant in the battery system's coolant circulation loop, reducing the heating energy consumption of the battery system. Ultimately, this reduces the operating energy consumption of the battery-powered traction locomotive and helps to increase the locomotive's range. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the battery-powered traction locomotive temperature management device provided by this utility model.

[0026] Among them, 1-radiator, 2-first water pump, 3-motor controller, 4-traction motor, 5-electronic three-way valve, 6-compressor, 7-condenser, 8-plate heat exchanger, 9-PTC heater, 10-second water pump, 11-battery pack, 12-waste heat recovery heat exchange system, 13-first temperature sensor, 14-second temperature sensor, 15-third temperature sensor, 16-fourth temperature sensor.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0029] The terms "first," "second," etc., used in this disclosure are for distinguishing similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0030] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0031] Multiple, including two or more.

[0032] And / or, it should be understood that, for the purposes of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0033] One embodiment of the present invention provides a temperature management device for a battery-powered traction locomotive, comprising: a motor temperature management system, a battery temperature management system, and a waste heat recovery and heat exchange system;

[0034] like Figure 1 As shown, the motor temperature management system has a first circuit and a second circuit connected in parallel. The first circuit includes a first water pump 2, a motor controller 3, a traction motor 4, and a radiator 1. The outlet of the first water pump 2 is connected to the inlet of the motor controller 3, the outlet of the motor controller 3 is connected to the inlet of the traction motor 4, the outlet of the traction motor 4 is connected to the inlet of the radiator 1, and the outlet of the radiator 1 is connected to the inlet of the first water pump 2.

[0035] The battery temperature management system includes a battery system coolant circulation loop and a battery coolant cooling circulation loop, which are connected by a plate heat exchanger 8.

[0036] The second loop and the battery system coolant circulation loop are connected through the waste heat recovery heat exchange system 12.

[0037] Furthermore, the motor temperature management system is equipped with an electronic three-way valve 5, which controls the motor temperature management system to complete the coolant circulation in the first or second circuit.

[0038] The liquid outlet of the traction motor 4 is connected to the liquid inlet of the radiator 1 through the electronic three-way valve 5. The liquid outlet of the traction motor 4 is connected to the first liquid inlet of the waste heat recovery heat exchange system 12 through the electronic three-way valve 5. The first liquid outlet of the waste heat recovery heat exchange system 12 is connected to the liquid inlet of the radiator 1.

[0039] In summer, both the battery and motor require cooling due to high temperatures, while in winter, the motor requires cooling, but the battery requires heating. Therefore, the motor temperature management system has two loops. The first loop is used in summer to cool the motor, while the second loop is used in winter to cool the motor. Simultaneously, the high-temperature coolant is recovered and heated by the waste heat recovery system 12, which then heats the coolant in the battery system's coolant circulation loop. This reduces the battery system's heating energy consumption, ultimately lowering the energy consumption of the battery-powered traction locomotive and helping to increase its driving range.

[0040] In this preferred embodiment, a first temperature sensor 13 is provided between the first water pump 2 and the motor controller 3, and a second temperature sensor 14 is provided between the traction motor 4 and the electronic three-way valve 5. The motor controller 3 is used to control the switching of the traction motor 4. The motor controller 3 is connected to the first temperature sensor 13 and the second temperature sensor 14 to receive temperature information sent by the first temperature sensor 13 and the second temperature sensor 14. When the temperature is greater than a first threshold, the motor controller 3 controls the traction motor 4 to shut down, and the vehicle performs an emergency stop. The motor temperature management system can also be connected to an external alarm device. The alarm device is electrically connected to the motor controller 3 to control the switching of the alarm device. When the temperature sent by the first temperature sensor 13 and the second temperature sensor 14 received by the motor controller 3 is greater than a second threshold, the alarm device is activated. The second threshold is less than the first threshold. The alarm device can remind the user to cool down the battery temperature management system to prevent the temperature from rising again and forcing an emergency stop of the vehicle. In this preferred embodiment, the second threshold is 50~55℃, and the first threshold is 60~65℃.

[0041] The battery system cooling circulation loop includes a PTC heater 9, a second water pump 10, and a battery pack 11. The outlet of the PTC heater 9 is connected to the inlet of the second water pump 10, and the outlet of the second water pump 10 is connected to the inlet of the battery pack 11.

[0042] In this preferred embodiment, a third temperature sensor 15 and a fourth temperature sensor 16 are respectively provided at the inlet and outlet ends of the battery pack 11 to detect the temperature of the battery pack 11. The second water pump 10 is controlled by an external controller, which is connected to the third and fourth temperature sensors 15 and 16. The controller receives temperature information from the third and fourth temperature sensors 15 and 16. When the temperature exceeds a third threshold, the controller activates the second water pump 10, allowing coolant to flow into the pipeline to cool the battery pack 11. In this preferred embodiment, the third threshold is 30~35℃.

[0043] The battery coolant cooling circulation loop includes a compressor 6 and a condenser 7. The first outlet of the plate heat exchanger 8 is connected to the inlet of the PTC heater 9. The outlet of the condenser 7 is connected to the second inlet of the plate heat exchanger 8, and the second outlet of the plate heat exchanger 8 is connected to the inlet of the compressor 6.

[0044] In high-temperature summer environments, the coolant in the battery system's cooling circulation loop cools the battery pack 11, becoming a high-temperature coolant. After passing through the plate heat exchanger 8, the high-temperature coolant becomes a low-temperature coolant and returns to the second water pump 10, completing the closed-loop circuit. The compressor 6 and the water pump in the battery coolant cooling circulation loop start simultaneously. The coolant in the battery coolant cooling circulation loop passes through the plate heat exchanger 8, becoming a high-temperature coolant. The compressor 6 then introduces the high-temperature coolant into the condenser 7 for cooling, and subsequently, it becomes a low-temperature coolant and returns to the plate heat exchanger 8 to cool the battery system's coolant.

[0045] The liquid outlet of the battery pack 11 is connected to the second liquid inlet of the waste heat recovery heat exchange system 12, and the second liquid outlet of the waste heat recovery heat exchange system 12 is connected to the first liquid inlet of the plate heat exchanger 8.

[0046] In this preferred embodiment, the waste heat recovery heat exchange system 12 includes a waste heat recovery heat exchanger.

[0047] The specific usage of the battery-powered traction locomotive temperature management device provided by this utility model is as follows:

[0048] During summer operation, both the motor temperature management system and the battery temperature management system require cooling. The first water pump 2 in the motor temperature management system starts, allowing the low-temperature coolant to pass through the motor controller 3 and the motor to cool them. Then, it passes through the radiator 1, lowering the high-temperature coolant to a low temperature before returning to the water pump, forming a loop. During this process, the first temperature sensor 13 and the second temperature sensor 14 on the coolant lines at the inlet of the motor controller 3 and the outlet of the traction motor 4 are monitored. When the temperature of the motor controller 3 and the motor exceeds 55°C, the motor temperature management system triggers an alarm. When the temperature of the motor controller 3 and the motor exceeds 65°C, the vehicle initiates an emergency shutdown.

[0049] Simultaneously, the battery temperature management system monitors the temperature of the battery pack 11 through the third temperature sensor 15 and the fourth temperature sensor 16. When the temperature of the battery pack 11 exceeds 30°C, the second water pump 10 in the battery system coolant circulation loop starts, passing the low-temperature coolant through the battery pack 11 and cooling it down. The low-temperature coolant becomes high-temperature coolant. After passing through the unactivated waste heat recovery heat exchange system 12, the coolant enters the plate heat exchanger 8, where it becomes low-temperature coolant and returns to the second water pump 10, completing the closed-loop circuit. The compressor 6 in the battery coolant cooling circulation loop connected to the plate heat exchanger 8 starts simultaneously with the second water pump 10. The coolant in the battery coolant cooling circulation loop becomes high-temperature coolant after passing through the plate heat exchanger 8. The compressor 6 then introduces the high-temperature coolant into the condenser 7 for cooling, and subsequently returns to the plate heat exchanger 8 as low-temperature coolant to cool the battery system coolant.

[0050] When the locomotive is running in winter, the motor temperature management system still requires cooling. The electronic three-way valve 5 in its pipeline is switched so that the coolant undergoes waste heat recovery and heat exchange through the waste heat recovery system 12. After the first water pump 2 starts, the low-temperature coolant passes through the motor controller 3 and the motor to cool both. Then, through the electronic three-way valve 5, the high-temperature coolant first passes through the waste heat recovery and heat exchange system 12, undergoing waste heat recovery and heat exchange while also being cooled once. The coolant, having completed its first cooling step, enters the radiator 1 for a second cooling step. The coolant, after its second cooling step, returns to the first water pump 2, forming a loop.

[0051] During this process, the battery temperature management system requires heating. The coolant in the battery system's coolant circulation loop is first heated by the waste heat recovery heat exchange system 12, and then secondly heated by the activated PTC heater 9, ultimately becoming a high-temperature coolant. This high-temperature coolant is pumped into the battery pack 11 to heat it. The heated coolant then becomes a low-temperature coolant and re-enters the waste heat recovery heat exchange system 12 to form a loop. During this process, the compressor 6 does not start in the battery coolant cooling circulation loop. This measure, by heating the battery coolant through the waste heat recovery heat exchange system 12, reduces the energy consumption of the PTC heater 9, thereby reducing the energy consumption of battery temperature management.

[0052] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0053] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0054] Through the above description of the embodiments, those skilled in the art can clearly understand that the above implementation methods can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this utility model, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this utility model.

[0055] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A temperature management device for a battery-hauled locomotive, comprising: include: Motor temperature management system, battery temperature management system, and waste heat recovery heat exchange system; The motor temperature management system has a first circuit and a second circuit connected in parallel. The first circuit includes a first water pump, a motor controller, a traction motor, and a radiator. The outlet of the first water pump is connected to the inlet of the motor controller, the outlet of the motor controller is connected to the inlet of the traction motor, the outlet of the traction motor is connected to the inlet of the radiator, and the outlet of the radiator is connected to the inlet of the first water pump. The battery temperature management system includes a battery system coolant circulation loop and a battery coolant cooling circulation loop, which are connected by a plate heat exchanger. The second circuit and the battery system coolant circulation circuit are connected through a waste heat recovery heat exchange system.

2. The battery-hauled locomotive temperature management device of claim 1, wherein, The motor temperature management system is equipped with an electronic three-way valve; The liquid outlet of the traction motor is connected to the liquid inlet of the radiator through the electronic three-way valve. The liquid outlet of the traction motor is connected to the first liquid inlet of the waste heat recovery heat exchange system through the electronic three-way valve. The first liquid outlet of the waste heat recovery heat exchange system is connected to the liquid inlet of the radiator.

3. The battery-powered traction locomotive temperature management device according to claim 2, characterized in that, A first temperature sensor is provided between the first water pump and the motor controller, and a second temperature sensor is provided between the traction motor and the electronic three-way valve.

4. The battery-hauled locomotive temperature management device of claim 1, wherein, The battery system cooling circulation loop includes a PTC heater, a second water pump, and a battery pack; The outlet of the PTC heater is connected to the inlet of the second water pump, and the outlet of the second water pump is connected to the inlet of the battery pack.

5. The battery-hauled locomotive temperature management device of claim 4, wherein, The battery pack is equipped with a third temperature sensor and a fourth temperature sensor at the inlet and outlet ends, respectively.

6. The battery-hauled locomotive temperature management device of claim 1, wherein, The battery coolant cooling circulation loop includes a compressor and a condenser.

7. The battery-hauled locomotive temperature management device of claim 4, wherein, The liquid outlet of the battery pack is connected to the second liquid inlet of the waste heat recovery heat exchange system, and the second liquid outlet of the waste heat recovery heat exchange system is connected to the first liquid inlet of the plate heat exchanger.

8. The battery-hauled locomotive temperature management device of claim 4, wherein, The first liquid outlet of the plate heat exchanger is connected to the liquid inlet of the PTC heater.

9. The battery-hauled locomotive temperature management device of claim 6, wherein, The liquid outlet of the condenser is connected to the second liquid inlet of the plate heat exchanger, and the second liquid outlet of the plate heat exchanger is connected to the liquid inlet of the compressor.

10. The battery-hauled locomotive temperature management device of claim 1, wherein, The waste heat recovery heat exchange system includes a waste heat recovery heat exchanger.

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