New energy locomotive power battery thermal guarantee device

Abstract

The invention discloses a new energy locomotive power battery heat guarantee device, and relates to the technical field of rail transit heat exchange, the new energy locomotive power battery heat guarantee device comprises a frame body, the frame body is used for being connected with a locomotive, the frame body is provided with a condensation chamber, the condensation chamber is internally provided with a fan, a dry cooler, a condenser and a compressor, and the dry cooler is provided with a first pipeline for circulation of a first medium; the first pipeline is used for being communicated with a heat exchange pipeline of the battery, the condenser is provided with a second pipeline for a second medium to circulate, the compressor is in fluid communication with the second pipeline, and the fan is used for enabling gas to flow in the condensation chamber and to perform heat exchange with the first medium, the second medium and the compressor. According to the technical scheme, the dry cooler, the condenser and the compressor are cooled through the same draught fan, the situation that the condensation cavity is occupied by the multiple draught fans is effectively reduced, therefore, the space in the condensation cavity is effectively utilized, and then the space occupied by a locomotive is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit heat exchange, and particularly relates to a thermal protection device for a power battery of a new energy locomotive. Background Art

[0002] As the core energy source of a new energy locomotive, the performance of the power battery directly affects the overall performance and cruising range of the locomotive. The power battery needs to be regulated in temperature by a thermal protection device so that the power battery is in a suitable working temperature range to effectively ensure its performance, safety, and extend the service life of the power battery.

[0003] To maintain the power battery working in a suitable working temperature range, not only a cooling circuit needs to be configured to cool the power battery, but also a heating circuit needs to be configured to heat the power battery so that the temperature of the power battery is maintained within a controllable range.

[0004] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems: In the existing system, multiple independent devices are usually used to achieve the cooling and heating of the power battery, occupying a large amount of space on the locomotive. Moreover, the dry cooler and the condenser are independent of each other, and fans need to be configured for the dry cooler and the condenser respectively, resulting in a large space occupation.

[0005] Therefore, how to effectively improve the occupation of the locomotive space is a technical problem that those skilled in the art need to solve currently. Summary of the Invention

[0006] The purpose of the present invention is to provide a thermal protection device for a power battery of a new energy locomotive, which can effectively improve the problem of occupying the locomotive space.

[0007] To achieve the above purpose, the present invention provides a thermal protection device for a power battery of a new energy locomotive, including a frame body for connecting with the locomotive. The frame body is provided with a condensation chamber, in which a fan, a dry cooler, a condenser, and a compressor are arranged. The dry cooler is provided with a first pipeline for the first medium to flow through, and the first pipeline is used to communicate with the heat exchange pipeline of the battery. The condenser is provided with a second pipeline for the second medium to flow through, and the compressor is connected to the second pipeline. The fan is used to make the gas flow in the condensation chamber and exchange heat with the first medium, the second medium, and the compressor.

[0008] In a possible design, the condensation chamber includes two relatively arranged air inlet sides and an air outlet side corresponding to the air outlet of the fan, and the air outlet side is located between the two air inlet sides;

[0009] At least one air inlet side is provided with a dry cooler, and / or at least one air inlet side is provided with a condenser.

[0010] In a possible design, the dry cooler and / or the condenser is arranged tilted relative to the fan rotation axis.

[0011] In a possible design, there are two dry coolers, and the two dry coolers are arranged in parallel, and the two dry coolers are respectively located at two air inlet sides; and / or,

[0012] There are two condensers, and the two condensers are arranged in parallel, and the two condensers are respectively located at the two air inlet sides.

[0013] In a possible design, when a dry cooler and a condenser are provided on the same air inlet side, the condenser is located on the side of the dry cooler away from the air inlet side, so that the gas passes through the dry cooler and the condenser in sequence when entering the condensation chamber from outside the condensation chamber;

[0014] The dry cooler is integrated with the condenser.

[0015] In a possible design, the compressor is arranged adjacent to the fan, and the compressor is located between the two air inlet sides. A gas-liquid separator is also provided in the condensation chamber, and the outlet of the gas-liquid separator is fluidly connected to the inlet of the compressor.

[0016] In a possible design, a first cover plate is provided at the air outlet side of the condensation chamber, and a second cover plate is provided at the air inlet side of the condensation chamber, and at least a portion of the second cover plate is arranged at an angle to the rotation axis of the fan.

[0017] In a possible design, the frame also includes an evaporation chamber, a heat exchanger is provided in the evaporation chamber, and a first flow channel and a second flow channel are provided inside the heat exchanger. The first flow channel is used for the circulation of a first medium, and the second flow channel is used for the circulation of a second medium, so that the first medium and the second medium flowing into the heat exchanger can exchange heat.

[0018] In a possible design, an electric heater is provided in the evaporation chamber, a heating pipe of the electric heater is connected to the first flow channel, and the electric heater is used to heat the first medium flowing through the first flow channel into the heating pipe.

[0019] In a possible design, there are two electric heaters, and the two electric heaters are arranged in parallel.

[0020] In one possible design, the outlet ends of all heating pipes are connected to the inlet end of the third pipe, and the outlet end of the third pipe is provided with two parallel coolant outlets. The two coolant outlets are used to connect with the inlet ends of different heat exchange pipelines so that the first medium can flow into the heat exchange pipeline.

[0021] In one possible design, the electric heater is also electrically connected to an electric control box, which is rotatably connected to the frame and can be rotated relative to the frame to an open state or a closed state. The frame is connected to a support rod, and the end of the support rod facing away from the frame can be connected to the electric control box in an open state to keep the electric control box in an open state.

[0022] In a possible design, the frame further includes two side covers that are arranged opposite to each other, and an evaporation cover plate located between the two side covers, and the evaporation cover plate and the side covers are used to seal the evaporation chamber.

[0023] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0024] A dry cooler provided with a first pipeline, a condenser provided with a second pipeline, and a compressor connected to the second pipeline are integrated in the same condensing chamber, and a fan arranged in the condensing chamber is operated to make the gas flow in the condensing chamber and exchange heat with the first medium in the first pipeline, the second medium in the second pipeline for exchanging heat with the first medium, and the compressor connected to the second pipeline, so that the first medium exchanges heat with the battery after flowing to the heat exchange pipeline connected to the first pipeline. Through the integrated design, the same fan can cool the dry cooler, the condenser and the compressor, effectively improving the occupation of the condensing chamber by multiple fans, thereby effectively utilizing the space in the condensing chamber and reducing the occupation of the locomotive space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be 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 the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a thermal protection device for a new energy locomotive power battery provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the internal structure of a thermal protection device for a power battery of a new energy locomotive provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the structure of an evaporation chamber provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of a coolant inlet and a coolant outlet provided in an embodiment of the present invention.

[0030] in:

[0031] 1 - Frame, 101 - Condensing chamber, 102 - First cover plate, 103 - Second cover plate, 104 - Evaporation chamber, 105 - Side cover, 106 - Evaporation cover plate, 107 - Liquid filling cover plate, 108 - Unit outlet;

[0032] 2 - Fan;

[0033] 3 - Dry cooler;

[0034] 4 - Condenser;

[0035] 5 - Compressor;

[0036] 6 - Gas - liquid separator;

[0037] 7 - Heat exchanger;

[0038] 8 - Electric heater;

[0039] 9 - Coolant inlet;

[0040] 10 - Coolant outlet;

[0041] 11 - Electric control box, 111 - Connector;

[0042] 12 - Dry filter;

[0043] 13 - Expansion tank;

[0044] 14 - Water pump;

[0045] 15 - Liquid line filter;

[0046] 16 - Bracing rod. Specific embodiments

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "inner", "outer", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0050] The object of the present invention is to provide a thermal protection device for a power battery of a new energy locomotive, which can effectively improve the occupation of the locomotive space.

[0051] Please refer to Figure 1 and Figure 3 For achieving the above object, the present invention provides a thermal protection device for a power battery of a new energy locomotive, including a frame body 1, which is used for connecting with the locomotive to realize the overhead installation of the thermal protection device on the top of the locomotive. The frame body 1 is provided with a condensation chamber 101. The frame body 1 includes a bottom plate and a plurality of side plates connected to the bottom plate, and can be connected to the top of the locomotive through the bottom plate to fix the frame body 1. The condensation chamber 101 is formed by enclosing with the side plates and part of the bottom plate, and has a certain accommodation space. A fan 2, an air cooler 3, a condenser 4 and a compressor 5 are arranged in the condensation chamber 101. The air cooler 3, the condenser 4 and the compressor 5 share the same fan 2. The air cooler 3 is provided with a first pipeline for the first medium to flow through, and the first pipeline is used for communicating with the heat exchange pipeline of the battery, so that the first medium flowing into the heat exchange pipeline can heat or cool the battery. The condenser 4 is provided with a second pipeline for the second medium to flow through, and the compressor 5 is in fluid communication with the second pipeline. The compressor 5 is used for converting the low-temperature and low-pressure gas into high-temperature and high-pressure gas, so that it can be condensed into a liquid after flowing into the condenser 4 subsequently. The second medium is used for exchanging heat with the first medium in the following heat exchanger 7 to reduce the temperature of the first medium. The fan 2 is used for making the gas flow in the condensation chamber 101 and exchanging heat with the first medium, the second medium and the compressor 5. Among them, no partition for blocking the gas flow is arranged in the condensation chamber 101 to ensure that the gas can fully contact with the air cooler 3, the condenser 4 and the compressor 5, and effectively take away the redundant heat of the air cooler 3, the condenser 4 and the compressor 5.

[0052] Integrate the dry cooler 3 provided with the first pipeline, the condenser 4 provided with the second pipeline, and the compressor 5 communicated with the second pipeline in the same condensation chamber 101, and operate the fan 2 arranged in the condensation chamber 101, so that the gas flows in the condensation chamber 101 and exchanges heat with the first medium in the first pipeline, the second medium used to exchange heat with the first medium in the second pipeline, and the compressor 5 fluidly communicated with the second pipeline, effectively taking away the excess heat of the dry cooler 3, the condenser 4, and the compressor 5, effectively reducing the temperature of the motor parts of the dry cooler 3, the condenser 4, and the compressor 5, and further effectively reducing the temperature of the second medium and the first medium, for the first medium to flow to the heat exchange pipeline communicated with the first pipeline and exchange heat with the battery. Through the integrated design, the same fan 2 is used to cool the dry cooler 3, the condenser 4, and the compressor 5, effectively improving the occupation of the condensation chamber 101 by multiple fans 2, thus effectively utilizing the space in the condensation chamber 101, further reducing the occupation of the locomotive space, and also effectively improving the utilization rate of natural cold sources, which is beneficial to energy conservation. At the same time, the fan 2 accelerates the heat exchange efficiency between the outer shell of the compressor 5 and the surrounding air through forced convection, effectively improving the phenomenon that the heat of the compressor 5 cannot be dissipated in the frame 1, resulting in a decline in the overall system efficiency or even triggering a chain of failures, and effectively ensuring the service life of the compressor 5.

[0053] In one embodiment, the condensation chamber 101 includes two relatively arranged air inlet sides and an air outlet side corresponding to the air outlet of the fan 2. The air outlet side is located between the two air inlet sides. The two relatively arranged air inlet sides can expand the air inlet area and effectively reduce the problem of uneven air flow distribution caused by too high or too low air speed during single-sided air inlet. By having the air outlet side located between the two air inlet sides, the distance between the air outlet side and the air inlet side can be shortened, facilitating the gas at each position in the condensation chamber 101 to disperse along the air outlet side, effectively improving the gas flow effect in the condensation chamber 101. It should be noted that independent air ducts do not need to be additionally provided for the air inlet side and the air outlet side, and the ventilation holes provided on the frame 1 can be directly utilized. At least one air inlet side is provided with the dry cooler 3, and / or at least one air inlet side is provided with the condenser 4. By arranging at least one of the dry cooler 3 and the condenser 4 at the air inlet side, it is convenient to directly exchange heat with the gas outside the condensation chamber 101. For example, when there is air flow on the outer surface of the frame 1 during the operation of the EMU, heat exchange can be directly carried out with the dry cooler 3 and the condenser 4 at the air inlet side, reducing the use of the fan 2 and being beneficial to energy conservation. In addition, when the gas enters the condensation chamber 101 to take away heat, generally the temperature of the gas at the air inlet side is lower, and compared with other positions, the heat exchange efficiency of the dry cooler 3 or the condenser 4 at the air inlet side is higher.

[0054] In one embodiment, a first cover plate 102 is provided at the air outlet side of the condensation chamber 101, and a second cover plate 103 is provided at the air inlet side of the condensation chamber 101. The first cover plate 102 is provided with a first ventilation hole for discharging the air flow from the outlet of the fan 2 out of the condensation chamber 101. The second cover plate 103 is provided with a second ventilation hole in a mesh structure, which can be used for air to enter the condensation chamber 101 and can also block impurities in the air. At least a part of the second cover plate 103 is arranged at an angle with respect to the rotation axis of the fan 2, which can effectively prevent the air flow direction into the condensation chamber 101 from being perpendicular to the rotation axis of the fan 2, so as to guide the air flow to various positions in the condensation chamber 101. At the same time, through the inclination of a part of the second cover plate 103 with respect to the rotation axis of the fan 2, the overall volume of the frame 1 can be effectively reduced; the dry cooler 3 and / or the condenser 4 are arranged obliquely with respect to the rotation axis of the fan 2 to correspond to the second cover plate 103, so as to make the gas flowing into the condensation chamber 101 from the air inlet side flow vertically to the dry cooler 3 and the condenser 4, thereby improving the heat dissipation effect of the dry cooler 3 and the condenser 4.

[0055] In one embodiment, there are two dry coolers 3, and the two dry coolers 3 are arranged in parallel. The two dry coolers 3 are respectively located at two air inlet sides and are arranged in an "eight" shape. By one dry cooler 3 exchanging heat at one air inlet side and the other dry cooler 3 exchanging heat at the other air inlet side, the heat exchange efficiency of the dry cooler 3 can be effectively improved. At the same time, when one of the dry coolers 3 fails, the other dry cooler 3 can still ensure the normal operation of the entire device. There are two condensers 4, and the two condensers 4 are arranged in parallel. The two condensers 4 are respectively located at two air inlet sides and are arranged in an "eight" shape. By one condenser 4 exchanging heat at one air inlet side and the other condenser 4 exchanging heat at the other air inlet side, the heat exchange efficiency of the condenser 4 can be effectively improved. At the same time, when one of the condensers 4 fails, the other condenser 4 can still ensure the normal operation of the entire device.

[0056] It should be noted that when the dry cooler 3 and the condenser 4 are both provided at the same air inlet side, the condenser 4 is located on the side of the dry cooler 3 away from the air inlet side, so that when the gas enters the condensation chamber 101 from outside the condensation chamber 101, it passes through the dry cooler 3 and the condenser 4 in sequence, which can effectively prevent a large amount of heat from being taken away when the air passes through the condenser 4 first, resulting in ineffective cooling of the dry cooler 3. When both the dry cooler 3 and the condenser 4 use fins for heat dissipation, the dry cooler 3 and the condenser 4 can be set to share a set of fins, so that even when only one of the dry cooler 3 and the condenser 4 is operating, the fins can be fully utilized to improve the heat exchange efficiency of the dry cooler 3 or the condenser 4. Among them, the dry cooler 3 and the condenser 4 are integrated into one body.

[0057] In one embodiment, the dry cooler 3 and the condenser 4 are arranged in the radial direction of the fan 2, and the two air inlet sides are located on the opposite sides in the radial direction of the fan 2. The compressor 5 is arranged adjacent to the fan 2 and is located between the two air inlet sides, so that the air flow entering the condensation chamber 101 along the two air inlet sides can exchange heat with the compressor 5. By arranging the compressor 5 adjacent to the fan 2, the flow rate of the air flow at the compressor 5 is increased, effectively improving the cooling efficiency of the compressor 5. A gas-liquid separator 6 and a dryer filter 12 are also provided in the condensation chamber 101 to improve the space utilization rate in the condensation chamber 101. The outlet of the gas-liquid separator 6 is in fluid communication with the inlet of the compressor 5. The gas-liquid separator 6 is used to separate gas and liquid and prevent the liquid second medium from entering the compressor 5. The dryer filter 12 is used to filter impurities in the second medium to prevent the impurities in the second medium from affecting the function of the expansion valve in the following refrigeration circuit.

[0058] In one embodiment, the frame body 1 further includes an evaporation chamber 104. The evaporation chamber 104 and the condensation chamber 101 can be separated by a partition. When the fan 2 operates, it is easy to form a negative pressure environment in the condensation chamber 101. A heat exchanger 7 is provided in the evaporation chamber 104. The heat exchanger 7 can be, but is not limited to, a plate heat exchanger 7. A first flow channel and a second flow channel that are spaced apart from each other and can exchange heat with each other are provided inside the heat exchanger 7. The first flow channel is used for the first medium to flow through, and the second flow channel is used for the second medium to flow through, so that the first medium and the second medium flowing into the heat exchanger 7 exchange heat; a water pump 14 and a circulation pipeline are also provided in the frame body 1. A valve body is provided on the circulation pipeline to control the flow direction of the first medium in the circulation pipeline to the first flow channel and / or the first pipeline. When the first medium flows to the first flow channel, it can exchange heat with the second medium in the second flow channel to reduce its own temperature. When the first medium flows to the first pipeline and the fan 2 operates, the first medium can be cooled by the flow of air. The inlet end of the circulation pipeline is used to communicate with the outlet end of the heat exchange pipeline of the battery. The water pump 14 is arranged on the circulation pipeline to provide power for the circulating flow of the first medium.

[0059] It should be noted that the compressor 5, the second pipeline of the condenser 4, the expansion valve, the second flow channel of the heat exchanger 7, the gas-liquid separator 6, and the corresponding pipelines form a refrigeration circuit. A second medium is filled in the refrigeration circuit. The second medium is a refrigerant. Under the driving force provided by the compressor 5, the refrigerant can achieve the following circulation path: compressor 5 - second pipeline of condenser 4 - expansion valve - second flow channel of heat exchanger 7 - compressor 5, so as to realize the refrigeration cycle. The expansion valve can be, but is not limited to, an electronic expansion valve. The refrigeration circuit is configured with a frequency converter, and the frequency converter is electrically connected to the compressor 5 to control the frequency conversion operation of the compressor 5 according to the refrigeration requirement.

[0060] Please refer to Figure 2, in one embodiment, an electric heater 8 is provided in the evaporation chamber 104. The heating pipeline of the electric heater 8 is communicated with the first flow channel. The electric heater 8 is used to heat the first medium flowing into the heating pipeline through the first flow channel. The outlet ends of the first pipeline and all the heating pipelines are communicated with the inlet end of the third pipeline. The outlet end of the third pipeline is used to be docked with the inlet end of the heat exchange pipeline for the first medium to flow into the heat exchange pipeline. It should be noted that an expansion tank 13 is also connected to the flow pipeline. The expansion tank 13 is used to buffer the volume change of the first medium caused by the thermal expansion and contraction of the first medium. The first medium is a coolant. Among them, the water pump 14, the expansion tank 13, the first pipeline of the dry cooler 3 and the corresponding pipelines form a first liquid cooling loop. The water pump 14, the expansion tank 13, the first flow channel of the heat exchanger 7, the electric heater 8 and the corresponding pipelines form a second liquid cooling loop. The coolant from the heat exchange pipeline can be selectively communicated with the first pipeline of the dry cooler 3 and / or the first flow channel of the heat exchanger 7. That is, the first liquid cooling loop and the second liquid cooling loop can be selectively used. A liquid path filter 15 is also provided in the evaporation chamber 104. The liquid path filter 15 is used to filter the coolant entering the first liquid cooling loop and the second liquid cooling loop to prevent impurities in the coolant from affecting the operation of the water pump 14 and the heat exchanger 7. In addition, one end of the first pipeline is connected to the upstream of the first flow channel, and the other end of the first pipeline is connected to the downstream of the heating pipeline.

[0061] Please refer to Figure 4 , there are two electric heaters 8, and the two electric heaters 8 are arranged in parallel to improve the heating efficiency of the electric heater 8, and one electric heater 8 can be turned on only according to the actual heating requirement to reduce energy consumption. There are two parallel coolant outlets 10 at the outlet end of the third pipeline. The two coolant outlets 10 are used to be docked with the inlet ends of different heat exchange pipelines. And there are two parallel coolant inlets 9 at the inlet end of the flow pipeline for docking with the outlet ends of different heat exchange pipelines, for the first medium to flow into the first liquid cooling loop and the second liquid cooling loop, and the battery temperature is regulated through the coolant. Each of the coolant outlet 10 and the coolant inlet 9 is configured with two paths, and both the coolant outlet 10 and the coolant inlet 9 are connected to the heat exchange pipeline of the locomotive power battery in a parallel manner, which is beneficial to improving the circulation rate of the coolant to further improve the thermal management effect of the power battery, and at the same time has the interface redundancy function, improving the overall reliability of the device.

[0062] When the battery needs to be cooled, the electric heater 8 can be turned off and the fan 2 can be turned on. The refrigerant flows along the first liquid cooling circuit and / or the second liquid cooling circuit, and flows to the heat exchange pipeline to cool the battery after cooling through the dry cooler 3 and / or the heat exchanger 7; when the battery needs to be heated, the electric heater 8 can be turned on and the fan 2 can be turned off. The refrigerant flows along the second liquid cooling circuit, and flows to the heat exchange pipeline to heat the battery after heating through the electric heater 8. It should be noted that turning off the electric heater 8 does not block the circulation of the first medium, that is, turning off the electric heater 8 only turns off the heating function.

[0063] In one embodiment, the electric heater 8 is also electrically connected to an electric control box 11, which is rotatably connected to the frame 1 and can be rotated relative to the frame 1 to an open state or a closed state. The rotatable connection between the electric control box 11 and the frame 1 can be hinged, and a support rod 16 is provided on the frame 1, and a support rod seat is provided on the electric control box 11. The end of the support rod 16 away from the frame 1 can be connected to the support rod seat of the electric control box 11 in the open state, so as to keep the electric control box 11 in the open state, that is, the electric control box 11 and the frame 1 maintain a certain rotation angle. The maintenance space is used to maintain the components on the frame 1 (such as the electric heater 8) and the electrical components at the bottom of the electric control box 11 (such as the cooling fan). The air flow in the maintenance space can also be used to dissipate the heat of the components on the frame 1 and the electric control box 11. The electric control box 11 is provided with a connector 111 for cable connection. The frame 1 is also provided with two spaced unit outlets 108 for the cables to pass through the frame 1 to connect to an external power source.

[0064] In one embodiment, the frame 1 further includes two side covers 105 arranged opposite to each other, and an evaporation cover 106 located between the two side covers 105. The evaporation cover 106 and the side covers 105 are used to close the evaporation chamber 104. A liquid filling cover 107 can be provided on the side covers 105 and the evaporation cover 106 for filling the expansion water tank 13 with coolant.

[0065] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] In this article, specific examples are used to elaborate on the principles and implementation modes of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A thermal protection device for the power battery of a new energy locomotive, characterized in that, The invention comprises a frame (1), wherein the frame (1) is used to be connected to a locomotive, the frame (1) is provided with a condensing chamber (101), the condensing chamber (101) is provided with a fan (2), a dry cooler (3), a condenser (4) and a compressor (5), the dry cooler (3) is provided with a first pipeline for circulating a first medium, the first pipeline is used to communicate with a heat exchange pipeline of a battery, the condenser (4) is provided with a second pipeline for circulating a second medium, the compressor (5) is connected with the second pipeline, and the fan (2) is used to make gas flow in the condensing chamber (101) and exchange heat with the first medium, the second medium and the compressor (5).

2. The thermal protection device for the power battery of the new energy locomotive according to claim 1, characterized in that, The condensation chamber (101) comprises two air inlet sides arranged opposite to each other, and an air outlet side corresponding to an air outlet of the fan (2), wherein the air outlet side is located between the two air inlet sides; At least one of the air inlet sides is provided with the dry cooler (3), and / or at least one of the air inlet sides is provided with the condenser (4).

3. The thermal protection device for the power battery of a new energy locomotive according to claim 1, characterized in that, The dry cooler (3) and / or the condenser (4) are arranged tilted relative to the rotation axis of the fan (2).

4. The thermal protection device for the power battery of the new energy locomotive according to claim 2, characterized in that, There are two dry coolers (3), and the two dry coolers (3) are arranged in parallel, and the two dry coolers (3) are respectively located at the two air inlet sides; and / or, There are two condensers (4), and the two condensers (4) are arranged in parallel. The two condensers (4) are respectively located at the two air inlet sides.

5. The thermal protection device for the power battery of the new energy locomotive according to claim 2, wherein, When the dry cooler (3) and the condenser (4) are provided on the same air inlet side, the condenser (4) is located on a side of the dry cooler (3) away from the air inlet side, so that the gas passes through the dry cooler (3) and the condenser (4) in sequence when entering the condensation chamber (101) from outside the condensation chamber (101); The dry cooler (3) and the condenser (4) are integrated into one body.

6. The thermal protection device for the power battery of the new energy locomotive according to claim 2, characterized in that, The compressor (5) is arranged adjacent to the fan (2), and the compressor (5) is located between the two air inlet sides. A gas-liquid separator (6) is also provided in the condensation chamber (101), and the outlet of the gas-liquid separator (6) is fluidically connected to the inlet of the compressor (5).

7. The thermal protection device for the power battery of the new energy locomotive according to claim 2, characterized in that, A first cover plate (102) is provided at the air outlet side of the condensation chamber (101), and a second cover plate (103) is provided at the air inlet side of the condensation chamber (101), wherein at least a portion of the second cover plate (103) is arranged at an angle to the rotation axis of the fan (2).

8. The thermal protection device for the power battery of the new energy locomotive according to any one of claims 1-7, characterized in that, The frame (1) further comprises an evaporation chamber (104), a heat exchanger (7) being arranged in the evaporation chamber (104), a first flow channel and a second flow channel being arranged in a spaced relationship inside the heat exchanger (7), the first flow channel being used for allowing a first medium to flow, and the second flow channel being used for allowing a second medium to flow, so that the first medium and the second medium flowing into the heat exchanger (7) can exchange heat.

9. The thermal protection device for the power battery of the new energy locomotive according to claim 8, characterized in that, An electric heater (8) is provided in the evaporation chamber (104); a heating pipe of the electric heater (8) is connected to the first flow channel; the electric heater (8) is used to heat a first medium flowing through the first flow channel into the heating pipe.

10. The thermal protection device for the power battery of the new energy locomotive according to claim 9, wherein, There are two electric heaters (8), and the two electric heaters (8) are arranged in parallel.

11. The thermal protection device for the power battery of a new energy locomotive according to claim 9, wherein, The outlet ends of all the heating pipes are connected to the inlet end of the third pipe, and the outlet end of the third pipe is provided with two parallel coolant outlets (10). The two coolant outlets (10) are used to connect with the inlet ends of different heat exchange pipelines so as to allow the first medium to flow into the heat exchange pipelines.

12. The thermal protection device for the power battery of the new energy locomotive according to claim 9, wherein, The electric heater (8) is also electrically connected to an electric control box (11), the electric control box (11) is rotatably connected to the frame (1) and can be rotated relative to the frame (1) to an open state or a closed state, the frame (1) is connected to a support rod (16), and one end of the support rod (16) facing away from the frame (1) can be connected to the electric control box (11) in the open state, so that the electric control box (11) maintains the open state.

13. The thermal protection device for the power battery of the new energy locomotive according to claim 8, characterized in that, The frame (1) further comprises two side covers (105) arranged opposite to each other, and an evaporation cover plate (106) located between the two side covers (105); the evaporation cover plate (106) and the side covers (105) are used to seal the evaporation chamber (104).

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