New energy mine car

Abstract

The invention discloses a new energy mine car. The new energy mine car comprises a power battery, an engine and a heat exchange system. The heat exchange system comprises a battery heat exchanger and an engine heat exchanger. The battery heat exchanger comprises a channel for a first heat exchange medium to flow so as to exchange heat for the power battery. The engine heat exchanger comprises a channel for a second heat exchange medium to flow so as to exchange heat for the engine. The battery heat exchanger and the engine heat exchanger are connected in an on-off mode. And when the temperature of the power battery is lower than a first set value, the battery heat exchanger communicates with the engine heat exchanger, and the second heat exchange medium enters the battery heat exchanger to heat the power battery. And when the temperature of the power battery is not lower than the first set value, the engine heat exchanger and the battery heat exchanger are disconnected. When the temperature of the power battery is low due to the low operating temperature, the battery heat exchanger is associated with the engine heat exchanger, so that the second heat exchange medium enters the battery heat exchanger to heat the power battery, and the overall operating efficiency and reliability of the engineering machinery are improved.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a new energy mining car. Background Art

[0002] With the continuous development of clean energy and intelligent technology, new energy mining cars have developed rapidly. Compared with traditional mining cars, the heat sources of new energy and intelligent mining cars have added power batteries, generators, drive motors and electronic control systems, DC-DC converters (DC-DC) and other heat sources in addition to the engine. The heat sources that need to be dissipated by the whole machine have increased and become more difficult to control. Therefore, integrated processing of the heat dissipation of the whole machine and reducing the energy consumption of the whole machine have become important directions for the thermal management of the whole vehicle.

[0003] It should be noted that the statements in this background technology section only provide background technology related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] The present application provides a new energy mining car to improve the operating efficiency of the new energy mining car.

[0005] The present application provides a new energy mining car, which includes a power battery, an engine and a heat exchange system, and the heat exchange system includes a battery heat exchanger and an engine heat exchanger. The battery heat exchanger includes a channel for a first heat exchange medium to flow for heat exchange for the power battery. The engine heat exchanger includes a channel for a second heat exchange medium to flow for heat exchange for the engine. The battery heat exchanger and the engine heat exchanger can be connected on and off. When the temperature of the power battery is lower than a first set value, the battery heat exchanger and the engine heat exchanger are connected, and the second heat exchange medium enters the battery heat exchanger to heat the power battery. When the temperature of the power battery is not lower than the first set value, the engine heat exchanger and the battery heat exchanger are disconnected.

[0006] In some embodiments, the power battery has a normal operating temperature range, and the first set value is lower than a lower limit of the normal operating temperature range.

[0007] In some embodiments, the heat exchange system includes a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is connected to the inlet of the engine heat exchanger, and the other end of the first connecting pipe is connected to the outlet of the battery heat exchanger. One end of the second connecting pipe is connected to the inlet of the battery heat exchanger, and the other end of the second connecting pipe is connected to the outlet of the engine heat exchanger.

[0008] In some embodiments, the heat exchange system further includes a first on-off valve and a second on-off valve. The first on-off valve and the second on-off valve are respectively arranged on the first connecting pipeline and the second connecting pipeline. The first on-off valve and the second on-off valve are respectively used to control the on-off state of the first connecting pipeline and the second connecting pipeline.

[0009] In some embodiments, the new energy mine car also includes a wheel drive system and an operating motor system. The wheel drive system is connected to the wheel hub drive of the new energy mine car. The wheel drive system is used to provide driving force for the wheel hub to drive the new energy mine car to move. The operating motor system is used to provide power for the operating mechanism in the new energy mine car. The operating mechanism includes a hydraulic system. The heat exchange system also includes a wheel motor heat exchanger and an operating motor heat exchanger. The wheel motor heat exchanger includes a channel for the flow of a third heat exchange medium to exchange heat for the wheel drive system. The operating motor heat exchanger includes a channel for the flow of a fourth heat exchange medium to exchange heat for the operating motor system. The wheel motor heat exchanger and the operating motor heat exchanger can be connected in an on-off manner, so that the fourth heat exchange medium can enter the wheel motor heat exchanger to increase the heat exchange capacity of the wheel motor heat exchanger, or the third heat exchange medium can enter the operating motor heat exchanger to increase the heat exchange capacity of the operating motor heat exchanger.

[0010] In some embodiments, the new energy mining car has a pure electric state. In the pure electric state, the power in the new energy mining car is all provided by the power battery. When the new energy mining car is in the pure electric state, when the temperature of the wheel-side drive system exceeds the second set value, the pipeline between the wheel-side motor heat exchanger and the working motor heat exchanger is connected to allow the fourth heat exchange medium to enter the wheel-side motor heat exchanger to improve the heat exchange capacity of the wheel-side motor heat exchanger.

[0011] In some embodiments, the heat exchange system further includes a working motor system heat exchange pump. The working motor system heat exchange pump is fluidically connected to the working motor heat exchanger. The working motor system heat exchange pump is used to pump the fourth heat exchange medium, and the working motor system heat exchange pump is configured to control the flow rate of the fourth heat exchange medium. When the new energy mining car is driving in a pure electric state, when the temperature of the wheel-side drive system exceeds the second set value, the working motor system heat exchange pump increases the flow rate of the fourth heat exchange medium.

[0012] In some embodiments, when the new energy mining car is in a stationary operating state, when the temperature of the working motor system exceeds a third set value, the wheel-side motor heat exchanger and the working motor heat exchanger are connected to allow the third heat exchange medium to enter the working motor heat exchanger to increase the heat exchange capacity of the working motor heat exchanger.

[0013] In some embodiments, the heat exchange system also includes a wheel-side drive system heat exchange pump. The wheel-side drive system heat exchange pump is fluidically connected to the wheel-side motor heat exchanger. The wheel-side drive system heat exchange pump is used to pump a third fluid, and the wheel-side drive system heat exchange pump is configured to control the flow rate of the third heat exchange medium. Under the condition that the new energy mining car is in a stationary operating state, when the temperature of the operating motor system exceeds the third set value, the wheel-side drive system heat exchange pump increases the flow rate of the third heat exchange medium.

[0014] In some embodiments, the heat exchange system includes a third connecting pipeline and a fourth connecting pipeline. One end of the third connecting pipeline is connected to the outlet of the working motor heat exchanger, and the other end of the third connecting pipeline is connected to the outlet of the wheel-side motor heat exchanger. One end of the fourth connecting pipeline is connected to the inlet of the working motor heat exchanger, and the other end of the fourth connecting pipeline is connected to the inlet of the wheel-side motor heat exchanger.

[0015] In some embodiments, the heat exchange system further includes a third on-off valve and a fourth on-off valve. The third on-off valve and the fourth on-off valve are respectively arranged on the third connecting pipeline and the fourth connecting pipeline. The third on-off valve and the fourth on-off valve are respectively used to control the on-off state of the third connecting pipeline and the fourth connecting pipeline.

[0016] Based on the technical solution provided in this application, the new energy mining car includes a power battery, an engine and a heat exchange system, and the heat exchange system includes a battery heat exchanger and an engine heat exchanger. The battery heat exchanger includes a channel for the flow of a first heat exchange medium to exchange heat for the power battery. The engine heat exchanger includes a channel for the flow of a second heat exchange medium to exchange heat for the engine. The battery heat exchanger and the engine heat exchanger can be connected on and off. When the temperature of the power battery is lower than the first set value, the battery heat exchanger and the engine heat exchanger are connected, and the second heat exchange medium enters the battery heat exchanger to heat the power battery. When the temperature of the power battery is not lower than the first set value, the engine heat exchanger and the battery heat exchanger are disconnected. When the operating temperature of the new energy mining car is low (for example, in winter) and the temperature of the power battery is low, the battery heat exchanger and the engine heat exchanger are linked to allow the second heat exchange medium with a higher temperature to flow into the channel of the battery heat exchanger, thereby increasing the temperature of the fluid in the channel of the battery heat exchanger, thereby heating the power battery and ensuring the discharge efficiency of the power battery, thereby improving the performance of the new energy mining car in cold weather and improving the overall operating efficiency and reliability of the new energy mining car.

[0017] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic diagram of a heat exchange system for a new energy mining car according to some embodiments of the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0023] refer to Figure 1The present application provides a new energy mining car, which includes a power battery 1, an engine 2 and a heat exchange system, and the heat exchange system includes a battery heat exchanger 3 and an engine heat exchanger 4. The battery heat exchanger 3 includes a channel for a first heat exchange medium to flow to exchange heat for the power battery 1. The engine heat exchanger 4 includes a channel for a second heat exchange medium to flow to exchange heat for the engine 2. The battery heat exchanger 3 and the engine heat exchanger 4 can be connected on and off. When the temperature of the power battery 1 is lower than a first set value, the battery heat exchanger 3 and the engine heat exchanger 4 are connected, and the second heat exchange medium enters the battery heat exchanger 3 to heat the power battery 1. When the temperature of the power battery 1 is not lower than the first set value, the engine heat exchanger 4 and the battery heat exchanger 3 are disconnected.

[0024] Specifically, a portion of the channel (referred to as the first channel for ease of description) of the battery heat exchanger 3 for the flow of the first heat exchange medium is arranged inside the power battery 1, and another portion is located outside the power battery 1. The first heat exchange medium flows in the first channel, thereby heat exchange occurs on the power battery 1. For example, when cooling the power battery 1, the first heat exchange medium flows into the power battery 1 through the first channel to absorb the heat of the power battery 1 and increase its own temperature, and reduce the temperature of the power battery 1. Subsequently, the first heat exchange medium flows out of the power battery 1. Under the action of an external thermal management device, such as a fan, the airflow blows over the surface of the first channel, so that the temperature of the first heat exchange medium is low. In this cycle, the cooling of the power battery 1 is completed. The structure of the channel (referred to as the second channel for ease of description) of the engine heat exchanger 4 is similar to the principle of the first channel, and will not be repeated.

[0025] The first channel of the battery heat exchanger 3 and the second channel of the engine heat exchanger 4 can be connected in an on-off manner. When the power battery 1 is heated, the first channel of the battery heat exchanger 3 and the second channel of the engine heat exchanger 4 are connected, and the second heat exchange medium enters the first channel from the second channel and then flows into the power battery 1 to complete the heating of the power battery 1.

[0026] Therefore, when the operating temperature of the new energy mining car is low (for example, in winter) and the temperature of the power battery 1 is low, the battery heat exchanger 3 and the engine heat exchanger 4 are arranged in association so that the second heat exchange medium with a higher temperature enters the channel of the battery heat exchanger 3 and flows, thereby increasing the temperature of the fluid in the channel of the battery heat exchanger 3, thereby heating the power battery 1 and ensuring the discharge efficiency of the power battery 1, thereby improving the performance of the new energy mining car in cold weather and improving the overall operating efficiency and reliability of the new energy mining car.

[0027] It is worth noting that the first heat exchange medium and the second heat exchange medium are the same medium, and the only difference is the temperature. The temperature of the second heat exchange medium is usually higher than that of the first heat exchange medium.

[0028] In some embodiments, the power battery 1 has a normal operating temperature range, and the first set value is lower than a lower limit of the normal operating temperature range.

[0029] Specifically, when the power battery 1 needs to be heated, the temperature of the second heat exchange medium at the outlet of the engine 2 can be determined. If the temperature is not higher than the upper limit of the normal temperature range, the first channel and the second channel are kept disconnected, and the second heat exchange medium circulates in the engine radiator 4 for a certain period of time until the temperature is higher than the upper limit of the normal temperature range, and then the first channel and the second channel are connected, so as to ensure the efficiency of heating the power battery 1.

[0030] For example, the temperature of the second heat exchange medium at the outlet of the engine 2 is usually greater than 40°C, and the temperature range of high-efficiency operation of the power battery 1 is 15~40°C. The first set value is set to be lower than the lower limit of the normal operating temperature range, for example, set to 0°C. When the temperature of the power battery 1 is lower than 0°C and the temperature of the second heat exchange medium at the outlet of the engine 2 is greater than 40°C, the battery heat exchanger 3 and the engine heat exchanger 4 are connected. Due to the large temperature difference between the second heat exchange medium and the first heat exchange medium, the temperature of the first heat exchange medium can be rapidly increased, thereby heating the power battery 1, ensuring the discharge efficiency of the power battery 1, and improving the overall operating efficiency and reliability of the new energy mining car.

[0031] Furthermore, in some embodiments, when the temperature of the power battery 1 is lower than a first set value and the power battery 1 is heated, when the temperature of the power battery 1 rises to a set threshold value (the set threshold value is between a lower limit and an upper limit of a normal temperature range), the engine heat exchanger 4 and the battery heat exchanger 3 are disconnected.

[0032] In some embodiments, the heat exchange system includes a first connecting pipe T1 and a second connecting pipe T2. One end of the first connecting pipe T1 is connected to the inlet of the engine heat exchanger 4, and the other end of the first connecting pipe T1 is connected to the outlet of the battery heat exchanger 3. One end of the second connecting pipe T2 is connected to the inlet of the battery heat exchanger 3, and the other end of the second connecting pipe T2 is connected to the outlet of the engine heat exchanger 4.

[0033] Specifically, the inlet of the engine heat exchanger 4 is fluidly connected to the coolant outlet of the engine 2, and the outlet of the engine heat exchanger 4 is fluidly connected to the coolant inlet of the engine 2. When the second heat exchange medium is passed to the battery heat exchanger 3, a portion of the second heat exchange medium flowing out of the coolant outlet of the engine 2 enters the channel of the battery heat exchanger 3 through the first connecting pipe T1 and merges with the first heat exchange medium. Furthermore, a portion of the heat exchange medium (i.e., the first heat exchange medium and the second heat exchange medium) in the channel of the battery heat exchanger 3 flows back to the inlet of the battery heat exchanger 3 in the channel of the battery heat exchanger 3, and another portion of the heat exchange medium flows back to the coolant inlet of the engine 2 through the second connecting pipe T2, thereby increasing the temperature of the heat exchange medium in the channel of the battery heat exchanger 3 and increasing the flow rate of the heat exchange medium, thereby advantageously achieving heating of the power battery 1.

[0034] In some embodiments, the heat exchange system further includes a first on-off valve V1 and a second on-off valve V2. The first on-off valve V1 and the second on-off valve V2 are respectively arranged on the first connecting pipeline T1 and the second connecting pipeline T2. The first on-off valve V1 and the second on-off valve V2 are respectively used to control the on-off state of the first connecting pipeline T1 and the second connecting pipeline T2.

[0035] Specifically, the first on-off valve V1 and the second on-off valve V2 are both solenoid valves. Under normal circumstances, the first on-off valve V1 and the second on-off valve V2 are both in a power-off disconnected state, so that the battery heat exchanger 3 and the engine heat exchanger 4 are independent of each other. When the temperature of the power battery 1 is lower than the first set value, the battery heat exchanger 3 and the engine heat exchanger 4 can be connected by making the first on-off valve V1 and the second on-off valve V2 electrically connected, which is convenient for control, enhances controllability, and has low control cost.

[0036] In order to further increase the reliability of heating the power battery 1 in a low temperature environment, in some embodiments, the heat exchange system further includes a fifth on-off valve V5, which is arranged on the channel of the battery heat exchanger 3 and is located between the inlet of the battery heat exchanger 3 and the connection between the second connecting pipeline T2 and the channel of the battery heat exchanger 3. When the temperature of the power battery 1 is normal, the fifth on-off valve V5 is connected. When heating the power battery 1, the fifth on-off valve V5 is controlled to be disconnected, so that the second heat exchange medium with a higher temperature can only flow back to the inlet of the engine heat exchanger 4 through the second connecting pipeline T2 after entering the channel of the battery heat exchanger 3 through the first connecting pipeline, instead of flowing back to the inlet of the battery heat exchanger 3, which can reduce the heat exchange load of the battery heat exchanger 3. It also avoids the adverse effect of the second heat exchange medium with a higher temperature on the heat exchange performance of the battery heat exchanger.

[0037] In some embodiments, the new energy mine car also includes a wheel drive system 5 and an operating motor system 11. The wheel drive system 5 is connected to the wheel hub drive of the new energy mine car. The wheel drive system 5 is used to provide driving force for the wheel hub to drive the new energy mine car to move. The operating motor system 11 is used to provide power for the operating mechanism in the new energy mine car. The operating mechanism includes a hydraulic system. The heat exchange system also includes a wheel motor heat exchanger 7 and an operating motor heat exchanger 8. The wheel motor heat exchanger 7 includes a channel for the flow of a third heat exchange medium to exchange heat for the wheel drive system 5. The operating motor heat exchanger 8 includes a channel for the flow of a fourth heat exchange medium to exchange heat for the operating motor system 11. The wheel motor heat exchanger 7 and the operating motor heat exchanger 8 can be connected on and off, so that the fourth heat exchange medium can enter the wheel motor heat exchanger 7 to increase the heat exchange capacity of the wheel motor heat exchanger 7. Or the third heat exchange medium enters the operating motor heat exchanger 8 to increase the heat exchange capacity of the operating motor heat exchanger 8.

[0038] By associating the wheel-side motor heat exchanger 7 and the operating motor heat exchanger 8, the coordination between the various parts of the heat exchange system can be improved, thereby increasing the upper limit of the heat exchange capacity of the heat exchange system of the new energy mine car and improving the overall operating efficiency and reliability of the new energy mine car.

[0039] It is worth noting that the third heat exchange medium and the fourth heat exchange medium are the same medium.

[0040] In some embodiments, the wheel-side drive system 5 includes multiple wheel-side motors (for example, including a first wheel-side motor 51, a second wheel-side motor 52 and a third wheel-side motor 53) respectively connected to multiple wheel hub drives of the new energy mining vehicle, and the multiple wheel-side motors share a wheel-side motor heat exchanger 7.

[0041] In some embodiments, the new energy mining vehicle has a pure electric state. In the pure electric state, the power in the engineering machinery is all provided by the power battery 1. When the new energy mining vehicle is in a pure electric state, when the temperature of the wheel-side drive system 5 exceeds the second set value, the pipeline between the wheel-side motor heat exchanger 7 and the working motor heat exchanger 8 is connected to allow the fourth heat exchange medium to enter the wheel-side motor heat exchanger 7 to improve the heat exchange capacity of the wheel-side motor heat exchanger 7.

[0042] Specifically, when driving in a pure electric state, the wheel-side drive system 5 of the new energy mine car has a high heat exchange demand. At this time, the operating mechanism is usually in an inoperative state, so the heat exchange demand of the operating motor system 11 is relatively low. Therefore, a portion of the fourth heat exchange medium is passed into the wheel-side motor heat exchanger 7 to increase the flow of the heat exchange medium (i.e., the third heat exchange medium and the fourth heat exchange medium) in the channel of the wheel-side motor heat exchanger 7. Correspondingly, the heat exchange capacity in the operating motor heat exchanger 8 will decrease. In other words, a portion of the heat exchange capacity of the operating motor heat exchanger 8 is auxiliary supplied to the wheel-side motor heat exchanger 7. This can not only improve the heat exchange capacity of the wheel-side motor heat exchanger 7 and meet the heat exchange demand of the wheel-side drive system 5, but also will not affect the heat exchange of the operating motor system 11, thereby increasing the upper limit of the heat exchange capacity of the new energy mine car and enhancing the ability of the new energy mine car to transfer operations in a hot environment, thereby improving the overall operating efficiency and reliability of the new energy mine car.

[0043] In some embodiments, the new energy mining car also includes a generator system 6, and the generator system 6 and the working motor system 11 share an operating motor heat exchanger 8. In a non-pure electric driving state, the engine 2 supplies energy to the generator system 6, and the electric energy generated by the generator supplies energy to the wheel-side drive system 5, thereby moving the entire vehicle. At this time, the generator system 6 has a large heat exchange demand, and the working motor heat exchanger 8 does not assist the wheel-side drive system 5 in heat exchange.

[0044] In some embodiments, when the new energy mining car is in a stationary operating state, when the temperature of the operating motor system 11 exceeds a third set value, the wheel-side motor heat exchanger 7 and the operating motor heat exchanger 8 are connected to allow the third heat exchange medium to enter the operating motor heat exchanger 8 to improve the heat exchange capacity of the operating motor heat exchanger 8.

[0045] Specifically, at this time, since the wheel-side drive system 5 does not drive the new energy mine car to move, the wheel-side motor system 5 generates less heat and has a lower heat exchange demand, while the operating mechanism generates more heat and the operating motor system 11 has a higher heat exchange demand. In this way, a portion of the third heat exchange medium enters the operating motor heat exchanger 8 to enhance the heat exchange capacity of the operating motor heat exchanger 8. Accordingly, the heat exchange capacity of the wheel-side motor heat exchanger 7 is reduced. In other words, the heat exchange capacity of the wheel-side motor heat exchanger 7 is auxiliary supplied to the operating motor heat exchanger 8. This can not only improve the heat exchange capacity of the operating motor heat exchanger 8, but also will not affect the heat exchange of the wheel-side drive system 5, thereby increasing the upper limit of the heat exchange capacity of the new energy mine car, enhancing the ability of the new energy mine car to operate in a hot environment, and thereby improving the overall operating efficiency and reliability of the new energy mine car.

[0046] In some embodiments, the heat exchange system also includes a working motor system heat exchange pump 9. The working motor system heat exchange pump 9 is fluidically connected to the working motor heat exchanger 8. The working motor system heat exchange pump 9 is used to pump the fourth heat exchange medium, and the working motor system heat exchange pump 9 is configured to control the flow rate of the fourth heat exchange medium. When the new energy mining car is driving in a pure electric state, when the temperature of the wheel-side drive system 5 exceeds the second set value, the working motor system heat exchange pump 9 increases the flow rate of the fourth heat exchange medium.

[0047] Specifically, when the fourth heat exchange medium is supplied to the wheel-side motor heat exchanger 7, the flow rate of the fourth heat exchange medium is increased by the operating motor system heat pump 9, so that the fluid pressure in the channel of the wheel-side motor heat exchanger 7 increases, thereby facilitating a portion of the fourth heat exchange medium to flow into the channel of the wheel-side motor heat exchanger 7.

[0048] In some embodiments, the heat exchange system also includes a wheel-side drive system heat exchange pump 10. The wheel-side drive system heat exchange pump 10 is fluidically connected to the wheel-side motor heat exchanger 7. The wheel-side drive system heat exchange pump 10 is used to pump a third fluid, and the wheel-side drive system heat exchange pump 10 is configured to control the flow rate of the third heat exchange medium. Under the condition that the new energy mining car is in a stationary operating state, when the temperature of the operating motor system exceeds the third set value, the wheel-side drive system heat exchange pump 10 increases the flow rate of the third heat exchange medium.

[0049] Specifically, when the third heat exchange medium is supplied to the working motor heat exchanger 8, the flow rate of the third heat exchange medium is increased by the wheel-side drive system heat pump 10, so that the fluid pressure in the channel of the working motor heat exchanger 8 increases, making it easier for a portion of the third heat exchange medium to flow into the channel of the working motor heat exchanger 8.

[0050] In some embodiments, the heat exchange system includes a third connecting pipeline T3 and a fourth connecting pipeline T4. One end of the third connecting pipeline T3 is connected to the outlet of the working motor heat exchanger 8, and the other end of the third connecting pipeline T3 is connected to the outlet of the wheel-side motor heat exchanger 7. One end of the fourth connecting pipeline T4 is connected to the inlet of the working motor heat exchanger 8, and the other end of the fourth connecting pipeline T3 is connected to the inlet of the wheel-side motor heat exchanger 7.

[0051] Specifically, when the fourth heat exchange medium enters the wheel-side motor heat exchanger 7, after the fourth heat exchange medium flows out from the outlet of the working motor heat exchanger 8, a part of the fourth heat exchange medium enters the channel of the wheel-side motor heat exchanger 7 through the third connecting pipe T3 and merges with the third heat exchange medium, thereby increasing the flow of the heat exchange medium (i.e., the third heat exchange medium and the fourth heat exchange medium) in the channel of the wheel-side motor heat exchanger 7. Further, a part of the heat exchange medium in the channel of the wheel-side motor heat exchanger 7 flows back to the inlet of the wheel-side motor heat exchanger 7 through the channel of the wheel-side motor heat exchanger 7, and another part of the heat exchange medium enters the channel of the working motor heat exchanger 8 through the fourth connecting pipe T4 and flows back to the inlet of the working motor heat exchanger 8, thereby advantageously improving the circulating heat capacity of the wheel-side motor heat exchanger 7.

[0052] When the third heat exchange medium enters the working motor heat exchanger 8, the above process may be referred to and will not be described in detail here.

[0053] In some embodiments, the heat exchange system further includes a third on-off valve V3 and a fourth on-off valve V4. The third on-off valve V3 and the fourth on-off valve V4 are respectively arranged on the third connecting pipeline T3 and the fourth connecting pipeline T4. The third on-off valve V3 and the fourth on-off valve V4 are respectively used to control the on-off state of the third connecting pipeline T3 and the fourth connecting pipeline T4.

[0054] Specifically, the third on-off valve V3 and the fourth on-off valve V4 are both solenoid valves. Under normal circumstances, the third on-off valve V3 and the fourth on-off valve V4 are both in a power-off disconnected state, so that the wheel-side motor heat exchanger 7 and the working motor heat exchanger 8 are independent of each other. When the wheel-side motor heat exchanger 7 and the working motor heat exchanger 8 need to be associated, the third on-off valve V3 and the fourth on-off valve V4 can be electrically connected, which is convenient for control, enhances controllability, and has low control costs.

[0055] In some embodiments, the new energy mining vehicle further includes a DC-DC converter system 12. The generator system 6, the DC-DC converter system 12 and the operating motor system 11 share the operating motor heat exchanger 8, thereby improving the integration of the heat exchange system.

[0056] In some embodiments, the heat exchange system includes a temperature sensor 13, and the temperature sensor 13 is used to detect the temperature of each heat exchanger, so as to better control the entire heat exchange system.

[0057] In some embodiments, the heat exchange system also includes a control system 14. The control system 14 is electrically connected to each on-off valve to control the connection or disconnection of each on-off valve, and the control system 14 is also connected to the operating motor system heat exchange pump 9 and the wheel-side drive system heat exchange pump 10. The control system 14 is used to control the flow rate of the motor system heat exchange pump 9 and the wheel-side drive system heat exchange pump 10.

[0058] Furthermore, in some embodiments, the heat exchange system also includes multiple fans (not shown in the figure), and the multiple fans are respectively arranged corresponding to each heat exchanger. The fans are used to generate airflow to flow through the channel of the heat exchanger, thereby exchanging heat with the heat exchange medium in the channel to achieve temperature control of the heat exchange medium. The fans are electrically connected to the control system 14, and the control system 14 can control the rotation speed of each fan to achieve intelligent heat exchange.

[0059] The following describes a new energy mining car of a specific embodiment of the present application. The new energy mining car mainly includes a power battery 1, a range extender (engine 2 and generator system 6), an operating motor system 11, a DC-DC converter 12, a wheel side drive system 5, a heat exchange system and a control system 14.

[0060] The heat exchange system mainly includes a battery heat exchanger 3, an engine heat exchanger 4, a wheel-side motor heat exchanger 7, and an operating motor heat exchanger 8.

[0061] Furthermore, the battery heat exchanger 3, the engine heat exchanger 4, the wheel-side motor heat exchanger 7, and the working motor heat exchanger 8 are all equipped with temperature sensing devices. The temperature information of each temperature sensing device is received by the control system 14, and the speed of each fan is adjusted according to the agreement of each protocol.

[0062] The battery heat exchanger 3 is connected to the power battery 1 through a cooling pipeline (i.e., a channel for the first heat exchange medium to flow), and a fifth on-off valve V5 is installed on the cooling pipeline. The fifth on-off valve V5 is in a connected state when power is off and in a normally closed state when power is on.

[0063] The engine heat exchanger 4 is connected to the coolant inlet and coolant outlet of the engine 2. The coolant inlet and coolant outlet of the engine 2 are both equipped with temperature sensors for detecting the temperature of the second heat exchange medium and feeding back the temperature information to the control system 14. The control system 14 adjusts the fan speed of the engine heat exchanger 4 according to the received temperature information and the system protocol agreement to realize intelligent control of the heat exchange system.

[0064] The cooling pipeline of the engine heat exchanger 4 (i.e., the channel for the flow of the second heat exchange medium) is connected to the battery heat exchanger 3 through the first connecting pipeline T1 and the second connecting pipeline T2. The first connecting pipeline T1 and the second connecting pipeline T2 are respectively provided with a first on-off valve V1 and a second on-off valve V2. The first on-off valve V1 and the second on-off valve V2 are in a normally closed state when power is off, and the solenoid valve is in a connected state when power is on.

[0065] When the control system detects that the temperature of the power battery 1 is normal, the first on-off valve V1, the second on-off valve V2, and the third on-off valve V3 are all in a power-off state, that is, the first on-off valve V1 is connected, and the second on-off valve V2 and the third on-off valve V3 are disconnected. At this time, the engine heat exchanger 4 and the battery heat exchanger 3 are independent units that do not interfere with each other; when the control system 14 detects that the temperature of the power battery 1 is lower than the agreed temperature of 0°, the first on-off valve V1, the second on-off valve V2, and the third on-off valve V3 are all energized, that is, the first on-off valve V1 is disconnected, and the second on-off valve V2 and the third on-off valve V3 are connected, so that part of the second heat exchange medium heats the power battery 1 through the pipeline of the battery heat exchanger 3, thereby improving the discharge efficiency of the power battery 1. When the power battery 1 reaches the agreed temperature of the agreement, the control system 14 controls the first on-off valve V1, the second on-off valve V2, and the third on-off valve V3 to be de-energized, and the two heat exchangers become independent heat exchange systems again.

[0066] The wheel-side motor heat exchanger 7, the wheel-side drive system heat pump 10, and the wheel-side drive system 5 (wheel-side motor + wheel-side motor controller) are connected in series by a cooling pipeline (i.e., a channel for the flow of the third heat exchange medium), mainly providing a heat exchange function for the wheel-side drive system 5; the operating motor heat exchanger 8, the operating motor system heat pump 9, the generator system 6, the operating motor system 11, and the DC-DC converter system 12 are connected by a cooling pipeline (i.e., a channel for the flow of the fourth heat exchange medium).

[0067] The wheel-side motor heat exchanger 7 is connected to the working motor heat exchanger 8 through the third on-off valve V3 and the fourth on-off valve V4. The third on-off valve V3 and the fourth on-off valve V4 are two-position two-way solenoid valves. When the power is off, the solenoid valve channel is closed, and when the power is on, the solenoid valve is connected. The specific operation is as follows: when the control system 14 detects that the wheel-side drive system 5 and the working motor system 11 are both within the agreed range of the agreement, the third on-off valve V3 and the fourth on-off valve V4 will not be powered. At this time, the pipelines between the two heat exchangers are not connected, and the two heat exchangers are independent heat exchange units that do not interfere with each other; when the whole machine is in pure electric driving state, the generator is not working, and the working motor is also in a low power state. At this time, the working motor system 11 is in a low heat exchange demand state, and the wheel-side drive system 5 is in a high heat exchange demand state. The control system 14 The temperature information of the system 11 is judged in combination with the agreement. If the agreement is met, the third on-off valve V3 and the fourth on-off valve V4 are energized (connected), and the flow rate of the working motor system heat pump 9 is increased to the agreed value, and part of the fourth heat exchange medium is diverted to the wheel-side motor heat exchanger 7 for auxiliary heat exchange, thereby improving the heat exchange capacity of the wheel-side motor heat exchanger 7 until the temperature of the wheel-side drive system 5 drops to the normal range agreed in the agreement. The third on-off valve V3 and the fourth on-off valve V4 are de-energized, and the pipeline connection between the wheel-side motor heat exchanger 7 and the working motor heat exchanger 8 is cut off.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present application, which should be included in the scope of the technical solution for protection in the present application.

Claims

1. A new energy mining vehicle, the engineering machinery comprising a power battery (1), an engine (2) and a heat exchange system, characterized in that: The heat exchange system comprises: A battery heat exchanger (3), the battery heat exchanger (3) comprising a channel for a first heat exchange medium to flow so as to exchange heat for the power battery (1); and An engine heat exchanger (4), the engine heat exchanger (4) comprising a channel for a second heat exchange medium to flow for heat exchange for the engine (2), The battery heat exchanger (3) and the engine heat exchanger (4) are connected in an on-off manner; when the temperature of the power battery (1) is lower than a first set value, the battery heat exchanger (3) and the engine heat exchanger (4) are connected, and the second heat exchange medium enters the battery heat exchanger (3) to heat the power battery (1); when the temperature of the power battery (1) is not lower than the first set value, the engine heat exchanger (4) and the battery heat exchanger (3) are disconnected.

2. The new energy mining vehicle according to claim 1, characterized in that: The power battery (1) has a normal operating temperature range, and the first set value is lower than the lower limit of the normal operating temperature range.

3. The new energy mining vehicle according to claim 1, characterized in that: The heat exchange system comprises a first connecting pipeline (T1) and a second connecting pipeline (T2), one end of the first connecting pipeline (T1) is connected to the inlet of the engine heat exchanger (4), the other end of the first connecting pipeline (T1) is connected to the outlet of the battery heat exchanger (3), one end of the second connecting pipeline (T2) is connected to the inlet of the battery heat exchanger (3), and the other end of the second connecting pipeline (T2) is connected to the outlet of the engine heat exchanger (4).

4. The new energy mining vehicle according to claim 3, characterized in that: The heat exchange system further comprises a first on-off valve (V1) and a second on-off valve (V2), wherein the first on-off valve (V1) and the second on-off valve (V2) are respectively arranged on the first connecting pipeline (T1) and the second connecting pipeline (T1), and the first on-off valve (V1) and the second on-off valve (V2) are respectively used to control the on-off state of the first connecting pipeline (T1) and the second connecting pipeline (T2).

5. The new energy mining vehicle according to any one of claims 1 to 4, characterized in that: The engineering machine further comprises a wheel drive system (5) and an operating motor system (11), wherein the wheel drive system (5) is drivingly connected to a wheel hub of the engineering machine, the wheel drive system (5) is used to provide a driving force for the wheel hub to drive the engineering machine to move, and the operating motor system (11) is used to provide power for an operating mechanism in the engineering machine, wherein the operating mechanism comprises a hydraulic system. The heat exchange system further comprises: A wheel-side motor heat exchanger (7), the wheel-side motor heat exchanger (7) comprising a channel for a third heat exchange medium to flow so as to exchange heat for the wheel-side drive system (5); and A working motor heat exchanger (8), the working motor heat exchanger (8) comprising a channel for a fourth heat exchange medium to flow so as to exchange heat for the working motor system (11), The wheel-side motor heat exchanger (7) and the working motor heat exchanger (8) are connected in an on-off manner, so that the fourth heat exchange medium can enter the wheel-side motor heat exchanger (7) to increase the heat exchange capacity of the wheel-side motor heat exchanger (7), or the third heat exchange medium can enter the working motor heat exchanger (8) to increase the heat exchange capacity of the working motor heat exchanger (8).

6. The new energy mining vehicle according to claim 5, characterized in that: The engineering machine has a pure electric state, in which all the power in the engineering machine is provided by the power battery (1). When the engineering machine is in a pure electric state and the temperature of the wheel-side drive system (5) exceeds a second set value, the pipeline between the wheel-side motor heat exchanger (7) and the working motor heat exchanger (8) is connected so that the fourth heat exchange medium enters the wheel-side motor heat exchanger (7) to improve the heat exchange capacity of the wheel-side motor heat exchanger (7).

7. The new energy mining vehicle according to claim 6, characterized in that: The heat exchange system also includes a working motor system heat exchange pump (9), which is fluidically connected to the working motor heat exchanger (8). The working motor system heat exchange pump (9) is used to pump the fourth heat exchange medium, and the working motor system heat exchange pump (9) is configured to control the flow rate of the fourth heat exchange medium. When the engineering machinery is in a pure electric state, when the temperature of the wheel-side drive system (5) exceeds a second set value, the working motor system heat exchange pump (9) increases the flow rate of the fourth heat exchange medium.

8. The new energy mining vehicle according to claim 7, characterized in that: Under the condition that the engineering machinery is in a stationary working state, when the temperature of the working motor system (11) exceeds a third set value, the wheel-side motor heat exchanger (7) and the working motor heat exchanger (8) are connected to allow the third heat exchange medium to enter the working motor heat exchanger (8) to improve the heat exchange capacity of the working motor heat exchanger (8).

9. The new energy mining vehicle according to claim 8, characterized in that: The heat exchange system further comprises a wheel-side drive system heat exchange pump (10), wherein the wheel-side drive system heat exchange pump (10) is fluidically connected to the wheel-side motor heat exchanger (7), and the wheel-side drive system heat exchange pump (10) is used to pump the third fluid, and the wheel-side drive system heat exchange pump (10) is configured to control the flow rate of the third heat exchange medium. When the temperature of the operating motor system exceeds a third set value when the engineering machinery is in a stationary operating state, the wheel-side drive system heat exchange pump (10) increases the flow rate of the third heat exchange medium.

10. The new energy mining vehicle according to claim 5, characterized in that: The heat exchange system comprises a third connecting pipeline (T3) and a fourth connecting pipeline (T4), one end of the third connecting pipeline (T3) is connected to the outlet of the working motor heat exchanger (8), and the other end of the third connecting pipeline (T3) is connected to the outlet of the wheel-side motor heat exchanger (7), one end of the fourth connecting pipeline (T4) is connected to the inlet of the working motor heat exchanger (8), and the other end of the fourth connecting pipeline (T3) is connected to the inlet of the wheel-side motor heat exchanger (7).

11. The new energy mining vehicle according to claim 10, characterized in that: The heat exchange system further comprises a third on-off valve (V3) and a fourth on-off valve (V4), wherein the third on-off valve (V3) and the fourth on-off valve (V4) are respectively arranged on the third connecting pipeline (T3) and the fourth connecting pipeline (T4), and the third on-off valve (V3) and the fourth on-off valve (V4) are respectively used to control the on-off state of the third connecting pipeline (T3) and the fourth connecting pipeline (T4).

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