A thermal management device and an evacuation diagnosis method

Abstract

An embodiment of the present application provides a thermal management device and an evacuation diagnosis method, which relate to the technical field of electric vehicles. The thermal management device is applied to an electric vehicle and includes an electric drive system circuit, a battery system circuit, a warm air circuit, a filling and exhaust circuit, and a multi-way valve component; the electric drive system circuit includes an electric drive system and an electric drive water pump connected in sequence, and the electric drive system and the electric drive water pump are respectively connected to the multi-way valve component; the battery system circuit includes a battery water pump and a power battery connected in sequence, and the battery water pump and the power battery are respectively connected to the multi-way valve component; the warm air circuit includes a warm air water pump, a PTC mechanism, and a heat exchanger connected in sequence, and the warm air water pump and the heat exchanger are respectively connected to the multi-way valve component; the filling and exhaust circuit is connected to the multi-way valve component. The thermal management device can achieve the technical effect of improving the thermal management performance of electric vehicles.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular, to a thermal management device and an evacuation diagnosis method. Background Art

[0002] In recent years, the development of electric vehicles in China has been rapid. Under the pressure of the energy "dual carbon" goal, the energy consumption target of electric vehicles has become more stringent, and it has become necessary to study more efficient integrated vehicle thermal management technology.

[0003] In the prior art, the integrated thermal management system has complex pipeline design, and the coolant filling and evacuation become cumbersome, which is troublesome in vehicle applications. Usually, when the coolant is first filled in the vehicle, the coolant filling is completed through a specific filling mileage. However, after the filling is completed, there will inevitably be some residual air bubbles in the cooling pipeline, which is likely to trigger the dry running of the water pump, thereby affecting the overall vehicle thermal management performance. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a thermal management device and an evacuation diagnosis method, which can achieve the technical effect of improving the thermal management performance of electric vehicles.

[0005] In a first aspect, an embodiment of the present application provides a thermal management device applied to an electric vehicle, including an electric drive system circuit, a battery system circuit, a warm air circuit, a filling and exhaust circuit, and a multi-way valve component;

[0006] The electric drive system circuit includes an electric drive system and an electric drive water pump connected in sequence, and the electric drive system and the electric drive water pump are respectively connected to the multi-way valve component;

[0007] The battery system circuit includes a battery water pump and a power battery connected in sequence, and the battery water pump and the power battery are respectively connected to the multi-way valve component;

[0008] The warm air circuit includes a warm air water pump, a PTC mechanism, and a heat exchanger connected in sequence, and the warm air water pump and the heat exchanger are respectively connected to the multi-way valve component;

[0009] The filling and exhaust circuit is connected to the multi-way valve component.

[0010] In the above implementation process, the thermal management device adopts an intelligent integrated multi-way valve component to achieve an integrated design, integrates and couples the electric drive system, battery system, warm air (air conditioning) system, and filling and exhaust circuit of the electric vehicle, and flexibly controls according to the vehicle operating conditions to achieve controllable adjustment of multiple modes, making the best use of the vehicle energy efficiency, reducing the energy consumption of the electric vehicle, and improving the cruising range of the vehicle; thus, the thermal management device can achieve the technical effect of improving the thermal management performance of electric vehicles.

[0011] Further, the warm air circuit further includes an electronically controlled three-way valve. The PTC mechanism and the heat exchanger are connected through the first interface and the second interface of the electronically controlled three-way valve, and the third interface of the electronically controlled three-way valve is connected to the multi-way valve member.

[0012] Further, the filling and exhaust circuit includes an expansion tank mechanism. One end of the expansion tank mechanism is connected to the multi-way valve and the electric drive water pump, and the other end of the expansion tank mechanism is connected to the heat exchanger.

[0013] Further, the device adjusts the circulation mode by controlling the connection position of the multi-way valve member. The connection positions of the multi-way valve member include:

[0014] A first preset connection position, where the electric drive system circuit is in an independent internal circulation mode, and the battery system circuit and the warm air circuit are connected in series in a large circulation mode;

[0015] A second preset connection position, where the electric drive system circuit, the battery system circuit, and the warm air circuit are in an independent internal circulation mode;

[0016] A third preset connection position, where the battery system circuit is in an independent internal circulation mode, and the electric drive system circuit and the warm air circuit are connected in series in a large circulation mode;

[0017] A fourth preset connection position, where the electric drive system circuit, the battery system circuit, and the warm air circuit are connected in series in a large circulation mode.

[0018] In a second aspect, an embodiment of the present application provides an evacuation diagnosis method, which is applied to the thermal management device in the first aspect. The method includes:

[0019] Determine whether the battery water pump has a dry running fault;

[0020] If the battery water pump has a dry running fault, diagnose and process the thermal management device according to a first diagnosis strategy;

[0021] If the battery water pump does not have a dry running fault, diagnose and process the thermal management device according to a second diagnosis strategy.

[0022] Further, the step of diagnosing and processing the thermal management device according to the first diagnosis strategy or the step of diagnosing and processing the thermal management device according to the second diagnosis strategy includes:

[0023] Obtain the connection position state of the multi-way valve member, denoted as the first state;

[0024] Control the connection position of the multi-way valve member to switch to a second state according to the first state;

[0025] In the second state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-run diagnosis of the water pump, and continuously operate for a first preset time;

[0026] Perform the dry-run fault diagnosis of the water pump for the first time, and determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state, and the diagnosis process ends;

[0027] If the fault is not recovered, control the connection position of the multi-way valve component to switch to the third state according to the second state;

[0028] In the third state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-run diagnosis of the water pump, and continuously operate for a second preset time;

[0029] Perform the dry-run fault diagnosis of the water pump for the second time, and determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state, and the diagnosis process ends;

[0030] If the fault is not recovered, the multi-way valve component returns to the default state and generates a fault message.

[0031] Further, in the step of diagnosing and processing the thermal management device according to the first diagnostic strategy:

[0032] If the first state is the first preset connection position, the second state is the fourth preset connection position, and the third state is the first preset connection position;

[0033] If the first state is the second preset connection position, the second state is the first preset connection position, and the third state is the fourth preset connection position;

[0034] If the first state is the third preset connection position, the second state is the fourth preset connection position, and the third state is the first preset connection position;

[0035] If the first state is the fourth preset connection position, the second state is the first preset connection position, and the third state is the third preset connection position.

[0036] Further, if the first state is one of the second preset connection position, the third preset connection position, and the fourth preset connection position, after the step of performing the dry-run fault diagnosis of the water pump for the second time, the method further includes:

[0037] Control the connection position of the multi-way valve component to switch to the fourth state according to the third state;

[0038] In the fourth state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-run diagnosis of the water pump, and continuously operate for a third preset time;

[0039] Perform the dry-run fault diagnosis of the water pump for the third time, and determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state, and the diagnosis process ends.

[0040] Further, in the step of diagnosing and processing the thermal management device according to the second diagnosis strategy:

[0041] If the first state is the first preset connection position, the second state is the third preset connection position, and the third state is the fourth preset connection position;

[0042] If the first state is the second preset connection position, the second state is the third preset connection position, and the third state is the fourth preset connection position;

[0043] If the first state is the third preset connection position, the second state is the fourth preset connection position, and the third state is the third preset connection position;

[0044] If the first state is the fourth preset connection position, the second state is the first preset connection position, and the third state is the third preset connection position.

[0045] Further, if the first state is one of the first preset connection position, the second preset connection position, and the fourth preset connection position, after the step of performing the dry-run fault diagnosis of the water pump for the second time, the method further includes:

[0046] Control the connection position of the multi-way valve component to switch to the fourth state according to the third state;

[0047] In the fourth state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-run diagnosis of the water pump, and continuously operate for a third preset time;

[0048] Perform the dry-run fault diagnosis of the water pump for the third time, and determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state, and the diagnosis process ends.

[0049] Other features and advantages of the present application will be described in the subsequent description, or, some features and advantages can be inferred from the description or determined without doubt, or can be obtained by implementing the above technologies disclosed in the present application.

[0050] To make the above objects, features, and advantages of the present application more obvious and understandable, the following provides preferred embodiments in conjunction with the accompanying drawings and describes them in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0052] Figure 1 Structural schematic diagram of the thermal management device provided by the embodiment of the present application;

[0053] Figure 2 Structural schematic diagram of the first preset connection position provided by the embodiment of the present application;

[0054] Figure 3 Structural schematic diagram of the second preset connection position provided by the embodiment of the present application;

[0055] Figure 4 Structural schematic diagram of the third preset connection position provided by the embodiment of the present application;

[0056] Figure 5 Structural schematic diagram of the fourth preset connection position provided by the embodiment of the present application;

[0057] Figure 6 Flow schematic diagram of the evacuation diagnosis method provided by the embodiment of the present application;

[0058] Figure 7 Flow schematic diagram of the diagnosis process provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0060] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0061] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0062] In addition, the terms "mounted", "arranged", "provided with", "connected", "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0064] The embodiment of this application provides a thermal management device and an evacuation diagnosis method, which can be applied to the thermal management process of electric vehicles; the thermal management device adopts an intelligent integrated multi-way valve component to achieve an integrated design, integrates and couples the electric drive system, battery system, warm air (air conditioning) system and filling and exhaust circuit of the electric vehicle, and flexibly controls according to the vehicle conditions, realizes controllable adjustment of multiple modes, maximizes the use of the vehicle energy efficiency, reduces the energy consumption of the electric vehicle, and improves the cruising range of the vehicle; thus, the thermal management device can achieve the technical effect of improving the thermal management performance of the electric vehicle.

[0065] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the thermal management device provided by the embodiment of this application. The thermal management device is applied to an electric vehicle and includes an electric drive system circuit 100, a battery system circuit 200, a warm air circuit 300, a filling and exhaust circuit 400 and a multi-way valve component 500.

[0066] Exemplarily, the electric drive system circuit 100 includes an electric drive system 110 and an electric drive water pump 120 connected in sequence, and the electric drive system 110 and the electric drive water pump 120 are respectively connected to the multi-way valve member 500.

[0067] Exemplarily, the battery system circuit 200 includes a battery water pump 210 and a power battery 220 connected in sequence, and the battery water pump 210 and the power battery 220 are respectively connected to the multi-way valve member 500.

[0068] Exemplarily, the warm air circuit 300 includes a warm air water pump 310, a PTC mechanism 320, and a heat exchanger 330 connected in sequence. The warm air water pump 310 and the heat exchanger 330 are respectively connected to the multi-way valve member 500; where Positive Temperature Coefficient (PTC) generally refers to semiconductor materials or components with a very large positive temperature coefficient.

[0069] Exemplarily, the filling and exhaust circuit 400 is connected to the multi-way valve member 500.

[0070] Exemplarily, the thermal management device adopts an intelligent integrated multi-way valve member 500 to achieve an integrated design, integrates and couples the electric drive system circuit 100, the battery system circuit 200, the warm air circuit 300, and the filling and exhaust circuit 400 of the electric vehicle, and flexibly controls according to the vehicle operating conditions to achieve controllable adjustment of multiple modes, maximally utilize the vehicle energy efficiency, reduce the energy consumption of the electric vehicle, and improve the cruising range of the vehicle; thus, the thermal management device can achieve the technical effect of improving the thermal management performance of the electric vehicle.

[0071] Exemplarily, the warm air circuit 300 further includes an electronically controlled three-way valve 340. The PTC mechanism 320 and the heat exchanger 330 are connected through the first interface and the second interface of the electronically controlled three-way valve 340, and the third interface of the electronically controlled three-way valve 340 is connected to the multi-way valve member 500.

[0072] Exemplarily, the filling and exhaust circuit 400 includes an expansion tank mechanism. One end of the expansion tank mechanism is connected to the electric drive water pump of the multi-way valve, and the other end of the expansion tank mechanism is connected to the heat exchanger.

[0073] Please refer to Figures 2 to 5 , Figure 2 , which is a schematic structural diagram of the first preset connection position provided by the embodiment of the present application, Figure 3 , which is a schematic structural diagram of the second preset connection position provided by the embodiment of the present application, Figure 4 , which is a schematic structural diagram of the third preset connection position provided by the embodiment of the present application, Figure 5 , which is a schematic structural diagram of the fourth preset connection position provided by the embodiment of the present application.

[0074] Exemplarily, the device adjusts the circulation mode by controlling the connection position of the multi-way valve member, and the connection positions of the multi-way valve member include:

[0075] The first preset connection position, where the electric drive system circuit is in an independent internal circulation mode, and the battery system circuit and the warm air circuit are connected in series in a large circulation mode;

[0076] The second preset connection position, where the electric drive system circuit, the battery system circuit, and the warm air circuit are in an independent internal circulation mode;

[0077] The third preset connection position, where the battery system circuit is in an independent internal circulation mode, and the electric drive system circuit and the warm air circuit are connected in series in a large circulation mode;

[0078] The fourth preset connection position, where the electric drive system circuit, the battery system circuit, and the warm air circuit are connected in series in a large circulation mode.

[0079] Please refer to Figure 6 , Figure 6 , which is a schematic flow chart of the evacuation diagnosis method provided by the embodiment of the present application. This evacuation diagnosis method is applied to the Figures 1 to 5 thermal management device shown. The evacuation diagnosis method includes the following steps:

[0080] S100: Determine whether the battery water pump has a dry running fault;

[0081] If the battery water pump has a dry running fault, S200: Perform diagnostic processing on the thermal management device according to the first diagnostic strategy;

[0082] If the battery water pump does not have a dry running fault, S300: Perform diagnostic processing on the thermal management device according to the second diagnostic strategy.

[0083] Exemplarily, different evacuation diagnostic strategies are executed according to whether the battery water pump has a dry running fault, thereby improving the diagnostic accuracy.

[0084] Please refer to Figure 7 , Figure 7 , which is a schematic flow chart of the diagnostic processing provided by the embodiment of the present application.

[0085] Exemplarily, the step of S200: performing diagnostic processing on the thermal management device according to the first diagnostic strategy or the step of S300: performing diagnostic processing on the thermal management device according to the second diagnostic strategy includes:

[0086] S401: Obtain the connection position state of the multi-way valve member, denoted as the first state;

[0087] S402: Control the connection position of the multi-way valve member to switch to the second state according to the first state;

[0088] S403: Control the electric drive water pump, battery water pump, and heater water pump to operate according to preset parameters in the second state, shield the dry-run diagnosis of the water pump, and continuously operate for the first preset time;

[0089] S404: Perform the dry-run fault diagnosis of the water pump for the first time and determine whether the fault is restored;

[0090] If the fault is restored, jump to step S09: The multi-way valve component returns to the default state, and the diagnosis process ends;

[0091] If the fault is not restored, S405: Control the connection position of the multi-way valve component to switch to the third state according to the second state;

[0092] S406: Control the electric drive water pump, battery water pump, and heater water pump to operate according to preset parameters in the third state, shield the dry-run diagnosis of the water pump, and continuously operate for the second preset time;

[0093] S407: Perform the dry-run fault diagnosis of the water pump for the second time and determine whether the fault is restored;

[0094] If the fault is restored, jump to step S09: The multi-way valve component returns to the default state, and the diagnosis process ends;

[0095] S408: If the fault is not restored, the multi-way valve component returns to the default state and generates a fault message.

[0096] Exemplarily, in step S200: The step of diagnosing and processing the thermal management device according to the first diagnosis strategy:

[0097] If the first state is the first preset connection position, the second state is the fourth preset connection position, and the third state is the first preset connection position;

[0098] If the first state is the second preset connection position, the second state is the first preset connection position, and the third state is the fourth preset connection position;

[0099] If the first state is the third preset connection position, the second state is the fourth preset connection position, and the third state is the first preset connection position;

[0100] If the first state is the fourth preset connection position, the second state is the first preset connection position, and the third state is the third preset connection position.

[0101] Exemplarily, if the first state is one of the second preset connection position, the third preset connection position, and the fourth preset connection position, after the step of performing the dry-run fault diagnosis of the water pump for the second time in S407, the method further includes:

[0102] Control the connection position of the multi-way valve component to switch to the fourth state according to the third state;

[0103] In the fourth state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-run diagnosis of the water pump, and continuously operate for a third preset time; optionally, in the first diagnosis strategy, the fourth state is the same as the first state;

[0104] Perform the dry-run fault diagnosis of the water pump for the third time to determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state, and the diagnosis process ends.

[0105] Exemplarily, in S300: In the step of diagnosing and processing the thermal management device according to the second diagnosis strategy:

[0106] If the first state is the first preset connection position, the second state is the third preset connection position, and the third state is the fourth preset connection position;

[0107] If the first state is the second preset connection position, the second state is the third preset connection position, and the third state is the fourth preset connection position;

[0108] If the first state is the third preset connection position, the second state is the fourth preset connection position, and the third state is the third preset connection position;

[0109] If the first state is the fourth preset connection position, the second state is the first preset connection position, and the third state is the third preset connection position.

[0110] Exemplarily, if the first state is one of the first preset connection position, the second preset connection position, and the fourth preset connection position, after S407: The step of performing the dry-run fault diagnosis of the water pump for the second time, the method further includes:

[0111] Control the connection position of the multi-way valve component to switch to the fourth state according to the third state;

[0112] In the fourth state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-run diagnosis of the water pump, and continuously operate for a third preset time; optionally, in the second diagnosis strategy, the fourth state is the same as the first state;

[0113] Perform the dry-run fault diagnosis of the water pump for the third time to determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state, and the diagnosis process ends.

[0114] In some implementation scenarios, in combination with Figures 1 to 7 , based on the thermal management device provided in the embodiments of the present application, the specific implementation steps of the evacuation diagnosis method are exemplified as follows:

[0115] S1: Under the static vehicle condition, perform the dry-run fault determination of the electric drive water pump / battery water pump / heater water pump;

[0116] S2: Execute the evacuation diagnostic mode A or B respectively according to whether there is a dry running fault in the battery water pump;

[0117] SA: Enter the evacuation diagnostic mode A (the first diagnostic strategy):

[0118] SA1: Judge the position state of the current intelligent integrated control multi-way valve component. If the current position is the first preset connection position, go to step SA2; if the current position is the second preset connection position, go to step SA6; if the current position is the third preset connection position, go to step SA12; if the current position is the fourth preset connection position, go to step SA18;

[0119] SA2: Switch the position of the intelligent integrated control multi-way valve to the fourth preset connection position, set the speeds of the electric drive water pump, battery water pump and heater water pump to N1 / N2 / N3 respectively, shield the dry running diagnosis of the water pump, and continuously run for a time TP4;

[0120] SA3: Execute the dry running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, go to the next step;

[0121] SA4: Switch the position of the intelligent integrated control multi-way valve to the first preset connection position, set the speeds of the electric drive water pump, battery water pump and heater water pump to N1 / N2 / N3 respectively, shield the dry running diagnosis of the water pump, and continuously run for a time TP1;

[0122] SA5: Execute the dry running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, jump to step SA24;

[0123] SA6: Switch the position of the intelligent integrated control multi-way valve to the first preset connection position, set the speeds of the electric drive water pump, battery water pump and heater water pump to N1 / N2 / N3 respectively, shield the dry running diagnosis of the water pump, and continuously run for a time TP1;

[0124] SA7: Execute the dry running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, go to the next step;

[0125] SA8: Switch the position of the intelligent integrated control multi-way valve to the fourth preset connection position, set the speeds of the electric drive water pump, battery water pump and heater water pump to N1 / N2 / N3 respectively, shield the dry running diagnosis of the water pump, and continuously run for a time TP4;

[0126] SA9: Execute the dry running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, go to the next step;

[0127] SA10: The intelligent integrated control multi-way valve position is switched to the second preset connection position. Set the speeds of the electric drive water pump, the battery water pump, and the heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP2;

[0128] SA11: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, jump to step SA24;

[0129] SA12: The intelligent integrated control multi-way valve position is switched to the fourth preset connection position. Set the speeds of the electric drive water pump, the battery water pump, and the heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP4;

[0130] SA13: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, proceed to the next step;

[0131] SA14: The intelligent integrated control multi-way valve position is switched to the first preset connection position. Set the speeds of the electric drive water pump, the battery water pump, and the heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP1;

[0132] SA15: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, proceed to the next step;

[0133] SA16: The intelligent integrated control multi-way valve position is switched to the third preset connection position. Set the speeds of the electric drive water pump, the battery water pump, and the heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP3;

[0134] SA17: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, jump to step SA24;

[0135] SA18: The intelligent integrated control multi-way valve position is switched to the first preset connection position. Set the speeds of the electric drive water pump, the battery water pump, and the heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP1;

[0136] SA19: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, proceed to the next step;

[0137] SA20: The intelligent integrated control multi-way valve position is switched to the third preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP3;

[0138] SA21: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, proceed to the next step;

[0139] SA22: The intelligent integrated control multi-way valve position is switched to the fourth preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP4;

[0140] SA23: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SA25; if the fault still exists, jump to step SA24;

[0141] SA24: The process ends, restore the default state, and report the dry-running fault of the water pump;

[0142] SA25: The process ends, restore the default state, the fault is recovered, and the function is normal.

[0143] SB: Enter the evacuation diagnosis mode B:

[0144] SB1: Determine the current intelligent integrated control multi-way valve position status: If the current position is the first preset connection position, enter step SB2; if the current position is the second preset connection position, enter step SB; if the current position is the third preset connection position, enter step SB14; if the current position is the fourth preset connection position, enter step SB18;

[0145] SB2: The intelligent integrated control multi-way valve position is switched to the third preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP3;

[0146] SB3: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step;

[0147] SB4: The intelligent integrated control multi-way valve position is switched to the fourth preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP4;

[0148] SB5: Perform dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step.

[0149] SB6: Intelligently and integrally control the multi-way valve to switch to the first preset connection position, set the rotational speeds of the electric-driven water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively, shield the dry-running diagnosis of the water pump, and continuously operate for a time duration TP1.

[0150] SB7: Perform dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, jump to step SB24.

[0151] SB8: Intelligently and integrally control the multi-way valve to switch to the third preset connection position, set the rotational speeds of the electric-driven water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively, shield the dry-running diagnosis of the water pump, and continuously operate for a time duration TP3.

[0152] SB9: Perform dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step.

[0153] SB10: Intelligently and integrally control the multi-way valve to switch to the fourth preset connection position, set the rotational speeds of the electric-driven water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively, shield the dry-running diagnosis of the water pump, and continuously operate for a time duration TP4.

[0154] SB11: Perform dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step.

[0155] SB12: Intelligently and integrally control the multi-way valve to switch to the second preset connection position, set the rotational speeds of the electric-driven water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively, shield the dry-running diagnosis of the water pump, and continuously operate for a time duration TP2.

[0156] SB13: Perform dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, jump to step SB24.

[0157] SB14: Intelligently and integrally control the multi-way valve to switch to the fourth preset connection position, set the rotational speeds of the electric-driven water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively, shield the dry-running diagnosis of the water pump, and continuously operate for a time duration TP4.

[0158] SB15: Perform dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step.

[0159] SB16: The intelligent integrated control multi-way valve position is switched to the third preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP3;

[0160] SB17: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, jump to step SB24;

[0161] SB18: The intelligent integrated control multi-way valve position is switched to the first preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP1;

[0162] SB19: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step;

[0163] SB20: The intelligent integrated control multi-way valve position is switched to the third preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP3;

[0164] SB2: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, proceed to the next step;

[0165] SB22: The intelligent integrated control multi-way valve position is switched to the fourth preset connection position. Set the rotation speeds of the electric drive water pump, battery water pump, and heater water pump to N1 / N2 / N3 respectively. Shield the dry-running diagnosis of the water pump and continue to run for a duration of TP4;

[0166] SB23: Perform the dry-running fault diagnosis of the water pump. If the fault is recovered, the process ends and jumps to step SB25; if the fault still exists, jump to step SB24;

[0167] SB24: The process ends, the default state is restored, and the dry-running fault of the water pump is reported;

[0168] SB25: The process ends, the default state is restored, the fault is recovered, and the function is normal;

[0169] Among them, N1 / N2 / N3 represents the rotation speed of the water pump, with the unit of rpm; TP1 / TP2 / TP3 / TP4 are the durations, with the unit of seconds;

[0170] It should be noted that the specific parameters (such as rotation speed and duration) set in the above steps can be calibrated and confirmed according to specific circumstances.

[0171] Exemplarily, a thermal management device and an evacuation diagnosis method provided by an embodiment of the present application adopt an integrated design of an integrated multi-way valve component, orderly coupling the electric drive system circuit, the battery system circuit, and the warm air circuit. Compared with the combined design of a three-way valve or a four-way valve in the prior art, the structure is significantly streamlined and the reliability is improved. More importantly, based on the thermal management device mentioned in the present application, a vehicle evacuation diagnosis method is proposed. This method utilizes the static working conditions of the vehicle, through multi-mode combined conditions of the integrated thermal management system, combined with the diagnosis of dry running of the water pump, automatically executes the evacuation diagnosis strategy, and continuously discharges the residual air bubbles in the pipeline. This method only needs to be automatically executed under the static working conditions of the vehicle, such as during the vehicle power-on initialization stage, the pre-power-off sleep stage, the parking charging stage, etc. can be considered, and further can be flexibly executed in combination with the specific working conditions of the vehicle, such as being executed in segments, operating multiple times, and can be repeatedly executed. There is no need for special maintenance means or operation methods to evacuate the vehicle pipeline, reducing the maintenance man-hours and labor costs, facilitating the use of users, filling the domestic technical gap, and having significant innovation significance.

[0172] In all embodiments of the present application, "large" and "small" are relative, "many" and "few" are relative, and "up" and "down" are relative. For such expressions of relative terms, the embodiments of the present application will not elaborate further.

[0173] It should be understood that throughout the specification, the phrases "in this embodiment", "in an embodiment of the present application", or "as an optional implementation manner" mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the phrases "in this embodiment", "in an embodiment of the present application", or "as an optional implementation manner" that appear throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0174] In various embodiments of the present application, it should be understood that the magnitudes of the serial numbers of the above processes do not necessarily mean the inevitable sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0175] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A thermal management device, characterized in that, Applied to an electric vehicle, including an electric drive system circuit, a battery system circuit, a heating circuit, a filling and exhaust circuit, and a multi-way valve component; The electric drive system circuit includes an electric drive system and an electric drive water pump connected in sequence, and the electric drive system and the electric drive water pump are respectively connected to the multi-way valve component; The battery system circuit includes a battery water pump and a power battery connected in sequence, and the battery water pump and the power battery are respectively connected to the multi-way valve component; The heating circuit includes a heating water pump, a PTC mechanism, and a heat exchanger connected in sequence, and the heating water pump and the heat exchanger are respectively connected to the multi-way valve component; The filling and exhaust circuit is connected to the multi-way valve component; The thermal management device is used for: Judging whether the battery water pump has a dry-running fault; If the battery water pump has a dry-running fault, diagnosing and processing the thermal management device according to a first diagnostic strategy; If the battery water pump does not have a dry-running fault, diagnosing and processing the thermal management device according to a second diagnostic strategy.

2. The thermal management device according to claim 1, wherein The heating circuit further includes an electronically controlled three-way valve, the PTC mechanism and the heat exchanger are connected through the first interface and the second interface of the electronically controlled three-way valve, and the third interface of the electronically controlled three-way valve is connected to the multi-way valve component.

3. The thermal management device according to claim 1, wherein, The filling and exhaust circuit includes an expansion tank mechanism, one end of the expansion tank mechanism is connected to the electric drive water pump through the multi-way valve, and the other end of the expansion tank mechanism is connected to the heat exchanger.

4. The thermal management device according to any one of claims 1 to 3, characterized in that, The device adjusts the circulation mode by controlling the connection position of the multi-way valve component, and the connection positions of the multi-way valve component include: A first preset connection position, the electric drive system circuit is an independent internal circulation mode, and the battery system circuit and the heating circuit are connected in series as a large circulation mode; A second preset connection position, the electric drive system circuit, the battery system circuit, and the heating circuit are in an independent internal circulation mode; A third preset connection position, the battery system circuit is in an independent internal circulation mode, and the electric drive system circuit and the heating circuit are connected in series as a large circulation mode; A fourth preset connection position, the electric drive system circuit, the battery system circuit, and the heating circuit are connected in series as a large circulation mode.

5. A method for evacuation diagnosis, characterized in that, Applied to the thermal management device according to claim 4, the method includes: Judging whether the battery water pump has a dry-running fault; If the battery water pump has a dry-running fault, diagnosing and processing the thermal management device according to a first diagnostic strategy; If the battery water pump does not have a dry-running fault, diagnosing and processing the thermal management device according to a second diagnostic strategy; The step of diagnosing and processing the thermal management device according to the first diagnostic strategy or the step of diagnosing and processing the thermal management device according to the second diagnostic strategy includes: Obtaining the connection position state of the multi-way valve component, denoted as the first state; Controlling the connection position of the multi-way valve component to switch to the second state according to the first state; Controlling the electric drive water pump, the battery water pump, and the heating water pump to run according to preset parameters in the second state, shielding the dry-running diagnosis of the water pump, and continuously running for a first preset time; Perform the dry-running fault diagnosis of the water pump for the first time to determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state and the diagnosis process ends; If the fault is not recovered, control the connection position of the multi-way valve component to switch to the third state according to the second state; Under the third state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-running diagnosis of the water pump, and continuously operate for a second preset time; Perform the dry-running fault diagnosis of the water pump for the second time to determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state and the diagnosis process ends; If the fault is not recovered, the multi-way valve component returns to the default state and generates a fault message.

6. The evacuation diagnosis method according to claim 5, characterized in that In the step of diagnosing and processing the thermal management device according to the first diagnosis strategy: If the first state is the first preset connection position, the second state is the fourth preset connection position, and the third state is the first preset connection position; If the first state is the second preset connection position, the second state is the first preset connection position, and the third state is the fourth preset connection position; If the first state is the third preset connection position, the second state is the fourth preset connection position, and the third state is the first preset connection position; If the first state is the fourth preset connection position, the second state is the first preset connection position, and the third state is the third preset connection position.

7. The evacuation diagnosis method according to claim 6, characterized in that, If the first state is one of the second preset connection position, the third preset connection position, and the fourth preset connection position, after the step of performing the dry-running fault diagnosis of the water pump for the second time, the method further includes: Control the connection position of the multi-way valve component to switch to the fourth state according to the third state, and the fourth state is consistent with the first state; Under the fourth state, control the electric drive water pump, the battery water pump, and the heater water pump to operate according to preset parameters, shield the dry-running diagnosis of the water pump, and continuously operate for a third preset time; Perform the dry-running fault diagnosis of the water pump for the third time to determine whether the fault is recovered. If the fault is recovered, the multi-way valve component returns to the default state and the diagnosis process ends.

8. The evacuation diagnosis method according to claim 5, wherein In the step of diagnosing and processing the thermal management device according to the second diagnosis strategy: If the first state is the first preset connection position, the second state is the third preset connection position, and the third state is the fourth preset connection position; If the first state is the second preset connection position, the second state is the third preset connection position, and the third state is the fourth preset connection position; If the first state is the third preset connection position, the second state is the fourth preset connection position, and the third state is the third preset connection position; If the first state is the fourth preset connection position, the second state is the first preset connection position, and the third state is the third preset connection position.

9. The evacuation diagnosis method according to claim 8, wherein, If the first state is one of the first preset connected position, the second preset connected position, and the fourth preset connected position, after the step of performing the dry-running fault diagnosis of the water pump for the second time, the method further includes: Controlling the switching of the connection position of the multi-way valve member to the fourth state according to the third state, and the fourth state is consistent with the first state; Controlling the electric water pump, the battery water pump, and the heater water pump to operate according to preset parameters in the fourth state, shielding the dry-running diagnosis of the water pump, and continuously operating for a third preset time; Performing the dry-running fault diagnosis of the water pump for the third time, determining whether the fault is restored. If the fault is restored, the multi-way valve member returns to the default state, and the diagnosis process ends.

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