Three-in-one thermal management system and control method thereof

Abstract

The invention discloses a three-in-one thermal management system and a control method thereof, and belongs to the technical field of thermal management of finished new energy automobiles. Comprising a power system heat dissipation loop, an air conditioning system loop and a battery system heat dissipation loop, the power system heat dissipation loop, the air conditioning system loop and the battery system heat dissipation loop are all connected with a three-in-one heat manager, and the battery system heat dissipation loop and the air conditioning system loop are connected with a second heat exchanger through pipelines. The battery system heat dissipation loop and the air-conditioning system loop are used for heat exchange; and the three-in-one heat manager is used for reasonably allocating heat of the power system heat dissipation loop, the battery system heat dissipation loop and the air conditioning system loop. Heat of each system loop is reasonably allocated, energy waste is reduced, independent heat management systems of the power system, the battery system and the air conditioning system are reduced through the three-in-one heat management system, and the cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal management of new energy vehicles, and specifically relates to a three-in-one thermal management system and a control method thereof. Background Art

[0002] With the continuous development of electrification of construction machinery, technological innovation is an inevitable trend. Unified integration of multiple systems of the entire vehicle can effectively reduce costs, reduce resource waste and improve product performance.

[0003] For example, most of the current engineering machinery's laminated battery packs (BMS), power systems, and air-conditioning systems are each equipped with corresponding thermal management systems, and the energy between systems cannot be reasonably distributed, resulting in a waste of resources. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] The purpose of the present invention is to solve the problem that the existing battery system, power system and air conditioning system are respectively equipped with independent thermal management systems, and the energy between the systems cannot be reasonably distributed and used, resulting in energy waste.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the technical solution provided by the present invention is:

[0008] A three-in-one thermal management system of the present invention includes a power system heat dissipation circuit, a battery system heat dissipation circuit and an air conditioning system circuit;

[0009] The power system heat dissipation circuit includes a three-in-one heat manager, a drive motor, a working motor and a six-in-one controller that are cyclically connected;

[0010] The battery system heat dissipation circuit includes the three-in-one heat manager, three-way solenoid valve 1, water pump and power battery pack in a cyclic connection;

[0011] The air conditioning system loop includes the three-in-one thermal manager, compressor and evaporator in circular communication;

[0012] The battery system heat dissipation circuit and the air conditioning system circuit are connected by a pipeline with a second heat exchanger for heat exchange between the battery system heat dissipation circuit and the air conditioning system circuit;

[0013] The three-in-one thermal manager is used to reasonably allocate the heat of the power system cooling circuit, the battery system cooling circuit and the air conditioning system circuit.

[0014] Preferably, the three-in-one thermal manager includes a power system radiator, a heat exchanger 1, a battery system radiator and a condenser which are arranged in sequence, the power system radiator is used for heat allocation of the power system, the battery system radiator is used for heat allocation of the power battery pack, the power system radiator and the battery system radiator exchange heat with each other through the heat exchanger 1, and the condenser is used to allocate heat to the air-conditioning system and exchange heat with the battery system radiator through the heat exchanger 2.

[0015] Preferably, the power system heat dissipation circuit includes the power system radiator, the drive motor, the working motor and the six-in-one controller which are cyclically connected;

[0016] The battery system heat dissipation circuit includes the battery system radiator, three-way solenoid valve 3, water pump and power battery pack which are cyclically connected;

[0017] The air conditioning system loop includes a condenser, a compressor and an evaporator which are cyclically connected, and the pipeline where the evaporator is located is connected in parallel with the pipeline where the heat exchanger is located.

[0018] Preferably, the liquid inlet pipe of the power system radiator is connected to a three-way solenoid valve 2, and the output port 1 of the three-way solenoid valve 2 is connected to the liquid outlet pipe of the power system radiator;

[0019] The liquid inlet pipe of the battery system radiator is connected to a three-way solenoid valve three, and the output port three of the three-way solenoid valve three is connected to the liquid outlet pipe of the battery system radiator;

[0020] The liquid inlet of the heat exchange tube 1 of the heat exchanger 1 is connected to the output port 2 of the three-way solenoid valve 2, and the liquid outlet of the heat exchange tube 1 is connected to the liquid outlet pipe of the power system radiator; the liquid inlet of the heat exchange tube 2 of the heat exchanger 1 is connected to the output port 4 of the three-way solenoid valve 3, and the liquid outlet of the heat exchange tube 2 is connected to the liquid outlet pipe of the battery system radiator, and the heat exchange tube 1 and the heat exchange tube 2 exchange heat by using the temperature difference in the heat exchanger 1.

[0021] Preferably, the input port of the three-way solenoid valve one is connected to the liquid outlet pipe of the battery system radiator, the output port five of the three-way solenoid valve one is connected to the water pump and the power battery pack through a pipeline, the output port six of the three-way solenoid valve one is connected to the heat exchanger one through a pipeline, and the pipeline connected to the output port five of the three-way solenoid valve one is connected in parallel with the pipeline connected to the output port six of the three-way solenoid valve one.

[0022] A control method for a three-in-one thermal management system, the method is performed using the above thermal management system, the method is:

[0023] S1. BMS detects the temperature T of the power battery pack and transmits the value of the temperature T to VCU;

[0024] S2. VCU determines whether the detected temperature T is greater than 35°C. When T>35°C, execute step S3; when T≤35°C, execute step S4;

[0025] S3, the VCU sends a control signal to the BMS, and the BMS controls the three-way solenoid valve 1 to open and the compressor to perform forced cooling, and performs heat exchange through the heat exchanger 2 to cool the power battery pack;

[0026] S4, VCU determines whether the detected temperature T is greater than 28°C. When T>28°C, execute step S5; when T≤28°C, execute step S6;

[0027] S5, VCU sends a control signal to BMS, BMS controls the input port and output port 5 of the three-way solenoid valve 1 to open, and the output port 6 to close, and opens the heat dissipation circuit of the battery system for cooling;

[0028] S6. The VCU determines whether the detected temperature T is greater than 20°C. When T>20°C, step S7 is executed; when T≤20°C, step S8 is executed;

[0029] S7, the VCU sends a control signal to the BMS, and the power battery pack enters a self-circulation mode;

[0030] S8, VCU determines whether the detected temperature T is greater than 5°C. When T≤5°C, execute step S9; when T>5°C, execute step S10;

[0031] S9, the VCU sends a control signal to the BMS to close the cooling cycle of the power battery pack;

[0032] S10, the VCU detects the power system temperature T1 and transmits the value of the temperature T1 to the VCU;

[0033] S11, VCU determines whether the detected temperature T1 is greater than 30°C, when T1>30°C, execute step S12, when T1≤30°C, execute step S10;

[0034] S12, the VCU sends a control signal to the BMS to control the opening of three-way solenoid valve 2 and three-way solenoid valve 3, so as to exchange heat between the heat dissipation circuit of the battery system and the heat dissipation circuit of the power system through the heat exchanger 1.

[0035] Preferably, in step S12, controlling to open three-way solenoid valve two and three-way solenoid valve three specifically includes: closing output port one of three-way solenoid valve two and output port three of three-way solenoid valve three, opening output port two and output port four, so that heat exchange tube one and heat exchange tube two perform heat exchange using temperature difference.

[0036] A control method for a three-in-one thermal management system, the method is performed using the above thermal management system, the method is:

[0037] B1. Air conditioning system affects the interior temperature T in Test and set T in The value is transmitted to VCU;

[0038] B2, VCU will set the car interior temperature T in With the set temperature T set By comparison, we can get the temperature difference ΔT = T in -T set ;

[0039] B3, VCU sends cooling demand to the air conditioning system based on the temperature difference ΔT;

[0040] B4. The air conditioning system turns on the condenser for cooling according to the cooling demand.

[0041] Preferably, in step B3, the refrigeration demand is specifically: 42%, 57%, 71% and 100%; when ΔT<-1°C, the refrigeration demand is 42%; when -1°C<ΔT≤2°C, the refrigeration demand is 57%; when 2°C<ΔT≤4°C, the refrigeration demand is 71%; when ΔT>4°C, the refrigeration demand is 100%.

[0042] 3. Beneficial effects

[0043] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0044] A three-in-one thermal management system and a control method thereof of the present invention include a power system heat dissipation circuit, a battery system heat dissipation circuit and an air conditioning system circuit; the power system heat dissipation circuit includes a three-in-one thermal manager, a drive motor, a working motor and a six-in-one controller that are cyclically connected; the battery system heat dissipation circuit includes the three-in-one thermal manager, a three-way solenoid valve 1, a water pump and a power battery pack that are cyclically connected; the air conditioning system circuit includes the three-in-one thermal manager, a compressor and an evaporator that are cyclically connected; the battery system heat dissipation circuit and the air conditioning system circuit are connected by a pipeline with a heat exchanger 2 for heat exchange between the battery system heat dissipation circuit and the air conditioning system circuit; the three-in-one thermal manager is used to reasonably allocate the heat of the power system heat dissipation circuit, the battery system heat dissipation circuit and the air conditioning system circuit. This application uses a three-in-one thermal management system to reasonably allocate the heat of each system circuit to reduce energy waste, and uses a three-in-one thermal management system to reduce the thermal management systems independently configured for the power system, battery system and air conditioning system, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of a three-in-one thermal management system of the present invention;

[0046] Figure 2 It is a partial structural schematic diagram of a three-in-one thermal management device of the present invention;

[0047] Figure 3 The figure is a flow chart of a control method of a three-in-one thermal management system of the present invention.

[0048] Explanation of the symbols in the schematic diagram:

[0049] 100. Three-in-one thermal manager;

[0050] 110, power system radiator; 111, six-in-one controller; 112, working motor; 113, drive motor; 114, three-way solenoid valve 2, 114b, output port 1; 114c, output port 2;

[0051] 120, heat exchanger 1; 121, heat exchange tube 1; 122, heat exchange tube 2;

[0052] 130, battery system radiator; 131, three-way solenoid valve three; 131b, output port three; 131c, output port four; 132, three-way solenoid valve one; 132a, input port; 132b, output port five; 132c, output port six; 133, water pump; 134, power battery pack;

[0053] 140. Condenser; 141. Compressor; 142. Evaporator; 143. Heat exchanger 2. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0055] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "center", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0057] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency 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.

[0058] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" 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 an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be 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.

[0059] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0060] Example 1

[0061] See attached Figure 1-2 A three-in-one thermal management system of this embodiment includes a power system heat dissipation circuit, a battery system heat dissipation circuit and an air-conditioning system circuit. The power system heat dissipation circuit uses a water preparation circulation to regulate the temperature of the power system to ensure that the power system is in normal operation. The battery system heat dissipation circuit uses a water preparation circulation to regulate the temperature of the battery system to ensure that the battery system is in normal operation. The air-conditioning system uses a refrigerant circulation to regulate the ambient temperature in the vehicle to ensure a comfortable environment in the vehicle.

[0062] The power system heat dissipation circuit includes a three-in-one thermal manager 100, a drive motor 113, a working motor 112 and a six-in-one controller 111 that are cyclically connected; the battery system heat dissipation circuit includes the three-in-one thermal manager 100, a three-way solenoid valve 132, a water pump 133 and a power battery pack 134 that are cyclically connected; the air-conditioning system circuit includes the three-in-one thermal manager 100, a compressor 141 and an evaporator 142 that are cyclically connected; the battery system heat dissipation circuit and the air-conditioning system circuit are connected by a pipeline with a heat exchanger 2 143 for heat exchange between the battery system heat dissipation circuit and the air-conditioning system circuit; the three-in-one thermal manager 100 is used to reasonably allocate the heat of the power system heat dissipation circuit, the battery system heat dissipation circuit and the air-conditioning system circuit, reduce heat waste between the systems, and reduce the energy consumption of the vehicle.

[0063] The three-in-one thermal manager 100 includes a power system radiator 110, a heat exchanger 120, a battery system radiator 130 and a condenser 140 which are arranged in sequence. The power system radiator 110 is used for heat allocation of the power system so that the power system maintains a normal operating temperature. The battery system radiator 130 is used for heat allocation of the power battery pack 134 so that the power system maintains a normal operating temperature. The power system radiator 110 and the battery system radiator 130 exchange heat through the heat exchanger 120 to reasonably allocate heat between the power system and the battery system, reduce energy waste between the various systems, and reduce energy waste. The condenser 140 is used to allocate heat to the air-conditioning system to maintain a comfortable environment in the vehicle, and exchanges heat with the battery system radiator 130 through the heat exchanger 2 143 to reasonably allocate heat between the air-conditioning system and the battery system, reduce energy waste between the various systems, and reduce energy waste.

[0064] The power system heat dissipation circuit specifically includes the power system radiator 110, the drive motor 113, the working motor 112 and the six-in-one controller 111 which are cyclically connected. The liquid inlet pipe of the power system radiator 110 is connected with the three-way solenoid valve 114, and the output port 114b of the three-way solenoid valve 114 is connected with the liquid outlet pipe of the power system radiator 110. When the power system heat dissipation circuit is started, the water preparation passes through the three-way solenoid valve 114 in the power system radiator 110 in turn, flows out from the output port 114b of the three-way solenoid valve 114, passes through the drive motor 113, the working motor 112 and the six-in-one controller 111 in turn, and adjusts the temperature of the drive motor 113 and the working motor 112 to maintain the normal working temperature of the drive motor 113 and the working motor 112.

[0065] The battery system heat dissipation circuit specifically includes the battery system radiator 130, the three-way solenoid valve 132, the water pump 133 and the power battery pack 134 which are cyclically connected. The liquid inlet pipe of the battery system radiator 130 is connected with the three-way solenoid valve 131, and the output port 131b of the three-way solenoid valve 131 is connected with the liquid outlet pipe of the battery system radiator 130. When the battery system heat dissipation circuit is started, the water preparation passes through the three-way solenoid valve 131 in the battery system radiator 130 in turn, and flows out from the output port 131b of the three-way solenoid valve 131, passes through the water pump 133 and the power battery pack 134 in turn, and adjusts the temperature of the power battery pack 134 to ensure that the power battery pack 134 maintains a normal operating temperature.

[0066] The battery system heat dissipation circuit and the power system heat dissipation circuit are respectively connected to expansion kettles for replenishing the water preparation lost in each circuit.

[0067] The liquid inlet of the heat exchange tube 121 of the heat exchanger 120 is connected to the output port 2 114c of the three-way solenoid valve 2 114, and the liquid outlet of the heat exchange tube 121 is connected to the liquid outlet pipe of the power system radiator 110; the liquid inlet of the heat exchange tube 2 122 of the heat exchanger 120 is connected to the output port 4 131c of the three-way solenoid valve 3 131, and the liquid outlet of the heat exchange tube 2 122 is connected to the liquid outlet pipe of the battery system radiator 130. The heat exchange tube 121 and the heat exchange tube 2 122 exchange heat in the heat exchanger 120 using the temperature difference, so that the heat of the battery system heat dissipation circuit and the heat of the power system heat dissipation circuit are exchanged in the heat exchange tube 2 122, thereby reducing energy waste and energy consumption.

[0068] The air-conditioning system loop specifically includes a condenser 140, a compressor 141 and an evaporator 142 that are cyclically connected. The pipeline where the evaporator 142 is located is connected in parallel with the pipeline where the heat exchanger 120 is located. When the air-conditioning system loop is started, the refrigerant is compressed by the compressor 141, passes through the condenser 140, releases heat, cools into a liquid state, enters the evaporator 142, absorbs heat in the vehicle, and regulates the ambient temperature in the vehicle to ensure a comfortable environment in the vehicle.

[0069] The input port 132a of the three-way solenoid valve 132 is connected to the liquid outlet pipe of the battery system radiator 130, the output port 5 132b of the three-way solenoid valve 132 is connected to the water pump 133 and the power battery pack 134 through a pipeline, the output port 6 132c of the three-way solenoid valve 132 is connected to the heat exchanger 120 through a pipeline, the pipeline connected to the output port 5 132b of the three-way solenoid valve 132 is connected in parallel with the pipeline connected to the output port 6 132c of the three-way solenoid valve 132, when the temperature of the power battery pack 134 is high, the battery system heat dissipation circuit performs water preparation circulation cooling, and the temperature cannot be effectively reduced, the three-way The input port 132a of the solenoid valve 132 is closed, and the output ports 5 132b and 6 132c of the three-way solenoid valve 132 are opened. The air-conditioning system circuit and the battery system heat dissipation circuit exchange heat in the heat exchanger 120. The water preparation flows in from the output port 5 132b of the three-way solenoid valve 132, passes through the output port 6 132c of the three-way solenoid valve 132, the water pump 133 and the power battery pack 134 in sequence, and forces the power battery pack 134 to cool down, so as to keep the power battery pack 134 at a normal operating temperature in a short time, thereby ensuring that the power battery pack 134 maintains a normal operating temperature.

[0070] Example 2

[0071] See attached Figure 3 , a control method of a three-in-one thermal management system of this embodiment is implemented by using the thermal management system described in Example 1, and the method is:

[0072] S1. The BMS detects the temperature T of the power battery pack 134 and transmits the value of the temperature T to the VCU;

[0073] S2. VCU determines whether the detected temperature T is greater than 35°C. When T>35°C, execute step S3; when T≤35°C, execute step S4;

[0074] S3, VCU sends a control signal to BMS, BMS controls the three-way solenoid valve 132 to open and the compressor 141 to perform forced cooling, and performs heat exchange through the heat exchanger 2 143 to cool the power battery pack 134. When the temperature T of the power battery pack 134 is greater than 35°C, the temperature of the power battery pack 134 is too high, and the water-based circulating cooling of the air-conditioning system loop cannot quickly cool it down. BMS controls the compressor 141 to perform cooling, and controls the input port 132a of the three-way solenoid valve 132 to close. The output port five 132b and the output port six 132c of the valve one 132 are opened, the air conditioning system loop and the battery system heat dissipation loop perform heat exchange in the heat exchanger one 120, the water preparation flows in from the output port five 132b of the three-way solenoid valve one 132, passes through the output port six 132c of the three-way solenoid valve one 132, the water pump 133 and the power battery pack 134 in sequence, and the power battery pack 134 is forced to cool down, so as to keep the power battery pack 134 down to the normal operating temperature in a short time, and ensure that the power battery pack 134 maintains the normal operating temperature;

[0075] S4, VCU determines whether the detected temperature T is greater than 28°C. When T>28°C, execute step S5; when T≤28°C, execute step S6;

[0076] S5. The VCU sends a control signal to the BMS, and the BMS controls the input port 132a and the output port 5 132b of the three-way solenoid valve 132 to be opened, and the output port 6 132c to be closed, and the heat dissipation circuit of the battery system is turned on for cooling, so as to effectively reduce the operating temperature of the power battery pack 134 and ensure that the power battery pack 134 maintains a normal operating temperature;

[0077] S6. The VCU determines whether the detected temperature T is greater than 20°C. When T>20°C, step S7 is executed; when T≤20°C, step S8 is executed;

[0078] S7, the VCU sends a control signal to the BMS, and the power battery pack 134 enters a self-circulation mode, in which the pipelines between the batteries in the power battery pack 134 perform internal circulation, and the temperature does not need to be adjusted through external pipelines;

[0079] S8, VCU determines whether the detected temperature T is greater than 5°C. When T≤5°C, execute step S9; when T>5°C, execute step S10;

[0080] S9, the VCU sends a control signal to the BMS to close the cooling cycle of the power battery pack 134;

[0081] S10, the VCU detects the power system temperature T1 and transmits the value of the temperature T1 to the VCU;

[0082] S11, VCU determines whether the detected temperature T1 is greater than 30°C, when T1>30°C, execute step S12, when T1≤30°C, execute step S10;

[0083] S12, VCU sends a control signal to BMS to control the opening of three-way solenoid valve 2 114 and three-way solenoid valve 3 131, and uses heat exchanger 120 for heat exchange between the heat dissipation circuit of the battery system and the heat dissipation circuit of the power system. At this time, the temperature of the power system is too high and the temperature of the heat dissipation circuit of the battery system is too low. In order to avoid energy waste, energy exchange is performed through heat exchanger 120 to avoid energy waste, while reducing the working intensity of each system and effectively reducing the operating loss of the equipment.

[0084] In the step S12, controlling the opening of the three-way solenoid valve 2 114 and the three-way solenoid valve 3 131 specifically includes: closing the output port 1 14b of the three-way solenoid valve 2 114 and the output port 3 131b of the three-way solenoid valve 3 131, and opening the output port 2 114c and the output port 4 131c, so that the heat exchange tube 1 121 and the heat exchange tube 2 122 exchange heat using the temperature difference.

[0085] Example 3

[0086] A control method for a three-in-one thermal management system of this embodiment is implemented by using the thermal management system described in Embodiment 1. The method is as follows:

[0087] B1. Air conditioning system affects the interior temperature T in Test and set T in The value is sent to VCU, and the interior temperature T in is the return air temperature in the vehicle;

[0088] B2, VCU will set the car interior temperature T in With the set temperature T set By comparison, we can get the temperature difference ΔT = T in -T set , set temperature T set Set to the temperature set on the air conditioning system. The driver selects the air conditioning system to set the temperature T according to his own needs. set ;

[0089] B3, VCU sends cooling demand to the air conditioning system based on the temperature difference ΔT;

[0090] B4. The air conditioning system turns on the condenser 140 for cooling according to the cooling demand.

[0091] In step B3, the cooling demand is specifically: 42%, 57%, 71% and 100%; when ΔT<-1°C, the cooling demand is 42%; when -1°C<ΔT≤2°C, the cooling demand is 57%; when 2°C<ΔT≤4°C, the cooling demand is 71%; when ΔT>4°C, the cooling demand is 100%. The larger the temperature difference ΔT, the higher the temperature inside the vehicle T in With the set temperature T set The greater the difference, the greater the amount of heat that needs to be exchanged in the car. In order to quickly and effectively reduce the temperature in the car, the VCU sends a cooling demand to the air-conditioning system based on the temperature difference ΔT. The air-conditioning system quickly and effectively cools down according to different cooling demands to avoid energy waste.

[0092] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A three-in-one thermal management system, characterized in that: Including power system cooling circuit, battery system cooling circuit and air conditioning system circuit; The power system heat dissipation circuit comprises a three-in-one heat manager (100), a drive motor (113), a working motor (112) and a six-in-one controller (111) which are cyclically connected; The battery system heat dissipation circuit comprises the three-in-one heat manager (100), a three-way solenoid valve (132), a water pump (133) and a power battery pack (134) which are cyclically connected; The air conditioning system loop comprises the three-in-one thermal manager (100), a compressor (141) and an evaporator (142) which are cyclically connected; The battery system heat dissipation circuit and the air conditioning system circuit are connected via a pipeline to a second heat exchanger (143) for heat exchange between the battery system heat dissipation circuit and the air conditioning system circuit; The three-in-one thermal manager (100) is used to reasonably allocate the heat of the power system cooling circuit, the battery system cooling circuit and the air conditioning system circuit.

2. A three-in-one thermal management system according to claim 1, characterized in that: The three-in-one thermal manager (100) comprises a power system radiator (110), a heat exchanger 1 (120), a battery system radiator (130) and a condenser (140) which are arranged in sequence. The power system radiator (110) is used for heat allocation of the power system, the battery system radiator (130) is used for heat allocation of the power battery pack (134), the power system radiator (110) and the battery system radiator (130) perform heat exchange via the heat exchanger 1 (120), and the condenser (140) is used for heat allocation of the air conditioning system and performs heat exchange with the battery system radiator (130) via the heat exchanger 2 (143).

3. A three-in-one thermal management system according to claim 2, characterized in that: The power system heat dissipation circuit comprises the power system radiator (110), a drive motor (113), a working motor (112) and a six-in-one controller (111) which are cyclically connected; The battery system heat dissipation circuit comprises the battery system radiator (130), a three-way solenoid valve (132), a water pump (133) and a power battery pack (134) which are cyclically connected; The air conditioning system loop comprises a condenser (140), a compressor (141) and an evaporator (142) which are cyclically connected, and the pipeline where the evaporator (142) is located is connected in parallel with the pipeline where the heat exchanger 1 (120) is located.

4. A three-in-one thermal management system according to claim 3, characterized in that: The liquid inlet pipe of the power system radiator (110) is connected to a three-way solenoid valve 2 (114), and the output port 1 (114b) of the three-way solenoid valve 2 (114) is connected to the liquid outlet pipe of the power system radiator (110); The liquid inlet pipe of the battery system radiator (130) is connected to a three-way solenoid valve (131), and the output port (131b) of the three-way solenoid valve (131) is connected to the liquid outlet pipe of the battery system radiator (130); The liquid inlet of the heat exchange tube 1 (121) of the heat exchanger 1 (120) is connected to the output port 2 (114c) of the three-way solenoid valve 2 (114), and the liquid outlet of the heat exchange tube 1 (121) is connected to the liquid outlet pipe of the power system radiator (110); the liquid inlet of the heat exchange tube 2 (122) of the heat exchanger 1 (120) is connected to the output port 4 (131c) of the three-way solenoid valve 3 (131), and the liquid outlet of the heat exchange tube 2 (122) is connected to the liquid outlet pipe of the battery system radiator (130), and the heat exchange tube 1 (121) and the heat exchange tube 2 (122) perform heat exchange in the heat exchanger 1 (120) by using the temperature difference.

5. A three-in-one thermal management system according to claim 4, characterized in that: The input port (132a) of the three-way solenoid valve one (132) is connected to the liquid outlet pipe of the battery system radiator (130), the output port five (132b) of the three-way solenoid valve one (132) is connected to the water pump (133) and the power battery pack (134) through a pipeline, the output port six (132c) of the three-way solenoid valve one (132) is connected to the heat exchanger one (120) through a pipeline, and the pipeline connected to the output port five (132b) of the three-way solenoid valve one (132) is connected in parallel with the pipeline connected to the output port six (132c) of the three-way solenoid valve one (132).

6. A control method for a three-in-one thermal management system, characterized in that: The method is performed using the thermal management system according to any one of claims 1 to 5, and the method is: S1. The BMS detects the temperature T of the power battery pack (134) and transmits the value of the temperature T to the VCU; S2. VCU determines whether the detected temperature T is greater than 35°C. When T>35°C, execute step S3; when T≤35°C, execute step S4; S3, the VCU sends a control signal to the BMS, and the BMS controls the three-way solenoid valve 1 (132) to open and the compressor (141) to perform forced cooling, and performs heat exchange through the heat exchanger 2 (143) to cool the power battery pack (134); S4, VCU determines whether the detected temperature T is greater than 28°C. When T>28°C, execute step S5; when T≤28°C, execute step S6; S5, the VCU sends a control signal to the BMS, and the BMS controls the input port (132a) and the output port five (132b) of the three-way solenoid valve one (132) to open, and the output port six (132c) to close, and opens the heat dissipation circuit of the battery system for cooling; S6. The VCU determines whether the detected temperature T is greater than 20°C. When T>20°C, step S7 is executed; when T≤20°C, step S8 is executed; S7, the VCU sends a control signal to the BMS, and the power battery pack (134) enters a self-circulation mode; S8, VCU determines whether the detected temperature T is greater than 5°C. When T≤5°C, execute step S9; when T>5°C, execute step S10; S9, the VCU sends a control signal to the BMS to close the cooling cycle of the power battery pack (134); S10, the VCU detects the power system temperature T1 and transmits the value of the temperature T1 to the VCU; S11, VCU determines whether the detected temperature T1 is greater than 30°C, when T1>30°C, execute step S12, when T1≤30°C, execute step S10; S12, the VCU sends a control signal to the BMS to control the opening of the three-way solenoid valve 2 (114) and the three-way solenoid valve 3 (131), so as to exchange heat between the heat dissipation circuit of the battery system and the heat dissipation circuit of the power system through the heat exchanger 1 (120).

7. The control method of a three-in-one thermal management system according to claim 6, characterized in that: In the step S12, controlling the opening of the three-way solenoid valve 2 (114) and the three-way solenoid valve 3 (131) specifically includes: closing the output port 1 (114b) of the three-way solenoid valve 2 (114) and the output port 3 (131b) of the three-way solenoid valve 3 (131), and opening the output port 2 (114c) and the output port 4 (131c), so that the heat exchange tube 1 (121) and the heat exchange tube 2 (122) perform heat exchange by utilizing the temperature difference.

8. A control method for a three-in-one thermal management system, characterized in that: The method is performed using the thermal management system according to any one of claims 1 to 5, and the method is: B1. Air conditioning system affects the interior temperature T in Test and set T in The value is transmitted to VCU; B2, VCU will set the car interior temperature T in With the set temperature T set By comparison, we can get the temperature difference ΔT = T in -T set ; B3, VCU sends cooling demand to the air conditioning system based on the temperature difference ΔT; B4. The air conditioning system turns on the condenser (140) to perform cooling according to the cooling demand.

9. A control method for a three-in-one thermal management system according to claim 8, characterized in that: In step B3, the refrigeration demand is specifically: 42%, 57%, 71% and 100%; when ΔT<-1°C, the refrigeration demand is 42%; when -1°C<ΔT≤2°C, the refrigeration demand is 57%; when 2°C<ΔT≤4°C, the refrigeration demand is 71%; when ΔT>4°C, the refrigeration demand is 100%.

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