Cooperative thermal management system for new energy engineering machinery

Abstract

The utility model relates to a cooperative thermal management system for new energy engineering machinery, and belongs to the technical field of new energy hybrid power cooperative thermal management. The system comprises an engine heat dissipation loop, a power battery heat dissipation loop, a motor heat dissipation loop, a first heat exchanger and a second heat exchanger. A single-side interface of the second heat exchanger is communicated to an engine heat dissipation loop, and the other single-side interface of the second heat exchanger is communicated to an air conditioner pipeline of a power battery heat dissipation loop; the first heat exchanger is connected into an engine heat dissipation loop through a single-side connector, and the first heat exchanger is connected into a power battery heat dissipation loop through the other-side connector. The motor heat dissipation loop is connected to the first heat exchanger in parallel. According to the cooperative heat management system for the new energy engineering machinery, improvement is carried out on the basis of an original independent heat dissipation loop, the three independent loops are connected, matched with one another and cooperatively controlled, the heat dissipation and preheating requirements of the whole power system can be met, heat can be reasonably utilized, and the energy utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of collaborative heat management system for new energy engineering machinery, belong to new energy hybrid power collaborative heat management technical field. BACKGROUND

[0002] With the increasingly serious problems of environmental pollution and oil resource shortage, the development and application of new energy vehicles have received more and more attention. As the current mainstream new energy technology, plug-in hybrid power has advantages such as low cost, unlimited endurance and no technical barriers compared to pure electric technology and fuel cell technology, and has been gradually popularized and applied in the field of engineering machinery.

[0003] Compared with traditional fuel vehicles, the heat management system of the range-extender hybrid power assembly not only includes traditional mechanical heat sources such as engines, gearboxes and air conditioners, but also includes electronic components such as motors, motor controllers and power batteries. The coolant temperature of the engine is much higher than that of the electronic components, and the coolant temperature of the motor and motor controller is higher than that of the power battery. This increases the number of heat sources in the entire heat management system and widens the temperature control range. Currently, the range-extender hybrid vehicle uses a scheme in which each heat source is independently cooled, i.e., the engine cooling circuit, the battery cooling circuit and the motor cooling circuit are independent of each other. Although this scheme is relatively simple and easy to operate, different temperature circuits cannot work collaboratively, and the excess heat cannot be reused, which inevitably causes energy waste. SUMMARY

[0004] The utility model provides a kind of collaborative heat management system for new energy engineering machinery to solve the above problems.

[0005] The utility model adopts the following technical solutions:

[0006] The utility model discloses a kind of collaborative heat management system for new energy engineering machinery;Including engine cooling circuit, power battery cooling circuit, motor cooling circuit, heat exchanger one, heat exchanger two;

[0007] The single-sided interface of heat exchanger two is communicated to the engine cooling circuit, and the other single-sided interface of heat exchanger two is communicated to the air conditioning pipeline of the power battery cooling circuit;

[0008] The heat exchanger one is incorporated into the engine cooling circuit by single-sided interface, and the heat exchanger one is incorporated into the power battery cooling circuit by the other side interface;

[0009] The motor cooling circuit is connected in parallel to the heat exchanger one.

[0010] The utility model discloses a new energy engineering machinery is with collaborative formula heat management system, heat exchanger one side's input, output end is connected on electronic valve one and electronic valve eight on power battery heat dissipation loop respectively.

[0011] Heat exchanger one another side's input, output end is connected on engine heat dissipation loop respectively.

[0012] The utility model discloses a new energy engineering machinery is with collaborative formula heat management system, heat exchanger two and engine heat dissipation loop connection one side's input end pipeline are connected with electronic valve four.

[0013] The utility model discloses a new energy engineering machinery is with collaborative formula heat management system, it is characterized by: heat exchanger one unilateral interface is the upper input lower output formula input, output interface or lower input upper output formula input, output interface;

[0014] The output of motor heat dissipation loop is connected through the input, output interface that heat exchanger one and power battery heat dissipation loop are communicated with by connecting electronic valve five;

[0015] The output of motor heat dissipation loop is connected through the input, output interface that heat exchanger one and power battery heat dissipation loop are communicated with by connecting electronic valve seven.

[0016] The utility model discloses a new energy engineering machinery is with collaborative formula heat management system, heat exchanger one and power battery heat dissipation loop intercommunication one side input, output end, and this output connects electronic valve two.

[0017] Beneficial effect

[0018] 1, the utility model provides a new energy engineering machinery is with collaborative formula heat management system, improves on the basis of original independent heat dissipation loop, connects three sets of independent loop, mutually cooperates, cooperates control, can guarantee whole power system heat dissipation and preheating demand again, can also utilize heat reasonably, improves energy utilization.

[0019] 2, the utility model provides a new energy engineering machinery is with collaborative formula heat management system, and proposes an electronic component preheating scheme, connects engine heat dissipation loop with battery heat dissipation loop, motor heat dissipation loop, so that the heat that engine works generates can supply battery, motor preheating, realizes the reasonable distribution of heat, improves energy utilization.

[0020] 3, the utility model provides a new energy engineering machinery is with collaborative formula heat management system, and proposes an engine preheating scheme, connects motor heat dissipation loop with engine small circulation loop, so that the heat that motor works generates can supply engine preheating, improves energy utilization.

[0021] 4. The new energy engineering machinery collaborative thermal management system provided by the utility model connects the air conditioner end of the engine heat dissipation circuit and the battery heat dissipation circuit, and utilizes the cooling capacity of the air conditioner to assist the engine heat dissipation. The engine heat dissipation circuit, the motor heat dissipation circuit and the battery heat dissipation circuit are connected, cooperatively managed, and the waste heat resources and refrigeration resources in the whole power system are allocated and utilized, thereby reducing energy waste and greatly improving resource utilization.

[0022] 5. The new energy engineering machinery collaborative thermal management system provided by the utility model utilizes the preheating scheme of the engine and the motor, utilizes the waste heat generated by each heat source to heat other components, not only reasonably utilizes the heat resources of each circuit, but also enables each component to quickly reach the optimal working temperature in a low-temperature environment, thereby greatly improving the working efficiency.

[0023] 6. The new energy engineering machinery collaborative thermal management system provided by the utility model utilizes the cold source of the battery heat dissipation circuit to assist the heat dissipation of the engine, improves the heat dissipation capacity of the engine heat dissipation circuit, and guarantees the normal operation of the engine under extreme harsh working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the new energy engineering machinery collaborative thermal management system of the utility model;

[0025] Figure 2 It is a schematic diagram of the engine heat dissipation circuit in the new energy engineering machinery collaborative thermal management system of the utility model.

[0026] Figure 3 It is a schematic diagram of the power battery heat dissipation circuit in the new energy engineering machinery collaborative thermal management system of the utility model.

[0027] Figure 4 It is a schematic diagram of the motor heat dissipation circuit in the new energy engineering machinery collaborative thermal management system of the utility model.

[0028] In the drawing, 1 is an expansion water tank one, 2 is an engine, 3 is a thermostat, 4 is a radiator water pump, 5 is a radiator, 6 is an expansion water tank two, 7 is a radiator, 8 is an electronic water pump one, 11 is an electronic water pump two, 9 is a motor, 10 is a motor controller, 12 is a multi-in-one controller, 13 is a charger, 14 is an electronic water pump, 15 is a power battery, 16 is a power battery heat exchanger, 19 is a heat exchanger one, 23 is a heat exchanger two, 17 is an air conditioner, 18 is an expansion valve, 20 is an electronic valve one, 21 is an electronic valve two, 22 is an electronic valve three, 24 is an electronic valve four, 25 is an electronic valve five, 26 is an electronic valve six, 27 is an electronic valve seven, and 28 is an electronic valve eight. DETAILED DESCRIPTION

[0029] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] like Figure 1 As shown: A collaborative thermal management system for new energy engineering machinery; including an engine cooling circuit, a power battery cooling circuit, a motor cooling circuit, a heat exchanger 19, and a heat exchanger 23.

[0031] One side of the heat exchanger 23 is connected to the engine cooling circuit, and the other side of the heat exchanger 23 is connected to the air conditioning pipe of the power battery cooling circuit.

[0032] The heat exchanger 19 is connected to the engine cooling circuit through a single-sided interface, and the heat exchanger 19 is connected to the power battery cooling circuit through the other-sided interface.

[0033] The motor cooling circuit is connected in parallel to heat exchanger 19.

[0034] like Figure 2 As shown, the engine cooling circuit consists of an expansion tank 1, an engine 2, a thermostat 3, a water pump 4, and a radiator 5.

[0035] In this circuit, engine 2, thermostat 3, radiator pump 4 and radiator 5 are connected in series to form circuit A; engine 2, thermostat 3, radiator pump 4 form circuit B; engine 2 and radiator 5 are supplied with heat exchange medium by expansion tank 1.

[0036] When the engine temperature is low, the thermostat 3 is closed, and the coolant circulates according to circuit B, without flowing through the radiator 5; when the engine temperature rises to a certain range, the thermostat 3 is opened, and the coolant circulates according to circuit A, flows through the radiator 5 to cool down, and then enters the engine 2 after passing through the thermostat 3 and the radiator 5, thus cooling the engine.

[0037] For example Figure 1 As shown: In order to make reasonable use of the waste heat resources generated by the engine, the present invention incorporates a heat exchanger 19 into the engine cooling circuit. The input port of one side of the heat exchanger 19 is connected to the electronic valve 20, and the output port is connected to the electronic valve 28 on the power battery cooling circuit. The input and output ports on the other side of the heat exchanger 19 are respectively connected to the engine cooling circuit.

[0038] At the same time, the power battery heat dissipation circuit is also connected in parallel with the radiator. In a low temperature environment, when the power battery needs to be preheated, the electronic valve 20 and the electronic valve 28 are opened, the low temperature cooling liquid in the battery heat dissipation circuit flows to the heat exchanger 19, exchanges heat with the high temperature cooling liquid flowing out of the engine, and then returns to the battery heat dissipation circuit to circulate, so as to realize the preheating of the power battery.

[0039] As shown in Figure 3 , the power battery heat dissipation circuit is composed of the electronic water pump 3, the power battery 15, the power battery heat exchanger 16, the air conditioner 17 and the expansion valve 18.

[0040] The refrigerant side input and output port of the power battery heat exchanger 16 forms a circuit with the air conditioner 17 and the expansion valve 18, and the cooling liquid side input and output port of the power battery heat exchanger 16 forms a circuit with the electronic water pump 3 and the power battery 15.

[0041] When the temperature of the power battery 15 is too high (or too low), the electronic water pump 3 is started, the cooling liquid flows through the power battery 15, cools (heats) the battery, and then enters the heat exchanger to exchange heat with the refrigerant at the cold end (hot end), so that the cooling liquid is cooled and then reenters the circulation circuit. When the power battery has cooling (heating) demand, the air conditioner 17 works to cool (heat) the refrigerant and send it into the heat exchanger to exchange heat with the cooling liquid.

[0042] As shown in Figure 1 , in order to improve the heat dissipation capacity of the engine heat dissipation circuit and avoid the overheating of the engine in extreme harsh conditions, a heat exchanger 23 is incorporated into the engine heat dissipation circuit, and the air conditioner 17 for battery cooling is connected to the cold end circuit of the heat exchanger. One side of the heat exchanger 23 is connected in parallel with the engine heat dissipation circuit by adding an electronic valve 24, and the other side is connected in parallel with the cold end of the battery heat dissipation circuit by adding an electronic valve 21. The electronic valve 4 is connected to the pipeline of the air conditioner 17 and the expansion valve 18, and the heat exchange medium is provided by the expansion tank 1.

[0043] When the original engine heat dissipation circuit cannot meet the heat dissipation demand of the engine, the electronic valve 2 and the electronic valve 4 are opened, part of the engine cooling liquid flows through the heat exchanger 23 to dissipate heat and then returns to the engine; the air conditioner refrigerant is cooled by the air conditioner 17 and then flows into the heat exchanger 23 to exchange heat with the high temperature cooling liquid flowing out of the engine, thereby realizing the cooling of the engine.

[0044] As shown in Figure 4 , the motor heat dissipation circuit is composed of the expansion tank 2, the radiator 7, the electronic water pump 1, the motor 9, the motor controller 10, the electronic water pump 2, the all-in-one controller 12 and the charger 13.

[0045] In the circuit, the radiator 7, the electronic water pump 8, the motor 9 and the motor controller 10 form a circuit, the electronic water pump 11, the all-in-one controller 12 and the charger 13 are connected in the circuit of the motor 9, and the expansion water tank 6 provides the heat exchange medium.

[0046] When the temperature of the electronic components is high, the cooling liquid cooled by the radiator 7 enters the motor 9, the motor controller 10, the all-in-one controller 12 and the charger 13 through the electronic water pump 8 and the electronic water pump 11, and cools them, and then the cooling liquid returns to the radiator and discharges heat to the outside.

[0047] Since the motor cooling system has no heating function, in a low-temperature environment, the electronic components may not work normally due to low temperature. To avoid this problem, the motor cooling circuit and the battery preheating circuit are connected in parallel, that is, the heat exchanger 19 is used to transfer the heat generated by the engine to the motor cooling circuit. When the temperature is too low, the electronic valve 22, the electronic valve 25 and the electronic valve 27 are opened, the high-temperature cooling liquid in the engine circuit flows into the radiator 19 and exchanges heat with the low-temperature cooling liquid in the motor cooling circuit, and the heated motor cooling liquid returns to the electronic components such as the motor, thereby realizing preheating of the electronic components.

[0048] In addition, the scheme can also realize preheating of the engine. When the motor works, the temperature of the cooling liquid in the motor cooling circuit rises continuously, at this time, the temperature of the motor cooling liquid can be used to preheat the engine until the temperature of the engine cooling liquid approaches the optimal working temperature. As shown in the figure, when the motor works normally and the engine water temperature is low, the electronic valve 22, the electronic valve 25 and the electronic valve 27 are opened, the high-temperature cooling liquid flowing through the motor and other components enters the heat exchanger 19 and exchanges heat with the low-temperature engine cooling liquid therein, thereby realizing preheating of the engine when the engine temperature is low.

[0049] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope of the claims.

Claims

1. A synergic thermal management system for new energy construction machinery; characterized in that: The engine heat dissipation circuit, the power battery heat dissipation circuit, the motor heat dissipation circuit, the heat exchanger one (19), the heat exchanger two (23); One side of the heat exchanger two (23) is connected to the engine heat dissipation circuit, and the other side of the heat exchanger two (23) is connected to the air conditioning pipe of the power battery heat dissipation circuit; The heat exchanger one (19) is connected to the engine heat dissipation circuit through one side, and is connected to the power battery heat dissipation circuit through the other side; The motor heat dissipation circuit is connected to the heat exchanger one (19) in parallel.

2. The synergic thermal management system for new energy construction machinery according to claim 1; characterized in that: The input and output ends of one side of the heat exchanger one (19) are connected to the electronic valve one (20) and the electronic valve eight (28) of the power battery heat dissipation circuit respectively. The input and output ends of the other side of the heat exchanger one (19) are connected to the engine heat dissipation circuit.

3. The synergic thermal management system for new energy construction machinery according to claim 1; characterized in that: The heat exchanger two (23) is connected to the engine heat dissipation circuit, and the input end of one side of the heat exchanger two (23) is connected to the electronic valve four (24) in series.

4. The synergic thermal management system for new energy construction machinery according to claim 1 or 2; characterized in that: One side of the heat exchanger one (19) is an upper-in lower-out input and output interface or a lower-in upper-out input and output interface; The output end of the motor heat dissipation circuit is connected to the input and output interfaces of the heat exchanger one (19) connected to the power battery heat dissipation circuit through the electronic valve five (25) in series. The input and output ends of the motor heat dissipation circuit are connected to the input and output interfaces of the heat exchanger one (19) connected to the power battery heat dissipation circuit through the electronic valve seven (27) in series.

5. The synergic thermal management system for new energy construction machinery according to claim 1; characterized in that: The input and output ends of one side of the heat exchanger one (19) connected to the power battery heat dissipation circuit are connected to the electronic valve two (21) in series.

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