New energy battery thermal management heat dissipation system and agricultural equipment

Abstract

This invention provides a thermal management and heat dissipation system for new energy batteries and related agricultural machinery equipment, relating to the technical field of new energy battery heat dissipation. The new energy battery thermal management and heat dissipation system includes a motor control cooling circuit, an air conditioning cooling circuit, and a battery cooling circuit. The battery cooling circuit includes a battery module, a first heat exchanger, a battery water pump, a first three-way valve, and a first radiator. The battery module, through the battery water pump and the first three-way valve, forms a low-temperature heat dissipation circuit with the first radiator. The battery module, through the battery water pump, the first three-way valve, and the first heat exchanger, forms an air conditioning cooling circuit. The first three-way valve is used to control the switching between the low-temperature heat dissipation circuit and the air conditioning cooling circuit. The air conditioning cooling circuit includes a compressor, a second heat exchanger, an expansion valve, and the first heat exchanger connected in sequence. The second heat exchanger is connected to the motor control cooling circuit through a second three-way valve. This achieves the technical effect of improving heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of new energy battery heat dissipation technology, and more specifically, to a new energy battery thermal management and heat dissipation system and agricultural machinery equipment. Background Technology

[0002] At present, the cooling of the battery system of new energy tractors mainly relies on electric compressor cooling. When the electric compressor is cooling, it mainly dissipates heat through the condenser. However, new energy tractors, especially hybrid tractors, need to add an extra condenser system on top of the condenser in the cab, which makes the space layout more tight and increases the pressure of pipeline layout.

[0003] Moreover, the electric air conditioner compressor condenser shares a fan with other heat dissipation equipment, is fully coupled with the engine speed, the engine speed is uncontrollable, the refrigerant circuit has poor stability, and the air heat exchange efficiency is low.

[0004] Electric air conditioner compressors cannot operate in low-temperature environments below -10°C and therefore cannot provide cooling for the battery. Summary of the Invention

[0005] The purpose of this invention is to provide a new energy battery thermal management and heat dissipation system and agricultural machinery equipment to alleviate the technical problem of low heat dissipation efficiency in the prior art.

[0006] In a first aspect, embodiments of the present invention provide a thermal management and heat dissipation system for a new energy battery, including a motor control cooling circuit, an air conditioning cooling circuit, and a battery cooling circuit; The battery cooling circuit includes a battery module, a first heat exchanger, a battery water pump, a first three-way valve, and a first radiator. The battery module forms a low-temperature heat dissipation circuit with the first radiator through the battery water pump and the first three-way valve. The battery module forms an air conditioning cooling circuit through the battery water pump, the first three-way valve, and the first heat exchanger. The first three-way valve is used to control the switching between the low-temperature heat dissipation circuit and the air conditioning cooling circuit. The air conditioning cooling circuit includes a compressor, a second heat exchanger, an expansion valve, and a first heat exchanger connected in sequence. The second heat exchanger is connected to the motor control cooling circuit through a second three-way valve.

[0007] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein temperature sensors are provided at both the liquid inlet and liquid outlet of the battery module.

[0008] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein a liquid storage tank is provided in the air conditioning cooling circuit.

[0009] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein temperature and pressure sensors are provided at the refrigerant outlet and refrigerant inlet of the second heat exchanger. A temperature and pressure sensor is installed at the air intake of the compressor.

[0010] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein both the motor control cooling circuit and the battery cooling circuit are provided with a liquid replenishment tank.

[0011] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein both the first three-way valve and the second three-way valve are electronic three-way valves.

[0012] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the battery cooling circuit further includes a one-way valve, the one-way valve being disposed between the battery cooling circuit and the first radiator, and the one-way valve being open along the driving direction of the battery water pump.

[0013] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the battery cooling circuit further includes an electric heater, the electric heater being disposed between the battery module and the first heat exchanger.

[0014] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned motor electronic control cooling circuit includes a motor water pump, a motor controller, a second radiator, and a second three-way valve; The motor water pump, the motor controller, and the second radiator form a cooling circuit, and the second heat exchanger is connected to the motor control cooling circuit through the second three-way valve.

[0015] Secondly, embodiments of the present invention provide an agricultural machinery device, including the new energy battery thermal management and heat dissipation system.

[0016] Beneficial effects: This invention provides a thermal management and heat dissipation system for a new energy battery, including a motor control cooling circuit, an air conditioning cooling circuit, and a battery cooling circuit. The battery cooling circuit includes a battery module, a first heat exchanger, a battery water pump, a first three-way valve, and a first radiator. The battery module forms a low-temperature heat dissipation circuit with the first radiator through the battery water pump and the first three-way valve. The battery module also forms an air conditioning cooling circuit through the battery water pump, the first three-way valve, and the first heat exchanger. The first three-way valve is used to control the switching between the low-temperature heat dissipation circuit and the air conditioning cooling circuit. The air conditioning cooling circuit includes a compressor, a second heat exchanger, an expansion valve, and the first heat exchanger connected in sequence. The second heat exchanger is connected to the motor control cooling circuit through a second three-way valve.

[0017] Specifically, during operation, in high-temperature environments, the first three-way valve activates the air conditioning cooling circuit, allowing the battery module to be cooled through the first heat exchanger. The compressor also cools the first heat exchanger, thus cooling the battery module. Simultaneously, the second three-way valve activates the second heat exchanger and the motor / control cooling circuit, allowing the refrigerant to be cooled through the second heat exchanger. This eliminates the need for a separate condenser for the compressor, allowing it to share the second radiator with the motor / control cooling circuit. This completely decouples the compressor and engine speed in the air conditioning cooling circuit, using coolant to cool the refrigerant and improving heat dissipation efficiency and effectiveness. In low-temperature environments below -5℃, the first three-way valve activates the low-temperature heat dissipation circuit, allowing the battery module to be cooled through the first radiator. Cooling the battery module through the compressor is no longer necessary, solving the problem of the electric compressor being unable to operate and cool the battery in low-temperature environments.

[0018] This invention provides an agricultural machinery device, including a new energy battery thermal management and heat dissipation system. This agricultural machinery device has the advantages described above compared to existing technologies, which will not be elaborated further here. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the thermal management and heat dissipation system for new energy batteries provided in an embodiment of the present invention.

[0021] icon: 100 - Motor control cooling circuit; 110 - Second three-way valve; 120 - Motor water pump; 130 - Motor controller; 140 - Second radiator; 200 - Air conditioning cooling circuit; 210 - Compressor; 220 - Second heat exchanger; 230 - Expansion valve; 240 - Liquid receiver; 300-Battery cooling circuit; 310-Battery module; 320-First heat exchanger; 330-Battery water pump; 340-First three-way valve; 350-First radiator; 360-Low temperature heat dissipation circuit; 370-Air conditioning refrigeration cooling circuit; 380-One-way valve; 390-Electric heater; 400 - Temperature sensor; 500-Temperature and pressure sensor. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0027] See Figure 1 As shown, this embodiment provides a new energy battery thermal management and heat dissipation system, including a motor control cooling circuit 100, an air conditioning cooling circuit 200, and a battery cooling circuit 300. The battery cooling circuit 300 includes a battery module 310, a first heat exchanger 320, a battery water pump 330, a first three-way valve 340, and a first radiator 350. The battery module 310 forms a low-temperature heat dissipation circuit 360 with the first radiator 350 through the battery water pump 330 and the first three-way valve 340. The battery module 310 forms an air conditioning cooling circuit 370 with the battery water pump 330, the first three-way valve 340, and the first heat exchanger 320. The first three-way valve 340 is used to control the switching between the low-temperature heat dissipation circuit 360 and the air conditioning cooling circuit 370. The air conditioning cooling circuit 200 includes a compressor 210, a second heat exchanger 220, an expansion valve 230, and the first heat exchanger 320 connected in sequence. The second heat exchanger 220 is connected to the motor control cooling circuit 100 through a second three-way valve 110.

[0028] Specifically, during operation, in a high-temperature environment, the first three-way valve 340 connects the air conditioning cooling circuit 370, allowing the battery module 310 to be cooled through the first heat exchanger 320. The compressor 210 also cools the first heat exchanger 320, thus achieving cooling of the battery module 310. Furthermore, the second three-way valve 110 connects the second heat exchanger 220 and the motor control cooling circuit 100, allowing the refrigerant to be cooled through the second heat exchanger 220. Therefore, it is unnecessary to install a separate condenser for the compressor 210, allowing for operation with the electric motor. The electromechanical control cooling circuit 100 shares the second radiator 140, which completely decouples the compressor 210 of the air conditioning cooling circuit 200 from the engine speed, improving heat dissipation efficiency and effect. In low-temperature environments below -5℃, the first three-way valve 340 opens the low-temperature heat dissipation circuit 360, and the battery module 310 is cooled by the first radiator 350. It is not necessary to cool the battery module 310 through the compressor 210, thus solving the problem that the electric compressor cannot work in low-temperature environments and cannot cool the battery.

[0029] The air conditioning cooling circuit 200 is equipped with a liquid storage tank 240.

[0030] Temperature sensors 400 are installed at both the inlet and outlet of the battery module 310.

[0031] Temperature and pressure sensors 500 are installed at the refrigerant outlet and refrigerant inlet of the second heat exchanger 220 and at the suction port of the electric compressor (210).

[0032] Both the motor and electronic control cooling circuit 100 and the battery cooling circuit 300 are equipped with a water reservoir.

[0033] Both the first three-way valve 340 and the second three-way valve 110 are electronic three-way valves.

[0034] The battery cooling circuit 300 also includes a one-way valve 380, which is disposed between the battery cooling circuit 300 and the first radiator 350. The one-way valve 380 is open along the driving direction of the battery water pump 330.

[0035] It should be noted that the second heat exchanger 220 can be a WCDC plate heat exchanger. By replacing the condenser with the second heat exchanger 220, the coolant of the electronically controlled cooling circuit can dissipate heat from the high-temperature and high-pressure gas of the refrigerant in the air conditioning cooling circuit 200, resulting in higher heat exchange efficiency.

[0036] In addition, in low-temperature environments below -5℃, the battery cooling circuit 300 utilizes the low-temperature heat dissipation circuit 360 for cooling and heat dissipation, meeting the heat dissipation requirements of the battery operating in low-temperature environments. The coolant of the motor control cooling circuit 100 is used to dissipate heat from the refrigerant in the air conditioning cooling circuit 200, so that the refrigerant of the compressor 210 is completely decoupled from the engine speed. Furthermore, the opening of the second three-way valve 110 can be adjusted according to the refrigerant inlet and outlet temperatures of the second heat exchanger 220, thereby ensuring refrigerant subcooling and enabling the compressor 210 to operate normally in a low-temperature environment of -5℃.

[0037] It should also be noted that by setting the second heat exchanger 220, the motor control cooling circuit 100 and the air conditioning cooling circuit 200 can be integrated into a thermal management unit, reducing space occupation, piping layout, weight and cost. In addition, the compressor 210 has good oil return effect in a low temperature environment of -5℃.

[0038] In an optional embodiment, the motor control cooling circuit 100 includes a motor water pump 120, a motor controller 130, a second radiator 140, and a second three-way valve 110; the motor water pump 120, the motor controller 130, and the second radiator 140 form a cooling circuit, and the second heat exchanger 220 is connected to the motor control cooling circuit 100 through the second three-way valve 110.

[0039] In an optional embodiment, the battery cooling circuit 300 further includes an electric heater 390, which is disposed between the battery module 310 and the first heat exchanger 320.

[0040] Specifically, in a low-temperature environment, the electric heater 390 can be used to heat the coolant in the battery cooling circuit 300, thereby heating the battery module 310.

[0041] This embodiment provides an agricultural machinery device, including a new energy battery thermal management and heat dissipation system.

[0042] Specifically, the agricultural machinery provided in this embodiment has the advantages of the above-mentioned new energy battery thermal management and heat dissipation system compared with the prior art, which will not be elaborated here.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal management and heat dissipation system for new energy batteries, characterized in that, include: Motor control cooling circuit (100), air conditioning cooling circuit (200) and battery cooling circuit (300). The battery cooling circuit (300) includes a battery module (310), a first heat exchanger (320), a battery water pump (330), a first three-way valve (340), and a first radiator (350). The battery module (310) forms a low-temperature heat dissipation circuit (360) with the first radiator (350) through the battery water pump (330) and the first three-way valve (340). The battery module (310) forms an air conditioning cooling circuit (370) through the battery water pump (330), the first three-way valve (340), and the first heat exchanger (320). The first three-way valve (340) is used to control the switching between the low-temperature heat dissipation circuit (360) and the air conditioning cooling circuit (370). The air conditioning cooling circuit (200) includes a compressor (210), a second heat exchanger (220), an expansion valve (230) and a first heat exchanger (320) connected in sequence. The second heat exchanger (220) is connected to the motor control cooling circuit (100) through a second three-way valve (110).

2. The new energy battery thermal management and heat dissipation system according to claim 1, characterized in that, Temperature sensors (400) are installed at both the inlet and outlet of the battery module (310).

3. The new energy battery thermal management and heat dissipation system according to claim 1, characterized in that, A liquid storage tank (240) is installed in the air conditioning cooling circuit (200).

4. The new energy battery thermal management and heat dissipation system according to claim 1, characterized in that, Temperature and pressure sensors (500) are installed at the refrigerant outlet and refrigerant inlet of the second heat exchanger (220). A temperature and pressure sensor (500) is installed at the air intake of the compressor (210).

5. The new energy battery thermal management and heat dissipation system according to claim 1, characterized in that, Both the motor control cooling circuit (100) and the battery cooling circuit (300) are equipped with a water reservoir.

6. The new energy battery thermal management and heat dissipation system according to claim 1, characterized in that, Both the first three-way valve (340) and the second three-way valve (110) are electronic three-way valves.

7. The new energy battery thermal management and heat dissipation system according to any one of claims 1-6, characterized in that, The battery cooling circuit (300) further includes a one-way valve (380), which is disposed between the battery cooling circuit (300) and the first radiator (350), and the one-way valve (380) is open along the driving direction of the battery water pump (330).

8. The new energy battery thermal management and heat dissipation system according to any one of claims 1-6, characterized in that, The battery cooling circuit (300) further includes an electric heater (390) disposed between the battery module (310) and the first heat exchanger (320).

9. The new energy battery thermal management and heat dissipation system according to any one of claims 1-6, characterized in that, The motor control cooling circuit (100) includes a motor water pump (120), a motor controller (130), a second radiator (140), and a second three-way valve (110). The motor water pump (120), the motor controller (130) and the second radiator (140) form a cooling circuit, and the second heat exchanger (220) is connected to the motor control cooling circuit (100) through the second three-way valve (110).

10. An agricultural machinery device, characterized in that, The new energy battery thermal management and heat dissipation system includes any one of claims 1-9.

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