WO2024082148A1

WO2024082148A1 - Temperature control system and power apparatus

Info

Publication number: WO2024082148A1
Application number: PCT/CN2022/126014
Authority: WO
Inventors: 吴凯; 庄朝晖
Original assignee: 宁德时代新能源科技股份有限公司; 宁德时代(上海)智能科技有限公司
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2024-04-25
Also published as: CN117015923A

Abstract

A temperature control system, comprising a storage component (10), a heat exchanger (11), a temperature control valve (12), a first pipeline (13) and a second pipeline (14), wherein the storage component (10) is used for accommodating a heat exchange medium; the heat exchanger (11) is used for cooling the heat exchange medium, and the heat exchanger (11) is provided with a heat exchange inlet (111) and a heat exchange outlet (112), which are in communication with each other; the temperature control valve (12) comprises a medium inlet (121), a first medium outlet (122) and a second medium outlet (123), the medium inlet (121) being in communication with the storage component (10), and the first medium outlet (122) being in communication with the heat exchange inlet (111); the first pipeline (13) is in communication with the heat exchange outlet (112) and the second medium outlet (123), and is used for conveying the heat exchange medium to a power assembly (2); and the second pipeline (14) is used for connecting the power assembly (2) and the storage component (10). The temperature control system can control the temperature of the power assembly (2) in a precise manner. Further provided is a power apparatus having the temperature control system.

Description

Temperature control system and power unit

Technical Field

The present application relates to the field of power technology, and more specifically, to a temperature control system and a power device.

Background technique

With the continuous upgrading of automobile market technology and the pressure of environmental pollution, fuel consumption, emission regulations and policies, the development of energy-saving and clean energy technology has become a consensus in the automobile industry. In the past two years, the pure electric and hybrid vehicle products on the market have been continuously enriched and the technology has been further developed.

The temperature of the powertrain of a car has an important impact on the working efficiency of the powertrain. Therefore, a temperature control system is usually required to adjust the working temperature of the powertrain. How to improve the temperature control efficiency of the powertrain is an important research direction.

Summary of the invention

The present application provides a temperature control system and a power device, which can improve temperature control efficiency and reduce losses.

In a first aspect, an embodiment of the present application provides a temperature control system, including a storage component, a heat exchanger, a temperature control valve, a first pipeline, and a second pipeline. The storage component is used to accommodate a heat exchange medium. The heat exchanger is used to cool the heat exchange medium, and the heat exchanger has a heat exchange inlet and a heat exchange outlet that are connected. The temperature control valve includes a medium inlet, a first medium outlet, and a second medium outlet, the medium inlet is connected to the storage component, and the first medium outlet is connected to the heat exchange inlet. The first pipeline is connected to the heat exchange outlet and the second medium outlet and is used to transport the heat exchange medium to the powertrain. The second pipeline is used to connect the powertrain and the storage component.

When the temperature is lower than the first threshold, the temperature control valve isolates the first medium outlet and the medium inlet, and connects the second medium outlet and the medium inlet, that is, the temperature control valve bypasses the heat exchanger, and the heat exchange medium will not enter the heat exchanger to participate in heat exchange and temperature reduction. The heat exchange medium in the temperature control valve flows into the powertrain through the second medium outlet and the first pipeline. After absorbing the heat generated by the powertrain, the heat exchange medium quickly heats up, thereby reducing the flow resistance in the temperature control system and improving the heat exchange efficiency. When the temperature is higher than the second threshold (the second threshold is greater than or equal to the first threshold), the temperature control valve isolates the second medium outlet and the medium inlet, and connects the first medium outlet and the medium inlet; the heat exchange medium flows into the heat exchanger to cool down, and the cooled heat exchange medium flows into the powertrain through the first pipeline. The heat exchange medium absorbs the heat generated by the powertrain to cool down the powertrain and improve the performance of the powertrain.

In some embodiments, the temperature control system further includes a driving component, which is used to drive the heat exchange medium to flow and is disposed between the storage component and the temperature control valve.

The drive component can be used to provide power for the circulation of the heat exchange medium. By placing the drive component between the storage component and the temperature control valve, the pressure of the heat exchange medium entering the temperature control valve can be increased. By setting the temperature control valve, the viscosity of the heat exchange medium under low temperature conditions can be reduced, the load of the drive component can be reduced, and the working efficiency of the drive component can be improved.

In some embodiments, the temperature control system further includes a controller and a first sensor, the first sensor is disposed between the storage component and the temperature control valve and is used to detect the temperature of the heat exchange medium, and the controller is at least used to receive the temperature signal detected by the first sensor and to feedback control the driving component.

The controller can obtain the temperature signal of the heat exchange medium in real time through the first sensor, and then feedback control the power output by the driving component according to the system heat exchange flow and system flow resistance requirements to improve the heat exchange efficiency.

In some embodiments, the powertrain includes a motor and a reducer. The first pipeline includes a manifold, a first branch pipe, and a second branch pipe, and the manifold is connected to a heat exchange outlet and a second medium outlet. The first branch pipe is connected to the manifold and is used to transport the heat exchange medium to the motor, and the second branch pipe is connected to the manifold and is used to transport the heat exchange medium to the reducer.

When the temperature is lower than the first threshold, the temperature control valve isolates the first medium outlet and the medium inlet, and connects the second medium outlet and the medium inlet, that is, the temperature control valve bypasses the heat exchanger, and the heat exchange medium will not enter the heat exchanger to participate in heat exchange and temperature reduction. The heat exchange medium in the temperature control valve flows into the motor and the reducer through the second medium outlet and the first pipeline; under the dual effects of the rapid stirring of the gear of the reducer and the heating of the motor, the heat exchange medium heats up rapidly, which can reduce the low-temperature stirring loss of the gear and improve the working efficiency of the reducer. When the temperature is higher than the second threshold, the temperature control valve isolates the second medium outlet and the medium inlet, and connects the first medium outlet and the medium inlet; the heat exchange medium flows into the heat exchanger to cool down, and the cooled heat exchange medium flows into the motor and the reducer through the first pipeline, thereby playing a role in heat dissipation and lubrication, and improving the performance of the motor and the reducer. The heat exchange medium in the manifold can be divided through the first branch pipe and the second branch pipe to cool the motor and the reducer respectively.

In some embodiments, the temperature control system further includes a controller and a second sensor, the second sensor is used to detect the temperature of the motor, and the controller is at least used to receive the temperature signal detected by the second sensor and adjust the flow rate of the heat exchange medium.

The controller can obtain the temperature signal of the motor in real time through the second sensor, and then feedback control the flow rate of the heat exchange medium according to the system heat exchange flow and system flow resistance requirements, so as to reduce energy consumption while meeting the motor temperature requirements.

In some embodiments, the temperature control system further includes a filtering mechanism, wherein the filtering mechanism is connected to the medium inlet and the storage component.

The filter mechanism can filter out impurities in the heat exchange medium, improve the cleanliness of the heat exchange medium, and reduce the risk of damage to the heat exchanger and powertrain. The temperature control valve is set between the filter mechanism and the heat exchanger. Under low temperature conditions, the temperature control valve only bypasses the heat exchanger. The filter mechanism in the temperature control system can still filter impurities in the heat exchange medium normally, which is beneficial to improve the insulation reliability of the high-voltage motor.

In some embodiments, the filter mechanism includes a first filter and a second filter, the first filter is connected to the storage component, the second filter is connected to the first filter and the medium inlet, and the filtering accuracy of the second filter is higher than that of the first filter.

The first filter and the second filter can perform secondary filtration on the heat exchange medium, thereby improving the cleanliness of the oil and reducing the risk of damage to the heat exchanger and the powertrain.

In some embodiments, the temperature control valve includes a shell, a core and an elastic member. The shell is provided with a second medium outlet, a medium inlet and a first medium outlet arranged in sequence along the arrangement direction. The core is accommodated in the shell, and the core is configured to expand when heated. The elastic member is arranged along the arrangement direction with the core and abuts against the core, an end of the elastic member away from the core abuts against the shell, and an end of the core away from the elastic member abuts against the shell.

When the temperature is lower than the first threshold value, the core moves to the side of the medium inlet close to the first medium outlet under the action of the elastic force of the elastic member, and the core isolates the first medium outlet from the medium inlet and connects the second medium outlet to the medium inlet. At this time, the heat exchanger is bypassed. The heat exchange medium in the temperature control valve flows into the powertrain through the second medium outlet and the first pipeline. The heat exchange medium quickly heats up after absorbing the heat generated by the powertrain, thereby reducing the flow resistance in the temperature control system and improving the heat exchange efficiency. Under the action of the powertrain, when the temperature of the heat exchange medium rises and exceeds the first threshold value, the core expands due to heat and gradually moves toward the second medium outlet. When the temperature of the heat exchange medium exceeds the second threshold value, the core isolates the second medium outlet from the medium inlet and connects the first medium outlet to the medium inlet. The heat exchange medium flows into the heat exchanger to cool down, and the cooled heat exchange medium flows into the powertrain through the first pipeline. The heat exchange medium absorbs the heat generated by the powertrain to cool down the powertrain and improve the performance of the powertrain.

In some embodiments, the heat exchange medium includes insulating oil. Insulating oil has high heat exchange efficiency and can reduce the risk of short circuit.

In a second aspect, an embodiment of the present application provides a power device, including a power assembly and a temperature control system provided by any embodiment of the first aspect, wherein a first pipeline and a second pipeline of the temperature control system are connected to the power assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

FIG2 is a schematic diagram of a temperature control system in one state provided by some embodiments of the present application;

FIG3 is a schematic diagram of the temperature control system shown in FIG2 in another state;

FIG. 4 is a schematic diagram of a temperature control system provided in some other embodiments of the present application.

In the drawings, the drawings are not drawn to scale.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 are within the scope of protection of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

Reference to "embodiment" in this application means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The term "and/or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

The term "plurality" used in the present application refers to two or more (including two).

At present, the powertrain of a car generates heat during operation, and the accumulated heat will cause the powertrain to heat up. Effective cooling of the powertrain is related to the improvement of the powertrain's continuous power density and the extension of the peak power duration, thereby improving the vehicle's power performance, or reducing the powertrain cost under the premise that the vehicle's power performance requirements remain unchanged.

The inventor has designed a temperature control system which utilizes the circulation of a heat exchange medium between a power assembly and a heat exchanger to cool the power assembly.

However, the inventors noticed that the actual operating temperature range of the powertrain is relatively wide, and the ultimate efficiency is pursued. When the heat exchange medium flows under low temperature conditions, the viscosity of the heat exchange medium is large, which increases the flow resistance of the heat exchanger, thereby increasing the flow resistance and load of the entire temperature control system and reducing the heat exchange efficiency. In addition, since the heat exchange medium needs to pass through the heat exchanger, it is not conducive to the rapid heating of the low-temperature heat exchange medium.

In view of this, the embodiment of the present application provides a technical solution, which switches the flow path of the heat exchange medium according to system requirements by setting a temperature control valve, thereby improving the heat exchange efficiency. Specifically, under low temperature conditions, the temperature control valve can bypass the heat exchanger so that the heat exchange medium can flow through the powertrain without passing through the heat exchanger; the heat exchange medium can quickly heat up under the action of heat generated by the powertrain, thereby reducing flow resistance, improving heat exchange efficiency, and improving the working performance of the powertrain.

The technical solution described in the embodiments of the present application is applicable to a power device using a temperature control system.

The power device may be a vehicle, a ship, a spacecraft, etc. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned power devices.

For the convenience of description, the following embodiments are described by taking a vehicle as an example of a power device.

FIG1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application.

As shown in FIG. 1 , a power assembly 2 and a temperature control system 3 are provided inside a vehicle 1 . The temperature control system 3 is used to adjust the temperature of the power assembly 2 .

In some embodiments, the powertrain 2 includes a motor and a reducer, and the motor and the reducer are transmission-connected. For example, the drive shaft of the motor and the input shaft of the reducer can be transmission-connected through a transmission member such as a coupling to output the driving force from the motor to the reducer.

In some embodiments, a battery 4 is provided inside the vehicle 1 , and the battery 4 can provide electrical energy to the motor and other devices of the vehicle 1 .

FIG2 is a schematic diagram of a temperature control system provided in some embodiments of the present application in one state, and FIG3 is a schematic diagram of the temperature control system shown in FIG2 in another state.

As shown in FIGS. 2 and 3 , an embodiment of the present application provides a temperature control system 3, which includes a storage component 10, a heat exchanger 11, a temperature control valve 12, a first pipeline 13, and a second pipeline 14. The storage component 10 is used to accommodate a heat exchange medium. The heat exchanger 11 is used to cool the heat exchange medium, and the heat exchanger 11 has a heat exchange inlet 111 and a heat exchange outlet 112 that are connected. The temperature control valve 12 includes a medium inlet 121, a first medium outlet 122, and a second medium outlet 123. The medium inlet 121 is connected to the storage component 10, and the first medium outlet 122 is connected to the heat exchange inlet 111. The first pipeline 13 is connected to the heat exchange outlet 112 and the second medium outlet 123 and is used to transport the heat exchange medium to the power assembly 2. The second pipeline 14 is used to connect the power assembly 2 and the storage component 10.

The storage component 10 has a receiving cavity, and the receiving cavity can be used to receive the heat exchange medium. The embodiment of the present application does not limit the number of the storage components 10, and the storage components 10 can be one or more.

The present application does not limit the type of heat exchange medium. For example, the heat exchange medium may be oil.

The heat exchange medium can enter the heat exchanger 11 through the heat exchange inlet 111 and be cooled in the heat exchanger 11 ; the cooled heat exchange medium flows out of the heat exchanger 11 through the heat exchange outlet 112 .

The temperature control valve 12 can switch the passage according to the temperature of the heat exchange medium. When the heat exchange medium enters the temperature control valve 12 through the medium inlet 121, the temperature control valve 12 can switch the on-off state of the first medium outlet 122 and the medium inlet 121 and the on-off state of the second medium outlet 123 and the medium inlet 121 according to the temperature of the heat exchange medium.

The operating temperature range of the temperature control valve 12 can be defined based on the system cooling requirements. Exemplarily, the operating temperature range of the temperature control valve 12 is T1-T2; when the temperature of the heat exchange medium flowing into the temperature control valve 12 is less than T1, the temperature control valve 12 isolates the first medium outlet 122 and the medium inlet 121, and connects the second medium outlet 123 and the medium inlet 121; when the temperature of the heat exchange medium flowing into the temperature control valve 12 is greater than T2, the temperature control valve 12 isolates the second medium outlet 123 and the medium inlet 121, and connects the first medium outlet 122 and the medium inlet 121; when the temperature of the heat exchange medium flowing into the temperature control valve 12 is T1-T2, the first medium outlet 122 and the second medium outlet 123 can be connected to the medium inlet 121 at the same time.

The medium inlet 121 may be directly connected to the storage component 10 or may be connected to the storage component 10 through other pipelines. For example, other components may also be arranged on the pipeline connecting the medium inlet 121 and the storage component 10.

The heat exchange medium flowing out through the second medium outlet 123 can flow into the first pipeline 13 without passing through the heat exchanger 11. The first pipeline 13 transports the heat exchange medium to the power assembly 2 to absorb the heat generated by the power assembly 2.

The second pipeline 14 is used to transport the heat exchange medium flowing through the power assembly 2 to the storage component 10, thereby forming a circulation loop of the heat exchange medium.

In the embodiment of the present application, when the temperature is lower than the first threshold value (for example, T1), the temperature control valve 12 isolates the first medium outlet 122 and the medium inlet 121, and connects the second medium outlet 123 and the medium inlet 121, that is, the temperature control valve 12 bypasses the heat exchanger 11, and the heat exchange medium does not enter the heat exchanger 11 to participate in heat exchange and temperature reduction. The heat exchange medium in the temperature control valve 12 flows into the power assembly 2 through the second medium outlet 123 and the first pipeline 13. After absorbing the heat generated by the power assembly 2, the heat exchange medium quickly heats up, thereby reducing the flow resistance in the temperature control system 3 and improving the heat exchange efficiency. When the temperature is higher than the second threshold value (the second threshold value is greater than or equal to the first threshold value, for example, the second threshold value is T2), the temperature control valve 12 isolates the second medium outlet 123 and the medium inlet 121 and connects the first medium outlet 122 and the medium inlet 121; the heat exchange medium flows into the heat exchanger 11 to cool down, and the cooled heat exchange medium flows into the power assembly 2 through the first pipeline 13, and the heat exchange medium absorbs the heat generated by the power assembly 2 to cool down the power assembly 2 and improve the performance of the power assembly 2.

In some embodiments, the temperature control system 3 further includes a driving component 15 , which is used to drive the heat exchange medium to flow and is disposed between the storage component 10 and the temperature control valve 12 .

In this embodiment, the drive component 15 is disposed between the storage component 10 and the temperature control valve 12, which means that the drive component 15 is located between the storage component 10 and the temperature control valve 12 on the flow path of the heat exchange medium. In three-dimensional space, the position of the drive component 15 is not required to be located between the storage component 10 and the temperature control valve 12.

Along the flow direction of the heat exchange medium, the driving component 15 is arranged downstream of the storage component 10 and upstream of the temperature control valve 12 .

In the embodiment of the present application, the driving component 15 can be used to provide power for the circulation of the heat exchange medium. The driving component 15 is arranged between the storage component 10 and the temperature control valve 12, which can increase the pressure of the heat exchange medium entering the temperature control valve 12. By setting the temperature control valve 12, the viscosity of the heat exchange medium under low temperature conditions can be reduced, the load of the driving component 15 can be reduced, and the working efficiency of the driving component 15 can be improved.

In some embodiments, the driving component 15 includes a pump. For example, the driving component 15 includes an electric pump. The embodiment of the present application can reduce the viscosity of the heat exchange medium under low temperature conditions, reduce the load of the electric pump, and improve the working efficiency of the electric pump.

In some embodiments, the temperature control system 3 also includes a controller 16 and a first sensor 17. The first sensor 17 is arranged between the storage component 10 and the temperature control valve 12 and is used to detect the temperature of the heat exchange medium. The controller 16 is at least used to receive the temperature signal detected by the first sensor 17 and feedback control the driving component 15.

The controller 16 can obtain the temperature signal of the heat exchange medium in real time through the first sensor 17, and then feedback control the power output by the driving component 15 (for example, controlling the speed of the electric pump) according to the system heat exchange flow and system flow resistance requirements to improve the heat exchange efficiency.

Exemplarily, the first sensor 17 is signal-connected to the controller 16 .

Exemplarily, the controller 16 may be a PEU controller. PEU is a power electronic integrated module for new energy vehicles and is one of the most important components that distinguish new energy vehicles from traditional fuel vehicles. PEU integrates components such as MCU (motor control unit), DC-DC converter, OBC (on-board charger), and PTC (on-board heater).

In some embodiments, the powertrain 2 includes a motor 21 and a reducer 22. Exemplarily, the motor 21 and the reducer 22 are in transmission connection.

When the temperature is lower than the first threshold, the temperature control valve 12 isolates the first medium outlet 122 from the medium inlet 121 and connects the second medium outlet 123 to the medium inlet 121, that is, the temperature control valve 12 bypasses the heat exchanger 11, and the heat exchange medium does not enter the heat exchanger 11 to participate in heat exchange and temperature reduction. The heat exchange medium in the temperature control valve 12 flows into the motor 21 and the reducer 22 through the second medium outlet 123 and the first pipeline 13; under the dual effects of the rapid stirring of the gears of the reducer 22 and the heating of the motor 21, the heat exchange medium heats up rapidly, which can reduce the low-temperature stirring loss of the gears and improve the working efficiency of the reducer 22.

When the temperature is higher than the second threshold value, the temperature control valve 12 isolates the second medium outlet 123 and the medium inlet 121 and connects the first medium outlet 122 and the medium inlet 121; the heat exchange medium flows into the heat exchanger 11 for cooling, and the cooled heat exchange medium flows into the motor 21 and the reducer 22 through the first pipeline 13, thereby playing a role in heat dissipation and lubrication, and improving the performance of the motor 21 and the reducer 22.

In some embodiments, the first pipeline 13 includes a manifold 131, a first branch pipe 132, and a second branch pipe 133. The manifold 131 is connected to the heat exchange outlet 112 and the second medium outlet 123. The first branch pipe 132 is connected to the manifold 131 and is used to transport the heat exchange medium to the motor 21, and the second branch pipe 133 is connected to the manifold 131 and is used to transport the heat exchange medium to the reducer 22.

There may be one or more first branch pipes 132. There may be one or more second branch pipes 133.

The heat exchange medium in the confluence pipe 131 can be divided through the first branch pipe 132 and the second branch pipe 133 to cool the motor 21 and the reducer 22 respectively.

In some embodiments, the temperature control system 3 further includes a controller 16 and a second sensor 18, the second sensor 18 is used to detect the temperature of the motor 21, and the controller 16 is at least used to receive the temperature signal detected by the second sensor 18 and adjust the flow rate of the heat exchange medium.

The controller 16 can obtain the temperature signal of the motor 21 in real time through the second sensor 18, and then feedback control the flow rate of the heat exchange medium according to the system heat exchange flow and system flow resistance requirements, so as to reduce energy consumption while meeting the temperature requirements of the motor 21.

Exemplarily, the second sensor 18 is signal-connected to the controller 16 .

For example, the controller 16 may adjust the flow rate of the heat exchange medium by controlling the rotation speed of the electric pump.

In some embodiments, the temperature control system 3 further includes a filtering mechanism 19 , which connects the medium inlet 121 and the storage component 10 .

The filter mechanism 19 can filter out impurities in the heat exchange medium, improve the cleanliness of the heat exchange medium, and reduce the risk of damage to the heat exchanger 11 and the power assembly 2. Exemplarily, by providing the filter mechanism 19, it is beneficial to improve the insulation reliability of the high-voltage motor 21.

The temperature control valve 12 is arranged between the filter mechanism 19 and the heat exchanger 11. Under low temperature conditions, the temperature control valve 12 only bypasses the heat exchanger 11. The filter mechanism 19 in the temperature control system 3 can still filter impurities in the heat exchange medium normally, which is beneficial to improving the insulation reliability of the high-voltage motor 21.

In some embodiments, the filter mechanism 19 includes a first filter 191 and a second filter 192. The first filter 191 is connected to the storage component 10, and the second filter 192 is connected to the first filter 191 and the medium inlet 121. The filtering accuracy of the second filter 192 is higher than that of the first filter 191.

The filtration accuracy can be determined according to the maximum size of particles passing through the filter. The filtration accuracy of the second filter 192 is higher than that of the first filter 191, which means that the maximum size of particles that can pass through the second filter 192 is smaller than the maximum size of particles that can pass through the first filter 191.

Exemplarily, the first filter 191 may be a coarse filter, and the second filter 192 may be a fine filter.

The first filter 191 can filter out particles with larger particle sizes, and the second filter 192 can filter out particles with smaller particle sizes.

In the embodiment of the present application, the first filter 191 and the second filter 192 can perform secondary filtration on the heat exchange medium, thereby improving the cleanliness of the oil and reducing the risk of damage to the heat exchanger 11 and the powertrain 2.

In some embodiments, the driving component 15 is disposed between the first filter 191 and the second filter 192 .

The first filter 191 can filter out particles with larger particle sizes, reduce the number of particles that enter the gear rotor of the electric pump running at high speed, reduce the risk of damage to the gear rotor, and extend the service life of the electric pump.

The refined filtration of the second filter 192 can further reduce the impurity particles, especially the metal impurity particles, in the heat exchange medium, improve the cleanliness of the oil, and be beneficial to the insulation reliability of the high-voltage motor 21.

Exemplarily, in FIGS. 2 and 3 , the storage component 10 corresponding to the motor 21 , the storage component 10 corresponding to the reducer 22 , and the storage component 10 corresponding to the first filter 191 may be the same storage component 10 .

In some embodiments, the first sensor 17 may be installed between the storage component 10 and the first filter 191 to measure the temperature of the heat exchange medium before flowing into the first filter 191. In other embodiments, the first sensor 17 may be integrated inside the driving component 15 to measure the temperature of the heat exchange medium inside the driving component 15. In still other embodiments, the first sensor 17 may be installed between the second filter 192 and the heat exchange inlet 111 to measure the temperature of the heat exchange medium before flowing into the heat exchanger 11.

In some embodiments, the temperature control valve 12 includes a housing 12a, a core 12b and an elastic member 12c. The housing 12a is provided with a second medium outlet 123, a medium inlet 121 and a first medium outlet 122 arranged in sequence along the arrangement direction. The core 12b is accommodated in the housing 12a, and the core 12b is configured to expand when heated. The elastic member 12c is arranged along the arrangement direction with the core 12b and abuts against the core 12b, and one end of the elastic member 12c away from the core 12b abuts against the housing 12a, and one end of the core 12b away from the elastic member 12c abuts against the housing 12a.

As shown in FIG2 , when the temperature is lower than the first threshold value, the core 12b moves to the side of the medium inlet 121 close to the first medium outlet 122 (the core 12b is on the right side of the medium inlet 121) under the elastic force of the elastic member 12c, and the core 12b isolates the first medium outlet 122 from the medium inlet 121 and connects the second medium outlet 123 to the medium inlet 121. At this time, the heat exchanger 11 is bypassed. The heat exchange medium in the temperature control valve 12 flows into the power assembly 2 via the second medium outlet 123 and the first pipeline 13. After absorbing the heat generated by the power assembly 2, the heat exchange medium quickly heats up, thereby reducing the flow resistance in the temperature control system 3 and improving the heat exchange efficiency.

Under the action of the power assembly 2 (for example, under the rapid stirring of the gears of the reducer 22 and the heating of the motor 21 ), when the temperature of the heat exchange medium increases and exceeds the first threshold, the core 12b expands due to the heat and gradually moves toward the second medium outlet 123 .

As shown in FIG3 , when the temperature of the heat exchange medium exceeds the second threshold value, the core 12b isolates the second medium outlet 123 from the medium inlet 121 and connects the first medium outlet 122 to the medium inlet 121. The heat exchange medium flows into the heat exchanger 11 to cool down, and the cooled heat exchange medium flows into the power assembly 2 through the first pipeline 13. The heat exchange medium absorbs the heat generated by the power assembly 2 to cool down the power assembly 2 and improve the performance of the power assembly 2.

In some embodiments, core 12b comprises a paraffin core.

In some embodiments, the elastic member 12c includes a compression spring.

Exemplarily, the heat exchange medium includes gear oil.

In some embodiments, the heat exchanger 11 further includes a cooling liquid inlet 113 and a cooling liquid outlet 114 , and the cooling liquid can flow through the heat exchanger 11 via the cooling liquid inlet 113 and the cooling liquid outlet 114 to exchange heat with the heat exchange medium and cool the heat exchange medium.

As shown in Fig. 4, in some embodiments, the filtering mechanism 19 may include only one filter. On the premise that the cleanliness of the filtered heat exchange medium meets the requirements, providing one filter can simplify the structure of the temperature control system 3.

According to some embodiments of the present application, the present application further provides a power device, including a power assembly 2 and a temperature control system 3 of any of the above embodiments. The first pipeline 13 and the second pipeline 14 of the temperature control system 3 are connected to the power assembly 2.

2 and 3 , according to some embodiments of the present application, a temperature control system 3 is provided, which includes a storage component 10 , a first filter 191 , a driving component 15 , a second filter 192 , a temperature control valve 12 , a heat exchanger 11 , a first pipeline 13 and a second pipeline 14 .

The storage component 10 is used to accommodate a heat exchange medium. The heat exchanger 11 is used to cool the heat exchange medium. The heat exchanger 11 has a heat exchange inlet 111 and a heat exchange outlet 112 that are connected. The temperature control valve 12 includes a medium inlet 121, a first medium outlet 122, and a second medium outlet 123.

The first filter 191 is connected to the storage component 10, the second filter 192 is connected to the medium inlet 121, and the driving component 15 is located between the first filter 191 and the second filter 192. The filtering accuracy of the second filter 192 is higher than that of the first filter 191.

The first medium outlet 122 is connected to the heat exchange inlet 111. The first pipeline 13 includes a manifold 131, a first branch pipe 132, and a second branch pipe 133. The manifold 131 is connected to the heat exchange outlet 112 and the second medium outlet 123. The first branch pipe 132 is connected to the manifold 131 and is used to transport the heat exchange medium to the motor 21. The second branch pipe 133 is connected to the manifold 131 and is used to transport the heat exchange medium to the reducer 22.

The second pipeline 14 is used to connect the motor 21 and the reducer 22 to the storage component 10 , so that the heat exchange medium passing through the motor 21 and the reducer 22 flows into the storage component 10 .

The temperature control system 3 further includes a controller 16, a first sensor 17 and a second sensor 18. The first sensor 17 is disposed between the storage component 10 and the first filter 191 and is used to detect the temperature of the heat exchange medium. The second sensor 18 is used to detect the temperature of the motor 21. The controller 16 is used to receive the temperature signal detected by the first sensor 17 and the temperature signal detected by the second sensor 18 to feedback control the driving component 15.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A temperature control system, comprising:

A storage component, used for accommodating a heat exchange medium;

A heat exchanger, used to cool the heat exchange medium, the heat exchanger having a heat exchange inlet and a heat exchange outlet connected to each other;

A temperature control valve, comprising a medium inlet, a first medium outlet and a second medium outlet, wherein the medium inlet is connected to the storage component, and the first medium outlet is connected to the heat exchange inlet;

a first pipeline connected to the heat exchange outlet and the second medium outlet and used for conveying the heat exchange medium to the power assembly; and

The second pipeline is used to connect the power assembly and the storage component.
The temperature control system according to claim 1, further comprising a driving component for driving the heat exchange medium to flow and disposed between the storage component and the temperature control valve.
The temperature control system according to claim 2 further includes a controller and a first sensor, wherein the first sensor is arranged between the storage component and the temperature control valve and is used to detect the temperature of the heat exchange medium, and the controller is at least used to receive the temperature signal detected by the first sensor and feedback control the driving component.
The temperature control system according to any one of claims 1 to 3, wherein the power assembly comprises a motor and a reducer;

The first pipeline includes a manifold, a first branch pipe and a second branch pipe, and the manifold is connected to the heat exchange outlet and the second medium outlet;

The first branch pipe is connected to the manifold and is used to transport the heat exchange medium to the motor, and the second branch pipe is connected to the manifold and is used to transport the heat exchange medium to the reducer.
The temperature control system according to claim 4 further includes a controller and a second sensor, wherein the second sensor is used to detect the temperature of the motor, and the controller is at least used to receive the temperature signal detected by the second sensor and adjust the flow rate of the heat exchange medium.
The temperature control system according to any one of claims 1 to 5, further comprising a filtering mechanism, wherein the filtering mechanism is connected to the medium inlet and the storage component.
The temperature control system according to claim 6, wherein the filtering mechanism comprises a first filter and a second filter, the first filter is connected to the storage component, and the second filter is connected to the first filter and the medium inlet;

The filtering accuracy of the second filter is higher than that of the first filter.
The temperature control system according to any one of claims 1 to 7, wherein the temperature control valve comprises:

The housing is provided with the second medium outlet, the medium inlet and the first medium outlet which are sequentially arranged along the arrangement direction;

a core housed in the housing, the core being configured to expand when heated; and

An elastic member is arranged along the arrangement direction with the core and abuts against the core, one end of the elastic member away from the core abuts against the shell, and one end of the core away from the elastic member abuts against the shell.
The temperature control system according to any one of claims 1 to 8, wherein the heat exchange medium comprises insulating oil.
A power device, comprising:

Powertrain; and

According to the temperature control system according to any one of claims 1 to 9, the first pipeline and the second pipeline are connected to the power assembly.