Oil-cooled integrated structure, electric drive system and vehicle

Abstract

This application provides an integrated oil-cooled structure, an electric drive system, and a vehicle. The system includes an oil cooler with an internal bypass oil passage, and an oil inlet and outlet connected to the bypass oil passage. A bypass valve includes a valve core assembly and a connector. At least a portion of the valve core assembly is located within the bypass oil passage. One end of the connector is connected to the valve core assembly, and the other end abuts against the bypass oil passage. The valve core assembly is located on the bypass oil passage near the oil inlet. When the amount of oil entering the bypass oil passage through the inlet does not exceed a preset value, the bypass oil passage is in a conducting state. When the amount of oil exceeds the preset value, the valve core assembly moves to switch the bypass oil passage to a closed state. This integrated design minimizes the overall structure and reduces the number of oil passages and interface seals.

Description

Technical Field

[0001] This application relates to the field of oil-cooled integrated structure technology, and more specifically, to an oil-cooled integrated structure, an electric drive system, and a vehicle. Background Technology

[0002] The electric drive system of a new energy vehicle can include a motor and a motor controller. Since the motor controller is usually directly mounted on the motor, the motor housing can be integrated with the motor controller housing; for example, the controller housing can be integrally formed and located on the outside of the motor housing. Both the motor and the motor controller can be equipped with corresponding cooling structures to achieve their own cooling. The motor can use oil cooling, while the motor controller can use water cooling. The motor's oil cooling structure can include an integrated oil cooling structure, which is dedicated to heat exchange. It uses cooling water to exchange heat with the cooling oil passing through it, ensuring the cooling effect of the oil on the motor.

[0003] In related technologies, in order to achieve selective heat exchange based on the temperature of the cooling oil, an integrated oil cooling structure is generally used in conjunction with a bypass valve. However, in existing structures, the two are arranged separately, resulting in more oil passages and more interfaces that need to be sealed. Utility Model Content

[0004] The purpose of this application is to provide an oil-cooled integrated structure, an electric drive system, and a vehicle, which adopts an integrated design to reduce the overall structure size and reduce the number of oil circuits and interface seals.

[0005] In a first aspect, embodiments of this application provide an integrated oil-cooled structure, comprising: an oil cooler, wherein a bypass oil passage is provided inside the oil cooler, and an oil inlet and an oil outlet are provided on the oil cooler, the oil inlet and the oil outlet being connected to the bypass oil passage; and a bypass valve, comprising a valve core assembly and a connector, wherein at least a portion of the structure of the valve core assembly is disposed in the bypass oil passage, one end of the connector is connected to the valve core assembly, and the other end abuts against the bypass oil passage;

[0006] The valve core assembly is located on the side of the bypass oil passage closer to the oil inlet. When the oil temperature does not exceed a preset value, the bypass oil passage is in a conducting state. After the oil enters the bypass oil passage from the oil inlet, it flows out from the oil outlet. When the oil temperature exceeds the preset value, the valve core assembly moves to switch the bypass oil passage to a closed state. The oil enters from the oil inlet and flows out from the oil outlet after heat exchange in the oil cooler.

[0007] In the above implementation process, the bypass valve is located at the oil inlet of the oil cooler, and at least part of the bypass valve structure is located in the bypass oil circuit of the oil cooler. When the oil temperature does not exceed the preset value, the bypass oil circuit is in a conducting state, so the oil can directly pass through the bypass oil circuit and flow out from the oil outlet. The oil cooler does not need to perform heat exchange on the oil. After a period of circulation, it is beneficial for the oil to heat up quickly, reduce the viscosity of the oil, reduce the oil stirring loss of the electric drive system, and improve the efficiency of the electric drive system when operating at low temperature. When the oil temperature exceeds the preset value, the valve core assembly will move, thereby closing the bypass oil circuit, so that the oil enters from the oil inlet, exchanges heat inside the oil cooler, and finally flows out from the oil outlet, completing the heat exchange process. By integrating the bypass valve into the oil cooler, not only can the overall structure be miniaturized, but also the oil circuit setting and interface sealing can be reduced, the casting difficulty can be reduced, the risk of oil circuit leakage can be reduced, and the yield rate can be improved.

[0008] In some embodiments, the oil cooler includes a mounting substrate and a heat exchange chip, the mounting substrate being connected to the heat exchange chip, and the mounting substrate being provided with the bypass oil passage, the oil inlet and the oil outlet.

[0009] In the above implementation process, the heat exchange chip is connected to the mounting substrate. When the temperature of the oil does not exceed the preset value, the oil can flow out directly through the interior of the mounting substrate. When the temperature exceeds the preset value, the oil exchanges heat inside the heat exchange chip, so that the oil is in a suitable temperature environment, which is beneficial to lubrication and cooling.

[0010] In some embodiments, the mounting substrate has a first inlet and a first outlet inside, the first inlet being connected to the heat exchange chip and the bypass oil circuit, and the first outlet being connected to the heat exchange chip and the oil outlet.

[0011] In the above process, the mounting substrate is provided with a first inlet and a first outlet. When the temperature of the oil exceeds the preset value, the oil enters the heat exchange chip through the first inlet for heat exchange, and finally flows through the first outlet and the oil outlet in sequence to complete the heat exchange of the oil.

[0012] In some embodiments, the cross-sectional area of ​​the mounting substrate is larger than that of the heat exchange chip, and the mounting substrate is provided with mounting holes. By providing mounting holes on the mounting substrate, the oil-cooled integrated structure can be mounted on the housing of the electric drive system, which is beneficial for the overall structure to be installed and fixed, and makes the electric drive system more compact.

[0013] In some embodiments, the heat exchange chip has a first flow channel and a second flow channel inside. The first flow channel is connected to the first inlet and the first outlet, respectively. The first flow channel is used to contain the oil, and the second flow channel is used to contain cooling water. The cooling water is used for heat exchange with the oil.

[0014] In the above process, cooling water flows to the second flow channel and oil flows to the first flow channel. The two exchange heat inside the oil cooler to ensure the cooling and lubrication effect of the oil.

[0015] In some embodiments, the oil cooler further includes a second inlet and a second outlet, the second inlet and the second outlet being respectively connected to the heat exchange chip, and both being in communication with the heat exchange chip.

[0016] In some embodiments, the valve core assembly includes a wax valve body, which is solid when the temperature of the oil does not exceed the preset value, and liquid when the temperature of the oil exceeds the preset value.

[0017] In some embodiments, the oil-cooled integrated structure further includes a fixing member that connects the valve core assembly and the oil cooler respectively.

[0018] In some embodiments, the bypass oil passage includes a first oil passage and a second oil passage, the first oil passage is connected to the second oil passage, the cross-sectional area of ​​the first oil passage is larger than the cross-sectional area of ​​the second oil passage, and the first oil passage is provided with the connector and the valve core assembly.

[0019] In the above implementation process, the cross-sectional areas of the first oil circuit and the second oil circuit are different. When the valve core assembly moves, the end of the first oil circuit can abut against the connector, which is conducive to the connector storing potential energy. When the oil is at or below the preset value, the valve core assembly can return to its original position, which is conducive to the low-temperature circulation of the oil, reduces the viscosity of the oil, reduces the oil stirring loss of the electric drive system, and improves the efficiency of the electric drive system when working at low temperature.

[0020] In some embodiments, the connector includes a spring. This allows for dynamic adjustment based on the oil temperature, improving the low-temperature start-up efficiency of the electric drive system and increasing the overall driving range of the vehicle.

[0021] Secondly, this application also provides an electric drive system, including the oil-cooled integrated structure as described in any of the preceding claims.

[0022] Since the electric drive system provided in the second aspect includes an oil-cooled integrated structure, the electric drive system has all the technical effects of the oil-cooled integrated structure, which will not be elaborated here.

[0023] Thirdly, this application also provides a vehicle including the electric drive system described above.

[0024] Since the vehicle provided by the third party includes an electric drive system, the vehicle has all the technical effects of an electric drive system, which will not be elaborated here.

[0025] Other features and advantages of this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described techniques of this application.

[0026] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the oil-cooled integrated structure provided in the embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the oil-cooled integrated structure provided in an embodiment of this application from another perspective;

[0030] Figure 3 for Figure 2 AA section view;

[0031] Figure 4 for Figure 3 CC section view.

[0032] Figure Labels

[0033] 10. Oil cooler; 101. Bypass oil passage; 1011. First oil passage; 1012. Second oil passage; 102. Mounting base plate; 1021. Mounting hole; 103. Heat exchange chip; 104. Oil inlet; 105. Oil outlet; 106. First inlet; 107. First outlet; 108. Second inlet; 109. Second outlet; 110. First gap; 111. Second gap; 20. Bypass valve; 201. Valve core assembly; 2011. Valve seat; 2012. Paraffin wax; 2013. Piston rod; 2014. Guide ring; 2015. Sealing diameter ring; 202. Connector; 30. Fixing component. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0039] Example

[0040] The electric drive system contains many heat sources, such as the electronic control system, motor system, and reducer system. If this heat is not dissipated in time, these systems will fail and burn out due to high temperatures. Therefore, a cooling system is essential for the electric drive system. A separate cooling system needs to be established from the vehicle and routed to the electric drive system. This cooling system then transfers heat to the electronic control system and oil cooler to remove excess heat from these systems, maintaining their temperatures within a reasonable range.

[0041] Currently, there are two solutions for oil cooling and oil circuits in electric drive assemblies: The first solution is to only install an oil cooler. As long as the electric drive is working, oil will pass through the oil cooler. This means that the oil does not need to be cooled at low temperatures, the oil cannot heat up quickly, the oil viscosity is high, and the oil churning loss is increased. The second solution is to install an oil cooler and a bypass valve, which can solve the problems of the first solution. However, since the two are installed separately, there are more oil circuits and more interfaces that need to be sealed.

[0042] In view of this, such as Figures 1-3 As shown, in a first aspect, this application provides an integrated oil cooling structure, including an oil cooler 10 and a bypass valve 20. The bypass valve 20 is disposed on the oil cooler 10 and can be used to control the path of the oil through the oil cooler 10, solving the problems of multiple oil circuits in the shell and the difficulty of mold design and casting. The topology layout oil circuit design and reasonable layout of the oil circuit minimize the flow resistance of the oil in the oil circuit. By integrating part of the oil circuit into the oil cooler 10, the design of the shell can be reduced, the casting difficulty is reduced, the risk of oil circuit leakage is reduced, the yield rate is improved, and the shell cost is reduced, realizing a highly integrated design of the bypass valve 20 and the oil cooler 10.

[0043] Specifically, the oil cooler 10 includes a mounting base plate 102 and a heat exchange chip 103. The mounting base plate 102 is connected to the heat exchange chip 103, and the mounting base plate 102 is provided with a bypass oil passage 101, an oil inlet 104, and an oil outlet 105. The oil inlet 104 and the oil outlet 105 are both connected to the bypass oil passage 101. The bypass valve 20 includes a valve core assembly 201 and a connector 202. At least a portion of the structure of the valve core assembly 201 is disposed in the bypass oil passage 101. One end of the connector 202 is connected to the valve core assembly 201, and the other end abuts against the bypass oil passage 101.

[0044] The valve core assembly 201 is located on the side of the bypass oil passage 101 near the oil inlet 104. When the temperature of the oil does not exceed a preset value, the bypass oil passage 101 is in a conducting state. The oil enters the bypass oil passage 101 from the oil inlet 104 and flows out from the oil outlet 105. When the temperature of the oil exceeds the preset value, the valve core assembly 201 moves to switch the bypass oil passage 101 to a closed state. The oil enters from the oil inlet 104 and flows out from the oil outlet 105 after heat exchange with the heat exchange chip 103.

[0045] For example, the oil inlet 104 and the oil outlet 105 are disposed on the same side of the mounting base plate 102. For example, the oil inlet 104 and the oil outlet 105 are both located at the bottom of the mounting base plate 102. The oil inlet 104 and the oil outlet 105 are distributed at intervals, and the bypass oil passage 101 is provided between the oil inlet 104 and the oil outlet 105.

[0046] The oil cooler 10 can employ existing technology. The heat exchange chip 103 is connected above the mounting substrate 102. The mounting substrate 102 can not only be used to install the heat exchange chip 103, but also to install the integrated oil cooler structure formed by integrating the oil cooler 10 and the bypass valve 20 onto the housing of the electric drive system. The housing is provided with an interface for connecting to the oil inlet 104 and the oil outlet 105, and both the oil inlet 104 and the oil outlet 105 are sealed to the interface, for example, by using a sealing ring.

[0047] It is understood that the bypass valve 20 is detached from the oil cooler 10. The bypass valve 20 is located in the bypass oil passage 101 of the oil cooler 10 and is used to control the opening or closing of the bypass oil passage 101. The bypass valve 20 can be automatically controlled or passively controlled, such as controlling its operation based on the detected oil information.

[0048] It should be noted that the preset value includes 50°C. When the temperature of the oil is less than or equal to 50°C, the oil inlet 104 and the oil outlet 105 are respectively connected to the bypass oil passage 101. When the temperature of the oil is greater than 50°C, the bypass valve 20 closes the bypass oil passage 101. Of course, the specific preset value can be set and calibrated according to the actual situation, and it can be greater than 50°C or less than 50°C.

[0049] In the above implementation process, the bypass valve 20 is installed at the oil inlet 104 of the oil cooler 10, and at least a portion of the bypass valve 20 is located in the bypass oil passage 101 of the oil cooler 10. When the oil enters the oil cooler 10 from the oil inlet 104, and the oil temperature does not exceed a preset value, the bypass oil passage 101 is in a conducting state. Therefore, the oil can directly flow out from the oil outlet 105 after passing through the bypass oil passage 101. After a period of circulation, this facilitates rapid heating of the oil, reduces the viscosity of the oil, and lowers the risk of damage to the electric drive system. The oil churning loss is reduced, improving the efficiency of the electric drive system during low-temperature operation. When the oil temperature exceeds the preset value, the valve core assembly 201 will move, thereby closing the bypass oil circuit 101. This allows the oil to enter from the inlet 104, exchange heat inside the oil cooler 10, and finally flow out from the outlet 105, completing the heat exchange process. By integrating the bypass valve 20 into the oil cooler, not only can the overall structure be miniaturized, but also the oil circuit setup and interface sealing can be reduced, the casting difficulty can be reduced, the risk of oil circuit leakage can be reduced, and the yield rate can be improved.

[0050] like Figures 3-4 As shown, the bypass oil passage 101 includes a first oil passage 1011 and a second oil passage 1012. The first oil passage 1011 is connected to the second oil passage 1012. The cross-sectional area of ​​the first oil passage 1011 is larger than the cross-sectional area of ​​the second oil passage 1012. The first oil passage 1011 is provided with the connector 202 and the valve core assembly 201.

[0051] In the above implementation process, the cross-sectional areas of the first oil passage 1011 and the second oil passage 1012 are different. When the valve core assembly 201 moves, the end of the first oil passage 1011 can abut against the connector 202, which is conducive to the connector 202 storing potential energy. When the oil is at or below the preset value, the valve core assembly 201 can return to its original position, which is conducive to the low-temperature circulation of the oil, reduces the viscosity of the oil, reduces the oil stirring loss of the electric drive system, and improves the efficiency of the electric drive system when working at low temperature.

[0052] like Figure 4 As shown, a first gap 110 is provided between a portion of the structure around the valve core assembly 201 and the first oil passage 1011. The first gap 110 is used for the oil to enter the second oil passage 1012. That is, the cross-sectional area of ​​the first oil passage 1011 is larger than the cross-sectional area of ​​the portion of the valve core assembly 201 to form the first gap 110.

[0053] When the temperature of the oil does not exceed the preset value, a second gap 111 is provided between the end of the valve core assembly 201 near the second oil passage 1012 and the second oil passage 1012; when the temperature of the oil exceeds the preset value, the end of the valve core assembly 201 near the second oil passage 1012 is in sealed contact with the second oil passage 1012.

[0054] like Figure 3 As shown, the mounting substrate 102 is provided with a first inlet 106 and a first outlet 107. The first inlet 106 is connected to the heat exchange chip 103 and the bypass oil passage 101, and the first outlet 107 is connected to the heat exchange chip 103 and the oil outlet 105. The first inlet 106 corresponds to the oil inlet 104, and the first outlet 107 corresponds to the oil outlet 105.

[0055] It is understandable that, since the first inlet 106 and the first outlet 107 are both located above the bypass oil passage 101 and there is a certain pressure difference, the bypass valve 20 does not close the first inlet 106 when the bypass oil passage 101 is in the open or closed state. That is, the first inlet 106 is always in the open state. Even if the bypass oil passage 101 is open, due to the certain pressure difference, the oil will directly pass through the bypass oil passage 101 and flow out from the oil outlet 105.

[0056] In the above implementation process, the mounting substrate 102 is provided with a first inlet 106 and a first outlet 107. When the temperature of the oil exceeds the preset value, the oil enters the heat exchange chip 103 through the first inlet 106 for heat exchange, and finally flows through the first outlet 107 and the oil outlet 105 in sequence to complete the heat exchange of the oil.

[0057] like Figures 1-3 As shown, the cross-sectional area of ​​the mounting substrate 102 is larger than that of the heat exchange chip 103, and the mounting substrate 102 is provided with mounting holes 1021. The number of mounting holes 1021 includes, but is not limited to, four, and the four mounting holes 1021 are distributed at intervals around the periphery of the mounting substrate 102. By providing mounting holes 1021 on the mounting substrate 102, the oil-cooled integrated structure can be mounted on the housing of the electric drive system, which is beneficial for the installation and fixation of the overall structure and makes the electric drive system more compact.

[0058] In some embodiments, the heat exchange chip 103 is provided with a first flow channel and a second flow channel. The first flow channel is connected to the first inlet 106 and the first outlet 107 respectively. The first flow channel is used to contain the oil, and the second flow channel is used to contain cooling water. The cooling water is used for heat exchange with the oil. The first flow channel and the second flow channel can be distributed in an alternating or overlapping manner to achieve sufficient heat exchange between the oil and the cooling water.

[0059] During the above process, cooling water flows to the second flow channel and oil flows to the first flow channel. The two exchange heat inside the oil cooler 10 to ensure the cooling and lubrication effect of the oil.

[0060] In some embodiments, the oil cooler 10 further includes a second inlet 108 and a second outlet 109, the second inlet 108 and the second outlet 109 being respectively connected to the heat exchange chip 103 and communicating with the heat exchange chip 103, wherein the second inlet 108 is used for the cooling water to enter the second flow channel of the heat exchange chip 103, the second outlet 109 is used for the cooling water to exit from the heat exchange chip 103, and the second inlet 108 and the second outlet 109 are located at the upper end of the heat exchange chip 103.

[0061] In some embodiments, the valve core assembly 201 includes a wax valve body, which is solid when the temperature of the oil does not exceed the preset value, and liquid when the temperature of the oil exceeds the preset value.

[0062] For example, the valve core assembly 201 includes a valve seat 2011, paraffin wax 2012, a piston rod 2013, a guide ring 2014, and a sealing diameter ring 2015. The valve seat 2011 is connected to the mounting base plate 102, and the piston rod 2013 is connected to the valve seat 2011, with a receiving cavity provided between them. The receiving cavity is used to receive the paraffin wax 2012. The guide ring 2014 is sleeved on the piston rod 2013. The sealing diameter ring 2015 is connected to the end of the piston rod 2013 away from the valve seat 2011. When the temperature of the oil exceeds a preset value, the sealing diameter ring 2015 makes sealing contact with the second oil passage, ultimately closing the bypass oil passage 101.

[0063] In some embodiments, the oil-cooled integrated structure further includes a fastener 30, which connects the valve core assembly 201 and the oil cooler 10 respectively, and the fastener 30 includes, but is not limited to, bolts.

[0064] In some embodiments, the connector 202 includes a spring. This allows for dynamic adjustment based on the oil temperature, improving the low-temperature start-up efficiency of the electric drive system and increasing the overall driving range of the vehicle.

[0065] Secondly, this application also provides an electric drive system, including the oil-cooled integrated structure as described above. The electric drive system further includes a housing, and the oil-cooled integrated structure is fixed to the housing by bolts or the like.

[0066] Its specific working principle is as follows: when the electric drive system is running, the oil in the housing is pressurized by the oil pump and enters the oil cooling integrated structure through the oil inlet 104. When the electric drive system starts at room temperature and works at low temperature (≤50℃, this temperature can be set and calibrated according to actual conditions), the valve core assembly 201 of the bypass valve 20 is on the left side, the bypass oil passage 101 is open, the oil does not pass through the heat exchange chip 103, and flows directly back to the housing through the oil outlet 105 to complete a low temperature cycle. After a period of circulation, it is beneficial for the oil to heat up quickly, reduce the viscosity of the oil, reduce the oil churning loss of the assembly, and improve the efficiency of the assembly when working at low temperature.

[0067] When the electric drive system is operating at a high temperature (>50℃), the valve core assembly 201 of the bypass valve 20 moves to the right, the bypass oil passage 101 is closed, and the oil flows through the oil inlet 104 of the oil cooler 10 and exchanges heat with the cooling water in the heat exchange chip 103. The cooling water enters from the second inlet 108 and flows out from the second outlet 109, which is conducive to sufficient heat exchange. After being cooled, the oil enters the housing from the first outlet 107 and the oil outlet 105, completing one cycle.

[0068] Since the electric drive system provided in the second aspect includes an oil-cooled integrated structure, the electric drive system has all the technical effects of the oil-cooled integrated structure, which will not be elaborated here.

[0069] Thirdly, this application also provides a vehicle, including the electric drive system described above. The vehicle can be a gasoline-powered vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc.

[0070] Since the vehicle provided by the third party includes an electric drive system, the vehicle has all the technical effects of an electric drive system, which will not be elaborated here.

[0071] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0072] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0073] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0074] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. An integrated oil-cooled structure, characterized in that, include: An oil cooler includes a mounting base plate and a heat exchange chip. The mounting base plate is connected to the heat exchange chip, and the mounting base plate is provided with a bypass oil passage, an oil inlet and an oil outlet. The oil inlet and the oil outlet are both connected to the bypass oil passage. A bypass valve includes a valve core assembly and a connector, wherein at least a portion of the structure of the valve core assembly is disposed in the bypass oil passage, and one end of the connector is connected to the valve core assembly and the other end abuts against the bypass oil passage. The valve core assembly is located on the side of the bypass oil passage closer to the oil inlet. When the oil temperature does not exceed a preset value, the bypass oil passage is in a conducting state. After the oil enters the bypass oil passage from the oil inlet, it flows out from the oil outlet. When the oil temperature exceeds the preset value, the valve core assembly moves to switch the bypass oil passage to a closed state. The oil enters from the oil inlet and flows out from the oil outlet after heat exchange with the heat exchange chip.

2. The oil-cooled integrated structure according to claim 1, characterized in that, The bypass oil circuit includes a first oil circuit and a second oil circuit. The first oil circuit is connected to the second oil circuit. The cross-sectional area of ​​the first oil circuit is larger than that of the second oil circuit. The first oil circuit is provided with the connector and the valve core assembly.

3. The oil-cooled integrated structure according to claim 2, characterized in that, A first gap is provided between the peripheral structure of the valve core assembly and the first oil passage, and the first gap is used for the oil to enter the second oil passage.

4. The oil-cooled integrated structure according to claim 2 or 3, characterized in that, When the temperature of the oil does not exceed the preset value, a second gap is provided between the end of the valve core assembly near the second oil passage and the second oil passage; when the temperature of the oil exceeds the preset value, the end of the valve core assembly near the second oil passage is in sealed contact with the second oil passage.

5. The oil-cooled integrated structure according to claim 1, characterized in that, The mounting substrate has a first inlet and a first outlet inside. The first inlet is connected to the heat exchange chip and the bypass oil circuit, and the first outlet is connected to the heat exchange chip and the oil outlet.

6. The oil-cooled integrated structure according to claim 1, characterized in that, The cross-sectional area of ​​the mounting substrate is larger than that of the heat exchange chip, and the mounting substrate is provided with mounting holes.

7. The oil-cooled integrated structure according to claim 5, characterized in that, The heat exchange chip has a first flow channel and a second flow channel inside. The first flow channel is connected to the first inlet and the first outlet respectively. The first flow channel is used to contain the oil, and the second flow channel is used to contain cooling water. The cooling water is used for heat exchange with the oil.

8. The oil-cooled integrated structure according to claim 7, characterized in that, The oil cooler further includes a second inlet and a second outlet, which are respectively connected to the heat exchange chip and are in communication with the heat exchange chip.

9. The oil-cooled integrated structure according to claim 1, characterized in that, The valve core assembly includes a wax-type valve body. When the temperature of the oil does not exceed the preset value, the wax-type valve body is solid, and when the temperature of the oil exceeds the preset value, the wax-type valve body is liquid.

10. The oil-cooled integrated structure according to claim 1, characterized in that, The oil-cooled integrated structure also includes a fixing component, which is connected to the valve core assembly and the oil cooler respectively.

11. An electric drive system, characterized in that, Including the oil-cooled integrated structure as described in any one of claims 1-10.

12. A vehicle, characterized in that, Including the electric drive system as described in claim 11.

Images