An electronically controlled multi-way valve, a thermal management device for electric vehicles, and a control method thereof

Abstract

The embodiments of the present application provide an electrically controlled multi-way valve, an electric vehicle thermal management device, and a control method, relating to the technical field of electric vehicles. The electrically controlled multi-way valve includes a multi-way valve body, a rotating shaft, a Hall effect sensor, and a valve body controller; the multi-way valve body is provided with a rotating shaft mounting groove, the rotating shaft is fixedly mounted on the multi-way valve body through a rotating shaft mounting operation, the multi-way valve body rotates synchronously with the rotating shaft, and the multi-way valve body is used for integrated coupling with the electric drive system, battery system, air conditioning system, and filling expansion tank of the electric vehicle; the Hall effect sensor is fixedly mounted on the rotating shaft, and the Hall effect sensor is used to detect the position information of the rotating shaft; the valve body controller is connected to the multi-way valve body, and the valve body controller is used to control the rotation of the multi-way valve body. The electrically controlled multi-way valve can achieve the technical effect of ensuring the accuracy of the valve body position and improving the reliability of the multi-way valve control.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to an electrically controlled multi-way valve, a thermal management device for an electric vehicle, and a control method. Background Art

[0002] In recent years, my country has seen rapid growth in electric vehicles. With the pressure of achieving the "dual carbon" energy goals, energy consumption targets for electric vehicles have become increasingly stringent, necessitating the development of more efficient integrated vehicle thermal management technologies. Domestic vehicle manufacturers have begun developing integrated thermal management technologies. Typically, these technologies utilize a combination of three-way or four-way valves to physically couple an electric vehicle's electric drive system, battery system, and air conditioning system. These integrated thermal management systems enable flexible control based on vehicle operating conditions, maximizing overall vehicle energy efficiency, reducing energy consumption, and increasing vehicle range.

[0003] In the prior art, the technical core of the integrated thermal management system lies in the combined design of the multi-way valve. Usually, the multi-way valve body is driven by a stepper motor or a brushless DC motor, and the position of the valve body is accurately controlled by a controller to achieve the target mode required by the vehicle. The position of the multi-way valve needs to be precisely controlled, otherwise it will cause the coupling circuits to be cross-linked, affecting the thermal management performance of the vehicle. In order to obtain the accurate position of the multi-way valve body, the absolute position Hall counter method and the relative position Hall counter method are generally used. Among them, the absolute position Hall counter method is simple to control, but the hardware cost is relatively high, and an absolute position Hall device needs to be selected, and the processing circuit becomes complicated; in comparison, the relative position Hall counter method is a relatively effective and low-cost method with simple hardware, and a software control strategy is required to achieve the same control effect. However, since the relative Hall counter can only obtain the relative position of the valve body, the absolute position needs to be obtained through memory storage. To obtain the absolute position, a special manual search and acquisition of the reference position is first required. For example, the upper and lower locking positions of the valve body structure are used as limit and reference references. The absolute position is then calculated by combining the reference position and the relative position Hall counter value. This absolute position information needs to be used repeatedly, making timely data storage and recall necessary. Therefore, it must be stored in the controller for future use. If Hall data is lost or Hall position errors accumulate during use, the position signal will be offset or erroneous, causing application problems. Ensuring the accurate storage of absolute position information without loss is a major challenge in application development. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an electrically controlled multi-way valve, a thermal management device for an electric vehicle, and a control method, which can achieve the technical effect of ensuring the accuracy of the valve body position and improving the reliability of the multi-way valve control.

[0005] In a first aspect, an embodiment of the present application provides an electrically controlled multi-way valve, comprising a multi-way valve body, a rotating shaft, a Hall sensor, and a valve body controller;

[0006] The multi-way valve body is provided with a shaft mounting groove, and the shaft is fixedly mounted on the multi-way valve body through a shaft mounting operation. The multi-way valve body rotates synchronously with the shaft. The multi-way valve body is used for integrated coupling with the electric drive system, battery system, air conditioning system and filling expansion pot of the electric vehicle;

[0007] The Hall sensor is fixedly mounted on the rotating shaft, and the Hall sensor is used to detect the position information of the rotating shaft;

[0008] The valve body controller is connected to the multi-way valve body, and the valve body controller is used to control the rotation of the multi-way valve body.

[0009] In the above implementation process, the electronically controlled multi-way valve adopts an integrated structural design, which integrates and couples the electric drive system, battery system, air-conditioning system and filling expansion pot of the electric vehicle, and can realize multiple position modes according to the working conditions of the whole vehicle, greatly improving the performance of the thermal management system of the whole vehicle; in order to further streamline the structure and improve product reliability, the Hall sensor method is adopted, the hardware circuit is simpler, the device cost becomes cheaper, the hardware is simplified, and the cost is significantly reduced; therefore, the electronically controlled multi-way valve can achieve the technical effect of ensuring the accuracy of the valve body position and improving the reliability of the multi-way valve control.

[0010] Furthermore, the electrically controlled multi-way valve is provided with a plurality of communication ports, and the communication passages between the plurality of communication ports are controlled by the valve body controller.

[0011] In the above implementation process, the electronically controlled multi-way valve is integrated and coupled with the electric drive system, battery system, air-conditioning system and filling expansion pot of the electric vehicle through multiple interfaces, and the thermal management control mode of the electric vehicle is controlled through the connection of multiple interfaces.

[0012] Furthermore, the valve body controller is connected to the Hall sensor, and the valve body controller obtains the position information of the multi-way valve body through the Hall count value of the Hall sensor.

[0013] Furthermore, the Hall sensor is a relative position Hall sensor.

[0014] In the above implementation process, the continuous alternating signal generated by the relative position Hall sensor is acquired by the valve body controller to calculate and determine the position of the multi-way valve body.

[0015] In a second aspect, an embodiment of the present application provides a thermal management device for an electric vehicle, wherein the thermal management device for the electric vehicle comprises the electrically controlled multi-way valve described in any one of the first aspects.

[0016] In a third aspect, an embodiment of the present application provides a control method, which is applied to the electrically controlled multi-way valve according to any one of the first aspects, and the method includes:

[0017] Determining whether the absolute position Hall counting value of the Hall sensor is stored normally;

[0018] If not, performing initialization and zeroing processing on the electronically controlled multi-way valve according to a preset second strategy;

[0019] If so, determining whether the accumulated position Hall counting value of the Hall sensor is greater than or equal to a preset threshold;

[0020] If not, performing cumulative Hall counting processing on the electronically controlled multi-way valve according to a preset first strategy;

[0021] If so, the step of initializing and returning the electrically controlled multi-way valve to zero according to the preset second strategy is executed.

[0022] Furthermore, the step of performing cumulative Hall counting processing on the electrically controlled multi-way valve according to the preset first strategy includes:

[0023] Obtain valve body position information and valve body request position information;

[0024] Acquire a first Hall effect count value according to the valve body position information, and acquire a second Hall effect count value according to the valve body requested position information;

[0025] Determine whether the first Hall counting value is less than the second Hall counting value;

[0026] If so, start the electronically controlled multi-way valve to rotate forward;

[0027] If not, start the electronically controlled multi-way valve to rotate in the reverse direction.

[0028] Furthermore, after the step of starting the forward rotation of the electrically controlled multi-way valve, the method further comprises:

[0029] Get the relative Hall counting value of the valve body in forward rotation;

[0030] When the difference between the current Hall count value of the Hall sensor and the second Hall count value is less than a preset value, the forward rotation of the electrically controlled multi-way valve is stopped, and the accumulated position Hall count value is updated according to the relative Hall count value of the forward rotation of the valve body.

[0031] Furthermore, after the step of starting the reverse rotation of the electrically controlled multi-way valve, the method further comprises:

[0032] Get the relative Hall counting value of valve body reversal;

[0033] When the difference between the current Hall count value of the Hall sensor and the second Hall count value is less than a preset value, the reverse rotation of the electrically controlled multi-way valve is stopped, and the accumulated position Hall count value is updated according to the relative Hall count value of the valve body reversal.

[0034] Furthermore, the step of initializing and returning the electrically controlled multi-way valve to zero according to the preset second strategy includes:

[0035] Controlling the electrically controlled multi-way valve to rotate in the reverse direction, and starting relative Hall counting from zero, which is recorded as a first relative Hall counting value;

[0036] When the change value of the first relative Hall count value is less than or equal to a preset value, the absolute position Hall count value of the Hall sensor is set to zero, the electrically controlled multi-way valve is controlled to rotate forward, and the relative Hall count is started from zero, which is recorded as a second relative Hall count value;

[0037] When the change value of the second relative Hall count value is less than or equal to the preset value, determine whether the difference between the second relative Hall count value and the preset full-scale Hall count value is less than the preset value. If so, complete the initialization and zeroing processing of the electrically controlled multi-way valve; if not, the initialization of the electrically controlled multi-way valve fails and a fault message is generated.

[0038] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0039] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic diagram of the structure of an electrically controlled multi-way valve provided in an embodiment of the present application;

[0042] Figure 2 A flow chart of a control method provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of a process flow of a preset first strategy provided in an embodiment of the present application;

[0044] Figure 4 A flowchart of the steps for performing cumulative Hall counting processing for forward rotation provided in an embodiment of the present application;

[0045] Figure 5 A flowchart of the steps for performing cumulative Hall counting processing for reverse rotation provided in an embodiment of the present application;

[0046] Figure 6 A schematic diagram of the process flow of the preset second strategy provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0048] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0049] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0050] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or point connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0051] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0052] The embodiments of the present application provide an electrically controlled multi-way valve, an electric vehicle thermal management device and a control method, which can be applied to the thermal management process of electric vehicles; the electrically controlled multi-way valve adopts an integrated structural design, which integrates and couples the electric drive system, battery system, air-conditioning system and filling expansion pot of the electric vehicle, and can realize multiple position modes according to the working conditions of the whole vehicle, thereby greatly improving the performance of the thermal management system of the whole vehicle; in order to further streamline the structure and improve product reliability, a Hall sensor method is adopted, the hardware circuit is simpler, the device cost becomes cheaper, the hardware is simplified, and the cost is significantly reduced; therefore, the electrically controlled multi-way valve can achieve the technical effect of ensuring the accuracy of the valve body position and improving the reliability of the multi-way valve control.

[0053] See Figure 1 , Figure 1 This is a structural schematic diagram of an electrically controlled multi-way valve provided in an embodiment of the present application, which includes a multi-way valve body 100, a rotating shaft 200, a Hall sensor 300 and a valve body controller 400.

[0054] Exemplarily, the multi-way valve body 100 is provided with a shaft mounting groove, and the shaft 200 is fixedly installed on the multi-way valve body 100 through a shaft mounting operation. The multi-way valve body 100 rotates synchronously with the shaft 200. The multi-way valve body 100 is used for integrated coupling with the electric drive system, battery system, air-conditioning system and filling expansion pot of the electric vehicle.

[0055] Exemplarily, the Hall sensor 300 is fixedly mounted on the rotating shaft 200 , and the Hall sensor 300 is used to detect position information of the rotating shaft 100 .

[0056] For example, Hall sensor 300 is a magnetic field sensor based on the Hall effect. The Hall effect is a type of magnetoelectric effect. The Hall effect in semiconductors is much stronger than that in metals. Various Hall elements made using this phenomenon are widely used in industrial automation, detection technology, and information processing.

[0057] Exemplarily, the valve body controller 400 is connected to the multi-way valve body 100 , and the valve body controller 400 is used to control the rotation of the multi-way valve body 100 .

[0058] For example, the electrically controlled multi-way valve adopts an integrated structural design, integrating and coupling the electric drive system, battery system, air-conditioning system and filling expansion pot of the electric vehicle, and can realize multiple position modes according to the working conditions of the whole vehicle, greatly improving the performance of the thermal management system of the whole vehicle; in order to further streamline the structure and improve product reliability, the Hall sensor 300 is adopted, the hardware circuit is simpler, the device cost becomes cheaper, the hardware is simplified, and the cost is significantly reduced; therefore, the electrically controlled multi-way valve can achieve the technical effect of ensuring the accuracy of the valve body position and improving the reliability of the multi-way valve control.

[0059] Exemplarily, the electrically controlled multi-way valve is provided with a plurality of communication ports, and the communication passages between the plurality of communication ports are controlled by the valve body controller 400 .

[0060] For example, Figure 1 As shown, the electronically controlled multi-way valve includes six interfaces from P1 to P6, which are integrated and coupled with the electric drive system, battery system, air-conditioning system and filling expansion pot of the electric vehicle respectively through the six interfaces, and the whole vehicle thermal management control mode of the electric vehicle is controlled through the connection of the six interfaces from P1 to P6.

[0061] Exemplarily, the valve body controller 400 is connected to the Hall sensor 300 , and the valve body controller 400 obtains the position information of the multi-way valve body 100 through the Hall count value of the Hall sensor 300 .

[0062] Exemplarily, the Hall sensor is a relative position Hall sensor.

[0063] For example, the continuous alternating signal generated by the relative position Hall sensor is acquired by the valve body controller 400 to calculate and determine the position of the multi-way valve body 100 .

[0064] In some implementation scenarios, the valve body controller 400 obtains relative position information through the Hall sensor 300, and also needs to calculate the current absolute position information by reading the stored historical absolute position information. During use, abnormal situations such as Hall data loss may occur, or the cumulative error of the Hall position may cause position deviation. In this case, the multi-way valve position needs to be initialized and reset to zero regularly to correct the absolute position signal to ensure the normal use of the electric multi-way valve.

[0065] In some embodiments, the present application provides a thermal management device for an electric vehicle, the thermal management device for an electric vehicle comprising: Figure 1 The electrically controlled multi-port valve shown.

[0066] For example, the electronically controlled multi-way valve uses a relative Hall counter to detect the valve body position. In view of the difficulty of absolute position addressing of the multi-way valve body, an initialization zeroing control method is proposed. The method can automatically perform the initialization zeroing operation under the static working condition of the whole vehicle, accurately find the reference position of the multi-way valve body, repair the position deviation of the multi-way valve body, and effectively ensure the detection accuracy of the valve body Hall position.

[0067] See Figure 2 , Figure 2 A flow chart of a control method provided in an embodiment of the present application, which is applied to Figure 1 The control method of the electrically controlled multi-way valve shown includes the following steps:

[0068] S100: Determine whether the absolute position Hall counting value of the Hall sensor is stored normally;

[0069] If not, jump to S400: initialize and reset the electronically controlled multi-way valve according to the preset second strategy;

[0070] If yes, S200: determining whether the accumulated position Hall counting value of the Hall sensor is greater than or equal to a preset threshold;

[0071] If not, S300: performing cumulative Hall counting processing on the electronically controlled multi-way valve according to a preset first strategy;

[0072] If so, S400: performing a step of initializing and returning the electronically controlled multi-way valve to zero according to a preset second strategy.

[0073] Exemplarily, the initialization zeroing condition of the electrically controlled multi-way valve is determined, and according to different situations, a preset first strategy is executed to perform cumulative Hall counting processing on the electrically controlled multi-way valve or a preset second strategy is executed to perform initialization zeroing processing on the electrically controlled multi-way valve.

[0074] See Figure 3 , Figure 3 A schematic diagram of the process flow of the preset first strategy provided in an embodiment of the present application.

[0075] Exemplarily, S300: the step of performing cumulative Hall counting processing on the electrically controlled multi-way valve according to a preset first strategy includes:

[0076] S310: Acquire valve body position information and valve body request position information;

[0077] S320: Acquire a first Hall effect count value according to the valve body position information, and acquire a second Hall effect count value according to the valve body requested position information;

[0078] S330: Determine whether the first Hall counting value is less than the second Hall counting value;

[0079] If yes, S340: start the electronically controlled multi-way valve to rotate forward;

[0080] If not, S350: start the electronically controlled multi-way valve to rotate in the reverse direction.

[0081] Exemplarily, the valve body position information is the current position information of the multi-way valve body, and the valve body request position information is the target rotation position information of the multi-way valve body; accordingly, the first Hall count value is the Hall count value of the Hall sensor corresponding to the valve body position information, and the second Hall count value is the Hall count value of the Hall sensor corresponding to the valve body request position information, and the electric multi-way valve is controlled to rotate forward or reverse according to the size of the two.

[0082] See Figure 4 , Figure 4 A flowchart of the steps for cumulative Hall counting processing for forward rotation provided in an embodiment of the present application.

[0083] Exemplarily, after the step of starting the electronically controlled multi-way valve to rotate in the forward direction at step S340, the method further includes:

[0084] S341: Obtain the relative Hall counter value of the valve body in forward rotation;

[0085] S342: When the difference between the current Hall count value of the Hall sensor and the second Hall count value is less than a preset value, the forward rotation of the electronically controlled multi-way valve is stopped, and the accumulated position Hall count value is updated according to the relative Hall count value of the forward rotation of the valve body.

[0086] See Figure 5 , Figure 5 A flowchart of the steps for performing cumulative Hall counting processing for reverse rotation provided in an embodiment of the present application.

[0087] Exemplarily, after the step of starting the reverse rotation of the electrically controlled multi-way valve at S350, the method further includes:

[0088] S351: Obtaining the relative Hall counter value of the valve body reversal;

[0089] S352: When the difference between the current Hall count value of the Hall sensor and the second Hall count value is less than a preset value, the reverse rotation of the electronically controlled multi-way valve is stopped, and the accumulated position Hall count value is updated according to the relative Hall count value of the valve body reversal.

[0090] See Figure Figure 6 , Figure 6 A schematic diagram of the process flow of the preset second strategy provided in an embodiment of the present application.

[0091] Exemplarily, S400: performing initialization and zeroing processing on the electronically controlled multi-way valve according to the preset second strategy includes:

[0092] S410: Control the electronically controlled multi-way valve to rotate in the reverse direction, and start relative Hall counting from zero, which is recorded as the first relative Hall counting value;

[0093] S420: When the change value of the first relative Hall count value is less than or equal to the preset value, the absolute position Hall count value of the Hall sensor is set to zero, the electronically controlled multi-way valve is controlled to rotate forward, and the relative Hall count is started from zero, which is recorded as the second relative Hall count value;

[0094] S430: When the change value of the second relative Hall count value is less than or equal to the preset value, determine whether the difference between the second relative Hall count value and the preset full-scale Hall count value is less than the preset value. If so, complete the initialization and zeroing processing of the electronically controlled multi-way valve; if not, the initialization of the electronically controlled multi-way valve fails and a fault message is generated.

[0095] For example, in combination Figures 1 to 6 The specific process example of the control method of the electric-controlled multi-way valve provided in the embodiment of the present application is as follows:

[0096] S1: After the valve body controller is powered on, it is determined whether the Hall counting value of the absolute position is stored normally or whether its stored value is abnormal. If both are abnormal, the preset second strategy is executed and the process goes to step S4; if normal, the preset first strategy is executed and the process goes to step S3;

[0097] S2: Determine whether the accumulated value of the Hall counter has reached the accumulated mileage H sum ≥N*H max If the requirements are met, the preset second strategy is executed and the process goes to step S4; if the requirements are not met, the preset first strategy is executed and the process goes to step S3;

[0098] S3: Execute the preset first strategy and enter the cumulative Hall counting process;

[0099] S4: Execute the preset second strategy and enter the initialization zeroing process;

[0100] The first preset strategy: cumulative Hall counting process, the specific steps are as follows:

[0101] S5: Multi-way control valve requests position information of valve body P a →Valve body request position information P b ;

[0102] S6: Read the Hall count H of the current position a , and the stored cumulative Hall count H sum (n); two positions P a and P b The target Hall values are H map_a , H map_b ;

[0103] S7: Determine the size of the Hall value at the two positions. If H map_a <H map_b , then jump to the next step; otherwise, go to step S12;

[0104] S8: Start the forward rotation of the electronically controlled multi-way valve and start counting the relative Hall value H from zero act+ ;

[0105] S9: Target position arrival judgment H map_b -H a -H act+ ≤δ, δ is the accuracy error value of the Hall position (preset value). If the difference is within the δ range, it means that the target position has been reached. Otherwise, the multi-way valve will continue to operate.

[0106] S10: Stop the multi-way valve action and reach the default position Pb; record the absolute position Hall counter value H abs =H a +H act+ , update the cumulative Hall counting value H sum (n+1)=H sum (n)+H act+ ;

[0107] S11: Complete the absolute position Hall counting value H abs And the accumulated Hall count value H sum Storage, end step;

[0108] S12: Start the multi-way valve to rotate in the reverse direction and start counting the relative Hall value H from zero act- ;

[0109] S13: Target position arrival judgment H a -H map_b -H act- ≤δ, δ is the accuracy error value of the Hall position (preset value). If the difference is within the δ range, it means that the target position has been reached. Otherwise, the multi-way valve will continue to operate.

[0110] S14: Stop the electric multi-way valve and the default position is P b ;Record the absolute position Hall counting value H abs =H a +H act- , update the cumulative Hall counting value H sum (n+1)=H sum (n)+H act- ;

[0111] S15: Complete the absolute position Hall counting value H abs And the accumulated Hall count value H sum The storage step ends.

[0112] The second preset strategy: Initialize the zero control process, specifically including the following steps:

[0113] S16: Control the electronically controlled multi-way valve to rotate in the opposite direction, and start the relative Hall counting H from zero. act ;

[0114] S17: Determine the change of the Hall counting value within a certain period of time. For example, if the relative Hall counting value changes very little within several adjacent software cycles, ΔH act ≤δ, then go to the next step; otherwise, maintain this step and control the multi-way valve to continue to rotate in the reverse direction;

[0115] S18: Set the absolute position Hall value to H abs =0, the control valve body rotates forward, and the relative Hall counting H starts from zero act ;

[0116] S19: Determine the change of the Hall counting value within a certain period of time. For example, if the relative Hall counting value changes very little within several adjacent software cycles, ΔH act ≤δ, then proceed to the next step;

[0117] S20: Determine that the relative Hall counting value reaches the maximum range |H max -H act |≤δ, if the conditions are met, initialization is completed, exit, and use is normal; if the conditions are not met, initialization fails, exit, and report the fault.

[0118] Wherein, N is the number of calibration runs of the valve body (multi-way valve body) for the full-scale endurance test, in units of times; H max The maximum Hall number of the full range of the valve body; H sum is the accumulated Hall counting value; P a 、P b is the position of the valve body; H map_a 、H map_b is the valve body position P a 、P b The absolute position Hall counting value calibrated by the test; H act+ H is the relative Hall counting value of the valve body in forward rotation; act- ΔH is the relative Hall counting value of the valve body reversal; act is the change in the relative Hall calculation value within several adjacent software cycles; δ is the accuracy error of the Hall position, generally 2 to 5; H abs It is the absolute position Hall counting value.

[0119] For example, embodiments of the present application provide an intelligent electronically controlled multi-way valve and initialization zeroing control method for electric vehicles. This electronically controlled multi-way valve utilizes an integrated structural design, integrating and coupling the electric drive system, battery system, air conditioning system, and refueling expansion tank of the electric vehicle. This allows for a variety of position modes tailored to the vehicle's operating conditions, significantly enhancing the performance of the vehicle's thermal management system. To further streamline the structure and improve product reliability, the position detection method for the intelligent electronically controlled multi-way valve described in this application utilizes a relative Hall effect counter (Hall effect counter) approach. This simplifies the hardware circuitry, reduces component costs, and significantly reduces hardware costs. More importantly, an initialization zeroing control method is proposed to address the difficulties of absolute position addressing of the multi-way valve body. This comprehensive control method includes both determining the initialization zeroing conditions and implementing the initialization zeroing operation, enabling effective control of the valve body's initialization zeroing. Under normal vehicle operating conditions, the valve body's Hall effect counter values are calculated in real time based on the valve body's position changes. If the accumulated Hall effect counter values reach a certain range upper limit, indicating that the accumulated error has reached the upper limit, the method automatically performs the valve body initialization zeroing operation and corrects the relative error in the Hall effect counters. This method also takes into account abnormal situations, such as sudden power outages in the vehicle or controller anomalies that result in data not being properly stored. Initialization and zeroing operations can be automatically performed to ensure the accuracy of the valve body position. Furthermore, the initialization and zeroing control operations involved in this control method can be flexibly controlled based on the vehicle's operating conditions, such as performing them during vehicle power-up initialization or before the vehicle is powered down and enters sleep mode, minimizing the impact on vehicle operating performance and greatly facilitating vehicle application.

[0120] For example, the embodiments of the present application propose an electronically controlled multi-way valve, a thermal management device for electric vehicles, and a control method, which are applicable to various types of pure electric-driven electric passenger vehicles, commercial vehicles, logistics vehicles, hybrid vehicles, fuel cell vehicles, etc.

[0121] In all embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms will not be elaborated in the embodiments of the present application.

[0122] It should be understood that the phrases “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0123] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution 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 the present application.

[0124] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An electrically controlled multi-way valve, characterized in that: It includes a multi-way valve body, a rotating shaft, a Hall sensor and a valve body controller; The multi-way valve body is provided with a shaft mounting groove, and the shaft is fixedly mounted on the multi-way valve body through the shaft mounting groove. The multi-way valve body rotates synchronously with the shaft. The multi-way valve body is used to be integrated with the electric drive system, battery system, air conditioning system and filling expansion pot of the electric vehicle; The Hall sensor is fixedly mounted on the rotating shaft, and the Hall sensor is used to detect the position information of the rotating shaft; The valve body controller is connected to the multi-way valve body, and the valve body controller is used to control the rotation of the multi-way valve body; The electrically controlled multi-way valve is provided with a plurality of communication ports, and the communication paths between the plurality of communication ports are controlled by the valve body controller; the valve body controller is connected to the Hall sensor, and the valve body controller obtains the position information of the multi-way valve body through the Hall count value of the Hall sensor; The control method of the electrically controlled multi-way valve includes: Determining whether the absolute position Hall counting value of the Hall sensor is stored normally; If not, performing initialization and zeroing processing on the electronically controlled multi-way valve according to a preset second strategy; If so, determining whether the accumulated position Hall counting value of the Hall sensor is greater than or equal to a preset threshold; If not, performing cumulative Hall counting processing on the electronically controlled multi-way valve according to a preset first strategy; If yes, executing the step of initializing and returning the electrically controlled multi-way valve to zero according to the preset second strategy; The step of performing cumulative Hall counting processing on the electrically controlled multi-way valve according to a preset first strategy includes: Obtain valve body position information and valve body request position information; Acquire a first Hall effect count value according to the valve body position information, and acquire a second Hall effect count value according to the valve body requested position information; Determine whether the first Hall counting value is less than the second Hall counting value; If so, start the electronically controlled multi-way valve to rotate forward; If not, start the electronically controlled multi-way valve to rotate in the opposite direction; The step of initializing and returning the electrically controlled multi-way valve to zero according to the preset second strategy includes: Controlling the electrically controlled multi-way valve to rotate in the reverse direction, and starting relative Hall counting from zero, which is recorded as a first relative Hall counting value; When the change value of the first relative Hall count value is less than or equal to a preset value, the absolute position Hall count value of the Hall sensor is set to zero, the electrically controlled multi-way valve is controlled to rotate forward, and the relative Hall count is started from zero, which is recorded as a second relative Hall count value; When the change value of the second relative Hall count value is less than or equal to the preset value, determine whether the difference between the second relative Hall count value and the preset full-scale Hall count value is less than the preset value. If so, complete the initialization and zeroing processing of the electrically controlled multi-way valve; if not, the initialization of the electrically controlled multi-way valve fails and a fault message is generated.

2. The electrically controlled multi-way valve according to claim 1, characterized in that: The Hall sensor is a relative position Hall sensor.

3. The electrically controlled multi-way valve according to claim 1, characterized in that: After the step of starting the forward rotation of the electrically controlled multi-way valve, the method further comprises: Get the relative Hall counting value of the valve body in forward rotation; When the difference between the current Hall count value of the Hall sensor and the second Hall count value is less than a preset value, the forward rotation of the electrically controlled multi-way valve is stopped, and the accumulated position Hall count value is updated according to the relative Hall count value of the forward rotation of the valve body.

4. The electrically controlled multi-way valve according to claim 1, characterized in that: After the step of starting the reverse rotation of the electrically controlled multi-way valve, the method further comprises: Get the relative Hall counting value of valve body reversal; When the difference between the current Hall count value of the Hall sensor and the second Hall count value is less than a preset value, the reverse rotation of the electrically controlled multi-way valve is stopped, and the accumulated position Hall count value is updated according to the relative Hall count value of the valve body reversal.

5. A thermal management device for an electric vehicle, characterized in that: The thermal management device of the electric vehicle includes the electrically controlled multi-way valve according to any one of claims 1 to 4.

Images