CN116766914A - Cooling system control method, device, equipment and storage medium - Google Patents
Cooling system control method, device, equipment and storage medium Download PDFInfo
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- 230000004044 response Effects 0.000 claims description 14
- 239000002826 coolant Substances 0.000 claims description 11
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- 239000012809 cooling fluid Substances 0.000 claims description 3
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Abstract
The embodiment of the application provides a control method, a device, equipment and a storage medium of a cooling system, relating to the technical field of vehicle electric control; based on the final expression of the triggering cooling requirements of various controllers in different scenes, the conditions for uniformly triggering the opening of the cooling loop are set for various controllers to be cooled, so that frequent mode switching of an electric control cooling system is avoided; comprising the following steps: obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time period; determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one controller to be cooled; and controlling the cooling loop to execute a cooling process based on the target flow rate.
Description
[ field of technology ]
The embodiment of the application relates to the technical field of vehicle electric control, in particular to a cooling system control method, a cooling system control device, cooling system control equipment and a storage medium.
[ background Art ]
The new energy vehicle electric control system has a plurality of parts with different types of cooling requirements, the use scenes of the different parts are different, the condition that the same part needs to be cooled under different scenes and different parts are different, for example, an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) runs for a long time and is frequently switched on and off to generate a great deal of heat loss, and the electric control cooling system needs to be started; when the vehicle-mounted Charger (OBC) is slowly charged, the vehicle-mounted Charger (On Board Charger) starts to work, the temperature gradually rises, and after the temperature exceeds a threshold value, the vehicle-mounted Charger has a cooling requirement; during fast charging, the DC-DC bidirectional converter works DC-DC, the temperature gradually rises, and after exceeding a threshold value, the DC-DC bidirectional converter has a cooling requirement.
Under the above conditions, the controllers respectively initiate cooling requests based on the respective working conditions, and the controllers are responsible for the occurrence of more cooling requests, so that frequent mode switching of the electric control cooling system is finally caused, and unnecessary loss is caused.
[ application ]
The embodiment of the application provides a cooling system control method, a device, equipment and a storage medium, wherein the conditions for uniformly triggering the start of a cooling loop are set for various controllers to be cooled based on the final expression of the triggering cooling requirements of various controllers in different scenes, so that frequent mode switching of an electric control cooling system is avoided.
In a first aspect, an embodiment of the present application provides a cooling system control method, applied to an electronic device, including: obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time period; determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one controller to be cooled; and controlling the cooling loop to execute a cooling process based on the target flow rate.
According to the cooling system control method provided by the embodiment of the application, the conditions for uniformly triggering the start of the cooling loop are set for various controllers to be cooled according to the final standard that the different controllers need to be cooled in the respective application scenes, and the mode switching of the cooling system is started under the uniform conditions, so that the frequent mode switching of the electric control cooling system is avoided; and the target controller which can rapidly reach the cooling standard in a period of time is used for detecting the conduction state of the target controller, so that the preparation time is provided for the target controller to reach the requested cooling temperature immediately, and the problems of power degradation or power interruption caused by untimely response of the cooling system are avoided.
In one possible implementation manner, the method further includes:
obtaining a current accelerator opening change value of a vehicle at the current time;
determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature of the at least one controller to be cooled, wherein the method comprises the following steps of:
and determining the target flow rate of the cooling liquid in the cooling loop according to the current accelerator opening change value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
In one possible implementation manner, determining the target flow rate of the cooling liquid in the cooling loop according to the accelerator opening variation value, the conduction state of the target controller and the temperature variation value of the at least one to-be-cooled controller includes:
obtaining a first PWM corresponding to the conduction state of the target controller;
searching a second PWM corresponding to the target temperature change value in a pre-calibrated corresponding relation between the temperature change value and the electronic water pump pulse width modulation PWM; the target temperature variation value is the largest of the temperature variation values of the at least one controller to be cooled;
finding a third PWM corresponding to the current throttle opening change value according to the corresponding relation between the pre-calibrated throttle opening change value and the electronic water pump pulse width modulation PWM;
Selecting the largest one of the first PWM, the second PWM, and the third PWM as a target PWM for controlling the target flow rate;
controlling the cooling circuit to perform a cooling flow based on the target flow rate, comprising:
and controlling an electronic water pump through the target PWM to enable cold liquid of the cooling loop to circulate according to the target flow rate.
In one possible implementation manner, before determining the target flow rate of the cooling liquid in the cooling circuit according to the on state of the target controller and the temperature variation value of the at least one controller to be cooled, the method further includes:
obtaining a temperature of a cooling fluid in the cooling circuit;
and when the conduction state of the target controller is detected to be on and the temperature of the cooling liquid reaches the pre-request threshold value of the target controller, starting an electronic water pump of the cooling loop.
In one possible implementation manner, the method further includes:
setting a first preset return difference value according to the matching degree of the response speed of the controller to the temperature change and the temperature change trend;
determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one to-be-cooled controller, wherein the method comprises the following steps:
Superposing the first preset return difference value on the temperature change value to obtain a temperature delay change value;
and determining the target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature delay change value.
In one possible implementation manner, the method further includes:
predicting a working condition change trend according to the current accelerator opening change value;
predicting an increasing value of the current accelerator opening change value within a preset time length according to the working condition change trend to obtain a second preset return difference value;
determining a target flow rate of the cooling liquid in the cooling loop according to the current accelerator opening change value, the conducting state of the target controller and the temperature change value of the at least one to-be-cooled controller, wherein the method comprises the following steps:
superposing the second preset return difference value on the current accelerator opening change value to obtain a predicted accelerator opening value;
and determining the target flow rate of the cooling liquid in the cooling loop according to the predicted accelerator opening value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
In one possible implementation manner, the method further includes:
obtaining a current temperature of the cooling liquid;
Searching a target electronic fan opening corresponding to the current temperature of the cooling liquid in a preset corresponding relation between the electronic fan gear and the temperature of the cooling liquid;
controlling the cooling circuit to perform a cooling flow based on the target flow rate, comprising:
and controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
In one possible implementation manner, the method further includes:
obtaining the maximum value of the opening of the electronic fan allowed by the vehicle at the current running speed;
controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening comprises the following steps:
and when the target electronic fan opening is smaller than the maximum electronic fan opening, controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
In one possible implementation manner, before determining the target flow rate of the cooling liquid in the cooling circuit according to the on state of the target controller and the temperature variation value of the at least one controller to be cooled, the method further includes:
when the temperature of any controller to be cooled exceeds a corresponding request cooling threshold value, an electronic water pump of the cooling loop is started;
When the temperature of any to-be-cooled controller is lower than the corresponding request cooling threshold value after being overlapped by the first preset return difference value, closing an electronic water pump of the cooling loop;
and when the target controller is in a disconnection state currently and the duration of the target controller maintaining the disconnection state exceeds a preset time threshold, closing the electronic water pump of the cooling loop.
In a second aspect, an embodiment of the present application provides a cooling system control apparatus provided in an electronic device, the apparatus including:
the CAN transceiver module is used for obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time;
the electronic water pump PWM table look-up module is used for determining the target flow rate of the cooling liquid in the cooling loop according to the conduction state of the target controller and the temperature change value of the at least one controller to be cooled;
and the output module is used for controlling the cooling circuit to execute a cooling process based on the target flow rate.
In a third aspect, an embodiment of the present application provides an apparatus, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing the method provided in the first aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing computer instructions that cause a computer to perform the method provided in the first aspect.
It should be understood that, the second to fourth aspects of the embodiments of the present application are consistent with the technical solutions of the first aspect of the embodiments of the present application, and the beneficial effects obtained by each aspect and the corresponding possible implementation manner are similar, and are not repeated.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present specification, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conventional electrically controlled cooling system;
FIG. 2 is a flowchart illustrating steps of a cooling system control method according to an embodiment of the present application;
FIG. 3 is a flowchart illustrating steps of another cooling system control method according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating steps of a control method of a cooling system according to an embodiment of the present application;
FIG. 5 is a flow chart illustrating an exemplary implementation of a cooling system control method of the present application;
FIG. 6 is a functional block diagram of a cooling system control apparatus according to an embodiment of the present application;
FIG. 7 is a schematic diagram of an application of the cooling system control device of the present application in one example;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
[ detailed description ] of the application
For a better understanding of the technical solutions of the present specification, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are only some, but not all, of the embodiments of the present description. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present disclosure.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Common schemes for cooling the controller in the heat management of the new energy automobile comprise air cooling, liquid cooling and the like, namely, the cooling liquid of a cooling system is driven to circulate by an electronic water pump, and then the cooling liquid is radiated by a radiator and a fan; fig. 1 is a schematic diagram of a common electrically controlled cooling system, in which a cooling liquid is circulated mainly by an electronic water pump, and then is cooled by a fan after reaching a radiator. The cooling system control method provided by the embodiment of the application performs unified regulation and control of mode switching on the electric control cooling system shown in fig. 1, and avoids system loss caused by frequent initiation of cooling requests on the cooling system or closing of the cooling system by different controllers.
The cooling system control method provided by the embodiment of the application can be applied to electronic equipment, wherein the electronic equipment can comprise a remote communication terminal (Tbox), an electronic controller unit (Electronic Control Unit, ECU) and the like. Based on the cooling system control method provided by the embodiment of the application, the parameters of each controller are collected, and the opening, closing, mode switching and adjustment of the cooling system are uniformly judged, so that the cooling mode of the cooling system is controlled.
Fig. 2 is a flowchart of a cooling system control method according to an embodiment of the present application, where, as shown in fig. 2, the steps include:
Step S21: obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time period.
The target controller is a controller in which the temperature rises to the requested cooling threshold value within a period of time, and the preset period of time may be a preset extremely short time.
In one example of the application, the target controller may be an IGBT, the IGBT is a core power element of the motor controller, the IGBT generates a great amount of heat loss due to long-time operation and frequent switching, especially when under a severe driving condition (for example, in an acceleration driving stage), the temperature of the IGBT may rise rapidly in a short time, according to test experience, the temperature may rise by 60 ℃ within 3s, if electric control cooling is not in time, the IGBT is easy to overheat to cause power degradation or power interruption, so the application detects the on state of the target controller according to the objective fact that the temperature of the target controller may be fast in a short time, and when the target controller is on, the cooling system is started in advance and is controlled to be ready, so as to avoid the problem of power degradation or power interruption caused by untimely response of the cooling system.
The controller to be cooled may include: OBC, IGBT, DC-DC, etc. When the OBC begins to work during slow charging, the temperature gradually rises, and after the temperature exceeds a threshold value, the OBC has a cooling requirement; during fast charging, the DC-DC is operated, the temperature is gradually increased, and after exceeding a threshold value, the cooling requirement exists.
Step S22: and determining the target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
According to the embodiment of the application, the conduction state of the target controller and the factors of the temperature change value of each controller to be cooled are integrated, and the flow rate of the cooling liquid in the cooling loop is judged, so that the cooling loop can adjust the flow rate of the cooling liquid flowing through the controller in unit time according to the target flow rate, and the cooling of the controller is controlled.
If the target controller is in a conducting state, driving the cooling liquid to circulate in the cooling loop at a rated flow rate; if the temperature change value of a certain to-be-cooled controller starts to be increased, a faster target flow rate can be determined, and if the temperature change value of the to-be-cooled controller is not increased, the rated flow rate can be determined as the target flow rate.
The rated flow rate can be a calibrated flow rate which can enable the cooling liquid of the electric control cooling circuit to circulate.
Step S23: and controlling the cooling loop to execute a cooling process based on the target flow rate.
And monitoring the temperature change of each controller, unifying the standard of complex logic of different controllers requesting cooling in different working modes and working scenes, and controlling the flow of the cooling liquid in unit time of the cooling circuit according to the temperature change condition, thereby regulating and controlling the cooling efficiency of the cooling circuit.
Fig. 3 is a flowchart illustrating steps of another cooling system control method according to an embodiment of the present application, where as shown in fig. 3, the steps include:
step S31: and obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled.
The temperature change value is the difference between the current real-time temperature of the controller and the corresponding cooling request threshold of the controller. Illustratively, the OBC rises to T at temperature 1 The temperature change value of the OBC is the current real-time temperature and T of the OBC 1 Difference in C.
Step S32: and obtaining the current accelerator opening change value of the vehicle at the current time.
The driving intensity is pre-judged in advance by detecting the change value of the accelerator opening, the faster target flow rate is determined when the current change value of the accelerator opening is larger, and the slower target flow rate is determined when the current change value of the accelerator opening is smaller. Based on the phenomenon that the current accelerator opening change value is large, the current running working condition is predicted to be complex, the IGBT can be rapidly increased in a very short time, and therefore the current accelerator opening change value is synthesized, and the cold flow of the cooling loop in unit time is judged.
Step S33: and determining the target flow rate of the cooling liquid in the cooling loop according to the current accelerator opening change value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
Step S34: and controlling the cooling loop to execute a cooling process based on the target flow rate.
Another embodiment of the present application provides an implementation manner of step S33, in which, in view of controlling the rotation speed of the electronic water pump in the cooling circuit by pulse width modulation (Pulse Width Modulation, PWM), the flow rate of the coolant in the cooling circuit is controlled by judging the PWM.
Step S33 includes substeps S331 to S334:
step S331: and obtaining a first PWM corresponding to the conducting state of the target controller.
When the target controller is detected to be in a conducting state, a first PWM (pulse width modulation) is obtained to be PWM 1=A, wherein A is a calibrated minimum electronic water pump PWM which can enable the cooling liquid of the electric control cooling circuit to circulate.
Step S332: searching a second PWM corresponding to the target temperature change value in a pre-calibrated corresponding relation between the temperature change value and the electronic water pump pulse width modulation PWM; the target temperature variation value is the largest of the temperature variation values of the at least one controller to be cooled.
The corresponding relationship between the temperature variation value calibrated in advance and the pulse width modulation PWM of the electronic water pump according to the embodiment of the present application may be shown in table 1, where the second PWM is represented as PWM2, table 1:
| Δ(℃) | ＜T 0 | [T 0 ，T 1 ) | [T 1 ，T 2 ) | ≥T 2 |
| pwm2(％) | 0 | a 1 | a 2 | a 3 |
The target temperature change value Δ in table 1 is the temperature change value of the controller having the largest temperature change. For example, Δ=max (Δ1, Δ2, Δ3), Δ1 is the temperature change value of the IGBT, Δ2 is the temperature change value of the OBC, and Δ3 is the temperature change value of the DC-DC. When the target temperature change value falls within the interval [ T ] 0 ，T 1 ) When pwm 2=a is determined 1 。
The embodiment of the application also sets a first preset return difference value according to the response speed of the controller to the temperature, reserves a certain delay temperature when the temperature change value falls back, and reserves response time for the temperature change again, thereby avoiding frequent jump and start-stop of the water pump PWM caused by the increase of the temperature change value again.
Setting a first preset return difference value according to the matching degree of the response speed of the controller to the temperature change and the temperature change trend;
in the process of determining the target flow rate of the cooling liquid in the cooling loop according to the temperature change value of at least one to-be-cooled controller, a first preset return difference value can be superimposed on the temperature, and then the corresponding PWM2 is searched in the corresponding relationship between the pre-calibrated temperature change value and the pulse width modulation PWM of the electronic water pump.
For example, assuming that the highest temperature change value in IGBT, OBC, DC-DC is OBC, the first preset difference value is C, the temperature change value delta is AA, and AA is greater than T 0 And is less than T 1 Based on table 1, pwm2=a was obtained 1 The highest temperature change value in IGBT, OBC, DC-DC is detected again and is OBC, the temperature change value delta is AB, and AB is smaller than T 0 To avoid frequent jump of the electronic water pump PWM, C is superimposed on AB, and AB+C is determined to be greater than T 0 And is less than T 1 Based on table 1, pwm2=a was obtained 1 In other words, the flow rate obtained by controlling the rotation speed of the electronic water pump at pwm2 is still unchanged.
Different first preset back differences may be pre-calibrated for different threshold ranges, e.g. temperature change values from [ T ] 1 ，T 2 ) The interval falls back to the interval [ T ] 0 ，T 1 ) The first preset difference value can be set as C 1 The temperature change value is more than or equal to T 2 The interval falls back to the interval [ T ] 1 ，T 2 ) The first preset difference value can be set as C 2 。
If there are other controllers to be cooled in the electric control system, the difference between the working temperature of the newly added controller and the cooling request threshold is newly increased according to the above table 1.
Step S333: and searching a third PWM corresponding to the current throttle opening change value according to the pre-calibrated throttle opening change value and the PWM corresponding relation of the electronic water pump.
In one example of the present application, the third PWM may be recorded as PWM3, and the current throttle opening variation value isThe corresponding relationship between the pre-calibrated accelerator opening change value and the electronic water pump pulse width modulation PWM can be shown in table 2, and table 2:
The current throttle opening change value is obtained, and the corresponding pwm3 (%) can be obtained by looking up table 2.
Step S334: the maximum one of the first PWM, the second PWM, and the third PWM is selected as a target PWM that controls the target flow rate.
The embodiment of the application also sets a second preset return difference value according to the association of the accelerator opening and the driving intensity, predicts the trend of the accelerator opening change according to the condition of the accelerator opening change in a period of time before the current time so as to predict the driving intensity, thereby predicting the temperature change degree of the controller, and starting the electronic water pump to the predicted rotating speed in advance according to the trend of the accelerator opening change so as to avoid the loss caused by untimely response of the cooling system.
Predicting a working condition change trend according to the current accelerator opening change value;
predicting an increasing value of the current accelerator opening change value within a preset time length according to the working condition change trend to obtain a second preset return difference value; superposing the second preset return difference value on the current accelerator opening change value to obtain a predicted accelerator opening value; and determining the target flow rate of the cooling liquid in the cooling loop according to the predicted accelerator opening value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
After the target PWM for controlling the target flow rate is obtained, a specific way to perform the cooling process by controlling the cooling circuit based on the target flow rate may be: and controlling an electronic water pump through the target PWM to enable cold liquid of the cooling loop to circulate according to the target flow rate.
Based on the setting of the first preset return difference value for the temperature change value and the setting of the second preset return difference value for the current accelerator opening change value mentioned in the above embodiments, in one example of the present application, selecting the largest one of the first PWM, the second PWM, and the third PWM as the target PWM for controlling the target flow rate may be: and selecting the maximum one of the first PWM, the second PWM overlapped with the first preset difference value and the third PWM overlapped with the second preset difference value as the target PWM for controlling the target flow rate.
Illustratively, detecting that the target controller IGBT is in an on state, determining that the first PWM is a; the controller DC-DC with the largest temperature change value detected in IGBT, OBC, DC-DC has a temperature change value delta 4 Searching and obtaining delta based on a pre-calibrated temperature change value and an electronic water pump pulse width modulation PWM corresponding relation 4 The corresponding second PWM is a 2 Detecting that the accelerator opening value is m, and the third PWM corresponding to the accelerator opening value m is 40%, wherein a is as follows 2 A is greater than 40%, and a target PWM for controlling the target flow rate is determined as a 2 A can be used 2 The PWM of the electronic water pump is controlled to reach the corresponding rotating speed, so that the cooling liquid is cooled by a 2 The corresponding flow rate is circulated in the cooling system.
In the cooling system control method according to the embodiment of the present application, a corresponding control manner is further set based on the electronic fan of the cooling system, and fig. 4 is a flowchart of steps of the cooling system control method according to the embodiment of the present application, as shown in fig. 4, in which, the opening of the electronic fan may be controlled in addition to the target flow rate of the cooling circuit, so as to adjust the cooling efficiency of the electronic fan on the cooling liquid.
Step S41: and obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled.
Step S42: obtaining the current temperature of the cooling liquid.
Step S43: and searching a target electronic fan opening corresponding to the current temperature of the cooling liquid in a preset corresponding relation between the electronic fan gear and the temperature of the cooling liquid.
An example of the present application proposes that a preset fan opening table may be queried to obtain a target electronic fan opening. Table 3 is a correspondence relationship between a gear position of an exemplary electronic fan of the present application and a temperature of a cooling liquid, table 3:
| T_coolant(℃) | ＜20 | [20，35) | ≥35 |
| Gear position | Closing | Low speed | Gao Su |
The current temperature of the coolant is 25, and the fan opening degree can be obtained at a low speed.
Step S44: and determining the target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
Step S45: and controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
In consideration of the influence of resistance of the opening of the fan under high-speed running of the vehicle, the embodiment of the application also provides a mode for adjusting the opening of the electronic fan.
Obtaining the maximum value of the opening of the electronic fan allowed by the vehicle at the current running speed;
controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening comprises the following steps:
and when the target electronic fan opening is smaller than the maximum electronic fan opening, controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
And when the target electronic fan opening is larger than the electronic fan opening maximum value, controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the electronic fan opening maximum value.
Illustratively, when the vehicle speed is greater than 50km/h, the maximum gear of the fan is low, and when the vehicle speed is greater than 100km/h, the fan is turned off; when the detected speed is greater than 50km/h, the temperature of the cold liquid is more than 35 ℃, the opening of the target electronic fan is high, the maximum value of the opening of the electronic fan corresponding to the speed is closed, and the operation of closing the electronic fan is executed.
The embodiment of the application also provides an opening and closing triggering mode of the cooling system, and fig. 5 is a flowchart of an example execution cooling system control method of the application, and as shown in fig. 5, the embodiment of the application uniformly sets logic for opening or closing the cooling system aiming at the complex cooling request phenomenon of each controller.
K11: and judging whether the cooling requirement exists. The CAN signal CAN be used for receiving an electric control IGBT on-off state signal, an electric control IGBT temperature signal, a DCDC temperature signal, an OBC temperature signal, an accelerator pedal opening signal and a vehicle speed signal, and sending out state signals such as an electric control cooling mode; judging whether cooling requirements exist or not according to the received signals, and judging a cooling mode subsequently.
The ways of determining whether there is a cooling demand include:
obtaining a temperature of a cooling fluid in the cooling circuit;
and when the conduction state of the target controller is detected to be on and the temperature of the cooling liquid reaches the pre-request threshold value of the target controller, starting an electronic water pump of the cooling loop.
In view of the target controller whose temperature is suddenly increased, the embodiment of the application starts the cooling system when the non-conducting state of the target controller is detected; particularly, the embodiment of the application also increases the pre-request threshold value for the target controller, and mainly aims at the situation that the electric control target controller such as IGBT in a low-temperature environment (such as less than 0 ℃) cannot generate over-temperature, and loop cooling liquid does not need to be circulated in advance.
By adopting the mode, the loop cooling liquid is circulated in advance, the driving intensity is pre-judged in advance by detecting the opening change rate of the accelerator pedal in real time, and the problem that the temperature is suddenly increased due to frequent on-off of the electric control IGBT, and the electric control IGBT is overtemperature due to untimely electric control cooling response is solved.
The means for determining whether there is a cooling demand further comprises:
when the temperature of any controller to be cooled exceeds a corresponding request cooling threshold value, an electronic water pump of the cooling loop is started;
for example, assume that the request cooling threshold of DCDC is t d The cooling request threshold of the OBC is T o The cooling threshold of the IGBT is t K The temperature of DCDC is detected to exceed t d And starting the electronic water pump of the cooling loop.
K12: if the cooling is judged to be needed, the cooling system is started.
K13: PWM of the electronic water pump is calculated according to the temperature of each controller, and the opening of the electronic fan is calculated according to the temperature of the cooling liquid.
K14: and detecting the temperature of each controller and the conduction state of the target controller, and judging whether the cooling system exit condition is met.
K15: and if the cooling system exit condition is met, closing the cooling system.
When the temperature of any to-be-cooled controller is lower than the corresponding request cooling threshold value after being overlapped by the first preset return difference value, closing an electronic water pump of the cooling loop; and when the target controller is in a disconnection state currently and the duration of the target controller maintaining the disconnection state exceeds a preset time threshold, closing the electronic water pump of the cooling loop.
K16: and turning off the electronic water pump and the electronic fan.
In one example of the application, assuming an OBC request cooling threshold of 40 ℃, a DC-DC request cooling threshold of 60 ℃, an electronically controlled IGBT pre-request threshold of 30 ℃, a request cooling threshold of 55 ℃; when cooling, the expected temperature of the cooling liquid of the electric control loop is 20 ℃; the minimum PWM for circulating the cooling liquid of the electric control cooling circuit is 30%, i.e. pwm1=30% when the electric control IGBT is turned on and the temperature exceeds 30 ℃, the first preset difference is 5 ℃, and the second preset difference is 20 ℃.
The judging conditions for the gear of the electronic fan comprise:
when the speed of the vehicle is greater than 50km/h, the maximum gear of the fan is low speed
When the speed of the vehicle is greater than 100km/h, the fan is turned off
The corresponding relation between the pre-calibrated temperature change value and the electronic water pump pulse width modulation PWM is shown in the table 4, and the table 4 is as follows:
| Δ(℃) | ＜0 | [0,15) | [15,25) | ≥35 |
| pwm2(％) | 0 | 60 | 80 | 100 |
the corresponding relation between the pre-calibrated throttle opening change value and the electronic water pump pulse width modulation PWM can be as follows
Table 5 shows, table 5:
the correspondence between the electronic fan gear and the coolant temperature is shown in table 3.
The implementation flow of the control method of the cooling system is exemplified by two working conditions of high Wen Man charging (OBC temperature rise) and high Wen Hangche (initial vehicle speed 50km/h, and then continuous acceleration to the vehicle speed exceeding 100 km/h);
high temperature environment (environment temperature > 35 ℃), slow charge condition:
(1) After OBC works, the temperature starts to rise, but DCDC and the electric control IGBT do not work, and the temperature is supposed to be maintained at about 30 DEG C
(2) When the OBC temperature is detected to exceed 40 ℃, the electric control cooling system mode is set ON.
(3) Delta=0 ℃, calculating an electronic water pump PWM; pwm=max (PWM 1, PWM2, PWM 3) =60%; the electric control IGBT pre-cooling condition is not met, pwm1=0, and pwm2=60% is obtained according to the delta lookup table 4; and looking up table 5 according to the current throttle opening value to obtain pwm 3=0.
(4) The charging working condition is that the vehicle speed is 0, and the highest gear of the electronic fan is high speed; if the temperature T_coolant is 40 ℃, the electronic fan is at a high speed
(5) If the OBC temperature continuously rises to 55 ℃, delta=15 ℃, and the electric control water pump PWM is adjusted up to 80%
(6) If the temperature T_coolant is reduced to 30 ℃, the electronic fan gear is adjusted down to a low speed.
Driving working conditions, wherein the speed of the vehicle is assumed to be more than 60km/h;
(1) If the initial temperature of the electric control IGBT is 35 ℃, the OBC and the DCDC do not work, and the temperature is assumed to be maintained at 30 ℃;
(2) When the electric control IGBT is detected to be in a conducting state and the temperature of the electric control IGBT exceeds a pre-cooling threshold value, the electric control cooling mode is set to be ON;
(3) And calculating PWM of the electronic water pump, wherein PWM=max (PWM 1, PWM2, PWM 3) =30%, the pre-cooling condition of the electronic control IGBT is met, PWM 1=30%, PWM 2=0 is obtained according to delta lookup table 4, and PWM 3=0 is obtained according to current accelerator opening value lookup table 5.
(4) Judging the gear of the electronic fan, wherein the speed is 60km/h and more than 50km/h, and the maximum gear of the fan is low; if the temperature T_coolant of the cooling liquid is 40 ℃, checking a table to obtain that the gear of the fan is high; but the maximum gear is limited to be low speed, and the electronic fan is finally controlled to run at low speed.
(5) When continuous acceleration occurs, the throttle opening change value is more than 80, and the PWM of the electric control water pump is adjusted to 100%.
(6) And if the continuous acceleration leads the speed of the vehicle to exceed 100km/h, controlling the electronic fan to be turned off.
Fig. 6 is a functional block diagram of a cooling system control device according to an embodiment of the present application, where the cooling system control device is provided in an electronic apparatus, as shown in fig. 6, and the device includes:
the CAN transceiver module 61 is used for obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time;
the electronic water pump PWM lookup module 62 is configured to determine a target flow rate of the cooling liquid in the cooling circuit according to the on state of the target controller and the temperature variation value of the at least one controller to be cooled;
an output module 63 for controlling the cooling circuit to perform a cooling flow based on the target flow rate.
The cooling system control device provided by the embodiment shown in fig. 6 may be used to implement the technical solutions of the method embodiments shown in fig. 1 to 7 in the present specification, and the principle and technical effects thereof may be further described with reference to the related descriptions in the method embodiments.
Optionally, the apparatus further comprises:
the accelerator opening obtaining module is used for obtaining a current accelerator opening change value of the vehicle at the current time;
the electronic water pump PWM table lookup module is specifically configured to determine a target flow rate of the cooling liquid in the cooling loop according to the current throttle opening change value, the conduction state of the target controller, and the temperature change value of the at least one controller to be cooled.
Optionally, the electronic water pump PWM lookup module includes:
the first PWM obtaining submodule is used for obtaining a first PWM corresponding to the on state of the target controller;
the second PWM obtaining sub-module is used for finding a second PWM corresponding to the target temperature change value in a pre-calibrated corresponding relation between the temperature change value and the pulse width modulation PWM of the electronic water pump; the target temperature variation value is the largest of the temperature variation values of the at least one controller to be cooled;
the third PWM obtaining sub-module is used for finding out the corresponding third PWM of the current throttle opening change value according to the corresponding relation between the pre-calibrated throttle opening change value and the electronic water pump pulse width modulation PWM;
a selecting sub-module for selecting the maximum one of the first PWM, the second PWM, and the third PWM as a target PWM for controlling the target flow rate;
the output module is specifically used for outputting the target PWM, and controlling the electronic water pump through the target PWM so as to enable the cold liquid of the cooling loop to circulate according to the target flow rate.
Optionally, the apparatus further comprises:
the water temperature acquisition module is used for acquiring the temperature of the cooling liquid in the cooling loop;
and the electronic control cooling mode judging module is used for starting the electronic water pump of the cooling loop when the conduction state of the target controller is detected to be on and the temperature of the cooling liquid reaches the pre-request threshold value of the target controller.
Optionally, the apparatus further comprises:
the return difference value setting module is used for setting a first preset return difference value according to the matching degree of the response speed of the controller to the temperature change and the temperature change trend;
the electronic water pump PWM table look-up module comprises:
the first superposition sub-module is used for superposing the first preset return difference value on the temperature change value to obtain a temperature delay change value;
and the first flow rate determining submodule is used for determining the target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature delay change value.
Optionally, the apparatus further comprises:
the trend prediction module is used for predicting the change trend of the working condition according to the current accelerator opening change value;
the increment value prediction module is used for predicting an increment value of the current accelerator opening change value within a preset time length according to the working condition change trend to obtain a second preset return difference value;
the electronic water pump PWM table look-up module comprises:
the second superposition sub-module is used for superposing the second preset return difference value on the current accelerator opening change value to obtain a predicted accelerator opening value;
and the second flow rate determining submodule is used for determining the target flow rate of the cooling liquid in the cooling loop according to the predicted accelerator opening value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
Optionally, the apparatus further comprises:
the temperature parameter obtaining module is used for obtaining the current temperature of the cooling liquid;
the electronic fan gear judging module is used for searching a target electronic fan opening corresponding to the current temperature of the cooling liquid in a preset corresponding relation between the electronic fan gear and the temperature of the cooling liquid;
the output module is specifically configured to output the target electronic fan opening, and control the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
Optionally, the apparatus further comprises:
the maximum opening value obtaining module is used for obtaining the maximum opening value of the electronic fan allowed by the vehicle at the current running speed;
the output module is specifically configured to control the electronic fan to cool the coolant based on the target flow rate according to the target electronic fan opening when the target electronic fan opening is smaller than the maximum electronic fan opening.
Optionally, the apparatus further comprises:
the electronic control cooling mode judging module is used for starting the electronic water pump of the cooling loop when the temperature of any to-be-cooled controller exceeds a corresponding request cooling threshold value;
The first loop closing module is used for closing an electronic water pump of the cooling loop when the temperature of any to-be-cooled controller is lower than the corresponding request cooling threshold value after being overlapped with the first preset loop difference value;
and the second loop closing module is used for closing the electronic water pump of the cooling loop when the target controller is in a disconnection state currently and the duration of maintaining the disconnection state of the target controller exceeds a preset time threshold.
Fig. 7 is a schematic diagram of an application of the cooling system control device provided by the application in an example, as shown in fig. 7, the cooling system control device may include a water temperature acquisition module 71, a CAN transceiver module 72, where the water temperature acquisition module is used to acquire a temperature of a cooling liquid in a cooling loop, and the CAN transceiver module is used to receive an electric control IGBT on-off state signal, an electric control IGBT temperature signal, a DCDC temperature signal, an OBC temperature signal, an accelerator pedal opening signal, a vehicle speed signal, and send out status signals such as an electric control cooling system mode. The water temperature acquisition module 71 and the CAN transceiver module 72 are both connected with the electric control cooling mode judgment module 73, and the electric control cooling mode judgment module 73 is used for judging whether the cooling system is started or not;
the electronic control cooling mode judging module 73 is connected with the electronic water pump PWM table look-up module 74, and the electronic water pump PWM table look-up module 74 is used for looking up a table according to the temperature of each controller to obtain the PWM of the electronic water pump, so that the flow rate of cooling liquid of the cooling loop is controlled;
The electronic water pump PWM table look-up module 74 is connected with the electronic fan gear judging module 75, the electronic fan gear judging module 75 is used for judging the opening of the electronic fan according to the cooling temperature, so that the cooling degree of the cooling liquid is determined, the electronic fan gear judging module 75 is connected with the output module 76, the output module 76 is specifically used for outputting target PWM and target electronic fan opening, and when the target electronic fan opening is smaller than the maximum value of the electronic fan opening, the electronic fan is controlled to cool the cooling liquid based on the target flow velocity according to the target electronic fan opening.
The device provided by the above-described embodiment is used for executing the technical scheme of the above-described method embodiment, and its implementation principle and technical effects may further refer to the related description in the method embodiment, which is not repeated herein.
The device provided by the above-described embodiment may be, for example: a chip or a chip module. The device provided by the above-described embodiment is used for executing the technical scheme of the above-described method embodiment, and its implementation principle and technical effects may further refer to the related description in the method embodiment, which is not repeated herein.
With respect to each module/unit included in each apparatus described in the above embodiments, it may be a software module/unit, or may be a hardware module/unit, or may be a software module/unit partially, or a hardware module/unit partially. For example, for each device applied to or integrated in a chip, each module/unit included in the device may be implemented in hardware such as a circuit, or at least part of the modules/units may be implemented in software program, where the software program runs on a processor integrated in the chip, and the rest of the modules/units may be implemented in hardware such as a circuit; for each device applied to or integrated in the chip module, each module/unit contained in the device may be implemented in a hardware manner such as a circuit, and different modules/units may be located in the same component (e.g. a chip, a circuit module, etc.) of the chip module or different components, or at least part of the modules/units may be implemented in a software program, where the software program runs on a processor integrated in the chip module, and the rest of the modules/units may be implemented in a hardware manner such as a circuit; for each device applied to or integrated in the electronic terminal device, each module/unit included in the device may be implemented in hardware such as a circuit, and different modules/units may be located in the same component (for example, a chip, a circuit module, etc.) or different components in the electronic terminal device, or at least part of the modules/units may be implemented in a software program, where the software program runs on a processor integrated in the electronic terminal device, and the remaining (if any) part of the modules/units may be implemented in hardware such as a circuit.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device 800 includes a processor 810, a memory 811, and a computer program stored in the memory 811 and capable of running on the processor 810, where the steps in the foregoing method embodiments are implemented when the processor 810 executes the program, and the electronic device according to the embodiment may be used to execute the technical solutions of the foregoing method embodiments, and the implementation principles and technical effects may be further referred to in the related descriptions of the method embodiments and are not repeated herein.
Embodiments of the present application provide a computer-readable storage medium storing computer instructions that cause a computer to execute the cooling system control method provided in the embodiments shown in fig. 1 to 5 of the present specification. Computer-readable storage media may refer to non-volatile computer storage media.
Any combination of one or more computer readable media may be utilized as the above-described computer readable storage media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (erasable programmable read only memory, EPROM) or flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for the present specification may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a local area network (local area network, LAN) or a wide area network (wide area network, WAN), or may be connected to an external computer (e.g., connected via the internet using an internet service provider).
The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
In the description of embodiments of the present application, a description of reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present specification, the meaning of "plurality" means at least two, for example, two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present specification in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present specification.
Depending on the context, the word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to detection". Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
In the several embodiments provided in this specification, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the elements is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
In addition, each functional unit in each embodiment of the present specification may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The foregoing description of the preferred embodiments is provided for the purpose of illustration only, and is not intended to limit the scope of the disclosure, since any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the disclosure are intended to be included within the scope of the disclosure.
Claims (12)
1. A cooling system control method, characterized by being applied to an electronic apparatus, comprising:
obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time period;
determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one controller to be cooled;
and controlling the cooling loop to execute a cooling process based on the target flow rate.
2. The method according to claim 1, wherein the method further comprises:
obtaining a current accelerator opening change value of a vehicle at the current time;
determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature of the at least one controller to be cooled, wherein the method comprises the following steps of:
and determining the target flow rate of the cooling liquid in the cooling loop according to the current accelerator opening change value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
3. The method according to claim 2, wherein determining the target flow rate of the coolant in the cooling circuit based on the accelerator opening variation value, the on state of the target controller, and the temperature variation value of the at least one controller to be cooled, comprises:
Obtaining a first PWM corresponding to the conduction state of the target controller;
searching a second PWM corresponding to the target temperature change value in a pre-calibrated corresponding relation between the temperature change value and the electronic water pump pulse width modulation PWM; the target temperature variation value is the largest of the temperature variation values of the at least one controller to be cooled;
finding a third PWM corresponding to the current throttle opening change value according to the corresponding relation between the pre-calibrated throttle opening change value and the electronic water pump pulse width modulation PWM;
selecting the largest one of the first PWM, the second PWM, and the third PWM as a target PWM for controlling the target flow rate;
controlling the cooling circuit to perform a cooling flow based on the target flow rate, comprising:
and controlling an electronic water pump through the target PWM to enable cold liquid of the cooling loop to circulate according to the target flow rate.
4. The method of claim 1, wherein prior to determining the target flow rate of the coolant in the cooling circuit based on the on state of the target controller and the temperature change value of the at least one controller to be cooled, the method further comprises:
obtaining a temperature of a cooling fluid in the cooling circuit;
and when the conduction state of the target controller is detected to be on and the temperature of the cooling liquid reaches the pre-request threshold value of the target controller, starting an electronic water pump of the cooling loop.
5. The method according to claim 1, wherein the method further comprises:
setting a first preset return difference value according to the matching degree of the response speed of the controller to the temperature change and the temperature change trend;
determining a target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature change value of the at least one to-be-cooled controller, wherein the method comprises the following steps:
superposing the first preset return difference value on the temperature change value to obtain a temperature delay change value;
and determining the target flow rate of the cooling liquid in the cooling loop according to the conducting state of the target controller and the temperature delay change value.
6. The method according to claim 2, wherein the method further comprises:
predicting a working condition change trend according to the current accelerator opening change value;
predicting an increasing value of the current accelerator opening change value within a preset time length according to the working condition change trend to obtain a second preset return difference value;
determining a target flow rate of the cooling liquid in the cooling loop according to the current accelerator opening change value, the conducting state of the target controller and the temperature change value of the at least one to-be-cooled controller, wherein the method comprises the following steps:
Superposing the second preset return difference value on the current accelerator opening change value to obtain a predicted accelerator opening value;
and determining the target flow rate of the cooling liquid in the cooling loop according to the predicted accelerator opening value, the conducting state of the target controller and the temperature change value of the at least one controller to be cooled.
7. The method according to claim 1, wherein the method further comprises:
obtaining a current temperature of the cooling liquid;
searching a target electronic fan opening corresponding to the current temperature of the cooling liquid in a preset corresponding relation between the electronic fan gear and the temperature of the cooling liquid;
controlling the cooling circuit to perform a cooling flow based on the target flow rate, comprising:
and controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
8. The method of claim 7, wherein the method further comprises:
obtaining the maximum value of the opening of the electronic fan allowed by the vehicle at the current running speed;
controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening comprises the following steps:
and when the target electronic fan opening is smaller than the maximum electronic fan opening, controlling the electronic fan to cool the cooling liquid based on the target flow rate according to the target electronic fan opening.
9. The method of claim 5, wherein prior to determining the target flow rate of the coolant in the cooling circuit based on the on state of the target controller and the temperature change value of the at least one controller to be cooled, the method further comprises:
when the temperature of any controller to be cooled exceeds a corresponding request cooling threshold value, an electronic water pump of the cooling loop is started;
when the temperature of any to-be-cooled controller is lower than the corresponding request cooling threshold value after being overlapped by the first preset return difference value, closing an electronic water pump of the cooling loop;
and when the target controller is in a disconnection state currently and the duration of the target controller maintaining the disconnection state exceeds a preset time threshold, closing the electronic water pump of the cooling loop.
10. A cooling system control apparatus provided in an electronic device, the apparatus comprising:
the CAN transceiver module is used for obtaining the conduction state of the target controller and the temperature change value of at least one controller to be cooled; the target controller is a controller with the temperature rising to a request cooling threshold value in a preset time;
the electronic water pump PWM table look-up module is used for determining the target flow rate of the cooling liquid in the cooling loop according to the conduction state of the target controller and the temperature change value of the at least one controller to be cooled;
And the output module is used for controlling the cooling circuit to execute a cooling process based on the target flow rate.
11. An apparatus, comprising:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein,
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1-9.
12. A computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 9.
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