CN118076064A - Cooling flow control method, controller and vehicle - Google Patents
Cooling flow control method, controller and vehicle Download PDFInfo
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- CN118076064A CN118076064A CN202410201579.1A CN202410201579A CN118076064A CN 118076064 A CN118076064 A CN 118076064A CN 202410201579 A CN202410201579 A CN 202410201579A CN 118076064 A CN118076064 A CN 118076064A
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- 238000001816 cooling Methods 0.000 title claims abstract description 308
- 238000000034 method Methods 0.000 title claims abstract description 60
- 239000000110 cooling liquid Substances 0.000 claims abstract description 111
- 238000007599 discharging Methods 0.000 claims description 19
- 238000012360 testing method Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 16
- 238000013461 design Methods 0.000 claims description 16
- 239000002826 coolant Substances 0.000 claims description 14
- 238000004088 simulation Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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Abstract
The application provides a cooling flow control method, a controller and a vehicle, when the vehicle is in a preset mode, if the temperature of a target product is higher than a first preset temperature, judging whether the output power of the target product is higher than the first preset power, if so, acquiring a first minimum cooling flow according to the corresponding relation between the output power and the minimum cooling flow, if not, judging whether the temperature of cooling liquid is higher than a second preset temperature, and if so, acquiring a second minimum cooling flow according to the corresponding relation between the temperature of cooling liquid and the minimum cooling flow, and if not, determining that the cooling flow is zero. According to the scheme, the cooling flow is controlled based on the corresponding relation between the output power and the minimum cooling flow and the corresponding relation between the temperature of the cooling liquid and the minimum cooling flow, so that the management control of the cooling flow under different working conditions, different working modes, different power loads and other dimensions is realized, and the energy consumption of the product in use is reduced.
Description
Technical Field
The application relates to the field of new energy automobiles, in particular to a cooling flow control method, a controller and a vehicle.
Background
The vehicle-mounted power supply is a core part for energy conversion in the new energy automobile and mainly comprises a direct current-direct current (DCDC) converter and a vehicle-mounted charger (OBC), wherein the direct current-direct current converter is used for transferring energy from a high-voltage battery pack to a low-voltage storage battery to supply power for low-voltage electric equipment of the automobile. The vehicle-mounted charger converts Alternating Current (AC) from a power grid into Direct Current (DC) to charge a power battery.
With the rapid iteration and popularization and application of new energy technology and products, how to reduce energy consumption is an increasingly focused problem for the energy consumption control of direct current-direct current converters and vehicle-mounted chargers.
The applicant finds that the cooling flow redundancy request exists in the practical product application after collecting and analyzing the cooling flow of the vehicle-mounted charger and the direct current-direct current converter, so that the energy flow is wasted.
Disclosure of Invention
The application provides a cooling flow control method, a controller and a vehicle, which are used for carrying out fine management on cooling flow and reducing energy consumption.
In a first aspect, the present application provides a cooling flow control method for a vehicle including an integrated system of an onboard charger and a dc-dc converter, the method comprising:
When the vehicle is in a preset mode, if the temperature of the target product is greater than a first preset temperature, judging whether the output power of the target product is greater than the first preset power;
if yes, acquiring a first minimum cooling flow according to the corresponding relation between the output power and the minimum cooling flow;
If not, judging whether the temperature of the cooling liquid is greater than a second preset temperature, acquiring a second minimum cooling flow according to the corresponding relation between the temperature of the cooling liquid and the minimum cooling flow when the temperature of the cooling liquid is greater than the second preset temperature, and determining that the cooling flow is zero when the temperature of the cooling liquid is less than or equal to the second preset temperature.
Optionally, the method further comprises:
If the temperature of the target product is less than or equal to a first preset temperature, judging whether the temperature change rate of the target product is greater than a preset change rate;
if yes, carrying out abnormal alarm, otherwise, determining that the cooling flow is zero.
Optionally, the preset mode includes at least one of the following: a charging mode, a single dc-dc converter mode, and a discharging mode;
the charging mode indicates that the vehicle-mounted charger is in a charging state, the single direct current-direct current converter mode indicates that the direct current-direct current converter is in a working state, and the discharging mode indicates that the vehicle-mounted charger is in a discharging state;
When the vehicle is in the charging mode or the discharging mode, the target product is the vehicle-mounted charger; when the vehicle is in the single DC-DC converter mode, the target product is the DC-DC converter.
Optionally, before the first minimum cooling flow is obtained according to the correspondence between the output power and the minimum cooling flow, the method further includes:
Analyzing the vehicle and determining the maximum output power corresponding to a vehicle-mounted charger in the vehicle;
Based on the topology design circuit principle of the vehicle-mounted charger, selecting a corresponding first power device according to the circuit principle;
Testing the minimum cooling flow corresponding to the simulated vehicle-mounted charger under a plurality of output powers in a first power range and the minimum cooling flow under a plurality of cooling liquid temperatures in a first cooling liquid temperature range; the starting value and the ending value of the first power range are respectively a first preset power and a maximum output power corresponding to the vehicle-mounted charger; the simulated vehicle-mounted charger is based on a hardware circuit corresponding to the first power device and a cooling structure corresponding to the loss of the first power device;
and establishing a corresponding relation between the output power and the minimum cooling flow and a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
Optionally, before the first minimum cooling flow is obtained according to the correspondence between the output power and the minimum cooling flow, the method further includes:
Analyzing the vehicle to obtain the maximum output power corresponding to a direct current-direct current converter in the vehicle;
selecting a corresponding second power device according to a circuit principle based on a topology design circuit principle of the direct current-direct current converter;
Testing the minimum cooling flow corresponding to the simulated DC-DC converter under a plurality of output powers in a second power range and the minimum cooling flow under a plurality of cooling liquid temperatures in a second cooling liquid temperature range; the starting value and the ending value of the second power range are respectively a first preset power and a maximum output power corresponding to the direct current-direct current converter; the simulated direct current-direct current converter is performed based on a hardware circuit corresponding to the second power device and a cooling structure corresponding to the loss of the second power device;
and establishing a corresponding relation between the output power and the minimum cooling flow and a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
Optionally, establishing a correspondence between the output power and the minimum cooling flow specifically includes:
testing the minimum cooling flow of a vehicle-mounted charger sample at a plurality of output powers in the first power range, wherein the vehicle-mounted charger sample is designed based on the simulated vehicle-mounted charger;
The method comprises the steps that a first difference value between a minimum cooling flow corresponding to a vehicle-mounted charger sample and a simulated minimum cooling flow corresponding to the vehicle-mounted charger is in a threshold range, and a corresponding relation between output power corresponding to the vehicle-mounted charger and the minimum cooling flow is established;
if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated vehicle-mounted charger until a first difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the vehicle-mounted charger sample is in the threshold range;
and/or the number of the groups of groups,
Testing a minimum cooling flow of a DC-DC converter sample at a plurality of output powers within the second power range, the DC-DC converter sample being based on a simulated DC-DC converter design;
The method comprises the steps that a first difference value between a minimum cooling flow corresponding to a DC-DC converter sample and a simulated minimum cooling flow corresponding to the DC-DC converter is in a threshold range, and a corresponding relation between output power corresponding to the DC-DC converter and the minimum cooling flow is established;
And if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated DC-DC converter until a first difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the DC-DC converter is in the threshold range.
Optionally, establishing a correspondence between the temperature of the cooling liquid and the minimum cooling flow specifically includes:
Testing minimum cooling flow of a vehicle-mounted charger sample at a plurality of cooling liquid temperatures in the first cooling liquid temperature range, wherein the DC-DC converter sample is designed based on a simulated DC-DC converter;
The second difference value between the minimum cooling flow corresponding to the vehicle-mounted charger sample and the minimum cooling flow corresponding to the simulated vehicle-mounted charger is in a threshold range, and a corresponding relation between the cooling liquid temperature corresponding to the vehicle-mounted charger and the minimum cooling flow is established;
if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated vehicle-mounted charger until a second difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the vehicle-mounted charger is in the threshold range;
and/or the number of the groups of groups,
Testing a minimum cooling flow rate of a dc-dc converter sample at a plurality of coolant temperatures within the second coolant temperature range, the dc-dc converter sample being designed based on the simulated dc-dc converter;
The second difference value between the minimum cooling flow corresponding to the DC-DC converter sample and the minimum cooling flow corresponding to the DC-DC converter after simulation is in a threshold range, and a corresponding relation between the cooling liquid temperature corresponding to the DC-DC converter and the minimum cooling flow is established;
And if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated DC-DC converter until a second difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the DC-DC converter is in the threshold range.
Optionally, the first power range is 2200W to 6600W, and the second power range is 500W to 2500W;
the temperature range of the first cooling liquid is 14-65 ℃, and the temperature range of the second cooling liquid is 19-65 ℃.
In a second aspect, the present application provides a controller comprising: a memory and a processor;
the memory is used for storing instructions; the processor is configured to invoke instructions in the memory to perform the method of the first aspect and any of the possible designs of the first aspect.
In a third aspect, the present application provides a vehicle, including the controller, and an integrated system of a vehicle-mounted charger and a dc-dc converter.
In a fourth aspect, the present application provides a computer readable storage medium having stored therein computer instructions which, when executed by at least one processor of a controller, perform the method of the first aspect and any of the possible designs of the first aspect.
In a fifth aspect, the present application provides a computer program product comprising computer instructions which, when executed by at least one processor of a controller, perform the method of the first aspect and any of the possible designs of the first aspect.
According to the cooling flow control method, the controller and the vehicle, when the vehicle is in the preset mode, if the temperature of a target product is higher than a first preset temperature, whether the output power of the target product is higher than the first preset power is judged, if yes, the first minimum cooling flow is obtained according to the corresponding relation between the output power and the minimum cooling flow, if not, whether the temperature of cooling liquid is higher than a second preset temperature is judged, when the temperature of the cooling liquid is higher than the second preset temperature, the second minimum cooling flow is obtained according to the corresponding relation between the temperature of the cooling liquid and the minimum cooling flow, and when the temperature of the cooling liquid is lower than or equal to the second preset temperature, the cooling flow is determined to be zero. According to the scheme, the cooling flow is controlled based on the corresponding relation between the output power and the minimum cooling flow and the corresponding relation between the cooling liquid temperature and the minimum cooling flow, so that the management control of the cooling flow under the dimensions of different working conditions, different environment temperatures, different working modes, different power loads and the like is realized, and the energy consumption of the product in use is reduced.
Drawings
In order to more clearly illustrate the application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a cooling flow control method according to an embodiment of the present application;
FIG. 2 is a flow chart of a cooling flow control method according to another embodiment of the present application;
FIG. 3 is a flow chart of a cooling flow control method according to another embodiment of the present application;
FIG. 4 is a flow chart of a cooling flow control method according to still another embodiment of the present application;
Fig. 5 is a schematic hardware structure of a controller according to an embodiment of the application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As described in the background art, for the integrated system of the vehicle-mounted charger and the dc-dc converter, after the cooling flow of the vehicle-mounted charger and the dc-dc converter is collected and analyzed, it is found that a cooling flow redundancy request exists in the practical product application, which causes waste of energy flow.
In view of the above problems, the present application provides a cooling flow control method, when the temperature of a target product is greater than a first preset temperature and the output power of the target product is greater than the first preset power, a first minimum cooling flow is obtained according to a corresponding relation between the output power and the minimum cooling flow, and when the output power of the target product is less than or equal to the first preset power and the temperature of a cooling liquid is greater than a second preset temperature, a second minimum cooling flow is obtained according to a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow, thereby realizing management control of cooling flow under different working conditions, different environment temperatures, different working modes, different power loads and other dimensions, and reducing the energy consumption of product use.
The technical scheme of the application is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 1 shows a flowchart of a cooling flow control method according to an embodiment of the present application. As shown in fig. 1, with the controller as the execution body, the method of the present embodiment may include the following steps:
And S101, when the vehicle is in a preset mode, if the temperature of the target product is greater than a first preset temperature, judging whether the output power of the target product is greater than the first preset power.
In the embodiment of the application, when the vehicle is in the preset mode, whether the temperature of the target product is higher than a first preset temperature is judged, and if the temperature of the target product is higher than the first preset temperature, whether the output power of the target product is higher than the first preset power is judged.
In practical application, the integrated direct current-direct current converter of the vehicle-mounted charger is divided into three working modes, namely a charging mode, a single direct current-direct current converter module and a discharging mode, wherein the charging mode is used for a charging scene after a vehicle is parked, the discharging mode is used for a discharging scene after the vehicle is parked, the working conditions of the charging mode and the discharging mode are similar, the same cooling flow control mode can be adopted, and the single direct current-direct current converter module is used for the driving working condition of the vehicle.
In some embodiments, the preset pattern may include at least one of: a charging mode, a single dc-dc converter mode, and a discharging mode. The charging mode indicates that the vehicle-mounted charger is in a charging state, the single direct current-direct current converter mode indicates that the direct current-direct current converter is in a working state, and the discharging mode indicates that the vehicle-mounted charger is in a discharging state. When the vehicle is in a charging mode or a discharging mode, the target product is a vehicle-mounted charger; when the vehicle is in the single DC-DC converter mode, the target product is a DC-DC converter.
When the target product is a vehicle-mounted charger, the temperature of the target product can be the temperature of a power device in the vehicle-mounted charger; when the target product is a dc-dc converter, the temperature of the target product may be the temperature of the power device in the dc-dc converter. Each power device may have a corresponding output power and a corresponding first preset power.
In a specific embodiment, the first preset temperature may be determined according to an ambient temperature, for example, the first preset temperature is slightly greater than the current ambient temperature, for example, 40 ℃, and specifically is determined according to device performance. The first preset power may be determined according to a minimum output power of the target product, e.g. equal to the minimum output power.
Step S102 is executed when the output power of the target product is greater than the first preset power, and step S103 is executed when the output power of the target product is less than or equal to the first preset power.
S102, acquiring a first minimum cooling flow according to the corresponding relation between the output power and the minimum cooling flow.
In this embodiment, a correspondence between the output power and the minimum cooling flow is pre-established, and when the output power of the target product is greater than the first preset power, the first minimum cooling flow corresponding to the output power of the target product may be obtained according to the correspondence between the output power and the minimum cooling flow, where the first minimum cooling flow may be used as the cooling flow of the cooling liquid of the target product.
S103, judging whether the temperature of the cooling liquid is higher than a second preset temperature.
In this embodiment, when the output power of the target product is less than or equal to the first preset power, it is determined whether the temperature of the cooling liquid is greater than the second preset temperature. When the temperature of the cooling liquid is higher, the flow rate of the cooling liquid is increased so as to improve the heat dissipation effect, and when the temperature of the cooling liquid is lower, the flow rate can not be requested. Therefore, when the temperature of the cooling liquid is greater than the second preset temperature, step S104 is performed, and when the temperature of the cooling liquid is less than or equal to the second preset temperature, step S105 is performed.
S104, obtaining a second minimum cooling flow according to the corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
In this embodiment, a correspondence between the cooling temperature and the minimum cooling flow is pre-established, and when the temperature of the cooling liquid is greater than a second preset temperature, a second minimum cooling flow matched with the current temperature of the cooling liquid is obtained according to the correspondence between the cooling liquid temperature and the minimum cooling flow.
S105, determining that the cooling flow is zero.
According to the cooling flow control method provided by the application, the cooling flow is controlled based on the corresponding relation between the output power and the minimum cooling flow and the corresponding relation between the temperature of the cooling liquid and the minimum cooling flow, so that the management control of the cooling flow under the dimensions of different working conditions, different environment temperatures, different working modes, different power loads and the like is realized, and the energy consumption of the product is reduced.
Fig. 2 shows a flow chart of a cooling flow control method according to an embodiment of the present application. As shown in fig. 2, with the controller as the execution body, the method of the present embodiment may include the following steps:
S201, when the vehicle is in a preset mode, judging whether the temperature of the target product is higher than a first preset temperature.
If yes, go to step S202, if no, go to step S207.
S202, judging whether the output power of the target product is larger than a first preset power.
If yes, go to step S203, if no, go to step S204.
S203, acquiring a first minimum cooling flow according to the corresponding relation between the output power and the minimum cooling flow.
S204, judging whether the temperature of the cooling liquid is higher than a second preset temperature.
If yes, go to step S205, if no, go to step S206.
S205, obtaining a second minimum cooling flow according to the corresponding relation between the cooling liquid temperature and the minimum cooling liquid flow.
S206, determining that the cooling flow is zero.
S207, judging whether the temperature change rate of the target product is larger than a preset change rate.
In this embodiment, the consideration of increasing the rate of temperature change prevents hardware damage caused by the absence of coolant in the coolant channel.
If yes, step S208 is executed, and step S209 is executed.
S208, performing abnormality alarm.
S209, determining that the cooling flow is zero.
The cooling flow control method provided by the application further prevents hardware damage caused by no cooling liquid in the cooling liquid water channel by judging whether the temperature change rate of the target product is greater than the preset change rate on the basis of controlling the cooling flow based on the corresponding relation between the output power and the minimum cooling flow and the corresponding relation between the cooling liquid temperature and the minimum cooling flow.
FIG. 3 is a flow chart illustrating a cooling flow control method according to an embodiment of the present application. As shown in fig. 3, with the controller as the execution body, the method of the present embodiment may include the following steps:
s301, analyzing the vehicle and determining the maximum output power corresponding to the vehicle-mounted charger in the vehicle.
For example, according to the requirement of low-voltage power consumption and charging time of the vehicle-mounted charger, calculating the output power of the vehicle-mounted charger as the corresponding maximum output power of the vehicle-mounted charger. The charging time is understood to be the time required for the vehicle-mounted charger to fully charge the battery.
S302, selecting a corresponding first power device based on a topology design circuit principle of the vehicle-mounted charger according to the circuit principle.
For example, the principle is briefly designed according to the function of the vehicle-mounted charger, namely, the circuit principle is designed according to the topology of the vehicle-mounted charger so as to realize the characteristics of the vehicle-mounted charger, and then the electronic device is selected according to the circuit principle, namely, a corresponding second power device such as a MOS (metal oxide semiconductor) tube, an IGBT (insulated gate bipolar transistor) (Insulate-Gate Bipolar Transistor), a capacitor and the like is selected. After selecting the corresponding first power device according to the circuit principle, a hardware circuit of the vehicle-mounted charger can be designed according to the first power device and the circuit principle.
And then, designing a corresponding cooling structure based on the hardware circuit of the vehicle-mounted charger and the loss of the first power device, and simulating the vehicle-mounted charger according to the hardware circuit and the cooling structure corresponding to the vehicle-mounted charger.
Because the power device may generate certain loss in the on and off states, the loss is converted into heat, and the heat may affect the performance of the vehicle-mounted charger, the power device needs to be cooled and radiated, and for example, a corresponding cooling structure is designed based on the corresponding hardware circuit of the vehicle-mounted charger and the loss of the power device so as to take away the heat, such as a cooling flow direction, a cooling water channel and the like. And then, the vehicle-mounted charger can be subjected to simulation design based on a hardware circuit and a cooling structure corresponding to the vehicle-mounted charger.
S303, testing the minimum cooling flow corresponding to the simulated vehicle-mounted charger under the multiple output powers in the first power range and the minimum cooling flow under the multiple cooling liquid temperatures in the first cooling liquid temperature range.
The starting value and the ending value of the first power range are respectively a first preset power and a maximum output power corresponding to the vehicle-mounted charger.
In some embodiments, whether the cooling structure in the simulated vehicle-mounted charger can form steady flow, vortex flow and the like or not is tested, whether heat generated by the power device can be successfully taken away or not is tested, and if yes, the corresponding minimum cooling flow of the simulated vehicle-mounted charger under a plurality of output powers in a first power range and the minimum cooling flow of the simulated vehicle-mounted charger under a plurality of cooling liquid temperatures in the first cooling liquid temperature range are tested. The minimum cooling flow is understood to be the minimum flow at which the cooling liquid can remove heat. In practical applications, the first power range may be 2200W to 6600W, and the first cooling liquid temperature range may be 15 ℃ to 65 ℃.
S304, establishing a corresponding relation between the output power corresponding to the vehicle-mounted charger and the minimum cooling flow and a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
In this embodiment, after testing the minimum cooling flow corresponding to the simulated vehicle-mounted charger under the plurality of output powers, a correspondence relationship between the output power corresponding to the vehicle-mounted charger and the minimum cooling flow may be established. For example, when the output power is any power of 0 to 2200W, the corresponding minimum cooling flow rate may be any flow rate of 0 to 4L/min; when the output power is any power of 220W-3300W, the corresponding minimum cooling flow rate can be any flow rate of 0-5L/min; when the output power is any power of 3300W-4400W, the corresponding minimum cooling flow rate can be any flow rate of 0-6L/min; when the output power is any power of 4400W-5500W, the corresponding minimum cooling flow rate can be any flow rate of 0-6L/min; when the output power is any power of 5500W-6600W, the corresponding minimum cooling flow rate can be any flow rate of 0-6L/min.
In this embodiment, after testing the minimum cooling flow of the simulated vehicle-mounted charger at the plurality of cooling liquid temperatures, a correspondence relationship between the cooling liquid temperature and the minimum cooling flow corresponding to the vehicle-mounted charger may be established. For example, when the temperature of the cooling liquid is 14 ℃, the corresponding minimum cooling flow is 0L/min; when the temperature of the cooling liquid is 15 ℃, the corresponding minimum cooling flow is 1.5L/min; when the temperature of the cooling liquid is 25 ℃, the corresponding minimum cooling flow is 2L/min; when the temperature of the cooling liquid is 45 ℃, the corresponding minimum cooling flow is 3L/min; when the temperature of the cooling liquid is 65 ℃, the corresponding minimum cooling flow is 5L/min.
In some embodiments, before the correspondence between the output power corresponding to the vehicle-mounted charger and the minimum cooling flow is established, the vehicle-mounted charger sample may be designed based on the simulated vehicle-mounted charger, the minimum cooling flow of the vehicle-mounted charger sample under a plurality of output powers within a first power range may be tested, and whether a first difference between the minimum cooling flow of the vehicle-mounted charger sample under the plurality of output powers and the minimum cooling flow of the simulated vehicle-mounted charger under the plurality of output powers is within a threshold value range may be determined. And when the first difference value between the minimum cooling flow of the vehicle-mounted charger sample piece under the plurality of output powers and the minimum cooling flow of the simulated vehicle-mounted charger under the plurality of output powers is within a threshold range, establishing a corresponding relation between the output power and the minimum cooling flow corresponding to the vehicle-mounted charger. When the first difference value between the minimum cooling flow of the vehicle-mounted charger sample under the plurality of output powers and the minimum cooling flow of the simulated vehicle-mounted charger under the plurality of output powers is not in the threshold range, the minimum cooling flow corresponding to the simulated vehicle-mounted charger is adjusted until the first difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the vehicle-mounted charger sample is in the threshold range, and then the corresponding relation between the output power and the minimum cooling flow corresponding to the vehicle-mounted charger is established based on the adjusted minimum cooling flow corresponding to the simulated vehicle-mounted charger.
Before the corresponding relation between the cooling liquid temperature corresponding to the vehicle-mounted charger and the minimum cooling flow is established, a vehicle-mounted charger sample can be designed based on the simulated vehicle-mounted charger, the minimum cooling flow of the vehicle-mounted charger sample at a plurality of cooling liquid temperatures in a first cooling liquid temperature range is tested, and whether a second difference value between the minimum cooling flow of the vehicle-mounted charger sample at the plurality of cooling liquid temperatures and the minimum cooling flow of the simulated vehicle-mounted charger at the plurality of cooling liquid temperatures is in a threshold value range is judged. And when a second difference value between the minimum cooling flow of the vehicle-mounted charger sample piece at the plurality of cooling liquid temperatures and the minimum cooling flow of the simulated vehicle-mounted charger at the plurality of cooling liquid temperatures is within a threshold range, establishing a corresponding relation between the cooling liquid temperature and the minimum cooling flow corresponding to the vehicle-mounted charger. And when the second difference value between the minimum cooling flow rates of the vehicle-mounted charger sample pieces at the plurality of cooling liquid temperatures is not in the threshold range, adjusting the minimum cooling flow rate corresponding to the simulated vehicle-mounted charger until the second difference value between the adjusted minimum cooling flow rate and the minimum cooling flow rate corresponding to the vehicle-mounted charger sample pieces is in the threshold range, and then establishing a corresponding relation between the cooling liquid temperature corresponding to the vehicle-mounted charger and the minimum cooling flow rate based on the adjusted minimum cooling flow rate corresponding to the simulated vehicle-mounted charger.
And S305, judging whether the temperature of the vehicle-mounted charger is higher than a first preset temperature when the vehicle is in a charging or discharging mode.
The same cooling flow control method can be adopted for the vehicle in the charging mode and the vehicle in the discharging mode, so that the cooling flow control can be carried out in steps S305 to S313 when the vehicle is in the charging mode or the discharging mode.
If yes, go to step S306, if no, go to step S311.
S306, judging whether the output power of the vehicle-mounted charger is larger than a first preset power corresponding to the vehicle-mounted charger.
If yes, go to step S307, if no, go to step S308.
S307, obtaining a first minimum cooling flow corresponding to the vehicle-mounted charger according to the corresponding relation between the output power corresponding to the vehicle-mounted charger and the minimum cooling flow.
S308, judging whether the temperature of the cooling liquid is higher than a second preset temperature.
If yes, go to step S309, if no, go to step S310.
S309, obtaining a second minimum cooling flow corresponding to the vehicle-mounted charger according to the corresponding relation between the cooling liquid temperature corresponding to the vehicle-mounted charger and the minimum cooling liquid flow.
S310, determining that the cooling flow is zero.
S311, judging whether the temperature change rate of the vehicle-mounted charger is larger than a preset change rate.
If yes, step S312 is executed, and step S313 is executed.
S312, performing abnormality alarm.
S313, determining that the cooling flow is zero.
According to the cooling flow control method provided by the application, parameters of the vehicle-mounted charger are obtained after the whole vehicle target is decomposed in a charge-discharge mode, the product architecture and design principle are locked, three signal data including the cooling liquid inlet temperature, the requested conversion power and the internal power device surface temperature are collected through a front-stage hardware structure (a PCB (printed circuit board), a water channel structure and the like), loss analysis and the like, fine decoupling control is performed, a full-flow cooling flow energy consumption design flow is realized, redundant flow requests are reduced, energy consumption is reduced, meanwhile, the consideration of the temperature change rate is increased, and hardware damage caused by no water in a water channel is prevented.
Fig. 4 shows a flowchart of a cooling flow control method according to an embodiment of the present application. As shown in fig. 4, with the controller as the execution body, the method of the present embodiment may include the following steps:
S401, analyzing the vehicle, and determining the maximum output power corresponding to the direct current-direct current converter in the vehicle.
For example, according to the requirement of low voltage power consumption of the dc-dc converter and the charging time, the output power of the dc-dc converter is calculated as the corresponding maximum output power of the dc-dc converter. The charging time is understood here to be the time required for the dc-dc converter to fully charge the battery.
S402, based on the topology design circuit principle of the direct current-direct current converter, selecting a corresponding power device according to the circuit principle.
For example, the principle is briefly designed according to the function of the dc-dc converter, i.e. the circuit principle is designed according to the topology of the dc-dc converter, so as to realize the characteristics of the dc-dc converter, and then the electronic device is selected according to the circuit principle, i.e. the corresponding second power device, such as MOS transistor, IGBT, capacitor, etc., is selected. After selecting the corresponding second power device according to the circuit principle, the hardware circuit of the dc-dc converter may be designed according to the second power device and the circuit principle.
And then, designing a corresponding cooling structure based on the hardware circuit of the DC-DC converter and the loss of the second power device, and simulating the DC-DC converter according to the hardware circuit and the cooling structure corresponding to the DC-DC converter.
Since the power device may generate a certain loss in the on state, the off state, and the like, the loss may be converted into heat, and the heat may affect the performance of the dc-dc converter, it is necessary to cool and dissipate the heat of the power device, and for example, a corresponding cooling structure is designed based on the corresponding hardware circuit of the dc-dc converter and the loss of the power device, so as to take away the heat, such as a cooling flow direction, a cooling water channel, and the like. The DC-DC converter can then be designed in a simulation based on the hardware circuitry and cooling structure.
S403, testing the minimum cooling flow corresponding to the simulated DC-DC converter under a plurality of output powers in the second power range and the minimum cooling flow under a plurality of cooling liquid temperatures in the second cooling liquid temperature range.
The starting value and the ending value of the second power range are respectively a first preset power and a maximum output power corresponding to the direct current-direct current converter.
In some embodiments, whether the cooling structure in the simulated dc-dc converter can form steady flow, vortex flow, etc. and whether the heat generated by the power device can be successfully carried away is tested, and if so, the minimum cooling flow corresponding to the simulated dc-dc converter at a plurality of output powers in the second power range and the minimum cooling flow at a plurality of coolant temperatures in the second coolant temperature range are tested. The minimum cooling flow is understood to be the minimum flow at which the cooling liquid can remove heat. In practical applications, the second power range may be, for example, 500W to 2500W, and the first cooling liquid temperature range may be, for example, 20 ℃ to 65 ℃.
S404, establishing a corresponding relation between the output power corresponding to the DC-DC converter and the minimum cooling flow and a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
In this embodiment, after testing the minimum cooling flow corresponding to the simulated dc-dc converter at the plurality of output powers, a correspondence relationship between the output power corresponding to the dc-dc converter and the minimum cooling flow may be established. For example, when the output power is any power of 500W to 1000W, the corresponding minimum cooling flow rate may be any flow rate of 1L/min to 2L/min; when the output power is any power of 1000W-1500W, the corresponding minimum cooling flow rate can be any flow rate of 1L/min-2L/min; when the output power is any power of 1500W-2000W, the corresponding minimum cooling flow rate can be any flow rate of 1L/min-2L/min; when the output power is any power of 2000W to 2500W, the corresponding minimum cooling flow rate can be any flow rate of 1L/min to 6L/min.
In this embodiment, after testing the minimum cooling flow of the simulated dc-dc converter at the plurality of cooling liquid temperatures, the correspondence between the cooling liquid temperature corresponding to the dc-dc converter and the minimum cooling flow may be established. For example, when the temperature of the cooling liquid is 19 ℃, the corresponding minimum cooling flow is 0; when the temperature of the cooling liquid is 20 ℃, the corresponding minimum cooling flow is 1L/min; when the temperature of the cooling liquid is 25 ℃, the corresponding minimum cooling flow is 2L/min; when the temperature of the cooling liquid is 45 ℃, the corresponding minimum cooling flow is 4L/min; when the temperature of the cooling liquid is 65 ℃, the corresponding minimum cooling flow is 6L/min.
In some embodiments, before establishing the correspondence between the output power corresponding to the dc-dc converter and the minimum cooling flow, the dc-dc converter sample may be designed based on the simulated dc-dc converter, the minimum cooling flow of the dc-dc converter sample at the plurality of output powers in the second power range may be tested, and whether the first difference between the minimum cooling flow of the dc-dc converter sample at the plurality of output powers and the minimum cooling flow of the simulated dc-dc converter at the plurality of output powers is within the threshold range may be determined. And when the first difference value between the minimum cooling flow of the DC-DC converter sample piece under the plurality of output powers and the minimum cooling flow of the simulated DC-DC converter under the plurality of output powers is within a threshold range, establishing a corresponding relation between the output power and the minimum cooling flow corresponding to the DC-DC converter. And when the first difference value between the minimum cooling flow of the DC-DC converter sample piece under the plurality of output powers and the minimum cooling flow of the simulated DC-DC converter under the plurality of output powers is not in the threshold value range, adjusting the minimum cooling flow corresponding to the simulated DC-DC converter until the first difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the DC-DC converter sample piece is in the threshold value range, and then establishing the corresponding relation between the output power corresponding to the DC-DC converter and the minimum cooling flow based on the adjusted minimum cooling flow corresponding to the simulated DC-DC converter.
Before the correspondence between the coolant temperatures corresponding to the dc-dc converter and the minimum cooling flow is established, the dc-dc converter sample may be designed based on the simulated dc-dc converter, the minimum cooling flow of the dc-dc converter sample at the plurality of coolant temperatures within the second coolant temperature range may be tested, and whether the second difference between the minimum cooling flow of the dc-dc converter sample at the plurality of coolant temperatures and the minimum cooling flow of the simulated dc-dc converter at the plurality of coolant temperatures is within the threshold range may be determined. And when a second difference value between the minimum cooling flow of the DC-DC converter sample piece at the plurality of cooling liquid temperatures and the minimum cooling flow of the simulated DC-DC converter at the plurality of cooling liquid temperatures is within a threshold range, establishing a corresponding relation between the cooling liquid temperature corresponding to the DC-DC converter and the minimum cooling flow. And when the second difference value between the minimum cooling flow rates of the DC-DC converter sample pieces at the plurality of cooling liquid temperatures is not in the threshold value range, adjusting the minimum cooling flow rate corresponding to the simulated DC-DC converter until the second difference value between the adjusted minimum cooling flow rate and the minimum cooling flow rate corresponding to the DC-DC converter sample pieces is in the threshold value range, and then establishing the corresponding relation between the cooling liquid temperature corresponding to the DC-DC converter and the minimum cooling flow rate based on the adjusted minimum cooling flow rate corresponding to the simulated DC-DC converter.
S405, when the vehicle is in the single DC-DC converter mode, judging whether the temperature of the DC-DC converter is greater than a first preset temperature.
If yes, go to step S406, if no, go to step S411.
S406, judging whether the output power of the DC-DC converter is larger than a first preset power corresponding to the DC-DC converter.
If yes, go to step S407, if no, go to step S408.
S407, obtaining a first minimum cooling flow corresponding to the DC-DC converter according to the corresponding relation between the output power corresponding to the DC-DC converter and the minimum cooling flow.
S408, judging whether the temperature of the cooling liquid is higher than a second preset temperature.
If yes, go to step S409, if no, go to step S410.
S409, obtaining a second minimum cooling flow corresponding to the DC-DC converter according to the corresponding relation between the cooling liquid temperature corresponding to the DC-DC converter and the minimum cooling liquid flow.
S410, determining that the cooling flow is zero.
S411, judging whether the temperature change rate of the DC-DC converter is larger than a preset change rate.
If yes, step S412 is executed, and step S413 is executed.
S412, performing abnormality alarm.
S413, determining that the cooling flow is zero.
According to the cooling flow control method provided by the application, under a single DC-DC converter mode, parameters of the DC-DC converter are obtained after the whole vehicle target is decomposed, the product architecture and design principle are locked, three signal data including the cooling liquid inlet temperature, the requested conversion power and the internal power device surface temperature are collected through early hardware structures (PCB (printed Circuit Board), water channel structures and the like), loss analysis and the like, fine decoupling control is performed, the whole flow cooling flow energy consumption design flow is realized, redundant flow requests are reduced, the energy consumption is reduced, meanwhile, the consideration of the temperature change rate is increased, and the hardware damage caused by no water in a water channel is prevented.
The cooling flow control method provided by the embodiment of the application is described in detail above, and not only can the reasonable configuration be carried out according to the actual power output (the bench calibration test matching is carried out according to the hardware radiating power, the water channel structure and the like), but also the cooling performance of the product can be fully used, the flow request threshold of the product for the whole water pump can be effectively reduced, the low-voltage power consumption of the whole water pump can be further reduced, the energy saving can be realized, and the comprehensive competitiveness of the product can be improved. And unnecessary flow requests at low temperature can be eliminated, adverse effects of low temperature on product performance are eliminated, and meanwhile, the consideration of temperature change rate is increased, so that hardware damage caused by no water in a water channel is prevented.
The application provides a controller, and fig. 5 shows a schematic hardware structure of the controller according to an embodiment of the application. As shown in fig. 5, the controller 20, configured to implement operations corresponding to the controller in any of the above method embodiments, the controller 20 of this embodiment may include: a memory 21, a processor 22 and a communication interface 23.
A memory 21 for storing computer instructions. The Memory 21 may include a high-speed random access Memory (Random Access Memory, RAM), and may further include a Non-Volatile Memory (NVM), such as at least one magnetic disk Memory, and may also be a U-disk, a removable hard disk, a read-only Memory, a magnetic disk, or an optical disk.
A processor 22 for executing computer instructions stored in memory to implement the methods of the embodiments described above. Reference may be made in particular to the relevant description of the embodiments of the method described above. The Processor 22 may be a central processing unit (Central Processing Unit, CPU), or may be other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.
Alternatively, the memory 21 may be separate or integrated with the processor 22.
The communication interface 23 may be connected to the processor 22. The processor 22 may control the communication interface 23 to perform the functions of receiving and transmitting signals.
The controller provided in this embodiment may be used to execute the above method, and its implementation manner and technical effects are similar, and this embodiment will not be described herein again.
The application also provides a vehicle, which comprises the controller and an integrated system of the vehicle-mounted charger and the direct current-direct current converter.
The present application also provides a computer readable storage medium having stored therein computer instructions which, when executed by a processor, are adapted to carry out the methods provided by the various embodiments described above.
The present application also provides a computer program product comprising computer instructions stored in a computer readable storage medium. The computer instructions may be read from a computer-readable storage medium by at least one processor of the device, and executed by the at least one processor, cause the device to implement the methods provided by the various embodiments described above.
The embodiment of the application also provides a chip, which comprises a memory and a processor, wherein the memory is used for storing computer instructions, and the processor is used for calling and running the computer instructions from the memory, so that a device provided with the chip executes the method in various possible implementation manners.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same. Although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with equivalents. Such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. A method of cooling flow control, the method being adapted for use with a vehicle including an on-board charger and dc-dc converter integrated system, the method comprising:
When the vehicle is in a preset mode, if the temperature of the target product is greater than a first preset temperature, judging whether the output power of the target product is greater than the first preset power;
if yes, acquiring a first minimum cooling flow according to the corresponding relation between the output power and the minimum cooling flow;
If not, judging whether the temperature of the cooling liquid is greater than a second preset temperature, acquiring a second minimum cooling flow according to the corresponding relation between the temperature of the cooling liquid and the minimum cooling flow when the temperature of the cooling liquid is greater than the second preset temperature, and determining that the cooling flow is zero when the temperature of the cooling liquid is less than or equal to the second preset temperature.
2. The method according to claim 1, wherein the method further comprises:
If the temperature of the target product is less than or equal to a first preset temperature, judging whether the temperature change rate of the target product is greater than a preset change rate;
if yes, carrying out abnormal alarm, otherwise, determining that the cooling flow is zero.
3. The method according to claim 1 or 2, wherein the preset pattern comprises at least one of: a charging mode, a single dc-dc converter mode, and a discharging mode;
the charging mode indicates that the vehicle-mounted charger is in a charging state, the single direct current-direct current converter mode indicates that the direct current-direct current converter is in a working state, and the discharging mode indicates that the vehicle-mounted charger is in a discharging state;
When the vehicle is in the charging mode or the discharging mode, the target product is the vehicle-mounted charger; when the vehicle is in the single DC-DC converter mode, the target product is the DC-DC converter.
4. A method according to claim 3, characterized in that before the first minimum cooling flow is obtained from the correspondence between the output power and the minimum cooling flow, the method further comprises:
Analyzing the vehicle and determining the maximum output power corresponding to a vehicle-mounted charger in the vehicle;
Based on the topology design circuit principle of the vehicle-mounted charger, selecting a corresponding first power device according to the circuit principle;
Testing the minimum cooling flow corresponding to the simulated vehicle-mounted charger under a plurality of output powers in a first power range and the minimum cooling flow under a plurality of cooling liquid temperatures in a first cooling liquid temperature range; the starting value and the ending value of the first power range are respectively a first preset power and a maximum output power corresponding to the vehicle-mounted charger; the simulated vehicle-mounted charger is based on a hardware circuit corresponding to the first power device and a cooling structure corresponding to the loss of the first power device;
and establishing a corresponding relation between the output power and the minimum cooling flow and a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
5. The method of claim 4, wherein prior to obtaining the first minimum cooling flow rate based on the correspondence between the output power and the minimum cooling flow rate, the method further comprises:
Analyzing the vehicle to obtain the maximum output power corresponding to a direct current-direct current converter in the vehicle;
selecting a corresponding second power device according to a circuit principle based on a topology design circuit principle of the direct current-direct current converter;
Testing the minimum cooling flow corresponding to the simulated DC-DC converter under a plurality of output powers in a second power range and the minimum cooling flow under a plurality of cooling liquid temperatures in a second cooling liquid temperature range; the starting value and the ending value of the second power range are respectively a first preset power and a maximum output power corresponding to the direct current-direct current converter; the simulated direct current-direct current converter is performed based on a hardware circuit corresponding to the second power device and a cooling structure corresponding to the loss of the second power device;
and establishing a corresponding relation between the output power and the minimum cooling flow and a corresponding relation between the temperature of the cooling liquid and the minimum cooling flow.
6. The method according to claim 5, wherein establishing the correspondence between the output power and the minimum cooling flow rate comprises:
testing the minimum cooling flow of a vehicle-mounted charger sample at a plurality of output powers in the first power range, wherein the vehicle-mounted charger sample is designed based on the simulated vehicle-mounted charger;
The method comprises the steps that a first difference value between a minimum cooling flow corresponding to a vehicle-mounted charger sample and a simulated minimum cooling flow corresponding to the vehicle-mounted charger is in a threshold range, and a corresponding relation between output power corresponding to the vehicle-mounted charger and the minimum cooling flow is established;
if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated vehicle-mounted charger until a first difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the vehicle-mounted charger sample is in the threshold range;
and/or the number of the groups of groups,
Testing a minimum cooling flow of a DC-DC converter sample at a plurality of output powers within the second power range, the DC-DC converter sample being based on a simulated DC-DC converter design;
The method comprises the steps that a first difference value between a minimum cooling flow corresponding to a DC-DC converter sample and a simulated minimum cooling flow corresponding to the DC-DC converter is in a threshold range, and a corresponding relation between output power corresponding to the DC-DC converter and the minimum cooling flow is established;
And if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated DC-DC converter until a first difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the DC-DC converter is in the threshold range.
7. The method according to claim 5, wherein establishing the correspondence between the coolant temperature and the minimum cooling flow rate comprises:
Testing minimum cooling flow of a vehicle-mounted charger sample at a plurality of cooling liquid temperatures in the first cooling liquid temperature range, wherein the DC-DC converter sample is designed based on a simulated DC-DC converter;
The second difference value between the minimum cooling flow corresponding to the vehicle-mounted charger sample and the minimum cooling flow corresponding to the simulated vehicle-mounted charger is in a threshold range, and a corresponding relation between the cooling liquid temperature corresponding to the vehicle-mounted charger and the minimum cooling flow is established;
if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated vehicle-mounted charger until a second difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the vehicle-mounted charger is in the threshold range;
and/or the number of the groups of groups,
Testing a minimum cooling flow rate of a dc-dc converter sample at a plurality of coolant temperatures within the second coolant temperature range, the dc-dc converter sample being designed based on the simulated dc-dc converter;
The second difference value between the minimum cooling flow corresponding to the DC-DC converter sample and the minimum cooling flow corresponding to the DC-DC converter after simulation is in a threshold range, and a corresponding relation between the cooling liquid temperature corresponding to the DC-DC converter and the minimum cooling flow is established;
And if the minimum cooling flow is not in the threshold range, adjusting the minimum cooling flow corresponding to the simulated DC-DC converter until a second difference value between the adjusted minimum cooling flow and the minimum cooling flow corresponding to the DC-DC converter is in the threshold range.
8. The method of claim 5, wherein the first power range is 2200W to 6600W and the second power range is 500W to 2500W;
the temperature range of the first cooling liquid is 14-65 ℃, and the temperature range of the second cooling liquid is 19-65 ℃.
9. A controller, comprising: a processor, and a memory communicatively coupled to the processor;
the memory stores computer-executable instructions;
The processor executes computer-executable instructions stored in the memory to implement the cooling flow control method as claimed in any one of claims 1 to 8.
10. A vehicle comprising the controller of claim 9, and an on-board charger and dc-dc converter integrated system.
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