Heat dissipation structure and heat dissipation method of automobile high-pressure water heating PTC heating controller

Abstract

The invention discloses a heat dissipation structure of an automobile high-pressure water heating PTC heating controller, and relates to the technical field of automobile heat dissipation, the heat dissipation structure comprises a controller main body, and a plurality of temperature monitoring points are arranged on the outer side of a shell on one side of the controller main body; the heat conduction part is adhered to the outer side of the shell on one side of the controller main body and is used for being communicated with an external liquid cooling mechanism; the fixed heat dissipation piece is mounted on the outer side of the shell on one side of the controller main body and the outer side of the heat conduction piece; the movable heat dissipation piece is arranged on the outer side of the fixed heat dissipation piece; and the water cooling box is an external liquid cooling mechanism. The invention further discloses a heat dissipation method of the automobile high-pressure water heating PTC heating controller, the heat dissipation method comprises five steps, through cooperative work of multiple heat dissipation modes, the temperature of the high-pressure water heating PTC heating controller can be rapidly and effectively reduced, the heat dissipation efficiency of the high-pressure water heating PTC heating controller is improved, and it is ensured that the high-pressure water heating PTC heating controller can stably operate under various working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of automobile heat dissipation, in particular to a heat dissipation structure and a heat dissipation method of an automobile high-pressure water-heating PTC heating controller. Background Art

[0002] In the operation of new energy vehicles, the high-pressure water heating PTC heating controller plays a key role. It is used to control the PTC heater to achieve functions such as in-vehicle heating and battery preheating. However, the PTC heater generates a lot of heat when working. If the heat cannot be dissipated in time and effectively, the temperature of the high-pressure water heating PTC heating controller will be too high. This will not only affect its performance and reliability, such as reducing control accuracy and shortening service life, but may also cause safety hazards, such as overheating and fire.

[0003] The invention with publication number CN113968120A discloses a high-pressure water heating PTC control system and method with multi-speed adjustment control, including a PTC heater and a PTC controller, wherein the PTC controller is used to control the operation of the PTC heater to achieve control of the PTC water outlet temperature; the PTC heater is configured with multi-speed power adjustment, and the PTC controller controls the PTC output corresponding gear according to the gear signal sent by the upper computer to control the temperature of the PTC output port.

[0004] As shown in the above invention, the existing high-pressure water heating PTC control system generally controls the PTC through multiple power gears to make it work in the most appropriate gear, while meeting the heating battery demand and reducing power consumption, thereby reducing the impact of battery heating on the driving range. However, the air cooling method has poor heat dissipation effect when the vehicle is at low speed or stationary, because there is a lack of natural air cooling assistance during driving; although the liquid cooling method has a relatively high heat dissipation efficiency, the system structure is complex, the cost is high, and the risk of coolant leakage is difficult to completely avoid. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a heat dissipation structure and a heat dissipation method for a high-pressure water-heating PTC heating controller for an automobile, thereby solving the existing problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The heat dissipation structure of the automobile high-pressure water heating PTC heating controller includes:

[0007] A controller body, wherein a phase change material is filled between a heating element inside the controller body and a shell, and a shell on one side of the controller body is made of a heat-conducting material, and a plurality of temperature monitoring points are arranged on the outer side of the shell on one side of the controller body;

[0008] A heat-conducting member, which is attached to the outer side of the housing of the controller body and is used to connect to an external liquid cooling mechanism;

[0009] A fixed heat sink, which is installed on the outer side of a housing on one side of the controller body and on the outer side of the heat conductor, and is used to dissipate heat transferred through the heat conductor;

[0010] A movable heat sink, which is arranged outside the fixed heat sink and is adjusted by an adjustment mechanism installed on the fixed heat sink to increase the heat dissipation area of ​​the heat sink;

[0011] The water cooling box is an external liquid cooling mechanism, which is connected to the heat conducting member through a circulation pipe and is used for liquid cooling of the controller body. A circulation pump and a sensor module are provided on the circulation pipe, and the sensor module includes a temperature sensor and a flow sensor.

[0012] Preferably, a first fan is installed at one end of the outer side of the outer shell of one side of the controller body, and the heat conductor includes a heat conducting plate attached to the middle part of the outer side of the outer shell of one side of the controller body, and a winding heat conducting pipe is embedded in the heat conducting plate, and the heat conducting pipe is connected to the circulation pipe on the water cooling box.

[0013] Preferably, the fixed heat sink includes fixed plates fixed on both sides of one side of the controller body, a slot is provided on the side of the fixed plate away from the controller body, the fixed plates are arranged on both sides of the heat conducting plate, an extension plate is fixed on the middle part of the outer side of the fixed plate away from the controller body, a telescopic cylinder is fixed on one side of the extension plate, a plurality of fixed heat sinks distributed at equal intervals are arranged between the two fixed plates, and the fixed heat sinks are fixed on the heat conducting plate.

[0014] Preferably, the movable heat sink includes a movable cover arranged on the outside of the fixed heat sink, two ends of the movable cover are respectively inserted into slots on two fixed plates, the movable cover and the fixed plates cooperate to form an air duct, a second fan is fixed to the inner wall of one end of the movable plate, the second fan is staggered with the first fan, convex plates are fixed to the outside of both sides of the movable plate, the convex plates are fixed to the output rod of the telescopic cylinder, a plurality of movable heat sinks distributed at equal intervals are fixed to the inner wall of the movable plate, the movable heat sinks are staggered and fitted with the fixed heat sinks.

[0015] The present invention also discloses a heat dissipation method of a high-pressure water-heating PTC heating controller for an automobile, comprising the following steps:

[0016] Step 1: Obtain vehicle operating condition information through the CAN bus, and perform heat dissipation control based on the operating condition. When the vehicle is running at a low speed or stationary and the temperature of the PTC heating controller is higher than the set threshold, start the first fan and the second fan in the heat dissipation duct, and adjust the fan speed according to the temperature deviation through the controller;

[0017] Step 2: When the battery cooling system has excess cooling capacity, part of the coolant in the water cooling box is introduced into the PTC heating controller cooling system through the heat exchanger, and the flow control valve and temperature sensor are used to achieve energy collaborative heat dissipation to ensure that the normal operation of the battery is not affected;

[0018] Step 3: After the high-pressure water heating PTC heating controller is started, the circulating pump draws the coolant from the storage tank, absorbs heat through the microchannel heat dissipation channel and returns to the storage tank. The flow sensor and temperature sensor are used to realize the coolant circulation and heat dissipation. When the flow is low, the circulating pump speed is adjusted, and when the temperature is high, the auxiliary heat dissipation device is started;

[0019] Step 4: Set a temperature monitoring point on the housing of the heating controller. When the air-cooling start temperature is reached, the first fan and the second fan start working, and the fan speed is intelligently adjusted according to the preset temperature-speed curve and combined with the vehicle operating conditions;

[0020] Step 5: Use an intelligent control system to collect data such as the heating controller temperature, coolant temperature and flow, and fan speed in real time, coordinate the coolant circulation system and the air cooling system, and design an intelligent control valve to adjust the coolant introduction amount according to the PTC heating controller temperature and the battery cooling system load.

[0021] Preferably, the first fan and the second fan are both brushless DC fans with a maximum air volume of 500m 3 / h, static pressure is 50Pa, the heat exchanger is a high-efficiency plate heat exchanger, and the heat transfer coefficient reaches 5000W / (m 2 K), the heat exchange area is 0.5m 2 The circulating pump is a high-performance centrifugal pump with a flow rate of 30L / min and a head of 10m.

[0022] Preferably, the intelligent control system adopts the NVIDIA Jetson Xavier NX embedded computing platform.

[0023] Preferably, the intelligent control valve is an electric regulating valve, and the opening is controlled by a 4-20mA current signal.

[0024] Beneficial Effects

[0025] The present invention provides a heat dissipation structure and heat dissipation method for a high-pressure water-heating PTC heating controller for automobiles. Compared with the prior art, it has the following beneficial effects:

[0026] 1. The heat dissipation structure and heat dissipation method of the automobile high-pressure water heating PTC heating controller can quickly and effectively reduce the temperature of the high-pressure water heating PTC heating controller through the coordinated work of multiple heat dissipation methods, improve its heat dissipation efficiency, ensure stable operation under various working conditions, intelligently control the working intensity of each heat dissipation component, adjust the fan speed and circulation pump flow according to actual heat dissipation needs, avoid unnecessary energy consumption, and reduce vehicle energy consumption.

[0027] 2. The heat dissipation structure and heat dissipation method of the automotive high-pressure water heating PTC heating controller monitors key parameters in real time, promptly discovers and solves heat dissipation problems, reduces the risk of failure due to overheating, and improves the reliability and service life of the high-pressure water heating PTC heating controller. Under the premise of ensuring efficient heat dissipation, it reasonably selects heat dissipation components and control algorithms, avoids the use of overly complex and expensive heat dissipation systems, and reduces system costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the fixed heat sink of the present invention;

[0030] Figure 3 The schematic diagram of the structure of the movable heat sink of the present invention is

[0031] Figure 4 The schematic diagram of the water cooling box structure connection of the present invention is

[0032] Figure 5 It is a schematic diagram of the method flow of the present invention.

[0033] In the figure: controller body 1, first fan 11, heat conduction member 2, heat conduction plate 21, heat conduction pipe 22, fixed heat sink 3, fixed plate 31, slot 32, extension plate 33, telescopic cylinder 34, fixed heat sink 35, movable heat sink 4, movable cover 41, second fan 42, convex plate 43, movable heat sink 44, water cooling box 5, circulation pipe 51, circulation pump 52, sensor module 53. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See Figure 1-5 , the present invention provides the following two technical solutions:

[0036] The first embodiment: The heat dissipation structure of the automobile high-pressure water-heating PTC heating controller includes a controller body 1, a heat-conducting member 2, a fixed heat dissipating member 3, a movable heat dissipating member 4 and a water cooling box 5.

[0037] Specifically, a phase change material is filled between the heating element inside the controller body 1 and the outer shell, and one side of the outer shell of the controller body 1 is made of a heat-conducting material, a first fan 11 is installed at one end of the outer side of the outer shell of the controller body 1, and a plurality of temperature monitoring points are arranged on the outer side of the outer shell of the controller body 1, and the plurality of temperature monitoring points are respectively located on the outer sides of the plurality of heating elements inside the controller body 1;

[0038] Specifically, the heat conducting member 2 is attached to the outer side of the housing of the controller body 1 and is used to connect to the external liquid cooling mechanism. The heat conducting member 2 includes a heat conducting plate 21 attached to the middle of the outer side of the housing of the controller body 1. A meandering heat conducting pipe 22 is embedded in the heat conducting plate 21. The heat conducting pipe 22 is connected to the circulation pipe 51 on the water cooling box 5.

[0039] More specifically, the fixed heat sink 3 is installed on the outer side of the outer shell of one side of the controller body 1 and the outer side of the heat conductor 2, and is used to dissipate the heat transferred through the heat conductor 2. The fixed heat sink 3 includes a fixed plate 31 fixed on both sides of one side of the controller body 1, and a slot 32 is provided on the side of the fixed plate 31 away from the controller body 1. The fixed plate 31 is arranged on both sides of the heat conductor 21, and an extension plate 33 is fixed to the middle part of the outer side of the fixed plate 31 away from the controller body 1, and a telescopic cylinder 34 is fixed to one side of the extension plate 33. A plurality of equally spaced fixed heat sinks 35 are arranged between the two fixed plates 31, and the fixed heat sink 35 is fixed on the heat conductor 21. The heat conductor 21 transfers heat to the fixed heat sink 35, and a plurality of equally spaced through holes are provided on the fixed heat sink 35 to increase its contact area with the air.

[0040] More specifically, the movable heat sink 4 is arranged on the outside of the fixed heat sink 3, and the movable heat sink 4 is adjusted by an adjustment mechanism installed on the fixed heat sink 3 to increase the heat dissipation area of ​​the heat sink. The movable heat sink 4 includes a movable cover 41 arranged on the outside of the fixed heat sink 3, and both ends of the movable cover 41 are respectively inserted into the slots 32 on the two fixed plates 31, and the movable cover 41 and the fixed plates 31 cooperate to form an air duct, and a second fan 42 is fixed on the inner wall of one end of the movable plate 41, and the second fan 42 is staggered with the first fan 11. Convex plates 43 are fixed to the outside of both sides of the movable plate 41, and the convex plates 43 are fixed to the output rod of the telescopic cylinder 34. A plurality of movable heat sinks 44 distributed at equal intervals are fixed on the inner wall of the movable plate 41. The movable heat sink 44 is staggered and fitted with the fixed heat sink 35, and a plurality of through holes distributed at equal intervals are opened on the movable heat sink 44 to increase its contact area with the air.

[0041] More specifically, the water cooling box 5 is an external liquid cooling mechanism, which is connected to the heat conducting member 2 via a circulation pipe 51 and is used for liquid cooling of the controller body 1. A circulation pump 52 and a sensor module 53 are provided on the circulation pipe 51. The sensor module 53 includes a temperature sensor and a flow sensor.

[0042] In this embodiment, if the temperature sensor detects that the temperature exceeds the threshold value, and the temperature still cannot drop quickly after the liquid cooling mechanism participates in the heat dissipation work, the telescopic cylinder 34 on the fixed plate 31 is started at this time, and the telescopic cylinder 34 drives the movable cover 41 to move upward, and the movable cover 41 drives the movable heat sink 44 to move upward, thereby increasing the contact area between the fixed heat sink 35 and the movable heat sink 44 and the air, and once again increasing the heat dissipation efficiency, so that the temperature of the controller body 1 drops rapidly. The second embodiment: The heat dissipation method of the automotive high-pressure water heating PTC heating controller includes the following steps:

[0043] Step 1: Obtain vehicle operating condition information through the CAN bus. The CAN bus system builds a data exchange bridge between the vehicle's sensors and control units, so that vehicle speed, battery temperature, motor temperature, and vehicle acceleration, deceleration, cruising and other operating condition information can be stably and timely transmitted to the intelligent control system, and heat dissipation control is performed based on the operating conditions. When the vehicle is traveling at a low speed or stationary and the temperature of the PTC heating controller is higher than the set threshold, the first fan and the second fan in the heat dissipation duct are started, and the fan speed is adjusted according to the temperature deviation through the controller;

[0044] Step 2: When the battery cooling system has excess cooling capacity, part of the coolant in the water cooling box is introduced into the PTC heating controller cooling system through the heat exchanger, and the flow control valve and temperature sensor are used to achieve energy collaborative heat dissipation to ensure that the normal operation of the battery is not affected;

[0045] Step 3: After the high-pressure water heating PTC heating controller is started, the circulating pump draws the coolant from the storage tank, absorbs heat through the microchannel heat dissipation channel and returns to the storage tank. The flow sensor and temperature sensor are used to realize the coolant circulation and heat dissipation. When the flow is low, the circulating pump speed is adjusted, and when the temperature is high, the auxiliary heat dissipation device is started;

[0046] Step 4: Set a temperature monitoring point on the housing of the heating controller. When the air-cooling start-up temperature is reached, the first fan and the second fan start working, and the fan speed is intelligently adjusted according to the preset temperature-speed curve and combined with the vehicle operating conditions.

[0047] Step 5: Use the intelligent control system of the NVIDIA Jetson Xavier NX embedded computing platform to collect data such as the heating controller temperature, coolant temperature and flow, and fan speed in real time, coordinate the coolant circulation system and the air cooling system, and design an intelligent control valve to adjust the amount of coolant introduced according to the PTC heating controller temperature and the battery cooling system load.

[0048] In this embodiment, the first fan and the second fan are both DC brushless fans with a maximum air volume of 500m 3 / h, static pressure is 50Pa, DC brushless fan has the advantages of high efficiency, low noise and long life, which can meet the needs of long-term stable operation of vehicles. The heat exchanger is a high-efficiency plate heat exchanger with a heat transfer coefficient of 5000W / (m 2 K), the heat exchange area is 0.5m 2 The circulation pump is a high-performance centrifugal pump with a flow rate of 30L / min and a head of 10m. The intelligent control valve is an electric regulating valve, and the opening is controlled by a 4-20mA current signal.

[0049] In this embodiment, a temperature sensor with a response time of less than 10ms and an accuracy of ±0.1°C is selected. The sensor has high sensitivity and stability and can quickly and accurately sense the temperature changes of the key heating parts of the PTC heating controller. Through a customized special mounting bracket, the temperature sensor is tightly fixed near the power module and control chip of the PTC heating controller to ensure that the sensor is in full contact with the heating element to obtain the most realistic temperature data.

[0050] In this embodiment, the controller adopts the STM32 series microcontroller, which has high performance, low power consumption and rich peripheral resources, and can meet complex control requirements. It has a built-in advanced PID control algorithm program. The PID control algorithm is a classic and widely used control algorithm. Through the calculation of the three links of proportion (P), integration (I) and differentiation (D), the adjustment amount of the auxiliary fan speed is accurately calculated according to the deviation between the temperature feedback from the temperature sensor and the preset temperature.

[0051] In this embodiment, the position PID algorithm formula is:

[0052] The calculation formula of the output control quantity u(t) is:

[0053]

[0054] Wherein, u(t) is the controller output at time t, i.e., the control signal used to adjust the auxiliary fan speed; K p is the proportional coefficient, which determines the response strength of the controller to the current temperature deviation. For example, when the proportional coefficient K pWhen K increases, the fan speed will respond more quickly to the temperature deviation; e(t) is the temperature deviation at time t, that is, the difference between the preset temperature and the actual detected temperature of the PTC heating controller; K i is the integral coefficient, which is used to eliminate the steady-state error of the system and accumulate the temperature deviation over a period of time; K d It is the differential coefficient, which predicts the temperature change trend according to the change rate of temperature deviation, adjusts the fan speed in advance, and enhances the stability of the system.

[0055] Incremental PID algorithm formula:

[0056] The incremental PID algorithm calculates the increment of the control quantity Δu(t), and the formula is:

[0057] Δu(t)=K p [e(t)-e(t-1)]+K i e(t)+K d [e(t)-2e(t-1)+e(t-2)];

[0058] Here, Δu(t) is the increment of the control quantity at time t, which is used to adjust the change in the auxiliary fan speed; e(t), e(t-1), and e(t-2) are the temperature deviations at time t, t-1, and t-2, respectively. Compared with the position PID algorithm, the incremental PID algorithm does not require integral operations, has a smaller amount of calculation, and performs better in some systems that are sensitive to changes in the control quantity. In the heat dissipation control based on the working condition, the incremental PID algorithm can more flexibly adjust the change in the auxiliary fan speed according to the change in temperature deviation to adapt to different working conditions.

[0059] When the vehicle is driving at a low speed or stationary, the temperature of the PTC heating controller is prone to rise due to the lack of natural air cooling assistance during driving. Once the temperature sensor detects that the temperature of the PTC heating controller is higher than the set threshold, the intelligent control system responds quickly and starts the auxiliary fan. The controller adjusts the fan speed in real time according to the temperature deviation. If the temperature deviation is large, that is, the actual temperature of the PTC heating controller is much higher than the preset temperature, the controller increases the role of the proportional link and quickly increases the fan speed to enhance the air cooling effect; at the same time, the integral link accumulates the temperature deviation to eliminate the steady-state error of the system and ensure that the fan speed can continue to stabilize at an appropriate level; the differential link predicts the temperature change trend in advance according to the rate of change of the temperature deviation, and fine-tunes the fan speed to make the heat dissipation control more accurate. As the temperature gradually decreases, the controller gradually reduces the fan speed to reduce energy consumption and noise, achieve different intensities of air cooling, and ensure that the PTC heating controller can remain in a suitable operating temperature range under various working conditions.

[0060] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The heat dissipation structure of the automotive high-pressure water heating PTC heating controller is characterized by: include: A controller body, wherein a phase change material is filled between a heating element inside the controller body and a shell, and a shell on one side of the controller body is made of a heat-conducting material, and a plurality of temperature monitoring points are arranged on the outer side of the shell on one side of the controller body; A heat-conducting member, which is attached to the outer side of the housing of the controller body and is used to connect to an external liquid cooling mechanism; A fixed heat sink, which is installed on the outer side of a housing on one side of the controller body and on the outer side of the heat conductor, and is used to dissipate heat transferred through the heat conductor; A movable heat sink, which is arranged outside the fixed heat sink and is adjusted by an adjustment mechanism installed on the fixed heat sink to increase the heat dissipation area of ​​the heat sink; The water cooling box is an external liquid cooling mechanism, which is connected to the heat conducting member through a circulation pipe and is used for liquid cooling of the controller body. A circulation pump and a sensor module are provided on the circulation pipe, and the sensor module includes a temperature sensor and a flow sensor.

2. The heat dissipation structure of the automotive high-pressure water heating PTC heating controller according to claim 1 is characterized by: A first fan is installed at one end of the outer side of the outer shell of one side of the controller body. The heat conductive component includes a heat conductive plate attached to the middle part of the outer side of the outer shell of one side of the controller body. A meandering heat conductive pipe is embedded in the heat conductive plate. The heat conductive pipe is connected to the circulation pipe on the water cooling box.

3. The heat dissipation structure of the automotive high-pressure water heating PTC heating controller according to claim 1 is characterized by: The fixed heat sink includes fixed plates fixed on both sides of one side of the controller body, a slot is provided on the side of the fixed plate away from the controller body, the fixed plates are arranged on both sides of the heat conducting plate, an extension plate is fixed on the middle part of the outer side of the fixed plate away from the controller body, a telescopic cylinder is fixed on one side of the extension plate, a plurality of fixed heat sinks distributed at equal intervals are arranged between the two fixed plates, and the fixed heat sinks are fixed on the heat conducting plate.

4. The heat dissipation structure of the automotive high-pressure water heating PTC heating controller according to claim 1 is characterized by: The movable heat sink includes a movable cover arranged on the outside of the fixed heat sink, two ends of the movable cover are respectively inserted into slots on two fixed plates, the movable cover and the fixed plates cooperate to form an air duct, a second fan is fixed on the inner wall of one end of the movable plate, the second fan is staggered with the first fan, convex plates are fixed on the outside of both sides of the movable plate, the convex plates are fixed to the output rod of the telescopic cylinder, a plurality of movable heat sinks distributed at equal intervals are fixed on the inner wall of the movable plate, the movable heat sinks are staggered and fitted with the fixed heat sinks.

5. A heat dissipation method for a PTC heating controller for a high-pressure water heater of an automobile, based on the heat dissipation structure of the PTC heating controller for a high-pressure water heater of an automobile according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Obtain vehicle operating condition information through the CAN bus, and perform heat dissipation control based on the operating condition. When the vehicle is running at a low speed or stationary and the temperature of the PTC heating controller is higher than the set threshold, start the first fan and the second fan in the heat dissipation duct, and adjust the fan speed according to the temperature deviation through the controller; Step 2: When the battery cooling system has excess cooling capacity, part of the coolant in the water cooling box is introduced into the PTC heating controller cooling system through the heat exchanger, and the flow control valve and temperature sensor are used to achieve energy collaborative heat dissipation to ensure that the normal operation of the battery is not affected; Step 3: After the high-pressure water heating PTC heating controller is started, the circulating pump draws the coolant from the storage tank, absorbs heat through the microchannel heat dissipation channel and returns to the storage tank. The flow sensor and temperature sensor are used to realize the coolant circulation and heat dissipation. When the flow is low, the circulating pump speed is adjusted, and when the temperature is high, the auxiliary heat dissipation device is started; Step 4: Set a temperature monitoring point on the housing of the heating controller. When the air-cooling start temperature is reached, the first fan and the second fan start working, and the fan speed is intelligently adjusted according to the preset temperature-speed curve and combined with the vehicle operating conditions; Step 5: Use an intelligent control system to collect data such as the heating controller temperature, coolant temperature and flow, and fan speed in real time, coordinate the coolant circulation system and the air cooling system, and design an intelligent control valve to adjust the coolant introduction amount according to the PTC heating controller temperature and the battery cooling system load.

6. The heat dissipation method of the automobile high-pressure water heating PTC heating controller according to claim 5 is characterized in that: The first fan and the second fan are both DC brushless fans with a maximum air volume of 500m 3 / h, static pressure is 50Pa, the heat exchanger is a high-efficiency plate heat exchanger, and the heat transfer coefficient reaches 5000W / (m 2 K), the heat exchange area is 0.5m 2 The circulating pump is a high-performance centrifugal pump with a flow rate of 30L / min and a head of 10m.

7. The heat dissipation method of the automobile high-pressure water heating PTC heating controller according to claim 5 is characterized in that: The intelligent control system adopts the NVIDIA Jetson Xavier NX embedded computing platform.

8. The heat dissipation method of the automobile high-pressure water heating PTC heating controller according to claim 5 is characterized in that: The intelligent control valve is an electric regulating valve, and the opening is controlled by a 4-20mA current signal.

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