Two-stage fuzzy heat dissipation system for rolling gate type battery replacement cabinet

Abstract

The utility model relates to a secondary fuzzy heat dissipation system for a rolling gate type battery changing cabinet, which belongs to the field of battery changing cabinets, and comprises an NTC (Negative Temperature Coefficient) temperature sensor, a temperature acquisition circuit, a CPU (Central Processing Unit), a heat dissipation fan driving circuit and a cabinet air conditioner driving circuit, signals processed by the temperature acquisition circuit are transmitted to the CPU, and the CPU outputs control signals to the cooling fan driving circuit and the cabinet air conditioner driving circuit according to calculation results to control the working states of a cooling fan and a cabinet air conditioner respectively. The heat dissipation system can accurately monitor and intelligently regulate and control the internal temperature of the power conversion cabinet, effectively monitor and control the internal temperature of the power conversion cabinet, effectively control the heat dissipation power consumption of an air conditioner of the cabinet, meet the heat dissipation requirement of the power conversion cabinet in a rolling gate mode, and overcome the defects that the heat dissipation system is large in power consumption and short in service life.

Description

Technical Field

[0001] This utility model relates to the field of battery swapping cabinet technology, specifically a two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet. Background Technology

[0002] Traditional battery swapping cabinets using roller shutter doors suffer from poor heat dissipation, mainly due to the following three reasons:

[0003] Firstly, the battery swapping cabinet uses a roller shutter door, which makes it more airtight, but this also makes it difficult for heat to dissipate, resulting in poor heat dissipation.

[0004] Secondly, battery swapping cabinets are usually placed outdoors for extended periods, where they are exposed to prolonged sunlight, causing their internal temperature to rise significantly.

[0005] Third, the battery swapping cabinet is equipped with eight high-power chargers with a power of 1260W. These chargers will generate a lot of heat during operation. When the heat cannot be dissipated in time, the temperature inside the battery swapping cabinet will continue to rise. Once the temperature reaches 55 degrees Celsius, the internal control circuit will not work properly, and the charger will also trigger the over-temperature protection mechanism, ultimately causing the entire battery swapping cabinet to malfunction.

[0006] To address the aforementioned heat dissipation issues, there are currently two main heat dissipation solutions for battery swapping cabinets with roller shutter doors: one is the conventional air-cooling method, but because the battery swapping cabinet is very tightly sealed, there are problems such as poor air circulation, so this air-cooling method cannot meet its heat dissipation requirements; the other is to use a cabinet air conditioner for heat dissipation, but this method has the disadvantages of high power consumption and short service life.

[0007] Given that conventional air cooling cannot meet the heat dissipation requirements due to the tightly sealed nature of the battery swapping cabinet, and that cabinet air conditioning has the drawbacks of high power consumption and short service life, the purpose of this utility model is to provide a brand-new heat dissipation system that can meet the heat dissipation requirements of the rolling shutter door type battery swapping cabinet, and can effectively avoid the drawbacks of existing heat dissipation systems such as high power consumption and short service life. Utility Model Content

[0008] In order to solve the problems in related technologies, this utility model provides a two-stage fuzzy heat dissipation system for roller shutter door-type battery swapping cabinets. This system avoids the problems of high heat dissipation power consumption and short service life of existing heat dissipation systems.

[0009] To solve the above problems, the following technical solutions are provided:

[0010] This utility model discloses a two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet, comprising an NTC temperature sensor, a temperature acquisition circuit, a CPU, a cooling fan drive circuit, and a cabinet air conditioner drive circuit. The NTC temperature sensor transmits the acquired temperature signal to the temperature acquisition circuit, and the signal processed by the temperature acquisition circuit is transmitted to the CPU. The CPU outputs the calculation result as a control signal to the cooling fan drive circuit and the cabinet air conditioner drive circuit, respectively controlling the working status of the cooling fan and the cabinet air conditioner.

[0011] In the above solution, the heat dissipation system can accurately monitor and intelligently regulate the internal temperature of the battery swapping cabinet, effectively monitor and control the internal temperature of the battery swapping cabinet, effectively control the heat dissipation power consumption of the cabinet air conditioner, meet the heat dissipation requirements of the rolling shutter door type battery swapping cabinet, and avoid the drawbacks of high power consumption and short service life of the heat dissipation system.

[0012] In the temperature acquisition circuit, one end of resistor R2 is connected to the power supply, and the other end is connected to capacitor C1 and one end of the NTC temperature sensor. The other end of capacitor C1 is grounded, and the other end of the NTC temperature sensor is connected in series with resistor R1 and then grounded. The CPU's control pin P1.0 is connected between resistor R2 and the NTC temperature sensor. To calculate the temperature value T obtained by the NTC temperature sensor, the voltage at port P1.0 is first calculated, and RN is used as the equivalent resistance of the NTC temperature sensor. Then, based on the relationship between VP and the converted ADC value D: And the conversion relationship between RN and D: And combining the conversion relationship between NTC resistance RN and temperature T: The temperature value T is obtained.

[0013] In the above scheme, the circuit connection and calculation method of this scheme enable the temperature acquisition circuit to accurately obtain the temperature inside the battery swapping cabinet, providing a reliable basis for subsequent control.

[0014] In the cooling fan drive circuit, one end of resistor R3 is connected to the CPU control pin P2.0, and the other end is connected to the base of transistor Q1. The emitter of transistor Q1 is grounded, and the collector is connected to one end of the fan relay coil. The other end of the fan relay coil is connected to the power supply. Diode D1 is connected in parallel across the fan relay coil. Resistor R4 is connected in series between the power supply and the fan relay coil. In the cabinet air conditioner drive circuit, one end of resistor R5 is connected to the CPU control pin P2.1, and the other end is connected to the base of transistor Q2. The emitter of transistor Q2 is grounded, and the collector is connected to one end of the air conditioner relay coil. The other end of the air conditioner relay coil is connected to the power supply. Diode D2 is connected in parallel across the air conditioner relay coil. Resistor R6 is connected in series between the power supply and the air conditioner relay coil.

[0015] In the above solution, the cooling fan drive circuit and the cabinet air conditioner drive circuit, through reasonable component combination, ensure that the CPU can accurately control the operation of the cooling equipment, realize the function of automatically adjusting the cooling according to the temperature, ensure the internal temperature of the battery swapping cabinet is stable, improve the reliability and stability of the battery swapping cabinet, and extend the service life of the equipment in the battery swapping cabinet.

[0016] The NTC temperature sensor has a nominal resistance of 10kΩ, a resistance accuracy of ±1%, a material constant of 3950, and an operating temperature range of -50℃ to 300℃.

[0017] In the above scheme, these parameters enable the NTC temperature sensor to accurately measure temperature in the complex temperature environment of the battery swapping cabinet. Precise nominal resistance, resistance accuracy, and material constants ensure the sensor's sensitive response to temperature changes. Its wide operating temperature range allows it to adapt to the temperature monitoring needs of the battery swapping cabinet under different environmental conditions, thus providing accurate temperature data for the entire heat dissipation system, ensuring the timeliness and effectiveness of heat dissipation control, and preventing damage to the equipment due to excessive temperature.

[0018] The CPU is an STC8A8K64D4 with an internal 12-bit ADC, a program memory of 64kB, and a data memory of 8kB.

[0019] In the above solution, this CPU provides the system with powerful computing and control capabilities. The 12-bit ADC can accurately process the analog signals from the temperature acquisition circuit, converting them precisely into digital signals to ensure the accuracy of temperature measurement. Ample program and data memory space provides a guarantee for the control algorithm and data storage of the heat dissipation system, ensuring that the system can operate efficiently and stably, respond promptly to temperature changes, and make accurate heat dissipation control decisions, thereby improving the overall performance of the heat dissipation system.

[0020] The RC filter circuit consists of resistor R2 and capacitor C1, and is used to filter out high-frequency interference signals in temperature acquisition.

[0021] In the above scheme, the RC filter circuit effectively removes high-frequency interference in temperature acquisition through the combination of resistor R2 and capacitor C1. In the working environment of the battery swapping cabinet, various electromagnetic interferences may exist, which can affect the accuracy of temperature measurement. The presence of the RC filter circuit ensures that the signal acquired by the temperature acquisition circuit is authentic and reliable, providing a stable input signal for subsequent temperature calculation and heat dissipation control, improving the accuracy of temperature monitoring by the heat dissipation system, and thus ensuring the effectiveness of heat dissipation control.

[0022] A series voltage divider circuit is formed by connecting the resistor R1 and the equivalent resistance RN of the NTC temperature sensor in series. This series voltage divider circuit works with the CPU pin P1.0 to convert temperature changes into voltage changes and accurately obtain temperature values.

[0023] In the above scheme, the series voltage divider circuit utilizes the principle of resistor voltage division, working in conjunction with the CPU's P1.0 port to accurately convert the resistance value of the NTC temperature sensor, which changes with temperature, into a voltage signal. Through precise circuit connections and calculations, accurate temperature values ​​are obtained. This design ensures high accuracy in temperature acquisition, enabling the cooling system to effectively control heat dissipation based on accurate temperature information. This avoids improper heat dissipation caused by temperature measurement errors, thereby optimizing the heat dissipation effect and maintaining the internal temperature of the battery swapping cabinet within a suitable range.

[0024] In the cooling fan drive circuit, transistor Q1 controls the on / off state of the fan relay under the action of the CPU control signal, diode D1 is used for circuit protection, and resistors R3 and R4 limit the current to achieve reliable driving of the cooling fan; in the cabinet air conditioner drive circuit, transistor Q2 controls the on / off state of the air conditioner relay under the action of the CPU control signal, diode D2 is used for circuit protection, and resistors R5 and R6 limit the current to achieve reliable driving of the cabinet air conditioner.

[0025] In the above scheme, transistor Q2, under CPU control, precisely controls the operation of the air conditioning relay, realizing the start and stop control of the cabinet air conditioner. Resistors R5 and R6 respectively limit the current flowing into the base of transistor Q2 and the air conditioning relay coil, protecting the circuit components. Diode D2 provides a release path for the back electromotive force when the air conditioning relay coil is de-energized, preventing circuit damage. This drive circuit structure ensures that the cabinet air conditioner can accurately start and stop according to heat dissipation requirements, ensuring the stability and reliability of the cabinet air conditioner drive circuit, enabling the cabinet air conditioner to start cooling in time at high temperatures, maintaining a suitable temperature inside the battery swapping cabinet, and preventing equipment damage due to overheating.

[0026] The above solution has the following advantages:

[0027] This heat dissipation system can accurately monitor and intelligently regulate the internal temperature of the battery swapping cabinet, achieving effective monitoring and control of the internal temperature. The cooling fan drive circuit and the cabinet air conditioner drive circuit, through reasonable component combination, ensure that the CPU can accurately control the operation of the heat dissipation equipment, realizing the function of automatically adjusting the heat dissipation according to the temperature, ensuring the stability of the internal temperature of the battery swapping cabinet, improving the reliability and stability of the battery swapping cabinet, and extending the service life of the equipment inside the battery swapping cabinet. Attached Figure Description

[0028] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0029] Figure 1 This is a hardware system block diagram of the heat dissipation system of this utility model;

[0030] Figure 2 This is a system connection diagram of the heat dissipation system of this utility model;

[0031] Figure 3 This is the control circuit diagram of the heat dissipation system of this utility model;

[0032] Figure 4 This is a system diagram of the internal control software algorithm for the heat dissipation system of this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model discloses a two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet. The heat dissipation system comprises hardware and software components, such as... Figure 1 As shown, the hardware component generally includes an NTC temperature sensor, a temperature acquisition circuit, a CPU, a cooling fan drive circuit, and a rack air conditioning drive circuit, such as... Figure 2 As shown, the NTC temperature sensor transmits the collected temperature signal to the temperature acquisition circuit. The signal processed by the temperature acquisition circuit is then transmitted to the CPU. The CPU outputs the calculation results and control signals to the cooling fan drive circuit and the cabinet air conditioner drive circuit, respectively controlling the working status of the cooling fan and the cabinet air conditioner. Therefore, this heat dissipation system can accurately monitor and intelligently regulate the internal temperature of the battery swapping cabinet, effectively monitor and control the internal temperature of the battery swapping cabinet, and effectively control the heat dissipation power consumption of the cabinet air conditioner. This not only meets the heat dissipation requirements of the roller shutter door type battery swapping cabinet, but also avoids the disadvantages of high power consumption and short service life of the heat dissipation system.

[0035] In this embodiment, to enable the NTC temperature sensor to accurately measure temperature in the complex temperature environment of the battery swapping cabinet, the nominal resistance of the NTC temperature sensor is 10kΩ, the resistance accuracy is ±1%, the material constant is 3950, and the operating temperature range is -50℃ to 300℃. The CPU uses an STC8A8K64D4 with an internal 12-bit ADC, a program memory size of 64kB, and a data memory size of 8kB. The RC filter circuit consists of a resistor R2 and a capacitor C1, used to filter out high-frequency interference signals in temperature acquisition. A series voltage divider circuit is formed by connecting the resistor R1 and the equivalent resistance RN of the NTC temperature sensor in series. This series voltage divider circuit works with the CPU pin P1.0 to convert temperature changes into voltage changes and accurately obtain temperature values.

[0036] The NTC temperature sensor employs precise nominal resistance, resistance accuracy, and material constants to ensure a sensitive response to temperature changes. Its wide operating temperature range allows it to adapt to the temperature monitoring needs of the battery swapping cabinet under different environmental conditions, thereby providing accurate temperature data for the entire heat dissipation system, ensuring the timeliness and effectiveness of heat dissipation control, and preventing damage to the equipment due to excessive temperature.

[0037] Using this CPU model can meet the system's computational needs. Its 12-bit ADC accurately processes the analog signal from the temperature acquisition circuit, converting it precisely into a digital signal to ensure accurate temperature measurement. This guarantees the system's efficient and stable operation, timely response to temperature changes, and accurate heat dissipation control decisions, improving the overall performance of the cooling system. Furthermore, the RC filter circuit, through the combination of resistor R2 and capacitor C1, effectively removes high-frequency interference in temperature acquisition. In the working environment of the battery swapping cabinet, various electromagnetic interferences may exist, affecting the accuracy of temperature measurement. The RC filter circuit ensures the reliability of the signal acquired by the temperature acquisition circuit, providing a stable input signal for subsequent temperature calculations and heat dissipation control, improving the accuracy of temperature monitoring in the cooling system, and thus ensuring the effectiveness of heat dissipation control. The series voltage divider circuit, utilizing the principle of resistor voltage division, works in conjunction with the CPU's P1.0 port to accurately convert the resistance value of the NTC temperature sensor, which changes with temperature, into a voltage signal. Through precise circuit connections and calculations, accurate temperature value acquisition is achieved. This design ensures high accuracy in temperature acquisition, enabling the heat dissipation system to effectively control heat dissipation based on accurate temperature information. This avoids improper heat dissipation caused by temperature measurement errors, thereby optimizing the heat dissipation effect and maintaining the internal temperature of the battery swapping cabinet within a suitable range.

[0038] like Figure 3As shown, in the temperature acquisition circuit described above, one end of resistor R2 is connected to the power supply, and the other end is connected to capacitor C1 and one end of the NTC temperature sensor. The other end of capacitor C1 is grounded, and the other end of the NTC temperature sensor is connected in series with resistor R1 and then grounded. The CPU's control pin P1.0 is connected between resistor R2 and the NTC temperature sensor. To calculate the temperature value T obtained by the NTC temperature sensor, the voltage at port P1.0 is first calculated, and RN is used as the equivalent resistance of the NTC temperature sensor. Then, based on the relationship between VP and the converted ADC value D: And the conversion relationship between RN and D: And combining the conversion relationship between NTC resistance RN and temperature T: The temperature value T is obtained. Utilizing the circuit connections and calculation methods of this scheme, the temperature acquisition circuit can accurately obtain the temperature inside the battery swapping cabinet, providing a reliable basis for subsequent control.

[0039] Furthermore, in the cooling fan drive circuit, one end of resistor R3 is connected to the CPU's control pin P2.0, and the other end is connected to the base of transistor Q1. The emitter of transistor Q1 is grounded, and the collector is connected to one end of the fan relay coil. The other end of the fan relay coil is connected to the power supply. Diode D1 is connected in parallel across the fan relay coil, and resistor R4 is connected in series between the power supply and the fan relay coil. In the cabinet air conditioner drive circuit, one end of resistor R5 is connected to the CPU's control pin P2.1, and the other end is connected to the base of transistor Q2. The emitter of transistor Q2 is grounded, and the collector is connected to one end of the air conditioner relay coil. The other end of the air conditioner relay coil is connected to the power supply. Diode D2 is connected in parallel across the air conditioner relay coil, and resistor R6 is connected in series between the power supply and the air conditioner relay coil. Through a reasonable combination of components, the cooling fan drive circuit and the cabinet air conditioner drive circuit ensure that the CPU can accurately control the operation of the cooling equipment, realize the function of automatically adjusting the cooling according to the temperature, ensure the internal temperature of the battery swapping cabinet is stable, improve the reliability and stability of the battery swapping cabinet, and extend the service life of the equipment inside the battery swapping cabinet.

[0040] Furthermore, in the cooling fan drive circuit, transistor Q1 controls the on / off state of the fan relay under the CPU control signal, diode D1 is used for circuit protection, and resistors R3 and R4 limit current to ensure reliable drive of the cooling fan. In the rack air conditioner drive circuit, transistor Q2 controls the on / off state of the air conditioner relay under the CPU control signal, diode D2 is used for circuit protection, and resistors R5 and R6 limit current to ensure reliable drive of the rack air conditioner. Transistor Q2 precisely controls the operation of the air conditioner relay under CPU control, realizing start-stop control of the rack air conditioner. Resistors R5 and R6 limit the current flowing into the base of transistor Q2 and the coil of the air conditioner relay, respectively, protecting circuit components. Diode D2 provides a release path for the back electromotive force when the air conditioner relay coil is de-energized, preventing circuit damage. This drive circuit structure ensures that the rack air conditioner can accurately start and stop according to the cooling demand, ensuring the stability and reliability of the rack air conditioner drive circuit, enabling the rack air conditioner to start cooling in time at high temperatures, maintaining a suitable temperature inside the swapping cabinet, and preventing equipment damage due to overheating.

[0041] like Figure 4 As shown, the software includes an internal control software algorithm. This algorithm sets the target temperature value 1 to 35℃ and the target temperature value 2 to 45℃. Based on the collected temperature value D, it calculates the temperature errors E1 = D - 35 and E2 = D - 45. Heat dissipation control is then performed based on the temperature error values ​​E and the differential temperature error dE, as well as a fuzzy heat dissipation control expert database. The fuzzy heat dissipation control expert database is generated using a fuzzy algorithm, and the fuzzy algorithm table is as follows:

[0042]

[0043] The empirical control coefficient is:

[0044]

[0045]

[0046] The output control logic is as follows:

[0047] When C1 = 0 and C2 = 0, Q1 = 0 and Q2 = 0; when C1 = 0 and C2 = 1, Q1 = 0 and Q2 = 1; when C1 = 1 and C2 = 0, Q1 = 1 and Q2 = 0; when C1 = 1 and C2 = 1, Q1 = 0 and Q2 = 1, where C1 and C2 are control variables, Q1 controls the cooling fan, and Q2 controls the cabinet air conditioner.

[0048] The steps for generating the fuzzy thermal control expert database are as follows:

[0049] First, based on the empirical analysis of the heat dissipation data of the battery swapping cabinet, the different ranges of temperature error E and temperature error differential value dE are determined, namely NL (negative large), NM (negative medium), NS (negative small), ZO (zero), PS (positive small), PM (positive medium), and PL (positive large).

[0050] Then, based on a large amount of experimental and actual operation data, the heat dissipation control strategy under different combinations of E and dE was determined, and the above fuzzy algorithm table was formed.

[0051] Finally, based on the actual heat dissipation effect and system performance optimization requirements, corresponding empirical control coefficients are set.

[0052] This cooling system combines hardware and software components and has the following advantages:

[0053] 1. Two-stage heat dissipation control is adopted. When the temperature is less than 35 degrees, both fan cooling and air conditioning cooling are turned off. When the temperature is greater than or equal to 35 degrees but less than 45 degrees, fan cooling is used, and the heat dissipation power consumption is small. When the temperature is greater than or equal to 45 degrees, air conditioning cooling is activated. This can meet the heat dissipation requirements of the rolling shutter door type battery swapping cabinet, and avoid the disadvantages of high power consumption and short service life of the heat dissipation system.

[0054] 2. Use a fuzzy expert database to control heat dissipation. When the temperature is less than 35 degrees but the rate of temperature rise (temperature error differential) is too fast, start the fan for heat dissipation in advance. When the temperature is greater than or equal to 35 degrees but less than 45 degrees but the rate of temperature rise (temperature error differential) is too fast, start the air conditioner for heat dissipation in advance. This strategy can stabilize the temperature control and reduce the temperature overshoot.

[0055] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet, characterized in that, It includes an NTC temperature sensor, a temperature acquisition circuit, a CPU, a cooling fan drive circuit, and a rack air conditioner drive circuit. The NTC temperature sensor transmits the acquired temperature signal to the temperature acquisition circuit. The signal processed by the temperature acquisition circuit is transmitted to the CPU. The CPU outputs the calculation result as a control signal to the cooling fan drive circuit and the rack air conditioner drive circuit, respectively controlling the working status of the cooling fan and the rack air conditioner. In the cooling fan drive circuit, one end of resistor R3 is connected to the CPU control pin P2.0, and the other end is connected to the base of transistor Q1. The emitter of transistor Q1 is grounded, and the collector is connected to one end of the fan relay coil. The other end of the fan relay coil is connected to the power supply. Diode D1 is connected in parallel across the fan relay coil. Resistor R4 is connected in series between the power supply and the fan relay coil. In the cabinet air conditioner drive circuit, one end of resistor R5 is connected to the CPU control pin P2.1, and the other end is connected to the base of transistor Q2. The emitter of transistor Q2 is grounded, and the collector is connected to one end of the air conditioner relay coil. The other end of the air conditioner relay coil is connected to the power supply. Diode D2 is connected in parallel across the air conditioner relay coil. Resistor R6 is connected in series between the power supply and the air conditioner relay coil.

2. The two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet according to claim 1, characterized in that, In the temperature acquisition circuit, one end of resistor R2 is connected to the power supply, and the other end is connected to capacitor C1 and one end of NTC temperature sensor. The other end of capacitor C1 is grounded, and the other end of NTC temperature sensor is connected in series with resistor R1 and then grounded. The CPU control pin P1.0 is connected between resistor R2 and NTC temperature sensor.

3. A two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet according to claim 2, characterized in that, The NTC temperature sensor has a nominal resistance of 10kΩ, a resistance accuracy of ±1%, a material constant of 3950, and an operating temperature range of -50℃ to 300℃.

4. A two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet according to claim 2, characterized in that, The CPU is an STC8A8K64D4 with an internal 12-bit ADC, a program memory of 64kB, and a data memory of 8kB.

5. A two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet according to claim 2, characterized in that, The resistor R2 and capacitor C1 form an RC filter circuit, which is used to filter out high-frequency interference signals in temperature acquisition.

6. A two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet according to claim 2, characterized in that, A series voltage divider circuit is formed by connecting the resistor R1 and the equivalent resistance RN of the NTC temperature sensor in series. This series voltage divider circuit works with the CPU pin P1.0 to convert temperature changes into voltage changes and accurately obtain temperature values.

7. A two-stage fuzzy heat dissipation system for a roller shutter-type battery swapping cabinet according to claim 2, characterized in that, In the cooling fan drive circuit, transistor Q1 controls the on / off state of the fan relay under the action of the CPU control signal, diode D1 is used for circuit protection, and resistors R3 and R4 limit the current to achieve reliable driving of the cooling fan; in the cabinet air conditioner drive circuit, transistor Q2 controls the on / off state of the air conditioner relay under the action of the CPU control signal, diode D2 is used for circuit protection, and resistors R5 and R6 limit the current to achieve reliable driving of the cabinet air conditioner.

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