PCS heat dissipation system, control method, PCS and energy storage system

Abstract

The application relates to the technical field of energy storage, in particular to a PCS heat dissipation system, a control method, a PCS and an energy storage system. The PCS is divided into a first region and a second region. The PCS heat dissipation system comprises a first temperature detection circuit and a first fan group located in the first region, a second temperature detection circuit, a control signal adjusting device and a second fan group located in the second region, and a controller receiving a first temperature signal output by the first temperature detection circuit, adjusting a duty cycle of a first control signal according to the first temperature signal, and outputting the first control signal to the first fan group. The controller outputs a second control signal with a fixed duty cycle to the control signal adjusting device. The control signal adjusting device adjusts a duty cycle of a third control signal according to a second temperature signal and outputs the third control signal to the second fan group. The scheme realizes the internal regional heat dissipation of the PCS and achieves the effect of the internal temperature regional control and adjustment of the PCS.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to a heat dissipation system for a PCS, a control method, a PCS, and an energy storage system. Background Technology

[0002] A Power Conversion System (PCS) is a core component of an energy storage system. Through precise control of the switching devices, it enables energy conversion and bidirectional flow between the energy storage battery and the power grid. In other words, a PCS can convert direct current (DC) to alternating current (AC) and vice versa. Therefore, the PCS plays a crucial role in energy storage systems. However, its stable operation is affected by temperature, making effective heat dissipation a key issue that needs to be addressed. Summary of the Invention

[0003] In view of this, this application provides a heat dissipation system, control method, PCS and energy storage system for PCS, which provides zoned heat dissipation for the internal part of the PCS, thereby achieving the effect of zoned control and regulation of the internal temperature of the PCS.

[0004] In a first aspect, embodiments of the present invention provide a heat dissipation system for a PCS, wherein the PCS is internally divided into a first region and a second region, and the heat dissipation system for the PCS includes: A first temperature detection circuit and a first fan assembly located in the first region; The second temperature detection circuit, the control signal conditioning device, and the second fan assembly are located in the second region; The controller is connected to the first temperature detection circuit and the first fan group in the first area, and to the control signal conditioning device in the second area; The controller receives a first temperature signal output by the first temperature detection circuit, adjusts the duty cycle of the first control signal according to the first temperature signal, and outputs the first control signal to the first fan group. The controller outputs a second control signal with a fixed duty cycle to the control signal adjustment device; The control signal adjustment device receives the second control signal and the second temperature signal output by the second temperature detection circuit, adjusts the duty cycle of the second control signal according to the second temperature signal, and outputs a third control signal to the second fan group.

[0005] In some embodiments, the first region is a core region; The second area is a normal area; The heat dissipation level of the core area is higher than that of the ordinary area.

[0006] In some embodiments, the heat dissipation system of the PCS further includes: a signal selector; The first temperature detection circuit located in the first region is connected to the controller via the signal selector.

[0007] In some embodiments, the heat dissipation system of the PCS further includes: a digital isolator; The controller is connected to the first fan group in the first area and the control signal conditioning device in the second area via the digital isolator.

[0008] In some embodiments, the heat dissipation system of the PCS further includes: a waveform conversion circuit; The waveform conversion circuit is connected to the controller and the control signal conditioning device respectively, and is used to convert the second control signal output by the controller from a square wave to a triangular wave and output it to the control signal conditioning device.

[0009] In some embodiments, the control signal conditioning device includes: a comparator; The input terminal of the comparator is connected to the second temperature detection circuit and the controller, respectively, and the output terminal of the comparator is connected to the second fan group.

[0010] In some embodiments, the number of the second regions is at least one, and the second region includes a plurality of the second temperature detection circuits; the device further includes a competing circuit located in the second region; The output terminals of multiple second temperature detection circuits in the second region are all connected to the input terminal of the competing circuit, and the output terminal of the competing circuit is connected to the input terminal of the control signal adjustment device. The competing circuit competes to output a second temperature signal from among the temperature signals output by multiple second temperature detection circuits.

[0011] In some embodiments, the number of the first regions is at least one, and the first region includes a plurality of the first temperature detection circuits; The controller receives first temperature signals sent by multiple first temperature detection circuits in the first region, adjusts the duty cycle of the first control signal according to the received multiple first temperature signals, and outputs the first control signal with the adjusted duty cycle to the first fan group in the first region.

[0012] Secondly, embodiments of the present invention provide a heat dissipation control method for a PCS, the method being applied to a controller of the PCS, the method comprising: The system receives a first temperature signal from a first temperature detection circuit located in a first region of the PCS. The PCS is internally divided into a first region and a second region. The first region includes a first temperature detection circuit and a first fan group. The second region includes a second temperature detection circuit, a control signal adjustment device, and a second fan group. Adjust the duty cycle of the first control signal according to the first temperature signal; The first control signal with adjusted duty cycle is output to the first fan group in the first region; The control signal adjustment device in the second region outputs a second control signal with a fixed duty cycle, wherein the control signal adjustment device is used to adjust the duty cycle of the second control signal according to the second temperature signal output by the second temperature detection circuit, and outputs a third control signal to the second fan group.

[0013] In some embodiments, the first region is a core region; The second area is a normal area; The heat dissipation level of the core area is higher than that of the ordinary area.

[0014] In some embodiments, the number of the first regions is at least one, and the first region includes a plurality of the first temperature detection circuits; The step of adjusting the duty cycle of the first control signal based on the first temperature signal includes: Receive the first temperature signals sent by the multiple first temperature detection circuits in the first region respectively; The duty cycle of the first control signal is adjusted based on the received multiple first temperature signals; The first control signal, after adjusting the duty cycle, is output to the first fan group in the first area.

[0015] Thirdly, embodiments of the present invention provide a PCS in which a heat dissipation system for the PCS described in the first aspect or any one of the first aspects is deployed.

[0016] Fourthly, embodiments of the present invention provide an energy storage system, including a PCS, wherein the PCS is equipped with a heat dissipation system as described in the first aspect or any one of the first aspects.

[0017] The heat dissipation system, control method, PCS, and energy storage system of the present invention have at least the following beneficial effects: This invention provides a partitioned heat dissipation system for the PCS (Precast Concentrate), achieving effective temperature control and regulation within the PCS. Specifically, the PCS is divided into a first region and a second region. For the first region, the fan speed is dynamically adjusted in real time based on its temperature, ensuring accurate and timely heat dissipation and temperature regulation. For the second region, the fan speed is autonomously adjusted via a control signal adjustment device under the controller's control of the fan's on / off state. This achieves autonomous heat dissipation and temperature regulation for the second region while conserving controller hardware and software resources. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the heat dissipation system of a PCS provided in an embodiment of the present invention; Figure 2 A schematic diagram of another PCS heat dissipation system provided in an embodiment of the present invention; Figure 3 A schematic diagram illustrating the adjustment of the duty cycle of a second control signal based on a second temperature signal, provided as an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating another method for adjusting the duty cycle of a second control signal based on a second temperature signal, provided as an embodiment of the present invention. Figure 5 This is a schematic diagram of a temperature detection circuit provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a waveform conversion circuit provided in an embodiment of the present invention; Figure 7 A schematic diagram of the heat dissipation system of another PCS provided in an embodiment of the present invention; Figure 8 A flowchart of a heat dissipation control method for a PCS provided in an embodiment of the present invention. Detailed Implementation

[0019] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0020] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0021] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] See Figure 1 This is a schematic diagram of a heat dissipation system for a PCS provided in an embodiment of the present invention. Figure 1 As shown, the PCS is internally divided into a first region and a second region. In some embodiments, the PCS can be divided into a first region and a second region based on the importance and / or temperature sensitivity of different components. For example, the region containing important components or temperature-sensitive components can be designated as the first region, while other regions within the PCS can be designated as the second region. In some examples, the region containing the power module, grid-connected relay, and filter inductor can be designated as the first region, while other regions of the PCS can be designated as the second region. In these embodiments, different temperature control strategies can be employed for the first and second regions of the PCS.

[0024] like Figure 1 As shown, the PCS cooling system includes: a first temperature detection circuit and a first fan assembly located in a first region, and a second temperature detection circuit, a control signal conditioning device, and a second fan assembly located in a second region. Additionally, the PCS cooling system also includes a controller, which is connected to the first temperature detection circuit and the first fan assembly in the first region, and is also connected to the control signal conditioning device in the second region.

[0025] exist Figure 1In the heat dissipation system of the PCS shown, a first temperature detection circuit detects the temperature of a first area and outputs a first temperature signal to the controller based on the detection result. A second temperature detection circuit detects the temperature of a second area and outputs a second temperature signal to the control signal adjustment device based on the detection result. The controller receives the first temperature signal output by the first temperature detection circuit, adjusts the duty cycle of a first control signal based on the first temperature signal, and outputs a first control signal with the adjusted duty cycle to the first fan group. That is, the controller controls the operation of the fan group in the first area and adjusts the speed of the fan group in the first area through the first control signal with an adjustable duty cycle. Furthermore, the controller also outputs a second control signal with a fixed duty cycle to the control signal adjustment device in the second area. That is, the duty cycle of the second control signal is a fixed value, and the controller does not adjust the duty cycle of the second control signal. The control signal adjustment device receives the second control signal and the second temperature signal output by the second temperature detection circuit. The control signal adjustment device adjusts the duty cycle of the second control signal based on the second temperature signal and outputs a third control signal to the second fan group based on the adjustment result. The third control signal controls the operation of the second fan group. It can be understood that the controller outputs a second control signal with a fixed duty cycle to the second area. The controller does not adjust the duty cycle of the second control signal output to the second area, that is, the controller does not adjust the speed of the fan group located in the second area. The fan group in the second area adjusts its speed through its corresponding control signal adjustment device.

[0026] In summary, this embodiment of the invention divides the PCS internally into a first region and a second region, employing different temperature control strategies for each. Specifically, for the first region, the controller adjusts the duty cycle of a first control signal based on a first temperature signal of the first region. By adjusting the duty cycle of the first control signal, the fan speed of the first region is adjusted. In this adjustment method, the controller can dynamically adjust the fan speed of the first region based on temperature changes, accurately and promptly dissipating heat from the first region, achieving a more accurate and timely temperature regulation and control effect. For the second region, the controller outputs a second control signal with a fixed duty cycle. The duty cycle of the second control signal is a fixed value, and the controller does not adjust the duty cycle of the second control signal. It can be understood that the controller can control the start and stop of the fan group in the second region through the second control signal, without adjusting the fan speed. This reduces the computational burden on the controller software, and the temperature detection circuit of the second region does not need to be connected to the controller, nor does the controller need to output control signals to the fan group in the second region, thus saving controller interface connection resources. In this embodiment of the invention, although the controller does not directly adjust the fan speed of the second region, a control signal adjustment device is also provided for the second region. This device adjusts the duty cycle of the second control signal based on the temperature signal of the second region, thereby adjusting the fan speed of the second region. Thus, this embodiment of the invention achieves zoned heat dissipation of the PCS's internal temperature, resulting in zoned temperature control. Specifically, for the first region, the fan speed can be dynamically adjusted in real time based on its temperature, ensuring accurate and timely heat dissipation and temperature adjustment. For the second region, the fan speed is autonomously adjusted via the control signal adjustment device while the controller controls the fan's on / off state. This achieves autonomous heat dissipation and temperature adjustment of the second region while conserving controller hardware and software resources.

[0027] In some embodiments, the first region can be referred to as the core region, and the second region as the ordinary region. The heat dissipation level of the core region is higher than that of the ordinary region, meaning the heat dissipation level of the first region is higher than that of the second region. This embodiment of the invention divides the interior of the PCS into a core region and an ordinary region. Different temperature control strategies can be adopted for the core region and the ordinary region respectively, achieving zoned heat dissipation of the PCS's internal temperature and realizing the effect of zoned control and regulation of the PCS's internal temperature.

[0028] See Figure 2This is a schematic diagram of another PCS heat dissipation system provided in an embodiment of the present invention. Figure 2 In the PCS cooling system shown, the first area is called the core area, and the second area is called the normal area. For example... Figure 2 As shown, there are multiple core regions, each corresponding to one of the aforementioned first regions. To distinguish between the core regions, they can be named separately, such as core region A and core region B. Figure 2 As shown, there are multiple ordinary regions, and each ordinary region can correspond to one of the aforementioned second regions. In order to distinguish each ordinary region, each ordinary region can be named separately, such as ordinary region C, ordinary region D, ordinary region E, and ordinary region F.

[0029] like Figure 2 As shown, core area A includes multiple temperature detection circuits, such as temperature detection circuits A1-A4, all of which are connected to the controller. Additionally, core area A also includes fan group A, which is connected to the controller. Core area B also includes multiple temperature detection circuits, such as temperature detection circuits B1-B4, all of which are connected to the controller. Additionally, core area B also includes fan group B, which is connected to the controller. Since the temperature detection circuits in the core areas all need to be connected to control signals, when there are a large number of temperature detection circuits in the core areas, a signal selector can be set up. For example... Figure 2 As shown, the PCS cooling system also includes a signal selector. The first temperature detection circuit (such as temperature detection circuits A1-A4 and B1-B4) located in the core area is connected to the controller through the signal selector, thereby saving controller interface resources.

[0030] like Figure 2 As shown, there are multiple ordinary regions. For any ordinary region (referred to as the first ordinary region, such as ordinary region C, ordinary region D, ordinary region E, or ordinary region F), each ordinary region includes multiple temperature detection circuits. For example, ordinary region C includes temperature detection circuit C1 and temperature detection circuit C2, ordinary region D includes temperature detection circuit D1 and temperature detection circuit D2, ordinary region E includes temperature detection circuit E1 and temperature detection circuit E2, and ordinary region F includes temperature detection circuit F1 and temperature detection circuit F2. In any ordinary region, such as ordinary region C, ordinary region D, ordinary region E, or ordinary region F, a control signal conditioning device is also included, such as... Figure 2As shown, the control signal adjustment device can be implemented as a comparator. The input terminals of the comparator are connected to the second temperature detection circuit and the controller, respectively, and the output terminal of the comparator is connected to the fan group of the normal area. In this embodiment of the invention, the control signal adjustment device corresponding to the normal area is implemented through a comparator, which is simple and convenient to implement and can achieve autonomous temperature adjustment and control of the normal area without occupying the controller's hardware and software resources.

[0031] like Figure 2 As shown, the first ordinary region (such as ordinary region C, ordinary region D, ordinary region E, or ordinary region F) includes multiple second temperature detection circuits. Additionally, the first ordinary region also includes a competing circuit. The output terminals of the multiple second temperature detection circuits in the first ordinary region are all connected to the input terminal of the competing circuit. The output terminal of the competing circuit is connected to the input terminal of the control signal adjustment device. When the control signal adjustment device is implemented as a comparator, the output terminal of the competing circuit is connected to the input terminal of the comparator. The competing circuit is used to compete for the highest value among the temperature signals output by the multiple second temperature detection circuits to output as the second temperature signal to the comparator. In this embodiment of the invention, when the ordinary region includes multiple temperature detection circuits, the higher value among the multiple temperature signals is first determined through the competing circuit. The comparator only needs to adjust the duty cycle of the second control signal according to the higher temperature value, avoiding the adjustment logic disorder caused by multiple temperature signals simultaneously adjusting the second control signal, and simplifying the structure of the heat dissipation system of the PCS in the ordinary region.

[0032] As can be seen from the above description, ordinary region C includes temperature detection circuits C1 and C2. The outputs of temperature detection circuits C1 and C2 are connected to the input of a competing circuit. The output of the competing circuit is connected to the input of a comparator. The input of the comparator is also connected to a controller, and the output of the comparator is connected to fan group C. In ordinary region C, the competing circuit competes to output a second temperature signal from the temperature signals output by temperature detection circuits C1 and C2 to the comparator. The comparator receives the second temperature signal and a second control signal with a fixed duty cycle output by the controller. Based on the second temperature signal and the second control signal, the comparator outputs a second control signal to the fan group, and controls the operation of fan group C through a third control signal. The connection relationships of the temperature detection circuits, competing circuits, comparators, and fan groups in ordinary regions D, E, and F are the same as the deployment and connection relationships of the relevant circuits in ordinary region C, and will not be repeated here.

[0033] Given the different power supply voltages of the fan assembly and the controller, a digital isolator is also included in the heat dissipation system of the PCS in this embodiment of the invention to match the circuits at both ends and to reduce interference from fan operation to the controller. For example... Figure 2As shown, the controller is connected to the first fan group (e.g., fan group A and fan group B) in the core area (e.g., core area A and core area B) via digital isolators, and also connected to the comparators in the ordinary areas (e.g., ordinary area C, ordinary area D, ordinary area E, and ordinary area F) via digital isolators. By designing digital isolators, the circuits at both ends of the fan group and the controller can be matched, and the interference of the fan group operation on the controller can be reduced.

[0034] Furthermore, such as Figure 2 As shown, the PCS cooling system also includes a waveform conversion circuit. The waveform conversion circuit is connected to the controller and the control signal conditioning device (such as a comparator) in the normal area. It is used to convert the second control signal output by the controller from a square wave to a triangular wave and output it to the control signal conditioning device (comparator). Converting the second control signal from a square wave to a triangular wave helps the comparator adjust the duty cycle of the second control signal according to the second temperature signal.

[0035] exist Figure 2 In the heat dissipation system of the PCS shown, the temperature detection circuits of core region A and core region B output temperature signals, referred to as first temperature signals, to the controller through signal selectors. The controller adjusts the duty cycle of a first control signal based on the received multiple first temperature signals and outputs the adjusted first control signal to fan groups A and B in core region A. It can be understood that in this implementation, the controller outputs a single control signal based on the temperature signals of different core regions to synchronously adjust the fans in these multiple core regions, achieving synchronous temperature control of multiple core regions. In some embodiments, after receiving the first temperature signals output by core region A and core region B, the controller uses the same control signal to control the operation of the fan groups in core region A and core region B. In other embodiments, after receiving the first temperature signals from core region A, the controller adjusts the duty cycle of the first control signal based on the respective first temperature signals and outputs the adjusted first control signal to fan group A in core region A to adjust the operation of the fan group in core region A. Similarly, after receiving the first temperature signals from core region B, the controller adjusts the duty cycle of the first control signal based on these signals and outputs the adjusted first control signal to the fan group B in core region B. In this control method, the first control signals used for adjusting the control signals in core region A and core region B can be the same or different signals. Furthermore, one control signal is output for each of core region A and core region B to regulate the temperature. This method allows for targeted temperature regulation of core region A and core region B, making the temperature regulation of the core region more accurate and timely.

[0036] like Figure 2 As shown, in addition to outputting an adjustable duty cycle control signal to the core area, the controller also outputs a second control signal with a fixed duty cycle to the normal area. Figure 2 As shown, the second control signal output by the controller is first output to the digital isolator, and then output to the waveform conversion circuit through the digital isolator. The waveform conversion circuit converts the second control signal from a square wave to a triangular wave, and the triangular wave form of the second control signal is output to the comparators in each general area.

[0037] like Figure 2 As shown, in a normal area, taking normal area C as an example, temperature detection circuits C1 and C2 are connected to a competing circuit. The competing circuit competes for the highest second temperature signal from the temperature signals output by temperature detection circuits C1 and C2, and outputs the second temperature signal to a comparator. The comparator compares the second temperature signal with a triangular wave and outputs a third control signal whose duty cycle changes with the second temperature signal. The third control signal controls the operation of fan group C. Figure 2 In the given example, the temperature control method of the ordinary region DF is the same as that of the ordinary region C, and will not be repeated here.

[0038] like Figure 3 and Figure 4 As shown, the triangular waveform is fixed. When the value of the second temperature signal is large, the duty cycle of the output third control signal is large; when the value of the second temperature signal is small, the duty cycle of the output third control signal is also large. It can be seen that in the normal range, the duty cycle of the control signal is directly proportional to the value of the temperature signal, increasing as the temperature rises and decreasing as the temperature falls. This achieves the effect of adjusting the duty cycle of the control signal in the normal range according to temperature changes. Moreover, this control method does not rely on software adjustments of the controller, saving the controller's hardware and software resources.

[0039] exist Figure 2 In the circuit shown, each ordinary region corresponds to a comparator. In other embodiments, multiple or all ordinary regions may correspond to a single comparator to save hardware resources.

[0040] Combination Figure 2 In the heat dissipation system of the PCS shown, the PCS is divided into multiple core areas and multiple ordinary areas based on the importance and / or temperature sensitivity of different components. The controller adjusts the duty cycle of the control signal based on a software algorithm to adjust the fan speed of the multiple core areas. For the multiple ordinary areas, the controller controls the opening and closing of the fan groups in the multiple ordinary areas by outputting control signals with a fixed duty cycle. The multiple ordinary areas achieve autonomous adjustment and control of the fan speed through a combination of detection circuits and control circuits.

[0041] See Figure 5 This is a schematic diagram of a temperature detection circuit provided in an embodiment of the present invention. Figure 5 The temperature detection circuit shown can be deployed in the core area as the first temperature detection circuit, or in a normal area as the second temperature detection circuit. For example... Figure 5 As shown, the temperature detection circuit includes a thermistor NTC1, which can be deployed in the temperature sampling area of ​​the core area or a general area. VREF is the temperature sampling reference voltage value. Based on the resistance-temperature characteristics of the thermistor NTC1, by adjusting the resistance values ​​of resistors R1, R2, and R5, a temperature-voltage curve with good linearity within the operating temperature range can be obtained. In this temperature-voltage curve, the voltage is directly proportional to the temperature value. This voltage signal, used to indicate the temperature level, is output to the controller, a competing circuit, or a comparator through an amplifier.

[0042] See Figure 6 This is a schematic diagram of a waveform conversion circuit provided in an embodiment of the present invention. Figure 6 As shown, the controller outputs a second control signal with a fixed duty cycle. This control signal should be a square wave. By adjusting the values ​​of resistor R1, capacitor C1, and resistor R3, the second control signal with a fixed duty cycle, such as a PWM wave with a 50% duty cycle, can be converted into a basically symmetrical triangular wave. The converted triangular wave is filtered by resistor R2 and capacitor C2 and then output to the comparator.

[0043] In this embodiment of the invention, the digital isolator and comparator described above can both be implemented using dedicated integrated chips, while the competition circuit can achieve voltage competition through simple parallel connection of diodes.

[0044] See Figure 7 This is a schematic diagram of the heat dissipation system of another PCS provided in an embodiment of the present invention. Figure 7 As shown, in core areas A and B, the temperature signals output by the temperature sampling circuit are sent to the controller via a signal selector and a follower. The controller outputs a first control signal with a certain frequency and duty cycle based on the received temperature signals. This first control signal is then output to the corresponding fan groups A and B via a digital isolator to adjust the fan speeds of fan group A in core area A and fan group B in core area B. Figure 7As shown, the controller also outputs a second control signal with the same frequency and a 50% duty cycle to the waveform conversion circuit. The waveform conversion circuit converts the second control signal from a square wave to a symmetrical triangular wave and outputs it to one end of the comparator corresponding to each fan group in the normal zone CF. The other end of the normal zone CF receives the temperature signal output by each zone. The comparator compares the symmetrical triangular wave with the temperature signal and generates a third control signal with a different duty cycle that varies with the temperature. This third control signal is then output to the fan group in its corresponding normal zone to adjust the fan speed. In some embodiments, when the system is shut down or cooling is not required, the controller can directly output a low level (0% duty cycle) to stop the fan operation. In some embodiments, if it is necessary to match fans with different frequencies, the controller only needs to adjust the frequency of the control signal, which can achieve the same function without changing the hardware.

[0045] See Figure 8 The above is a flowchart of a heat dissipation control method for a PCS provided in an embodiment of the present invention. Figure 8 The method shown is applied to Figures 1-7 The method includes the following: (The controller is shown in any circuit.) 201, receiving a first temperature signal sent by a first temperature detection circuit located in a first region of the PCS, wherein the PCS is divided into a first region and a second region, the first region includes a first temperature detection circuit and a first fan group; the second region includes a second temperature detection circuit, a control signal adjustment device and a second fan group.

[0046] 202. Adjust the duty cycle of the first control signal according to the first temperature signal.

[0047] 203, output the first control signal after adjusting the duty cycle to the first fan group in the first area.

[0048] 204. A second control signal with a fixed duty cycle is output to the control signal adjustment device of the second region. The control signal adjustment device is used to adjust the duty cycle of the second control signal according to the second temperature signal output by the second temperature detection circuit, and outputs a third control signal to the second fan group. The third control signal is used to adjust the speed of the second fan group.

[0049] This invention provides a partitioned heat dissipation system for the PCS (Precast Concentrate), achieving effective temperature control and regulation within the PCS. Specifically, the PCS is divided into a first region and a second region. For the first region, the fan speed is dynamically adjusted in real time based on its temperature, ensuring accurate and timely heat dissipation and temperature regulation. For the second region, the fan speed is autonomously adjusted via a control signal adjustment device under the controller's control of the fan's on / off state. This achieves autonomous heat dissipation and temperature regulation for the second region while conserving controller hardware and software resources.

[0050] In some embodiments, the first region can be referred to as the core region, and the second region as the ordinary region. The heat dissipation level of the core region is higher than that of the ordinary region, meaning the heat dissipation level of the first region is higher than that of the second region. This embodiment of the invention divides the interior of the PCS into a core region and an ordinary region. Different temperature control strategies can be adopted for the core region and the ordinary region respectively, achieving zoned heat dissipation of the PCS's internal temperature and realizing the effect of zoned control and regulation of the PCS's internal temperature.

[0051] In some embodiments, the number of first regions is at least one, and each first region includes a plurality of first temperature detection circuits; adjusting the duty cycle of the first control signal according to the first temperature signal includes: receiving first temperature signals respectively sent by the plurality of first temperature detection circuits in the first region; adjusting the duty cycle of the first control signal according to the received plurality of first temperature signals; wherein the first control signal after adjusting the duty cycle is output to the first fan group in the first region.

[0052] This invention also provides a PCS in which the above-mentioned [equipment / system] is deployed. Figures 1-7 The heat dissipation system of any PCS in the figure can use different temperature control strategies to dissipate heat in different zones inside the PCS, thereby achieving the technical effect of zoned temperature control inside the PCS.

[0053] This invention also provides an energy storage system, which includes a PCS, in which the above-mentioned [equipment / system] is deployed. Figures 1-7 The heat dissipation system of any PCS in the figure can employ different temperature control strategies to achieve zoned heat dissipation within the PCS, thus achieving the technical effect of zoned temperature control within the PCS. Optionally, the energy storage system can also be connected to the power grid, energy storage batteries, etc., to supply power to electrical equipment through the PCS, or to store electrical energy from the power grid in the energy storage batteries.

[0054] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the device embodiments and terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A heat dissipation system for a PCS, characterized in that, The PCS is internally divided into a first region and a second region. The heat dissipation system of the PCS includes: A first temperature detection circuit and a first fan assembly located in the first region; The second temperature detection circuit, the control signal conditioning device, and the second fan assembly are located in the second region; The controller is connected to the first temperature detection circuit and the first fan group in the first area, and to the control signal conditioning device in the second area; The controller receives a first temperature signal output by the first temperature detection circuit, adjusts the duty cycle of the first control signal according to the first temperature signal, and outputs the first control signal to the first fan group. The controller outputs a second control signal with a fixed duty cycle to the control signal adjustment device; The control signal adjustment device receives the second control signal and the second temperature signal output by the second temperature detection circuit, adjusts the duty cycle of the second control signal according to the second temperature signal, and outputs a third control signal to the second fan group. The first region is the core region; The second area is a normal area; The heat dissipation level of the core area is higher than that of the ordinary area.

2. The heat dissipation system of the PCS according to claim 1, characterized in that, Also includes: Signal selector; The first temperature detection circuit located in the first region is connected to the controller via the signal selector.

3. The heat dissipation system for the PCS according to claim 1, characterized in that, Also includes: Digital isolators; The controller is connected to the first fan group in the first area and the control signal conditioning device in the second area via the digital isolator.

4. The heat dissipation system of the PCS according to claim 1, characterized in that, Also includes: Waveform conversion circuit; The waveform conversion circuit is connected to the controller and the control signal conditioning device respectively, and is used to convert the second control signal output by the controller from a square wave to a triangular wave and output it to the control signal conditioning device.

5. The heat dissipation system of the PCS according to claim 1, characterized in that, The control signal conditioning device includes: a comparator; The input terminal of the comparator is connected to the second temperature detection circuit and the controller, respectively, and the output terminal of the comparator is connected to the second fan group.

6. The heat dissipation system for the PCS according to claim 1, characterized in that, The number of the second region is at least one, and the second region includes a plurality of the second temperature detection circuits; the device also includes a competing circuit located in the second region; The output terminals of multiple second temperature detection circuits in the second region are all connected to the input terminal of the competing circuit, and the output terminal of the competing circuit is connected to the input terminal of the control signal adjustment device. The competing circuit competes to output a second temperature signal from among the temperature signals output by multiple second temperature detection circuits.

7. The heat dissipation system of the PCS according to claim 1, characterized in that, The number of the first regions is at least one, and the first region includes a plurality of the first temperature detection circuits; The controller receives first temperature signals sent by multiple first temperature detection circuits in the first region, adjusts the duty cycle of the first control signal according to the received multiple first temperature signals, and outputs the first control signal with the adjusted duty cycle to the first fan group in the first region.

8. A heat dissipation control method for a PCS, characterized in that, The method is applied to the controller of the PCS, and the method includes: The system receives a first temperature signal from a first temperature detection circuit located in a first region of the PCS. The PCS is internally divided into a first region and a second region. The first region includes a first temperature detection circuit and a first fan group. The second region includes a second temperature detection circuit, a control signal adjustment device, and a second fan group. Adjust the duty cycle of the first control signal according to the first temperature signal; The first control signal with adjusted duty cycle is output to the first fan group in the first region; The control signal adjustment device in the second region outputs a second control signal with a fixed duty cycle, wherein the control signal adjustment device is used to adjust the duty cycle of the second control signal according to the second temperature signal output by the second temperature detection circuit, and outputs a third control signal to the second fan group; The first region is the core region; The second area is a normal area; The heat dissipation level of the core area is higher than that of the ordinary area.

9. The heat dissipation control method for a PCS according to claim 8, characterized in that, The number of the first regions is at least one, and the first region includes a plurality of the first temperature detection circuits; The step of adjusting the duty cycle of the first control signal based on the first temperature signal includes: Receive the first temperature signals sent by the multiple first temperature detection circuits in the first region respectively; The duty cycle of the first control signal is adjusted based on the received multiple first temperature signals; The first control signal, after adjusting the duty cycle, is output to the first fan group in the first area.

10. A PCS, characterized in that, The PCS is equipped with a heat dissipation system according to any one of claims 1-7.

11. An energy storage system, characterized in that, Includes a PCS, wherein the PCS is equipped with a heat dissipation system according to any one of claims 1-7.

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