Energy storage cooling device and control method and system therefor

Abstract

The present disclosure provides an energy storage cooling device and a control method and system therefor. The device comprises: a control unit, used for interacting with a battery management system; a main circulation unit, comprising a main pump, a first circulation pipe, a second circulation pipe and a third circulation pipe, wherein the main pump is connected to the control unit and used for conveying low-temperature cooling water to a cooling plate of a cooled unit through the first circulation pipe on the basis of a control instruction, and the second circulation pipe is used for outputting high-temperature cooling water on the cooling plate; and a cooling unit, connected to the control unit and used for cooling the high-temperature cooling water on the basis of a cooling instruction, to obtain low-temperature cooling water, and conveying the low-temperature cooling water to the main pump through the third circulation pipe. The present disclosure improves the control efficiency of the energy storage cooling device, and can be widely applied to the technical field of energy storage cooling.

Description

Energy storage cooling device and control method and system thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2023114002482, filed with the Chinese Patent Office on October 25, 2023, entitled “A Energy Storage Cooling Device and Its Control Method and System,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of energy storage cooling technology, and in particular to an energy storage cooling device and a control method and system thereof. Background Art

[0004] As the capacity and power usage of energy storage battery systems increase, their heat generation also increases. This results in a significant temperature rise during operation. Long-term operation at high temperatures can reduce power performance, accelerate battery aging, and impact the battery's cycle life. Therefore, an energy storage cooling device is needed to cool the battery. Existing energy storage cooling devices have low cooling and control efficiency.

[0005] Summary of the Invention

[0006] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0007] The embodiments of the present disclosure provide an energy storage cooling device and a control method and system thereof, which can effectively improve the control efficiency of the device and improve the cooling efficiency of the device.

[0008] In one aspect, an embodiment of the present disclosure provides an energy storage cooling device, characterized by comprising:

[0009] A control component, configured to interact with a battery management system and obtain control instructions and cooling instructions issued by the battery management system;

[0010] A main circulation component, comprising a main pump, a first circulation pipe, a second circulation pipe, and a third circulation pipe; the main pump is connected to the control component and is used to transport low-temperature cooling water to the cooling plate of the cooled component through the first circulation pipe according to the control instruction; the low-temperature cooling water is converted into high-temperature cooling water after heat exchange on the cooling plate; the second circulation pipe is used to output the high-temperature cooling water on the cooling plate;

[0011] A refrigeration component is connected to the control component and is used to refrigerate the high-temperature cooling water according to the refrigeration instruction to obtain low-temperature cooling water, and transport the low-temperature cooling water to the main pump through the third circulation pipe.

[0012] Optionally, the device further includes a water replenishment component, an air pressure sensor and an expansion tank, the water replenishment component and the air pressure sensor are both connected to the control component, and the expansion tank is connected to the refrigeration component; the air pressure sensor is used to detect the air pressure of the expansion tank, the control component generates a water replenishment signal according to the air pressure of the expansion tank, and the water replenishment component performs a water replenishment operation on the expansion tank according to the water replenishment signal; the expansion tank is used to automatically replenish water to the refrigeration component.

[0013] Optionally, the device also includes a heating component and a water temperature sensor, and both the heating component and the water temperature sensor are connected to the control component; the water temperature sensor is used to detect the water temperature of the high-temperature cooling water on the second circulation pipe, the control component generates a heating signal according to the water temperature of the high-temperature cooling water, and the heating component is used to heat the high-temperature cooling water on the second circulation pipe according to the heating signal.

[0014] Optionally, the device also includes a fault detection component, which is connected to the control component and is used to detect the working status of the air pressure sensor or the water temperature sensor. The control component generates fault information according to the working status of the air pressure sensor or the water temperature sensor and sends the fault information to the battery management system.

[0015] Optionally, the device further includes a switching component and a bus, both of which are connected to the control component; the switching component is used to generate first data information according to the working status of the main circulation component, the refrigeration component, the water replenishment component, the heating component and the fault detection component, and send the first data information to the control component through the bus; the control component sends the first data information to the battery management system, and the first data information includes component status information, remote control signal or online parameter information.

[0016] On the other hand, an embodiment of the present disclosure further provides a control method for an energy storage cooling device, including:

[0017] Obtaining the control instruction issued by the battery management system;

[0018] The control instruction is sent to the main pump; wherein, according to the control instruction, the main pump transports the low-temperature cooling water to the cooling plate of the cooled component through the first circulation pipe, the low-temperature cooling water is converted into high-temperature cooling water after heat exchange on the cooling plate, and the high-temperature cooling water on the cooling plate is output through the second circulation pipe;

[0019] Obtaining the cooling instruction issued by the battery management system;

[0020] The refrigeration instruction is sent to the refrigeration component; wherein the refrigeration component refrigerates the high-temperature cooling water according to the refrigeration instruction to obtain the low-temperature cooling water, and transports the low-temperature cooling water to the main pump through the third circulation pipe.

[0021] Optionally, the control method further includes the following steps:

[0022] Obtaining a temperature difference of a battery cell of the cooled component;

[0023] If the temperature difference of the battery cells is greater than a preset temperature threshold, a main pump start signal is generated, and the main pump is started according to the main pump start signal.

[0024] Optionally, the control method further includes the following steps:

[0025] obtaining the air pressure of the expansion tank;

[0026] If the air pressure of the expansion tank is lower than a preset air pressure threshold, an alarm message is generated and uploaded to the battery management system.

[0027] Optionally, the refrigeration component includes a compressor, and the control method further includes the following steps:

[0028] If the air pressure of the expansion tank is lower than a preset air pressure threshold, an alarm message is generated and uploaded to the battery management system;

[0029] Obtaining a first compressor operating state;

[0030] If the working state of the first compressor is stopped, obtaining the stop time point of the first compressor;

[0031] If the first compressor stop time point meets a first preset requirement, a main pump stop signal is generated, and the main pump stops according to the main pump stop signal.

[0032] Optionally, the control method further includes the following steps:

[0033] Obtain the main pump working status, the second compressor stop time point and the preset temperature;

[0034] If the working state of the main pump is started and the stop time point of the second compressor meets the second preset requirement, a compressor start signal is generated, the compressor is started according to the compressor start signal and the speed of the compressor is set to a preset speed threshold;

[0035] After a preset time period, a compressor speed change signal is generated according to the preset temperature, and the compressor changes the compressor speed according to the compressor speed change signal so that the compressor speed meets a third preset requirement;

[0036] obtaining a first condensing pressure of the compressor;

[0037] If the first condensing pressure is higher than a first condensing pressure threshold, a compressor stop signal is generated, and the compressor is stopped according to the compressor stop signal.

[0038] Optionally, the refrigeration component further includes a fan, and the control method further includes the following steps:

[0039] obtaining a second condensing pressure of the compressor;

[0040] If the second condensing pressure reaches a second condensing pressure threshold, a fan start signal is generated, the fan is started according to the fan start signal and the fan speed is set to a first speed ratio;

[0041] If the second condensing pressure is higher than a second condensing pressure threshold, a first speed signal is generated, and the fan speed is set within a range between a first speed ratio and a second speed ratio according to the first speed signal;

[0042] If the second condensing pressure is higher than a third condensing pressure threshold, a second speed signal is generated, and the fan speed is set within a range between a second speed ratio and a third speed ratio according to the second speed signal;

[0043] If the second condensing pressure is higher than a fourth condensing pressure threshold, a third speed signal is generated, and the fan speed is set within a range between a third speed ratio and a fourth speed ratio according to the third speed signal;

[0044] If the second condensing pressure is higher than a fifth condensing pressure threshold, a fourth speed signal is generated, and the fan speed is set within a range between a fourth speed ratio and a fifth speed ratio according to the fourth speed signal;

[0045] Obtaining the working status of the second compressor;

[0046] If the second condensing pressure is higher than the first condensing pressure threshold and the working state of the second compressor is stopped, obtaining a stop time point of the third compressor;

[0047] If the third compressor stop time point meets a fourth preset requirement, a fan stop signal is generated, and the fan is stopped according to the fan stop signal.

[0048] Optionally, the control method further includes the following steps:

[0049] According to the air pressure of the expansion tube detected by the air pressure sensor, a water replenishment signal is sent to the water replenishment component, and the water replenishment component performs a water replenishment operation on the expansion tank according to the water replenishment signal; the expansion tank is used to automatically replenish water to the refrigeration component.

[0050] Optionally, the control method further includes the following steps:

[0051] A heating signal is sent to the heating component according to the water temperature of the high-temperature cooling water on the second circulation pipe detected by the water temperature sensor, and the heating component is used to heat the high-temperature cooling water on the second circulation pipe according to the heating signal.

[0052] Optionally, the control method further includes the following steps:

[0053] Fault information is sent to the battery management system according to the working status of the air pressure sensor or the water temperature sensor detected by the fault detection component.

[0054] On the other hand, an embodiment of the present disclosure further provides a control system for an energy storage cooling device, characterized by comprising:

[0055] at least one memory for storing a program;

[0056] At least one processor is used to load the program to execute the control method of the energy storage cooling device.

[0057] The beneficial effects of this disclosure are as follows:

[0058] The present disclosure provides an energy storage cooling device, which includes a control component, a main circulation component, and a refrigeration component, wherein the main circulation component includes a main pump, a first circulation pipe, a second circulation pipe, and a third circulation pipe. The control component interacts with a battery management system to obtain control instructions and refrigeration instructions issued by the battery management system, so that the main pump, in accordance with the control instructions, transports low-temperature cooling water to a cooling plate of a cooled component through the first circulation pipe, and after outputting high-temperature cooling water on the cooling plate through the second circulation pipe, the refrigeration component refrigerates the high-temperature cooling water in accordance with the refrigeration instructions to obtain low-temperature cooling water, and transports the low-temperature cooling water to the main pump through the third circulation pipe, thereby improving the cooling efficiency and control efficiency of the device.

[0059] Other features and advantages of the present disclosure will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present disclosure. The purposes and other advantages of the present disclosure can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0061] FIG1 is a schematic diagram of an energy storage cooling device according to an embodiment of the present disclosure;

[0062] FIG2 is a flow chart of a control method for an energy storage cooling device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0063] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0064] In order to make the purpose, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments. The step numbers in the following embodiments are provided only for the convenience of explanation and do not limit the order of the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0065] In the description of this disclosure, "several" means more than one, "plural" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0066] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present disclosure have the same meaning as those commonly understood by those skilled in the art. The terms used in the embodiments of the present disclosure are only for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0067] As shown in Figure 1, an embodiment of the present disclosure provides an energy storage cooling device, comprising a control component 101, a main circulation component, and a refrigeration component 102. The main circulation component includes a main pump 103, a first circulation pipe 104, a second circulation pipe 105, and a third circulation pipe 106. In this embodiment, the control component 101 can interact with the battery management system to obtain control instructions and cooling instructions issued by the battery management system, and can also interact with the main pump or the refrigeration component to send control instructions to the main pump or send cooling instructions to the refrigeration component. The main pump 103 is connected to the control component and can, in accordance with control instructions, transport low-temperature cooling water from the main pump to the cooling plate 107 of the cooled component through the first circulation pipe 104. After heat exchange on the cooling plate, the low-temperature cooling water is converted into high-temperature cooling water. The high-temperature cooling water can be transported from the cooling plate to the refrigeration component through the second circulation pipe 105. The refrigeration component 102 is connected to the control component and can, in accordance with refrigeration instructions, cool the high-temperature cooling water to obtain low-temperature cooling water, which is then transported from the refrigeration component to the main pump through the third circulation pipe 106. It is understandable that the control component may adopt a PLC (Programmable Logic Controller) or other integrated control chips.

[0068] In this embodiment, an energy storage cooling device provided by the disclosed embodiments further includes a water replenishment component 108, an air pressure sensor, and an expansion tank 109. In this embodiment, the water replenishment component and the air pressure sensor are both connected to the control component, and the expansion tank is connected to the refrigeration component. The air pressure sensor can detect the air pressure inside the expansion tank and transmit this pressure information to the control component. The control component can make a judgment based on the air pressure information detected by the air pressure sensor. If the air pressure is below a preset air pressure threshold, it generates a water replenishment signal and transmits it to the water replenishment component. The water replenishment component 108 can generate an audible and visual alarm based on the water replenishment signal, prompting maintenance personnel to replenish water. The maintenance personnel then manually replenish water into the expansion tank using a mobile water replenishment device until the air pressure inside the expansion tank rises and meets the requirements of the system specifications, at which point they stop replenishing water. The expansion tank 109 is internally provided with an air bag. The pressure difference between the water pressure inside the air bag and the air pressure outside the air bag generates pressure to squeeze the water out of the air bag, thereby automatically replenishing the refrigeration component.

[0069] In this embodiment, an energy storage cooling device provided by the present disclosure further includes a heating component 110 and a water temperature sensor. In this embodiment, when the outdoor ambient temperature is extremely low in winter and the cooling component is shut down or operating at low load, the heating component is activated to prevent the high-temperature cooling water in the second circulation pipe from becoming too cold. The heating component is activated when the high-temperature cooling water temperature falls below a preset threshold and the main pump is started; it is deactivated when the high-temperature cooling water temperature rises above the threshold. The preset water temperature threshold can be set using the human-computer interactive touch screen. In this embodiment, both the heating component and the water temperature sensor are connected to a control component. The water temperature sensor detects the temperature of the high-temperature cooling water in the second circulation pipe and transmits this temperature information to the control component. The control component can determine, based on the water temperature information detected by the water temperature sensor, whether the water temperature is below the preset threshold, and generate a heating signal and transmit it to the heating component. For example, if the water temperature is below 10°C, the control component generates a heating signal and transmits it to the heating component. The heating component 110 can heat the high-temperature cooling water in the second circulation pipe based on the heating signal.

[0070] In this embodiment, an energy storage cooling device provided by an embodiment of the present disclosure further includes a fault detection component 111, which is connected to the control component. The fault detection component 111 can detect the working status of the air pressure sensor or the water temperature sensor. If the working status is an abnormal state such as stopped or some components are damaged, the fault detection component will issue an audible and visual alarm and send the working status information to the control component. The control component can generate fault information based on the working status of the air pressure sensor or the water temperature sensor and send the fault information to the battery management system, or it can send the fault information to the human-computer interaction touch screen and display the fault information on the human-computer interaction touch screen. The fault detection component can also stop the audible and visual alarm and continue detection after the air pressure sensor or the water temperature sensor returns to normal working status. In this embodiment, when the water temperature sensor is in an abnormal working state, the heating component stops working.

[0071] In this embodiment, an energy storage cooling device provided by an embodiment of the present disclosure further includes a switch component 112 and a bus 113. In this embodiment, remote control signals with high real-time requirements can be efficiently communicated with the battery management system through the switch component, and component status information and online parameter information with a large amount of information can be efficiently communicated with the control component through the bus, and the MOUDBUS TCP / CAN communication protocol can also be used. In this embodiment, the switch component and the bus are both connected to the control component, and the switch component 112 can generate first data information based on the working status of the main circulation component, the refrigeration component, the water replenishment component, the heating component and the fault detection component, and send the first data information to the control component through the bus 113. The control component can send the first data information to the battery management system. The first data information includes component status information, remote control signals or online parameter information.

[0072] The beneficial effects of implementing the embodiments of the present disclosure include: the present disclosure provides an energy storage cooling device comprising a control component, a main circulation component, and a refrigeration component, wherein the main circulation component comprises a main pump, a first circulation pipe, a second circulation pipe, and a third circulation pipe. The control component interacts with the battery management system to obtain control instructions and refrigeration instructions issued by the battery management system, so that the main pump, in accordance with the control instructions, delivers low-temperature cooling water to the cooling plate of the cooled component through the first circulation pipe. After the high-temperature cooling water on the cooling plate is output through the second circulation pipe, the refrigeration component refrigerates the high-temperature cooling water in accordance with the refrigeration instructions to obtain low-temperature cooling water, and delivers the low-temperature cooling water to the main pump through the third circulation pipe, thereby improving the cooling efficiency and control efficiency of the device. In addition, the device has high safety.

[0073] As shown in FIG2 , the present disclosure also provides a control method for an energy storage cooling device, which can be applied to the control component shown in FIG1 . During application, the method of this embodiment includes but is not limited to the following steps:

[0074] Step S11: Acquire a control instruction issued by the battery management system.

[0075] Step S12: Send the control instruction to the main pump.

[0076] In this embodiment, control instructions can be obtained from the battery management system in a wired or wireless manner and sent to the main pump. The main pump can transport low-temperature cooling water to the cooling plate of the cooled component through the first circulation pipe according to the control instructions obtained from the battery management system. The low-temperature cooling water is converted into high-temperature cooling water after heat exchange on the cooling plate, and the high-temperature cooling water on the cooling plate is output through the second circulation pipe.

[0077] Step S13: Obtain a cooling instruction issued by the battery management system.

[0078] Step S14: Send the cooling instruction to the cooling component.

[0079] In this embodiment, a refrigeration instruction can be obtained from the battery management system in a wired or wireless manner, and the refrigeration instruction can be sent to the refrigeration component. The refrigeration component can cool the high-temperature cooling water according to the refrigeration instruction obtained from the battery management system to obtain low-temperature cooling water, and transport the low-temperature cooling water to the main pump through the third circulation pipe.

[0080] In this embodiment, the refrigeration component includes a compressor, and the control method of the embodiment of the present disclosure further includes the following steps:

[0081] Obtain the temperature difference of the battery cells of the cooled components and the air pressure of the expansion tank.

[0082] If the temperature difference of the battery cells is greater than the preset temperature threshold, a main pump start signal is generated, and the main pump is started according to the main pump start signal.

[0083] If the air pressure in the expansion tank is lower than the preset air pressure threshold, an alarm message is generated and uploaded to the battery management system.

[0084] In this embodiment, the battery management system can obtain the temperature difference of the battery cells of the cooled component and determine the temperature difference. If the temperature difference is greater than a preset temperature threshold, a main pump start signal is generated and sent to the main pump, which can then start according to the main pump start signal. For example, the preset temperature threshold can be set to 3° based on the performance of the cooled component. If the temperature difference is greater than 3°, a main pump start signal is generated and sent to the main pump, which can then start according to the main pump start signal. In this embodiment, the air pressure of the expansion tank can also be obtained by a pressure sensor and determined. If the air pressure of the expansion tank is lower than the preset pressure threshold, an alarm message is generated and uploaded to the battery management system. For example, the preset pressure threshold can be set to 100kPa. If the air pressure of the expansion tank is lower than 100kPa, an alarm message is generated and uploaded to the battery management system.

[0085] Get the working status of the first compressor.

[0086] If the working state of the first compressor is stopped, the stop time point of the first compressor is obtained.

[0087] If the first compressor stop time point meets the first preset requirement, a main pump stop signal is generated, and the main pump stops according to the main pump stop signal.

[0088] In this embodiment, the bus can be used to communicate with the compressor, and the working state of the first compressor can be obtained from the compressor, and the working state of the first compressor can be judged. If the working state of the first compressor is stopped, the first compressor stop time point is obtained, and the first compressor stop time point is judged. If the first compressor stop time point meets the first preset requirement, a main pump stop signal is generated and sent to the main pump, and the main pump can stop according to the main pump stop signal. The first compressor stop time point is used to represent the time point when the working state of the first compressor changes from started to stopped. For example, the first compressor stop time point can be judged. If the first compressor stop time point is 15 seconds before the current time point, a main pump stop signal is generated and sent to the main pump, and the main pump can stop according to the main pump stop signal.

[0089] In this embodiment, the main pump utilizes a single-circulation, shielded pump configuration, offering advantages such as maintenance-free operation and low noise. During normal operation, its flow rate remains constant. Normally, the main pump remains operational even when the cooled component stops. The main pump can also be activated based on the temperature of the low- or high-temperature cooling water. The low-temperature cooling water maintains the core temperature of the cooled component within a preset temperature differential.

[0090] In this embodiment, the control method of the disclosed embodiment further includes the following steps:

[0091] Obtain the main pump working status, the second compressor stop time point and the preset temperature.

[0092] In this embodiment, the bus can be used to communicate with the main pump to obtain the main pump working status from the main pump; the bus can be used to communicate with the compressor to obtain the second compressor stop time point from the compressor, and the second compressor stop time point is used to represent the time point when the second compressor working status changes from started to stopped; the bus can be used to communicate with the human-computer interaction touch screen to obtain the preset temperature from the human-computer interaction touch screen, and the preset temperature can be set through the human-computer interaction touch screen.

[0093] If the main pump is in the started state and the second compressor stop time point meets the second preset requirement, a compressor start signal is generated, the compressor is started according to the compressor start signal and the speed of the compressor is set to the preset speed threshold.

[0094] In this embodiment, the working status of the main pump and the stop time point of the second compressor can be judged. For example, the preset speed threshold can be set to 25%. If the working status of the main pump is started and the stop time point of the second compressor is 3 minutes before the current time point, a compressor start signal is generated and sent to the compressor. The compressor can be started according to the compressor start signal and the speed of the compressor is set to 25% of the rated speed of the compressor. The rated speed of the compressor is used to characterize the maximum speed that the compressor can reach under normal working conditions. More specifically, the speed can be set to 30hz / 1800rpm. After the compressor is started, it can continue to run at this speed for 1 minute.

[0095] After a preset time period, a compressor speed change signal is generated according to a preset temperature, and the compressor changes the compressor speed according to the compressor speed change signal so that the compressor speed meets a third preset requirement.

[0096] In this embodiment, the preset time period can be set to 1 minute. One minute after the compressor is started, a compressor speed change signal can be generated and sent to the compressor based on the preset temperature. The compressor can change the compressor speed based on the compressor speed change signal so that the compressor speed meets the third preset requirement. For example, the preset temperature can be set to 80°C through the human-computer interactive touch screen. When the compressor body temperature is below 80°C, a compressor speed change signal is generated and sent to the compressor. The compressor can increase the speed based on the compressor speed change signal, thereby improving the compressor efficiency. When the compressor body temperature is above 80°C, a compressor speed change signal is generated and sent to the compressor. The compressor can reduce the speed based on the compressor speed change signal, thereby reducing compressor losses and extending its service life. By increasing or decreasing the compressor speed, the compressor body temperature can be maintained within the preset temperature range.

[0097] Get the first condensing pressure of the compressor.

[0098] If the first condensing pressure is higher than the first condensing pressure threshold, a compressor stop signal is generated, and the compressor stops according to the compressor stop signal.

[0099] In this embodiment, communication with the compressor can be performed via a bus to obtain a first condensing pressure of the compressor from the compressor. If the first condensing pressure is higher than a first condensing pressure threshold, a compressor stop signal is generated and sent to the compressor, and the compressor can be stopped according to the compressor stop signal. For example, the first condensing pressure threshold can be set to 41 bar. If the first condensing pressure is higher than 41 bar, a compressor stop signal is generated and sent to the compressor, and the compressor can be stopped according to the compressor stop signal.

[0100] In this embodiment, the refrigeration component further includes a fan, which may be a condensing fan. Based on the fan structure, the control method of the embodiment of the present disclosure further includes the following steps:

[0101] obtaining a second condensing pressure of the compressor;

[0102] In this embodiment, communication with the compressor can be performed via a bus to obtain the second condensing pressure from the compressor.

[0103] If the second condensing pressure reaches the second condensing pressure threshold, a fan start signal is generated, the fan is started according to the fan start signal and the fan speed is set to the first speed ratio;

[0104] For example, the second condensing pressure threshold can be set to 25 bar, and the first speed ratio can be set to 20%. If the second condensing pressure reaches 25 bar, a fan start signal is generated and sent to the fan. The fan can start according to the fan start signal and the fan speed is set to 20% of the fan rated speed. The fan rated speed is used to represent the maximum speed that the fan can reach under normal operation. The fan speed can be set through the human-computer interactive touch screen.

[0105] If the second condensing pressure is higher than the second condensing pressure threshold, a first speed signal is generated, and the fan speed is set within a range between a first speed ratio and a second speed ratio according to the first speed signal;

[0106] For example, the second speed ratio can be set to 50%. If the second condensing pressure is higher than 25 bar, a fan start signal is generated and sent to the fan. The fan can be started according to the fan start signal and the fan speed is set within 20%-50% of the rated speed of the fan.

[0107] If the second condensing pressure is higher than the third condensing pressure threshold, a second speed signal is generated, and the fan speed is set within the range of the second speed ratio and the third speed ratio according to the second speed signal;

[0108] For example, the third condensing pressure threshold can be set to 26 bar, and the third speed ratio can be set to 70%. If the second condensing pressure is higher than 26 bar, a fan start signal is generated and sent to the fan. The fan can be started according to the fan start signal and the fan speed is set within the range of 50%-70% of the rated speed of the fan.

[0109] If the second condensing pressure is higher than the fourth condensing pressure threshold, a third speed signal is generated, and the fan speed is set within a range between the third speed ratio and the fourth speed ratio according to the third speed signal;

[0110] For example, the fourth condensing pressure threshold can be set to 30 bar, and the fourth speed ratio can be set to 80%. If the second condensing pressure is higher than 30 bar, a fan start signal is generated and sent to the fan. The fan can be started according to the fan start signal and the fan speed is set within the range of 70%-80% of the rated speed of the fan.

[0111] If the second condensing pressure is higher than the fifth condensing pressure threshold, a fourth speed signal is generated, and the fan speed is set within a range between the fourth speed ratio and the fifth speed ratio according to the fourth speed signal;

[0112] For example, the fifth condensing pressure threshold can be set to 37 bar, and the fifth speed ratio can be set to 90%. If the second condensing pressure is higher than 37 bar, a fan start signal is generated and sent to the fan. The fan can be started according to the fan start signal and the fan speed is set within 80%-90% of the rated speed of the fan.

[0113] Obtaining the working status of the second compressor;

[0114] If the second condensing pressure is higher than the first condensing pressure threshold and the working state of the second compressor is stopped, obtaining the stop time point of the third compressor;

[0115] If the third compressor stop time point meets the fourth preset requirement, a fan stop signal is generated, and the fan stops according to the fan stop signal.

[0116] In this embodiment, communication with the compressor can be performed via a bus to obtain the second compressor operating status from the compressor. For example, the first condensing pressure threshold can be set to 25 bar. The second condensing pressure and the second compressor operating status can be determined. If the second condensing pressure is greater than 25 bar and the second compressor operating status is stopped, a third compressor stop time point is obtained from the compressor. The third compressor stop time point is used to indicate the time point when the third compressor operating status transitions from started to stopped. The third compressor stop time point can be determined. If the third compressor stop time point is 5 seconds before the current time point, a fan stop signal is generated and sent to the fan, which can then stop according to the fan stop signal.

[0117] In this embodiment, the fans include G01, G02, and G03, wherein G01 includes the first condensing fan and the second condensing fan, G02 includes the third condensing fan and the fourth condensing fan, and G03 includes the fifth condensing fan and the sixth condensing fan. The preset operating temperature range of the refrigeration component of this embodiment is -30°C to 45°C. When the temperature is below -30°C, some electrical components of the refrigeration component will lose their function; when the temperature is above 45°C, the heat dissipation capacity of the refrigeration component will be reduced. It can also work in an environment with a temperature range of 45°C-55°C. The water temperature sensor and air pressure sensor in this embodiment are both installed in a position convenient for maintenance, and can be easily repaired or replaced online.

[0118] The beneficial effects of implementing the embodiments of the present disclosure include: the present disclosure provides a control method for an energy storage cooling device. By obtaining a control instruction from a battery management system and sending the control instruction to a main pump, the main pump, in accordance with the control instruction, delivers low-temperature cooling water to the cooling plate of the cooled component through a first circulation pipe and outputs high-temperature cooling water on the cooling plate through a second circulation pipe. A cooling instruction from the battery management system is then obtained and sent to a cooling component, causing the cooling component to cool the high-temperature cooling water in accordance with the cooling instruction to obtain low-temperature cooling water. The low-temperature cooling water is then delivered to the main pump through a third circulation pipe, thereby improving the cooling efficiency and control efficiency of the device. Furthermore, the safety of the device is also improved.

[0119] In this embodiment, the control method of the disclosed embodiment further includes the following steps:

[0120] According to the air pressure of the expansion tube detected by the air pressure sensor, a water replenishment signal is sent to the water replenishment component, and the water replenishment component replenishes water to the expansion tank according to the water replenishment signal; the expansion tank is used to automatically replenish water to the refrigeration component.

[0121] Specifically, the control component can make a judgment based on the air pressure information detected by the air pressure sensor. If the air pressure is lower than the preset air pressure threshold, a water replenishment signal is generated and sent to the water replenishment component. The water replenishment component can emit an audible and visual alarm based on the water replenishment signal to prompt the operation and maintenance personnel to replenish water. The operation and maintenance personnel use a mobile water replenishment device to manually replenish water into the expansion tank until the air pressure inside the expansion tank increases and meets the requirements of the system specification. The operation and maintenance personnel stop replenishing water. An air bag is provided inside the expansion tank. The pressure difference between the water pressure inside the air bag and the air pressure outside the air bag can be used to generate pressure to squeeze out the water in the air bag, thereby realizing automatic water replenishment of the refrigeration components.

[0122] In this embodiment, the control method of the disclosed embodiment further includes the following steps:

[0123] A heating signal is sent to the heating component according to the water temperature of the high-temperature cooling water on the second circulation pipe detected by the water temperature sensor, and the heating component is used to heat the high-temperature cooling water on the second circulation pipe according to the heating signal.

[0124] Specifically, the water temperature sensor can detect the temperature of the high-temperature cooling water in the second circulation pipe and transmit this water temperature information to the control component. The control component can determine based on the water temperature information detected by the water temperature sensor that if the water temperature is below a preset water temperature threshold, it can generate a heating signal and transmit it to the heating component. The heating component can heat the high-temperature cooling water in the second circulation pipe based on the heating signal.

[0125] In this embodiment, the control method of the disclosed embodiment further includes the following steps:

[0126] According to the working status of the air pressure sensor or water temperature sensor detected by the fault detection component, fault information is sent to the battery management system.

[0127] Specifically, the fault detection component can detect the operating status of the air pressure sensor or water temperature sensor. If the operating status is abnormal, such as stopped or some components are damaged, the fault detection component will issue an audible and visual alarm and send the operating status information to the control component. The control component can generate fault information based on the operating status of the air pressure sensor or water temperature sensor and send the fault information to the battery management system, or it can send the fault information to the human-computer interaction touch screen and display the fault information on the human-computer interaction touch screen. The fault detection component can also stop the audible and visual alarm and continue detection after the air pressure sensor or water temperature sensor returns to normal operating status. In this embodiment, when the water temperature sensor is in an abnormal operating state, the heating component stops working.

[0128] The energy storage cooling device of this embodiment can perform heat exchange on the energy storage battery to reduce the temperature difference of the battery cells in the energy storage battery, thereby reducing the loss of the energy storage battery and increasing the service life of the energy storage battery. This embodiment can control each component in the energy storage cooling device locally or remotely through the control component, and monitor the operating status of each component in the energy storage cooling device and detect faults according to the set parameters. The control method of the energy storage cooling device of this embodiment can automatically adjust the temperature of the high-temperature cooling water, and promptly display the exceeding of the parameters of each component in the energy storage cooling device on the human-computer interactive touch screen, and the warning signal light will light up and a warning alarm will be issued; when the parameters seriously exceed the standard and affect the safe operation of the energy storage battery, it can be promptly displayed on the human-computer interactive touch screen, and the trip alarm signal light will light up and a trip alarm will be issued.

[0129] The present disclosure also provides a control system for an energy storage cooling device, including:

[0130] at least one memory for storing a program;

[0131] At least one processor is used to load a program to execute a control method for an energy storage cooling device shown in FIG2 .

[0132] It can be seen that the contents of the above method embodiments are all applicable to the present system embodiments. The functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0133] The above is a specific description of the preferred implementation of the present disclosure, but the present disclosure is not limited to the above-mentioned implementation mode. Technical personnel familiar with the art can also make various equivalent modifications or substitutions without violating the spirit of the present disclosure. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present disclosure. Industrial Applicability

[0134] In summary, the present disclosure provides an energy storage cooling device and a control method and system thereof, which improve the cooling efficiency and control efficiency of the energy storage cooling device. In addition, the energy storage cooling device has high safety.

Claims

1. An energy storage cooling device, characterized in that: include: A control component, the control component is used to interact with the battery management system to obtain control instructions and cooling instructions issued by the battery management system; A main circulation component, the main circulation component includes a main pump, a first circulation pipe, a second circulation pipe and a third circulation pipe; the main pump is connected to the control component and is used to transport low-temperature cooling water to the cooling plate of the cooled component through the first circulation pipe according to the control instruction; the low-temperature cooling water becomes high-temperature cooling water after the heat exchange of the cooling plate; The second circulation pipe is used to output high-temperature cooling water on the cooling plate; A refrigeration component is connected to the control component and is used to refrigerate the high-temperature cooling water according to the refrigeration instruction to obtain low-temperature cooling water, and transport the low-temperature cooling water to the main pump through the third circulation pipe.

2. The energy storage cooling device according to claim 1, characterized in that: The device also includes a water replenishment component, an air pressure sensor and an expansion tank, the water replenishment component and the air pressure sensor are both connected to the control component, and the expansion tank is connected to the refrigeration component; the air pressure sensor is used to detect the air pressure of the expansion tank, the control component generates a water replenishment signal according to the air pressure of the expansion tank, and the water replenishment component performs a water replenishment operation on the expansion tank according to the water replenishment signal; the expansion tank is used to automatically replenish water to the refrigeration component.

3. The energy storage cooling device according to claim 1, characterized in that: The device also includes a heating component and a water temperature sensor, both of which are connected to the control component; the water temperature sensor is used to detect the water temperature of the high-temperature cooling water on the second circulation pipe, the control component generates a heating signal according to the water temperature of the high-temperature cooling water, and the heating component is used to heat the high-temperature cooling water on the second circulation pipe according to the heating signal.

4. An energy storage cooling device according to claim 2 or 3, characterized in that: The device also includes a fault detection component, which is connected to the control component and is used to detect the working status of the air pressure sensor or the water temperature sensor. The control component generates fault information according to the working status of the air pressure sensor or the water temperature sensor and sends the fault information to the battery management system.

5. The energy storage cooling device according to claim 4, characterized in that: The device further comprises a switch component and a bus, both of which are connected to the control component; the switch component is used to generate first data information according to the working states of the main circulation component, the refrigeration component, the water replenishment component, the heating component and the fault detection component, and send the first data information to the control component through the bus; The control component sends the first data information to the battery management system, where the first data information includes component status information, a remote control signal or online parameter information.

6. A control method for the energy storage cooling device according to any one of claims 1 to 5, characterized in that: include: Obtaining the control instruction issued by the battery management system; The control instruction is sent to the main pump; wherein the main pump transports the low-temperature cooling water to the cooling plate of the cooled component through the first circulation pipe according to the control instruction, the low-temperature cooling water is converted into high-temperature cooling water after the heat exchange of the cooling plate, and the high-temperature cooling water on the cooling plate is output through the second circulation pipe; Obtaining the cooling instruction issued by the battery management system; The refrigeration instruction is sent to the refrigeration component; wherein the refrigeration component refrigerates the high-temperature cooling water according to the refrigeration instruction to obtain the low-temperature cooling water, and transports the low-temperature cooling water to the main pump through the third circulation pipe.

7. A control method for an energy storage cooling device according to claim 6, characterized in that: The control method further comprises the following steps: Obtaining a temperature difference of a battery cell of the cooled component; If the battery cell temperature difference is greater than a preset temperature threshold, a main pump start signal is generated, and the main pump is started according to the main pump start signal.

8. A control method for an energy storage cooling device according to claim 7, characterized in that: The control method further comprises the following steps: Obtaining the air pressure of the expansion tank; If the air pressure of the expansion tank is lower than a preset air pressure threshold, an alarm message is generated and uploaded to the battery management system.

9. The control method of the energy storage cooling device according to claim 7, characterized in that: The refrigeration component includes a compressor, and the control method further includes the following steps: Acquire the working state of the first compressor; If the working state of the first compressor is stopped, obtaining the stop time point of the first compressor; If the first compressor stop time point meets a first preset requirement, a main pump stop signal is generated, and the main pump stops according to the main pump stop signal.

10. A control method for an energy storage cooling device according to claim 9, characterized in that: The control method further comprises the following steps: Obtaining the working status of the main pump, the stop time point of the second compressor and the preset temperature; If the working state of the main pump is started and the stop time point of the second compressor meets the second preset requirement, a compressor start signal is generated, the compressor is started according to the compressor start signal and the speed of the compressor is set to a preset speed threshold; After a preset time period, a compressor speed change signal is generated according to the preset temperature, and the compressor changes the compressor speed according to the compressor speed change signal so that the compressor speed meets a third preset requirement; obtaining a first condensing pressure of the compressor; If the first condensing pressure is higher than a first condensing pressure threshold, a compressor stop signal is generated, and the compressor is stopped according to the compressor stop signal.

11. A control method for an energy storage cooling device according to claim 10, characterized in that: The refrigeration component further includes a fan, and the control method further includes the following steps: obtaining a second condensing pressure of the compressor; If the second condensing pressure reaches a second condensing pressure threshold, a fan start signal is generated, the fan is started according to the fan start signal and the fan speed is set to a first speed ratio; If the second condensing pressure is higher than the second condensing pressure threshold, a first speed signal is generated, and the fan sets the fan speed within a range between a first speed ratio and a second speed ratio according to the first speed signal; If the second condensing pressure is higher than the third condensing pressure threshold, a second speed signal is generated, and the fan sets the fan speed within the range of the second speed ratio and the third speed ratio according to the second speed signal; If the second condensing pressure is higher than a fourth condensing pressure threshold, a third speed signal is generated, and the fan sets the fan speed within a range between a third speed ratio and a fourth speed ratio according to the third speed signal; If the second condensing pressure is higher than the fifth condensing pressure threshold, a fourth speed signal is generated, and the fan sets the fan speed within the range of the fourth speed ratio and the fifth speed ratio according to the fourth speed signal; Acquire the working state of the second compressor; If the second condensing pressure is higher than the first condensing pressure threshold and the working state of the second compressor is stopped, then obtaining a stop time point of the third compressor; If the third compressor stop time point meets a fourth preset requirement, a fan stop signal is generated, and the fan is stopped according to the fan stop signal.

12. The control method of the energy storage cooling device according to any one of claims 6 to 11, characterized in that: The control method further comprises the following steps: According to the air pressure of the expansion tube detected by the air pressure sensor, a water replenishment signal is sent to the water replenishment component, and the water replenishment component performs a water replenishment operation on the expansion tank according to the water replenishment signal; the expansion tank is used to automatically replenish water to the refrigeration component.

13. The control method of the energy storage cooling device according to any one of claims 6 to 11, characterized in that: The control method further comprises the following steps: A heating signal is sent to the heating component according to the water temperature of the high-temperature cooling water on the second circulation pipe detected by the water temperature sensor, and the heating component is used to heat the high-temperature cooling water on the second circulation pipe according to the heating signal.

14. The control method of the energy storage cooling device according to any one of claims 6 to 11, characterized in that: The control method further comprises the following steps: According to the working state of the air pressure sensor or the water temperature sensor detected by the fault detection component, fault information is sent to the battery management system.

15. A control system for an energy storage cooling device, characterized in that: include: at least one memory for storing a program; At least one processor is used to load the program to execute the control method of the energy storage cooling device as described in any one of claims 6-14.

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