Intelligent thermal management system and method for energy storage battery

Abstract

The invention relates to the technical field of energy storage heat management, and discloses an intelligent heat management system and method for an energy storage battery, and the system comprises a refrigerant loop, a cooling liquid loop and an electric control system; the refrigerant loop comprises a fan and at least two groups of condensers, the two groups of condensers are oppositely arranged and directly form an included angle, radiating surfaces of the condensers symmetrically face the fan positioned in the middle, the condensers are connected with a screen filter through pipelines to filter cooling liquid, the screen filter is connected with one path of a plate heat exchanger through a pipeline, and the other path of the plate heat exchanger is connected with a heat exchanger. The other path of the plate heat exchanger passes through the compressor and then flows to the condenser to form a circulation path; according to the intelligent heat management system for the energy storage battery, efficient heat transfer and temperature control are achieved by accurately designing all the components and the connection relation of the components. And the problems of thermal runaway, serious battery capacity attenuation, product service life attenuation and the like caused by overhigh temperature in the charging and discharging process of the battery can be effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage thermal management, and in particular to an intelligent thermal management system and method for energy storage batteries. Background Art

[0002] With the rapid development of new energy vehicles, energy storage systems, and portable electronic devices, high energy density and high power density batteries are increasingly being used. However, batteries generate a lot of heat during the charging and discharging process. If thermal management is not carried out in a timely and effective manner, the battery temperature will rise, which will lead to a series of problems, such as battery thermal runaway, capacity attenuation, shortened cycle life, and potential safety hazards. Traditional thermal management systems mainly use single-loop liquid cooling or air cooling to dissipate heat. These methods have the following shortcomings:

[0003] Inefficiency: The single-loop design cannot fully utilize the cooling medium, resulting in low heat dissipation efficiency, especially in high-power density battery applications, where it is difficult to meet the demand for rapid heat dissipation.

[0004] Inaccurate temperature control: Traditional systems often rely on simple switch controls and cannot be accurately adjusted according to the actual temperature of the battery, which can easily cause temperature fluctuations and affect battery performance.

[0005] Inflexible heater control: Traditional PTC heaters control the heating process by directly turning the power on and off. They lack precise power regulation and are difficult to adapt to complex and changing thermal management requirements.

[0006] Poor system reliability: A single cooling method is prone to overheating or overcooling when facing extreme environments or high-load conditions, affecting the stability and reliability of the system.

[0007] Therefore, there is an urgent need for a thermal management system with efficient heat transfer and precise temperature control. Summary of the invention

[0008] One purpose of the present application is to provide an intelligent thermal management system and method for energy storage batteries, specifically designing a dual-circuit liquid-cooled thermal management system, which achieves efficient heat transfer and temperature control by precisely designing each component and their connection relationship, so as to address the deficiencies of traditional thermal management systems in terms of heat dissipation efficiency, temperature control accuracy, heater control flexibility, and system reliability.

[0009] To achieve the above objectives, some embodiments of the present application provide the following aspects:

[0010] In a first aspect, the present application provides an intelligent thermal management system for an energy storage battery, including a refrigerant circuit, a coolant circuit, and an electronic control system;

[0011] The refrigerant circuit includes a fan and at least two groups of condensers, the two groups of condensers are arranged opposite to each other and directly form an angle, and the heat dissipation surfaces thereof are symmetrically oriented toward the fan located in the middle, the condenser is connected to a mesh filter through a pipeline to filter the coolant, the mesh filter is connected to a plate heat exchanger through a pipeline, and the plate heat exchanger passes through a compressor and then flows to the condenser again to form a circulation path;

[0012] The coolant loop includes a water supply tank, a water supply pump and a pressure-suppressing tank. The two ends of the water supply pump are connected to the water supply tank and the pressure-suppressing tank respectively. At least one circulating pump and an electric heater are also installed in the coolant loop. A cylindrical water filter is installed on the way from the coolant loop to the return water end of the unit.

[0013] The electric control system includes a controller, a high- and low-voltage connector and a temperature sensor. The high- and low-voltage connector includes a high-voltage wire harness and a low-voltage wire harness. The controller is connected to the fan, the compressor and the water supply pump through the high-voltage wire harness. The controller is connected to the temperature sensor and the electric heater through the low-voltage wire harness. The controller includes a 485 communication module and a PMW (Pu l se-Width Module on, pulse width modulation) module, used for communication and regulation, a temperature sensor is connected to each of the four PTC heaters, and each temperature sensor is connected to the PWM output end of the PLC through a bidirectional thyristor T1-T4, each of the four PTC heaters is connected to the power supply through a contactor, and each contactor is controlled by a relay, the contactors of the PTC heaters are controlled on and off by relays K1-K4, respectively, and are connected to temperature sensors R1-R4, respectively, and are connected to the PLC through bidirectional thyristors, the first main poles of the bidirectional thyristors T1-T4 are connected to the output end of the relay, the second main poles of the bidirectional thyristors T1-T4 are connected to the input end of the PTC heater, the gates of the bidirectional thyristors T1-T4 are connected to the output end of the optocoupler isolator, and the anode of the optocoupler isolator is connected to the PWM output end of the PLC.

[0014] As a preferred technical solution of the present application: one end of the electric heater is connected to the plate heat exchanger to provide heating for the plate heat exchanger.

[0015] As a preferred technical solution of the present application: the cylindrical water filter screen has a mesh size of 50-60 and a built-in water separator.

[0016] As a preferred technical solution of the present application: a condensation pressure sensor and a liquid pipe temperature sensor are also connected between the condenser and the mesh filter.

[0017] As a preferred technical solution of the present application: an electronic expansion valve is also connected between the mesh filter and the plate heat exchanger.

[0018] As a preferred technical solution of the present application: an exhaust temperature sensor and a high-pressure protection switch are also installed between the compressor and the condenser.

[0019] As a preferred technical solution of the present application: an intake pressure sensor and an intake temperature sensor are also installed between the compressor and the plate heat exchanger.

[0020] As a preferred technical solution of the present application: the plate heat exchanger is connected to the water supply end of the unit through a pressure relief valve, a water supply pressure sensor, a water supply temperature sensor, and a water supply pipe drain valve in sequence.

[0021] As a preferred technical solution of the present application: it also includes two compressor heaters for maintaining the compressor temperature and avoiding accumulation of condensate; the cooling module uses six fans to enhance air flow to dissipate heat, and at the same time, plate-type ball valve 1 and plate-type ball valve 2 switch the coolant flow path under the control of the contactor, and cooperate with the plate heat exchanger to complete heat exchange; the water supply ball valve cooperates with the cooling circuit through water pumps 1 to 4 to maintain the liquid level and pressure of the system stable; the return water end of the unit is connected to the circulating pump after passing through the inlet water temperature sensor, the inlet water pressure sensor, and the exhaust valve in sequence.

[0022] As a preferred technical solution of the present application: the electric control system distributes power after entering through the main power supply through the circuit breaker and the fuse. First, the inverter 1 and the inverter 2 respectively control the two main motors M1 and M2 to drive the battery coolant circulation pump to achieve dynamic adjustment of the coolant flow rate; at the same time, four PTC heaters heat the coolant in a low temperature environment, and the contactor controls the start and stop to ensure that the coolant temperature is appropriate; it also includes two compressor heaters to maintain the compressor temperature and avoid condensate accumulation; the cooling module uses six fans to enhance air flow to dissipate heat, and at the same time, the plate-changing ball valve 1 and the plate-changing ball valve 2 switch the coolant flow path under the control of the contactor, and cooperate with the plate heat exchanger to complete heat exchange; the water supply ball valve cooperates with the cooling circuit through water pumps 1 to 4 to keep the liquid level and pressure of the system stable; the controller automatically controls the start and stop status of the inverter, electric valve, heater and fan according to the temperature, pressure and other sensor signals, ACDC (Alternating Current-D i rect Cur rent, a power module that converts alternating current (AC) into direct current (DC)) The module converts alternating current into direct current to provide a stable power supply for the entire control circuit;

[0023] In a second aspect, the present application further provides an energy storage battery intelligent thermal management method, which is applied to an energy storage battery intelligent thermal management system in the first aspect, and comprises the following steps:

[0024] S1: The coolant enters the plate heat exchanger through the circulation pump and exchanges heat with the low-temperature refrigerant in the refrigerant circuit. If the coolant temperature is higher than the target value: the compressor starts, the fan is turned on, and the refrigerant circuit works. If the coolant temperature is lower than the target value: the compressor and the fan are turned off;

[0025] S2: When the ambient temperature is low: turn off the compressor and open the Freecooling bypass water valve; ambient cooling replaces the compressor, and the coolant and ambient air perform natural heat exchange. If the ambient temperature rises, exit the Freecooling mode;

[0026] S3: When heating is required, the electric heater starts and the coolant is heated through the plate heat exchanger; when the coolant temperature approaches the target value, the power of the electric heater is reduced to maintain a constant temperature.

[0027] Compared with the prior art, this application has the following beneficial effects:

[0028] The intelligent thermal management system and method for energy storage batteries provided in the present application make full use of the cooling medium and improve the heat dissipation efficiency through a dual-circuit liquid cooling design. Especially in high-power density battery applications, the heat generated by the battery can be quickly removed to keep the battery within a suitable operating temperature range. An intelligent electronic control system is used to perform precise adjustments according to the actual temperature of the battery to avoid temperature fluctuations, extend the service life of the battery, and improve the performance and safety of the battery. The power of the PTC heater is precisely controlled through a PWM module to achieve flexible adjustment of the heater under different working conditions to meet complex and changeable thermal management requirements. Multi-circuit design, intelligent control and multiple sensor monitoring are used to improve the stability and reliability of the system to ensure that the battery can maintain normal operation even in extreme environments or high-load conditions. Precise thermal management reduces energy waste, reduces the operating cost of the system, and reduces the impact on the environment, meeting the requirements of green and sustainable development.

[0029] In summary, the intelligent thermal management system and method for energy storage batteries proposed in this application achieve efficient heat transfer and temperature control by precisely designing various components and their connection relationships, effectively solving problems such as thermal runaway, severe battery capacity decay, and product life decay caused by excessive temperature during the battery charging and discharging process, and has achieved significant beneficial effects in terms of heat dissipation efficiency, temperature control accuracy, heater control flexibility, and system reliability, providing a strong guarantee for the safe and efficient operation of energy storage batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0031] Figure 1 This is the overall system connection diagram of the preferred embodiment of the present application;

[0032] Figure 2 This is an electrical schematic diagram of the control part in the preferred embodiment of the present application;

[0033] Figure 3 This is a control principle diagram of the PTC heater in the preferred embodiment of this application;

[0034] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0035] In the figure: 1. fan; 2. condenser; 3. liquid pipe temperature sensor; 4. condensing pressure sensor; 5. mesh filter; 6. plate heat exchanger; 7. electric heater; 8. pressure regulating tank; 9. circulation pump; 10. water supply tank; 11. cylindrical water filter; 12. high pressure protection switch; 13. exhaust temperature sensor; 14. compressor; 15. suction pressure sensor; 16. electronic expansion valve; 17. heater bypass solenoid valve; 18. pressure relief valve; 19. water supply pressure sensor; 20. water supply temperature sensor; 21. check valve; 22. exhaust valve; 23. water inlet pressure sensor; 24. pressure regulating tank hose direct connector; 25. water inlet temperature sensor; 26. suction temperature sensor; 27. water supply pump. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] For ease of understanding, the specific process of the embodiment of the present application is described below. Figure 1 , an embodiment of the present application provides an intelligent thermal management system for an energy storage battery, including a refrigerant circuit, a coolant circuit and an electronic control system;

[0038] The refrigerant circuit includes a fan 1 and at least two groups of condensers 2. The two groups of condensers 2 are arranged opposite to each other and directly form an angle between them. The heat dissipation surface is symmetrically facing the fan 1 located in the middle. The condenser 2 is connected to the mesh filter 5 through a pipeline to filter the coolant. The mesh filter 5 is connected to the plate heat exchanger 6 through a pipeline. The plate heat exchanger 6 flows to the condenser 2 again after passing through the compressor 14 to form a circulation passage; wherein, the coolant circuit includes a water supply tank 10, a water supply pump 27 and a pressure regulating tank 8. The two ends of the water supply pump 27 are respectively connected to the water supply tank 10 and the pressure regulating tank 8. The pressure regulating tank 8 is connected to the circuit through the pressure regulating tank hose direct connector 24 thereon. At least one circulating pump 9 and an electric heater 7 are also installed in the coolant circuit. A cylindrical water filter 11 is installed on the way where the coolant circuit connects to the return water end of the unit; the cylindrical water filter 11 is 50-60 mesh and has a built-in water separator.

[0039] The electric heater 7 is connected to the water inlet of the plate heat exchanger 6 through a pipeline to provide heating for the plate heat exchanger 6. The electric heater 7 includes four PTC heaters. One end of the electric heater 7 is connected to the plate heat exchanger 6 to provide heating for the plate heat exchanger 6. A condensation pressure sensor 4 and a liquid pipe temperature sensor 3 are also connected between the condenser 2 and the mesh filter 5. An electronic expansion valve 16 is also connected between the mesh filter 5 and the plate heat exchanger 6. An exhaust temperature sensor 13 and a high-pressure protection switch 12 are also installed between the compressor 14 and the condenser 2. An intake pressure sensor 15 and an intake temperature sensor 26 are also installed between the compressor 14 and the plate heat exchanger 6. The plate heat exchanger 6 is connected to the water supply end of the unit through a pressure relief valve 18, a water supply pressure sensor 19, a water supply temperature sensor 20, and a water supply pipe drain valve in sequence. The return water end of the unit is connected to a circulation pump 9 after passing through an inlet water temperature sensor 25, an inlet water pressure sensor 23, and an exhaust valve 22 in sequence. The electric control system includes a controller, high and low voltage connectors and a temperature sensor. A heater bypass solenoid valve 17 is also provided between the pressure relief valve 18 and the electric heater 7 to control the passage of the electric heater 7 .

[0040] The electronic control system includes a controller, high and low voltage connectors and a temperature sensor. The high and low voltage connectors include a high voltage wiring harness and a low voltage wiring harness. The controller is connected to the fan 1, the compressor 14 and the water supply pump 27 through the high voltage wiring harness. The controller is connected to the temperature sensor and the electric heater 7 through the low voltage wiring harness. The controller includes a 485 communication module and a PMW module for communication and adjustment. The controller, high and low voltage connectors and temperature sensors in the electronic control system can achieve precise control of the coolant temperature. Specifically, according to the signal fed back by the temperature sensor, the controller can adjust the working state of the refrigerant circuit and the coolant circuit in real time to ensure that the coolant temperature remains within the target range and avoid the impact of temperature fluctuations on battery performance. Accurate temperature control helps reduce the thermal stress of the battery during the charging and discharging process, thereby extending the battery life.

[0041] The plate heat exchanger 6 is used to exchange heat between the refrigerant circuit and the coolant circuit; the controller in the electronic control system is connected to each component through a high-voltage wiring harness and a low-voltage wiring harness to achieve centralized control. The plate heat exchanger, as a bridge between the refrigerant circuit and the coolant circuit, can efficiently transfer cold or heat to the coolant to achieve rapid response of the system. Under the unified dispatch of the controller, each component works together to exert the best performance and ensure efficient and stable operation of the system.

[0042] Among them, the condenser 2 is divided into two groups, forming a symmetrical arrangement at an angle, and its heat dissipation surface faces the fan 1, and the battery is cooled by cooling air. The fan 1 drives the air flow to improve the heat dissipation efficiency of the condenser 2. The mesh filter 5 is used to filter impurities in the refrigerant circuit and protect subsequent components (such as the plate heat exchanger 6 and the compressor 14). The plate heat exchanger 6 is the core component for heat exchange between the refrigerant and the coolant. The compressor 14 is used to compress the refrigerant gas and increase the pressure and temperature for subsequent condensation. The electronic expansion valve 16 is used to adjust the flow and pressure of the refrigerant and control the refrigeration effect. The condensation pressure sensor 4 and the liquid pipe temperature sensor 3 are used to monitor the refrigerant status and optimize the operation. The suction pressure sensor 15 and the suction temperature sensor 26 are used to monitor the intake status of the compressor. The exhaust temperature sensor 13 is used to monitor the exhaust temperature of the compressor to prevent overheating. The high-pressure protection switch 12 is used for shutdown protection when the system pressure is too high.

[0043] In the coolant loop, the water supply tank 10 is used to store coolant and replenish the liquid lost during the circulation process. The water supply pump 27 is used to pump the coolant in the water supply tank 10 into the loop to maintain the liquid level and pressure. The outlet of the water supply pump 27 is connected to the one-way valve 21 to prevent backflow. The pressure regulating tank 8 is used to balance the system pressure and prevent pressure fluctuations. The circulation pump 9 is used to drive the coolant to flow in the coolant loop. The electric heater 7 is used to provide heat to the coolant in the heating mode. The cylindrical water filter 11 is used to filter impurities in the coolant and protect the circulation pump 9 and the plate heat exchanger 6.

[0044] The water inlet temperature sensor 25 and the water inlet pressure sensor 23 are used to monitor the temperature and pressure of the coolant at the circuit inlet. The water supply pressure sensor 19 and the water supply temperature sensor 20 are used to monitor the coolant status at the circuit outlet. The pressure relief valve 18 and the exhaust valve 22 are used to remove excess pressure or gas from the system to prevent malfunctions.

[0045] The above-mentioned embodiments of the present application adopt a dual-circuit design, including a refrigerant circuit and a coolant circuit. The refrigerant circuit realizes rapid heat dissipation through a fan and a condenser, while the coolant circuit realizes temperature regulation of the battery system through a circulating pump and an electric heater. The dual-circuit design can make more effective use of the cooling medium, especially in high-power density battery applications, and can quickly take away the heat generated by the battery, improving the heat dissipation efficiency, and the refrigerant circuit and the coolant circuit operate independently, and can be flexibly adjusted according to the actual needs of the battery, thereby improving the adaptability and reliability of the system. And by arranging multiple sensors (such as condensing pressure sensor, liquid pipe temperature sensor, exhaust temperature sensor, etc.) in the system, it is used to monitor the operating status of the system. The controller automatically controls the start and stop status of the inverter, electric valve, heater and fan according to the sensor signal. Multi-sensor monitoring can promptly detect and handle abnormal conditions in the system to ensure the stable operation of the system. Intelligent control can dynamically adjust the system according to real-time data to optimize the performance of the system.

[0046] like Figure 2 As shown, the control process of the electronic control system is as follows:

[0047] After entering through the main power supply through the circuit breaker and fuse, the power is distributed. First, the two main motors M1 and M2 are controlled by inverter 1 and inverter 2 respectively to drive the battery coolant circulation pump to achieve dynamic adjustment of the coolant flow rate; at the same time, four PTC heaters heat the coolant in a low temperature environment, and the start and stop are controlled by the contactor to ensure that the coolant temperature is appropriate; it also includes two compressor heaters to maintain the compressor temperature and avoid condensate accumulation; the cooling module uses six fans to enhance air flow to dissipate heat. At the same time, the plate-type ball valve 1 and plate-type ball valve 2 switch the coolant flow path under the control of the contactor, and the plate heat exchanger Cooperate to complete heat exchange; the water supply ball valve cooperates with the cooling circuit through water pumps one to four to maintain the stability of the system's liquid level and pressure; the controller automatically controls the start and stop status of the inverter, electric valve, heater and fan according to temperature, pressure and other sensor signals, and the ACDC module converts AC power into DC power to provide a stable power supply for the entire control circuit; a temperature sensor is connected to each of the four PTC heaters, and each temperature sensor is connected to the PWM output end of the PLC through a bidirectional thyristor T1-T4, and each of the four PTC heaters is connected to the power supply through a contactor, and each contactor is controlled by a relay. Figure 3As shown, the contactors of PTC1-4 are controlled by relays K1-K4 to switch on and off, and are connected to temperature sensors R1-R4 respectively, and are connected to PLC through bidirectional thyristors. Specifically, PLC outputs PWM signals and transmits trigger signals to the gates of bidirectional thyristors through optocouplers. Bidirectional thyristors T1-T4 are turned on according to the phase angle of the trigger signal, adjust the effective value of the alternating current, and change the power of the PTC heater. The temperature sensor collects temperature in real time and feeds it back to the PLC. When the temperature is lower than the set value, the PLC increases the duty cycle of the PWM signal, the conduction time of the bidirectional thyristor is extended, and the output power is increased. When the temperature is close to the set value, the PLC reduces the duty cycle of the PWM signal, the conduction time of the bidirectional thyristor is shortened, and the output power is reduced. In this way, accurate power regulation of the PTC heater can be achieved, while ensuring stable and safe operation of the system.

[0048] The power of the PTC heater can be precisely adjusted through the PWM output of the bidirectional thyristor and the PLC. The PLC outputs a PWM signal, which transmits the trigger signal to the gate of the bidirectional thyristor through the optocoupler isolator, thereby controlling the power of the PTC heater. Accurate power regulation ensures that the PTC heater quickly heats the coolant in a low-temperature environment while avoiding overheating. By precisely controlling the power of the PTC heater, unnecessary energy consumption can be reduced and the energy efficiency of the system can be improved.

[0049] Workflow in different modes:

[0050] 1. Self-circulation mode

[0051] The circulation pump 9 is started, and the coolant circulates at a constant speed in the loop to ensure uniform heat distribution.

[0052] The refrigerant circuit is closed.

[0053] 2. Cooling mode

[0054] The coolant enters the plate heat exchanger 6 through the circulation pump and exchanges heat with the low-temperature refrigerant in the refrigerant circuit.

[0055] If the coolant temperature is higher than the target value:

[0056] The compressor 14 starts, the fan 1 is turned on, and the refrigerant circuit works.

[0057] If the coolant temperature is lower than the target value:

[0058] The compressor 14 and the fan 1 are turned off, and only the circulation pump is running.

[0059] 3. Freecooling mode

[0060] When the ambient temperature is low:

[0061] Turn off the compressor and open the Freecooling bypass water valve.

[0062] Ambient cooling replaces the compressor work, and the coolant exchanges heat with the ambient air naturally.

[0063] If the ambient temperature rises, exit Freecooling mode.

[0064] 4. Heating mode

[0065] The electric heater 7 is started, and the coolant is heated through the plate heat exchanger 6 .

[0066] When the coolant temperature approaches the target value, the electric heater power is reduced to maintain a constant temperature.

[0067] The present application provides an intelligent thermal management method for an energy storage battery, comprising the following steps:

[0068] S1: The coolant enters the plate heat exchanger 6 through the circulation pump and exchanges heat with the low-temperature refrigerant in the refrigerant circuit. If the coolant temperature is higher than the target value: the compressor 14 is started, the fan 1 is turned on, and the refrigerant circuit works. If the coolant temperature is lower than the target value: the compressor 14 and the fan 1 are turned off;

[0069] S2: When the ambient temperature is low: turn off the compressor 14 and open the Freecooling bypass water valve; the ambient cooling replaces the compressor, and the coolant and the ambient air perform natural heat exchange. If the ambient temperature rises, exit the Freecooling mode;

[0070] S3: When heating is required, the electric heater 7 is started, and the coolant is heated through the plate heat exchanger 6; when the coolant temperature approaches the target value, the power of the electric heater 7 is reduced to maintain a constant temperature.

[0071] In addition, some embodiments of the present application also provide an electronic device. The electronic device may be a digital computer in various forms, such as a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, etc. The electronic device may also be a mobile device in various forms, such as a personal digital processing, a cellular phone, a smart phone, a wearable device, and other similar computing devices.

[0072] Figure 4 An exemplary structural diagram of the electronic device is disclosed. Figure 4As shown, the electronic device includes: one or more processors 1101, memory 1102, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple electronic devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Among them, the components shown in this article, their connections and relationships, and their functions are only used as examples, and are not intended to limit the implementation of the present application described and / or required herein.

[0073] The electronic device may further include: an input device 1103 and an output device 1104. The processor 1101, the memory 1102, the input device 1103 and the output device 1104 may be connected via a bus or other means. Figure 3 The example of connecting through bus is taken in the following.

[0074] The input device 1103 can receive input digital or character information, and generate key signal input related to the user settings and function control of the electronic device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick and other input devices. The output device 1104 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The display device may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display and a plasma display. In some embodiments, the display device may be a touch screen.

[0075] To provide interaction with a user, the electronic device may be a computer. The computer has: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0076] In the embodiments of the present application, a computer program / instruction is stored on a computer-readable medium, and when the computer program / instruction is executed by a processor, the steps of the method provided by any one or more of the above embodiments are implemented. The computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently without being assembled into the device. The above computer-readable medium carries one or more computer-readable instructions.

[0077] The memory 1102 can be used as a non-transient computer-readable storage medium, which can be used to store non-transient software programs, non-transient computer executable programs and modules. The processor 1101 executes various functional applications and data processing of the server by running the non-transient software programs, instructions and modules stored in the memory 1102, so as to implement the program instructions / modules corresponding to the method provided by any one or more embodiments in the embodiments of the present application.

[0078] The memory 1102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 1102 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 1102 may optionally include a memory remotely arranged relative to the processor 1101, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0079] It should be noted that the computer-readable medium described in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device.

[0080] Computer readable media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, modules of programs or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0081] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0082] In the above-described embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. For example, it can be implemented by using an application specific integrated circuit (ASIC), a general-purpose computer or any other similar hardware device. In certain embodiments, the software program of the present application can be executed by a processor to implement the above steps or functions. Similarly, the software program of the present application (including relevant data structures) can be stored in a computer-readable recording medium, for example, a RAM memory, a magnetic or optical drive or a floppy disk and similar devices. In addition, some steps or functions of the present application can be implemented by hardware, for example, as a circuit that cooperates with a processor to perform each step or function.

[0083] The computer program product provided in the embodiment of the present application includes one or more computer programs / instructions, and when the computer program / instructions are executed by the processor, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from a computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0084] The flow chart or block diagram in the accompanying drawings shows the possible architecture, function and operation of the equipment, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated system for hardware that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0085] The scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim may also be implemented by one unit or device through software or hardware. The words "first", "second", etc. are only used to distinguish the description, and do not indicate any particular order, nor can they be understood as indicating or implying relative importance.

[0086] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily mention changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims, and the above embodiments should be regarded as exemplary and non-restrictive.

Claims

1. An intelligent thermal management system for energy storage batteries, characterized in that: Including refrigerant circuit, coolant circuit and electronic control system; The refrigerant circuit comprises a fan (1) and at least two groups of condensers (2), the two groups of condensers (2) are arranged opposite to each other and directly form an angle, and their heat dissipation surfaces are symmetrically oriented toward the fan (1) located in the middle, the condenser (2) is connected to a mesh filter (5) through a pipeline to filter the coolant, the mesh filter (5) is connected to a plate heat exchanger (6) through a pipeline, and the plate heat exchanger (6) passes through a compressor (14) and then flows to the condenser (2) again to form a circulation path; The coolant circuit comprises a water supply tank (10), a water supply pump (27) and a pressure-stabilizing tank (8); the two ends of the water supply pump (27) are respectively connected to the water supply tank (10) and the pressure-stabilizing tank (8); at least one circulation pump (9) and an electric heater (7) are also installed in the coolant circuit; a cylindrical water filter (11) is installed on the way where the coolant circuit is connected to the return water end of the unit; the electric heater (7) is connected to the water inlet end of the plate heat exchanger (6) through a pipeline to provide heating for the plate heat exchanger (6); the electric heater (7) comprises four PTC heaters; The electric control system comprises a controller, a high- and low-voltage connector and a temperature sensor. The high- and low-voltage connector comprises a high-voltage wire harness and a low-voltage wire harness. The controller is connected to the fan (1), the compressor (14) and the water supply pump (27) via the high-voltage wire harness. The controller is connected to the temperature sensor and the electric heater (7) via the low-voltage wire harness. The controller comprises a 485 communication module and a PMW module for communication and adjustment. A temperature sensor is connected to each of the four PTC heaters, and each temperature sensor is connected to the PWM output end of the PLC via a bidirectional thyristor T1-T4. Each of the four PTC heaters is connected to a power supply through a contactor, and each contactor is controlled by a relay. The contactors of the PTC heaters are controlled on and off by relays K1-K4, respectively, and are connected to temperature sensors R1-R4, respectively, and are connected to the PLC through bidirectional thyristors. The first main pole of the bidirectional thyristors T1-T4 is connected to the output end of the relay, the second main pole of the bidirectional thyristors T1-T4 is connected to the input end of the PTC heater, the gate of the bidirectional thyristors T1-T4 is connected to the output end of the optocoupler isolator, and the anode of the optocoupler isolator is connected to the PWM output end of the PLC.

2. The intelligent thermal management system for energy storage batteries according to claim 1, characterized in that: The cylindrical water filter (11) has a mesh size of 50-60 and a built-in water separator.

3. The intelligent thermal management system for energy storage batteries according to claim 2 is characterized in that: A condensation pressure sensor (4) and a liquid pipe temperature sensor (3) are also connected between the condenser (2) and the mesh filter (5).

4. The intelligent thermal management system for energy storage batteries according to claim 3 is characterized in that: An electronic expansion valve (16) is also connected between the mesh filter (5) and the plate heat exchanger (6).

5. The intelligent thermal management system for energy storage batteries according to claim 4 is characterized in that: An exhaust temperature sensor (13) and a high-pressure protection switch (12) are also installed between the compressor (14) and the condenser (2).

6. The intelligent thermal management system for energy storage batteries according to claim 5, characterized in that: An intake pressure sensor (15) and an intake temperature sensor (26) are also installed between the compressor (14) and the plate heat exchanger (6).

7. The intelligent thermal management system for energy storage batteries according to claim 6, characterized in that: The plate heat exchanger (6) is connected to the water supply end of the unit via a pressure relief valve (18), a water supply pressure sensor (19), a water supply temperature sensor (20), and a water supply pipe drain valve in sequence.

8. The intelligent thermal management system for energy storage batteries according to claim 7, characterized in that: It also includes two compressor heaters for maintaining the compressor temperature and avoiding condensate accumulation; the cooling module uses six fans to enhance air flow to dissipate heat, while the plate heat exchanger ball valve 1 and the plate heat exchanger ball valve 2 switch the coolant flow path under the control of the contactor, and cooperate with the plate heat exchanger to complete the heat exchange; the water supply ball valve cooperates with the cooling circuit through water pumps 1 to 4 to maintain the liquid level and pressure of the system stable; the return water end of the unit is connected to the circulation pump (9) after passing through the water inlet temperature sensor (25), the water inlet pressure sensor (23), and the exhaust valve (22) in sequence.

9. The intelligent thermal management system for energy storage batteries according to claim 8, characterized in that: The electric control system distributes electricity after entering through the main power supply via the circuit breaker and the fuse. First, the two main motors M1 and M2 are controlled by inverter 1 and inverter 2 respectively to drive the battery coolant circulation pump to achieve dynamic adjustment of the coolant flow rate; at the same time, four PTC heaters heat the coolant in a low temperature environment, and the start and stop are controlled by the contactor to ensure that the coolant temperature is appropriate; the controller automatically controls the start and stop status of the inverter, electric valve, heater and fan according to the signals of each sensor, and the ACDC module converts AC power into DC power to provide a stable power supply for the entire control circuit.

10. An intelligent thermal management method for energy storage batteries, applied to an intelligent thermal management system for energy storage batteries as claimed in claim 9, characterized in that: The steps include: S1: The coolant enters the plate heat exchanger (6) through the circulation pump and exchanges heat with the low-temperature refrigerant in the refrigerant circuit. If the coolant temperature is higher than the target value, the compressor (14) is started, the fan (1) is turned on, and the refrigerant circuit works. If the coolant temperature is lower than the target value, the compressor (14) and the fan (1) are turned off. S2: When the ambient temperature is low: turn off the compressor (14) and open the Freecooling bypass water valve; Ambient cooling replaces the compressor, and the coolant exchanges heat naturally with the ambient air. If the ambient temperature rises, the Freecooling mode is exited; S3: When heating is required, the electric heater (7) is started, and the coolant is heated by the plate heat exchanger (6); when the coolant temperature approaches the target value, the power of the electric heater (7) is reduced to maintain a constant temperature.

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