Energy storage cold plate type liquid cooling unit control system

Abstract

The invention relates to the technical field of energy storage liquid cooling, in particular to an energy storage cold plate type liquid cooling unit control system which comprises a main controller, a communication module, a switching value acquisition module, a switching value output module, an analog quantity acquisition module and an analog quantity output module. The switching value acquisition module is used for connecting and acquiring a high-voltage switching signal, a low-voltage switching signal, a temperature switching signal, a fan fault feedback signal and the like of the liquid cooling unit and feeding back the signals to the main controller; the switching value output module is used for connecting and transmitting a control signal to a compressor, a water pump and a fan and outputting a fault signal and the like; the analog quantity acquisition module is used for connecting a temperature sensor and a pressure sensor and feeding back acquired data to the main controller; and the analog quantity output module is connected with a water pump speed regulator and a fan speed regulator. According to the invention, multi-path sensor data acquisition can be supported through expansion, and the requirements of convenient connection and maintenance of various different types of sensors and different communication devices of the liquid cooling system are met.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage liquid cooling, and in particular to an energy storage cold plate type liquid cooling unit control system. Background Art

[0002] In the energy storage system, the battery will generate heat during the charging and discharging process, causing the battery temperature to rise. Excessive battery temperature will not only shorten the battery life, but may also cause the battery to burn, seriously affecting the safety and reliability of the battery. Therefore, in order to ensure that the battery operates at a stable temperature, a cooling system must be used to control the battery temperature. The stability and reliability of the cooling system is directly related to the safe operation of the energy storage equipment.

[0003] At present, the commonly used battery cooling methods are mainly air cooling and liquid cooling. Compared with air cooling, liquid cooling has better cooling effect and higher stability, so it has been widely used in energy storage systems. However, in terms of the control of liquid cooling system, there are some problems in the existing technology:

[0004] Functional limitations of single-board controllers: Currently, the controllers of liquid cooling systems mainly use single-board controllers. Although this type of controller can meet basic control requirements to a certain extent, it has obvious deficiencies in functional scalability and maintenance convenience.

[0005] Increased functional requirements: With the development of power Internet of Things technology, the working environment of energy storage systems has become increasingly complex and changeable, and users have put forward higher functional requirements for water cooling products. For example, it is necessary to support multiple sensor data collection, multiple communication interfaces, fault recording, simple program upgrade methods and convenient maintenance.

[0006] Existing single-board controllers cannot meet the needs: Existing single-board controllers have obvious limitations when facing the above diverse needs and cannot meet the actual needs of users. In particular, existing single-board controllers are not competent in supporting multiple sensor data collection, providing multiple communication interfaces, recording fault information, and simplifying program upgrades. Summary of the invention

[0007] In view of the problems of the prior art, the present invention provides an energy storage cold plate liquid cooling unit control system, which can support multi-channel sensor data acquisition through expansion, meeting the needs of convenient connection and maintenance of various types of sensors and different communication equipment in the liquid cooling system.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: a control system of an energy storage cold plate liquid cooling unit, including a main controller, a power supply module, a communication module, a switch quantity acquisition module, a switch quantity output module, an analog quantity acquisition module and an analog quantity output module;

[0009] The power supply module is used to supply power to the main controller;

[0010] The switch quantity acquisition module includes a plurality of switch quantity detection circuits and a plurality of optical coupling acquisition circuits; the plurality of switch quantity detection circuits and the plurality of optical coupling acquisition circuits are used to acquire signals of an external liquid cooling unit, and the output ends of the switch quantity detection circuit and the optical coupling acquisition circuit are connected to the main controller;

[0011] The switch quantity output module includes a plurality of relay output control circuits, the input end of the relay output control circuit is connected to the main controller, the main controller controls the output signal of the relay output control circuit according to the collected data of the switch quantity collection module, the output end of the relay output control circuit is connected to the external liquid cooling unit, and the start and stop of the external liquid cooling unit are controlled by the output signal;

[0012] The analog quantity acquisition module is used to collect pressure and temperature data of the external liquid cooling unit. The output end of the analog quantity acquisition module is connected to the main controller and transmits the collected data to the main controller;

[0013] The input end of the analog output module is connected to the main controller, and the main controller controls the output signal of the analog output module according to the acquisition of the analog acquisition module, and the output end of the analog output module is connected to the water pump and the fan of the external liquid cooling unit;

[0014] The communication module is connected to the controller and is used to exchange data with external devices.

[0015] Preferably, the switch quantity detection circuit includes a switch quantity detection interface, a resistor R45 and a resistor R38, the switch quantity detection interface is connected to the main controller through the resistor R38, and the power supply module is connected to the switch quantity detection interface through the resistor R45;

[0016] The optocoupler acquisition circuit includes an optocoupler acquisition interface, an optocoupler U15, a resistor R15, a resistor R13, and a diode D3. The optocoupler acquisition interface is connected to a control end of the optocoupler U15 through the resistor R15, and the other control end of the optocoupler U15 is connected to the output end of the power supply module. The diode D3 is connected in parallel to the two control ends of the optocoupler U15. A switch end of the optocoupler U15 is connected to the main controller, and a switch end of the optocoupler U15 is connected to the output end of the power supply module through the resistor R13, and the other switch end of the optocoupler U15 is grounded.

[0017] Preferably, the relay output control circuit includes a switching output interface, a relay K2, a resistor R4 and a diode D48, the switching output interface is connected to the main controller through the switch end of the relay K2, one control end of the relay K2 is connected to the output end of the power supply module, the other control end of the relay K2 is connected to the main controller, one control end of the relay K2 is connected to the anode of the diode D48 through the resistor R4, and the cathode of the diode D48 is connected to the other control end of the relay K2.

[0018] Preferably, the analog input module includes a plurality of sensor acquisition circuits, and the plurality of sensor acquisition circuits are used to collect a plurality of pressure data and a plurality of temperature data respectively;

[0019] The sensor acquisition circuit includes a sensor acquisition interface, a diode V9, a capacitor C42, a resistor R70, a resistor NC5 and a resistor NC4. The output end of the sensor acquisition interface is connected to the main controller through the resistor R70, the two ends of the diode V9 are respectively connected to the ground end and the output end of the sensor acquisition interface, the resistor NC4 is connected in parallel with the diode V9, the output end of the sensor acquisition interface is connected to the power supply module through the resistor NC5, one end of the capacitor C42 is connected to the resistor R70, and the other end of the capacitor C42 is grounded.

[0020] Preferably, the analog output module includes multiple analog output circuits, which include an analog output interface, a switch tube Q6, a switch tube Q5, a resistor R136, a resistor R137, a resistor R138 and a resistor R139. The main controller outputs a PWM control signal to the control end of the switch tube Q6 and a switch end of the switch tube Q5. The switch end of the switch tube Q6 is grounded, and the other switch end of the switch tube Q6 is connected to one end of the resistor R137 through the resistor R138. The other end of the resistor R137 is connected to the control end of the switch tube Q5. One end of the resistor R137 is connected to the analog output interface through the resistor R136. A switch end of the switch tube Q5 is grounded through the resistor R139, and the other switch end of the switch tube Q5 is connected to the analog output interface.

[0021] Preferably, the power supply module includes a power supply circuit, which includes a power input module and a power conversion module. The external power supply is connected to the power conversion module through the power input module, and the power conversion module is used to convert the received power signal into a voltage signal for the operation of the back-end device.

[0022] Preferably, the power supply module further includes a power supply detection module, and the power supply detection module is used to detect whether the three-phase voltage of the liquid cooling unit is working normally;

[0023] The power supply detection module includes an optocoupler U17, an optocoupler U18, a diode D10, a diode D12, a resistor R60, a resistor R61 and two resistor units. The three-phase electricity of the liquid cooling unit is provided with three interfaces, the first interface is connected to the anode of the diode D10, the cathode of the diode D19 is connected to a control end of the optocoupler U18 through a resistor unit, the other control end of the optocoupler U18 and a control end of the optocoupler U17 are both connected to the second interface of the three-phase electricity, the third interface of the three-phase electricity is connected to the cathode of the diode D12, the anode of the diode D12 is connected to the other control end of the optocoupler U17 through another resistor unit, a switch end of the optocoupler U18 and a switch end of the optocoupler U17 are both grounded, the other switch end of the optocoupler U18 is connected to the main controller and the other switch end of the optocoupler U18 is connected to the power supply module through the resistor R60, the other switch end of the optocoupler U17 is connected to the main controller and the other switch end of the optocoupler U17 is connected to the power supply module through the resistor R61.

[0024] Preferably, the communication module includes an RS485 communication circuit and a CAN communication circuit, the RS485 communication circuit is used for data transmission communication with an external device, and the CAN communication circuit is used for connecting to an external CAN device and exchanging data with the external device.

[0025] Preferably, the RS485 communication circuit includes a communication controller U10, a capacitor C78, ​​a capacitor C76, a diode D43, a diode D30, a diode D32, a switch tube Q3, a resistor R129, a resistor R108, a resistor R109 and a communication interface JP30;

[0026] The first pin, the second pin, the third pin and the fourth pin of the communication controller U10 are all connected to the main controller, the first pin of the communication controller U10 is grounded through the capacitor C78, ​​the fourth pin of the communication controller U10 is connected to the control end of the switch tube Q3, one switch end of the switch tube Q3 is connected to the power supply module, the other switch end of the switch tube Q3 is connected to the anode of the diode D43, and the cathode of the diode D43 is grounded through the resistor R124;

[0027] The eighth pin of the communication controller U10 is grounded via a capacitor C76, the seventh pin of the communication controller U10 is connected to the communication interface via a resistor R108, and the sixth pin of the communication controller U10 is connected to the communication interface via a resistor R109;

[0028] One end of the diode D30 is connected to the resistor R108 , and the other end of the diode D30 is grounded; one end of the diode D32 is connected to the resistor R109 , and the other end of the diode D32 is grounded.

[0029] Preferably, it also includes an upgrade module, which is connected to the main controller and is used for firmware upgrade.

[0030] Beneficial effects of the present invention:

[0031] 1. Enhanced communication capability: Through the communication module, the liquid cooling unit can exchange data efficiently with a variety of communication devices, enhancing the interconnectivity and compatibility of the system.

[0032] 2. Multi-channel sensor data acquisition: By expanding support for multi-channel sensor data acquisition, it can monitor multiple parameters such as battery temperature, pressure, voltage, etc. in real time, providing reliable data support for precise control of battery working status.

[0033] 3. Improve system reliability: By supporting multiple sensor data collection and multiple communication methods, the reliability of the system is improved; even if some sensors or communication equipment fail, the system can still obtain necessary data through other means to ensure the normal operation of the liquid cooling system.

[0034] 4. Enhanced functional scalability: The switch quantity acquisition module and analog quantity acquisition module enable the liquid cooling system controller to have stronger functional scalability, which can be flexibly configured and adjusted according to actual needs to meet the requirements of different application scenarios.

[0035] 5. Improve system stability: Support multiple sensor data collection and multiple communication interfaces, which improves the overall stability of the system; even in a complex working environment, the system can maintain a good operating state. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a signal block diagram of the present invention;

[0037] Figure 2 It is a circuit principle diagram of the switch quantity acquisition module of the present invention;

[0038] Figure 3 It is a circuit principle diagram of the switch value detection circuit of the present invention;

[0039] Figure 4 It is a circuit principle diagram of the optical coupling acquisition circuit of the present invention;

[0040] Figure 5 It is a circuit principle diagram of the switch value output module of the present invention;

[0041] Figure 6 A circuit schematic diagram of a relay output control circuit of the present invention;

[0042] Figure 7 It is a circuit principle diagram of the analog quantity acquisition module of the present invention;

[0043] Figure 8 It is a circuit principle diagram of the sensor acquisition circuit of the present invention;

[0044] Fig. 9 It is a circuit principle diagram of the analog output module of the present invention;

[0045] Fig.10 is a circuit schematic diagram of the analog output circuit of the present invention;

[0046] Fig.11 is a circuit schematic diagram of the power supply circuit of the present invention;

[0047] Fig.12 is a circuit schematic diagram of a power supply detection circuit of the present invention;

[0048] Fig.13 It is a circuit schematic diagram of the RS485 communication circuit of the present invention;

[0049] Fig.14 It is a circuit schematic diagram of the CAN communication circuit of the present invention;

[0050] Fig.15 is a circuit schematic diagram of the electronic valve expansion control circuit of the present invention;

[0051] Fig.16 is a circuit schematic diagram of the upgrade module of the present invention; DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0053] This embodiment provides a control system for an energy storage cold plate liquid cooling unit, such as Figures 1 to 16 , including a main controller, a power supply module, a communication module, a switch quantity acquisition module, a switch quantity output module, an analog quantity acquisition module and an analog quantity output module; the communication module is connected to the controller and is used to exchange data with external devices. The power supply module is used to power the main controller and other devices that need power supply;

[0054] The switch quantity acquisition module includes a plurality of switch quantity detection circuits and a plurality of optocoupler acquisition circuits; the plurality of switch quantity detection circuits and the plurality of optocoupler acquisition circuits are used to acquire signals of an external liquid cooling unit, and the output ends of the switch quantity detection circuit and the optocoupler acquisition circuit are connected to a main controller; the switch quantity output module includes a plurality of relay output control circuits, the input end of the relay output control circuit is connected to the main controller, the main controller controls the output signal of the relay output control circuit according to the acquisition data of the switch quantity acquisition module, the output end of the relay output control circuit is connected to the external liquid cooling unit, and the start and stop of the external liquid cooling unit are controlled by the output signal;

[0055] The analog quantity acquisition module is used to collect pressure and temperature data of the external liquid cooling unit. The output end of the analog quantity acquisition module is connected to the main controller and transmits the collected data to the main controller; the input end of the analog quantity output module is connected to the main controller, and the main controller controls the output signal of the analog quantity output module according to the collection of the analog quantity acquisition module. The output end of the analog quantity output module is connected to the water pump and fan of the external liquid cooling unit.

[0056] Specifically, the main controller of this embodiment preferably adopts an STM32 chip, and the data is received and processed by the main controller, wherein the switch quantity acquisition module is used to connect and collect the high-pressure switch signal, low-pressure switch signal, temperature switch signal, fan fault feedback signal, water pump feedback signal, etc. of the liquid cooling unit, and feed back to the main controller; the switch quantity output module is used to connect and transmit control signals to the compressor, water pump, fan, heater, compressor, heating belt, four-way valve, solenoid valve and fault signal output signal, etc.; the analog quantity acquisition module is used to connect the temperature sensor and the pressure sensor, and can collect 16 sensor data, and feed back the collected data to the main controller; the analog quantity output module is connected to the water pump speed regulation and the fan speed regulation; the communication module supports 1 CAN communication and 4 RS485 communications, wherein the 4 RS485 interfaces can be set to 1 master station and 3 slave stations, 2 master stations and 2 slave stations according to needs. Combination mode. This embodiment adopts an expandable single-board design, which is compact, easy to install, flexible to expand, highly integrated in functions, easy to upgrade and maintain programs, has good performance, and has a flexible expansion interface. It can meet many requirements of energy storage liquid cooling systems and reduce the manufacturing cost of water cooling system equipment.

[0057] Among them, the switch quantity acquisition module of this embodiment is as follows Figure 2 As shown, it includes multiple switch quantity detection circuits and multiple optical coupling acquisition circuits; wherein the switch quantity detection circuit includes a switch quantity detection interface, a resistor R45 and a resistor R38, the switch quantity detection interface is a two-pin interface, and the switch quantity detection interface is connected to the main controller through the resistor R38, that is, Figure 3 The DI8 signal terminal is connected to the main controller, and the power supply module is connected to the switch detection interface through the resistor R45; the optocoupler acquisition circuit includes an optocoupler acquisition interface, an optocoupler U15, a resistor R15, a resistor R13, and a diode D3. The optocoupler acquisition interface adopts a two-pin interface structure. The optocoupler acquisition interface is connected to a control end of the optocoupler U15 through the resistor R15, and the other control end of the optocoupler U15 is connected to the output end of the power supply module. The diode D3 is connected in parallel to the two control ends of the optocoupler U15, and a switch end of the optocoupler U15 is connected to the main controller, and a switch end of the optocoupler U15 is connected to the output end of the power supply module through the resistor R13, and the other switch end of the optocoupler U15 is grounded. The specific connection method is as follows Figure 4 shown.

[0058] Specifically, the structural principles of the multiple switch quantity detection circuits of this embodiment are the same, and the structural principles of the multiple optical coupling acquisition circuits are also the same. This embodiment only takes one of the switch quantity detection circuits and the optical coupling acquisition module as an example for description. Figure 3 , the switch detection circuit can collect fault feedback signals from external devices (such as water pumps, fans, pressure switches, etc.), where resistor R45 pulls up the resistor to 3.3V. If the input level of the switch detection interface is 0V, the signal detected by the main controller is a low level; if the input level is greater than 3.3V, due to the connection of a 10K pull-up resistor, namely resistor R45, the signal detected by the microcontroller will always be a high level of 3.3V, which can effectively prevent the input level of the microcontroller pin from being too high and burning out the main controller. That is, the switch detection circuit can realize signal detection feedback, determine whether there is a fault signal in the connected device structure, and protect the safety of the main controller. Figure 4 Through the optocoupler acquisition circuit, external high-level or high-speed signal acquisition (water pump PWM control output feedback), waveform period judgment, etc. can be realized; the circuit uses optocoupler U15 to realize the electrical-optical-electrical conversion of the signal, so that the optocoupler U15 can play the role of input isolation, effectively avoiding the interference caused by electrical characteristics and harsh working environment; the optocoupler U15 combines the light-emitting diode and the transistor with mutual insulation, the light-emitting diode is used as the input circuit to convert electrical energy into light energy, and the transistor is used as the output circuit to convert light energy into electrical energy again, realizing the electrical isolation of the two parts, and through the pull-up resistor R13, the transistor of the optocoupler U15 enters the saturation zone as soon as possible, and then transmits the collected signal to the main controller through the DI2 terminal, thereby realizing the acquisition of external high-level and high-speed signals.

[0059] The switch output module of this embodiment is as follows: Figure 5As shown, the structural principles of multiple relay quick output control circuits are the same, and one of them is used as an example for explanation. The relay output control circuit includes a switch output interface, a relay K2, a resistor R4, and a diode D48. The switch output interface is connected to the main controller through the switch end of the relay K2, one control end of the relay K2 is connected to the output end of the power supply module, and the other control end of the relay K2 is connected to the main controller. One control end of the relay K2 is connected to the anode of the diode D48 through the resistor R4, and the cathode of the diode D48 is connected to the other control end of the relay K2. The specific connection method is as follows Figure 6 shown.

[0060] Specifically, Figure 6 The relay output control circuit can control the start and stop of external larger current or voltage equipment through relay K2; diode D48 plays a protective role to prevent reverse voltage from damaging other components when the relay is powered off. By controlling the input voltage type of pin 2 of relay K2, different types of voltage equipment can be driven, that is, compressors, fans, water pumps, solenoid valves and other structures can be driven to start and stop.

[0061] The analog input module of this embodiment is as follows Figure 7 As shown, it includes multiple sensor acquisition circuits, and the multiple sensor acquisition circuits are used to collect multiple pressure and multiple temperature data respectively; the structural principles of the multiple sensor acquisition circuits are the same, and here Figure 8 The sensor acquisition circuit includes a sensor acquisition interface, a diode V9, a capacitor C42, a resistor R70, a resistor NC5 and a resistor NC4. The output end of the sensor acquisition interface is connected to the main controller through the resistor R70. The two ends of the diode V9 are respectively connected to the ground end and the output end of the sensor acquisition interface. The resistor NC4 is connected in parallel with the diode V9. The output end of the sensor acquisition interface is connected to the power supply module through the resistor NC5. One end of the capacitor C42 is connected to the resistor R70, and the other end of the capacitor C42 is grounded. The specific circuit connection method is as follows: Figure 8 shown.

[0062] Specifically, Figure 8The resistor R70 shown is a voltage divider resistor, which provides a stable voltage to the sensor and is used as a voltage divider, effectively expanding the AD sampling value range, and the 3.3V voltage is used as the reference voltage of the circuit; the capacitor C42 plays a filtering role in the circuit, and the capacitor can reduce the noise caused by the power line or other interference, and provide a clear signal to the AD converter; the diode V9 plays a protective role in the acquisition circuit to prevent damage to the sensor or other sensitive components due to power reversal or overvoltage. This embodiment uses multiple sensor acquisition circuits to collect the outlet water pressure, return water pressure, exhaust pressure, suction pressure, outlet water temperature, return water temperature, ambient temperature, suction temperature and exhaust temperature of the liquid cooling system, and transmits the collected signals to the main controller, which can then analyze and determine whether the current liquid cooling system is working normally, and then adjust it through the analog output module.

[0063] The analog output module of this implementation is as follows Fig. 9 As shown, it includes multiple analog output circuits, and the structural principles of multiple analog output circuits are the same. Fig.10 Taking the analog output circuit as an example, the analog output circuit includes an analog output interface, a switch tube Q6, a switch tube Q5, a resistor R136, a resistor R137, a resistor R138 and a resistor R139. Fig. 9 P1 to P5 in the figure are analog output interfaces. The main controller outputs a PWM1 control signal to the control end of the switch tube Q6 and a switch end of the switch tube Q5. A switch end of the switch tube Q6 is grounded. The other switch end of the switch tube Q6 is connected to one end of the resistor R137 through a resistor R138. The other end of the resistor R137 is connected to the control end of the switch tube Q5. One end of the resistor R137 is connected to the analog output interface through a resistor R136. A switch end of the switch tube Q5 is grounded through a resistor R139. The other switch end of the switch tube Q5 is connected to the analog output interface. The specific circuit connection method is as follows: Fig.10 shown.

[0064] Specifically, Fig.10 , the main controller outputs the PWM1 signal, which controls the speed of the water pump or fan through the PWM1 signal; the voltage is +12V or +24V, and different control voltages can be selected through the jumper cap; resistor R138 is used to limit the current of the PWM1 signal and protect the gate of the switch tube Q5; resistor R139 is a pull-down resistor to ensure that the switch tube Q5 remains in the off state when the PWM signal is at a low level; when the PWM1 signal is at a high level, the switch tube Q5 is turned on, and by changing the duty cycle of the output PWM1 signal, the different speeds of the water pump and fan can be controlled; when the PWM1 signal is at a low level, the switch tube Q5 is turned off, and the water pump and fan stop.

[0065] The power supply module of this embodiment includes a power supply circuit and a power detection module. The power supply circuit includes a power input module and a power conversion module. Fig.11 The external power supply is connected to the power conversion module through the power input module, and the power conversion module is used to convert the received power signal into a voltage signal for the back-end device to work. The specific circuit connection method is as follows Fig.11 This power supply circuit uses an external DC24V or AC18V power supply. The 24V power supply is converted into DC12V, DC5V and DC3.3V power supplies through the chip circuit for use by other components of the entire controller; 24V to 12V, an external DC24V power supply is converted into 12V through the RT7272BGSP chip. This circuit can eliminate input current surges during startup, and has output undervoltage protection and overcurrent protection. The 5V voltage is converted into 3.3V voltage through two resistor dividers.

[0066] like Fig.12 As shown, the power supply detection module is used to detect whether the three-phase voltage of the liquid cooling unit is working normally; the power supply detection module includes an optical coupler U17, an optical coupler U18, a diode D10, a diode D12, a resistor R60, a resistor R61 and two resistance units. The three-phase electricity of the liquid cooling unit is provided with three interfaces, the first interface is connected to the anode of the diode D10, the cathode of the diode D19 is connected to a control end of the optical coupler U18 through one of the resistance units, the other control end of the optical coupler U18 and a control end of the optical coupler U17 are both connected to the second interface of the three-phase electricity, and the three-phase The third electrical interface is connected to the cathode of the diode D12, the anode of the diode D12 is connected to the other control end of the optocoupler U17 through another resistor unit, a switch end of the optocoupler U18 and a switch end of the optocoupler U17 are both grounded, the other switch end of the optocoupler U18 is connected to the main controller and the other switch end of the optocoupler U18 is connected to the power supply module through the resistor R60, the other switch end of the optocoupler U17 is connected to the main controller and the other switch end of the optocoupler U17 is connected to the power supply module through the resistor R61, and the specific circuit connection method is as follows Fig.12 Specifically, the circuit can detect whether the three-phase voltage of the entire liquid cooling system is normal, and whether there is a phase error or a phase loss in the power supply.

[0067] The communication module of this embodiment is as follows Figure 1 As shown, it includes an RS485 communication circuit and a CAN communication circuit. The RS485 communication circuit is used for data transmission and communication with external equipment, and the CAN communication circuit is used for connecting to an external CAN equipment and exchanging data with the external equipment.

[0068] Among them, Fig.13The RS485 communication circuit includes a communication controller U10, a capacitor C78, ​​a capacitor C76, a diode D43, a diode D30, a diode D32, a switch tube Q3, a resistor R129, a resistor R108, a resistor R109 and a communication interface JP30; the first pin, the second pin, the third pin and the fourth pin of the communication controller U10 are all connected to the main controller, the first pin of the communication controller U10 is grounded through the capacitor C78, ​​the fourth pin of the communication controller U10 is connected to the control end of the switch tube Q3, and a switch end of the switch tube Q3 is connected to the power supply module The communication controller U10 is connected to the communication interface through the resistor R108, and the sixth pin of the communication controller U10 is connected to the communication interface through the resistor R109; one end of the diode D30 is connected to the resistor R108, and the other end of the diode D30 is grounded; one end of the diode D32 is connected to the resistor R109, and the other end of the diode D32 is grounded.

[0069] Specifically, this circuit can be used to exchange information and transmit data with other external devices, such as host computers, handheld operators, temperature and humidity sensors and other devices that support RS485 communication; the communication controller U10, PL3085A is an RS5 interface chip, which is responsible for converting the TTL signal level into the RS_485 signal level; the capacitor C78 connected to the RO pin of the RS_485 chip is used for decoupling the TX input end; the capacitor C76 connected to the VDD pin of the RS_485 chip is used for chip decoupling and stabilizing the VCC voltage supply; by watching the light-emitting diode D43 connected to the DI pin of the RS_485 chip, the data sent during the communication transmission process can be more intuitively detected; the diodes D30 and D32 are voltage regulator diodes used to protect the communication lines from damage by voltage spikes; a terminal resistor R129 is added to the output circuit. Due to the long communication distance, a certain signal attenuation will occur. The addition of a terminal resistor to this circuit prevents signal reflection and improves signal quality.

[0070] like Fig.14 It is a CNA communication circuit, through which CAN communication can be realized. It is mainly used in the charging pile liquid cooling system environment to exchange data with the BMS host computer, and supports connecting multiple CAN devices; Fig.14U6 is a CAN communication controller, whose CAN_H and CAN_L are bidirectional transmission differential signal ports, and are connected to a 120Ω terminal resistor to improve the quality of signal transmission; TXD, as the receiving end of CAN, receives the TTL / CMOS level transmission data signal and converts it into the CAN standard level for output; RXD, as the transmitting and receiving end of CAN, converts the CAN standard level into the TTL / CMOS level transmission data signal for output.

[0071] This embodiment is also provided with an upgrade module, such as Fig.16 As shown, the upgrade module is connected to the main controller, and the firmware upgrade of the program can be achieved through the SD card, which makes maintenance more convenient.

[0072] Furthermore, this embodiment is also provided with an electronic expansion valve control circuit, such as Fig.15 As shown, the circuit can be used to control the action of the electronic expansion valve in the liquid cooling system so that the liquid cooling system can reach a more suitable refrigeration condition. This is a prior art and will not be described in detail here.

[0073] This embodiment adopts an expandable single-board design, which is compact, easy to install, flexible to expand, highly integrated in functions, and convenient for program upgrade and maintenance. Specifically, the communication capability can be enhanced: RS485 communication and CAN communication are supported, so that the liquid cooling system can exchange data efficiently with a variety of different types of communication equipment, enhancing the interconnectivity and compatibility of the system. Second, it has multi-channel sensor data acquisition: by expanding the support for multi-channel sensor data acquisition, it can monitor the temperature, humidity, voltage and other parameters of the battery in real time, providing reliable data support for the precise control of the battery working state. Third, it simplifies program upgrades: it supports SD card upgrade programs, simplifies the program update process, and improves the convenience of maintenance; users can update the system software by simply plugging and unplugging the SD card without complicated operation steps. Fourth, it improves system reliability: by supporting multiple sensor data acquisition and multiple communication methods, the reliability of the system is improved; even if some sensors or communication equipment fail, the system can still obtain necessary data through other channels to ensure the normal operation of the liquid cooling system. Fifth, it enhances functional extensibility: the newly added functional modules enable the liquid cooling system controller to have stronger functional extensibility, which can be flexibly configured and adjusted according to actual needs to meet the needs of different application scenarios. Sixth, it can improve user experience: it supports functions such as fault recording and multiple communication interfaces, which improves the user experience. Users can understand the operating status of the system more intuitively, and can quickly locate the cause of the fault and take timely measures when a problem occurs. Seventh, it can reduce maintenance costs: by simplifying the program upgrade process and supporting multiple communication methods, the maintenance cost of the system is reduced; maintenance personnel can perform system maintenance more efficiently, reducing downtime and labor costs. Eighth, it improves system stability: it supports multiple sensor data acquisition and multiple communication interfaces, which improves the overall stability of the system, and the system can maintain a good operating state even in a complex working environment. In summary, the energy storage cold plate liquid cooling unit control system provided in this embodiment, by supporting multiple communication methods, multi-channel sensor data acquisition and simplified program upgrade functions, not only solves the problems existing in the prior art, but also significantly improves the system's reliability, scalability and user experience, reduces maintenance costs, and provides a strong guarantee for the stable operation of the energy storage system.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A control system for an energy storage cold plate liquid cooling unit, characterized in that: It includes a main controller, a power supply module, a communication module, a switch quantity acquisition module, a switch quantity output module, an analog quantity acquisition module and an analog quantity output module; The power supply module is used to supply power to the main controller; The switch quantity acquisition module includes a plurality of switch quantity detection circuits and a plurality of optical coupling acquisition circuits; the plurality of switch quantity detection circuits and the plurality of optical coupling acquisition circuits are used to acquire signals of an external liquid cooling unit, and the output ends of the switch quantity detection circuit and the optical coupling acquisition circuit are connected to the main controller; The switch quantity output module includes a plurality of relay output control circuits, the input end of the relay output control circuit is connected to the main controller, the main controller controls the output signal of the relay output control circuit according to the collected data of the switch quantity collection module, the output end of the relay output control circuit is connected to the external liquid cooling unit, and the start and stop of the external liquid cooling unit are controlled by the output signal; The analog quantity acquisition module is used to collect pressure and temperature data of the external liquid cooling unit. The output end of the analog quantity acquisition module is connected to the main controller and transmits the collected data to the main controller; The input end of the analog output module is connected to the main controller, and the main controller controls the output signal of the analog output module according to the acquisition of the analog acquisition module, and the output end of the analog output module is connected to the water pump and the fan of the external liquid cooling unit; The communication module is connected to the controller and is used to exchange data with external devices.

2. According to claim 1, a control system for an energy storage cold plate type liquid cooling unit is characterized in that: The switch quantity detection circuit includes a switch quantity detection interface, a resistor R45 and a resistor R38, the switch quantity detection interface is connected to the main controller through the resistor R38, and the power supply module is connected to the switch quantity detection interface through the resistor R45; The optocoupler acquisition circuit includes an optocoupler acquisition interface, an optocoupler U15, a resistor R15, a resistor R13, and a diode D3. The optocoupler acquisition interface is connected to a control end of the optocoupler U15 through the resistor R15, and the other control end of the optocoupler U15 is connected to the output end of the power supply module. The diode D3 is connected in parallel to the two control ends of the optocoupler U15. A switch end of the optocoupler U15 is connected to the main controller, and a switch end of the optocoupler U15 is connected to the output end of the power supply module through the resistor R13, and the other switch end of the optocoupler U15 is grounded.

3. According to claim 1, a control system for an energy storage cold plate type liquid cooling unit is characterized in that: The relay output control circuit includes a switching output interface, a relay K2, a resistor R4 and a diode D48. The switching output interface is connected to the main controller through the switch end of the relay K2, one control end of the relay K2 is connected to the output end of the power supply module, the other control end of the relay K2 is connected to the main controller, one control end of the relay K2 is connected to the anode of the diode D48 through the resistor R4, and the cathode of the diode D48 is connected to the other control end of the relay K2.

4. According to claim 1, a control system for an energy storage cold plate type liquid cooling unit is characterized in that: The analog input module includes a plurality of sensor acquisition circuits, and the plurality of sensor acquisition circuits are used to respectively acquire a plurality of pressure data and a plurality of temperature data; The sensor acquisition circuit includes a sensor acquisition interface, a diode V9, a capacitor C42, a resistor R70, a resistor NC5 and a resistor NC4. The output end of the sensor acquisition interface is connected to the main controller through the resistor R70, the two ends of the diode V9 are respectively connected to the ground end and the output end of the sensor acquisition interface, the resistor NC4 is connected in parallel with the diode V9, the output end of the sensor acquisition interface is connected to the power supply module through the resistor NC5, one end of the capacitor C42 is connected to the resistor R70, and the other end of the capacitor C42 is grounded.

5. According to claim 1, a control system for an energy storage cold plate type liquid cooling unit is characterized in that: The analog output module includes multiple analog output circuits, which include an analog output interface, a switch tube Q6, a switch tube Q5, a resistor R136, a resistor R137, a resistor R138 and a resistor R139. The main controller outputs a PWM control signal to the control end of the switch tube Q6 and a switch end of the switch tube Q5. The switch end of the switch tube Q6 is grounded, and the other switch end of the switch tube Q6 is connected to one end of the resistor R137 through the resistor R138. The other end of the resistor R137 is connected to the control end of the switch tube Q5. One end of the resistor R137 is connected to the analog output interface through the resistor R136. A switch end of the switch tube Q5 is grounded through the resistor R139, and the other switch end of the switch tube Q5 is connected to the analog output interface.

6. According to claim 1, a control system for an energy storage cold plate type liquid cooling unit is characterized in that: The power supply module includes a power supply circuit, which includes a power input module and a power conversion module. External power supply is connected to the power conversion module through the power input module. The power conversion module is used to convert the received power signal into a voltage signal for the operation of the back-end device.

7. The energy storage cold plate type liquid cooling unit control system according to claim 6, characterized in that: The power supply module also includes a power supply detection module, which is used to detect whether the three-phase voltage of the liquid cooling unit is working normally; The power supply detection module includes an optocoupler U17, an optocoupler U18, a diode D10, a diode D12, a resistor R60, a resistor R61 and two resistor units. The three-phase electricity of the liquid cooling unit is provided with three interfaces, the first interface is connected to the anode of the diode D10, the cathode of the diode D19 is connected to a control end of the optocoupler U18 through a resistor unit, the other control end of the optocoupler U18 and a control end of the optocoupler U17 are both connected to the second interface of the three-phase electricity, the third interface of the three-phase electricity is connected to the cathode of the diode D12, the anode of the diode D12 is connected to the other control end of the optocoupler U17 through another resistor unit, a switch end of the optocoupler U18 and a switch end of the optocoupler U17 are both grounded, the other switch end of the optocoupler U18 is connected to the main controller and the other switch end of the optocoupler U18 is connected to the power supply module through the resistor R60, the other switch end of the optocoupler U17 is connected to the main controller and the other switch end of the optocoupler U17 is connected to the power supply module through the resistor R61.

8. The energy storage cold plate liquid cooling unit control system according to claim 1, characterized in that: The communication module includes an RS485 communication circuit and a CAN communication circuit. The RS485 communication circuit is used for data transmission and communication with an external device, and the CAN communication circuit is used for connecting to an external CAN device and exchanging data with the external device.

9. The energy storage cold plate liquid cooling unit control system according to claim 8, characterized in that: The RS485 communication circuit includes a communication controller U10, a capacitor C78, ​​a capacitor C76, a diode D43, a diode D30, a diode D32, a switch tube Q3, a resistor R129, a resistor R108, a resistor R109 and a communication interface JP30; The first pin, the second pin, the third pin and the fourth pin of the communication controller U10 are all connected to the main controller, the first pin of the communication controller U10 is grounded through the capacitor C78, ​​the fourth pin of the communication controller U10 is connected to the control end of the switch tube Q3, one switch end of the switch tube Q3 is connected to the power supply module, the other switch end of the switch tube Q3 is connected to the anode of the diode D43, and the cathode of the diode D43 is grounded through the resistor R124; The eighth pin of the communication controller U10 is grounded via a capacitor C76, the seventh pin of the communication controller U10 is connected to the communication interface via a resistor R108, and the sixth pin of the communication controller U10 is connected to the communication interface via a resistor R109; One end of the diode D30 is connected to the resistor R108 , and the other end of the diode D30 is grounded; one end of the diode D32 is connected to the resistor R109 , and the other end of the diode D32 is grounded.

10. The energy storage cold plate liquid cooling unit control system according to claim 1, characterized in that: It also includes an upgrade module, which is connected to the main controller and is used for performing firmware upgrade.

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