Battery pack cold plate inlet temperature control method and system and electronic equipment

Abstract

The invention discloses a battery pack cold plate inlet temperature control method and system and electronic equipment. The method comprises the steps of obtaining a current inlet temperature of a battery pack cold plate; according to the current inlet temperature and the preset target inlet temperature, the target rotating speed of an air-cooled condenser fan and the target output power of an electric heater in a water tank are calculated based on a PID algorithm; and according to the target rotating speed and the target output power, the actual rotating speed of an air-cooled condenser fan and the actual output power of an electric heater in a water tank are controlled, so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature. According to the technical scheme provided by the embodiment of the invention, an original air-cooled condenser is replaced by the existing water-cooled condenser, so that the problems of great influence of external environment temperature, slow response time and low control precision in the prior art are solved, and the air-cooled condenser has the beneficial effects of no influence of external environment, short response time and high control precision.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration system control, and particularly to a control method, system and electronic device for the inlet temperature of a battery pack cold plate. Background Art

[0002] Currently, the experimental equipment for the performance experiment verification of new energy battery packs and cold plates mainly utilizes the vehicle thermal management control system. Since most vehicle thermal management systems are matched with several fixed battery packs for each vehicle model, the hardware and control algorithms are configured according to the parameters of the current several battery packs. However, the types of battery packs tested in the laboratory are numerous, and most of them are newly developed products. Therefore, the current vehicle thermal management system has poor compatibility and cannot meet the experimental equipment requirements of the laboratory.

[0003] The new energy industry laboratory requires experimental equipment with stable and reliable performance, strong compatibility, convenient operation, and data recording and storage. And the high-precision inlet temperature control method is one of the important test indicators of this experimental equipment. The existing methods for the inlet temperature of the performance experiment verification of new energy battery packs and cold plates have problems such as being greatly affected by the external environmental temperature, slow response time, and low control accuracy. Summary of the Invention

[0004] The present invention provides a control method, system and electronic device for the inlet temperature of a battery pack cold plate to solve the problems of the existing methods for the inlet temperature of the performance experiment verification of new energy battery packs and cold plates, such as being greatly affected by the external environmental temperature, slow response time, and low control accuracy.

[0005] According to an aspect of the present invention, there is provided a control method for the inlet temperature of a battery pack cold plate, which is used for a control system of the inlet temperature of a battery pack cold plate. The control system includes a compressor, a water-cooled condenser, an air-cooled condenser and a water tank, and an electric heater is arranged in the water tank. The method includes:

[0006] Obtain the current inlet temperature of the battery pack cold plate;

[0007] Based on the PID algorithm, respectively calculate the target rotation speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank according to the current inlet temperature and the preset target inlet temperature;

[0008] According to the target rotation speed and the target output power, respectively control the actual rotation speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank, so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature.

[0009] Optionally, the step of calculating the target rotation speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank based on the PID algorithm according to the current inlet temperature and the preset target inlet temperature includes:

[0010] When the current inlet temperature is greater than the preset target inlet temperature, calculate the first temperature deviation.

[0011] Based on the first temperature deviation and the PID algorithm, calculate the target speed of the air-cooled condenser fan.

[0012] Optionally, according to the current inlet temperature and the preset target inlet temperature, based on the PID algorithm, calculating the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively further includes:

[0013] When the current inlet temperature is less than the preset target inlet temperature, calculate the second temperature deviation.

[0014] Based on the second temperature deviation and the PID algorithm, calculate the target output power of the electric heater in the water tank.

[0015] Optionally, according to the target speed and the target output power, controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively to make the current inlet temperature of the battery pack cold plate reach the preset target inlet temperature includes:

[0016] According to the target speed of the air-cooled condenser fan, control the actual speed of the air-cooled condenser fan to make the current inlet temperature of the battery pack cold plate reach the preset target inlet temperature.

[0017] Optionally, according to the target speed and the target output power, controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively to make the current inlet temperature of the battery pack cold plate reach the preset target inlet temperature includes:

[0018] According to the target output power of the electric heater in the water tank, control the actual output power of the electric heater in the water tank to make the current inlet temperature of the battery pack cold plate reach the preset target inlet temperature.

[0019] Optionally, before controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively according to the target speed and the target output power to make the current inlet temperature of the battery pack cold plate reach the preset target inlet temperature, it further includes:

[0020] Obtain the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank.

[0021] Optionally, before obtaining the current inlet temperature of the battery pack cold plate, it further includes:

[0022] Conduct self-inspection on components and determine whether the self-inspection of components is qualified.

[0023] If the component self-check is qualified, the control component operates based on a preset initial opening for a preset time;

[0024] If the component self-check is unqualified, an alarm prompt is given.

[0025] According to another aspect of the present invention, a control system for the inlet temperature of a battery pack cold plate is provided, including a compressor, a water-cooled condenser, an air-cooled condenser, and a water tank, and an electric heater is arranged in the water tank;

[0026] The exhaust port of the compressor is connected to the refrigerant inlet of the water-cooled condenser, and the refrigerant outlet of the water-cooled condenser is connected to the battery pack inlet;

[0027] The battery pack outlet is connected to the suction port of the compressor;

[0028] The water tank inlet of the water-cooled condenser is connected to the water tank, and the water tank outlet of the water-cooled condenser is connected to one end of the air-cooled condenser;

[0029] The other end of the air-cooled condenser is connected to the water tank.

[0030] Optionally, the control system for the inlet temperature of the battery pack cold plate further includes an expansion tank, a liquid filling pump, and a variable frequency water pump;

[0031] The variable frequency water pump is connected between the water tank and the water tank inlet of the water-cooled condenser;

[0032] The expansion tank is connected to the upper part of the water tank;

[0033] The liquid filling pump is arranged on the upper part of the expansion tank.

[0034] According to another aspect of the present invention, an electronic device is provided, and the electronic device includes:

[0035] At least one processor; and

[0036] A memory communicatively connected to the at least one processor; wherein,

[0037] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the control method for the inlet temperature of the battery pack cold plate according to any embodiment of the present invention.

[0038] An embodiment of the present invention provides a method, a system, and an electronic device for controlling the inlet temperature of a battery pack cold plate. The method includes: obtaining the current inlet temperature of the battery pack cold plate; based on the current inlet temperature and a preset target inlet temperature, and using a PID algorithm, calculating the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively; controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively according to the target speed and the target output power, so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature. The technical solution provided by the embodiment of the present invention replaces the original air-cooled condenser with the existing water-cooled condenser, and based on the current inlet temperature and the preset target inlet temperature, uses the PID algorithm to calculate the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively, so that the temperature of the aqueous solution in the water tank can meet the temperature required for the current inlet temperature of the battery pack cold plate to reach the preset target inlet temperature, and exchanges heat between the aqueous solution that meets the temperature required for the current inlet temperature of the battery pack cold plate to reach the preset target inlet temperature and the refrigerant in the water-cooled condenser, so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature. The technical solution provided by the embodiment of the present invention has the beneficial effects of being not affected by the external environment, having a fast response time, and high control accuracy.

[0039] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a flowchart of a method for controlling the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention;

[0042] Figure 2 It is a schematic structural diagram of a system for controlling the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention;

[0043] Figure 3 It is a schematic structural diagram of an electronic device for a method for controlling the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] To enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] Figure 1 It is a flowchart of a method for controlling the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention. This embodiment is applicable to controlling the inlet temperature of the battery pack cold plate. This method can be executed by a control system for the inlet temperature of the battery pack cold plate. The control system for the inlet temperature of the battery pack cold plate can be implemented in the form of hardware and / or software, and can be configured in any electronic device with communication functions. Figure 2 It is a schematic structural diagram of a control system for the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention. Refer to Figure 2 , the system includes a compressor 1, a water-cooled condenser 2, an air-cooled condenser 3, and a water tank 4. An electric heater 5 is arranged in the water tank 4. The exhaust port of the compressor is connected to the refrigerant inlet H4 of the water-cooled condenser, and the refrigerant outlet H3 of the water-cooled condenser is connected to the direct heat-battery pack inlet; the direct heat-battery pack outlet is connected to the suction port of the compressor; the water tank inlet A1-1 of the water-cooled condenser is connected to the water tank 4, and the water tank outlet A1-2 of the water-cooled condenser is connected to one end of the air-cooled condenser 3; the other end of the air-cooled condenser 3 is connected to the water tank 4. Refer to Figure 1 , the method includes:

[0047] S110. Obtain the current inlet temperature of the battery pack cold plate.

[0048] Specifically, refer to Figure 2 , at Figure 2In it, the inlet of the direct-heat battery pack is connected to the inlet of the cold plate of the device under test's battery pack, and the outlet of the direct-heat battery pack is connected to the outlet of the cold plate of the device under test's battery pack. Therefore, the current inlet temperature of the cold plate of the battery pack described in the embodiment of the present invention is the current temperature at the connection between the inlet of the direct-heat battery pack and the inlet of the cold plate of the device under test's battery pack, which can be collected by a temperature sensor.

[0049] S120. According to the current inlet temperature and the preset target inlet temperature, based on the PID algorithm, calculate the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively.

[0050] Among them, the preset target inlet temperature can be preset according to the customer's test requirements.

[0051] Specifically, calculate the target speed of the air-cooled condenser fan: The function of the air-cooled condenser fan is to enhance the heat dissipation capacity of the condenser by forcing air flow, and then adjust the temperature of the aqueous solution in the water tank. First, calculate the deviation between the current inlet temperature and the preset target inlet temperature. Then input the deviation into the Proportional-Integral-Derivative (PID) algorithm. The PID algorithm will calculate a control quantity according to the magnitude of the deviation, the accumulation of the deviation, that is, the integral term, and the change speed of the deviation, that is, the differential term, according to a certain calculation formula. Finally, convert the control quantity into the target speed of the air-cooled condenser fan. Calculate the target output power of the electric heater in the water tank: The electric heater in the water tank is used to heat the aqueous solution in the water tank when the system temperature is too low. The calculation process of calculating the target output power of the electric heater in the water tank is the same as the above calculation process of the target speed of the air-cooled condenser fan, and will not be elaborated here.

[0052] By calculating the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively, the system can adjust the operating states of these two devices in real time according to the actual temperature situation, so that the inlet temperature of the fluid gradually approaches the preset target inlet temperature, ensuring the stable operation and performance optimization of the system. For example, when the current inlet temperature is higher than the preset target inlet temperature, the PID algorithm will calculate a higher target speed to make the fan run faster, enhance the heat dissipation effect, and adjust the temperature of the aqueous solution in the water tank; when the current inlet temperature is lower than the preset target inlet temperature, the PID algorithm will calculate a higher target output power to make the electric heater increase the heating intensity, so as to heat the aqueous solution in the water tank.

[0053] S130. According to the target speed and the target output power, control the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively, so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature.

[0054] Specifically, the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank have been calculated in step S120. These two target values are obtained through algorithm analysis based on the difference between the current inlet temperature of the battery pack cold plate and the preset target inlet temperature, and they represent the operating states that the fan and the electric heater need to reach in order to make the inlet temperature reach the preset value. For the air-cooled condenser fan, devices such as a motor driver are used to change parameters such as the power supply frequency or voltage of the fan motor, so that the actual speed of the fan reaches the target speed. For the electric heater in the water tank, its input current or voltage is adjusted to make its actual output power reach the target output power. By adjusting the speed of the air-cooled condenser fan, the air flow can be changed, thereby cooling the aqueous solution in the water tank, and then affecting the temperature of the coolant flowing through the battery pack cold plate; by adjusting the output power of the electric heater in the water tank, the temperature of the aqueous solution in the water tank can be changed, and then affecting the temperature of the coolant flowing through the battery pack cold plate. By combining these two control means, the current inlet temperature of the battery pack cold plate is finally continuously approximated and reaches the preset target inlet temperature, ensuring that the battery pack works in a suitable temperature environment to improve the performance, life and safety of the battery.

[0055] The working process of a control system for the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention is as follows: The refrigerant flows out from the exhaust port of the compressor, flows to the refrigerant inlet of the water-cooled condenser, and enters the water-cooled condenser. There is cooling water continuously circulating in the water-cooled condenser. Through heat exchange, the heat of the refrigerant gas is transferred to the cooling water, reducing the temperature of the refrigerant gas. Then it flows through the refrigerant outlet of the water-cooled condenser to the measured battery pack cold plate connected to the direct heat-battery pack inlet, and then from the outlet of the measured battery pack cold plate, flows to the direct heat-battery pack outlet, and flows into the compressor through the suction port of the compressor to form a cycle. When the current inlet temperature is higher than the preset target inlet temperature, the PID algorithm will calculate a higher target speed to make the air-cooled condenser fan operate at an accelerated speed to cool the aqueous solution in the water tank, and at this time, the electric heater in the water tank stops working; when the current inlet temperature is lower than the preset target inlet temperature, the PID algorithm will calculate a higher target output power to make the electric heater increase the heating intensity, thereby heating the aqueous solution in the water tank. Finally, the aqueous solution in the water tank enters the water-cooled condenser through the water tank inlet for heat exchange with the refrigerant. After heat exchange, the aqueous solution flows through the water tank outlet to the air-cooled condenser and enters the water tank. Note that the ratio of the aqueous solution in the water tank is 60% ethylene glycol solution and 40% water.

[0056] The technical solution provided by the embodiment of the present invention replaces the original air-cooled condenser with the existing water-cooled condenser. According to the current inlet temperature and the preset target inlet temperature, based on the PID algorithm, the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank are calculated respectively, so that the temperature of the aqueous solution in the water tank can meet the temperature required for the current inlet temperature of the battery pack cold plate to reach the preset target inlet temperature. The aqueous solution that meets the temperature required for the current inlet temperature of the battery pack cold plate to reach the preset target inlet temperature exchanges heat with the refrigerant in the water-cooled condenser, so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature. The technical solution provided by the embodiment of the present invention has the beneficial effects of being not affected by the external environment, having a fast response time, and high control accuracy.

[0057] In some other embodiments, optionally, step S120 specifically includes:

[0058] When the current inlet temperature is greater than the preset target inlet temperature, calculate the first temperature deviation; according to the first temperature deviation, based on the PID algorithm, calculate the target speed of the air-cooled condenser fan.

[0059] Optionally, step S120 further includes:

[0060] When the current inlet temperature is less than the preset target inlet temperature, calculate the second temperature deviation; according to the second temperature deviation, based on the PID algorithm, calculate the target output power of the electric heater in the water tank.

[0061] Specifically, when the current inlet temperature is greater than the preset target inlet temperature, at this time, it is not necessary to use the electric heater in the water tank to heat the solution in the water tank, and it is necessary to cool and dissipate the heat of the aqueous solution in the water tank through the air-cooled condenser. Therefore, when the current inlet temperature is greater than the preset target inlet temperature, calculate the first temperature deviation; according to the first temperature deviation, based on the PID algorithm, calculate the target speed of the air-cooled condenser fan. When the current inlet temperature is less than the preset target inlet temperature, at this time, it is necessary to heat the aqueous solution in the water tank through the electric heater in the water tank. Therefore, when the current inlet temperature is less than the preset target inlet temperature, calculate the second temperature deviation; according to the second temperature deviation, based on the PID algorithm, calculate the target output power of the electric heater in the water tank.

[0062] Optionally, step S130 specifically includes:

[0063] According to the target speed of the air-cooled condenser fan, control the actual speed of the air-cooled condenser fan so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature.

[0064] Specifically, after obtaining the target rotational speed, the system will adopt corresponding control means to adjust the actual rotational speed of the air-cooled condenser fan. For example, it is achieved through a controller. The controller can adjust the actual rotational speed of the fan by changing parameters such as the current, voltage, or frequency supplied to the fan motor according to the received target rotational speed signal.

[0065] Control the actual output power of the electric heater in the water tank according to the target output power of the electric heater in the water tank, so that the current inlet temperature of the battery pack cold plate reaches the preset target inlet temperature.

[0066] Specifically, after determining the target output power, the system can adjust the actual output power of the electric heater in the water tank by the controller changing the input voltage or current of the electric heater. For example, if the target output power is higher than the current actual output power, the controller will increase the input voltage or current of the electric heater to generate more heat, thereby increasing the actual output power; conversely, if the target output power is lower than the current actual output power, the controller will reduce the input voltage or current to reduce heat generation and lower the actual output power.

[0067] Optionally, before step S130, it further includes:

[0068] Obtain the actual rotational speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank.

[0069] Specifically, the actual rotational speed of the air-cooled condenser fan can be collected by a speed sensor, or by the speed feedback function of the motor driver. When the motor driver controls the operation of the fan motor, it will monitor the electrical parameters of the motor in real time, such as current, voltage, and frequency, and calculate the rotational speed of the motor based on these parameters. The actual output power of the electric heater can be measured by a power sensor; it can also be measured by a voltage sensor and a current sensor to measure the actual voltage across the electric heater and the actual current passing through it respectively, and the controller can calculate the actual output power of the electric heater by multiplying the measured voltage and current values.

[0070] Optionally, before step S110, it further includes:

[0071] Self-check the components and determine whether the self-check of the components is qualified; if the self-check of the components is qualified, control the components to operate at the preset initial opening for a preset time; if the self-check of the components is unqualified, give an alarm prompt.

[0072] Specifically, component self-check refers to the process in which the control system conducts self-checks on relevant components, such as the air-cooled condenser fan, the electric heater in the water tank, etc. The self-check content can include checking whether the electrical connections of the components are normal, whether the sensors can accurately feedback information, whether the mechanical components can operate normally, etc. Through a series of detection procedures and algorithms, it is determined whether the components are in a normal working state. The data and information obtained during the component self-check process are compared with preset standards or thresholds. If all the indicators of the component are within the normal range, for example, the resistance value of the fan motor is within the specified range, and the heating element of the heater has no short circuit or open circuit, etc., then it is determined that the component self-check is qualified; conversely, if it is found that any one indicator exceeds the normal range, it is determined that the component self-check is unqualified. When the component is determined to be qualified through self-check, the system will control the component to operate at the preset initial opening. For the air-cooled condenser fan, the initial opening may refer to the initial rotational speed setting value of the fan; for the electric heater in the water tank, the initial opening may refer to the initial power setting value of the electric heater. The component will operate at this initial opening for a preset period of time, which is determined according to the system design and actual requirements, such as 5 minutes or 10 minutes, etc. The purpose of doing this is to let the component operate in a relatively stable initial state for a period of time before officially entering the normal working state, to further detect the stability and performance of the component during actual operation, and at the same time to provide an initial reference state for the subsequent control and adjustment of the system. If problems are found during the component self-check, that is, it is determined to be unqualified, the system will immediately trigger the alarm mechanism. The alarm prompt can be achieved in various ways, such as emitting a sound alarm, displaying an error code or prompt message on the display screen, sending a notification to the mobile phone or terminal of relevant personnel, etc. This can promptly inform the operator or maintenance personnel that the component has failed, so that they can take corresponding measures for repair or handling as soon as possible, and avoid the system continuing to operate when the component is faulty, thereby preventing more serious problems or safety accidents that may occur.

[0073] Continue to refer to Figure 2 , Figure 2 FIG. is a schematic structural diagram of a control system for the inlet temperature of a battery pack cold plate, including a compressor 1, a water-cooled condenser 2, an air-cooled condenser 3, and a water tank 4. An electric heater 5 is arranged in the water tank 4. The exhaust port of the compressor is connected to the refrigerant inlet H4 of the water-cooled condenser, and the refrigerant outlet H3 of the water-cooled condenser is connected to the direct heat-battery pack inlet; the direct heat-battery pack outlet is connected to the suction port of the compressor; the water tank inlet A1-1 of the water-cooled condenser is connected to the water tank 4, and the water tank outlet A1-2 of the water-cooled condenser is connected to one end of the air-cooled condenser 3; the other end of the air-cooled condenser 3 is connected to the water tank 4.

[0074] Continue to refer to Figure 2, Optionally, the control system for the inlet temperature of the battery pack cold plate further includes an expansion tank 6, a liquid replenishing pump 7, and a variable-frequency water pump 8; the variable-frequency water pump 8 is connected between the water tank 4 and the water tank inlet A1-1 of the water-cooled condenser; the expansion tank 6 is connected to the upper part of the water tank 4; the liquid replenishing pump 7 is arranged on the upper part of the expansion tank 6.

[0075] The expansion tank is used such that when the pressure in the water tank increases, the excess liquid can flow into the expansion tank; when the pressure in the water tank decreases, the liquid in the expansion tank can be replenished into the water tank to keep the pressure in the water tank in a stable state.

[0076] The liquid replenishing pump is used to timely replenish the expansion tank when the liquid in the expansion tank is insufficient.

[0077] The variable-frequency water pump is used to adjust the rotational speed of the variable-frequency water pump by changing the power supply frequency of the motor according to actual requirements, so as to precisely control the flow rate of the aqueous solution in the water tank.

[0078] The control system for the inlet temperature of the battery pack cold plate provided by the embodiment of the present invention can execute the control method for the inlet temperature of the battery pack cold plate provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0079] Figure 3 It is a schematic structural diagram of an electronic device for a control method of the inlet temperature of a battery pack cold plate provided by an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0080] As Figure 3As shown, the electronic device 10 includes at least one processor 11 and a memory communicatively connected to the at least one processor 11, such as read-only memory (ROM) 12, random access memory (RAM) 13, etc. The memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0081] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0082] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for controlling the inlet temperature of a battery pack cold plate.

[0083] In some embodiments, the method for controlling the inlet temperature of a battery pack cold plate can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for controlling the inlet temperature of a battery pack cold plate described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the method for controlling the inlet temperature of a battery pack cold plate by any other appropriate means (e.g., by means of firmware).

[0084] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems-on-chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which may be a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0085] The computer programs for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer programs can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0086] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0087] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: 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 electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0088] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0089] A computing system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The relationship between the client and the server is created by computer programs running on respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0090] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0091] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for controlling the inlet temperature of a cold plate of a battery pack, characterized in that A control system for the inlet temperature of the cold plate of a battery pack. The control system includes a compressor, a water-cooled condenser, an air-cooled condenser, and a water tank, and an electric heater is arranged in the water tank. The method includes: Obtain the current inlet temperature of the cold plate of the battery pack; Based on the PID algorithm, calculate the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively according to the current inlet temperature and the preset target inlet temperature; Control the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively according to the target speed and the target output power, so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature.

2. The method according to claim 1, wherein The calculating the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively based on the PID algorithm according to the current inlet temperature and the preset target inlet temperature includes: When the current inlet temperature is greater than the preset target inlet temperature, calculate the first temperature deviation; Based on the PID algorithm, calculate the target speed of the air-cooled condenser fan according to the first temperature deviation.

3. The method according to claim 1, characterized in that, The calculating the target speed of the air-cooled condenser fan and the target output power of the electric heater in the water tank respectively based on the PID algorithm according to the current inlet temperature and the preset target inlet temperature further includes: When the current inlet temperature is less than the preset target inlet temperature, calculate the second temperature deviation; Based on the PID algorithm, calculate the target output power of the electric heater in the water tank according to the second temperature deviation.

4. The method according to claim 2, wherein The controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively according to the target speed and the target output power so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature includes: Control the actual speed of the air-cooled condenser fan according to the target speed of the air-cooled condenser fan, so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature.

5. The method according to claim 3, characterized in that The controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively according to the target speed and the target output power so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature includes: Control the actual output power of the electric heater in the water tank according to the target output power of the electric heater in the water tank, so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature.

6. The method according to claim 1, wherein Before the controlling the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank respectively according to the target speed and the target output power so that the current inlet temperature of the cold plate of the battery pack reaches the preset target inlet temperature, it further includes: Obtain the actual speed of the air-cooled condenser fan and the actual output power of the electric heater in the water tank.

7. The method according to claim 1, wherein Before the obtaining the current inlet temperature of the cold plate of the battery pack, it further includes: Self-check the components and judge whether the self-check of the components is qualified; If the self-check of the components is qualified, control the components to operate at the preset initial opening for a preset time; If the self-check of the components is unqualified, give an alarm prompt.

8. A control system for the inlet temperature of a battery pack cold plate, characterized in that, It includes a compressor, a water-cooled condenser, an air-cooled condenser, and a water tank, and an electric heater is arranged in the water tank; The exhaust port of the compressor is connected to the refrigerant inlet of the water-cooled condenser, and the refrigerant outlet of the water-cooled condenser is connected to the battery pack inlet; The battery pack outlet is connected to the suction port of the compressor; The water tank inlet of the water-cooled condenser is connected to the water tank, and the water tank outlet of the water-cooled condenser is connected to one end of the air-cooled condenser; The other end of the air-cooled condenser is connected to the water tank.

9. The system according to claim 8, wherein It further includes an expansion tank, a liquid filling pump and a variable frequency water pump; The variable frequency water pump is connected between the water tank and the water tank inlet of the water-cooled condenser; The expansion tank is connected to the upper part of the water tank; The liquid filling pump is arranged at the upper part of the expansion tank.

10. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the control method of the battery pack cold plate inlet temperature according to any one of claims 1-7.

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