An energy storage thermal management system and a heat control method for an energy storage thermal management system

Abstract

The present application relates to an energy storage thermal management system and a heat control method for an energy storage thermal management system, which belongs to the technical field of energy storage thermal management. The system includes an energy storage circuit and a refrigeration module, a heating module, a driving module, and a heat exchange module arranged on the energy storage circuit; the energy storage circuit is composed of pipes connected end to end, and a refrigerant is configured in the pipes; the refrigeration module is used for dissipating heat from the refrigerant; the heating module is used for heating the refrigerant; the driving module is used for driving the refrigerant to circulate in the pipes; the heat exchange module is in contact with the target device, and the heat exchange module is used for conducting the temperature of the higher-temperature one of the refrigerant and the target device to the other. The target device is an electronic device whose temperature needs to be maintained within the working temperature range. The present application can achieve the integration of heat dissipation and heating of the refrigerant, and has few heat exchange times during the heat dissipation and heating processes, and has the effect of improving the heat management ability of the energy storage thermal management system.

Description

Technical Field

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

[0002] When the energy storage thermal management system is applied to the battery thermal insulation field, in order to ensure that the battery is in a suitable working temperature range, it needs to be cooled at high temperatures and heated at low temperatures, so that the battery can operate in long cycles.

[0003] However, in the current energy storage thermal management system, a liquid cooling system is commonly used to dissipate heat from the battery. This liquid cooling system mainly uses a compressor to drive the refrigerant and the coolant to achieve forced refrigeration. When the compressor works, it drives the refrigerant to flow in the circuit. The refrigerant first cools the coolant, and then the coolant takes away the heat of the battery through the cold plate. There are multiple heat exchanges in the middle, and the heat difference decreases, resulting in low heat dissipation efficiency. In addition, due to multiple heat exchanges in this liquid cooling system, the heat provided during heating cannot meet the heat demand of the battery, and even some liquid cooling systems do not have a heating function, so an independent heating system needs to be configured to heat the battery.

[0004] It can be seen that the current energy storage thermal management system has the problems of low heat management ability and difficulty in meeting the actual energy storage requirements. Summary of the Invention

[0005] In order to solve the problem of low heat management ability of the energy storage thermal management system, the present application provides an energy storage thermal management system and a heat control method for an energy storage thermal management system.

[0006] In the first aspect of the present application, an energy storage thermal management system is provided. The system includes an energy storage circuit and a refrigeration module, a heating module, a driving module, and a heat exchange module provided on the energy storage circuit;

[0007] The energy storage circuit is composed of pipes connected end to end, and a refrigerant is configured in the pipes;

[0008] The refrigeration module is used to dissipate heat from the refrigerant;

[0009] The heating module is used to heat the refrigerant;

[0010] The driving module is used to drive the refrigerant to circulate in the pipes;

[0011] The heat exchange module is in contact with the target device, and the heat exchange module is used to conduct the temperature of the higher-temperature one of the refrigerant and the target device to the other. The target device is an electronic device whose temperature needs to be maintained within the operating temperature range, and the operating temperature range refers to the temperature fluctuation range when the target device operates normally.

[0012] By adopting the above technical solution, when it is necessary to cool the target device, first, the refrigeration module dissipates heat from the refrigerant, and then the driving module drives the cooled refrigerant to circulate in the pipeline. The refrigerant flowing through the heat exchange module absorbs the heat of the target device to achieve the purpose of reducing the temperature of the target device. When it is necessary to warm the target device, first, the heating module heats the refrigerant, and then the driving module drives the heated refrigerant to circulate in the pipeline. The refrigerant flowing through the heat exchange module releases heat to the target device to increase the temperature of the target device. It can be seen that the energy storage thermal management system of the present application can dynamically adjust the heat of the refrigerant, that is, it can improve its internal heat management ability, thereby providing technical support for keeping the target device within the operating temperature range.

[0013] In a possible implementation manner: the refrigeration module includes a condenser and a condensation fan, and the air inlet of the condenser is communicated with the air outlet of the condensation fan.

[0014] In a possible implementation manner: the heating module includes a liquid receiver and an electric heating tape arranged at the bottom of the liquid receiver.

[0015] In a possible implementation manner: the driving module includes a first driving sub-module and a second driving sub-module. The first driving sub-module is arranged at the input end of the refrigeration module, and the second driving sub-module is arranged at the output end of the heating module.

[0016] In a possible implementation manner: it further includes a main controller;

[0017] The first driving sub-module includes a compressor and a first sensor group. The first sensor group is communicatively connected to the main controller, and the main controller is connected to the control end of the compressor. The first sensor group is composed of various types of sensors.

[0018] In a possible implementation manner: it further includes a processing module;

[0019] The processing module includes a gas-liquid separator and a second sensor group. The second sensor group is communicatively connected to the main controller, and the main controller is connected to the control end of the gas-liquid separator. The second sensor group is composed of various types of sensors.

[0020] In a possible implementation: the second driving sub-module includes a metering pump, a solenoid valve, and an electronic expansion valve;

[0021] The metering pump and the solenoid valve are connected in series to form a pumping channel;

[0022] The electronic expansion valve is arranged in parallel with the pumping channel.

[0023] In a possible implementation: the heat exchange module is composed of multiple cold plates arranged in parallel, each cold plate is in contact with a target device, and a liquid solenoid valve is arranged at the input end of each cold plate.

[0024] In a second aspect of the present application, a heat control method for an energy storage thermal management system is provided. The method includes:

[0025] Obtain the temperature of the target environment, the temperature of the refrigerant, and the temperature of the target device, where the target environment is the environment where the target device is located;

[0026] When the temperature of the target environment is higher than the first temperature threshold, generate a first control strategy for performing primary heat dissipation on the refrigerant;

[0027] When the difference between the temperature of the refrigerant and the temperature of the target environment is higher than the difference threshold, generate a second control strategy for performing secondary heat dissipation on the refrigerant, and the heat of the secondary heat dissipation is less than the heat of the primary heat dissipation;

[0028] When the temperature of the target device is lower than the second temperature threshold, generate a third control strategy for heating the refrigerant, where the second temperature threshold refers to the minimum value of the operating temperature range of the target device.

[0029] In a possible implementation: the first control strategy is: start the compressor and the condenser fan, and close the metering pump and the solenoid valve; the second control strategy is: turn off the compressor, and start the condenser fan, the metering pump, and the solenoid valve; the third control strategy is: turn off the compressor and the condenser fan, and start the electric heating belt, the metering pump, and the solenoid valve.

[0030] By adopting the above technical solution, when the temperature of the target environment is too high, in order to prevent the temperature of the target environment from exacerbating the temperature rise of the target device, the compressor is started. With the cooperation of the compressor and the condenser fan, the refrigerant entering the heat exchange cycle takes away the heat of the target device, ensuring that the target device is within the working temperature range; when the temperature of the refrigerant is higher than the temperature of the target environment by a certain value, not only does the refrigerant dissipate heat from the target device, but the target environment also absorbs part of the heat of the target device. Therefore, at this time, only the condenser fan is used to dissipate heat from the refrigerant, and the refrigerant entering the heat exchange cycle can take away the excess heat of the target device, ensuring that the target device is within the working temperature range; when the temperature of the target device is too low, the refrigerant is heated by the electric heating tape, and the refrigerant entering the heat exchange cycle can provide the required heat for the target device, ensuring that the temperature of the target device enters the working temperature range, thereby ensuring the safe and stable operation of the target device. It can be seen that the energy storage thermal management system of the present application can adopt different control strategies to dynamically adjust the heat of the refrigerant in the energy storage thermal management system, so as to ensure that the heat of the refrigerant can support the target device to be within the working temperature range.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] When it is necessary to cool the target device, first, the refrigerant is dissipated by the refrigeration module, and then the driven module drives the dissipated refrigerant to circulate in the pipeline. The refrigerant flowing through the heat exchange module absorbs the heat of the target device to achieve the purpose of reducing the temperature of the target device. When it is necessary to warm the target device, first, the refrigerant is heated by the heating module, and then the driven module drives the heated refrigerant to circulate in the pipeline. The refrigerant flowing through the heat exchange module releases heat to the target device to increase the temperature of the target device. It can be seen that the energy storage thermal management system of the present application can realize the integration of heat dissipation and heating of the refrigerant, and the number of heat exchange times is small during the heat dissipation and heating processes, with only the refrigerant. Therefore, it can improve the heat management ability of the energy storage thermal management system, and further provide technical support for ensuring that the target device is within the working temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of an exemplary operating environment of an embodiment of the present application.

[0034] Figure 2 is a flowchart of a method for controlling the heat of an energy storage thermal management system according to an embodiment of the present application.

[0035] Description of reference numerals: 1. Target device; 2. Energy storage circuit; 3. Refrigeration module; 31. Condenser; 32. Condensing fan; 4. Heating module; 41. Liquid receiver; 42. Electric heating tape; 5. Driving module; 51. First driving sub-module; 511. Compressor; 512. First sensor group; 52. Second driving sub-module; 521. Metering pump; 522. Solenoid valve; 523. Electronic expansion valve; 6. Heat exchange module; 61. Cold plate; 62. Liquid solenoid valve; 7. Processing module; 71. Gas-liquid separator; 72. Second sensor group; 8. Dry filter; 9. Check valve. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] Figure 1 The figure shows a schematic diagram of an exemplary operating environment in which the embodiments of the present application can be implemented. The operating environment includes a target device 1 and an energy storage thermal management system. The target device 1 is an electronic device whose temperature needs to be maintained within an operating temperature range. The operating temperature range refers to the temperature fluctuation range when the target device 1 operates normally. The energy storage thermal management system is used to dissipate heat or heat the target device 1 so that the temperature of the target device 1 is always within the operating temperature range.

[0038] The target device 1 can be a battery or other electronic devices whose temperature needs to be maintained within an operating temperature range, such as electronic devices like vehicle engines or air conditioners. Hereinafter, the target device 1 being a battery will be taken as an example for illustration.

[0039] The energy storage thermal management system includes an energy storage loop 2, as well as a refrigeration module 3, a heating module 4, a driving module 5, a heat exchange module 6, and a processing module 7 provided on the energy storage loop 2. Among them, the energy storage loop 2 is composed of pipes connected end to end. The pipes are corrosion-resistant and high-temperature-resistant pipes, and a refrigerant is configured inside the pipes. The refrigerant can be any one of R22, R134a, R407C, R410A, R513A, R454B, and R454C. The refrigeration module 3 is used to dissipate heat from the refrigerant, the heating module 4 is used to heat the refrigerant, and the driving module 5 is used to drive the refrigerant after heat dissipation or heating to circulate in the circulation channel formed by the energy storage loop 2. When the refrigerant passes through the heat exchange module 6, the heat exchange module 6 conducts the temperature of the higher-temperature party between the refrigerant and the battery to the other party to achieve heat exchange. Finally, the refrigerant after heat exchange returns to the processing module 7, and after being processed by the processing module 7, it re-enters a new heat exchange cycle.

[0040] When the refrigerant circulates, it first passes through the refrigeration module 3. The refrigeration module 3 includes a condenser 31 and a condensing fan 32. The condensing fan 32 is installed outside the condenser 31. Specifically, the air inlet of the condenser 31 is communicated with the air outlet of the condensing fan 32. The condensing fan 32 provides forced-convection cooling air for the condenser 31, and the condenser 31 condenses the high-temperature refrigerant vapor into a liquid refrigerant according to the cooling air. In this example, the condensing fan 32 is an adjustable-speed fan, which can automatically adjust the fan speed according to the demand of the condenser 31 for cooling air. For the convenience of overhauling the condenser 31, a valve is installed on the high-pressure side of the condenser 31. Thus, when overhauling the condenser 31, the valve is first opened to relieve pressure to avoid harm to the maintenance personnel caused by high-pressure gas.

[0041] The heating module 4 is adjacent to the refrigeration module 3, and at the same time, only one of the heating module 4 and the refrigeration module 3 is in a working state at the same time, so as to avoid the situation of both heating and cooling the refrigerant. Specifically, the heating module 4 includes a liquid receiver 41 and an electric heating tape 42. The electric heating tape 42 is coiled around the outer side wall of the bottom of the liquid receiver 41 in a snake shape. The charging end of the electric heating tape 42 is connected to a power supply, and an electric switch is provided on the line connecting the power supply and the electric heating tape 42. The electric switch is controlled by a main controller, and the main controller refers to a central control device with system data processing, gateway communication connection, and centralized control capabilities in the energy storage thermal management system. When the heating module 4 works, the main controller first drives the electric switch to close to conduct the power supply and the electric heating tape 42, and the power supply supplies power to the electric heating tape 42. The electric heating tape 42 generates heat when powered on to achieve the purpose of heating the refrigerant stored in the liquid receiver 41.

[0042] During actual use, a drying filter 8 is also provided at the output end of the liquid receiver 41. The drying filter 8 is used to filter out impurities in the refrigerant output by the liquid receiver 41.

[0043] The driving module 5 is used to drive the refrigerant to perform a heat exchange cycle. The driving module 5 includes a first driving sub-module 51 and a second driving sub-module 52. The first driving sub-module 51 is disposed at the input end of the condenser 31, and the second driving sub-module 52 is disposed at the output end of the liquid storage device 41. Specifically, the first driving sub-module 51 includes a compressor 511 and a first sensor group 512. The first sensor group 512 is composed of various types of sensors. In this example, the first sensor group 512 includes a temperature sensor and a pressure sensor. The temperature sensor is used to detect the temperature of the refrigerant entering the condenser 31, and the pressure sensor is used to detect the pressure of the refrigerant entering the condenser 31. Both the temperature sensor and the pressure sensor are communicatively connected to the above-mentioned main controller, and the main controller is also connected to the control end of the compressor 511. The main controller is used to intelligently control the compression rate of the compressor 511 according to the temperature collected by the temperature sensor and the pressure collected by the pressure sensor, so as to achieve the purpose of intelligently adjusting the temperature and pressure of the refrigerant flowing into the condenser 31. The second driving sub-module 52 includes a metering pump 521, a solenoid valve 522, and an electronic expansion valve 523. The metering pump 521 and the solenoid valve 522 are connected in series to form a pumping channel, and this pumping channel is arranged in parallel with the electronic expansion valve 523. That is to say, the second driving sub-module 52 contains two channels. One of them is the pumping channel, and the refrigerant flow rate in the pumping channel can be increased by starting the metering pump 521. For those without pumping requirements for the refrigerant flow rate, the electronic expansion valve 523 can be opened, and the refrigerant is transmitted through the channel where the electronic expansion valve 523 is located.

[0044] The heat exchange module 6 is composed of a plurality of cold plates 61 arranged in parallel. The cold plates 61 are mainly made of hot-rolled plates, specifically steel plates obtained by subjecting hot-rolled plates to a series of cold rolling processes, and their heat conduction performance is better than that of ordinary steel plates. Each cold plate 61 is coiled in a serpentine shape on the outer sidewall of the battery or on the outer sidewall at the bottom of the battery. The cold plate 61 is hollow, and the internal space is used for the refrigerant to flow, so as to heat or cool the battery in contact with it. In this example, in order to be able to precisely heat or cool any battery, a liquid solenoid valve 62 is provided at the input end of each cold plate 61, and the flow rate of the refrigerant entering the cold plate 61 is controlled by the liquid solenoid valve 62. In addition, a self-sealing ball valve is provided at the output end of each cold plate 61. When repairing the cold plate 61, first relieve the pressure through the self-sealing ball valve, and then perform the repair to ensure the personal safety of the maintenance personnel.

[0045] The processing module 7 and the heat exchange module 6 are adjacent, and the processing module 7 is arranged at the output end of the heat exchange module 6. The processing module 7 includes a gas-liquid separator 71 and a second sensor group 72. The second sensor group 72 is composed of various types of sensors. In this example, the second sensor group 72 is also composed of a temperature sensor and a pressure sensor. The temperature sensor is used to detect the temperature of the refrigerant output by the gas-liquid separator 71, and the pressure sensor is used to detect the pressure of the refrigerant output by the gas-liquid separator 71. Both the temperature sensor and the pressure sensor are also communicatively connected to the above-mentioned main controller, and the main controller is also connected to the control end of the gas-liquid separator 71. The main controller is used to intelligently control the separation rate of the gas-liquid separator 71 according to the temperature collected by the temperature sensor and the pressure collected by the pressure sensor. In addition, a low-pressure switch is arranged at the output end of the gas-liquid separator 71, and the control end of the low-pressure switch is connected to the main controller. The low-pressure switch is used to automatically turn off the electrical switch of the gas-liquid separator 71 when the pressure in the gas-liquid separator 71 is less than the pressure threshold, so as to ensure the safe and stable operation of the gas-liquid separator 71. At the same time, a valve is also installed on the low-pressure side of the gas-liquid separator 71, so that when the gas-liquid separator 71 is overhauled, the valve is opened to relieve pressure, avoiding personal injury to the maintenance personnel caused by low-pressure gas.

[0046] It should be noted that the output end of the processing module 7 is connected to the refrigeration module 3 through the first driving sub-module 51. In addition, a conveying channel is also arranged between the processing module 7 and the refrigeration module 3. A one-way valve 9 is arranged on the conveying channel. That is to say, there are two transmission paths for the refrigerant entering the condenser 31 from the gas-liquid separator 71. One is transmitted through the channel where the first driving module 5 is located, and the other is transmitted through the channel where the one-way valve 9 is located, so as to facilitate the selection of an appropriate transmission path in different application scenarios.

[0047] It should also be noted that an independent temperature sensor is arranged in the environment where the battery is located. Hereinafter, the environment where the battery is located is referred to as the target environment. The temperature sensor in the target environment is used to detect the temperature of the target environment and transmit the detected temperature to the main controller. In addition, the main controller is also communicatively connected to the temperature acquisition system arranged on the battery. The temperature acquisition system is a set of sensors originally on the battery for acquiring the battery temperature. The main controller obtains the temperature of the battery through the temperature acquisition system.

[0048] In actual use, the main controller dynamically adjusts the temperature of the refrigerant according to the temperature of the target environment, the temperature of the refrigerant, and the temperature of the battery, and through the heat exchange between the refrigerant and the battery, so as to ensure that the battery is always within the working temperature range. In order to illustrate the process of the main controller controlling the temperature of the refrigerant, the present application proposes a heat management method for an energy storage heat management system, and this method is applied to the main controller. As Figure 2As shown in the figure, the main process of the heat control method for the energy storage thermal management system is described as follows.

[0049] Step S1: Obtain the temperature of the target environment, the temperature of the refrigerant, and the temperature of the battery.

[0050] As can be seen from the embodiments of the above system, the temperature of the target environment is collected by the temperature sensor set in the target environment, the temperature of the refrigerant can be collected by the temperature sensor in the first sensor group 512, and the temperature of the battery is collected by the temperature collection system on the battery. The main controller is communicatively connected to the temperature sensor in the target environment, the temperature sensor in the first sensor group 512, and the temperature collection system respectively, so as to obtain the temperature of the target environment, the temperature of the refrigerant, and the temperature of the battery respectively.

[0051] Step S2: When the temperature of the target environment is higher than the first temperature threshold, generate a first control strategy, and the first control strategy is used to perform primary heat dissipation on the refrigerant.

[0052] Based on the obtained temperature of the target environment, the temperature of the refrigerant, and the temperature of the battery, first judge whether the temperature of the target environment satisfies:

[0053] Temperature of the target environment > first temperature threshold. The first temperature threshold means that when the temperature of the target environment reaches this first temperature threshold, the temperature of the target environment will be conducted to the battery through the space medium, exacerbating the increase in the temperature of the battery. In this example, the first temperature threshold is 20 °C.

[0054] If the temperature of the target environment satisfies the above conditions, then generate a first control strategy. Since the first control strategy not only needs to reduce the influence of the temperature of the target environment on the temperature of the battery, but also needs to reduce the heat generated by the battery itself during operation, when the temperature of the target environment is greater than 20 °C, the heat requirement for cooling the refrigerant is relatively large. Therefore, the first control strategy is also called the direct expansion mechanical refrigeration cycle, and using the direct expansion mechanical refrigeration cycle to dissipate heat from the refrigerant is called primary heat dissipation. Specifically, the first control strategy is: start the compressor 511 and the condenser fan 32, close the metering pump 521 and the solenoid valve 522. The compressor 511 drives the refrigerant to enter the condenser 31 from the gas-liquid separator 71, and after being cooled by the condenser fan 32, it passes through the liquid receiver 41 and the dryer filter 8 in sequence, and is throttled and depressurized by the electronic expansion valve 523 and then enters each cold plate 61. It is also possible to determine the battery that needs to be cooled according to actual needs, so as to only open the cold plate 61 corresponding to the battery that needs to be cooled, that is, open the liquid solenoid valve 62 on the input end of the cold plate 61, and adjust the refrigerant flow rate into the cold plate 61 as needed. After the refrigerant flowing through the cold plate 61 absorbs the heat of the battery in contact with the cold plate 61, it enters the gas-liquid separator 71 to complete a mechanical refrigeration cycle.

[0055] It should be noted that during the mechanical refrigeration cycle of the refrigerant, the main controller still continuously compares the temperature of the target environment with the first temperature threshold. If the temperature of the target environment always remains higher than the first temperature threshold, the main controller also always uses the first control strategy to control the energy storage thermal management system until the temperature of the target environment no longer meets the condition of being higher than the first temperature threshold.

[0056] If the temperature of the target environment does not meet the above conditions, then proceed to step S3.

[0057] Step S3: When the temperature difference between the refrigerant and the temperature of the target environment is higher than the difference threshold, generate a second control strategy. The second control strategy is used for secondary heat dissipation of the refrigerant, and the heat dissipated in secondary heat dissipation is less than the heat dissipated in primary heat dissipation.

[0058] When the temperature of the target environment ≤ the first temperature threshold, calculate the temperature difference between the refrigerant and the temperature of the target environment, and determine whether this difference satisfies:

[0059] Difference > difference threshold. The difference threshold means that when the temperature difference between the refrigerant and the temperature of the target environment reaches this difference threshold, part of the heat of the battery will be conducted to the target environment through the space medium.

[0060] If this difference satisfies the above conditions, then generate a second control strategy. Since when the difference is greater than the difference threshold, part of the heat of the battery will be conducted to the target environment through the space medium, reducing the heat that the refrigerant needs to take away in the heat exchange cycle. Therefore, the second control strategy is also called the natural cooling cycle. Specifically, the second control strategy is: turn off the compressor 511, start the condenser fan 32, the metering pump 521 and the solenoid valve 522. The refrigerant enters the condenser 31 from the gas-liquid separator 71, is dissipated by the condenser fan 32, then passes through the liquid receiver 41 and the dryer filter 8 in sequence, and enters each cold plate 61 after the pumping pressure is increased by the metering pump 521. It is also possible to determine the batteries that need to be cooled according to actual needs, so as to only turn on the cold plates 61 corresponding to the batteries that need to be cooled, that is, turn on the liquid solenoid valve 62 on the input end of the cold plate 61, and adjust the refrigerant flow rate entering the cold plate 61 as needed. After the refrigerant flowing through the cold plate 61 absorbs the heat of the battery in contact with the cold plate 61, it enters the gas-liquid separator 71, completing a natural cooling cycle.

[0061] In the natural cooling cycle, the compressor 511 is in the off state, and the condenser fan 32 dissipates heat from the refrigerant. The refrigerant takes away the excess heat of the battery during the heat exchange cycle, that is, it not only achieves energy consumption savings but also can dissipate heat from the battery. Therefore, using the natural cooling cycle to dissipate heat from the refrigerant is called secondary heat dissipation. Moreover, the heat absorbed by the refrigerant is the excess heat that the target environment cannot absorb, so the heat dissipated in secondary heat dissipation is usually less than the heat dissipated in primary heat dissipation.

[0062] If the difference between the temperature of the refrigerant and the temperature of the target environment does not meet the above conditions, then proceed to step S4.

[0063] Step S4: When the temperature of the battery is lower than the second temperature threshold, generate a third control strategy, which is used to heat the refrigerant.

[0064] When the difference ≤ the difference threshold, determine whether the temperature of the battery satisfies:

[0065] The temperature of the battery < the second temperature threshold, where the second temperature threshold refers to the minimum value of the operating temperature range of the battery.

[0066] If the temperature of the battery meets the above conditions, then generate a third control strategy. The third control strategy is mainly to first heat the refrigerant and then heat the battery through the refrigerant. Specifically, the third control strategy is: turn off the compressor 511 and the condenser fan 32, turn on the electric heating belt 42, the metering pump 521 and the solenoid valve 522. The refrigerant flows from the gas-liquid separator 71 through the condenser 31 and then enters the liquid receiver 41. The electric heating belt 42 heats the refrigerant in the liquid receiver 41. After heating, the liquid receiver 41 outputs the refrigerant. The refrigerant passes through the dryer filter 8 and then enters each cold plate 61 after the pumping pressure is increased by the metering pump 521. It is also possible to determine the battery that needs to be warmed up according to actual needs, so as to only turn on the cold plate 61 corresponding to the battery that needs to be warmed up, that is, turn on the liquid solenoid valve 62 on the input end of the cold plate 61, and adjust the flow rate of the refrigerant entering the cold plate 61 as needed. The refrigerant flowing through the cold plate 61 dissipates heat to the cold plate 61, and then the cold plate 61 conducts the heat to the contacted battery. Finally, the refrigerant after dissipating heat enters the gas-liquid separator 71 to complete a low-temperature heating cycle.

[0067] If the temperature of the battery does not meet the above conditions, the main controller does not output any control strategy, and the energy storage thermal management system is in a dormant state at this time.

[0068] In summary, the implementation principle of the heat control method for the energy storage thermal management system according to the embodiments of the present application is as follows: when the temperature of the target environment is too high, in order to prevent the temperature of the target environment from exacerbating the temperature rise of the battery, the compressor 511 is started. With the cooperation of the compressor 511 and the condenser fan 32, the refrigerant entering the heat exchange cycle takes away the heat of the battery, ensuring that the battery is within the working temperature range; when the temperature of the refrigerant is higher than the temperature of the target environment by a certain value, not only does the refrigerant dissipate heat from the battery, but the target environment also absorbs some of the heat of the battery. Therefore, at this time, only the condenser fan 32 is used to dissipate heat from the refrigerant, and the refrigerant entering the heat exchange cycle can take away the excess heat of the battery, ensuring that the battery is within the working temperature range; when the temperature of the battery is too low, the refrigerant is heated by the electric heating tape 42, and the refrigerant entering the heat exchange cycle can provide the required heat for the battery, ensuring that the temperature of the battery enters the working temperature range, thereby ensuring the safe and stable operation of the battery. It can be seen from this that the energy storage thermal management system of the present application can adopt different control strategies to dynamically adjust the heat of the refrigerant in the energy storage thermal management system, so as to ensure that the heat of the refrigerant can support the battery to be within the working temperature range.

[0069] The above description is only a preferred embodiment of the present application and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the foregoing disclosure concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An energy storage thermal management system, characterized in that: It comprises an energy storage circuit (2) and a refrigeration module (3), a heating module (4), a driving module (5) and a heat exchange module (6) arranged on the energy storage circuit (2); The energy storage circuit (2) is composed of pipes connected end to end, and a refrigerant is arranged in the pipes; The refrigeration module (3) is used to dissipate heat from the refrigerant; The heating module (4) is used to heat the refrigerant; The heating module (4) comprises a liquid reservoir (41) and an electric heating belt (42) arranged at the bottom of the liquid reservoir (41); When the heating module (4) is working, the main controller first drives the electric switch to close so as to conduct the power supply and the electric heating belt (42), and the power supply supplies power to the electric heating belt (42), so that the electric heating belt (42) generates heat to achieve the purpose of heating the refrigerant stored in the liquid storage device (41); The driving module (5) is used to drive the refrigerant to circulate in the pipeline; The driving module (5) comprises a first driving submodule (51) and a second driving submodule (52), wherein the first driving submodule (51) is arranged at the input end of the cooling module (3), and the second driving submodule (52) is arranged at the output end of the heating module (4); Also includes a master controller; The first driving submodule (51) comprises a compressor (511) and a first sensor group (512), the first sensor group (512) is communicatively connected to a main controller, the main controller is connected to a control end of the compressor (511), and the first sensor group (512) is composed of multiple types of sensors; The first sensor group (512) includes a temperature sensor and a pressure sensor; The temperature sensor is used to detect the temperature of the refrigerant entering the condenser (31); The pressure sensor is used to detect the pressure of the refrigerant entering the condenser (31); The second driving submodule (52) comprises a quantitative pump (521), a solenoid valve (522) and an electronic expansion valve (523); The metering pump (521) and the solenoid valve (522) are connected in series to form a pumping channel; The electronic expansion valve (523) is arranged in parallel with the pumping channel; The heat exchange module (6) is in contact with the target device (1), and is used to transfer the temperature of the higher temperature of the refrigerant and the target device (1) to the other. The target device (1) is an electronic device whose temperature needs to be maintained within an operating temperature range, and the operating temperature range refers to the temperature fluctuation range of the target device (1) when it is operating normally.

2. The energy storage thermal management system according to claim 1, characterized in that: The refrigeration module (3) comprises a condenser (31) and a condensing fan (32), and the air inlet of the condenser (31) is connected to the air outlet of the condensing fan (32).

3. The energy storage thermal management system according to claim 1, characterized in that: Also includes a processing module (7); The processing module (7) comprises a gas-liquid separator (71) and a second sensor group (72), wherein the second sensor group (72) is communicatively connected to the main controller, the main controller is connected to the control end of the gas-liquid separator (71), and the second sensor group (72) is composed of multiple types of sensors.

4. The energy storage thermal management system according to claim 1, characterized in that: The heat exchange module (6) is composed of a plurality of cold plates (61) arranged in parallel, each cold plate (61) is in contact with a target device (1), and a liquid electromagnetic valve (62) is arranged on the input end of each cold plate (61).

5. A heat control method for an energy storage thermal management system, applied to a system as claimed in any one of claims 1 to 4, characterized in that: include: Acquiring the temperature of a target environment, the temperature of a refrigerant, and the temperature of a target device (1), wherein the target environment is the environment in which the target device (1) is located; When the temperature of the target environment is higher than a first temperature threshold, generating a first control strategy, wherein the first control strategy is used to perform primary heat dissipation on the refrigerant; When the difference between the temperature of the refrigerant and the temperature of the target environment is higher than a difference threshold, a second control strategy is generated, wherein the second control strategy is used to perform secondary heat dissipation on the refrigerant, and the heat of the secondary heat dissipation is less than the heat of the primary heat dissipation; When the temperature of the target device (1) is lower than a second temperature threshold, a third control strategy is generated, wherein the third control strategy is used to heat the refrigerant, and the second temperature threshold refers to the minimum value of the operating temperature range of the target device (1).

6. The heat management method of the energy storage thermal management system according to claim 5, characterized in that: The first control strategy is: starting the compressor (511) and the condensing fan (32), and closing the metering pump (521) and the solenoid valve (522); The second control strategy is: shut down the compressor (511), start the condensing fan (32), the metering pump (521) and the solenoid valve (522); The third control strategy is: turning off the compressor (511) and the condensing fan (32), and starting the electric heating belt (42), the metering pump (521) and the solenoid valve (522).

Images