Gravity liquid supply system and method for energy-saving type energy storage battery liquid cooling unit

Abstract

The invention provides a gravity liquid supply system and method for an energy-saving energy storage battery liquid cooling unit, and the system comprises a liquid condensation module which is used for condensing a liquid refrigerant in an outer heat exchanger; the first control module is used for controlling the first one-way valve and enabling the liquid refrigerant in the outer heat exchanger to enter the medium heat exchanger through the first one-way valve under the action of gravitational potential energy of the outer heat exchanger and the medium heat exchanger; the gaseous condensation module is used for carrying out heat exchange evaporation on a liquid condensing agent and a cooling medium in the medium heat exchanger to generate a gaseous refrigerant; the second control module is used for controlling the second one-way valve and transmitting the gaseous refrigerant back into the outer heat exchanger through the second one-way valve under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, and the gaseous refrigerant exchanges heat with external low-temperature air and is condensed into a liquid refrigerant; by reasonably utilizing natural power such as gravitational potential energy and pressure difference, dependence on external power is reduced, and energy loss and operation cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gravity liquid supply control of battery liquid cooling units, and in particular to a gravity liquid supply system and method for an energy-saving energy storage battery liquid cooling unit. Background Art

[0002] At present, with the continuous growth of energy demand and the vigorous development of renewable energy, energy storage technology has become increasingly important in modern society. In energy storage battery systems, temperature control has a vital impact on battery performance, life and safety.

[0003] However, the traditional liquid cooling unit liquid supply method often has some shortcomings, such as high consumption caused by turning on the compressor, liquid pump and other consumption components. In addition, in practical applications, due to the large scale of energy storage batteries, the liquid cooling unit needs to operate stably for a long time, which puts higher requirements on the reliability and energy saving of the liquid supply system.

[0004] Therefore, in order to overcome the above technical problems, the present invention provides a gravity liquid supply system and method for an energy-saving energy storage battery liquid cooling unit. Summary of the invention

[0005] The present invention provides a gravity liquid supply system and method for an energy-saving energy storage battery liquid cooling unit, in which an outer heat exchanger is placed at the top and a medium heat exchanger is placed at the bottom in a unit box, and a height difference is formed between the outer heat exchanger and the medium heat exchanger. The liquid refrigerant condensed in the outer heat exchanger overcomes the pipeline resistance and static pressure difference between the outer heat exchanger and the medium heat exchanger under the action of gravity, enters the medium heat exchanger through a first one-way valve, exchanges heat with the cooling medium, and evaporates into a gaseous refrigerant. Under the pressure difference between the medium heat exchanger and the outer heat exchanger, The gaseous refrigerant overcomes the pipeline resistance, passes through the second one-way valve, returns to the outer heat exchanger, exchanges heat with the outside low-temperature air, and condenses into liquid refrigerant. This cycle forms a gravity liquid supply method; this method has the advantages of energy saving, high efficiency, stable operation, and low cost. At the same time, by rationally utilizing natural forces such as gravitational potential energy and pressure difference, it reduces dependence on external power, helps to reduce energy loss and operating costs. At the same time, through the control of the first one-way valve and the second one-way valve, it helps to ensure the effectiveness and intelligence of the gravity liquid supply operation of the energy-saving energy storage battery liquid cooling unit.

[0006] An energy-saving energy storage battery liquid cooling unit gravity liquid supply system, comprising:

[0007] A liquid condensation module, used for condensing liquid refrigerant in the outer heat exchanger;

[0008] A first control module is used to control the first one-way valve, and to allow the liquid refrigerant in the outer heat exchanger to enter the medium heat exchanger through the first one-way valve under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger;

[0009] A gaseous condensation module is used to evaporate the liquid condensing agent and the cooling medium in a medium heat exchanger to generate a gaseous refrigerant;

[0010] The second control module is used to control the second one-way valve, and under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant is returned to the outer heat exchanger through the second one-way valve, and condensed into liquid refrigerant by heat exchange with the external low-temperature air.

[0011] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a liquid condensation module, comprises:

[0012] A monitoring dimension determination unit, used to obtain the monitoring dimension of the outer heat exchanger when the liquid refrigerant is condensed in the outer heat exchanger, and determine the safety interval corresponding to each monitoring dimension;

[0013] A monitoring unit, used to monitor the working state of the outer heat exchanger according to the monitoring dimensions and obtain monitoring data of each monitoring dimension;

[0014] The first alarm unit is used to perform a first alarm operation when the monitoring data corresponding to each monitoring dimension does not belong to the corresponding safety interval.

[0015] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit is provided. In the energy-saving energy storage battery liquid cooling unit, the outer heat exchanger is placed at the top and the medium heat exchanger is placed at the bottom, forming a height difference between the outer heat exchanger and the medium heat exchanger, and generating gravitational potential energy according to the height difference.

[0016] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a first control module, comprises:

[0017] A pipeline resistance determination unit, used to obtain the pipeline resistance between the outer heat exchanger and the medium heat exchanger, and determine the minimum gravitational potential energy according to the pipeline resistance;

[0018] a simulation unit, for obtaining the rated weight of the liquid refrigerant in the outer heat exchanger according to the minimum gravitational potential energy, obtaining a preset increment, and simulating the rated weight of the liquid refrigerant according to the preset increment in a computer to obtain an optimal weight of the liquid refrigerant;

[0019] The first valve control unit is used for:

[0020] Generate a control instruction for the first one-way valve according to the condensation state and optimal weight of the condensed liquid refrigerant in the outer heat exchanger, and open the first one-way valve according to the control instruction, so that the liquid refrigerant in the outer heat exchanger enters the medium heat exchanger through the first one-way valve under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger;

[0021] When the outflow amount of the liquid refrigerant reaches the optimal weight, the first one-way valve is closed according to the control instruction.

[0022] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a simulation unit, comprises:

[0023] Rated weight acquisition subunit, used for:

[0024] Obtain the length of the pipeline between the outer heat exchanger and the medium heat exchanger, and at the same time, determine the acceleration of gravity;

[0025] Calculate the product of the pipeline length and the gravitational acceleration, and calculate the ratio of the minimum gravitational potential energy to the product, and obtain the rated weight based on the calculation results;

[0026] A simulation construction subunit is used to obtain operating environment parameters of the battery liquid cooling unit, and to perform simulation construction in a computer according to the operating environment parameters of the battery liquid cooling unit, and to construct a simulated battery liquid cooling unit in the computer according to the simulation construction results;

[0027] A simulation subunit, used to read a preset increment, and to sequentially increase the rated weight of the liquid refrigerant according to the preset increment when performing gravity natural cooling in a simulated battery liquid cooling unit, and at the same time, to record the refrigeration temperature value in real time;

[0028] The target change curve determination subunit is used to:

[0029] Get the initial temperature value;

[0030] Construct a rectangular coordinate system with the weight of liquid refrigerant as the independent variable and the refrigeration temperature as the dependent variable;

[0031] The initial temperature value, each preset increment, and the corresponding refrigeration temperature value under each preset increment are mapped in a rectangular coordinate system to obtain a target change curve of the refrigeration temperature value changing with the preset increment;

[0032] Optimal weight determination subunit for:

[0033] Reading the target change curve, determining the peak point of the target change curve, and determining the target weight of the liquid refrigerant corresponding to the peak point of the target change curve;

[0034] Obtain the rated load weight of the outer heat exchanger and compare the rated load weight with the target weight;

[0035] When the rated load weight is equal to or greater than the target weight, the target weight is taken as the optimal weight of the liquid refrigerant;

[0036] When the rated load weight is less than the target weight, the rated load weight is used as the optimal weight of the liquid refrigerant.

[0037] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a first valve control unit, comprises:

[0038] The instruction element generation subunit is used to:

[0039] After the outer heat exchanger completes the condensation operation of the cold liquid refrigerant, an opening instruction element of the first one-way valve is generated;

[0040] generating a closing instruction element for the first one-way valve according to the optimal weight;

[0041] The control instruction generation subunit is used to integrate the opening instruction element and the closing instruction element to obtain the control instruction for the first one-way valve.

[0042] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a gas condensation module, comprises:

[0043] The temperature acquisition unit is used to collect the current temperature data of the medium heat exchanger and obtain the standard temperature range for heat exchange and evaporation in the medium heat exchanger;

[0044] A judgment unit, used for:

[0045] Compare the current temperature data of the medium heat exchanger with the standard temperature range to determine whether heat exchange evaporation between the liquid condensing agent and the cooling medium can be performed;

[0046] When the current temperature data of the medium heat exchanger is within the standard temperature range, it is determined that the liquid condensing agent and the cooling medium can be heat exchanged and evaporated to generate gaseous refrigerant;

[0047] Otherwise, it is determined that the heat exchange evaporation between the liquid condensing agent and the cooling medium cannot be performed;

[0048] The second alarm unit is used to perform a second alarm operation when heat exchange and evaporation between the liquid condensing agent and the cooling medium cannot be performed.

[0049] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, the second control module, comprises:

[0050] Differential pressure monitoring unit for:

[0051] The internal structural features of the medium heat exchanger and the external heat exchanger are respectively obtained, and key position points are respectively determined in the medium heat exchanger and the external heat exchanger based on the internal structural features;

[0052] Provide installation guidance for the pressure sensor based on key position points, and obtain real-time pressure data corresponding to the medium heat exchanger and the external heat exchanger based on the installation guidance results;

[0053] Determine the pressure difference between the medium heat exchanger and the outer heat exchanger based on the real-time pressure data, and control the second one-way valve to open when the pressure difference meets a preset threshold;

[0054] Second valve control unit, for:

[0055] Extracting a target amount of gaseous refrigerant based on the opening result, and determining the pressure difference and the target amount as a first flow parameter of the gaseous refrigerant;

[0056] Acquire a size parameter of the second one-way valve, and determine the size parameter as a second flow parameter of the gaseous refrigerant, and at the same time, determine the opening time of the second one-way valve based on the first flow parameter and the second flow parameter, and perform closing control on the second one-way valve based on the opening time;

[0057] The heat exchange monitoring unit is used to exchange heat between the external low-temperature air and the gaseous refrigerant based on the shutdown control result, and to monitor the heat exchange process in real time.

[0058] Preferably, a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit and a heat exchange monitoring unit include:

[0059] The result acquisition subunit is used to obtain the real-time monitoring results of the heat exchange process, and when the real-time monitoring results determine that the heat exchange is completed, re-check the external low-temperature air;

[0060] The evaluation subunit is used to extract the initial temperature of the outside low-temperature air based on the real-time monitoring results, and compare the difference between the re-test results and the initial temperature to obtain the cooling efficiency of the gravity liquid supply of the battery liquid cooling unit;

[0061] The optimization subunit is used to optimize the gravity liquid supply strategy of the battery liquid cooling unit when the cooling efficiency does not meet the preset efficiency threshold until the preset efficiency threshold is met.

[0062] A gravity liquid supply method for an energy-saving energy storage battery liquid cooling unit, comprising:

[0063] Step 1: Condensing liquid refrigerant in the outer heat exchanger;

[0064] Step 2: Control the first one-way valve, and under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger, the liquid refrigerant in the outer heat exchanger passes through the first one-way valve and enters the medium heat exchanger;

[0065] Step 3: In a medium heat exchanger, the liquid condensing agent is evaporated by heat exchange with the cooling medium to generate a gaseous refrigerant;

[0066] Step 4: Control the second one-way valve, and under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant is returned to the outer heat exchanger through the second one-way valve, and condensed into liquid refrigerant by heat exchange with the outside low-temperature air.

[0067] Compared with the prior art, the present invention has the following beneficial effects:

[0068] In the unit box, the outer heat exchanger is placed at the top and the medium heat exchanger is placed at the bottom, forming a height difference between the outer heat exchanger and the medium heat exchanger. The liquid refrigerant condensed in the outer heat exchanger overcomes the pipeline resistance and static pressure difference between the outer heat exchanger and the medium heat exchanger under the action of gravity, and enters the medium heat exchanger through the first one-way valve to exchange heat with the cooling medium and evaporate to become gaseous refrigerant. Under the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant overcomes the pipeline resistance, passes through the second one-way valve, returns to the outer heat exchanger to exchange heat with the outside low-temperature air and condenses into liquid refrigerant, and such a cycle forms a gravity liquid supply mode; this mode has the advantages of energy saving, high efficiency, stable operation and low cost. At the same time, by rationally utilizing natural forces such as gravitational potential energy and pressure difference, it reduces dependence on external power, helps to reduce energy loss and operating costs. At the same time, through the control of the first one-way valve and the second one-way valve, it helps to ensure the effectiveness and intelligence of the gravity liquid supply operation of the energy-saving energy storage battery liquid cooling unit.

[0069] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0070] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0072] Figure 1 This is a structural diagram of a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit in an embodiment of the present invention;

[0073] Figure 2 This is a structural diagram of a first control module in a gravity liquid supply system of an energy-saving energy storage battery liquid cooling unit in an embodiment of the present invention;

[0074] Figure 3 The present invention is a flow chart of a gravity liquid supply method for an energy-saving energy storage battery liquid cooling unit in an embodiment of the present invention. DETAILED DESCRIPTION

[0075] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0076] Embodiment 1:

[0077] This embodiment provides an energy-saving energy storage battery liquid cooling unit gravity liquid supply system, such as Figure 1 As shown, including:

[0078] A liquid condensation module, used for condensing liquid refrigerant in the outer heat exchanger;

[0079] A first control module is used to control the first one-way valve, and to allow the liquid refrigerant in the outer heat exchanger to enter the medium heat exchanger through the first one-way valve under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger;

[0080] A gaseous condensation module is used to evaporate the liquid condensing agent and the cooling medium in a medium heat exchanger to generate a gaseous refrigerant;

[0081] The second control module is used to control the second one-way valve, and under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant is returned to the outer heat exchanger through the second one-way valve, and condensed into liquid refrigerant by heat exchange with the external low-temperature air.

[0082] In this embodiment, controlling the first one-way valve and controlling the second one-way valve means controlling the opening and closing of the first one-way valve and the second one-way valve.

[0083] In this embodiment, in the energy-saving energy storage battery liquid cooling unit, the outer heat exchanger is placed at the top and the medium heat exchanger is placed at the bottom, forming a height difference between the outer heat exchanger and the medium heat exchanger, and gravitational potential energy is generated according to the height difference.

[0084] The working principle and beneficial effect of the above technical solution are that, in the unit box, the outer heat exchanger is placed at the top and the medium heat exchanger is placed at the bottom, and a height difference is formed between the outer heat exchanger and the medium heat exchanger. The liquid refrigerant condensed in the outer heat exchanger overcomes the pipeline resistance and static pressure difference between the outer heat exchanger and the medium heat exchanger under the action of gravity, and enters the medium heat exchanger through the first one-way valve to exchange heat with the cooling medium and evaporate to become a gaseous refrigerant. Under the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant overcomes the pipeline resistance, passes through the second one-way valve, returns to the outer heat exchanger to exchange heat with the outside low-temperature air and condenses into a liquid refrigerant, and such a cycle forms a gravity liquid supply mode; this mode has the advantages of energy saving, high efficiency, stable operation and low cost. At the same time, by reasonably utilizing natural forces such as gravitational potential energy and pressure difference, it reduces dependence on external power, helps to reduce energy loss and operating costs, and at the same time, through the control of the first one-way valve and the second one-way valve, it helps to ensure the effectiveness and intelligence of the gravity liquid supply operation of the energy-saving energy storage battery liquid cooling unit.

[0085] Embodiment 2:

[0086] Based on Example 1, this example provides a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, such as Figure 2 As shown, the liquid condensation module comprises:

[0087] A monitoring dimension determination unit, used to obtain the monitoring dimension of the outer heat exchanger when the liquid refrigerant is condensed in the outer heat exchanger, and determine the safety interval corresponding to each monitoring dimension;

[0088] A monitoring unit, used to monitor the working state of the outer heat exchanger according to the monitoring dimensions and obtain monitoring data of each monitoring dimension;

[0089] The first alarm unit is used to perform a first alarm operation when the monitoring data corresponding to each monitoring dimension does not belong to the corresponding safety interval.

[0090] In this embodiment, the monitoring dimensions may include: pressure monitoring, flow monitoring, liquid level monitoring, temperature monitoring, operating status monitoring, etc.

[0091] In this embodiment, the safety interval is the value range of the working state of the side heat exchanger when it is in normal operation corresponding to each monitoring dimension.

[0092] In this embodiment, the first alarm operation may be a sound and light alarm.

[0093] The working principle and beneficial effect of the above technical solution are: by determining the monitoring dimension when condensing liquid refrigerant in the outer heat exchanger, and determining the safety interval corresponding to the monitoring dimension, it is possible to effectively monitor the working state of the outer heat exchanger, thereby ensuring effective and stable operation when condensing liquid refrigerant in the outer heat exchanger.

[0094] Embodiment 3:

[0095] Based on Example 1, this embodiment provides a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, the first control module comprising:

[0096] A pipeline resistance determination unit, used to obtain the pipeline resistance between the outer heat exchanger and the medium heat exchanger, and determine the minimum gravitational potential energy according to the pipeline resistance;

[0097] a simulation unit, for obtaining the rated weight of the liquid refrigerant in the outer heat exchanger according to the minimum gravitational potential energy, obtaining a preset increment, and simulating the rated weight of the liquid refrigerant according to the preset increment in a computer to obtain an optimal weight of the liquid refrigerant;

[0098] The first valve control unit is used for:

[0099] Generate a control instruction for the first one-way valve according to the condensation state and optimal weight of the condensed liquid refrigerant in the outer heat exchanger, and open the first one-way valve according to the control instruction, so that the liquid refrigerant in the outer heat exchanger enters the medium heat exchanger through the first one-way valve under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger;

[0100] When the outflow amount of the liquid refrigerant reaches the optimal weight, the first one-way valve is closed according to the control instruction.

[0101] In this embodiment, the minimum gravitational potential energy determined according to the pipeline resistance can be that the gravitational potential energy overcomes the pipeline resistance, that is, the gravitational potential energy is greater than the pipeline resistance. Therefore, when the management resistance is 10, if it is accurate to 0.1, the minimum gravitational potential energy is 10.1; if it is accurate to 1, the minimum gravitational potential energy is 11.

[0102] The working principle and beneficial effects of the above technical solution are: first, the pipeline resistance between the outer heat exchanger and the medium heat exchanger is obtained to determine the minimum gravitational potential energy required to ensure that the liquid refrigerant can flow smoothly; then, the rated weight of the liquid refrigerant in the outer heat exchanger is determined based on the minimum gravitational potential energy, and a simulation is performed in a computer through a preset increment to find the optimal weight of the liquid refrigerant; then, based on the condensation state of the condensed liquid refrigerant in the outer heat exchanger and the determined optimal weight, an accurate control instruction for the first one-way valve is generated, the first one-way valve is opened to allow the liquid refrigerant to flow into the medium heat exchanger under the action of gravitational potential energy, and the first one-way valve is closed in time when the optimal weight is reached; precise control of the liquid supply is achieved, ensuring the efficiency and accuracy of the liquid supply, while also maximizing the use of gravitational potential energy to achieve energy saving.

[0103] Embodiment 4:

[0104] Based on Example 3, this embodiment provides a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a simulation unit, including:

[0105] Rated weight acquisition subunit, used for:

[0106] Obtain the length of the pipeline between the outer heat exchanger and the medium heat exchanger, and at the same time, determine the acceleration of gravity;

[0107] Calculate the product of the pipeline length and the gravitational acceleration, and calculate the ratio of the minimum gravitational potential energy to the product, and obtain the rated weight based on the calculation results;

[0108] A simulation construction subunit is used to obtain operating environment parameters of the battery liquid cooling unit, and to perform simulation construction in a computer according to the operating environment parameters of the battery liquid cooling unit, and to construct a simulated battery liquid cooling unit in the computer according to the simulation construction results;

[0109] A simulation subunit, used to read a preset increment, and to sequentially increase the rated weight of the liquid refrigerant according to the preset increment when performing gravity natural cooling in a simulated battery liquid cooling unit, and at the same time, to record the refrigeration temperature value in real time;

[0110] The target change curve determination subunit is used to:

[0111] Get the initial temperature value;

[0112] Construct a rectangular coordinate system with the weight of liquid refrigerant as the independent variable and the refrigeration temperature as the dependent variable;

[0113] The initial temperature value, each preset increment, and the corresponding refrigeration temperature value under each preset increment are mapped in a rectangular coordinate system to obtain a target change curve of the refrigeration temperature value changing with the preset increment;

[0114] Optimal weight determination subunit for:

[0115] Reading the target change curve, determining the peak point of the target change curve, and determining the target weight of the liquid refrigerant corresponding to the peak point of the target change curve;

[0116] Obtain the rated load weight of the outer heat exchanger and compare the rated load weight with the target weight;

[0117] When the rated load weight is equal to or greater than the target weight, the target weight is taken as the optimal weight of the liquid refrigerant;

[0118] When the rated load weight is less than the target weight, the rated load weight is used as the optimal weight of the liquid refrigerant.

[0119] In this embodiment, the acceleration due to gravity is known in advance, which is generally 9.8 m / s 2 .

[0120] In this embodiment, the operating environment parameters may be used to characterize the actual external environment state of the battery cooling unit, such as: ambient temperature, battery temperature, air flow rate, and pressure of the cooling system.

[0121] The working principle and beneficial effects of the above technical solution are: by obtaining the pipeline length and gravity acceleration to calculate the relevant data, and then determine the rated weight; then consider the operating environment parameters of the battery liquid cooling unit to simulate the natural cooling process of gravity and record the cooling temperature value; construct a rectangular coordinate system and map the relevant data to obtain the target change curve, and find the target weight corresponding to the peak point from the curve. Finally, the final optimal weight is determined by comparing with the rated load-bearing weight of the outer heat exchanger to ensure the safety and effectiveness of the system.

[0122] Embodiment 5:

[0123] Based on Example 3, this embodiment provides a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a first valve control unit, including:

[0124] The instruction element generation subunit is used to:

[0125] After the outer heat exchanger completes the condensation operation of the cold liquid refrigerant, an opening instruction element of the first one-way valve is generated;

[0126] generating a closing instruction element for the first one-way valve according to the optimal weight;

[0127] The control instruction generation subunit is used to integrate the opening instruction element and the closing instruction element to obtain the control instruction for the first one-way valve.

[0128] In this embodiment, the opening instruction element may be used to control the opening of the first one-way valve, and the closing instruction element may be used to control the closing of the first one-way valve.

[0129] In this embodiment, the control instruction consists of an opening instruction element and a closing instruction element.

[0130] The working principle and beneficial effect of the above technical solution are: by determining the opening instruction element and the closing instruction element, the generation of the control instruction can be effectively realized, thereby ensuring the effectiveness, accuracy and intelligence of the control of the first one-way valve.

[0131] Embodiment 6:

[0132] Based on Example 1, this embodiment provides a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, a gas condensation module, including:

[0133] The temperature acquisition unit is used to collect the current temperature data of the medium heat exchanger and obtain the standard temperature range for heat exchange and evaporation in the medium heat exchanger;

[0134] A judgment unit, used for:

[0135] Compare the current temperature data of the medium heat exchanger with the standard temperature range to determine whether heat exchange evaporation between the liquid condensing agent and the cooling medium can be performed;

[0136] When the current temperature data of the medium heat exchanger is within the standard temperature range, it is determined that the liquid condensing agent and the cooling medium can be heat exchanged and evaporated to generate gaseous refrigerant;

[0137] Otherwise, it is determined that the heat exchange evaporation between the liquid condensing agent and the cooling medium cannot be performed;

[0138] The second alarm unit is used to perform a second alarm operation when heat exchange and evaporation between the liquid condensing agent and the cooling medium cannot be performed.

[0139] In this embodiment, the standard temperature range may be pre-set and used to represent a suitable temperature range for heat exchange evaporation in the medium heat exchanger.

[0140] In this embodiment, the second alarm operation may be a sound and vibration alarm.

[0141] The working principle and beneficial effect of the above technical solution are: by collecting the current temperature data of the medium heat exchanger and accurately determining the standard temperature range for heat exchange evaporation in the medium heat exchanger, the monitoring of the temperature of the medium heat exchanger is effectively guaranteed, thereby ensuring the reliable and effective heat exchange evaporation in the medium heat exchanger.

[0142] Embodiment 7:

[0143] Based on Example 1, this embodiment provides a gravity liquid supply system for an energy-saving energy storage battery liquid cooling unit, and the second control module includes:

[0144] Differential pressure monitoring unit for:

[0145] The internal structural features of the medium heat exchanger and the external heat exchanger are respectively obtained, and key position points are respectively determined in the medium heat exchanger and the external heat exchanger based on the internal structural features;

[0146] Provide installation guidance for the pressure sensor based on key position points, and obtain real-time pressure data corresponding to the medium heat exchanger and the external heat exchanger based on the installation guidance results;

[0147] Determine the pressure difference between the medium heat exchanger and the outer heat exchanger based on the real-time pressure data, and control the second one-way valve to open when the pressure difference meets a preset threshold;

[0148] Second valve control unit, for:

[0149] Extracting a target amount of gaseous refrigerant based on the opening result, and determining the pressure difference and the target amount as a first flow parameter of the gaseous refrigerant;

[0150] Acquire a size parameter of the second one-way valve, and determine the size parameter as a second flow parameter of the gaseous refrigerant, and at the same time, determine the opening time of the second one-way valve based on the first flow parameter and the second flow parameter, and perform closing control on the second one-way valve based on the opening time;

[0151] The heat exchange monitoring unit is used to exchange heat between the external low-temperature air and the gaseous refrigerant based on the shutdown control result, and to monitor the heat exchange process in real time.

[0152] In this embodiment, the key position points can be suitable positions for installing pressure sensors, wherein the key position points are determined in the medium heat exchanger and the external heat exchanger according to the internal structural characteristics, for example: in the medium heat exchanger, the fluid inlet and outlet, the starting and ending points of the heat exchange tube bundle, the positions of the internal partitions and baffles, etc. are determined; in the external heat exchanger, the air inlet and outlet (in order to understand the pressure characteristics on the air side), the connection points with the medium heat exchanger, etc. are determined.

[0153] In this embodiment, the preset threshold value may be set in advance and used as a standard for measuring whether to open the second one-way valve.

[0154] In this embodiment, the first flow parameter may be determined based on the pressure difference and the target amount, and is used to control the flow rate of the gas refrigerator during circulation.

[0155] In this embodiment, the second flow parameter may be the amount of gas flow that can be passed through the second one-way valve in a unit time when the gas refrigerator is running under the limitation of the size parameter.

[0156] In this embodiment: the heat exchange monitoring unit includes: a result acquisition subunit, which is used to obtain real-time monitoring results of the heat exchange process, and when the real-time monitoring results determine that the heat exchange is completed, re-check the external low-temperature air; an evaluation subunit, which is used to extract the initial temperature of the external low-temperature air based on the real-time monitoring results, and compare the difference between the re-check result and the initial temperature to obtain the cooling efficiency of the gravity liquid supply of the battery liquid cooling unit; an optimization subunit, which is used to optimize the liquid supply strategy of the gravity liquid supply of the battery liquid cooling unit when the cooling efficiency does not meet the preset efficiency threshold until the preset efficiency threshold is met.

[0157] The above-mentioned preset efficiency threshold value may be set in advance and used as a measurement indicator to characterize the optimization of the liquid supply strategy.

[0158] The working principle and beneficial effects of the above technical solution are: by obtaining the internal structural characteristics of the medium heat exchanger and the outer heat exchanger, the key position points can be effectively determined, and then the key position points are determined to facilitate the effective installation of the pressure sensor, thereby ensuring the effectiveness and accuracy of the acquisition of real-time pressure data. When the pressure difference meets the preset threshold, the second one-way valve is controlled to open, thereby effectively ensuring the intelligence of the opening of the second one-way valve. By determining the first flow parameter and the second flow parameter, the opening time can be effectively determined, thereby ensuring the closing control of the second one-way valve, and effectively ensuring the intelligence, accuracy and effectiveness of the heat exchange process based on the gas refrigeration machine.

[0159] Embodiment 8:

[0160] This embodiment provides a gravity liquid supply method for an energy-saving energy storage battery liquid cooling unit, such as Figure 3 As shown, including:

[0161] Step 1: Condensing liquid refrigerant in the outer heat exchanger;

[0162] Step 2: Control the first one-way valve, and under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger, the liquid refrigerant in the outer heat exchanger passes through the first one-way valve and enters the medium heat exchanger;

[0163] Step 3: In a medium heat exchanger, the liquid condensing agent is evaporated by heat exchange with the cooling medium to generate a gaseous refrigerant;

[0164] Step 4: Control the second one-way valve, and under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant is returned to the outer heat exchanger through the second one-way valve, and condensed into liquid refrigerant by heat exchange with the outside low-temperature air.

[0165] The working principle and beneficial effect of the above technical solution are that, in the unit box, the outer heat exchanger is placed at the top and the medium heat exchanger is placed at the bottom, and a height difference is formed between the outer heat exchanger and the medium heat exchanger. The liquid refrigerant condensed in the outer heat exchanger overcomes the pipeline resistance and static pressure difference between the outer heat exchanger and the medium heat exchanger under the action of gravity, and enters the medium heat exchanger through the first one-way valve to exchange heat with the cooling medium and evaporate to become a gaseous refrigerant. Under the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant overcomes the pipeline resistance, passes through the second one-way valve, returns to the outer heat exchanger to exchange heat with the outside low-temperature air and condenses into a liquid refrigerant, and such a cycle forms a gravity liquid supply mode; this mode has the advantages of energy saving, high efficiency, stable operation and low cost. At the same time, by reasonably utilizing natural forces such as gravitational potential energy and pressure difference, it reduces dependence on external power, helps to reduce energy loss and operating costs, and at the same time, through the control of the first one-way valve and the second one-way valve, it helps to ensure the effectiveness and intelligence of the gravity liquid supply operation of the energy-saving energy storage battery liquid cooling unit.

[0166] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An energy-saving energy storage battery liquid cooling unit gravity liquid supply system, characterized in that: include: A liquid condensation module, used for condensing liquid refrigerant in the outer heat exchanger; A first control module is used to control the first one-way valve, and to allow the liquid refrigerant in the outer heat exchanger to enter the medium heat exchanger through the first one-way valve under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger; A gaseous condensation module is used to evaporate the liquid condensing agent and the cooling medium in a medium heat exchanger to generate a gaseous refrigerant; The second control module is used to control the second one-way valve, and under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant is returned to the outer heat exchanger through the second one-way valve, and condensed into liquid refrigerant by heat exchange with the external low-temperature air.

2. According to claim 1, a gravity liquid supply system for energy-saving energy storage battery liquid cooling unit is characterized in that: Liquid condensation module, comprising: A monitoring dimension determination unit, used to obtain the monitoring dimension of the outer heat exchanger when the liquid refrigerant is condensed in the outer heat exchanger, and determine the safety interval corresponding to each monitoring dimension; A monitoring unit, used to monitor the working state of the outer heat exchanger according to the monitoring dimensions and obtain monitoring data of each monitoring dimension; The first alarm unit is used to perform a first alarm operation when the monitoring data corresponding to each monitoring dimension does not belong to the corresponding safety interval.

3. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 1, characterized in that: In the energy-saving energy storage battery liquid cooling unit, the outer heat exchanger is placed at the top and the medium heat exchanger is placed at the bottom, forming a height difference between the outer heat exchanger and the medium heat exchanger, and generating gravitational potential energy according to the height difference.

4. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 1, characterized in that: The first control module comprises: A pipeline resistance determination unit, used to obtain the pipeline resistance between the outer heat exchanger and the medium heat exchanger, and determine the minimum gravitational potential energy according to the pipeline resistance; a simulation unit, for obtaining the rated weight of the liquid refrigerant in the outer heat exchanger according to the minimum gravitational potential energy, obtaining a preset increment, and simulating the rated weight of the liquid refrigerant according to the preset increment in a computer to obtain an optimal weight of the liquid refrigerant; The first valve control unit is used for: Generate a control instruction for the first one-way valve according to the condensation state and optimal weight of the condensed liquid refrigerant in the outer heat exchanger, and open the first one-way valve according to the control instruction, so that the liquid refrigerant in the outer heat exchanger enters the medium heat exchanger through the first one-way valve under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger; When the outflow amount of the liquid refrigerant reaches the optimal weight, the first one-way valve is closed according to the control instruction.

5. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 4, characterized in that: Simulation unit, including: Rated weight acquisition subunit, used for: Obtain the length of the pipeline between the outer heat exchanger and the medium heat exchanger, and at the same time, determine the acceleration of gravity; Calculate the product of the pipeline length and the gravitational acceleration, and calculate the ratio of the minimum gravitational potential energy to the product, and obtain the rated weight based on the calculation results; A simulation construction subunit is used to obtain operating environment parameters of the battery liquid cooling unit, and to perform simulation construction in a computer according to the operating environment parameters of the battery liquid cooling unit, and to construct a simulated battery liquid cooling unit in the computer according to the simulation construction results; A simulation subunit, used to read a preset increment, and to sequentially increase the rated weight of the liquid refrigerant according to the preset increment when performing gravity natural cooling in a simulated battery liquid cooling unit, and at the same time, to record the refrigeration temperature value in real time; The target change curve determination subunit is used to: Get the initial temperature value; Construct a rectangular coordinate system with the weight of liquid refrigerant as the independent variable and the refrigeration temperature as the dependent variable; The initial temperature value, each preset increment, and the corresponding refrigeration temperature value under each preset increment are mapped in a rectangular coordinate system to obtain a target change curve of the refrigeration temperature value changing with the preset increment; Optimal weight determination subunit for: Reading the target change curve, determining the peak point of the target change curve, and determining the target weight of the liquid refrigerant corresponding to the peak point of the target change curve; Obtain the rated load weight of the outer heat exchanger and compare the rated load weight with the target weight; When the rated load weight is equal to or greater than the target weight, the target weight is taken as the optimal weight of the liquid refrigerant; When the rated load weight is less than the target weight, the rated load weight is used as the optimal weight of the liquid refrigerant.

6. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 4, characterized in that: The first valve control unit comprises: The instruction element generation subunit is used to: After the outer heat exchanger completes the condensation operation of the cold liquid refrigerant, an opening instruction element of the first one-way valve is generated; generating a closing instruction element for the first one-way valve according to the optimal weight; The control instruction generation subunit is used to integrate the opening instruction element and the closing instruction element to obtain the control instruction for the first one-way valve.

7. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 1, characterized in that: Gas condensation module, including: The temperature acquisition unit is used to collect the current temperature data of the medium heat exchanger and obtain the standard temperature range for heat exchange and evaporation in the medium heat exchanger; A judgment unit, used for: Compare the current temperature data of the medium heat exchanger with the standard temperature range to determine whether heat exchange evaporation between the liquid condensing agent and the cooling medium can be performed; When the current temperature data of the medium heat exchanger is within the standard temperature range, it is determined that the liquid condensing agent and the cooling medium can be heat exchanged and evaporated to generate gaseous refrigerant; Otherwise, it is determined that the heat exchange evaporation between the liquid condensing agent and the cooling medium cannot be performed; The second alarm unit is used to perform a second alarm operation when heat exchange and evaporation between the liquid condensing agent and the cooling medium cannot be performed.

8. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 1, characterized in that: The second control module includes: Differential pressure monitoring unit for: The internal structural features of the medium heat exchanger and the external heat exchanger are respectively obtained, and key position points are respectively determined in the medium heat exchanger and the external heat exchanger based on the internal structural features; Provide installation guidance for the pressure sensor based on key position points, and obtain real-time pressure data corresponding to the medium heat exchanger and the external heat exchanger based on the installation guidance results; Determine the pressure difference between the medium heat exchanger and the outer heat exchanger based on the real-time pressure data, and control the second one-way valve to open when the pressure difference meets a preset threshold; Second valve control unit, for: Extracting a target amount of gaseous refrigerant based on the opening result, and determining the pressure difference and the target amount as a first flow parameter of the gaseous refrigerant; Acquire a size parameter of the second one-way valve, and determine the size parameter as a second flow parameter of the gaseous refrigerant, and at the same time, determine the opening time of the second one-way valve based on the first flow parameter and the second flow parameter, and perform closing control on the second one-way valve based on the opening time; The heat exchange monitoring unit is used to exchange heat between the external low-temperature air and the gaseous refrigerant based on the shutdown control result, and to monitor the heat exchange process in real time.

9. The energy-saving energy storage battery liquid cooling unit gravity liquid supply system according to claim 8, characterized in that: Heat exchange monitoring unit, including: The result acquisition subunit is used to obtain the real-time monitoring results of the heat exchange process, and when the real-time monitoring results determine that the heat exchange is completed, re-check the external low-temperature air; The evaluation subunit is used to extract the initial temperature of the outside low-temperature air based on the real-time monitoring results, and compare the difference between the re-test results and the initial temperature to obtain the cooling efficiency of the gravity liquid supply of the battery liquid cooling unit; The optimization subunit is used to optimize the gravity liquid supply strategy of the battery liquid cooling unit when the cooling efficiency does not meet the preset efficiency threshold until the preset efficiency threshold is met.

10. A gravity liquid supply method for an energy-saving energy storage battery liquid cooling unit, characterized in that: include: Step 1: Condensing liquid refrigerant in the outer heat exchanger; Step 2: Control the first one-way valve, and under the action of the gravitational potential energy of the outer heat exchanger and the medium heat exchanger, the liquid refrigerant in the outer heat exchanger passes through the first one-way valve and enters the medium heat exchanger; Step 3: In a medium heat exchanger, the liquid condensing agent is evaporated by heat exchange with the cooling medium to generate a gaseous refrigerant; Step 4: Control the second one-way valve, and under the action of the pressure difference between the medium heat exchanger and the outer heat exchanger, the gaseous refrigerant is returned to the outer heat exchanger through the second one-way valve, and condensed into liquid refrigerant by heat exchange with the outside low-temperature air.

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