Energy storage container battery pack water cooling circulation system and control method

Abstract

The invention discloses an energy storage container battery pack water cooling circulation system and a control method, and the method comprises the steps: detecting the temperature, water pressure and flow data of cooling water through a first detection assembly, sending temperature information to a judgment unit through a temperature sensor in the first detection assembly, and sending information to a buffer tank and a stop valve through the judgment unit; the stop valve is normally opened in a small cycle and completely closed in a large cycle, and a first control unit of the buffer tank achieves water supplement according to data; the first detection assembly can detect various data of cooling water so as to judge the load state of the battery, and the buffer tank and the stop valve can realize large and small circulation conversion operation after receiving information of the judgment unit; compared with the prior art, the battery cooling system can accurately detect the load condition of the battery, realize large and small circulation conversion according to the load condition, accurately realize the battery cooling effect, improve the efficiency, well adjust the starting number of the refrigeration assemblies, reduce the waste of cooling resources and reduce the operation cost.

Description

Technical Field

[0001] The present invention relates to a water cooling circulation system and a control method for a battery pack in an energy storage container, and in particular to a water cooling circulation system and a control method for a battery pack in an energy storage container. Background Art

[0002] With the rapid development of new energy technologies, especially the large-scale application of intermittent energy such as solar energy and wind energy, energy storage technology plays an increasingly important role in the power system. As an integrated energy storage solution, energy storage containers are widely used in various scenarios because of their easy transportation, installation and maintenance. However, the battery packs in the energy storage containers generate a lot of heat during the charging and discharging process, which places extremely high demands on the heat dissipation system.

[0003] Traditionally, the heat dissipation methods of energy storage container battery packs mainly include air cooling and water cooling, which are air cooling and water cooling respectively;

[0004] Air cooling: A fan blows air over the surface of the battery pack, using the convection heat transfer of the air to reduce the battery temperature. However, the efficiency of air cooling is relatively low and it is difficult to meet the heat dissipation requirements at high power density.

[0005] Water cooling: Through the circulating water system, cooling water is transported to the heat dissipation channels inside or outside the battery pack, and the heat conduction and convection of water are used to reduce the battery temperature. Compared with air cooling, water cooling has higher efficiency and better temperature uniformity.

[0006] Although the existing water cooling circulation system has met the heat dissipation requirements of the energy storage container battery pack to a certain extent, there are still some shortcomings. The existing system often adopts a simple temperature control strategy, which makes it difficult to achieve more precise temperature control. The refrigeration components will consume a lot of electricity during long-term operation, which increases the operating cost of the system and causes a waste of cooling resources. Summary of the invention

[0007] The present invention overcomes the deficiencies of the prior art and provides a water cooling circulation system and a control method for a battery pack of an energy storage container.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a water-cooling circulation system and control method for a battery pack in an energy storage container, comprising: a water-cooling valve chamber, a first channel connected to the output end of the water-cooling valve chamber, a degassing tank connected to the first channel, a second channel connected to the output end of the degassing tank, a refrigeration component connected to the second channel, and a third channel connected to the output end of the refrigeration component; the third channel is connected to the input end of the water-cooling valve chamber, a water replenishment device is arranged between the third channel and the degassing tank, the second channel is provided with a pump body assembly, the output end of the water-cooling valve chamber is provided with a first detection assembly, and the input end of the water-cooling valve chamber is provided with a second detection assembly; the refrigeration assembly is used to cool cooling water.

[0009] The water replenishment device includes: a fourth channel connected to the third channel, an ion exchanger and a water replenishment tank connected to the tail of the fourth channel, a fifth channel connected to the ion exchanger, a buffer tank connected to the fifth channel, and a sixth channel connected to the buffer tank; the sixth channel is connected to the degassing tank; a check valve and a stop valve are provided in the middle of the fourth channel;

[0010] The first detection component includes a temperature sensor, a flow sensor, a pressure sensor and a judgment unit connected to the temperature sensor; the temperature sensor is used to detect temperature information and send it, the judgment unit is used to receive temperature information and compare it with the warning temperature and send it, and the judgment unit is connected to the buffer tank and the stop valve.

[0011] In a preferred embodiment of the present invention, the buffer tank includes a tank body and a first control unit installed on the tank body; the tank body is connected to the sixth channel and the fifth channel, and the first control unit is connected to the judgment unit; the first control unit is connected to the first detection component.

[0012] In a preferred embodiment of the present invention, when the temperature information is greater than the warning temperature, the large circulation mode is turned on, the buffer tank is used to maintain the water pressure in the system, and the stop valve is completely closed.

[0013] In a preferred embodiment of the present invention, when the temperature information is lower than the warning temperature, the small circulation mode is turned on, the buffer tank is used to replenish the water in the system, and the stop valve is opened normally.

[0014] In a preferred embodiment of the present invention, the warning temperature is 35°C

[0015] In a preferred embodiment of the present invention, the second detection component includes a second temperature sensor, a second flow sensor, and a display unit connected to the second temperature sensor and the second flow sensor.

[0016] In a preferred embodiment of the present invention, the pump body assembly includes a first pump body, a second pump body and a third pump body connected in parallel with the first pump body, and a second control unit connected to the first pump body, the second pump body and the third pump body; the second control unit is connected to the judgment unit.

[0017] In a preferred embodiment of the present invention, the refrigeration component includes: a plurality of refrigerators arranged in parallel, and a controller connected to the plurality of refrigerators; the controller is connected to the temperature sensor and the flow sensor, and the controller is used to adjust the number of refrigerators opened.

[0018] In a preferred embodiment of the present invention, the controller adjusts the number of refrigerators turned on:

[0019]

[0020] N required is the number of refrigerators required;

[0021] m is the mass flow rate of cooling water;

[0022] c p is the specific heat capacity of cooling water;

[0023] ΔT is the current cooling water temperature T current With the target temperature T target The difference between

[0024] β is the weight factor of cooling water flow, which is used to adjust the influence of cooling water flow on cooling demand;

[0025] P i It is the rated power of each refrigerator, which indicates the power consumption or cooling capacity of the refrigerator under standard operating conditions;

[0026] Q is the cooling water flow rate;

[0027] COP i is the energy efficiency ratio of each refrigerator, which indicates the efficiency of the refrigerator in converting electrical energy into cooling capacity;

[0028] Indicates the total cooling capacity of all refrigerators;

[0029] N total is the total number of chillers in the system.

[0030] In a preferred embodiment of the present invention,

[0031] S1. Detect cooling water information and send it;

[0032] S2, receiving cooling water information and making a judgment, and sending the judgment information;

[0033] S3, receiving judgment information and replenishing system water or maintaining system water pressure;

[0034] S4, receiving cooling water information, adjusting the number of refrigerators to be opened, and outputting the treated cooling water;

[0035] S5. Detect and send the processed cooling water information.

[0036] In a preferred embodiment of the present invention,

[0037] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0038] (1) The first detection component is set to detect cooling water information. The first detection component sends the cooling water information to the buffer tank and the refrigeration component. The judgment unit compares the temperature information in the cooling water information with the actual temperature. The judgment unit sends the judgment information to the buffer tank and the stop valve. The stop valve is normally opened in the small cycle and completely closed in the large cycle. The first control unit of the buffer tank realizes water replenishment according to the cooling water information; the first detection component can detect various data of the cooling water to judge the load state of the battery. The buffer tank and the stop valve can realize the conversion operation of the large and small cycles after receiving the information of the judgment unit; compared with the existing technology, it can accurately detect the battery load condition and realize the conversion of the large and small cycles according to the load condition, accurately realize the battery cooling effect, improve efficiency, and can better adjust the opening number of the refrigeration components, reduce the waste of cooling resources, and reduce the operating cost.

[0039] (2) A refrigeration component is provided, and a controller is used on the refrigeration component to control the number of refrigerators that are turned on. The controller controls the number of refrigerators that are turned on. Compared with the prior art, the number of refrigerators that are turned on in the refrigeration component can be adjusted according to the battery load conditions, and the regulation is more precise. At the same time, the refrigeration effect of the refrigeration component can be saved. The number of refrigerators can be adjusted in different modes to achieve the cooling water treatment effect. The adjustment is more precise and saves energy of the refrigeration component.

[0040] (3) By setting a first control unit and controlling the amount of water added to the buffer tank, compared with the prior art, the amount of water in the system can be adjusted in different modes to achieve the effect of adding water and maintaining water pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 is a flow chart of a preferred embodiment of the present invention;

[0043] Figure 2 is a flow chart of a first detection component of the present invention;

[0044] Figure 3 is a flow chart of the refrigeration assembly of the present invention;

[0045] Figure 4 is a flow chart of the refrigeration component and the first detection component of the present invention;

[0046] 1. Water-cooled valve chamber; 2. First channel; 21. First detection component; 3. Degassing tank; 4. Second channel; 41. Pump body component; 5. Refrigeration component; 6. Third channel; 61. Second detection component; 7. Fourth channel; 71. Stop valve; 72. Check valve; 8. Fifth channel; 9. Sixth channel; 10. Ion exchanger; 11. Buffer tank; 12. Water replenishment tank. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0051] like Figure 1 As shown, a water cooling circulation system and control method for a battery pack in an energy storage container include: a water cooling valve chamber 1, a first channel 2 connected to the output end of the water cooling valve chamber 1, a degassing tank 3 connected to the first channel 2, a second channel 4 connected to the output end of the degassing tank 3, a refrigeration component 5 connected to the second channel 4, and a third channel 6 connected to the output end of the refrigeration component 5; the third channel 6 is connected to the input end of the water cooling valve chamber 1, a water replenishment device is provided between the third channel 6 and the degassing tank 3, the second channel 4 is provided with a pump body component 41, the output end of the water cooling valve chamber 1 is provided with a first detection component 21, and the input end of the water cooling valve chamber 1 is provided with a second detection component 61; the refrigeration component 5 is used to cool cooling water.

[0052] Specifically, the degassing tank 3 is used to remove gas components in the cooling water. At the same time, the water supplemented by the water supplement device will first flow to the degassing tank 3 and then be output to the second channel 4 through the degassing tank 3.

[0053] Furthermore, the water replenishment device includes: a fourth channel 7 connected to the third channel 6, an ion exchanger 10 and a water replenishment tank 12 connected to the tail of the fourth channel 7, a fifth channel 8 connected to the ion exchanger 10, a buffer tank 11 connected to the fifth channel 8, and a sixth channel 9 connected to the buffer tank 11; the sixth channel 9 is connected to the degassing tank 3; a check valve 72 and a stop valve 71 are provided in the middle of the fourth channel 7; the stop valve 71 is connected to the judgment unit.

[0054] Specifically, the ion exchanger 10 is a device for removing ions (such as calcium, magnesium, chlorine, etc.) and certain dissolved solids in water. It usually contains one or more ion exchange resins that can exchange ions with the water to purify the water and protect subsequent equipment and systems from water quality problems.

[0055] Specifically, the water replenishment tank 12 is a container for storing cooling water, which is used to replenish water to the system. It usually has sufficient capacity to ensure that sufficient cooling water can be provided when the system needs it. The water replenishment tank 12 can replenish the total amount of cooling water. The water in the water replenishment tank 12 flows into the ion exchanger 10 through the fourth channel 7 and finally reaches the buffer tank 11.

[0056] More specifically, the check valve 72 here can be divided into various types according to its different structural forms, such as a swing check valve 72, a lift check valve 72, a butterfly check valve 72, etc. The flow direction of cooling water in the check valve 72 in the present application is in the fourth channel 7, flowing from the third channel 6 to the ion exchanger 10.

[0057] More specifically, the check valve 72 is provided in the middle of the fourth channel 7, and the water added by the water supply tank 12 does not flow to the third channel 6; at the same time, in the small circulation mode, a part of the water flow of the cooling assembly passes through the check valve 72 and flows into the ion exchanger 10 through the fourth channel 7, and finally reaches the buffer tank 11;

[0058] Specifically, a switch component is provided on the stop valve 71, and the switch component can control the switch of the stop valve 71, and the switch component is electrically connected to the first control unit.

[0059] Further, such as Figure 2 As shown, the first detection component 21 includes a temperature sensor, a flow sensor, a pressure sensor and a judgment unit connected to the temperature sensor; the temperature sensor is used to detect temperature information and send it, the judgment unit is used to receive the temperature information and compare it with the warning temperature and send it, and the judgment unit is connected to the buffer tank 11 and the stop valve 71;

[0060] Specifically, the first detection component 21 is used to detect the temperature, flow rate, pressure and other values ​​of the cooling water flowing out of the water-cooled valve chamber 1, and send the detected cooling water information to the judgment unit. The judgment unit sends the judgment information to the buffer tank 11 by comparing the temperature information with the warning temperature. The judgment unit plays a role in judging whether it is a large circulation mode or a small circulation mode. The buffer tank 11 adjusts its water supply method according to the judgment information, that is, replenishes water or maintains water pressure.

[0061] Further, the buffer tank 11 includes a tank body and a first control unit installed on the tank body; the tank body is connected to the sixth channel 9 and the fifth channel 8, the first control unit is connected to the judgment unit; the first control unit is connected to the first detection component 21;

[0062] Specifically, the first control unit receives the judgment information, controls the buffer tank 11, and adjusts the water replenishment amount according to the result of the judgment unit.

[0063] Specifically, the cooling water of the ion exchanger 10 flows to the buffer tank 11 through the fifth channel 8, and the buffer tank 11 outputs to the sixth channel 9 and flows into the degassing tank 3; the first control unit can receive the judgment information, thereby controlling the water output of the tank body to achieve different water replenishment effects.

[0064] More specifically, a water level sensor is also provided in the tank body, and the water amount in the tank body is monitored by the water level sensor. Because the water replenishment tank 12 will replenish the water amount in the buffer tank 11 and monitor the water amount, after the water level sensor detects that the water amount is sufficient, the operator can stop the water adding operation of the water replenishment tank 12.

[0065] Furthermore, when the temperature information is greater than the warning temperature, the large circulation mode is turned on, and the buffer tank 11 is used to maintain the water pressure in the system;

[0066] Specifically, when the first detection component 21 detects that the temperature information is greater than the warning temperature, the large circulation mode is turned on, and the water in the water-cooled valve chamber 1 flows to the degassing tank 3, and then flows to the refrigeration component 5 through the degassing tank 3, and then flows into the water-cooled valve chamber 1 after passing through the refrigeration component 5; the buffer tank 11 receives the cooling water information of the first detection component 21, and according to the pressure sensor, water is introduced into the degassing tank 3 to maintain the water pressure in the system.

[0067] When in the large cycle, the judgment unit sends judgment information to the stop valve 71, the stop valve 71 is completely closed, the water flow of the cooling component does not flow into the fourth channel 7, and the water flow output by the refrigeration component 5 directly passes through the third channel 6 and finally flows into the water-cooled valve chamber 1.

[0068] In the large cycle, when the system water pressure is lower than a certain set value P min When the water pressure is too high, it is necessary to start the water replenishment operation to restore the water pressure. large It can be calculated based on how much the water pressure falls below the set value as follows:

[0069] Q large =k p ·(P min -P),

[0070] Where: P is the current system water pressure.

[0071] P min It is the set lower limit of water pressure.

[0072] k p It is the water pressure adjustment coefficient, which is used to quantify the influence of water pressure on water replenishment. This coefficient also needs to be determined based on system characteristics and experimental data.

[0073] Note that if P ≥ P min , then Q large =0, no water replenishment is needed.

[0074] Furthermore, when the temperature information is lower than the warning temperature, the small circulation mode is turned on, and the buffer tank 11 is used to replenish the water in the system;

[0075] Specifically, when the first detection component 21 detects that the temperature information is lower than the warning temperature, the small circulation mode is turned on, and the water in the water-cooled valve chamber 1 flows to the degassing tank 3, and then flows to the refrigeration component 5 through the degassing tank 3. Part of the water output by the refrigeration component 5 flows into the water-cooled valve chamber 1, and part of the water also flows into the ion exchanger 10 through the third channel 6 and the fourth channel 7, and finally reaches the buffer tank 11; the buffer tank 11 introduces water into the degassing tank 3 to replenish the water volume to realize a small circulation.

[0076] In the small cycle, assuming that when the cooling water temperature exceeds a certain set value T max When the temperature drops, water replenishment needs to be started to lower the temperature. small The degree to which the temperature exceeds the set value can be calculated:

[0077] Q small =k T ·(TT max ),

[0078] Where T is the current cooling water temperature.

[0079] T max is the set upper temperature limit.

[0080] k T It is the temperature adjustment coefficient, which is used to quantify the degree of influence of temperature on the replenishment amount. This coefficient needs to be determined based on system characteristics and experimental data.

[0081] Note that if T ≤ T max , then Q small =0, no water replenishment is needed.

[0082] More specifically, it is worth noting that the adjustment factor k T and k p The value of is obtained through data analysis;

[0083] During the normal operation and water replenishment operation of the system, a large amount of water pressure, temperature, flow and corresponding water replenishment volume data are collected, and then according to the formula;

[0084] Q=k T T1+k p P1

[0085] Among them, Q is the amount of water replenishment.

[0086] T1 is the temperature.

[0087] P1 is the water pressure.

[0088] According to the specific data set and formula, the adjustment coefficient k is finally obtained T and k p The value of .

[0089] Furthermore, the warning temperature is 35°C; specifically, the optimal operating temperature range of energy storage batteries (especially lithium-ion batteries) is generally between 10°C and 35°C. Within this temperature range, the battery can maintain its optimal use state and ensure the performance and life of the energy storage system. Within this temperature range, the battery can maintain the normal chemical reactions inside the battery and reduce the occurrence of harmful side reactions; maintain the stability of the battery capacity and avoid a significant decrease in battery capacity due to excessively high or low temperatures; extend the cycle life of the battery and reduce battery aging due to improper temperature;

[0090] Therefore, the warning temperature is set to 35°C. When the temperature exceeds the warning temperature, the rate of internal harmful chemical reactions will increase, accelerating harmful chemical reactions inside the battery, such as electrolyte decomposition and positive electrode material deactivation. It will also cause battery life to decrease, as well as reduced safety, which can easily lead to safety problems such as short circuit, overcharge, over discharge, and may even cause explosion or fire.

[0091] Furthermore, the second detection component 61 includes a second temperature sensor, a second flow sensor, and a display unit connected to the second temperature sensor and the second flow sensor;

[0092] Specifically, the second detection component 61 detects the temperature data and flow data that ultimately flows to the water-cooled valve chamber 1, and sends the data to the display unit, which sends the data to the operator. The operator can observe the refrigeration effect based on the temperature data and flow data and perform maintenance on the refrigeration equipment in a timely manner.

[0093] Further, the pump assembly 41 includes a first pump body, a second pump body and a third pump body connected in parallel with the first pump body, and a second control unit connected with the first pump body, the second pump body and the third pump body; the second control unit is connected to the judgment unit;

[0094] Specifically, the second control unit connected to the judgment unit can realize the control of the pump body under the large cycle or the small cycle after receiving the judgment information. When in normal working mode or the small cycle mode, only the first pump body is turned on. When in the large cycle mode, the second pump body connected in parallel with the first pump body is turned on to change the cooling water flow rate, which can further improve the cooling effect.

[0095] The third pump body is used to start when the first pump body and the second pump body fail, so as to reduce the impact of the decline in refrigeration effect caused by the failure.

[0096] Further, such as Figure 3As shown, the refrigeration component 5 includes: a number of refrigerators arranged in parallel, and a controller connected to the several refrigerators; the controller is connected to the temperature sensor and the flow sensor, and the controller is used to adjust the number of refrigerators that are turned on; specifically, the controller can adjust the number of refrigerators based on the received temperature and flow data.

[0097] Specifically, the controller adjusts the number of refrigerators turned on:

[0098]

[0099] N required is the number of refrigerators required;

[0100] m is the mass flow rate of cooling water;

[0101] c p is the specific heat capacity of cooling water;

[0102] ΔT is the current cooling water temperature T current With the target temperature T target The difference between

[0103] β is the weight factor of cooling water flow, which is used to adjust the influence of cooling water flow on cooling demand;

[0104] P i It is the rated power of each refrigerator, which indicates the power consumption or cooling capacity of the refrigerator under standard operating conditions;

[0105] Q is the cooling water flow rate;

[0106] COP i is the energy efficiency ratio of each refrigerator, which indicates the efficiency of the refrigerator in converting electrical energy into cooling capacity;

[0107] Indicates the total cooling capacity of all refrigerators;

[0108] N total is the total number of chillers in the system.

[0109] Specifically, in this formula, the target temperature of cooling water is 35°C.

[0110] A water cooling cycle control method for battery packs in energy storage containers:

[0111] S1. Detect cooling water information and send it;

[0112] S2, receiving cooling water information and making a judgment, and sending the judgment information;

[0113] S3, receiving judgment information and replenishing system water or maintaining system water pressure;

[0114] S4, receiving cooling water information, adjusting the number of refrigerators to be opened, and outputting the treated cooling water;

[0115] S5. Detect and send the processed cooling water information.

[0116] Specifically, S1, detecting cooling water information and sending it;

[0117] First, the entire water cooling circulation system is started, including the pump assembly 41 and the refrigeration assembly 5 .

[0118] The temperature, flow rate and pressure information of the cooling water at the output end of the water-cooling valve chamber 1 are detected in real time by the temperature sensor, flow rate sensor and pressure sensor in the first detection component 21 .

[0119] This information is sent to the judgment unit in the first detection component 21 for processing.

[0120] S2, receiving cooling water information and making a judgment, and sending the judgment information;

[0121] The determination unit receives the temperature information from the first detection component 21 and compares it with a preset warning temperature such as 35° C.

[0122] If the temperature information is greater than the warning temperature, such as 35° C., the judgment unit sends a signal to start the large circulation mode, and simultaneously sends a control signal to the buffer tank 11 and the stop valve 71 .

[0123] If the temperature information is less than or equal to the warning temperature, the judgment unit sends a signal to start the small circulation mode and adjusts the working status of the water replenishment device and the pump body assembly 41.

[0124] S3, receiving judgment information and replenishing system water or maintaining system water pressure;

[0125] When the temperature information is greater than the warning temperature, the stop valve 71 is completely closed to prevent untreated cooling water from directly entering the system. Entering the large circulation mode:

[0126] The buffer tank 11 starts to work to maintain the water pressure in the system and ensure the stable operation of the system.

[0127] At this time, the water replenishment device including the water replenishment tank 12 and the ion exchanger 10 is in a standby state and does not directly replenish cooling water.

[0128] When the temperature information is less than or equal to the warning temperature, the stop valve 71 opens normally, allowing cooling water to be replenished through the fourth channel 7. Entering the small circulation mode:

[0129] The water replenishment tank 12 and the ion exchanger 10 in the water replenishment device work to replenish the system with treated cooling water to ensure that the system has sufficient water volume and the water quality meets the requirements.

[0130] S4, receiving cooling water information, adjusting the number of refrigerators to be opened, and outputting the treated cooling water;

[0131] The controller in the refrigeration component 5 calculates and adjusts the opening quantity of the refrigerator according to the information of the temperature sensor and the flow sensor and the preset algorithm as given in the formula.

[0132] The operating status of each refrigerator is adjusted through the controller to achieve the best cooling effect while keeping energy consumption within a reasonable range.

[0133] The cooling water processed by the refrigeration assembly 5 returns to the input end of the water-cooled valve chamber 1 through the third channel 6, forming a closed-loop circulation.

[0134] S5, detecting and sending the processed cooling water information;

[0135] The temperature and flow information of the treated cooling water are detected in real time by the second temperature sensor and the second flow sensor in the second detection component 61 .

[0136] This information is sent to the display unit for display, monitoring and recording by the operator.

[0137] The system continuously performs cyclic monitoring of the above steps to ensure that the battery pack of the energy storage container is always within the appropriate operating temperature range, thereby improving the performance and life of the battery pack.

[0138] When the present invention is used, cooling water flows from the output end of the water-cooled valve chamber 1 into the first channel 2, and the first detection component 21 detects the temperature, water pressure, and flow rate of the cooling water and sends the data to the judgment unit, the buffer tank 11, and the refrigeration component 5;

[0139] After judging, the judging unit sends the judging information to the buffer tank 11 and the stop valve 71, and the stop valve 71 is closed. The buffer tank 11 replenishes water to the degassing tank 3 according to the judging information and the cooling water information, and replenishes water to maintain the water pressure. The cooling water passes through the second channel 4, the refrigeration component 5, and the third channel 6 to reach the water-cooled valve chamber 1;

[0140] After judgment, the judgment unit sends information to the buffer tank 11. The buffer tank 11 replenishes water to the degassing tank 3 according to the judgment information and the cooling water information. The cooling water reaches the refrigeration component 5 through the second channel 4. A part of the cooling water output by the refrigeration component 5 flows directly to the water-cooled valve chamber 1 through the third channel 6, and the other part flows to the fourth channel 7 and finally reaches the buffer tank 11.

[0141] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A water cooling circulation system for a battery pack in an energy storage container, characterized in that: include: A water-cooled valve chamber (1), a first channel (2) connected to an output end of the water-cooled valve chamber (1), a degassing tank (3) connected to the first channel (2), a second channel (4) connected to an output end of the degassing tank (3), a refrigeration component (5) connected to the second channel (4), and a third channel (6) connected to an output end of the refrigeration component (5); the third channel (6) is connected to an input end of the water-cooled valve chamber (1), a water replenishing device is provided between the third channel (6) and the degassing tank (3), the second channel (4) is provided with a pump body component (41), the output end of the water-cooled valve chamber (1) is provided with a first detection component (21), and the input end of the water-cooled valve chamber (1) is provided with a second detection component (61); the refrigeration component (5) is used to cool cooling water; The water replenishment device comprises: a fourth channel (7) connected to the third channel (6), an ion exchanger (10) and a water replenishment tank (12) connected to the tail of the fourth channel (7), a fifth channel (8) connected to the ion exchanger (10), a buffer tank (11) connected to the fifth channel (8), and a sixth channel (9) connected to the buffer tank (11); the sixth channel (9) is connected to the degassing tank (3); a check valve (72) and a stop valve (71) are provided in the middle of the fourth channel (7); The first detection component (21) comprises a temperature sensor, a flow sensor, a pressure sensor and a judgment unit connected to the temperature sensor; the temperature sensor is used to detect temperature information and send it, the judgment unit is used to receive the temperature information and compare it with the warning temperature and send judgment information, and the judgment unit is connected to the buffer tank (11) and the stop valve (71).

2. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: The buffer tank (11) comprises a tank body and a first control unit installed on the tank body; the tank body is connected to the sixth channel (9) and the fifth channel (8), the first control unit is connected to the judgment unit; the first control unit is connected to the first detection component (21).

3. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: When the temperature information is greater than the warning temperature, the large circulation mode is turned on, the buffer tank (11) is used to maintain the water pressure in the system, and the stop valve (71) is completely closed.

4. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: When the temperature information is lower than the warning temperature, the small circulation mode is turned on, the buffer tank (11) is used to replenish the water in the system, and the stop valve (71) is opened normally.

5. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: The warning temperature is 35°C.

6. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: The second detection component (61) comprises a second temperature sensor, a second flow sensor and a display unit connected to the second temperature sensor and the second flow sensor.

7. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: The pump body assembly (41) comprises a first pump body, a second pump body and a third pump body connected in parallel with the first pump body, and a second control unit connected with the first pump body, the second pump body and the third pump body; the second control unit is connected to the judgment unit.

8. The water cooling circulation system for battery packs in an energy storage container according to claim 1, characterized in that: The refrigeration assembly (5) comprises: a plurality of refrigerators arranged in parallel, and a controller connected to the plurality of refrigerators; the controller is connected to the temperature sensor and the flow sensor, and the controller is used to adjust the number of refrigerators that are turned on.

9. The water cooling circulation system for battery packs in an energy storage container according to claim 8, characterized in that: The controller adjusts the number of refrigerators turned on: N required is the number of refrigerators required; m is the mass flow rate of cooling water; c p is the specific heat capacity of cooling water; ΔT is the current cooling water temperature T current With the target temperature T target The difference between β is the weight factor of cooling water flow, which is used to adjust the influence of cooling water flow on cooling demand; P i is the rated power of each refrigerator, indicating the power consumption or cooling capacity of the refrigerator under standard working conditions; Q is the flow rate of cooling water; COP i is the energy efficiency ratio of each refrigerator, which indicates the efficiency of the refrigerator in converting electrical energy into cooling capacity; Indicates the total cooling capacity of all refrigerators; N total is the total number of chillers in the system.

10. A method for controlling water cooling circulation of a battery pack in an energy storage container, based on a water cooling circulation system for a battery pack in an energy storage container according to any one of claims 1 to 9, characterized in that: include: S1. Detect cooling water information and send it; S2, receiving cooling water information and making a judgment, and sending the judgment information; S3, receiving judgment information and replenishing system water or maintaining system water pressure; S4, receiving cooling water information, adjusting the number of refrigerators to be opened, and outputting the treated cooling water; S5. Detect and send the processed cooling water information.

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