Energy storage container with waste heat utilization function

Abstract

The utility model relates to a kind of energy storage container with waste heat utilization function and waste heat utilization method, by setting up cold water tank, hot water tank, when the water temperature of cooling system exceeds set value, hot water is collected using hot water tank and is stored in heat preservation, then using cold water tank to supplement cooling water to cooling system makes the water temperature of cooling system in normal range, when battery compartment temperature reduces under outside temperature, battery pack temperature is lower than optimum working temperature, hot water is supplemented to cooling system by hot water tank, improve the water temperature of cooling system to make battery pack, so that battery pack keeps optimum working temperature range in low temperature environment, improve the working efficiency of battery pack, avoid the energy waste caused by using air conditioner heating.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage container technology, specifically relating to an energy storage container with waste heat utilization function. Background Technology

[0002] With the continuous development of green energy, energy storage equipment, as an energy buffer, has also ushered in a period of rapid development. As an energy storage device with large capacity, convenient transportation, and stable structure, energy storage containers are also favored by a large number of energy storage users. At present, there are many relevant documents on energy storage containers, and the research and development directions are diverse, generally including three major directions: structural design, fire protection design, and temperature control design. In terms of temperature control design, water cooling and air cooling are mainly used to control the temperature, mainly to reduce the operating temperature of the battery pack and prevent the battery pack from thermal runaway and causing fire and explosion. However, there are few design solutions to cope with the cold environment in the north and the high temperature difference environment in the northwest. Especially in the northwest region, the land is vast and sparsely populated, with abundant sunshine resources, which is highly suitable for the installation of green power stations and energy storage containers. However, due to the large temperature difference between day and night, electricity is needed to cool the battery pack during the day. At night, the ambient temperature drops, causing the battery pack to operate below the optimal state, resulting in reduced battery efficiency and failure to perform at its best. The most common solution for ordinary technicians in this field is to use air conditioning for heating, but this increases electricity consumption, reduces the power generation efficiency of the entire power station, increases equipment investment, and affects the economic efficiency of the power station. Utility Model Content

[0003] The primary technical problem to be solved by this invention is to provide an energy storage container with waste heat utilization capabilities, thereby addressing the issues of increased energy consumption and reduced power generation efficiency of traditional energy storage containers when operating in low-temperature environments.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an energy storage container with waste heat utilization function, including a container body, wherein the container body is divided into an independent electrical compartment and a battery compartment by a partition. The electrical compartment is used to install battery management equipment, and the battery compartment is used to install battery packs. A cold water tank and a hot water tank are installed on the top of the container body. The outer wall of the hot water tank is provided with a heat insulation layer. A water cooling system is installed in the battery compartment. The inlet and outlet of the water cooling system are connected to each other through a circulation pipeline. A circulation pump that drives the cooling water to flow in one direction is installed on the circulation pipeline. The cold water tank is cooled by a water cooling system. A water branch pipe and a first three-way solenoid valve are connected to the circulation pipeline. The hot water tank is connected to the circulation pipeline via a hot water branch pipe and a second three-way solenoid valve. The hot water tank is also connected to the circulation pipeline downstream of the first three-way solenoid valve via a water supply pipe and a water supply solenoid valve. The water cooling system is equipped with a temperature sensor for detecting the system water temperature. The temperature sensor, the first three-way solenoid valve, the second three-way solenoid valve, and the water supply solenoid valve are electrically connected to the controller. The temperature sensor sends the detected temperature information to the controller, and the controller controls the switching of the first three-way solenoid valve and the second three-way solenoid valve based on the detection result of the temperature sensor.

[0005] As a preferred embodiment, a first radiator is also provided on the circulation pipeline, through which the cooling water dissipates heat. The first radiator is located downstream of the hot water tank.

[0006] As a preferred embodiment, the water inlet of the first radiator is connected to a short-circuit pipe via a third three-way solenoid valve. The short-circuit pipe extends to the water outlet of the first radiator and is connected to the water outlet of the first radiator via a fourth three-way solenoid valve. The third and fourth three-way solenoid valves are electrically connected to the controller.

[0007] As a preferred embodiment, the first radiator is connected to the outside of one side wall of the housing.

[0008] As a preferred embodiment, an overflow pipe is connected to the upper side wall of the hot water tank, and the other end of the overflow pipe is connected to the cold water tank. The overflow pipe is set at an angle, with the end connected to the hot water tank higher than the end connected to the cold water tank. A second radiator is connected to the overflow pipe and is set on the outer side wall of the tank. An overflow solenoid valve is set at the end of the overflow pipe located in the hot water tank. A liquid level sensor is set inside the hot water tank. The liquid level sensor and the overflow solenoid valve are electrically connected to the controller. When the liquid level in the hot water tank exceeds the set value, the overflow solenoid valve opens and the excess hot water is cooled through the second radiator and then flows back to the cold water tank.

[0009] The beneficial effects of this utility model are as follows: By setting up a cold water tank and a hot water tank, when the water temperature of the cooling system exceeds the set value, the hot water tank collects and stores hot water at a constant temperature. Then, the cold water tank replenishes the cooling system with cooling water to keep the water temperature of the cooling system within the normal range. When the ambient temperature drops, causing the battery compartment temperature to decrease and the battery pack temperature to fall below the optimal operating temperature, the hot water tank replenishes the cooling system with hot water to raise the water temperature of the cooling system and thus feed back into the battery pack. This allows the battery pack to maintain its optimal operating temperature range in low-temperature environments, improves the working efficiency of the battery pack, and avoids energy waste caused by using air conditioning for heating. Attached Figure Description

[0010] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the frame structure of the energy storage container described in this utility model; Figure 2 This is a schematic diagram of the cooling water circuit working principle of the energy storage container described in this novel invention; Figure 1 and Figure 2 Components: 1. Cabinet; 2. Partition; 3. Electrical compartment; 4. Battery compartment; 5. Cold water tank; 6. Hot water tank; 7. Insulation layer; 8. Water cooling system; 9. Circulation pipeline; 10. Circulation pump; 11. Cold water branch pipe; 12. First three-way solenoid valve; 13. Hot water branch pipe; 14. Second three-way solenoid valve; 15. Temperature sensor; 16. Controller; 17. First radiator; 18. Third three-way solenoid valve; 19. Short-circuit pipe; 20. Fourth three-way solenoid valve; 21. Overflow pipe; 22. Second radiator; 23. Overflow solenoid valve; 24. Liquid level sensor; 25. Water supply pipe; 26. Water supply solenoid valve. Detailed Implementation

[0011] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.

[0012] like Figure 1 and Figure 2The energy storage container with waste heat utilization function shown includes a container body 1. The container body 1 is divided into an independent electrical compartment 3 and a battery compartment 4 by a partition 2. The electrical compartment 3 is used to install battery management equipment, and the battery compartment 4 is used to install battery packs. A cold water tank 5 and a hot water tank 6 are installed on the top of the container body 1. The outer wall of the hot water tank 6 is provided with a heat insulation layer 7. A water cooling system 8 is installed in the battery compartment 4. The inlet and outlet of the water cooling system 8 are connected to each other through a circulation pipe 9. A circulation pump 10 is installed on the circulation pipe 9 to drive the cooling water to flow in one direction. The cold water tank 5 is connected to the circulation pipe 9 through a cold water branch pipe 11 and a first three-way solenoid valve 12. The hot water tank 6 is connected to the circulation pipeline 9 via a hot water branch pipe 13 and a second three-way solenoid valve 14. The hot water tank 6 is also connected to the circulation pipeline 9 downstream of the first three-way solenoid valve 12 via a water supply pipe 25 and a water supply solenoid valve 26. The water cooling system 8 is equipped with a temperature sensor 15 for detecting the system water temperature. The temperature sensor 15, the first three-way solenoid valve 12, the second three-way solenoid valve 14, and the water supply solenoid valve 26 are electrically connected to the controller 16. The temperature sensor 15 sends the detected temperature information to the controller 16. The controller 16 controls the switching of the first three-way solenoid valve 12 and the second three-way solenoid valve 14 based on the detection result of the temperature sensor 15.

[0013] In order to avoid Figure 1 The lines are too messy; the accompanying diagram in the instruction manual is incorrect. Figure 1 Only a portion of the components are shown as examples; the locations of some pipes and valves can be determined based on... Figure 2 The connection relationships shown are laid out according to the specific spatial location inside the box 1, which will not prevent those skilled in the art from implementing this technical solution.

[0014] Although this embodiment only provides simple insulation layer 7 for the hot water tank 6, in practical applications, a double-layered insulated water tank with a vacuum insulation layer can be used to improve the insulation effect of the hot water tank 6. Since such insulated water tanks have a conventional structure, they will not be described in this embodiment.

[0015] A first radiator 17 is also installed on the circulation pipeline. Cooling water is cooled through the first radiator 17, which is located downstream of the hot water tank 6. The radiator 17 can dissipate heat from the cooling water during the circulation process to reduce the overall water temperature of the water cooling system, thereby maintaining the water temperature of the water cooling system at a reasonable level and achieving temperature control capability for the battery pack.

[0016] The water inlet of the first radiator 17 is connected to a short-circuit pipe 19 via a third three-way solenoid valve 18. The short-circuit pipe 19 extends to the water outlet of the first radiator 17 and is connected to the water outlet of the first radiator 17 via a fourth three-way solenoid valve 20. The third three-way solenoid valve 18 and the fourth three-way solenoid valve 20 are electrically connected to the controller 16. The circulation pipe 9 is connected to the first radiator 17 via the third three-way solenoid valve 18 and the fourth three-way solenoid valve 20.

[0017] The first radiator 17 is used when the water temperature in the water cooling system is rising, and short-circuited when the water temperature in the water cooling system is falling, so as to improve the ability to regulate the water temperature of the water cooling system.

[0018] The first radiator 17 is connected to the outside of one side wall of the housing 1.

[0019] In this embodiment, an overflow pipe 21 is preferably connected to the upper side wall of the hot water tank 6. The other end of the overflow pipe 21 is connected to the cold water tank 5. The overflow pipe 21 is inclined and the end connected to the hot water tank 6 is higher than the end connected to the cold water tank 5. A second radiator 22 is connected to the overflow pipe 21 and is located on the outer side wall of the tank body 1. An overflow solenoid valve 23 is provided at one end of the overflow pipe 21 in the hot water tank 6. A liquid level sensor 24 is provided in the hot water tank 6. The liquid level sensor 24 and the overflow solenoid valve 23 are electrically connected to the controller 16. When the liquid level in the hot water tank 6 exceeds the set value, the overflow solenoid valve 23 opens and the excess hot water is cooled through the second radiator 22 and then flows back to the cold water tank 5.

[0020] The waste heat utilization method of the energy storage container described in this embodiment includes the following specific steps: S1. First, inject cooling water into the cold water tank 5, the water cooling system 8, and the circulation pipe 9. Close one end of the first three-way solenoid valve 12 (cold water tank 5) and the second three-way solenoid valve 14 (hot water tank 6). At this time, the first three-way solenoid valve 12 and the second three-way solenoid valve 14 are in the circulation state. Simultaneously, close the water supply solenoid valve 26. Start the circulation pump 10 to drive the cooling water along... Figure 2 The counter-clockwise rotation shown in the diagram controls the temperature of the battery pack inside battery compartment 4.

[0021] S2. Temperature sensor 15 monitors the temperature of the circulating cooling water in the water-cooling system 8. When the water temperature in the water-cooling system 8 exceeds the upper limit, controller 16 simultaneously controls the first three-way solenoid valve 12 and the second three-way solenoid valve 14 to switch their conduction states to cooling and water replenishment states, i.e.: The first three-way solenoid valve 12 is switched to a state where the cold water tank 5 is connected to the downstream circulation pipeline 9; The conduction relationship of the second three-way solenoid valve 14 is switched to the state where the hot water tank 6 is connected to the upstream circulation pipe 9; At this time, the cold water tank 5 replenishes the water cooling system 8 with low-temperature cooling water, and the high-temperature cooling water is pumped into the hot water tank 6 for heat preservation. When the temperature sensor 15 detects that the water temperature of the water cooling system 8 has dropped below the upper limit value, the controller 16 controls the first three-way solenoid valve 12 and the second three-way solenoid valve 14 to reset to the cycle state of step S1. When the water temperature in the water cooling system 8 is lower than the lower limit temperature, the controller 16 simultaneously controls the first three-way solenoid valve 12 and the water replenishment solenoid valve 26 to switch to the heating and water replenishment state, that is: The first three-way solenoid valve 12 is switched to a state where the cold water tank 5 is connected to the upstream circulation pipeline 9; Water supply solenoid valve 26 is opened; At this time, the hot water tank 6 replenishes hot water to the circulation pipe 9 and the water cooling system 8. The original cold water in the circulation pipe 9 flows back into the cold water tank 5 for storage through the first three-way solenoid valve 12. When the water temperature detected by the temperature sensor 15 rises above the lower limit value, the controller 16 controls the first three-way solenoid valve 12 to reset to the circulation state and closes the water replenishment solenoid valve 26 at the same time.

[0022] This control method enables energy storage containers to adapt to harsh environments such as deserts and mountainsides, where there is abundant sunlight during the day and extremely cold temperatures at night.

[0023] When the level sensor 24 detects that the liquid level in the hot water tank 6 exceeds the preset value, the controller 16 opens the overflow solenoid valve 23, and the hot water in the hot water tank 6 flows through the overflow pipe 21 through the second radiator 22, and after being cooled, flows into the cold water tank 5 for storage.

[0024] In practical applications, the appropriate volume of the hot water tank can be set according to the local environment to deal with the problem of hot water tank 6 overflowing.

[0025] As a preferred embodiment, in step S2, when the water temperature of the water-cooling system 8 decreases linearly, the controller 16 controls the third three-way solenoid valve 18 and the fourth three-way solenoid valve 20 to short-circuit the first radiator 17. Specifically, the connection relationship is such that the end of the third three-way solenoid valve 18 connected to the first radiator 17 is closed, while the other two ends are open. The end of the fourth three-way solenoid valve 20 connected to the first radiator 17 is closed, while the other two ends are open.

[0026] When the water temperature in the water cooling system 8 increases linearly during circulation, the controller 16 controls the third three-way solenoid valve 18 and the fourth three-way solenoid valve 20 to short-circuit the short-circuit pipe 19. Specifically, the connection between the third three-way solenoid valve 18 and the short-circuit pipe 19 is closed, while the other two ends are open. Similarly, the connection between the fourth three-way solenoid valve 20 and the short-circuit pipe 19 is closed, while the other two ends are open.

[0027] In step S1, the specific control method for injecting cooling water into the water-cooling system 8 and the circulation pipe 9 is as follows: First, the controller 16 switches the conduction relationship of the second three-way solenoid valve 14 to the state where the hot water tank 6 is connected to its upstream circulation pipe 9, and switches the conduction relationship of the first three-way solenoid valve 12 to the state where the cold water tank 5 is connected to its downstream circulation pipe 9. Then, the circulation pump 10 is started, and the cold water tank 5 injects cooling water into the water-cooling system 8 and the circulation pipe 9. The cumulative flow rate of the circulation pump 10 is controlled to be greater than that of the cooling system 8 and the circulation pipe 9. At 5%~10% of the total water storage capacity, the circulation pipe 9 between the cold water tank 5 and the hot water tank 6 is empty, while some cooling water enters the hot water tank 6. Then, the conduction relationship of the second three-way solenoid valve 14 is switched to connect the hot water tank 6 with its downstream circulation pipe 9. At this time, the cooling water in the hot water tank 6 flows into its downstream circulation pipe 9 until the downstream circulation pipe 9 of the hot water tank 6 is full of cooling water. Then, the controller 16 switches the first three-way solenoid valve 12 and the second three-way solenoid valve 14 to the circulation state at the same time.

[0028] The method to determine whether the downstream circulation pipe 9 of the hot water tank 6 is full of cooling water is to use the liquid level sensor 24 to detect the drop in the water level in the hot water tank 6. When the liquid level no longer drops, it means that the downstream circulation pipe 9 of the hot water tank 6 is full of cooling water.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. An energy storage container with waste heat utilization function, comprising a container body (1), wherein the container body (1) is divided into an independent electrical compartment (3) and a battery compartment (4) by a partition (2), the electrical compartment (3) being used to install battery management equipment, and the battery compartment (4) being used to install battery packs, characterized in that, The top of the housing (1) is provided with a cold water tank (5) and a hot water tank (6). The outer wall of the hot water tank (6) is provided with an insulation layer (7). The battery compartment (4) is provided with a water cooling system (8). The inlet and outlet of the water cooling system (8) are connected to each other through a circulation pipe (9). A circulation pump (10) that drives the cooling water to flow in one direction is provided on the circulation pipe (9). The cold water tank (5) is connected to the circulation pipe (9) through a cold water branch pipe (11) and a first three-way solenoid valve (12). The hot water tank (6) is connected to the circulation pipe (9) through a hot water branch pipe (13) and a second three-way solenoid valve (14). (6) It is also connected to the downstream circulation pipeline (9) of the first three-way solenoid valve (12) through a water supply pipe (25) and a water supply solenoid valve (26). The water cooling system (8) is equipped with a temperature sensor (15) for detecting the system water temperature. The temperature sensor (15), the first three-way solenoid valve (12), the second three-way solenoid valve (14), and the water supply solenoid valve (26) are electrically connected to the controller (16). The temperature sensor (15) sends the detected temperature information to the controller (16). The controller (16) controls the switching of the first three-way solenoid valve (12) and the second three-way solenoid valve (14) according to the detection result of the temperature sensor (15).

2. The energy storage container with waste heat utilization function according to claim 1, characterized in that, The circulation pipeline is also equipped with a first radiator (17), through which cooling water is dissipated. The first radiator (17) is located downstream of the hot water tank (6).

3. The energy storage container with waste heat utilization function according to claim 2, characterized in that, The water inlet of the first radiator (17) is connected to a short-circuit pipe (19) through a third three-way solenoid valve (18). The short-circuit pipe (19) extends to the water outlet of the first radiator (17) and is connected to the water outlet of the first radiator (17) through a fourth three-way solenoid valve (20). The third three-way solenoid valve (18) and the fourth three-way solenoid valve (20) are electrically connected to the controller (16) respectively.

4. The energy storage container with waste heat utilization function according to claim 2, characterized in that, The first radiator (17) is connected to the outside of one side wall of the housing (1).

5. The energy storage container with waste heat utilization function according to claim 1, characterized in that, An overflow pipe (21) is connected to the upper side wall of the hot water tank (6). The other end of the overflow pipe (21) is connected to the cold water tank (5). The overflow pipe (21) is set at an angle and the end connected to the hot water tank (6) is higher than the end connected to the cold water tank (5). A second radiator (22) is connected to the overflow pipe (21). The second radiator (22) is set on the outer side wall of the tank (1). An overflow solenoid valve (23) is set at one end of the overflow pipe (21) in the hot water tank (6). A liquid level sensor (24) is set in the hot water tank (6). The liquid level sensor (24) and the overflow solenoid valve (23) are electrically connected to the controller (16). When the liquid level in the hot water tank (6) exceeds the set value, the overflow solenoid valve (23) opens and the excess hot water is cooled through the second radiator (22) and then flows back to the cold water tank (5).

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