Automatic liquid supplementing type liquid cooling system equipped with high-low position compatible type water tank

Abstract

The invention provides an automatic liquid supplementing type liquid cooling system equipped with a high-low position compatible type water tank, and relates to the technical field of energy storage liquid cooling systems, the system comprises an energy storage battery module, a main circulation pipeline and a water tank; an electromagnetic valve, a one-way valve, a water pump, a plate type heat exchange unit and a pressure sensor are sequentially connected to the main circulating pipeline from liquid inlet to liquid outlet; a water tank branch is connected between the electromagnetic valve and the one-way valve on the main circulating pipeline; a breather valve communicated with the water tank branch and the inner cavity of the water tank is arranged at the bottom of the water tank; the top of the water tank communicates with the atmosphere. The system has the advantages that the water tank in the system is free of maintenance, free of regular gas filling and free of limitation of placement positions under the action of the breather valve at the bottom, the water tank can be placed at a high position or a low position of the system, the structural layout is very flexible, and meanwhile automatic liquid supplementing can be achieved under the cooperation of the electromagnetic valve and the water tank.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage liquid cooling systems, and in particular to an automatic liquid replenishing liquid cooling system equipped with a high-low compatible water tank. Background Art

[0002] Energy storage batteries generate a large amount of heat during the charging and discharging process. As the heat accumulates, the battery temperature continues to rise. To prevent thermal failure or thermal runaway, a thermal management system is required to ensure that the battery temperature remains within an appropriate range. Cold plate liquid cooling is currently the most widely used energy storage thermal management solution. The cold plate liquid cooling system consists of a liquid cooling unit, external piping, and a liquid cooling plate, with the liquid cooling unit being the core unit of the entire liquid cooling system. The coolant in the liquid cooling system expands and contracts with temperature changes. To ensure that the main circulation loop of the liquid cooling system is always filled with coolant and the system pressure is stable, a buffer voltage stabilization unit must be installed in the liquid cooling unit.

[0003] Currently, there are two main types of buffer and voltage-stabilizing units for energy storage liquid cooling units: one is the airbag expansion tank, which is mainly suitable for closed systems; the advantage of the airbag expansion tank is that it is flexible in layout and is not restricted by the placement position. It can be placed at a high position or a low position in the system, but the disadvantage is that it is necessary to regularly add gas to the expansion tank body, and the amount of gas added is difficult to control, because the amount of gas added is different under different ambient temperatures and different liquid cooling system conditions. If the gas filling cycle or gas filling amount is not appropriate, it is very easy to cause the expansion tank to fail. Therefore, the operation and maintenance is difficult and the operation and maintenance cost is high, which has become a pain point in the industry.

[0004] The second is a high-level water tank or expansion tank, which is mainly suitable for open or semi-open systems. The advantage of a high-level water tank or expansion tank is that it is connected to the atmosphere, which can realize automatic pressure adjustment and compensation, and does not require regular refueling and maintenance. However, the disadvantage is that it must be placed at a high position in the system. Since existing water tanks all have breathing valves or waterproof breathable valves installed on the top of the water tank, the gas pressure in the water tank is easily affected by the ambient temperature. When the air pressure in the water tank drops to atmospheric pressure, liquid in the liquid cooling system that is higher than the water tank position will flow into the water tank, causing the main circulation loop of the liquid cooling system to be not full of liquid, affecting cooling efficiency and system reliability. This brings many limitations to the structural layout of the liquid cooling unit.

[0005] As the liquid cooling system operates for extended periods, the remaining air in the system will gradually be exhausted. Furthermore, the coolant itself will dissipate over time, necessitating refilling of the system to ensure that the main circulation loop remains filled with liquid. Currently, most liquid cooling units lack automatic refilling capabilities, requiring maintenance personnel to carry refilling equipment to the site for on-site refilling, which is costly and inconvenient. Alternatively, some liquid cooling units incorporate independent refill pumps and tanks to enable automatic refilling, but this solution significantly increases the cost of the unit and has limited market acceptance. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing liquid cooling system has a high maintenance cost through the air bag expansion tank method, requires regular gas replenishment and maintenance, and cannot achieve automatic liquid replenishment. Although the high-level water tank method does not require gas replenishment and maintenance, the installation layout is limited and the water tank must be placed at a high point in the system. In order to overcome the above defects of the existing technology, the present invention provides a water tank that can be placed at a high position or a low position in the system, fully ensuring the flexibility of the liquid cooling system layout; at the same time, the water tank ensures that the liquid cooling system does not require regular gas replenishment and maintenance, reducing the difficulty and cost of operation and maintenance.

[0007] For the purpose of the present invention, the following technical solutions are adopted: An automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank includes an energy storage battery module, a main circulation pipeline and a water tank; the liquid outlet end of the energy storage battery module is connected to the liquid inlet end of the main circulation pipeline; the liquid inlet end of the energy storage battery module is connected to the liquid outlet end of the main circulation pipeline, and the main circulation pipeline is sequentially connected with a solenoid valve, a one-way valve, a water pump, a plate heat exchange unit and a pressure sensor from the liquid inlet to the liquid outlet; the pressure sensor is used to detect the pressure value of the coolant in the main circulation pipeline in real time, and control the solenoid valve according to the pressure value. The valve is opened and closed; the plate heat exchange unit is used to transfer the cooling capacity to the main circulation pipeline; a liquid injection branch is connected between the one-way valve and the water pump on the main circulation pipeline; a water tank branch is connected between the solenoid valve and the one-way valve on the main circulation pipeline, and the water tank branch is connected to the water tank; a breathing valve connecting the water tank branch and the inner cavity of the water tank is provided at the bottom of the water tank; the top of the water tank is connected to the atmosphere, and the coolant in the water tank is allowed to be injected into the main circulation pipeline or drained into the water tank under the action of the breathing valve. The water tank in this system can be maintenance-free and does not require regular gassing through the action of the bottom breathing valve, and is not restricted by the placement position, whether it is placed at a high or low position in the system. The structural layout is very flexible. At the same time, with the cooperation of the solenoid valve and the water tank, automatic liquid replenishment can be achieved, and the coolant in the water tank is injected into the main circulation loop of the liquid cooling system to ensure that the main circulation loop is always full of liquid.

[0008] Preferably, when the temperature of the coolant in the main circulation pipeline increases, the volume expands and the pressure increases. When the pressure is higher than the exhaust pressure of the breathing valve at the bottom of the water tank, the expanded liquid in the main circulation pipeline will push open the valve on the exhaust side of the breathing valve, and the coolant in the main circulation pipeline will flow into the water tank along the gap. When the temperature of the coolant in the main circulation pipeline decreases or is lost, the volume decreases and the pressure decreases. When the pressure is lower than the suction pressure of the breathing valve at the bottom of the water tank, the liquid in the water tank will push open the valve on the suction side of the breathing valve, and the coolant in the water tank will flow into the main circulation pipeline along the gap to achieve automatic rehydration. Because the top of the water tank is directly connected to the atmosphere, the action of the above-mentioned breathing valve can ensure that the liquid pressure in the main circulation pipeline of the liquid cooling system is always between the suction pressure and the exhaust pressure, thereby eliminating the need to regularly add air to the water tank for maintenance. Moreover, the breathing valve at the bottom prevents the coolant in the main circulation pipeline from flowing back into the water tank due to the pressure generated by its own height difference, so that the water tank can be placed at either a high position or a low position in the system, and the structural layout is very flexible.

[0009] Preferably, the water tank is provided with a scale for measuring the liquid level, and a liquid level switch is also provided at the bottom of the water tank. When the liquid level drops to a certain lower limit, the liquid level switch is triggered to sound an alarm. The scale facilitates the control of the liquid level in the water tank, and when the liquid level drops to a certain lower limit, the liquid level switch is triggered to sound an alarm, reminding the operation and maintenance personnel to add liquid to the water tank.

[0010] Preferably, a top cover is detachably connected to the top of the water tank; a communication hole for communicating with the atmosphere is provided at the bottom of the top cover. The top cover is threaded and can be opened and closed by hand without the need for any tools. Once opened, the water tank can be filled with liquid, which is convenient for operation and convenient for outdoor use. It can effectively prevent foreign matter such as leaves, dust, and rainwater from entering the water tank, thereby ensuring the cleanliness of the coolant in the water tank.

[0011] Preferably, a drain ball valve for draining the coolant is provided at the lower portion of the water tank. The liquid level in the water tank can be conveniently adjusted to a suitable height by opening the drain ball valve, and then the drain ball valve can be closed.

[0012] Preferably, the upper portion of the water tank is provided with an overflow port to prevent the coolant from overflowing from the top, so that the excess liquid after the water tank is filled can be drained into a designated container for collection and storage, thereby avoiding waste of coolant.

[0013] Preferably, an inlet temperature sensor is provided on the main circulation pipeline between the energy storage battery module and the solenoid valve; and an outlet temperature sensor is provided on the main circulation pipeline between the energy storage battery module and the electric heating unit. The inlet and outlet temperature sensors facilitate real-time monitoring of the coolant temperature in the pipeline.

[0014] Preferably, an electric heating unit is provided on the main circulation pipeline between the plate heat exchange unit and the pressure sensor, so as to properly heat the coolant when the temperature is too low.

[0015] Preferably, the liquid injection branch is provided with a liquid injection ball valve for controlling the liquid injection branch switch, so as to facilitate the control of the inflow of the liquid injection branch.

[0016] Preferably, the plate heat exchange unit is also connected to a refrigeration cycle branch; the plate heat exchange unit serves as a bridge between the main circulation pipeline and the refrigeration cycle branch, transferring the cooling energy from the refrigeration cycle branch to the main circulation pipeline; the refrigeration cycle branch is connected in sequence from the liquid inlet to the liquid outlet, with a compressor, a condensing fan, a condenser, and an electronic expansion valve; the liquid inlet of the compressor is connected to the liquid outlet of the plate heat exchange unit, and the liquid outlet of the electronic expansion valve is connected to the liquid inlet of the plate heat exchange unit. The compressor, condensing fan, condenser, and electronic expansion valve on the plate heat exchange unit can further enhance the heat exchange effect.

[0017] To sum up, the advantage of the present invention is that the water tank can be placed at a high position or a low position in the system, which fully guarantees the flexibility of the water tank layout; at the same time, the special structure of the water tank ensures that the liquid cooling system does not need regular gas replenishment and maintenance, reducing the difficulty and cost of operation and maintenance; in addition, the liquid cooling system can automatically replenish fluid and ensure the unidirectional flow of coolant during replenishment, achieving the effect of rapid exhaust, thereby ensuring stable and reliable operation of the liquid cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the liquid cooling unit of the present invention.

[0020] Figure 3 1 is a schematic diagram of the automatic liquid replenishment type liquid cooling system of the present invention.

[0021] Figure 4 It is a structural schematic diagram of a water tank of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the breathing valve of the present invention.

[0023] Description of reference numerals: 1. Energy storage battery module; 2. Main circulation pipeline; 21. Solenoid valve; 22. One-way valve; 23. Water pump; 24. Plate heat exchange unit; 25. Electric heating unit; 26. Liquid inlet temperature sensor; 27. Liquid outlet temperature sensor; 28. Pressure sensor; 3. Water tank; 30. Water tank cavity; 31. Breathing valve; 32. Scale; 33. Liquid level switch; 34. Top cover; 35. Connecting hole; 36. Drain ball valve; 37. Overflow port; 4. Liquid injection branch; 41. Liquid injection ball valve; 5. Water tank branch; 6. Refrigeration cycle branch; 7. Compressor; 8. Condensing fan; 9. Condenser; 10. Electronic expansion valve. DETAILED DESCRIPTION

[0024] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0025] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0026] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 5The figure shows an automatic liquid-replenishing liquid cooling system equipped with a high- and low-level compatible water tank. The system includes a battery module 1, a main circulation pipeline 2, and a water tank 3. The battery module 1 is composed of multiple vertically arranged battery packs, each layer of which is equipped with a liquid cooling plate to cool the battery packs. The liquid outlet of the battery module 1 is connected to the liquid inlet of the main circulation pipeline 2, which also connects the liquid inlet of the battery module 1 to the liquid outlet of the main circulation pipeline 2, allowing the coolant to circulate. The main circulation pipeline 2 is connected in sequence from the liquid inlet to the water outlet with a solenoid valve 21, a one-way valve 22, a water pump 23, a plate heat exchange unit 24, an electric heating unit 25, and a pressure sensor 28. These components constitute a liquid cooling unit. The pressure sensor 28 is used to detect the pressure of the coolant in the main circulation pipeline 2 in real time and control the opening and closing of the solenoid valve 21 based on this pressure. The water pump 23 is used to circulate the coolant, the plate heat exchange unit 24 is used for heat exchange and cooling, and the electric heating unit 25 is used to provide heating when the temperature is too low. A liquid injection branch 4 is connected to the main circulation pipeline 2 between the one-way valve 22 and the water pump 23. This branch 4 is used to initially inject liquid into the system and is equipped with a liquid injection ball valve 41 for controlling the opening and closing of this branch 4. The inflow of the injection branch 4 is conveniently controlled by the injection ball valve 41. A water tank branch 5 is connected to the main circulation pipeline 2 between the solenoid valve 21 and the one-way valve 22, and the water tank branch 5 is connected to the water tank 3; a breathing valve 31 is provided at the bottom of the water tank 3 to connect the water tank branch 5 with the inner cavity 30 of the water tank; the top of the water tank 3 is connected to the atmosphere, and the coolant in the water tank 3 is allowed to be injected into the main circulation pipeline 2 or drained into the water tank 3 under the action of the breathing valve 31. When the temperature of the coolant in the main circulation pipeline 2 rises, the volume expands and the pressure increases. When the pressure is higher than the exhaust pressure of the breathing valve 31 at the bottom of the water tank 3, the expanded liquid in the main circulation pipeline 2 will push open the spring on the exhaust side of the breathing valve 31, and the coolant in the main circulation pipeline 2 will flow along the intermediate The gap flows to the water tank 3. At this time, the liquid pressure in the system decreases. When the pressure is lower than the exhaust pressure, the valve automatically closes under the force of the spring; when the temperature of the coolant in the main circulation pipeline 2 decreases or it is lost, the volume decreases and the pressure decreases. When the pressure is lower than the suction pressure of the breathing valve 31 at the bottom of the water tank 3, the liquid in the water tank 3 will push open the valve on the suction side of the breathing valve 31, and the coolant in the water tank 3 will flow to the main circulation pipeline 2 along the gap to realize automatic liquid replenishment. Until the system is full of liquid and the pressure rises above the suction pressure, the valve on the suction side is closed again, thereby ensuring that the liquid pressure in the main circulation pipeline 2 of the liquid cooling unit is always between the suction pressure and the exhaust pressure. Figure 5The figure shows the structural principle of the breathing valve 31. Because both the intake and exhaust processes are directly connected to the atmosphere, there is no need to regularly refill the water tank 3 for maintenance. Furthermore, the intake and exhaust pressures are controlled by the degree of spring compression within the breathing valve 31, preventing the coolant in the main circulation line 2 from flowing back into the water tank 3 due to pressure generated by the height difference. This allows the water tank 3 to be placed either high or low in the system, providing a very flexible structural layout.

[0029] like Figure 2 and Figure 3 As shown, a one-way valve 22 is provided at the liquid inlet side of the main circulation pipeline 2, that is, near the inlet of the water pump 23. When the liquid injection ball valve 41 is opened to inject liquid into the system, the coolant can only flow in one direction along the direction indicated by the arrow, which can quickly squeeze the air in the system to the water tank 3 and discharge it through the water tank 3, so that the main circulation pipeline 2 can efficiently reach a state of being filled with liquid, greatly improving the filling speed, and solving the problem that the coolant will flow in both directions at the same time when the one-way valve 22 is not provided, which is very likely to cause air accumulation in places with smaller internal flow channels such as the liquid cooling plate or the plate heat exchange unit 24, and the air in the system cannot be discharged smoothly, which brings harm to the operation of the system.

[0030] like Figure 2 and Figure 3 As shown, a pressure sensor 28 is installed on the main circulation pipeline 2 at the liquid outlet of the energy storage battery module 1. This pressure sensor 28 facilitates real-time detection of the coolant pressure in the pipeline. A solenoid valve 21 is installed at the liquid inlet of the main circulation pipeline 2, and the water tank 3 is located between the solenoid valve 21 and the one-way valve 22. When the system is short of liquid, the liquid supply pressure value will decrease. When the pressure value falls below the lower limit set by the pressure sensor 28, a control signal is triggered to close the solenoid valve 21. At this time, under the suction action of the water pump 23, the liquid pressure at the connection between the bottom of the water tank 3 and the main circulation pipeline 2 will suddenly decrease, triggering the vacuum valve of the breathing valve 31 at the bottom of the water tank 3 to open, and the coolant in the water tank 3 is pumped into the main circulation pipeline 2 along the open channel, realizing the liquid replenishment function. When the liquid in the main circulation pipeline 2 is fully replenished, the liquid pressure increases, and the vacuum valve of the breathing valve 31 at the bottom of the water tank 3 closes. When the liquid supply pressure exceeds the upper limit set by the pressure sensor 28, a control signal is triggered to reopen the solenoid valve 21, completing the liquid replenishment. This makes it convenient for quick rehydration and can also detect in real time whether the system is leaking.

[0031] like Figures 2 to 4As shown, the top of the water tank 3 is provided with an overflow port 37 to prevent the coolant from overflowing from the top. This facilitates the drainage of excess liquid after the water tank 3 is filled to a designated container for collection and storage, thereby avoiding waste of coolant. When liquid is injected from the injection branch 4 into the main circulation pipeline 2, the air in the system will be squeezed into the water tank 3 and discharged. During this process, coolant will also enter the water tank 3. To prevent liquid from spraying after the water tank 3 is filled, an overflow port 37 is provided on the side of the water tank near the top. The overflow port 37 can be connected to a hose to drain the excess liquid after the water tank 3 is filled into a designated container. In addition, if a safety valve is provided in the system, the pressure relief port of the safety valve can also be connected to the overflow port 37 of the water tank 3 through a hose. When the pressure is too high during system operation, the pressure will be released through the safety valve and eventually released to the water tank connected to the atmosphere. If liquid is discharged during the pressure relief process, this part of the liquid will flow through the hose to the water tank 3 and be collected and stored, thereby avoiding waste of coolant.

[0032] like Figure 4 As shown, the lower part of the water tank 3 is provided with a drain ball valve 36 for draining the coolant. The function of the drain ball valve 36 is to enable the water tank 3 to play a role in buffering and stabilizing pressure. After the liquid cooling unit is filled with liquid and before it is officially started, the liquid level in the water tank 3 needs to be adjusted to a suitable height so that the amount of coolant in the water tank 3 is neither too much nor too little. The liquid in the water tank 3 cannot be too little, otherwise when the temperature of the coolant in the main circulation pipeline 2 decreases and the volume decreases or liquid dissipation occurs, the liquid in the water tank will not be enough to make up for this part of the liquid reduction; the liquid in the water tank 3 cannot be too much, otherwise when the temperature of the coolant in the main circulation pipeline 2 increases and the volume expands, the cavity in the water tank 3 will not be enough to accommodate this part of the expansion, resulting in excess liquid being discharged from the overflow port 37 of the water tank 3, resulting in a waste of coolant. In order to facilitate the adjustment of the liquid level height in the water tank 3, the drain ball valve 36 is set in the lower middle part of the water tank 3. During operation, the drain ball valve 36 is opened to adjust the liquid level in the water tank to a suitable height, and then the drain ball valve 36 is closed. The operation is convenient and quick.

[0033] like Figure 4 As shown, taking into account the thermal expansion and contraction effect of the coolant, the liquid level height is matched to the temperature, so a scale 32 for measuring the liquid level is provided in the water tank 3. In order to more conveniently control the liquid level height in the water tank, when the temperature is low, the liquid level in the water tank 3 needs to be at a low level during the initial filling, so as to reserve sufficient space to accommodate the subsequent volume expansion of the coolant when the temperature rises. When the temperature is high, the liquid level in the water tank 3 needs to be at a high level during the initial filling, so that when the coolant temperature drops and the volume decreases, there is enough liquid in the water tank 3 to replenish the main circulation pipeline 2, ensuring that the main circulation pipeline 2 is restored to a state of being full of liquid.

[0034] like Figure 4As shown, in order to take into account that when the liquid level in the water tank 3 is extremely low, the liquid needs to be replenished in time. Otherwise, when the main circulation pipeline 2 is short of liquid, the liquid stock in the water tank 3 may not be enough to replenish it, and the main circulation pipeline 2 cannot be filled with liquid, which has an adverse effect on the operation of the system. Therefore, a liquid level switch 33 is also provided at the bottom of the water tank 3. When the liquid level drops to a certain lower limit, the liquid level switch 33 is triggered to alarm. When the liquid level drops to a certain lower limit, the liquid level switch 33 is triggered to alarm, reminding the operation and maintenance personnel to add liquid to the water tank. At the same time, the top of the water tank 3 is detachably connected to a top cover 34; the bottom of the top cover 34 is provided with a connecting hole 35 connected to the atmosphere. The top cover 34 of this embodiment is opened and closed by screwing, and can be unscrewed directly by hand without the aid of any tools. After unscrewing, liquid can be added to the water tank, which is easy to operate and convenient for outdoor use. It can well prevent foreign matter such as leaves, dust, and rainwater from entering the water tank 3, thereby ensuring the cleanliness of the coolant in the water tank 3.

[0035] like Figure 3 As shown, an inlet temperature sensor 26 is installed on the main circulation pipeline 2 between the energy storage battery module 1 and the solenoid valve 21; an outlet temperature sensor 27 is installed on the main circulation pipeline 2 between the energy storage battery module 1 and the electric heating unit 25. The inlet temperature sensor 26 and the outlet temperature sensor 27 facilitate real-time monitoring of the coolant temperature in the pipeline. A refrigeration cycle branch 6 is also connected to the plate heat exchange unit 24. The plate heat exchange unit 24 serves as a bridge between the main circulation pipeline 2 and the refrigeration cycle branch 6, transferring the cooling energy from the refrigeration cycle branch 6 to the main circulation pipeline 2. The refrigeration cycle branch 6 is connected to a compressor 7, a condensing fan 8, a condenser 9, and an electronic expansion valve 10 in sequence from the liquid inlet to the liquid outlet. The liquid inlet of the compressor 7 is connected to the liquid outlet of the plate heat exchange unit 24, and the liquid outlet of the electronic expansion valve 10 is connected to the liquid inlet of the plate heat exchange unit 24. The compressor 7, condensing fan 8, condenser 9 and electronic expansion valve 10 on the plate heat exchange unit 24 can further improve the heat exchange effect.

[0036] The beneficial effects of the present invention include the following four points: 1. The combination of the water tank 3 structure and the solenoid valve 21 in the liquid cooling unit can achieve maintenance-free operation without the need for regular gas refilling. It is also not restricted by the placement position and can be placed at either a high or low position in the system, fully ensuring the flexibility of the liquid cooling unit layout.

[0037] 2. The specific water tank 3 structure ensures that the liquid cooling unit does not require regular gas refueling maintenance, reducing the difficulty and cost of operation and maintenance; 3. When filling the liquid cooling unit, the one-way valve 22 can quickly discharge the air in the system, so that the liquid cooling system is filled with liquid, avoiding the influence of air accumulation on the normal and stable operation of the system. 4. During the long-term operation of the liquid cooling system, the residual air in the system will be gradually exhausted over time, and the coolant itself will be lost to a certain extent, thereby forming cavities in the system. At this time, the liquid cooling system can automatically replenish the coolant. The breathing valve 31 in the water tank 3 automatically injects the coolant into the main circulation loop of the liquid cooling system to ensure that the main circulation pipeline 2 is always full of liquid.

[0038] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0039] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0040] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank, characterized in that: The invention comprises an energy storage battery module (1), a main circulation pipeline (2) and a water tank (3); the liquid outlet end of the energy storage battery module (1) is connected to the liquid inlet end of the main circulation pipeline (2); the liquid inlet end of the energy storage battery module (1) is connected to the liquid outlet end of the main circulation pipeline (2); the main circulation pipeline (2) is sequentially connected with a solenoid valve (21), a one-way valve (22), a water pump (23), a plate heat exchange unit (24) and a pressure sensor (28) in the direction from the liquid inlet to the liquid outlet; the pressure sensor (28) is used to detect the pressure value of the coolant in the main circulation pipeline (2) in real time, and to control the opening and closing of the solenoid valve (21) according to the pressure value; the plate heat exchange unit (24) is connected to the main circulation pipeline (2) in the direction from the liquid inlet to the liquid outlet; ) is used to transfer cooling capacity to the main circulation pipeline (2); a liquid injection branch (4) is connected between the one-way valve (22) and the water pump (23) on the main circulation pipeline (2); a water tank branch (5) is connected between the solenoid valve (21) and the one-way valve (22) on the main circulation pipeline (2), and the water tank branch (5) is connected to the water tank (3); a breathing valve (31) is provided at the bottom of the water tank (3) to connect the water tank branch (5) and the inner cavity (30) of the water tank; the top of the water tank (3) is connected to the atmosphere, and the cooling liquid in the water tank (3) is injected into the main circulation pipeline (2) or discharged into the water tank (3) under the action of the breathing valve (31).

2. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1 is characterized in that: When the temperature of the coolant in the main circulation pipeline (2) increases, the volume increases and the pressure increases. When the pressure is higher than the exhaust pressure of the breathing valve (31) at the bottom of the water tank (3), the expanded liquid in the main circulation pipeline (2) will push open the valve on the exhaust side of the breathing valve (31), and the coolant in the main circulation pipeline (2) will flow to the water tank (3) along the gap. When the temperature of the coolant in the main circulation pipeline (2) decreases or is lost, the volume decreases and the pressure decreases. When the pressure is lower than the suction pressure of the breathing valve (31) at the bottom of the water tank (3), the liquid in the water tank (3) will push open the valve on the suction side of the breathing valve (31), and the coolant in the water tank (3) will flow to the main circulation pipeline (2) along the gap to achieve automatic liquid replenishment.

3. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: A scale (32) for measuring the liquid level is provided in the water tank (3), and a liquid level switch (33) is also provided at the bottom of the water tank (3). When the liquid level drops to a certain lower limit value, the liquid level switch (33) is triggered to sound an alarm.

4. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: The top of the water tank (3) is detachably connected to a top cover (34); the bottom of the top cover (34) is provided with a communication hole (35) that communicates with the atmosphere.

5. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: A drain ball valve (36) for draining the coolant is provided at the lower portion of the water tank (3).

6. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: The upper portion of the water tank (3) is provided with an overflow port (37) to prevent the coolant from overflowing from the top.

7. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: A liquid inlet temperature sensor (26) is provided on the main circulation pipeline (2) between the energy storage battery module (1) and the solenoid valve (21); and a liquid outlet temperature sensor (27) is provided on the main circulation pipeline (2) between the energy storage battery module (1) and the electric heating unit (25).

8. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: An electric heating unit (25) is provided on the main circulation pipeline (2) between the plate heat exchange unit (24) and the pressure sensor (28).

9. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: The liquid injection branch (4) is provided with a liquid injection ball valve (41) for controlling the opening and closing of the liquid injection branch (4).

10. The automatic liquid replenishment type liquid cooling system equipped with a high and low position compatible water tank according to claim 1, characterized in that: The plate heat exchange unit (24) is also connected to a refrigeration cycle branch (6); the plate heat exchange unit (24) is used to serve as a bridge between the main circulation pipeline (2) and the refrigeration cycle branch (6), and transfers the cold in the refrigeration cycle branch (6) to the main circulation pipeline (2); the refrigeration cycle branch (6) is connected to a compressor (7), a condensing fan (8), a condenser (9) and an electronic expansion valve (10) in sequence from the liquid inlet to the liquid outlet; the liquid inlet end of the compressor (7) is connected to the liquid outlet end of the plate heat exchange unit (24), and the liquid outlet end of the electronic expansion valve (10) is connected to the liquid inlet end of the plate heat exchange unit (24).

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