Liquid cooling circulation structure

Abstract

The utility model discloses a liquid cooling circulation structure which comprises a liquid inlet system, a liquid supplementing system, a Y-shaped filter, an outer circulation pump, a heat exchange plate and a liquid outlet system which are sequentially connected, the liquid supplementing system comprises a circulation water tank, a first ball valve, a breather pipe, a liquid supplementing water tank and a one-way valve, and the breather pipe and a first liquid supplementing opening are arranged on the upper portion of the liquid supplementing water tank. The upper portion of the liquid supplementing water tank is connected with the circulating water tank through a pipeline provided with a ball valve, and a one-way valve is installed below the liquid supplementing water tank and connected into the circulating water tank through a pipeline. And the liquid supplementing water tank is higher than the circulating water tank. According to the utility model, gravitational potential energy is used for supplementing liquid for the liquid cooling system, so that residual air in the system is avoided, the cavitation phenomenon of the system is improved, the cooling capacity of cooling liquid can be effectively improved, the temperature consistency between battery packs is optimized, and the service life of batteries is prolonged; the liquid cooling system provided by the utility model is also convenient for workers to overhaul, and is beneficial to reducing the operation cost of the system.

Description

Technical Field

[0001] The utility model relates to a liquid cooling circulation structure and belongs to the technical field of new energy battery modules. Background Art

[0002] With the continuous development of energy storage technology, the energy density of existing energy storage systems is getting higher and higher, and the heat generated by the system is also getting higher and higher. The existing heat dissipation system generally adopts air cooling, which cannot meet the battery thermal management requirements of large energy storage systems. In order to solve this technical problem, the industry currently uses liquid cooling systems to replace air cooling systems to increase heat exchange efficiency and improve heat dissipation capacity. The existing liquid cooling system is generally composed of an energy storage liquid cooling unit, pipelines, and battery liquid cooling plates. Its refilling system generally includes a refilling pump, a one-way valve, a refilling water tank, and a pressure relief valve. The above-mentioned refilling system is generally arranged inside the energy storage liquid cooling unit, which is not conducive to maintenance personnel to check the water tank liquid level. It generally adopts two refilling methods: first, the entire liquid cooling system is vacuumed from the refilling port or the drain port, and then the coolant is added; this method cannot completely evacuate the system, and there is air residue in the system; second, the coolant is directly filled into the system by a water pump using high-pressure liquid injection. When the pressure in the liquid cooling system drops below the set value, a small water pump is started to extract the coolant in the water tank as a cooling system refill. This method cannot squeeze all the air out of the system from the high drain valve. The basic principle of both methods is to control according to pressure. When there is residual air in the system, the sensitivity of the pressure parameter will decrease. If there is a small amount of leakage in the residual air, the rehydration system will not work. In addition to the technical problem of insufficient sensitivity of the pressure system, the system also has cavitation and serious corrosion of the water pump blades, which affects the life of the water pump; and due to the mixing of coolant, the air cooling capacity decreases, and the consistency of temperature control of different batteries will decrease, resulting in a decrease in the capacity and life of the energy storage device. Based on the above background, it is urgent to develop a cooling circulation structure that is easy to replenish and has less residual air. Utility Model Content

[0003] The purpose of the utility model is to provide a liquid cooling circulation structure to solve the technical problems in the above background.

[0004] The technical solution for achieving the purpose of the utility model is: a liquid cooling circulation structure, including a liquid inlet system, a liquid replenishment system, a Y-shaped filter, an external circulation pump and a heat exchange plate and a liquid outlet system connected in sequence, the liquid replenishment system including a circulating water tank, a first ball valve, a ventilation pipe, a liquid replenishment water tank and a one-way valve, a ventilation pipe and a first liquid replenishment port are provided on the upper part of the liquid replenishment water tank, the upper part of the liquid replenishment water tank is connected to the circulating water tank through a pipeline provided with a ball valve, a one-way valve is installed at the bottom of the liquid replenishment water tank and is connected to the circulating water tank through a pipeline; the liquid replenishment water tank is higher than the circulating water tank.

[0005] By adopting the above scheme, when the circulating liquid cooling system is working, the coolant in the heat exchange plate enters the liquid cooling machine system through the liquid inlet, gas-liquid separation is carried out in the circulating water tank, and the air enters the liquid replenishment water tank through the air pipe via the first ball valve and enters the atmosphere through the exhaust pipe; the liquid continues to flow through the Y-shaped filter, and continues to flow through the heat exchange plate driven by the external circulation pump and is supplied to the heat exchange plate after temperature control; during the operation of the system, when the gas-liquid separation is large, under the action of atmospheric pressure and gravitational potential difference, the coolant in the liquid replenishment tank is pressed into the circulating water tank through the one-way valve to ensure that the external circulation pump is full of coolant to avoid the occurrence of cavitation.

[0006] The utility model upgrades the closed cooling system to an open system, and uses gravitational potential energy to replenish the liquid cooling system, making the replenishment and emptying of the liquid cooling system more convenient, avoiding residual air in the system, improving the cavitation phenomenon of the system, and can effectively increase the cooling capacity of the coolant, optimize the temperature consistency between battery packs, and help to increase battery life; the liquid cooling system in the utility model is also convenient for staff to carry out maintenance, which is beneficial to reducing the operating costs of the system.

[0007] The liquid inlet system includes a liquid inlet, a second liquid replenishment port, a second ball valve, a first pressure sensor and a first temperature sensor. One end of the first ball valve is connected to the liquid replenishment port and connected in parallel with the liquid inlet, and then connected to the circulating water tank through the first pressure sensor and the first temperature sensor.

[0008] When in use, open the second ball valve and the liquid replenishment port and connect the external liquid replenishment water pump. Under the drive of the external water pump, the liquid cooling circulation system is filled with a large amount of coolant until the external pump pressure protection stops replenishing the liquid. The coolant is replenished into the liquid replenishment water tank from the liquid replenishment port, and the external circulation pump is turned on. Under the drive of the external circulation pump, the coolant in the liquid cooling circulation system flows, and the gas-liquid separation is continued in the circulating water tank, and finally the entire liquid cooling system is filled with coolant.

[0009] The liquid outlet system includes a liquid outlet, a drain port, a third ball valve, a second pressure sensor and a second temperature sensor. The second ball valve is connected to the drain port and connected in parallel with the liquid outlet, and then connected to the heat exchange plate via the second pressure sensor and the second temperature sensor.

[0010] When the coolant needs to be discharged, open the liquid outlet to discharge the coolant, open the third ball valve, the second pressure sensor and the second temperature sensor, and judge the residual gas in the cooling system according to the preset parameters. When the pressure exceeds the preset value, the residual air is too large. At this time, open the third ball valve and connect the drain port to the external drain pump to drain the coolant with the help of the external drain pump.

[0011] The refilling water tank is provided with a liquid level observation window or a liquid level sensing device, so that engineers can observe the liquid level in the refilling water tank at any time and carry out refilling and maintenance work.

[0012] A data processing system is also provided, which is connected to the second ball valve, the first pressure sensor and the first temperature sensor of the liquid inlet system and the third ball valve, the second pressure sensor and the second temperature sensor of the liquid outlet system for processing pressure data and performing feedback control.

[0013] The plate heat exchanger is a detachable plate heat exchanger, which can be replaced in time after the heat exchange effect decreases, so as to reduce the overall maintenance cost of the liquid cooling system.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] The utility model upgrades the closed cooling system to an open system, and uses gravitational potential energy to replenish the liquid cooling system, making the replenishment and emptying of the liquid cooling system more convenient, avoiding residual air in the system, improving the cavitation phenomenon of the system, and can effectively increase the cooling capacity of the coolant, optimize the temperature consistency between battery packs, and help to increase battery life; the liquid cooling system in the utility model is also convenient for staff to carry out maintenance, which is beneficial to reducing the operating costs of the system.

[0016] The utility model also designs a liquid replenishing system, which uses the liquid replenishing system, an external circulation water pump and a liquid replenishing water tank to cooperate with each other to fill the liquid cooling system with coolant, thereby effectively realizing gas-liquid separation.

[0017] The utility model also designs a drainage system, which drains the coolant under the joint action of an external drainage water pump, a pressure sensor and a temperature sensor, thereby realizing effective drainage of the system air.

[0018] The liquid replenishing water tank of the utility model is provided with a liquid level observation window or a liquid level sensing device, so that engineers can observe the liquid level in the liquid replenishing water tank at any time to carry out liquid replenishing and maintenance work.

[0019] The utility model is also provided with a data processing system, which is connected to the second ball valve, the first pressure sensor and the first temperature sensor of the liquid inlet system and the third ball valve, the second pressure sensor and the second temperature sensor of the liquid outlet system, and is used for processing pressure data and performing feedback control.

[0020] (6) The plate heat exchanger of the utility model is a detachable plate heat exchanger, which can be replaced in time after the heat exchange effect decreases, so as to reduce the overall maintenance cost of the liquid cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0022] Figure 1It is a structural schematic diagram of the utility model.

[0023] The reference numerals in the accompanying drawings are:

[0024] Liquid inlet system 1, liquid inlet 11, second liquid replenishment port 12, second ball valve 13, first pressure sensor 14, first temperature sensor 15, liquid replenishment system 2, circulating water tank 21, first ball valve 22, ventilation pipe 23, liquid replenishment water tank 24, first liquid replenishment port 241, and one-way valve 25, ball valve 26, Y-shaped filter 3, external circulation pump 4, heat exchange plate 5, liquid outlet system 6, liquid outlet 61, drain port 62, third ball valve 63, second pressure sensor 64, second temperature sensor 65. DETAILED DESCRIPTION

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the embodiments of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0030] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the scope of protection of the utility model.

[0031] (Example 1)

[0032] See Figure 1 A liquid cooling circulation structure of the present embodiment includes a liquid inlet system 1, a liquid replenishment system 2, a Y-shaped filter 3, an external circulation pump 4, a heat exchange plate 5 and a liquid outlet system 6 connected in sequence, the liquid replenishment system 2 includes a circulating water tank 21, a first ball valve 22, a vent pipe 23, a liquid replenishment water tank 24 and a one-way valve 25, the upper part of the liquid replenishment water tank 24 is provided with a vent pipe 23 and a first liquid replenishment port 241, the upper part of the liquid replenishment water tank 24 is connected to the circulating water tank 21 through a pipeline provided with a ball valve 26, a one-way valve 25 is installed below the liquid replenishment water tank 24 and is connected to the circulating water tank 21 through a pipeline; the liquid replenishment water tank 24 is higher than the circulating water tank 21.

[0033] The liquid inlet system 1 includes a liquid inlet 11, a second liquid replenishing port 12, a second ball valve 13, a first pressure sensor 14 and a first temperature sensor 15. One end of the second ball valve 13 is connected to the liquid replenishing port 12 and connected in parallel with the liquid inlet 11, and then connected to the circulating water tank 21 through the first pressure sensor 14 and the first temperature sensor 15.

[0034] The liquid outlet system 6 includes a liquid outlet 61, a drain port 62, a third ball valve 63, a second pressure sensor 64 and a second temperature sensor 65. The third ball valve 63 is connected to the drain port 62 and connected in parallel with the liquid outlet 61, and then connected to the heat exchange plate 5 via the second pressure sensor 64 and the second temperature sensor 65.

[0035] When using, there are two ways to replenish fluid.

[0036] The first method is to open the first ball valve 22, connect the second liquid replenishing port 12 to an external liquid replenishing water pump, and fill the liquid cooling circulation system with a large amount of coolant under the drive of the external water pump until the external pump pressure protection stops replenishing the coolant, and replenish the coolant into the liquid replenishing water tank 24 from the first liquid replenishing port 241, and start the external circulation pump 4. Under the drive of the external circulation pump 4, the coolant in the entire liquid cooling circulation system flows, and the gas-liquid separation is continued in the circulating water tank 21, and finally the entire system is filled with coolant.

[0037] The second method is to continuously add coolant to the refilling water tank 24 from the first refilling port 241. Driven by atmospheric pressure and gravitational potential difference, a large amount of coolant is filled in the system, and the external circulation pump 4 is turned on. Driven by the external circulation pump 4, the coolant in the entire liquid cooling circulation system flows, and the gas and liquid are continuously separated in the circulating water tank 21, and finally the entire system is filled with coolant. During maintenance, the maintenance personnel can observe the liquid level of the 6-refilling water tank suspended at the highest point of the system at any time to confirm whether refilling is needed.

[0038] The replenishing water tank 24 here is usually connected to the atmosphere, and the replenishing is carried out under the action of atmospheric pressure and gravity. The circulating water tank 21 is used for buffering, constant pressure and gas-liquid separation. The replenishing water tank 24 is usually located at the highest point and can automatically adjust the pressure when the position is fixed. When the pressure in the liquid cooling system exceeds the normal value, the ventilation pipe 23 of the circulating water tank 21 and the first ball valve 22 are normally open and directly enter the replenishing water tank 24 to release the pressure and spray into the atmosphere.

[0039] Compared with the existing built-in system, this structure has better emptying performance and is easier to maintain, more convenient to use, and can effectively improve the cavitation phenomenon of the water pump, extend the life of the system, increase the cooling capacity of the cooling system, and improve the consistency of different liquid cooling systems.

[0040] The liquid replenishing water tank 24 is provided with a liquid level observation window or a liquid level sensing device, which is more conducive to observation so as to facilitate timely replenishment of coolant.

[0041] A data processing system is also provided, which is connected to the second ball valve 13, the first pressure sensor 14 and the first temperature sensor 15 of the liquid inlet system 1 and the third ball valve 63, the second pressure sensor 64 and the second temperature sensor 65 of the liquid outlet system 6, and is used for its pressure data and feedback control to facilitate the realization of automated liquid replenishment operation.

[0042] The heat exchange plate 5 is a detachable plate heat exchanger, which is convenient for replacement when the heat exchange plate ages and its performance deteriorates, and also convenient for controlling heat dissipation parameters according to different heat dissipation requirements.

[0043] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid cooling circulation structure, characterized in that: The invention comprises a liquid inlet system (1), a liquid replenishment system (2), a Y-shaped filter (3), an external circulation pump (4), a heat exchange plate (5) and a liquid outlet system (6) which are connected in sequence. The liquid replenishment system (2) comprises a circulating water tank (21), a first ball valve (22), a vent pipe (23), a liquid replenishment water tank (24) and a one-way valve (25). The upper part of the liquid replenishment water tank (24) is provided with a vent pipe (23) and a first liquid replenishment port (241). The upper part of the liquid replenishment water tank (24) is connected to the circulating water tank (21) via a pipeline provided with a ball valve (26). The lower part of the liquid replenishment water tank (24) is provided with a one-way valve (25) and is connected to the circulating water tank (21) via a pipeline. The liquid replenishment water tank (24) is higher than the circulating water tank (21).

2. A liquid cooling circulation structure according to claim 1, characterized in that: The liquid inlet system (1) comprises a liquid inlet (11), a second liquid replenishing port (12), a second ball valve (13), a first pressure sensor (14) and a first temperature sensor (15); one end of the second ball valve (13) is connected to the liquid replenishing port (12) and connected in parallel with the liquid inlet (11) and then connected to a circulating water tank (21) via the first pressure sensor (14) and the first temperature sensor (15).

3. A liquid cooling circulation structure according to claim 1, characterized in that: The liquid outlet system (6) comprises a liquid outlet (61), a liquid discharge port (62), a third ball valve (63), a second pressure sensor (64), and a second temperature sensor (65); the third ball valve (63) is connected to the liquid discharge port (62), connected in parallel with the liquid outlet (61), and then connected to the heat exchange plate (5) via the second pressure sensor (64) and the second temperature sensor (65).

4. A liquid cooling circulation structure according to claim 1, characterized in that: The liquid replenishment water tank (24) is provided with a liquid level observation window or a liquid level sensing device.

5. A liquid cooling circulation structure according to claim 2 or 3, characterized in that: A data processing system is also provided, the data processing system being connected to the second ball valve (13), the first pressure sensor (14) and the first temperature sensor (15) of the liquid inlet system (1) and the third ball valve (63), the second pressure sensor (64) and the second temperature sensor (65) of the liquid outlet system (6) for processing pressure data and performing feedback control.

6. A liquid cooling circulation structure according to claim 1, characterized in that: The heat exchange plate (5) is a detachable plate heat exchanger.

Images