Cooling system of liquid cooling energy storage cabin

Abstract

The invention discloses a cooling system of a liquid cooling energy storage cabin, and relates to the technical field of liquid cooling energy storage cabins. The cooling system of the liquid cooling energy storage cabin comprises a liquid cooling unit, a first-stage pipeline, a plurality of second-stage pipelines, a plurality of third-stage pipelines and a liquid changing unit, the first-stage pipeline comprises a first-stage liquid inlet pipe and a first-stage liquid return pipe which are connected with the liquid cooling unit, and the second-stage pipelines are arranged in the first-stage pipeline in parallel and comprise second-stage liquid inlet pipes and second-stage liquid return pipes; the multiple third-stage pipelines are arranged in the second-stage pipeline in parallel and comprise third-stage liquid inlet pipes and third-stage liquid return pipes, and the liquid changing unit is arranged corresponding to the second-stage pipeline and used for discharging cooling liquid in the second-stage pipeline and the third-stage pipelines or supplementing the cooling liquid into the second-stage pipeline and the third-stage pipelines. According to the cooling system of the liquid cooling energy storage cabin, liquid supplementing and liquid discharging operation of the cooling liquid conveying pipeline can be achieved in the operation process of the cooling system, operation is convenient and fast, and the system efficiency and operation reliability of the cold energy storage cabin are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled energy storage cabins, and in particular to a cooling system for a liquid-cooled energy storage cabin. Background Art

[0002] With the rapid development of new energy, the demand for battery energy storage systems is increasing. Liquid-cooled energy storage cabins have gradually become the mainstream of the market, and battery modules are the main components of battery energy storage systems. During operation, the battery cells in the liquid-cooled module will continue to generate heat due to the existence of internal resistance, and the heat dissipation system needs to be forced to dissipate the heat to meet the optimal operating temperature of the battery cells and improve system efficiency and reliability.

[0003] In the related technology, for example, a 20-foot liquid-cooled energy storage cabin is composed of 9 battery clusters, each battery cluster is composed of 8 battery modules, and 72 modules need to be cooled. The battery module includes a battery cell and a liquid cooling plate. The liquid cooling unit delivers coolant at a temperature of 18°C ​​to the liquid cooling plate, and provides each liquid cooling plate with a coolant flow rate not less than the design requirement to ensure heat exchange cooling of the liquid-cooled energy storage cabin. However, during use, when the number of battery modules changes, the load of the entire cooling pipeline changes, and the cooling pipeline needs to be replenished or drained. In order to avoid leakage of coolant in the energy storage cabin, the coolant in the cooling pipeline needs to be emptied, and the coolant needs to be delivered and supplied after the cooling pipeline is rearranged. The operation is cumbersome and seriously affects the system efficiency and operational reliability of the liquid-cooled energy storage cabin. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a cooling system for a liquid-cooled energy storage cabin. The cooling system of the liquid-cooled energy storage cabin can realize hierarchical control of the coolant delivery pipeline, and can realize the replenishment and drainage operations of the coolant delivery pipeline during the operation of the cooling system. The operation is convenient and the system efficiency and operational reliability of the cold energy storage cabin are guaranteed.

[0006] The cooling system of the liquid-cooled energy storage cabin according to the embodiment of the present invention comprises:

[0007] A liquid cooling unit, the liquid cooling unit is used to circulate and pump cooling liquid and cool the cooling liquid;

[0008] A primary pipeline, the primary pipeline comprising a primary liquid inlet pipe and a primary liquid return pipe connected to the liquid cooling unit, a first valve being provided at a liquid inlet end of the primary liquid inlet pipe, and a second valve being provided at a liquid discharge end of the primary liquid return pipe;

[0009] A plurality of secondary pipelines, wherein the plurality of secondary pipelines are arranged in parallel between the primary liquid inlet pipe and the primary liquid return pipe, the secondary pipeline comprises a secondary liquid inlet pipe and a secondary liquid return pipe, a third valve is arranged at the liquid inlet end of the secondary liquid inlet pipe, and a fourth valve is arranged at the liquid discharge end of the secondary liquid return pipe;

[0010] A plurality of tertiary pipelines, wherein the plurality of tertiary pipelines are arranged in parallel between the secondary liquid inlet pipe and the secondary liquid return pipe in the secondary pipeline, wherein the tertiary pipeline comprises a tertiary liquid inlet pipe and a tertiary liquid return pipe, wherein the liquid inlet end of the tertiary liquid inlet pipe is provided with a fifth valve, the liquid discharge end of the tertiary liquid inlet pipe is connected to the liquid inlet of the liquid cooling plate, the liquid discharge end of the tertiary liquid return pipe is provided with a sixth valve, and the liquid inlet end of the tertiary liquid return pipe is connected to the liquid discharge port of the liquid cooling plate;

[0011] A fluid replacement unit is provided corresponding to the secondary pipeline, and is used to discharge the coolant in the secondary pipeline and the tertiary pipeline or to replenish the coolant in the secondary pipeline and the tertiary pipeline.

[0012] The cooling system of the liquid-cooled energy storage cabin in the embodiment of the present invention can realize hierarchical control of the coolant delivery pipeline, and can realize the replenishment and drainage operations of the coolant delivery pipeline during the operation of the cooling system. It is easy to operate and ensures the system efficiency and operational reliability of the cold energy storage cabin.

[0013] In some embodiments, the fluid exchange unit includes a first fluid exchange tube and a second fluid exchange tube, the end of the first fluid exchange tube away from the secondary pipeline is connected to a fluid collecting tank for recovering coolant, the first fluid exchange tube is provided with a first fluid exchange valve, the end of the second fluid exchange tube away from the secondary pipeline is connected to a fluid replenishment pump, and the second fluid exchange tube is provided with a second fluid exchange valve and a pressure gauge.

[0014] In some embodiments, a gas supply unit is included, which is arranged at the secondary liquid inlet pipe and is used to transport gas into the secondary pipeline, and the liquid replacement unit is arranged at the secondary liquid return pipe.

[0015] In some embodiments, the air supply unit includes an air supply pump, an air supply pipe and an air supply valve, the two ends of the air supply pipe are respectively connected to the air supply pump and the secondary liquid inlet pipe, and the air supply valve is arranged on the air supply pipe.

[0016] In some embodiments, an automatic exhaust valve is included, and the automatic exhaust valve is arranged on the secondary liquid inlet pipe or the secondary liquid return pipe, and the automatic exhaust valve is used to exhaust the gas in the secondary pipeline.

[0017] In some embodiments, a seventh valve is provided at the discharge end of the first-level liquid inlet pipe, and the seventh valve is connected to the liquid collecting tank through a first liquid return pipe. An eighth valve is provided at the liquid inlet end of the first-level liquid return pipe, and the eighth valve is connected to the liquid collecting tank through a second liquid return pipe.

[0018] In some embodiments, the liquid cooling unit includes a controller, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are all solenoid valves and are electrically connected to the controller.

[0019] In some embodiments, the tertiary liquid inlet pipe and the tertiary liquid return pipe are hoses, a first quick-connect plug is provided between the discharge end of the tertiary liquid inlet pipe and the liquid cooling plate, and a second quick-connect plug is provided between the liquid inlet pipe of the tertiary liquid return pipe and the liquid cooling plate.

[0020] In some embodiments, when the cooling system is replenishing fluid, the third valve and the fourth valve on the secondary pipeline that needs replenishing fluid and the fifth valve and the sixth valve on the tertiary pipeline are opened, and the second liquid exchange valve and the liquid replenishing pump are opened, and the coolant is replenished into the corresponding secondary pipeline and tertiary pipeline through the liquid replenishing pump, and the automatic exhaust valve is opened to discharge the gas in the secondary pipeline and the tertiary pipeline, and the second liquid exchange valve and the liquid replenishing pump are closed when the pressure gauge reading reaches the designed value.

[0021] In some embodiments, when draining the cooling system, the following steps are included:

[0022] S1: Close the third valve and the fourth valve on the secondary pipeline corresponding to the tertiary pipeline that needs to be drained, and close the fifth valve and the sixth valve in the tertiary pipeline other than the secondary pipeline that needs to be drained;

[0023] S2: close the automatic exhaust valve, and deliver gas to the corresponding secondary pipeline through the air supply pump to discharge the coolant in the secondary pipeline and the tertiary pipeline;

[0024] S3: After the coolant in the corresponding secondary pipeline and tertiary pipeline is discharged, the fifth valve and the sixth valve in the tertiary pipeline that needs to be discharged are closed, and the fifth valve and the sixth valve in the tertiary pipeline other than the corresponding secondary pipeline that needs to be discharged are opened;

[0025] S4: Open the second liquid exchange valve, liquid replenishment pump and automatic exhaust valve, add coolant to the secondary pipeline through the liquid replenishment pump, and discharge the gas in the secondary and tertiary pipelines through the automatic exhaust valve. When the pressure gauge reading reaches the designed value, close the second liquid exchange valve and liquid replenishment pump, and open the third valve and the fourth valve on the secondary pipeline corresponding to the tertiary pipeline that needs to be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a connection diagram of the cooling system of the liquid-cooled energy storage cabin according to an embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the connection of the primary pipeline during installation of the cooling system of the liquid-cooled energy storage cabin of an embodiment of the present invention.

[0028] Figure 3 It is a schematic diagram of the connection between the secondary pipeline and the tertiary pipeline during installation of the cooling system of the liquid-cooled energy storage cabin of an embodiment of the present invention.

[0029] Reference numerals:

[0030] Liquid cooling unit 1;

[0031] Primary pipeline 2; primary liquid inlet pipe 21; primary liquid return pipe 22; first valve 23; second valve 24; seventh valve 25; eighth valve 26;

[0032] Secondary pipeline 3; secondary liquid inlet pipe 31; secondary liquid return pipe 32; third valve 33; fourth valve 34;

[0033] Tertiary pipeline 4; tertiary liquid inlet pipe 41; tertiary liquid return pipe 42; fifth valve 43; sixth valve 44;

[0034] Liquid exchange unit 5; first liquid exchange pipe 51; second liquid exchange pipe 52; first liquid exchange valve 53; second liquid exchange valve 54;

[0035] Battery module 6; Liquid cooling plate 61;

[0036] Air supply unit 7; air supply pipe 71; air supply valve 72;

[0037] Automatic exhaust valve 8. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figure 1 , Figure 2 and Figure 3As shown, the cooling system of the liquid-cooled energy storage cabin of the embodiment of the present invention includes a liquid cooling unit 1 for circulating and pumping the coolant and cooling the coolant, a primary pipeline 2 including a primary liquid inlet pipe 21 and a primary liquid return pipe 22 connected to the liquid cooling unit 1, a first valve 23 is provided at the liquid inlet end of the primary liquid inlet pipe 21, and a second valve 24 is provided at the liquid discharge end of the primary liquid return pipe 22, a plurality of secondary pipelines 3 are arranged in parallel between the primary liquid inlet pipe 21 and the primary liquid return pipe 22, the secondary pipeline 3 includes a secondary liquid inlet pipe 31 and a secondary liquid return pipe 32, a third valve 33 is provided at the liquid inlet end of the secondary liquid inlet pipe 31, and a fourth valve 34 is provided at the liquid discharge end of the secondary liquid return pipe 32, and a plurality of third-stage valves 31 and 32 are provided. The pipeline 4 is arranged in parallel between the secondary liquid inlet pipe 31 and the secondary liquid return pipe 32 in the secondary pipeline 3. The tertiary pipeline 4 includes a tertiary liquid inlet pipe 41 and a tertiary liquid return pipe 42. The liquid inlet end of the tertiary liquid inlet pipe 41 is provided with a fifth valve 43, and the discharge end of the tertiary liquid inlet pipe 41 is connected to the liquid inlet of the liquid cooling plate 61 of the battery module 6. The discharge end of the tertiary liquid return pipe 42 is provided with a sixth valve 44, and the liquid inlet end of the tertiary liquid return pipe 42 is connected to the discharge port of the liquid cooling plate 61 of the battery module 6. The liquid exchange unit 5 is arranged corresponding to the secondary pipeline 3, and the liquid exchange unit 5 is used to discharge the cooling liquid in the secondary pipeline and the tertiary pipeline 4 or to replenish the cooling liquid into the secondary pipeline and the tertiary pipeline 4.

[0040] The working principle of the cooling system of the liquid-cooled energy storage cabin of the embodiment of the present invention is as follows: the coolant delivery pipeline is arranged in stages in the primary pipeline 2, the secondary pipeline 3 and the tertiary pipeline 4, the liquid cooling unit 1 delivers the coolant to the multiple secondary liquid inlet pipes 31 through the primary liquid inlet pipe 21, the coolant passes through the tertiary liquid inlet pipe 41 arranged in parallel in the secondary pipeline 3 to reach the liquid cooling plate 61, the coolant exchanges heat with the battery cells in the liquid cooling plate 61 to reduce the temperature of the battery cells, and then passes through the tertiary liquid return pipe connected to the liquid cooling plate 61 42 reaches the secondary liquid return pipe 32, and finally the coolant in multiple secondary liquid return pipes 32 is collected in the primary liquid return pipe 22 and returns to the liquid cooling component, and continues to circulate and transport after the liquid cooling component is cooled down. The first valve 23 and the second valve 24 are used to control the transport of the coolant in the primary pipeline 2, the third valve 33 and the fourth valve 34 are used to control the transport of the coolant in the secondary pipeline 3, and the fifth valve 43 and the sixth valve 44 are used to control the transport of the coolant in the tertiary pipeline 4. The liquid exchange unit 5 is connected with the secondary pipeline 3. When the secondary pipeline 3 or the tertiary pipeline 4 needs to be supplemented with coolant, the coolant can be supplemented to the secondary pipeline 3 by opening the liquid exchange unit 5 on the corresponding secondary pipeline 3 and the fifth valve 43 and the sixth valve 44 in the corresponding tertiary pipeline 4. When the coolant in the corresponding secondary pipeline 3 and the tertiary pipeline 4 is discharged, the third valve 33 and the fourth valve 34 on the corresponding secondary pipeline 3 can be closed and the coolant in the corresponding secondary pipeline 3 and the tertiary pipeline 4 can be discharged through the liquid exchange unit 5. When the coolant in the tertiary pipeline 4 is discharged, the fifth valve 43 on the corresponding tertiary liquid inlet pipe 41 and the sixth valve 44 on the tertiary pipeline 4 other than the cooling pipeline that needs to be discharged on the corresponding secondary pipeline 3 are closed, and the coolant on the corresponding tertiary pipeline 4 is discharged through the liquid exchange unit 5. Finally, the sixth valve 44 on the tertiary pipeline 4 that needs to be discharged is closed, and the sixth valve 44 on the tertiary pipeline 4 other than the cooling pipeline that needs to be discharged on the corresponding secondary pipeline 3 is opened to replenish liquid into the secondary pipeline 3 and the tertiary pipeline 4.

[0041] The cooling system of the liquid-cooled energy storage cabin in the embodiment of the present invention can realize hierarchical control of the coolant delivery pipeline, and can realize the replenishment and drainage operations of the coolant delivery pipeline during the operation of the cooling system. It is easy to operate and ensures the system efficiency and operational reliability of the cold energy storage cabin.

[0042] Optionally, the liquid cooling unit 1 is composed of a pump group, a compressor, an evaporator, a condenser and connecting pipes to provide the entire liquid cooling system with coolant that meets the temperature and flow requirements of the equipment. The parallel ends of the first-level liquid inlet pipe 21 and the first-level liquid return pipe 22 are designed with stainless steel braided hoses to avoid installation errors and absorb vibrations when the system is started and stopped. The first-level liquid inlet pipe 21 and the first-level liquid return pipe 22 are fixed to the mounting plate at the bottom of the container by pipe clamps.

[0043] Optionally, the secondary pipeline 3 is connected to the primary pipeline 2 via a flexible joint, and a reducing tee connected to the tertiary pipeline 4 is provided on the secondary pipeline 3 .

[0044] In some embodiments, Figure 1 As shown, the liquid exchange unit 5 includes a first liquid exchange tube 51 and a second liquid exchange tube 52. The end of the first liquid exchange tube 51 away from the secondary pipeline 3 is connected to a liquid collecting tank for recovering the coolant. The first liquid exchange tube 51 is provided with a first liquid exchange valve 53. The end of the second liquid exchange tube 52 away from the secondary pipeline 3 is connected to a liquid replenishing pump. The second liquid exchange tube 52 is provided with a second liquid exchange valve 54 and a pressure gauge.

[0045] Specifically, when the cooling system needs to be supplemented with coolant, the third valve 33 and the fourth valve 34 on the secondary pipeline 3 that needs to be supplemented and the fifth valve 43 and the sixth valve 44 on the tertiary pipeline 4 are opened, and the second liquid exchange valve 54 and the liquid replenishment pump are opened, and the coolant is replenished into the corresponding secondary pipeline 3 and the tertiary pipeline 4 through the liquid replenishment pump. When the pressure gauge reading reaches the design value, the second liquid exchange valve 54 and the liquid replenishment pump are closed.

[0046] By setting the first liquid exchange pipe 51 and the second liquid exchange pipe 52, the replenishment operation and the drainage operation of the liquid exchange unit 5 are controlled separately, thereby ensuring the replenishment and drainage effects of the coolant delivery pipeline. By setting a pressure gauge, the liquid delivery pressure in the secondary pipeline 3 during the replenishment process can be monitored to ensure the heat exchange efficiency of the liquid cooling plate 61 in the tertiary pipeline 4.

[0047] Optionally, in the liquid replacement unit 5, the liquid replenishing pump is arranged in a liquid collecting tank, and the liquid collecting tank stores cooling liquid.

[0048] In some embodiments, Figure 1 As shown, it includes an air supply unit 7, which includes an air supply pump, an air supply pipe 71 and an air supply valve 72. The two ends of the air supply pipe 71 are respectively connected to the air supply pump and the secondary liquid inlet pipe 31. The air supply valve 72 is arranged on the air supply pipe 71. The connection and isolation between the air supply pipe 71 and the secondary liquid inlet pipe 31 are controlled by the air supply valve 72. The air supply pump can transport gas to the secondary pipeline 3 through the air supply pipe 71 to discharge the coolant in the corresponding secondary pipeline 3 and the tertiary pipeline 4. The liquid exchange unit 5 is arranged on the secondary liquid return pipe 32. When the air supply unit 7 transports gas to the secondary pipeline 3, it is more convenient to discharge the coolant in the secondary pipeline 3 and the tertiary pipeline 4.

[0049] In some embodiments, Figure 1 and Figure 3As shown, it includes an automatic exhaust valve 8, which is arranged on the secondary liquid inlet pipe 31 or the secondary liquid return pipe 32. When the secondary pipeline 3 and the tertiary pipeline 4 are replenished with liquid, the automatic exhaust valve 8 can be opened to discharge the gas that may exist in the secondary pipeline 3 and the tertiary pipeline 4, so as to avoid the gas from gathering at the position of the liquid cooling plate 61 in the tertiary pipeline 4 and affecting the cooling effect on the battery cell.

[0050] Optionally, the secondary liquid return pipe 32 is vertically arranged, and the automatic exhaust valve 8 is arranged on the top of the secondary liquid return pipe 32 .

[0051] When draining the cooling system, the following steps are included:

[0052] S1: Close the third valve 33 and the fourth valve 34 on the secondary pipeline 3 where the tertiary pipeline 4 that needs to be drained is located, isolate the secondary pipeline 3 that needs to be drained, ensure the normal operation of the primary pipeline 2 and the secondary pipeline 3 that does not need to be drained, ensure the cooling of the liquid-cooled energy storage cabin, and close the fifth valve 43 and the sixth valve 44 in the tertiary pipeline 4 other than the one that needs to be drained in the corresponding secondary pipeline 3, connect the tertiary pipeline 4 that needs to be drained with the corresponding secondary pipeline 3, and realize the isolation of the tertiary pipeline 4 that needs to be drained;

[0053] S2: close the automatic exhaust valve 8, open the first liquid exchange valve 53, and use the air supply pump to deliver gas to the corresponding secondary pipeline 3 to discharge the coolant in the secondary pipeline 3 and the tertiary pipeline 4. The coolant in the secondary pipeline 3 and the tertiary pipeline 4 enters the liquid collection tank through the first liquid exchange pipe 51;

[0054] S3: After the coolant in the corresponding secondary pipeline 3 and the tertiary pipeline 4 is discharged, the fifth valve 43 and the sixth valve 44 in the tertiary pipeline 4 that needs to be discharged are closed, and the fifth valve 43 and the sixth valve 44 in the tertiary pipeline 4 other than the one that needs to be discharged in the corresponding secondary pipeline 3 are opened to prepare for the replenishment of the coolant in the secondary pipeline from which the coolant has been discharged;

[0055] S4: Open the second liquid exchange valve 54, the liquid replenishing pump and the automatic exhaust valve 8, add coolant to the secondary pipeline 3 through the liquid replenishing pump, and discharge the gas in the secondary pipeline 3 and the tertiary pipeline 4 through the automatic exhaust valve 8. When the pressure gauge reading reaches the designed value, close the second liquid exchange valve 54 and the liquid replenishing pump, and open the third valve 33 and the fourth valve 34 on the secondary pipeline 3 corresponding to the tertiary pipeline 4 that needs to be drained, connect the secondary pipeline 3 with the primary pipeline 2, and realize the drainage operation of the coolant delivery pipeline during the operation of the cooling system.

[0056] In some embodiments, Figure 1As shown, a seventh valve 25 is provided at the discharge end of the first-level liquid inlet pipe 21, and the seventh valve 25 is connected to the liquid collecting tank through the first return pipe. An eighth valve 26 is provided at the liquid inlet end of the first-level liquid return pipe 22, and the eighth valve 26 is connected to the liquid collecting tank through the second return pipe. The coolant in the first-level pipeline 2 is depressurized and discharged through the seventh valve 25 and the eighth valve 26, and it can also be used for equipment pressure resistance test, which is convenient to operate.

[0057] In some embodiments, the liquid cooling unit 1 includes a controller, and the first valve 23, the second valve 24, the third valve 33, the fourth valve 34, the fifth valve 43, the sixth valve 44, the seventh valve 25 and the eighth valve 26 are all solenoid valves and are electrically connected to the controller. The signal control operation of the first valve 23, the second valve 24, the third valve 33, the fourth valve 34, the fifth valve 43, the sixth valve 44, the seventh valve 25 and the eighth valve 26 is convenient through the controller, which can reduce the workload of personnel.

[0058] In some embodiments, the tertiary liquid inlet pipe 41 and the tertiary liquid return pipe 42 are hoses, a first quick-connect plug is provided between the discharge end of the tertiary liquid inlet pipe 41 and the liquid cooling plate 61, and a second quick-connect plug is provided between the liquid inlet pipe of the tertiary liquid return pipe 42 and the liquid cooling plate 61. By setting the quick-connect plug and setting the tertiary liquid inlet pipe 41 and the tertiary liquid return pipe 42 as hoses, it is convenient to quickly connect and disassemble the tertiary pipeline 4 and the liquid cooling plate 61, and it is convenient to remove the battery module.

[0059] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "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" or "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.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cooling system for a liquid-cooled energy storage cabin, characterized in that: include: A liquid cooling unit, the liquid cooling unit is used to circulate and pump cooling liquid and cool the cooling liquid; A primary pipeline, the primary pipeline comprising a primary liquid inlet pipe and a primary liquid return pipe connected to the liquid cooling unit, a first valve being provided at a liquid inlet end of the primary liquid inlet pipe, and a second valve being provided at a liquid discharge end of the primary liquid return pipe; A plurality of secondary pipelines, wherein the plurality of secondary pipelines are arranged in parallel between the primary liquid inlet pipe and the primary liquid return pipe, the secondary pipeline comprises a secondary liquid inlet pipe and a secondary liquid return pipe, a third valve is arranged at the liquid inlet end of the secondary liquid inlet pipe, and a fourth valve is arranged at the liquid discharge end of the secondary liquid return pipe; A plurality of tertiary pipelines, wherein the plurality of tertiary pipelines are arranged in parallel between the secondary liquid inlet pipe and the secondary liquid return pipe in the secondary pipeline, wherein the tertiary pipeline comprises a tertiary liquid inlet pipe and a tertiary liquid return pipe, wherein the liquid inlet end of the tertiary liquid inlet pipe is provided with a fifth valve, the liquid discharge end of the tertiary liquid inlet pipe is connected to the liquid inlet of the liquid cooling plate, the liquid discharge end of the tertiary liquid return pipe is provided with a sixth valve, and the liquid inlet end of the tertiary liquid return pipe is connected to the liquid discharge port of the liquid cooling plate; A fluid replacement unit is provided corresponding to the secondary pipeline, and is used to discharge the coolant in the secondary pipeline and the tertiary pipeline or to replenish the coolant in the secondary pipeline and the tertiary pipeline.

2. The cooling system of the liquid-cooled energy storage cabin according to claim 1, characterized in that: The liquid exchange unit includes a first liquid exchange tube and a second liquid exchange tube, the end of the first liquid exchange tube away from the secondary pipeline is connected to a liquid collecting tank for recovering coolant, the first liquid exchange tube is provided with a first liquid exchange valve, the end of the second liquid exchange tube away from the secondary pipeline is connected to a liquid replenishment pump, and the second liquid exchange tube is provided with a second liquid exchange valve and a pressure gauge.

3. The cooling system of the liquid-cooled energy storage cabin according to claim 2, characterized in that: It comprises an air supply unit, which is arranged at the secondary liquid inlet pipe and is used to transport gas into the secondary pipeline, and the liquid replacement unit is arranged at the secondary liquid return pipe.

4. The cooling system of the liquid-cooled energy storage cabin according to claim 3, characterized in that: The air supply unit comprises an air supply pump, an air supply pipe and an air supply valve. The two ends of the air supply pipe are respectively connected to the air supply pump and the secondary liquid inlet pipe. The air supply valve is arranged on the air supply pipe.

5. The cooling system of the liquid-cooled energy storage cabin according to claim 4, characterized in that: It comprises an automatic exhaust valve, which is arranged on the secondary liquid inlet pipe or the secondary liquid return pipe, and is used to exhaust the gas in the secondary pipeline.

6. The cooling system of the liquid-cooled energy storage cabin according to claim 2, characterized in that: A seventh valve is provided at the discharge end of the first-level liquid inlet pipe, and the seventh valve is connected to the liquid collecting tank through the first liquid return pipe. An eighth valve is provided at the liquid inlet end of the first-level liquid return pipe, and the eighth valve is connected to the liquid collecting tank through the second liquid return pipe.

7. The cooling system of the liquid-cooled energy storage cabin according to claim 6, characterized in that: The liquid cooling unit comprises a controller, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are all solenoid valves and are electrically connected to the controller.

8. The cooling system of the liquid-cooled energy storage cabin according to claim 1, characterized in that: The three-stage liquid inlet pipe and the three-stage liquid return pipe are hoses. A first quick-connect plug is provided between the discharge end of the three-stage liquid inlet pipe and the liquid cooling plate, and a second quick-connect plug is provided between the liquid inlet pipe of the three-stage liquid return pipe and the liquid cooling plate.

9. The cooling system of the liquid-cooled energy storage cabin according to claim 5, characterized in that: When replenishing the cooling system, open the third valve and the fourth valve on the secondary pipeline that needs replenishment and the fifth valve and the sixth valve on the tertiary pipeline, and open the second liquid exchange valve and the liquid replenishment pump. Use the liquid replenishment pump to replenish coolant into the corresponding secondary and tertiary pipelines, and open the automatic exhaust valve to discharge the gas in the secondary and tertiary pipelines. When the pressure gauge reading reaches the design value, close the second liquid exchange valve and the liquid replenishment pump.

10. The cooling system of the liquid-cooled energy storage cabin according to claim 5, characterized in that: When draining the cooling system, the following steps are included: S1: Close the third valve and the fourth valve on the secondary pipeline corresponding to the tertiary pipeline that needs to be drained, and close the fifth valve and the sixth valve in the tertiary pipeline other than the secondary pipeline that needs to be drained; S2: close the automatic exhaust valve, and deliver gas to the corresponding secondary pipeline through the air supply pump to discharge the coolant in the secondary pipeline and the tertiary pipeline; S3: After the coolant in the corresponding secondary pipeline and tertiary pipeline is discharged, the fifth valve and the sixth valve in the tertiary pipeline that needs to be discharged are closed, and the fifth valve and the sixth valve in the tertiary pipeline other than the corresponding secondary pipeline that needs to be discharged are opened; S4: Open the second liquid exchange valve, liquid replenishment pump and automatic exhaust valve, add coolant to the secondary pipeline through the liquid replenishment pump, and discharge the gas in the secondary and tertiary pipelines through the automatic exhaust valve. When the pressure gauge reading reaches the designed value, close the second liquid exchange valve and liquid replenishment pump, and open the third valve and the fourth valve on the secondary pipeline corresponding to the tertiary pipeline that needs to be discharged.

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