Energy-saving cooling water end device for liquid cooling energy storage system

Abstract

The utility model relates to an energy-saving cooling water end device for a liquid cooling energy storage system, which comprises a water return port (2) and a water supply port (3) which are arranged in an inner water cooling pipeline system (1), the water return port (2) is respectively connected with a preheating pipeline (15) and a refrigeration pipeline (16) through a water return main pipe (4), and the preheating pipeline (15) and the refrigeration pipeline (16) respectively enter an HE plate exchanger (17). The waste heat utilization devices (18) and the outer water cooling devices (19) are matched with each other; the outlet ends of the preheating pipeline (15) and the refrigeration pipeline (16) are connected with a water supply main pipe (20), and the outlet end of the water supply main pipe (20) is connected with a water supply port (3); and a frequency conversion operation device (26) is also arranged between the water return main pipe (4) and the water supply main pipe (20). The utility model has the advantages that the energy consumption of the thermal management terminal is reduced, the heat dissipation of the battery in the system is facilitated, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling energy storage, in particular to an energy-saving cooling water terminal device for a liquid cooling energy storage system. Background Art

[0002] During the operation of ordinary systems, the pump will always be in operation, which will generate relatively large energy consumption, and generally electric heating is used to heat the battery system. Figure 1 The figure shows the circulation path of a general unit during operation, including the left path A and the right path B. When cooling, cold water is input into the external cooling pipeline, and the outlet water temperature is adjusted by adjusting the amount of water passing through the plate exchanger; when heating, electric heating is used directly on the pipeline to heat the secondary water circuit; the heating energy consumption is high, and the water still flows along the original pipeline when in standby mode. The pump power is large and the operating energy consumption is high. Utility Model Content

[0003] The purpose of the utility model is to solve the problem of high heating energy consumption and operating energy consumption of the existing system, and to provide an energy-saving cooling water terminal device for a liquid-cooled energy storage system, which reduces the energy consumption of the thermal management terminal, facilitates the heat dissipation of the battery in the system, and increases the battery life.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An energy-saving cooling water terminal device for a liquid-cooled energy storage system, comprising a water return port provided in an internal water-cooled cooling pipe system, the water return port being connected to a water return main pipe, the water return main pipe being connected in sequence with a first butterfly valve, a first filter, a first stop valve, a main water pump, a second butterfly valve, a second stop valve and a first electric three-way valve, the first outlet of the first electric three-way valve being connected to a first main pipe, and the second outlet being connected to a second main pipe;

[0006] The first main pipe is connected to the inlet of the second electric three-way valve, the first outlet of the second electric three-way valve is connected to the preheating pipe, and the second outlet is connected to the refrigeration pipe. The preheating pipe and the refrigeration pipe enter the HE plate exchanger respectively. The HE plate exchanger is also connected to the waste heat utilization device and the external water cooling device respectively. The waste heat utilization device cooperates with the preheating pipe, and the external water cooling device cooperates with the refrigeration pipe.

[0007] The outlet ends of the preheating pipe and the cooling pipe are both connected to the water supply pipe, to which the first branch pipe, the first check valve, the flow switch and the second branch pipe are connected in sequence, and the outlet end of the water supply pipe is connected to the water supply port of the internal water-cooled cooling pipe system;

[0008] The second main pipe is connected to the water supply main pipe, and the connection point between the two is arranged at the front side of the first branch pipe, and the second main pipe is connected to a third butterfly valve;

[0009] A frequency conversion operation device is also provided between the return water main and the water supply water main. An auxiliary water pump is provided in the frequency conversion operation device. The auxiliary water pump is a small-power frequency conversion pump, which is used to switch to a small frequency conversion pump operation when in standby mode to keep the water in the system flowing.

[0010] Furthermore, the waste heat utilization device includes a first heat exchange tube arranged in the HE plate exchanger, the first heat exchange tube cooperates with the preheating pipe, the inlet end of the first heat exchange tube is connected to the first heat exchange water inlet pipe, the first heat exchange water inlet pipe is connected to the primary water inlet in the waste heat utilization pipeline system, and is connected to a first solenoid valve, the outlet end of the first heat exchange tube is connected to the first heat exchange water outlet pipe, the first heat exchange water outlet pipe is connected to the primary water outlet in the waste heat utilization pipeline system, and the first heat exchange water outlet pipe is connected to the first heat exchange branch pipe, and the first heat exchange branch pipe is connected to the first ball valve.

[0011] Furthermore, the external water cooling device includes a second heat exchange tube arranged in the HE plate exchanger, the second heat exchange tube cooperates with the refrigeration pipeline, the inlet end of the second heat exchange tube is connected to the second heat exchange water inlet pipe, the second heat exchange water inlet pipe is connected to the second primary water inlet of the external water-cooling cooling pipeline system, and is connected to a second solenoid valve, the outlet end of the second heat exchange tube is connected to the second heat exchange water outlet pipe, the second heat exchange water outlet pipe is connected to the second primary water outlet of the external water-cooling cooling pipeline system, and the second heat exchange water outlet pipe is connected to a second heat exchange branch pipe, and the second heat exchange branch pipe is connected to a second ball valve.

[0012] Furthermore, the frequency conversion operation device includes a third main pipe connected to the return water main pipe, the connection point between the third main pipe and the return water main pipe is arranged on the front side of the first butterfly valve, and a pair of third ball valves and fourth ball valves connected in parallel are arranged on the third main pipe, followed by a first automatic exhaust valve, a second one-way valve, a third solenoid valve, a second filter, an auxiliary water pump, a third one-way valve and a fifth ball valve connected in series in sequence. The end of the third main pipe is connected to the water supply main pipe, and the connection point between the two is arranged between the first one-way valve and the flow switch.

[0013] Furthermore, a third branch pipe is connected to the third main pipe between the third solenoid valve and the second filter, the third branch pipe is connected to a water tank, the water tank is connected to the artificial filling port through a needle valve, and a fourth branch pipe is connected to the bottom of the water tank, the fourth branch pipe is connected to a sixth ball valve, and the third branch pipe is connected to a seventh ball valve, a fourth one-way valve, a fourth solenoid valve and an eighth ball valve in sequence, and the eighth ball valve is arranged close to one side of the third main pipe.

[0014] Furthermore, the first branch pipe is connected to a ninth ball valve, and the second branch pipe is sequentially connected to a tenth ball valve and a safety valve.

[0015] Furthermore, a first temperature measurement point and a first pressure measurement point are provided on the return water main, and the first temperature measurement point and the first pressure measurement point are arranged close to the return water port. A second temperature measurement point and a second pressure measurement point are provided on the water supply main, and the second temperature measurement point and the second pressure measurement point are arranged close to the water supply port. A third pressure measurement point is provided on the first stop valve, a fourth pressure measurement point is provided on the second stop valve, and a fifth pressure measurement point is provided on the third main between the first automatic exhaust valve and the second one-way valve.

[0016] Furthermore, the refrigeration pipeline is connected with a second automatic exhaust valve, and the second automatic exhaust valve is arranged close to the inlet end of the refrigeration pipeline entering the HE plate exchanger.

[0017] Furthermore, the water supply main pipe is connected with a third automatic exhaust valve, and the third automatic exhaust valve is arranged between the first branch pipe and the first one-way valve.

[0018] Compared with the prior art, the advantages of the technical solution of the utility model are specifically:

[0019] (1) The utility model adopts the configuration of a large pump + a small variable frequency pump. The large pump is operated during the battery charging and discharging period, and the small pump is operated at other times, so that the coolant in the system is always in a flowing state, which is beneficial to the heat dissipation of the battery in the system and can increase the service life of the battery;

[0020] (2) When the device of the utility model is in battery heating mode, it uses the waste heat of the power plant to provide the heat source, which saves energy and reduces consumption, and is environmentally friendly and efficient;

[0021] (3) The utility model is easy to operate and has a flexible structure, and can effectively reduce the energy consumption of the thermal management terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cycle path diagram of a general unit in operation in the prior art;

[0023] Figure 2 This is a schematic diagram of the structure of the energy-saving cooling water terminal device of the utility model;

[0024] Figure 3 It is a route map of the energy-saving cooling water terminal device of the utility model in refrigeration working condition;

[0025] Figure 4 It is a route map of the energy-saving cooling water terminal device of the utility model in the standby state;

[0026] Figure 5 It is a route map of the energy-saving cooling water terminal device of the utility model in heating condition. DETAILED DESCRIPTION Example

[0027] In order to make the present invention more clear, the energy-saving cooling water terminal device for a liquid-cooled energy storage system of the present invention is further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0028] See also Figure 2 , an energy-saving cooling water terminal device for a liquid-cooled energy storage system, comprising a return water inlet 2 and a water supply inlet 3 arranged in an internal water-cooled cooling pipe system 1, characterized in that:

[0029] The water return port 2 is connected to the water return main pipe 4, and the water return main pipe 4 is connected in sequence with a first butterfly valve 5, a first filter 6, a first stop valve 7, a main water pump 8, a second butterfly valve 9, a second stop valve 10 and a first electric three-way valve 11, and the first outlet of the first electric three-way valve 11 is connected to the first main pipe 12, and the second outlet is connected to the second main pipe 13;

[0030] The first main pipe 12 is connected to the inlet of the second electric three-way valve 14, the first outlet of the second electric three-way valve 14 is connected to the preheating pipe 15, and the second outlet is connected to the refrigeration pipe 16. The preheating pipe 15 and the refrigeration pipe 16 enter the HE plate exchanger 17 respectively. The HE plate exchanger 17 is also connected to the waste heat utilization device 18 and the external water cooling device 19 respectively. The waste heat utilization device 18 cooperates with the preheating pipe 15, and the external water cooling device 19 cooperates with the refrigeration pipe 16;

[0031] The waste heat utilization device 18 includes a first heat exchange tube 18a disposed in the HE plate exchanger 17, the first heat exchange tube 18a cooperates with the preheating pipe 15, the inlet end of the first heat exchange tube 18a is connected to the first heat exchange water inlet pipe 18b, the first heat exchange water inlet pipe 18b is connected to the primary water inlet 18c in the waste heat utilization pipeline system 180, and a first solenoid valve 18d is connected thereto, the outlet end of the first heat exchange tube 18a is connected to the first heat exchange water outlet pipe 18e, the first heat exchange water outlet pipe 18e is connected to the primary water outlet 18f in the waste heat utilization pipeline system 180, and the first heat exchange water outlet pipe 18e is connected to the first heat exchange branch pipe 18g, and the first heat exchange branch pipe 18g is connected to the first ball valve 18h;

[0032] The external water cooling device 19 includes a second heat exchange tube 19a disposed in the HE plate exchanger 17, the second heat exchange tube 19a cooperates with the refrigeration pipeline 16, the inlet end of the second heat exchange tube 19a is connected to the second heat exchange water inlet pipe 19b, the second heat exchange water inlet pipe 19b is connected to the second primary water inlet 19c of the external water cooling pipeline system 190, and a second solenoid valve 19d is connected thereto, the outlet end of the second heat exchange tube 19a is connected to the second heat exchange water outlet pipe 19e, the second heat exchange water outlet pipe 19e is connected to the second primary water outlet 19f of the external water cooling pipeline system 190, and the second heat exchange water outlet pipe 19e is connected to the second heat exchange branch pipe 19g, and the second heat exchange branch pipe 19g is connected to the second ball valve 19h;

[0033] The outlet ends of the preheating pipe 15 and the cooling pipe 16 are both connected to the water supply pipe 20, to which the first branch pipe 21, the first non-return valve 22, the flow switch 23 and the second branch pipe 24 are sequentially connected, the first branch pipe 21 is connected to the ninth ball valve 27, the second branch pipe 24 is sequentially connected to the tenth ball valve 28 and the safety valve 29, and the outlet end of the water supply pipe 20 is connected to the water supply port 3 of the internal water-cooled cooling pipe system 1;

[0034] The second main pipe 13 is connected to the water supply main pipe 20, and the connection point between the two is arranged at the front side of the first branch pipe 21. The second main pipe 13 is connected to a third butterfly valve 25.

[0035] See also Figure 2 and Figure 4 A frequency conversion operation device 26 is also provided between the return water main pipe 4 and the water supply main pipe 20. The frequency conversion operation device 26 includes a third main pipe 26a connected to the return water main pipe 4. The connection point between the third main pipe 26a and the return water main pipe 4 is arranged at the front side of the first butterfly valve 5. A pair of third ball valves 26b and fourth ball valves 26c connected in parallel are provided on the third main pipe 26a, followed by a first automatic exhaust valve 26d, a second one-way valve 26e, a third solenoid valve 26f, a second filter 26g, an auxiliary water pump 26h, a third one-way valve 26j and a fifth ball valve 26k connected in series in sequence. The auxiliary water pump 26h is a low-power frequency conversion pump. The end of the third main pipe 26a is connected to the water supply main pipe 20, and the connection point between the two is arranged between the first one-way valve 22 and the flow switch 23.

[0036] A third branch pipe 26m is connected to the third main pipe 26a between the third solenoid valve 26f and the second filter 26g, and the third branch pipe 26m is connected to the water tank 26n. The water tank 26n is connected to the artificial filling port 26q through a needle valve 26p. A fourth branch pipe 26r is also connected to the bottom of the water tank 26n. The fourth branch pipe 26r is connected to the sixth ball valve 26s. The third branch pipe 26m is connected in sequence with a seventh ball valve 26t, a fourth one-way valve 26v, a fourth solenoid valve 26w and an eighth ball valve 26x. The eighth ball valve 26x is arranged close to one side of the third main pipe 26a.

[0037] In this embodiment, a first temperature measuring point 30 and a first pressure measuring point 31 are provided on the return water main 4, and the first temperature measuring point 30 and the first pressure measuring point 31 are arranged close to the side of the return water port 2. A second temperature measuring point 32 and a second pressure measuring point 33 are provided on the water supply main 20, and the second temperature measuring point 32 and the second pressure measuring point 33 are arranged close to the side of the water supply port 3. A third pressure measuring point 34 is provided on the first stop valve 7, and a fourth pressure measuring point 35 is provided on the second stop valve 10. A fifth pressure measuring point 26y is provided on the third main between the first automatic exhaust valve 26d and the second one-way valve 26e, so as to perform temperature and pressure detection on the corresponding parts of the pipeline.

[0038] In this embodiment, a second automatic exhaust valve 36 is connected to the refrigeration pipe 16, and the second automatic exhaust valve 36 is arranged near the inlet end of the refrigeration pipe 16 entering the HE plate exchanger 17; a third automatic exhaust valve 37 is connected to the water supply main 20, and the third automatic exhaust valve 37 is arranged between the first branch pipe 21 and the first one-way valve 22.

[0039] See also Figure 3 In this embodiment, the energy-saving cooling water terminal device operates in the direction of the arrow shown in route I when in cooling condition, and exchanges heat with the external water cooling device 19 in the external water-cooling cooling pipe system 190 through the HE plate exchanger 17. After the heat exchange, the battery cabinet water supply temperature of the internal water-cooling cooling pipe system 1 is reduced, and the water temperature of the external water-cooling cooling pipe system 190 is increased from 10°C to 15°C.

[0040] See also Figure 4 In this embodiment, when the energy-saving cooling water terminal device is in standby mode, it switches to a small variable frequency pump operation, and proceeds in the direction of the arrow shown in route II, directly taking the route where the variable frequency operation device 26 is located, so as to keep the water in the system in a flowing state.

[0041] See also Figure 5 In this embodiment, the energy-saving cooling water terminal device operates in the direction of the arrow shown in route I during the preheating condition, and exchanges heat with the waste heat utilization device 18 in the waste heat utilization pipeline system 180 through the HE plate exchanger 17. After the heat exchange, the water supply temperature of the battery cabinet in the internal water-cooled cooling pipeline system 1 is reduced, and the water temperature of the waste heat utilization pipeline system 180 drops from 60°C to 40°C.

[0042] The utility model adopts the configuration of a large pump + a small variable frequency pump. The large pump runs during the battery charging and discharging period, and the small pump runs at other times, so that the coolant in the system is always in a flowing state, which is beneficial to the heat dissipation of the battery in the system and can increase the service life of the battery. At the same time, when the device is in the battery heating condition, the waste heat of the power plant is used to provide a heat source, which saves energy and reduces consumption, is environmentally friendly and efficient.

[0043] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. An energy-saving cooling water terminal device for a liquid-cooled energy storage system, comprising a water return port (2) and a water supply port (3) arranged in an internal water-cooled cooling pipe system (1), characterized in that: The water return port (2) is connected to a water return main pipe (4), and the water return main pipe (4) is connected in sequence to a first butterfly valve (5), a first filter (6), a first stop valve (7), a main water pump (8), a second butterfly valve (9), a second stop valve (10) and a first electric three-way valve (11), and a first outlet of the first electric three-way valve (11) is connected to a first main pipe (12), and a second outlet is connected to a second main pipe (13); The first main pipe (12) is connected to the inlet of the second electric three-way valve (14); the first outlet of the second electric three-way valve (14) is connected to the preheating pipe (15), and the second outlet is connected to the refrigeration pipe (16); the preheating pipe (15) and the refrigeration pipe (16) respectively enter the HE plate exchanger (17); the HE plate exchanger (17) is also connected to the waste heat utilization device (18) and the external water cooling device (19) respectively; the waste heat utilization device (18) cooperates with the preheating pipe (15), and the external water cooling device (19) cooperates with the refrigeration pipe (16); The outlet ends of the preheating pipe (15) and the cooling pipe (16) are both connected to a water supply pipe (20), to which a first branch pipe (21), a first non-return valve (22), a flow switch (23) and a second branch pipe (24) are sequentially connected, and the outlet end of the water supply pipe (20) is connected to a water supply port (3) of the internal water-cooled cooling pipe system (1); The second main pipe (13) is connected to the water supply main pipe (20), and the connection point between the two is arranged at the front side of the first branch pipe (21). The second main pipe (13) is connected to a third butterfly valve (25); A variable frequency operation device (26) is also provided between the return water main (4) and the water supply main (20), and an auxiliary water pump (26h) is provided in the variable frequency operation device (26).

2. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to claim 1, characterized in that: The waste heat utilization device (18) comprises a first heat exchange tube (18a) arranged in the HE plate exchanger (17), the first heat exchange tube (18a) cooperates with the preheating tube (15), the inlet end of the first heat exchange tube (18a) is connected to the first heat exchange water inlet pipe (18b), the first heat exchange water inlet pipe (18b) is connected to the primary water inlet (18c) in the waste heat utilization pipeline system (180), and a first solenoid valve (18d) is connected thereto, the outlet end of the first heat exchange tube (18a) is connected to the first heat exchange water outlet pipe (18e), the first heat exchange water outlet pipe (18e) is connected to the primary water outlet (18f) in the waste heat utilization pipeline system (180), the first heat exchange water outlet pipe (18e) is connected to the first heat exchange branch pipe (18g), and the first heat exchange branch pipe (18g) is connected to the first ball valve (18h).

3. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to claim 2 is characterized in that: The external water cooling device (19) comprises a second heat exchange tube (19a) arranged in the HE plate exchanger (17), the second heat exchange tube (19a) cooperates with the refrigeration pipeline (16), the inlet end of the second heat exchange tube (19a) is connected to the second heat exchange water inlet pipe (19b), the second heat exchange water inlet pipe (19b) is connected to the second primary water inlet (19c) of the external water cooling pipeline system (190), and a second solenoid valve (19d) is connected thereto, the outlet end of the second heat exchange tube (19a) is connected to the second heat exchange water outlet pipe (19e), the second heat exchange water outlet pipe (19e) is connected to the second primary water outlet (19f) of the external water cooling pipeline system (190), the second heat exchange water outlet pipe (19e) is connected to the second heat exchange branch pipe (19g), and the second heat exchange branch pipe (19g) is connected to the second ball valve (19h).

4. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to claim 3 is characterized in that: The variable frequency operation device (26) comprises a third main pipe (26a) connected to the return water main pipe (4); the connection point between the third main pipe (26a) and the return water main pipe (4) is arranged at the front side of the first butterfly valve (5); a pair of third ball valves (26b) and fourth ball valves (26c) connected in parallel are arranged on the third main pipe (26a); then, a first automatic exhaust valve (26d), a second one-way valve (26e), a third solenoid valve (26f), a second filter (26g), an auxiliary water pump (26h), a third one-way valve (26j) and a fifth ball valve (26k) are connected in series in sequence; the end of the third main pipe (26a) is connected to the water supply main pipe (20), and the connection point between the two is arranged between the first one-way valve (22) and the flow switch (23).

5. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to claim 4 is characterized in that: A third branch pipe (26m) is connected to the third main pipe (26a) between the third solenoid valve (26f) and the second filter (26g), the third branch pipe (26m) is connected to a water tank (26n), the water tank (26n) is connected to an artificial filling port (26q) via a needle valve (26p), a fourth branch pipe (26r) is connected to the bottom of the water tank (26n), a sixth ball valve (26s) is connected to the fourth branch pipe (26r), a seventh ball valve (26t), a fourth check valve (26v), a fourth solenoid valve (26w) and an eighth ball valve (26x) are connected to the third branch pipe (26m) in sequence, and the eighth ball valve (26x) is arranged close to one side of the third main pipe (26a).

6. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to any one of claims 1 to 5, characterized in that: The first branch pipe (21) is connected to a ninth ball valve (27), and the second branch pipe (24) is connected to a tenth ball valve (28) and a safety valve (29) in sequence.

7. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to claim 4, characterized in that: The return water main pipe (4) is provided with a first temperature measurement point (30) and a first pressure measurement point (31), the first temperature measurement point (30) and the first pressure measurement point (31) being arranged close to the return water port (2); the water supply main pipe (20) is provided with a second temperature measurement point (32) and a second pressure measurement point (33), the second temperature measurement point (32) and the second pressure measurement point (33) being arranged close to the water supply port (3); the first stop valve (7) is provided with a third pressure measurement point (34), the second stop valve (10) is provided with a fourth pressure measurement point (35), and the third main pipe (26a) between the first automatic exhaust valve (26d) and the second one-way valve (26e) is provided with a fifth pressure measurement point (26y).

8. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to any one of claims 1 to 5, characterized in that: The refrigeration pipeline (16) is connected to a second automatic exhaust valve (36), and the second automatic exhaust valve (36) is arranged close to the inlet end of the refrigeration pipeline (16) entering the HE plate exchanger (17).

9. The energy-saving cooling water terminal device for a liquid-cooled energy storage system according to any one of claims 1 to 5, characterized in that: The water supply main pipe (20) is connected to a third automatic exhaust valve (37), and the third automatic exhaust valve (37) is arranged between the first branch pipe (21) and the first one-way valve (22).

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