Energy storage liquid cooling unit long operation condition simulation device

Abstract

An energy storage liquid cooling unit long operation condition simulation device comprises a water collecting tank, a heater set and a liquid supplementing pipeline, the water collecting tank is provided with an inlet, an outlet, a liquid supplementing opening and a water filling opening, the inlet of the water collecting tank is communicated with a liquid outlet of an energy storage liquid cooling unit through a first pipeline, and the outlet of the water collecting tank is communicated with a liquid inlet of the energy storage liquid cooling unit through a second pipeline; the liquid supplementing pipeline is communicated to the liquid supplementing opening, the heater set is arranged in the water collecting tank, the first pipeline is provided with a water inlet valve, the second pipeline is provided with a water outlet valve, and the liquid supplementing pipeline is provided with a liquid supplementing valve. According to the scheme, the cooling medium is injected into the water collection tank through the water injection port, the cooling medium in the water collection tank is heated through the heater set, the temperature rising condition after the cooling medium flows through the lithium battery energy storage system is simulated, and then the cooling medium flows to the liquid inlet of the energy storage liquid cooling unit from the water collection outlet; after being cooled by the energy storage liquid cooling unit, the liquid flows back to the inlet of the water collecting tank from the liquid outlet to form circulation, so that working condition simulation of the energy storage liquid cooling unit during long-time operation can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical energy storage temperature control, and in particular to a long-term operation condition simulation device for an energy storage liquid cooling unit. Background Art

[0002] Electrochemical energy storage is the process of storing, releasing and managing energy through batteries. This energy storage method has flexible rated power and storage capacity, and has been widely used in new energy consumption, peak-valley price difference arbitrage, power system peak and frequency regulation and other fields. Electrochemical energy storage technologies mainly include lithium-ion batteries, sodium-ion batteries, lead-carbon batteries, etc., among which lithium-ion batteries are the mainstream in the current market. Relevant data show that among new energy storage, the cumulative installed capacity of lithium-ion batteries accounts for 89.7%, which is the most widely used new energy storage technology.

[0003] Since lithium batteries have strict requirements on operating temperature, they need to be equipped with corresponding electrochemical energy storage temperature control systems. Electrochemical energy storage temperature control systems come in various forms. Taking the energy storage liquid cooling unit as an example, the energy storage liquid cooling unit has a liquid inlet and a liquid outlet. The cooling medium flows into the energy storage liquid cooling unit from the liquid inlet for cooling, and then flows out from the liquid outlet to the lithium battery energy storage system to achieve temperature regulation. Since the electrochemical energy storage temperature control system plays an important role in maintaining the normal operation of lithium batteries, the reliability of the energy storage liquid cooling unit during long-term operation is crucial and needs to be tested and verified. Utility Model Content

[0004] The utility model aims to provide a simulation device capable of testing and verifying the reliability of an energy storage liquid cooling unit during long-term operation.

[0005] To solve the above problems, the utility model provides a long-term operation condition simulation device for an energy storage liquid cooling unit, including a water collecting tank, a heater group and a liquid replenishment pipeline, the water collecting tank having an inlet, an outlet, a liquid replenishment port and a water injection port located on the upper side, the inlet of the water collecting tank is connected to the liquid outlet of the energy storage liquid cooling unit through a first pipeline, and the outlet is connected to the liquid inlet of the energy storage liquid cooling unit through a second pipeline, the liquid replenishment pipeline is connected to the liquid replenishment port, the heater group is arranged inside the water collecting tank, the first pipeline is provided with an inlet valve for controlling the flow rate, the second pipeline is provided with a water outlet valve for controlling the flow rate, and the liquid replenishment pipeline is provided with a liquid replenishment valve for controlling the flow rate.

[0006] Compared with the prior art, the above scheme injects cooling medium into the water collecting tank through the water injection port, heats the cooling medium in the water collecting tank through the heater group, and simulates the temperature rise of the cooling medium after flowing through the lithium battery energy storage system. Subsequently, the cooling medium flows from the outlet of the water collecting tank to the liquid inlet of the energy storage liquid cooling unit, and then flows back from the liquid outlet to the inlet of the water collecting tank to form a cycle after being cooled by the energy storage liquid cooling unit, thereby realizing the working condition simulation of the energy storage liquid cooling unit during long-term operation; in addition, by arranging a liquid replenishment port in the water collecting tank, when the energy storage liquid cooling unit leaks or is mixed with gas, the liquid replenishment port replenishes the cooling medium to the energy storage liquid cooling unit through the liquid replenishment pipeline, thereby ensuring the flow stability of the cooling medium in the energy storage liquid cooling unit.

[0007] In an improved solution, the water collecting tank has a first side wall and a second side wall which are vertically opposite to each other, the inlet is located at the upper part of the first side wall, the outlet is located at the lower part of the second side wall, and the heater group is connected to the middle part of the second side wall in the height direction, so that the cooling medium with a lower temperature flowing in from the inlet will flow downward and be heated by the heater group, and then flow out from the outlet, ensuring that the flow of the cooling medium in the water collecting tank is more stable.

[0008] In an improved solution, the heater group extends laterally toward the first side wall, and a gap is left between the heater group and the first side wall for the medium to flow through; the liquid replenishment port is located at the lower part of the first side wall so as to be opposite to the outlet, thereby ensuring that the cooling medium flowing into the water collecting tank from the inlet is also heated by the heater group and then flows from the liquid replenishment port to the liquid replenishment pipeline.

[0009] In an improved solution, the water collecting tank is filled with a mixed solution of water and ethylene glycol, that is, the mixed solution of water and ethylene glycol is used as the cooling medium, which is more practical.

[0010] In an improved solution, a liquid level sight glass arranged vertically is provided in the water collecting tank, so as to facilitate monitoring of the liquid level in the water collecting tank and determine whether to add cooling medium to the water collecting tank through the water injection port.

[0011] In an improved solution, the first pipeline is provided with a flow meter so that the flow rate of the cooling medium can be obtained in real time.

[0012] In an improved solution, the water inlet valve, the water outlet valve and the liquid replenishing valve are all ball valves, which have a simple and stable structure and are easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a device for simulating long-term operation conditions of an energy storage liquid-cooled unit.

[0014] Description of reference numerals:

[0015] 1. Water collecting tank; 11. Inlet; 12. Outlet; 13. Liquid replenishment port; 14. Water injection port; 2. Heater group; 3. Liquid replenishment pipeline; 31. Liquid replenishment valve; 4. First pipeline; 41. Water inlet valve; 42. Flow meter; 5. Second pipeline; 51. Water outlet valve; 6. Liquid level sight glass; 101. Liquid inlet; 102. Liquid outlet. DETAILED DESCRIPTION

[0016] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may make adjustments to them as needed to adapt to specific application scenarios.

[0017] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0018] In the embodiments of the present application, 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.

[0019] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] See also Figure 1 An embodiment of the utility model provides a long-term operation condition simulation device for an energy storage liquid cooling unit, comprising a water collecting tank 1, a heater group 2 and a liquid replenishment pipeline 3. The water collecting tank 1 has an inlet 11, an outlet 12, a liquid replenishment port 13 and a water injection port 14 located on the upper side. The inlet 11 of the water collecting tank 1 is connected to the liquid outlet 102 of the energy storage liquid cooling unit through a first pipeline 4, and the outlet 12 is connected to the liquid inlet 101 of the energy storage liquid cooling unit through a second pipeline 5. The liquid replenishment pipeline 3 is connected to the liquid replenishment port 13. The heater group 2 is arranged inside the water collecting tank 1. The first pipeline 4 is provided with a water inlet valve 41 for controlling the flow rate, the second pipeline 5 is provided with a water outlet valve 51 for controlling the flow rate, and the liquid replenishment pipeline 3 is provided with a liquid replenishment valve 31 for controlling the flow rate.

[0021] The above scheme injects cooling medium into the water collecting tank 1 through the water injection port 14, heats the cooling medium in the water collecting tank 1 through the heater group 2, and simulates the temperature rise of the cooling medium after flowing through the lithium battery energy storage system. Then the cooling medium flows from the water collecting outlet 12 to the liquid inlet 101 of the energy storage liquid cooling unit, and then flows back to the inlet 11 of the water collecting tank 1 from the liquid outlet 102 after being cooled by the energy storage liquid cooling unit to form a cycle, thereby being able to realize the working condition simulation of the energy storage liquid cooling unit during long-term operation; in addition, the energy storage liquid cooling unit is equipped with a liquid replenishing interface. By setting a liquid replenishing port 13 in the water collecting tank 1, when the energy storage liquid cooling unit leaks or is mixed with gas, the liquid replenishing port 13 replenishes the cooling medium to the liquid replenishing interface of the energy storage liquid cooling unit through the liquid replenishing pipeline 3, thereby ensuring the flow stability of the cooling medium in the energy storage liquid cooling unit.

[0022] In this embodiment, the water collecting box 1 has a first side wall and a second side wall which are vertically opposite to each other. Figure 1 As a reference, the first side wall is the left side of the water collecting tank 1, the second side wall is the right side of the water collecting tank 1, the inlet 11 is located at the upper part of the first side wall, the outlet 12 is located at the lower part of the second side wall, and the heater group 2 is connected to the middle part of the second side wall along the height direction, so that the cooling medium with a lower temperature flowing in from the inlet 11 will flow downward and be heated by the heater group 2, and then flow out from the outlet 12, ensuring that the flow of the cooling medium in the water collecting tank 1 is more stable.

[0023] More specifically, in the present embodiment, the heater group 2 extends laterally toward the first side wall, and a gap is left between the heater group 2 and the first side wall for the medium to flow through; the liquid replenishment port 13 is located at the lower part of the first side wall so as to be opposite to the outlet 12, thereby ensuring that the cooling medium flowing into the water collecting tank 1 from the inlet 11 is also heated by the heater group 2 and then flows from the liquid replenishment port 13 to the liquid replenishment pipeline 3.

[0024] In this embodiment, the water collecting tank 1 is filled with a mixed solution of water and ethylene glycol, that is, the mixed solution of water and ethylene glycol is used as the cooling medium, which is more practical.

[0025] As an improvement to the present embodiment, a liquid level sight glass 6 arranged vertically is provided in the water collecting tank 1, so as to facilitate monitoring of the liquid level in the water collecting tank 1 and determine whether to add cooling medium to the water collecting tank 1 through the water injection port.

[0026] As another improvement to this embodiment, the first pipeline 4 is provided with a flow meter 42, so that the flow rate of the cooling medium can be obtained in real time.

[0027] In this embodiment, the water inlet valve 41, the water outlet valve 51 and the liquid replenishing valve 31 are all ball valves, which have a simple and stable structure and are easy to control; of course, the water inlet valve 41, the water outlet valve 51 and the liquid replenishing valve 31 can also be other forms of valve bodies, as long as they can control the on and off of the pipeline, without specific limitation.

[0028] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application. All directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. 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.

[0030] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A device for simulating long-term operation of an energy storage liquid cooling unit, characterized in that: The invention comprises a water collecting tank (1), a heater group (2) and a liquid replenishing pipeline (3); the water collecting tank (1) has an inlet (11), an outlet (12), a liquid replenishing port (13) and a water injection port (14) located on the upper side; the inlet (11) of the water collecting tank (1) is connected to a liquid outlet (102) of an energy storage liquid cooling unit through a first pipeline (4), and the outlet (12) is connected to a liquid inlet (101) of the energy storage liquid cooling unit through a second pipeline (5); the liquid replenishing port (13) is connected to the liquid replenishing pipeline (3) so as to replenish the energy storage liquid cooling unit through the liquid replenishing pipeline (3); the heater group (2) is arranged inside the water collecting tank (1); the first pipeline (4) is provided with a water inlet valve (41) for controlling the flow rate; the second pipeline (5) is provided with a water outlet valve (51) for controlling the flow rate; and the liquid replenishing pipeline (3) is provided with a liquid replenishing valve (31) for controlling the flow rate.

2. The long-term operation condition simulation device of the energy storage liquid cooling unit according to claim 1 is characterized in that: The water collecting box (1) has a first side wall and a second side wall which are vertically opposite to each other, the inlet (11) is located at the upper part of the first side wall, the outlet (12) is located at the lower part of the second side wall, and the heater group (2) is connected to the middle part of the second side wall in the height direction.

3. The long-term operation condition simulation device of the energy storage liquid cooling unit according to claim 2 is characterized in that: The heater group (2) extends laterally toward the first side wall, and a space for medium to flow through is left between the heater group (2) and the first side wall; the liquid replenishment port (13) is located at the lower part of the first side wall so as to be opposite to the outlet (12).

4. The long-term operation condition simulation device of the energy storage liquid cooling unit according to claim 1 is characterized in that: A liquid level sighting tube (6) arranged vertically is provided in the water collecting tank (1).

5. The long-term operation condition simulation device of the energy storage liquid cooling unit according to claim 1 is characterized in that: The first pipeline (4) is provided with a flow meter (42).

6. The long-term operation condition simulation device of the energy storage liquid cooling unit according to claim 1 is characterized in that: The water inlet valve (41), the water outlet valve (51) and the liquid replenishing valve (31) are all ball valves.

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