Cooling system of energy storage element

Abstract

The utility model relates to a cooling system of an energy storage element, which comprises a plurality of groups of liquid cooling plates arranged in parallel, a space between two adjacent groups of liquid cooling plates is used for accommodating the energy storage element, the surface of each liquid cooling plate is provided with a plurality of groups of flow channels, and ventilation holes are arranged between the adjacent flow channels; one ends of the flow channels are communicated, and the other ends of the flow channels are connected with a liquid cooling evaporator in the air cooling and liquid cooling unit through a liquid cooling liquid supply pipe and a liquid cooling liquid return pipe; and the ventilation holes are connected with an air-cooled evaporator in the air-cooled liquid-cooled unit through an air duct. The flow channels on the liquid cooling plate support the circulation working medium to flow, the ventilation holes between the flow channels support the air to flow, the liquid cooling plate is matched with the air cooling and liquid cooling unit with the two evaporators to form a liquid cooling and air cooling comprehensive cooling mode, and the energy consumption of the system can be effectively reduced while the energy storage element operates under the optimal operation working condition.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, specifically a cooling system for an energy storage element. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Lithium-ion batteries are often chosen as energy storage batteries. Energy storage cabinets formed by combining multiple lithium-ion batteries can meet various power supply needs. However, due to the uneven temperature distribution caused by the heat generated by the batteries, a thermal management system is used to control the battery temperature inside the energy storage cabinet.

[0004] Thermal management systems employ two methods to reduce battery temperature: air cooling and liquid cooling.

[0005] Air cooling is the most common cooling method, and its systems are simple in structure and low in cost. It typically relies on air conditioning components to deliver low-temperature gas to the battery for cooling. However, air cooling also has several drawbacks. First, air has a low convective heat transfer coefficient, resulting in low heat exchange efficiency between the air and the battery. Second, airflow characteristics vary at different locations within an energy storage station, leading to inconsistent heat dissipation and generally larger temperature differences between batteries under air cooling. The ideal operating temperature range for batteries is typically 288-308K, with a temperature difference ideally controlled within 5K. However, in practical engineering, using air-cooled thermal management, battery temperature differences can exceed 10K. When the battery temperature rises by 10K-15K, its lifespan decreases by 30%-50%.

[0006] Among liquid cooling methods, indirect contact liquid cooling is the most common in practical applications. Indirect contact liquid cooling systems mainly have three channel types: cold plate, discrete tube, and jacketed. Besides improving coolant performance, the cooling effect is mainly improved through optimization of pipe layout and channel structure. Cold plate channels can be broadly classified into parallel and serpentine designs. While liquid cooling systems offer good cooling performance, they can easily cause uneven heating and cooling between the upper and lower areas of the battery module, reducing battery efficiency and increasing system energy consumption. Furthermore, the refrigeration units supporting liquid cooling operation consume a significant amount of energy, resulting in a system efficiency reduction of approximately 8% to 10%, leading to substantial energy waste and hindering the widespread adoption of energy storage devices. Utility Model Content

[0007] To address the technical problems mentioned above, this utility model provides a cooling system for an energy storage element. A liquid cooling plate connected to the energy storage element has a flow channel on one side surface. The flow channel supports the flow of circulating working fluid, and the ventilation holes between the flow channels support air flow. Combined with an air-cooled and liquid-cooled unit with two evaporators, a combined liquid-cooled and air-cooled cooling method is formed, which can enable the battery to operate under optimal operating conditions while effectively reducing system energy consumption.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] This utility model provides a cooling system for an energy storage element, including multiple sets of liquid cooling plates arranged in parallel. The space between two adjacent sets of liquid cooling plates is used to accommodate the energy storage element. Multiple sets of flow channels are provided on the surface of the liquid cooling plates, and ventilation holes are provided between adjacent flow channels. One end of each flow channel is connected, and the other end is connected to the liquid-cooled evaporator in the air-cooled liquid-cooled unit through a liquid-cooled supply pipe and a liquid-cooled return pipe. The ventilation holes are connected to the air-cooled evaporator in the air-cooled liquid-cooled unit through air ducts.

[0010] Furthermore, the flow channels are arranged in parallel and divided into an inlet section and an outlet section. The inlet section has an inlet at one end and the outlet section has an outlet at one end. The other ends of the two flow channels are connected to form a U-shaped structure.

[0011] Furthermore, the inlet is connected to the liquid cooling supply pipe, and the outlet is connected to the liquid cooling return pipe. The circulating working fluid is sent into the liquid cooling plate through the liquid cooling supply pipe and the inlet. After flowing through the flow channel to cool the liquid cooling plate, it returns to the liquid cooling evaporator of the air-cooled liquid cooling unit through the outlet and the liquid cooling return pipe to be cooled again.

[0012] Furthermore, the ventilation holes are in multiple sets, and these sets of ventilation holes are evenly arranged in a direction parallel to the flow channel.

[0013] Furthermore, the air-cooled and liquid-cooled unit includes a compressor, a four-way reversing valve, an air-cooled condenser, and a two-way expansion valve connected in sequence by pipes. The two-way expansion valve is connected to the air-cooled evaporator and the liquid-cooled evaporator by pipes respectively. The air-cooled evaporator and the liquid-cooled evaporator are connected to the four-way reversing valve by pipes.

[0014] Furthermore, the bidirectional expansion valve is connected to the first control valve via a pipeline, the first control valve is connected to the air-cooled evaporator and the liquid-cooled evaporator via pipelines respectively, the air-cooled evaporator and the liquid-cooled evaporator are connected to the second control valve via pipelines, and the second control valve is connected to the four-way reversing valve via pipelines.

[0015] Furthermore, it also has a bracket for fixing the liquid cooling plate, energy storage components, air-cooled liquid cooling unit and air duct. The air duct includes a fresh air duct, a supply air duct and an exhaust air duct. The fresh air duct connects the fresh air unit and the fresh air outlet, the supply air duct connects the supply air unit and the supply air valve, and the exhaust air duct connects the exhaust air valve and the exhaust outlet.

[0016] Furthermore, under natural cooling conditions, outdoor air is driven by the fresh air unit, passing through the fresh air inlet and fresh air duct and then through the liquid cooling plate to cool the energy storage components. The air that has absorbed heat is discharged through the exhaust duct, exhaust valve and exhaust outlet.

[0017] Furthermore, in air-cooled mode, outdoor air is driven by the air supply unit and enters the air-cooled liquid chiller through the fresh air inlet, fresh air duct, and air supply duct. The air-cooled condenser of the air-cooled liquid chiller cools the air. The cooled air passes through the liquid cooling plate to cool the energy storage elements. The air that has absorbed heat is discharged through the exhaust duct, exhaust valve, and exhaust port.

[0018] Furthermore, in liquid-cooled mode, a refrigeration cycle is formed by the compressor, air-cooled condenser, bidirectional expansion valve and liquid-cooled evaporator in the air-cooled liquid-cooled unit. The liquid-cooled evaporator is used to cool the circulating working fluid, and the cooled circulating working fluid is cooled by the liquid-cooled plate to cool the energy storage element.

[0019] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0020] 1. One side of the liquid cooling plate is attached to the battery, and the flow channel on the other side supports the flow of circulating working fluid. The ventilation holes between the flow channels allow air to flow through. Together with the air-cooled and liquid-cooled unit with two evaporators, it forms a liquid-cooled and air-cooled integrated cooling method, which can enable the battery to operate under the best operating conditions while effectively reducing system energy consumption.

[0021] 2. The air-cooled and liquid-cooled units have air-cooled and liquid-cooled evaporators, which can switch to the appropriate evaporator operation according to different outdoor ambient temperatures, to cope with different working environments and ensure the thermal management efficiency of energy storage components in the safest way possible. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] Figure 1 This is a schematic diagram of the front structure of the air-cooled and liquid-cooled integrated machine provided by this utility model;

[0024] Figure 2 This is a schematic diagram of the rear structure of the air-cooled and liquid-cooled integrated machine provided by this utility model;

[0025] Figure 3 This is a side view of the air-cooled and liquid-cooled integrated machine provided by this utility model;

[0026] Figure 4 This is a schematic diagram of the principle of the air-cooled and liquid-cooled integrated machine provided by this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the liquid cooling plate provided by this utility model;

[0028] Figure 6 This is a front structural diagram of the liquid cooling plate provided by this utility model.

[0029] Figures 1-3 In the middle: 1. Liquid cooling supply pipe, 2. Exhaust air duct, 3. Air-cooled liquid cooling unit, 4. Air supply duct, 5. Fresh air duct, 6. Liquid cooling return pipe, 7. Liquid cooling plate, 8. Air-cooled air inlet, 9. Exhaust air valve, 10. Air supply unit, 11. Air supply valve, 12. Fresh air unit, 13. Exhaust air outlet, 14. Fresh air outlet;

[0030] Figure 4 In the middle: 31 Compressor, 32 Four-way reversing valve, 33 Air-cooled condenser, 34 Two-way expansion valve, 35 Air-cooled evaporator, 36 Liquid-cooled evaporator, 37 First control valve, 38 Second control valve;

[0031] Figures 5-6 In the middle: 71 liquid inlet, 72 liquid outlet, 73 flow channel, 74 ventilation hole. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] The following embodiments provide a cooling system for energy storage components, which adopts a combined liquid-cooling and air-cooling cooling method. This allows the battery to operate under optimal conditions while effectively reducing system energy consumption and improving system safety, thus greatly reducing the risk of thermal runaway in energy storage devices.

[0036] A cooling system for an energy storage element includes multiple sets of liquid cooling plates arranged in parallel. The space between two adjacent sets of liquid cooling plates is used to accommodate the energy storage element. Multiple sets of flow channels are provided on the surface of the liquid cooling plates, and ventilation holes are provided between adjacent flow channels. One end of each flow channel is connected, and the other end is connected to the liquid-cooled evaporator in an air-cooled liquid-cooled unit through a liquid-cooled supply pipe and a liquid-cooled return pipe.

[0037] In this embodiment, the energy storage element, together with the liquid cooling plate and the corresponding air-cooled liquid cooling unit, fresh air unit, air supply unit, air duct, and liquid cooling supply and return pipes, are installed on the bracket. After the outer shell is added, an air-cooled liquid cooling integrated machine is formed. Taking the "air-cooled liquid cooling integrated machine" as the energy storage element cooling system proposed in this solution as an example, the specific structure and principle are explained.

[0038] The front structure of the air-cooled and liquid-cooled integrated machine is as follows Figure 1 As shown, the device includes an outer shell, the interior of which is divided into two longitudinally spaced spaces of different volumes by a support frame. The larger space is space a, and the smaller space is space b. Space a contains multiple sets of liquid-cooled plates 7 arranged in parallel. The space between two adjacent sets of liquid-cooled plates 7 accommodates energy storage elements. Each set of energy storage elements is attached to the upper and / or lower liquid-cooled plates 7. The top of space b is equipped with a liquid-cooled supply pipe 1, a liquid-cooled return pipe 6, and an exhaust duct 2. The middle of space b is equipped with an air-cooled liquid-cooled unit 3 and an air supply duct 4. The bottom of space b is equipped with a fresh air duct 5.

[0039] The rear structure of the air-cooled and liquid-cooled integrated machine is as follows Figure 2 As shown, it includes an exhaust air valve 9 arranged at the top of space b, an air supply unit 10 and an air-cooled air inlet 8 arranged in the middle of space b, and an air supply valve 11 and a fresh air unit 12 arranged at the bottom of space b.

[0040] The side structure of the air-cooled and liquid-cooled integrated machine is as follows Figure 2 As shown, it includes an exhaust vent 13 located near the top of the housing and a fresh air vent 14 located near the bottom of the housing.

[0041] As a further embodiment, the air supply unit 10 and the fresh air unit 12 are used to supply air into the air-cooled liquid-cooled unit 3 by providing power through the fan. The specific structural form is not limited, for example, it has a fan and an air valve.

[0042] During the transitional season (generally in spring and autumn), the cooling capacity of the outdoor air is sufficient to meet the thermal management requirements of the battery. Therefore, the fresh air unit 12 is used to send outdoor air into the air-cooled and liquid-cooled integrated unit to cool the battery.

[0043] Specifically: the fresh air unit 12 is turned on, the exhaust air valve 9 is turned on, the air supply unit 10 is turned off, and the outdoor air enters the air-cooled and liquid-cooled integrated unit through the fresh air inlet 14, enters the liquid cooling plate 7 through the fresh air duct 5 to cool the battery, and the air that has absorbed heat is discharged through the exhaust air duct 2, the exhaust air valve 9 and the exhaust outlet 13.

[0044] In early summer, as outdoor temperatures rise, the cooling capacity of the outside air itself is no longer sufficient to meet the thermal management needs of the battery. Therefore, the fresh air unit 12, the air supply unit 10, and the air-cooled liquid cooling unit 3 work together to cool the outside air after it has been cooled by the air-cooled liquid cooling unit 3 and then sent into the air-cooled liquid cooling integrated unit to cool the battery.

[0045] Specifically: When the battery temperature exceeds the first set temperature, the fresh air unit 12 and the exhaust air valve 9 are opened, the air supply unit 10 and the air supply valve 11 are opened, and the air-cooled liquid cooling unit 3 is started. Outdoor air enters the air-cooled liquid cooling unit through the fresh air inlet 14, and enters the air-cooled liquid cooling unit 3 through the fresh air duct 5 and the air supply duct 4. The air is cooled by the air-cooled condenser 33 of the air-cooled liquid cooling unit 3. The cooled air enters the liquid cooling plate 7 to cool the battery. The air that has absorbed heat is discharged through the exhaust air duct 2, the exhaust air valve 9 and the exhaust port 13.

[0046] When the weather is hot in summer, the temperature of the outdoor air may be higher than the temperature required for the normal operation of the battery. At this time, the outside air can no longer be used as a cooling medium. Therefore, the interface connecting the air-cooled liquid-cooled unit to the outside air is closed to prevent hot air from the outside environment from entering the air-cooled liquid-cooled unit and interfering with the thermal management of the battery. The liquid working fluid provided by the air-cooled liquid unit 3 is used to cool the circulating working fluid, and then the cooled circulating working fluid is sent to the liquid cooling plate 7 to cool the battery.

[0047] Specifically: when the battery temperature exceeds the second set temperature, the fresh air unit 12 is shut down, the exhaust air valve 9 is shut down, the air supply unit 10 and the air supply valve 11 are shut down, the air-cooled liquid-cooled unit 3 is started, and the liquid-cooled evaporator in the air-cooled liquid-cooled unit 3 is used to cool the circulating working fluid. The cooled circulating working fluid is then cooled by the liquid cooling plate 7.

[0048] In this embodiment, the liquid cooling plate 7 is in close contact with the battery, and the flow channel therein contains a circulating working fluid. The circulating working fluid is used to reduce the temperature of the liquid cooling plate 7, thereby indirectly reducing the battery temperature. The circulating working fluid, after absorbing heat, is cooled again by the liquid cooling evaporator in the air-cooled liquid cooling unit 3.

[0049] In this embodiment, the coordination between the fresh air duct 5, the supply air duct 4, and the exhaust air duct 2 and the liquid cooling plate is not limited. It can be ensured that outside air passes through the ventilation holes on the liquid cooling plate 7 via the fresh air duct 5, or through the air-cooled condenser of the air-cooled liquid-cooled unit 3 via the supply air duct 4, and then enters the exhaust air duct 2. Specific structural forms and connection methods are not limited. A common approach is provided: the liquid cooling plate is located between two energy storage elements, and the fit between the flow channel and the energy storage elements forms a closed space for the circulating working fluid. After air enters the gap between the two energy storage elements, it passes through the ventilation holes to cool the liquid cooling plate, and the heat-absorbing air is discharged through the exhaust air duct 2.

[0050] The air-cooled and liquid-cooled chiller unit has three units with two evaporators (one liquid-cooled evaporator and one air-cooled evaporator). The liquid-cooled evaporator is connected to a liquid cooling plate, while the air-cooled evaporator is installed inside the integrated unit's air conditioning box. The liquid-cooled and air-cooled evaporators are controlled by three-way electromagnetic automatic control valves, allowing them to operate independently or in combination.

[0051] In this embodiment, the principle of the air-cooled liquid-cooled unit 3 is as follows: Figure 4 As shown, the system includes a compressor 31, a four-way reversing valve 32, an air-cooled condenser 33, and a two-way expansion valve 34 connected in sequence via pipes. The two-way expansion valve 34 is connected to a first control valve 37 via pipes. The first control valve 37 is connected to an air-cooled evaporator 35 and a liquid-cooled evaporator 36 via pipes. The air-cooled evaporator 35 and the liquid-cooled evaporator 36 are connected to a second control valve 38 via pipes. The second control valve 38 is connected to the four-way reversing valve 32 via pipes.

[0052] In this embodiment, the four-way reversing valve 32 has an inlet and an outlet a, an outlet b and an outlet c. The inlet and outlet b are both connected to the compressor 31 through pipes for the reflux of the liquid working fluid. The outlet a is connected to the second control valve 38 through a pipe, and the outlet c is connected to the air-cooled condenser 33 through a pipe.

[0053] In this embodiment, the liquid-cooled evaporator 36 is connected to the liquid-cooled plate 7 through the liquid-cooled supply pipe 1 and the liquid-cooled return pipe 6. The liquid-cooled evaporator 36 absorbs the temperature of the liquid working medium flowing through the liquid-cooled plate 7, so that the liquid working medium can circulate in the liquid-cooled plate 7 and reduce the loss of the liquid working medium.

[0054] In this embodiment, the air-cooled evaporator 35 is used to absorb heat from the air and reduce the temperature of the circulating air, thereby supporting the operation of the air-cooled section.

[0055] In this embodiment, the air-cooled condenser 33 is used to reduce the temperature of the liquid working fluid and to support the refrigeration cycle of the air-cooled liquid-cooled unit 3. The air-cooled condenser 33 is a common component and there are no restrictions on the specific structural type and arrangement. For example, the air-cooled condenser 33 can be arranged in the exhaust duct 2.

[0056] In this embodiment, the first control valve 37 and the second control valve 38 are used to switch whether the air-cooled evaporator 35 and the liquid-cooled evaporator 36 are involved in the circulation of the liquid working fluid. It is possible that both the air-cooled evaporator 35 and the liquid-cooled evaporator 36 participate in the circulation of the liquid working fluid, or either the air-cooled evaporator 35 or the liquid-cooled evaporator 36 participates in the circulation of the liquid working fluid. The specific switching situation depends on the heat load of the liquid cooling plate 7.

[0057] The working principle of the air-cooled liquid-cooled unit 3 is the same as that of a refrigeration / heating air conditioner. The compressor compresses the liquid working fluid, and according to the refrigeration / heating requirements, the four-way reversing valve switches different fluid passage paths to send the liquid working fluid into the air-cooled condenser or the air-cooled evaporator, thereby performing different cycles.

[0058] During refrigeration, the compressed high-temperature and high-pressure liquid working fluid is cooled to a normal temperature and high pressure state by the air-cooled condenser 33, and then changed to a low temperature and normal pressure state by the two-way expansion valve 34. It is then sent into the air-cooled evaporator 33 and / or the liquid-cooled evaporator 34 to absorb heat, and finally returned to the compressor 31 through the four-way reversing valve 32 for the next cycle.

[0059] During heating, the liquid working fluid first passes through two evaporators, exchanging heat with the circulating working fluid in the liquid cooling plate 7, and then returns to the compressor through the two-way expansion valve, the air-cooled condenser and the four-way reversing valve.

[0060] It should be noted that the air-cooled liquid-cooled unit 3 in this embodiment has both cooling and heating functions. However, in practice, the heating efficiency is usually lower than the cooling efficiency. Therefore, in most cases, the air-cooled liquid-cooled unit 3 performs a cooling cycle, with the aim of using two evaporators to reduce the temperature of the circulating working fluid in the liquid-cooled plate 7 and the temperature of the air passing through the liquid-cooled plate 7, respectively.

[0061] like Figures 5-6 As shown, the liquid cooling plate 7 has a U-shaped flow channel structure, including a flow channel 73 arranged on the surface of the liquid cooling plate 7, and the liquid inlet 71 and liquid outlet 72 of the flow channel 73 are located at the top of one side of the liquid cooling plate 7.

[0062] In this embodiment, the flow channels 73 have multiple sets arranged in parallel, all disposed on the front or back of the liquid cooling plate 7. Figure 1 Taking the reverse side as an example, multiple sets of parallel flow channels 73 are divided into liquid inlet and liquid outlet sections. One end of each flow channel is provided with a liquid inlet 71 and a liquid outlet 72, and the other end is connected. The two flow channels 73 form a U-shaped structure on the surface of the liquid cooling plate 7.

[0063] As a further implementation, the flow channels 73 of the liquid inlet section may be connected, not connected, or partially connected, and the flow channels 73 of the liquid outlet section may be connected, not connected, or partially connected, depending on the thermal load design of the battery. In this embodiment, the connected type is preferred.

[0064] As a further implementation, the width of the flow channel 73 corresponds to the position of the battery cell arranged on the liquid cooling plate 7. The flow channels 73 of both the liquid inlet and liquid outlet are divided into a set number of side flow channels and middle flow channels, and the width relationship between the middle flow channels and the side flow channels meets the set requirements.

[0065] For example, the flow channels 73 of both the liquid inlet and liquid outlet sections can be divided into two side flow channels and two middle flow channels. To ensure that the heat exchange of the cells is the same, for a 3-row cell, the width of the middle flow channel is half that of the side flow channels, and the two middle flow channels exchange heat with one row of cells; if it is a 4-row cell, the width of the middle flow channel is the same as that of the side flow channels, and each flow channel exchanges heat with one row of cells.

[0066] In this embodiment, the liquid inlet 71 of the liquid-cooled plate 7 is connected to the liquid cooling supply pipe 1, and the liquid outlet 72 is connected to the liquid cooling return pipe 6. The circulating working fluid is fed into the liquid-cooled plate 7 through the liquid cooling supply pipe 1 and the liquid inlet 71. After flowing through the flow channel 73 to cool the liquid-cooled plate 7, it returns to the liquid-cooled evaporator 34 of the air-cooled liquid-cooled unit 3 through the liquid outlet 72 and the liquid cooling return pipe 6 for further cooling. The liquid-cooled evaporator 34 is used to exchange heat in the circulating working fluid to the liquid working fluid. The liquid working fluid carries this heat through the subsequent compressor, air-cooled condenser, and expansion valve to achieve a refrigeration cycle.

[0067] Ventilation holes 74 are provided between two adjacent sets of flow channels 73. There are multiple sets of ventilation holes 74, which are arranged in parallel along the flow channels 73.

[0068] As a further implementation, the shape and size of the ventilation hole 74 are not limited, and it can be a round hole, a strip hole or an oblong hole. The ventilation hole 74 can be determined by simulation based on the fluid characteristics in the flow channel 73 to meet the optimal heat dissipation requirements.

[0069] When the liquid cooling plate is attached to the battery, the flow channel and the battery surface form a closed space for the circulation of working fluid. The ventilation holes between the flow channels support the flow of air. Together with the air-cooled and liquid-cooled unit 3 with two evaporators, a liquid-cooled and air-cooled integrated cooling method is formed, which can enable the battery to operate under the best operating conditions while effectively reducing system energy consumption. The cooling system reduces system efficiency by 3% to 5%.

[0070] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cooling system for an energy storage element, characterized in that, It includes multiple sets of liquid-cooled plates arranged in parallel, with the space between two adjacent sets of liquid-cooled plates used to accommodate energy storage elements. The surface of the liquid-cooled plates is provided with multiple sets of flow channels, and ventilation holes are provided between adjacent flow channels. One end of each flow channel is connected, and the other end is connected to the liquid-cooled evaporator in the air-cooled liquid-cooled unit through a liquid-cooled liquid supply pipe and a liquid-cooled liquid return pipe. The ventilation holes are connected to the air-cooled evaporator in the air-cooled liquid-cooled unit through air ducts.

2. The cooling system for an energy storage element as described in claim 1, characterized in that, The flow channels are arranged in parallel and are divided into an inlet section and an outlet section. The inlet section has an inlet at one end and the outlet section has an outlet at one end. The other ends of the two flow channels are connected to form a U-shaped structure.

3. The cooling system for an energy storage element as described in claim 2, characterized in that, The liquid inlet is connected to the liquid cooling supply pipe, and the liquid outlet is connected to the liquid cooling return pipe. The circulating working fluid is sent into the liquid cooling plate through the liquid cooling supply pipe and the liquid inlet. After flowing through the flow channel to cool the liquid cooling plate, it returns to the liquid cooling evaporator of the air-cooled liquid cooling unit through the liquid outlet and the liquid cooling return pipe to be cooled again.

4. The cooling system for an energy storage element as described in claim 1, characterized in that, The ventilation holes are in multiple sets, and the multiple sets of ventilation holes are evenly arranged along a direction parallel to the flow channel.

5. The cooling system for an energy storage element as described in claim 1, characterized in that, The air-cooled and liquid-cooled unit includes a compressor, a four-way reversing valve, an air-cooled condenser, and a two-way expansion valve connected in sequence by pipes. The two-way expansion valve is connected to the air-cooled evaporator and the liquid-cooled evaporator by pipes, and the air-cooled evaporator and the liquid-cooled evaporator are connected to the four-way reversing valve by pipes.

6. The cooling system for an energy storage element as described in claim 5, characterized in that, The bidirectional expansion valve is connected to the first control valve via a pipeline. The first control valve is connected to the air-cooled evaporator and the liquid-cooled evaporator via pipelines. The air-cooled evaporator and the liquid-cooled evaporator are connected to the second control valve via pipelines. The second control valve is connected to the four-way reversing valve via a pipeline.

7. The cooling system for an energy storage element as described in claim 1, characterized in that, It also has a bracket for fixing the liquid cooling plate, energy storage components, air-cooled liquid cooling unit and air duct. The air duct includes a fresh air duct, a supply air duct and an exhaust air duct. The fresh air duct connects the fresh air unit and the fresh air inlet. The supply air duct connects the supply air unit and the supply air valve. The exhaust air duct connects the exhaust air valve and the exhaust air outlet.

8. The cooling system for an energy storage element as described in claim 7, characterized in that, Under natural cooling conditions, outdoor air is driven by the fresh air unit, passes through the fresh air inlet and fresh air duct and passes through the liquid cooling plate to cool the energy storage element, and the air that has absorbed heat is discharged through the exhaust duct, exhaust valve and exhaust outlet.

9. The cooling system for an energy storage element as described in claim 7, characterized in that, In air-cooled mode, outdoor air is driven by the air supply unit and enters the air-cooled liquid chiller through the fresh air inlet, fresh air duct and air supply duct. The air-cooled condenser of the air-cooled liquid chiller cools the air. The cooled air passes through the liquid cooling plate to cool the energy storage element. The air that has absorbed heat is discharged through the exhaust duct, exhaust valve and exhaust port.

10. The cooling system for an energy storage element as described in claim 7, characterized in that, In liquid-cooled mode, a refrigeration cycle is formed by the compressor, air-cooled condenser, bidirectional expansion valve and liquid-cooled evaporator in the air-cooled liquid-cooled unit. The liquid-cooled evaporator is used to cool the circulating working fluid, and the cooled circulating working fluid is cooled by the liquid cooling plate to cool the energy storage element.

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