Energy storage device, energy storage system and charging network

Abstract

The utility model relates to the technical field of energy storage, and provides an energy storage device, an energy storage system and a charging network, the energy storage device comprises a battery device, a heat management module, a cold storage structure, a first multi-way valve and a second multi-way valve, the heat management module comprises a refrigeration assembly and a heat exchanger, and the heat exchanger comprises a first heat exchange part and a second heat exchange part; the refrigeration assembly is arranged between the first input end and the first output end of the first heat exchange part in series. A first valve port of the first multi-way valve is connected with the second output end, a second valve port is connected with the heat exchange inlet, a third valve port is connected with the cold accumulation inlet, a fourth valve port of the second multi-way valve is connected with the heat exchange outlet, a fifth valve port is connected with the second input end, and a sixth valve port is connected with the cold accumulation outlet; according to the energy storage device provided by the embodiment of the invention, the first multi-way valve and the second multi-way valve can distribute the cooling medium, so that the battery device can achieve a better heat dissipation effect in different working states, and the heat dissipation efficiency of the battery device can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage, and in particular provides an energy storage device, an energy storage system and a charging network. Background Art

[0002] New energy batteries are increasingly widely used in life and industries. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and so on.

[0003] The energy storage system is used as a supplement and backup system for the power grid. In the case of power grid fluctuations or power shortages, the energy storage system will operate at high power to balance the load of the power grid. And a large amount of heat will be generated when the energy storage system operates at high power, so a certain degree of cooling is required.

[0004] The energy storage system mainly cools the cooling medium by compression refrigeration of the thermal management module and provides it to the battery device for heat exchange and cooling; however, in different working states of the battery device, the heat generation of the battery device is different, and the adaptability of the thermal management module is poor, resulting in a low heat dissipation efficiency of the battery device. Summary of the Utility Model

[0005] The purpose of the embodiments of this application is to provide an energy storage device, an energy storage system and a charging network, aiming to solve the problem of low heat dissipation efficiency caused by the poor adaptability of the thermal management module to different working states of the battery device.

[0006] To achieve the above purpose, the technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, the embodiments of this application provide an energy storage device, including a battery device, a thermal management module, a cold storage structure, a first multi-way valve and a second multi-way valve; the battery device includes a heat exchange inlet and a heat exchange outlet, and the cold storage structure includes a cold storage inlet and a cold storage outlet; the thermal management module includes a refrigeration component and a heat exchanger, the heat exchanger includes a first heat exchange part and a second heat exchange part, the first heat exchange part includes a first input end and a first output end, and the second heat exchange part includes a second input end and a second output end; the refrigeration component is connected in series between the first input end and the first output end; the first multi-way valve includes a first valve port, a second valve port and a third valve port, the first valve port is connected to the second output end, the second valve port is connected to the heat exchange inlet, and the third valve port is connected to the cold storage inlet; the second multi-way valve includes a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port is connected to the heat exchange outlet, the fifth valve port is connected to the second input end, and the sixth valve port is connected to the cold storage outlet.

[0008] Advantages of the embodiments of the present application: The energy storage device provided by the embodiments of the present application can distribute the flow rate and flow path of the cooling medium by using the first multi-way valve and the second multi-way valve. When the battery device operates at a low rate, the heat generated by the battery device is relatively low. The first multi-way valve and the second multi-way valve can distribute the cooling medium into the cold storage structure to store cold energy. When the battery device operates at a high rate, the heat generated by the battery device is relatively high. The first multi-way valve and the second multi-way valve can distribute the cooling medium to the battery device for cooling, and the cooling medium stored in the cold storage structure can also be synchronously exported to assist in cooling, so that the battery device can achieve a better heat dissipation effect in different working states, thereby effectively improving the heat dissipation efficiency of the battery device.

[0009] In some embodiments, the refrigeration assembly includes a compressor, a fan, an air cooler, and a condenser. The air inlet end of the fan faces the air cooler, and the condenser and the compressor are connected in series between the first input end and the first output end; the air cooler includes an inlet end and an outlet end, and the outlet end is connected to the first valve port, and the inlet end is connected to the fifth valve port.

[0010] By adopting the above technical solution, the compressor and the condenser can compress and refrigerate the refrigeration medium and circulate it into the first heat exchange part for heat exchange refrigeration of the cooling medium in the second heat exchange part; at the same time, the air cooler uses the fan to naturally cool the cooling medium, which can cope with the situation when the battery device operates at a low rate, and can also effectively reduce the energy consumption of compression refrigeration.

[0011] In some embodiments, the condenser is arranged on the air cooler, the fan is arranged on the side of the condenser facing away from the air cooler, and the air inlet end of the fan faces the condenser.

[0012] By adopting the above technical solution, the fan, the condenser and the air cooler are integrally arranged, and the dry cold air in the environment is introduced by the fan to naturally cool the air cooler and the condenser in turn, which can effectively reduce the energy consumption of compression refrigeration.

[0013] In some embodiments, the inlet end is arranged at one end of the air cooler close to the condenser, and the outlet end is arranged at the other end of the air cooler facing away from the condenser.

[0014] By adopting the above technical solution, the dry cold air introduced by the fan flows from the side of the outlet end of the air cooler to the side of the inlet end of the air cooler and fully contacts the coil of the air cooler, so as to effectively ensure the temperature of the cooling medium exported from the outlet end of the air cooler.

[0015] In some embodiments, the energy storage device further includes a third multi-way valve disposed between the second multi-way valve, the input end, and the inlet end; the third multi-way valve includes a seventh valve port, an eighth valve port, and a ninth valve port, the seventh valve port is connected to the second input end, the eighth valve port is connected to the inlet end, and the ninth valve port is connected to the fifth valve port.

[0016] By adopting the above technical solution, the third multi-way valve can be used to distribute the cooling medium to the second heat exchange part or the air cooler to meet the refrigeration requirements of the cooling medium under different working states of the battery device.

[0017] In some embodiments, the energy storage device further includes a first circulation pump disposed between the second multi-way valve and the third multi-way valve.

[0018] By adopting the above technical solution, the use of the first circulation pump can effectively improve the fluidity of the cooling medium to further enhance the heat dissipation effect of heat exchange using the cooling medium.

[0019] In some embodiments, the energy storage device further includes a fourth multi-way valve disposed between the first multi-way valve, the second output end, and the outlet end; the fourth multi-way valve includes a tenth valve port, an eleventh valve port, and a twelfth valve port, the tenth valve port is connected to the second output end, the eleventh valve port is connected to the outlet end, and the twelfth valve port is connected to the first valve port.

[0020] By adopting the above technical solution, the fourth multi-way valve can also be used to select the cooling medium in the air cooler or the second heat exchange part for heat dissipation of the battery device or cold storage of the cold storage structure to meet the heat dissipation requirements of the battery device under different working states.

[0021] In some embodiments, the first multi-way valve further includes a thirteenth valve port connected to the fourth valve port.

[0022] By adopting the above technical solution, the first multi-way valve can also directly return the cooling medium derived from the air cooler or the second heat exchange part to the air cooler or the second heat exchange part to achieve the purpose of low-power circulating flow.

[0023] In some embodiments, the energy storage device further includes a second circulation pump disposed between the first multi-way valve and the cold storage inlet.

[0024] By adopting the above technical solution, the use of the second circulation pump can further improve the fluidity of the cooling medium to further enhance the smoothness of introducing the cooling medium into the cold storage structure.

[0025] In some embodiments, the energy storage device further includes a controller, a temperature sensor, a flow meter, and a pressure sensor; the controller is electrically connected to the first multi-way valve, the second multi-way valve, the third multi-way valve, the fourth multi-way valve, the first circulation pump, the second circulation pump, the temperature sensor, the flow meter, and the pressure sensor. The temperature sensor is used to monitor the temperatures of the battery device and the cooling medium, the flow meter is used to monitor the flow rate of the cooling medium, and the pressure sensor is used to monitor the pressure of the cooling medium.

[0026] By adopting the above technical solution, the temperature of the battery device, and the temperature, flow rate, and pressure of the cooling medium can be monitored by using the temperature sensor, the flow meter, and the pressure sensor, and the first multi-way valve, the second multi-way valve, the third multi-way valve, and the fourth multi-way valve can be automatically controlled by using the controller.

[0027] In some embodiments, the energy storage device further includes a cabinet body, the battery device, the refrigeration component, and the heat exchanger are arranged inside the cabinet body, and the cold storage structure is arranged outside the cabinet body.

[0028] By adopting the above technical solution, the cabinet body can cover and protect the battery device, the refrigeration component, and the heat exchanger. At the same time, placing the cold storage structure outside the cabinet body can reduce the occupation of the internal space of the cabinet body by the cold storage structure.

[0029] In some embodiments, the cold storage structure is buried under the cabinet body.

[0030] By adopting the above technical solution, when the cold storage structure is buried under the cabinet body, the heat preservation effect of the cold storage structure is better, and the influence of the cold storage structure on the space around the cabinet body is lower.

[0031] In a second aspect, an embodiment of the present application further provides an energy storage system, including a power conversion device and the energy storage device as described above. The power conversion device is used to electrically connect a power generation device and the energy storage device.

[0032] The beneficial effect of the embodiment of the present application: The energy storage system provided by the embodiment of the present application includes the above-mentioned energy storage device. Therefore, the heat dissipation efficiency of the energy storage system for the battery device is higher.

[0033] In a third aspect, an embodiment of the present application further provides a charging network, including a charging pile and the energy storage device or the energy storage system as described above. The energy storage device is used to provide electric energy for the charging pile.

[0034] The beneficial effect of the embodiment of the present application: The charging network provided by the embodiment of the present application includes the above-mentioned energy storage device or energy storage system. Therefore, the heat dissipation efficiency of the charging network is higher. Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for use in the embodiments or the description of related technologies. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0036] Figure 1 Structural schematic diagram of the energy storage device provided by the embodiment of the present application;

[0037] Figure 2 Connection schematic diagram of the first thermal management module, cold storage structure and battery device provided by the embodiment of the present application;

[0038] Figure 3 Connection schematic diagram of the second thermal management module, cold storage structure and battery device provided by the embodiment of the present application;

[0039] Figure 4 For Figure 3 Partial enlarged schematic diagram of point A of

[0040] Figure 5 Connection schematic diagram of the third thermal management module, cold storage structure and battery device provided by the embodiment of the present application;

[0041] Figure 6 For Figure 5 Partial enlarged schematic diagram of point B of

[0042] Figure 7 Structural schematic diagram of the energy storage system provided by the embodiment of the present application;

[0043] Figure 8 Structural schematic diagram of the charging network provided by the embodiment of the present application.

[0044] Among them, the reference numerals in the figure are as follows:

[0045] 1000, energy storage device;

[0046] 2000, energy storage system; 2100, power conversion device; 2200, power generation device;

[0047] 3000, charging network; 3100, charging pile; 3110, connector;

[0048] 100, cabinet;

[0049] 200, battery device; 201, heat exchange inlet; 202, heat exchange outlet;

[0050] 300, Thermal management module; 310, Refrigeration component; 311, Compressor; 312, Fan; 313, Dry cooler; 313a, Inlet end; 313b, Outlet end; 314, Condenser;

[0051] 320, Heat exchanger; 321a, First input end; 321b, First output end; 322a, Second input end; 322b, Second output end; 330, First circulation pump; 340, Second circulation pump;

[0052] 400, Cold storage structure; 401, Cold storage inlet; 402, Cold storage outlet;

[0053] 500, First multi-way valve; 501, First valve port; 502, Second valve port; 503, Third valve port; 504, Thirteenth valve port;

[0054] 600, Second multi-way valve; 601, Fourth valve port; 602, Fifth valve port; 603, Sixth valve port;

[0055] 700, Third multi-way valve; 701, Seventh valve port; 702, Eighth valve port; 703, Ninth valve port;

[0056] 800, Fourth multi-way valve; 801, Tenth valve port; 802, Eleventh valve port; 803, Twelfth valve port. Detailed implementation manners

[0057] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0059] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0060] In this application, unless otherwise clearly specified or limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the energy storage field, etc. The energy storage system is used as a supplement and backup system for the power grid. In the case of power grid fluctuations or power shortages, the energy storage system will operate at high power to balance the load of the power grid. However, when the energy storage system operates at high power, a large amount of heat will be generated, so a certain degree of cooling is required. The energy storage system mainly cools the cooling medium through the compression refrigeration of the thermal management module and provides it to the battery device for heat exchange and cooling; however, under different working states of the battery device, the heat generation of the battery device is different, and the adaptability of the thermal management module is poor, resulting in a low heat dissipation efficiency of the battery device.

[0062] Based on the above considerations, in order to solve the problem of poor adaptability of the thermal management module to different working states of the battery device, resulting in low heat dissipation efficiency, an energy storage device is designed. The first multi-way valve and the second multi-way valve are used to distribute the cooling medium. When the battery device operates at a high rate, the battery device generates a large amount of heat. The first multi-way valve and the second multi-way valve can conduct the second heat exchange part, the battery device and the cold storage structure, and use the cold stored in the second heat exchange part and the cold storage tank to cool the battery cells synchronously; when the battery device operates at a low rate, the battery device generates less heat. The first multi-way valve and the second multi-way valve can conduct the second heat exchange part and the cold storage structure, so that the cooling medium is introduced into the cold storage structure for storage; in this way, according to the heat generation of the battery device in different working states, the first multi-way valve and the second multi-way valve can distribute the cooling medium to different paths, so that the battery device can achieve better heat dissipation effects in different working states, thereby effectively improving the heat dissipation efficiency of the battery device.

[0063] The energy storage device disclosed in the embodiments of this application can be but is not limited to being used in fixed or mobile energy stations, such as energy storage containers, energy storage distribution cabinets, integrated charging and energy storage machines, energy storage power stations, battery swapping stations, etc.

[0064] Next, the energy storage device provided by the embodiments of this application will be introduced and described.

[0065] An embodiment of the present application provides an energy storage device, which includes one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0066] Among them, the battery device may include one or more battery cell components for providing voltage and capacity. The battery cell component may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0067] In some embodiments, the battery cell component is generally formed by arranging a plurality of battery cells.

[0068] As an example, the battery cell component may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0069] In some embodiments, the battery device may be a battery pack, and the battery pack includes a housing and one or more battery cell components, and the battery cell components are accommodated in the housing.

[0070] As an example, the battery cell component may be a battery module, and the battery cell component may be accommodated in the housing by fixing the battery module in the housing.

[0071] As an example, the battery cell component may also be accommodated in the housing by directly fixing a plurality of battery cells to the housing.

[0072] In the embodiment of the present application, the battery cell may be a secondary battery, which refers to a battery cell that can activate the active material through charging after discharging and can be used continuously.

[0073] The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiment of the present application does not limit this.

[0074] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption period and provide electrical energy to relevant users or electrical equipment during the high electricity consumption period. The energy storage system provided by the embodiment of the present application can be any power system that requires an energy storage device.

[0075] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0076] In some embodiments, the energy storage device may include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0077] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a total control module, a power distribution module, and a fire protection module.

[0078] As an example, the thermal management module may include a liquid cooling unit, and the liquid cooling unit provides coolant for adjusting the temperature of battery cells to each battery device through pipelines.

[0079] As an example, the main control module may serve as the battery management unit of the battery cluster and is used to monitor and manage the battery cluster. The main control module may monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, it can control the charge and discharge current, voltage, etc. of the battery cluster. The main control module includes an auxiliary battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch, and other modules.

[0080] As an example, the total control module may serve as the battery management unit of the energy storage device and is used to monitor and manage the energy storage device. The total control module may monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device. For example, it can control the charge and discharge current, voltage, etc. of the energy storage device. As an example, the total control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a main battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and a fiber optic conversion module, and other modules.

[0081] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., and is used to detect, alarm, or extinguish fires in the energy storage system.

[0082] As an example, the power distribution module can be used to distribute power to the modules that need electricity in the energy storage device.

[0083] Please refer to Figure 1 and Figure 2, an embodiment of the present application provides an energy storage device 1000, including a battery device 200, a thermal management module 300, a cold storage structure 400, a first multi-way valve 500, and a second multi-way valve 600; the battery device 200 includes a heat exchange inlet 201 and a heat exchange outlet 202, and the cold storage structure 400 includes a cold storage inlet 401 and a cold storage outlet 402; the thermal management module 300 includes a refrigeration component 310 and a heat exchanger 320, the heat exchanger 320 includes a first heat exchange part and a second heat exchange part (the first heat exchange part and the second heat exchange part are not shown in the figure), the first heat exchange part includes a first input end 321a and a first output end 321b, and the second heat exchange part includes a second input end 322a and a second output end 322b; the refrigeration component 310 is serially arranged between the first input end 321a and the first output end 321b; the first multi-way valve 500 includes a first valve port 501, a second valve port 502, and a third valve port 503, the first valve port 501 is connected to the second output end 322b, the second valve port 502 is connected to the heat exchange inlet 201, and the third valve port 503 is connected to the cold storage inlet 401; the second multi-way valve 600 includes a fourth valve port 601, a fifth valve port 602, and a sixth valve port 603, the fourth valve port 601 is connected to the heat exchange outlet 202, the fifth valve port 602 is connected to the second input end 322a, and the sixth valve port 603 is connected to the cold storage outlet 402.

[0084] The battery device 200 mentioned in the embodiment of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0085] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0086] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0087] In some embodiments, the battery device 200 may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0088] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0089] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0090] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled so that a closed space is formed inside the box body to accommodate the battery cell assembly. The "closed" here means covering or closing, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0091] As an example, the box body may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0092] Among them, the above-mentioned battery cell can be a secondary battery, which refers to a battery cell that can activate the active material and continue to be used by charging after discharging the battery cell.

[0093] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0094] The battery device 200 includes a heat exchange inlet 201 and a heat exchange outlet 202; wherein, the heat exchange inlet 201 is used for introducing a cooling medium so that the cooling medium can be introduced into the battery device 200 and flow in a specific flow channel to achieve the purpose of heat exchange and heat dissipation. Exemplarily, in some embodiments, the above-mentioned specific flow channel can be a liquid cooling flow channel integrated on the wall surface of the box body, etc. The heat exchange outlet 202 is used for discharging the cooling medium so that the overheated cooling medium formed by heat exchange in the battery device 200 is discharged outside the battery device 200.

[0095] The thermal management module 300 is used to circulate and provide a cooling medium. The thermal management module 300 includes a refrigeration component 310 and a heat exchanger 320. Among them, the refrigeration component 310 is used to circulate and refrigerate the refrigeration medium; the heat exchanger 320 includes a first heat exchange part and a second heat exchange part. The refrigeration component 310 refrigerates the refrigeration medium and introduces it into the first heat exchange part so that the refrigeration medium fully exchanges heat with the cooling medium in the second heat exchange part to achieve the purpose of refrigerating the cooling medium. In some embodiments, the heat exchanger 320 can be a plate heat exchanger, so that the first heat exchange part and the second heat exchange part are respectively a refrigeration medium flow channel and a cooling medium flow channel formed by separating metal plates.

[0096] The first heat exchange part includes a first input end 321a and a first output end 321b. The first input end 321a is used for introducing the refrigeration medium into the first heat exchange part, and the first output end 321b is used for discharging the refrigeration medium in the first heat exchange part to the outside. The refrigeration component 310 is serially arranged between the first input end 321a and the first output end 321b. Thus, the refrigeration component 310 refrigerates the refrigeration medium, and the refrigeration medium can be circulated and introduced into the first heat exchange part.

[0097] The second heat exchange part includes a second input end 322a and a second output end 322b. The second input end 322a is used to introduce a cooling medium into the second heat exchange part, and the second output end 322b is used to export the cooling medium in the second heat exchange part to the outside.

[0098] The first multi-way valve 500 is a valve device for fluid control. By rotating, pushing and pulling or other mechanical operation methods, the connection states of different channels in the valve body of the first multi-way valve 500 can be changed, that is, the opening and closing states of different valve ports of the first multi-way valve 500 are controlled, so as to realize the switching of the fluid flow path. Optionally, the first multi-way valve 500 can be a three-way valve, a four-way valve, etc.; in some embodiments, the first multi-way valve 500 can adopt an electromagnetic valve.

[0099] The first valve port 501 of the first multi-way valve 500 is connected to the second output end 322b, the second valve port 502 is connected to the heat exchange inlet 201, and the third valve port 503 is connected to the cold storage inlet 401. Thus, by controlling the on-off of the first multi-way valve 500, at least two of the second output end 322b, the heat exchange inlet 201 and the cold storage inlet 401 can be conducted.

[0100] The second multi-way valve 600 is a valve device for fluid control. By rotating, pushing and pulling or other mechanical operation methods, the connection states of different channels in the valve body of the second multi-way valve 600 can be changed, that is, the opening and closing states of different valve ports of the second multi-way valve 600 are controlled, so as to realize the switching of the fluid flow path. Optionally, the second multi-way valve 600 can be a three-way valve, a four-way valve, etc.; in some embodiments, the second multi-way valve 600 can adopt an electromagnetic valve.

[0101] The fourth valve port 601 of the first multi-way valve 500 is connected to the heat exchange outlet 202, the fifth valve port 602 is connected to the second input end 322a, and the sixth valve port 603 is connected to the cold storage outlet 402. Thus, by controlling the on-off of the second multi-way valve 600, at least two of the second input end 322a, the cold storage outlet 402 and the heat exchange outlet 202 can be conducted.

[0102] In this way, by controlling the on-off of the first multi-way valve 500 and the second multi-way valve 600, different circulation modes of the cooling medium among the cold storage structure 400, the battery device 200 and the second heat exchange part can be realized.

[0103] Exemplarily, in the first embodiment, when the first valve port 501 and the second valve port 502 of the first multi-way valve 500 are controlled to be opened and the third valve port 503 is closed, and the fourth valve port 601 and the fifth valve port 602 of the second multi-way valve 600 are controlled to be opened and the sixth valve port 603 is closed, the second heat exchange part is communicated with the battery device 200, and the second heat exchange part can circularly introduce a cooling medium into the battery device 200 to achieve heat dissipation.

[0104] Alternatively, in the second embodiment, when the first valve port 501 and the third valve port 503 of the first multi-way valve 500 are controlled to be opened and the second valve port 502 is closed, the second heat exchange part is communicated with the cold storage structure 400, and the second heat exchange part can introduce a cooling medium into the cold storage structure 400 to achieve the purpose of storing cold; at this time, the fourth valve port 601 and the sixth valve port 603 of the second multi-way valve 600 can be controlled to be opened and the fifth valve port 602 is closed, so that the cooling medium stored in the cold storage structure 400 continues to be introduced into the second heat exchange part for low-power cycle refrigeration; or the fourth valve port 601, the fifth valve port 602 and the sixth valve port 603 are controlled to be all closed, so that the cooling medium is completely introduced and stored in the cold storage structure 400.

[0105] Alternatively, in the third embodiment, when the second valve port 502 and the third valve port 503 of the first multi-way valve 500 are controlled to be opened and the first valve port 501 is closed, and the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 are controlled to be opened and the fourth valve port 601 is closed, the cooling medium can circulate between the battery device 200 and the cold storage structure 400, that is, the cooling medium stored in the cold storage structure 400 is used to cool the battery device 200.

[0106] Alternatively, in the fourth embodiment, when the first valve port 501, the second valve port 502 and the third valve port 503 of the first multi-way valve 500 are all controlled to be opened, and the fourth valve port 601, the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 are controlled to be opened, the cooling medium can circulate in the second heat exchange part, the battery device 200 and the cold storage structure 400.

[0107] The cold storage structure 400 is used to store the cooling medium; the cold storage structure 400 can be but is not limited to a container with a heat preservation function such as a cold storage tank, a cold storage barrel, a cold storage box, etc. The cold storage structure 400 can store the cooling medium, and when the battery device 200 operates at high power, the cold storage structure 400 can export the stored cooling medium and use it for cooling, so that the refrigeration power requirement for the refrigeration component 310 can be effectively reduced, and thus the refrigeration energy consumption can be reduced.

[0108] It should be understood that the above-mentioned refrigeration medium refers to the fluid medium circulating in the first heat exchange part and the refrigeration assembly 310, and the above-mentioned cooling medium refers to the fluid medium flowing in the second heat exchange part, the cold storage structure 400 and the battery device 200; it should be understood that the refrigeration medium is used to cool the cooling medium in the heat exchanger 320, and the refrigeration medium is refrigerated by the refrigeration assembly 310.

[0109] The energy storage device 1000 provided by the embodiment of the present application can use the first multi-way valve 500 and the second multi-way valve 600 to distribute the flow rate and flow path of the cooling medium. When the battery device 200 operates at a low rate, the heat generated by the battery device 200 is relatively low. The first multi-way valve 500 and the second multi-way valve 600 can distribute the cooling medium to the cold storage structure 400 to store cold. When the battery device 200 operates at a high rate, the heat generated by the battery device 200 is relatively high. The first multi-way valve 500 and the second multi-way valve 600 can distribute the cooling medium to the battery device 200 for cooling, and the cooling medium stored in the cold storage structure 400 can also be synchronously exported to assist in cooling, so that the battery device 200 can achieve a better heat dissipation effect in different working states, thereby effectively improving the heat dissipation efficiency of the battery device 200.

[0110] Please refer to Figure 3 and Figure 4 , in some embodiments, the refrigeration assembly 310 includes a compressor 311, a fan 312, an air cooler 313 and a condenser 314. The air inlet end of the fan 312 faces the air cooler 313, and the condenser 314 and the compressor 311 are connected in series between the first input end 321a and the first output end 321b; the air cooler 313 includes an inlet end 313a and an outlet end 313b, the outlet end 313b is connected to the first valve port 501, and the inlet end 313a is connected to the fifth valve port 602.

[0111] The refrigeration assembly 310 includes a compressor 311, a fan 312, an air cooler 313 and a condenser 314; the main function of the compressor 311 is to compress the refrigeration medium into a gas, increase its pressure and temperature, so as to provide power for the refrigeration cycle; the main function of the condenser 314 is to cool and condense the high-temperature and high-pressure gas refrigeration medium discharged by the compressor 311 into a liquid; the fan 312 is used to guide the air to form an air flow and dissipate heat from the air cooler 313; the air cooler 313 uses the air introduced by the fan 312 to generate convection and heat exchange, and transfers the heat from the cooling medium in the air cooler 313 to the air to realize natural cooling treatment of the cooling medium.

[0112] The condenser 314 and the compressor 311 are arranged in series between the first input end 321a and the first output end 321b, so that the condenser 314 and the compressor 311 can cool the refrigerant and circulate it into the first heat exchange part.

[0113] The outlet end 313b of the dry cooler 313 is connected to the first valve port 501, and the inlet end 313a is connected to the fifth valve port 602; that is, the first valve port 501 can be connected to the outlet end 313b of the dry cooler 313 and the second input end 322a of the second heat exchange unit at the same time, and the cooling medium derived from the first valve port 501 can be simultaneously passed into the outlet end 313b and the second input end 322a; the fifth valve port 602 can be connected to the inlet end 313a of the dry cooler 313 and the second output end 322b of the second heat exchange unit at the same time, and the cooling medium derived from the inlet end 313a and the cooling medium derived from the second output end 322b can both be passed into the fifth valve port 602. Therefore, the dry cooler 313 can also be turned on by controlling the on and off of the first valve port 501 and the fifth valve port 602, so that the dry cooler 313 and the second heat exchange unit provide cooling medium synchronously.

[0114] With such an arrangement, the compressor 311 and the condenser 314 can compress and cool the refrigerant medium and circulate it into the first heat exchange part to provide heat exchange and refrigeration for the cooling medium in the second heat exchange part; at the same time, the dry cooler 313 uses the fan 312 to naturally cool the cooling medium, which can cope with the situation when the battery device 200 is running at a low rate, and can also effectively reduce the energy consumption of refrigeration using the compressor 311.

[0115] Please refer to Figure 3 In some embodiments, the condenser 314 is disposed on the dry cooler 313 , the fan 312 is disposed on a side of the condenser 314 facing away from the dry cooler 313 , and an air inlet end of the fan 312 faces the condenser 314 .

[0116] The fan 312, the dry cooler 313 and the condenser 314 are integrated, that is, the dry cooler 313 is arranged on one side of the condenser 314, the fan 312 is arranged on the other side opposite to the condenser 314, and the air inlet end of the fan 312 faces the condenser 314; in this way, the dry cold air introduced by the air inlet end of the fan 312 can first pass through the dry cooler 313 and naturally cool the cooling medium in the dry cooler 313; the dry cold air absorbs the heat in the dry cooler 313 and heats up to form primary dry hot air, and the primary dry hot air can further perform heat exchange refrigeration treatment on the refrigerant medium of the gas compressed in the condenser 314, and the primary dry hot air absorbs the heat in the condenser 314 and heats up to form secondary dry hot air, which is discharged from the air outlet end of the fan 312.

[0117] With such an arrangement, the fan 312, the condenser 314 and the dry cooler 313 are integrally arranged. The dry cold air in the environment is introduced by the fan 312 to naturally cool the dry cooler 313 and the condenser 314 in sequence, which can effectively reduce the energy consumption of refrigeration using the compressor 311.

[0118] Please refer to Figure 3 , in some embodiments, the inlet end 313a is arranged at one end of the dry cooler 313 close to the condenser 314, and the outlet end 313b is arranged at the other end of the dry cooler 313 facing away from the condenser 314.

[0119] With such an arrangement, the dry cold air introduced by the fan 312 first contacts the side of the outlet end 313b of the dry cooler 313, and then the dry cold air fully contacts the coil structure of the dry cooler 313 to achieve full heat exchange with the cooling medium inside the dry cooler 313. Moreover, the flow direction of the dry cold air is opposite to the direction of the cooling medium from the inlet end to the outlet end 313b of the dry cooler 313 to form a convection, thereby effectively improving the heat exchange and cooling ability of the dry cold air to the cooling medium.

[0120] Please refer to Figure 1 , Figure 3 and Figure 4 , in some embodiments, the energy storage device 1000 further includes a third multi-way valve 700. The third multi-way valve 700 is arranged between the second multi-way valve 600, the input end and the inlet end 313a; the third multi-way valve 700 includes a seventh valve port 701, an eighth valve port 702 and a ninth valve port 703. The seventh valve port 701 is connected to the second input end 322a, the eighth valve port 702 is connected to the inlet end 313a, and the ninth valve port 703 is connected to the fifth valve port 602.

[0121] The third multi-way valve 700 is a valve device for fluid control. It can change the connection state of different channels in the valve body of the third multi-way valve 700, that is, control the opening and closing states of different valve ports of the third multi-way valve 700, so as to realize the switching of the fluid flow path. Optionally, the third multi-way valve 700 can be a three-way valve, a four-way valve, etc.; in some embodiments, the third multi-way valve 700 can adopt an electromagnetic valve.

[0122] The seventh valve port 701 of the third multi-way valve 700 is connected to the second input end 322a, the eighth valve port 702 is connected to the inlet end 313a, and the ninth valve port 703 is connected to the fifth valve port 602. Thus, by controlling the third multi-way valve 700, at least two of the second input end 322a, the inlet end 313a, and the fifth valve port 602 can be made to communicate with each other. In this way, by controlling the on / off of the third multi-way valve 700, it is possible to distribute the cooling medium derived from the battery device 200 or the cooling medium derived from the cold storage structure 400 to the second heat exchange part or the air-cooled condenser 313, so as to select the compression refrigeration or air-cooled natural cooling method for refrigeration according to different situations.

[0123] With such an arrangement, the third multi-way valve 700 can be used to distribute the cooling medium to the second heat exchange part or the air-cooled condenser 313 to meet the refrigeration requirements of the cooling medium under different working conditions of the battery device 200.

[0124] Please refer to Figure 1 、 Figure 3 and Figure 4 In some embodiments, the energy storage device 1000 further includes a first circulation pump 330, and the first circulation pump 330 is arranged between the second multi-way valve 600 and the third multi-way valve 700.

[0125] The first circulation pump 330 is used to provide power to the cooling medium to make the flow of the cooling medium smoother. It should be understood that the first circulation pump 330 is arranged between the second multi-way valve 600 and the third multi-way valve 700, that is, the first circulation pump 330 is located between the ninth valve port 703 and the fifth valve port 602; thus, the first circulation pump 330 can act on the heat exchange outlet 202 connected to the fourth valve port 601 of the second multi-way valve 600 and the cold storage outlet 402 connected to the sixth valve port 603, so that the cooling medium can be smoothly derived from the battery device 200 and the cold storage structure 400.

[0126] With such an arrangement, the use of the first circulation pump 330 can effectively improve the fluidity of the cooling medium to further improve the heat exchange and heat dissipation effect using the cooling medium.

[0127] Please refer to Figure 1 、 Figure 3 and Figure 4 In some embodiments, the energy storage device 1000 further includes a fourth multi-way valve 800, and the fourth multi-way valve 800 is arranged between the first multi-way valve 500, the second output end 322b, and the outlet end 313b; the fourth multi-way valve 800 includes a tenth valve port 801, an eleventh valve port 802, and a twelfth valve port 803, the tenth valve port 801 is connected to the second output end 322b, the eleventh valve port 802 is connected to the outlet end 313b, and the twelfth valve port 803 is connected to the first valve port 501.

[0128] The fourth multi-way valve 800 is a valve device for fluid control. By means of rotation, pushing, pulling or other mechanical operation methods, the connection states of different channels in the valve body of the fourth multi-way valve 800 can be changed, that is, the opening and closing states of different valve ports of the fourth multi-way valve 800 are controlled, so as to realize the switching of the fluid flow path. Optionally, the fourth multi-way valve 800 can be a three-way valve, a four-way valve, etc.; in some embodiments, the fourth multi-way valve 800 can adopt an electromagnetic valve.

[0129] The tenth valve port 801 of the fourth multi-way valve 800 is connected to the second output end 322b, the eleventh valve port 802 is connected to the outlet end 313b, and the twelfth valve port 803 is connected to the first valve port 501. Thus, by controlling the fourth multi-way valve 800, at least two of the second output end 322b, the outlet end 313b and the first valve port 501 can be made to communicate with each other. In this way, by controlling the on-off of the fourth multi-way valve 800, it is possible to selectively use the dry cooler 313 or the refrigeration assembly 310 in combination with the heat exchanger 320 to provide a cold connection medium for the battery device 200 to achieve temperature reduction.

[0130] Exemplarily, in the first embodiment, the tenth valve port 801 and the twelfth valve port 803 of the fourth multi-way valve 800 are open and the eleventh valve port 802 is closed. The first valve port 501, the second valve port 502 and the third valve port 503 of the first multi-way valve 500 are all open. At the same time, the fourth valve port 601, the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 are all open. The seventh valve port 701 and the ninth valve port 703 of the third multi-way valve 700 are open and the tenth valve port 801 is closed. The refrigeration assembly 310 and the heat exchange part are used to provide a cooling medium for the battery cells, and the cold storage structure 400 synchronously exports the cooling medium to reduce the load of the refrigeration assembly 310.

[0131] In the second embodiment, the eleventh valve port 802 and the twelfth valve port 803 of the fourth multi-way valve 800 are open and the tenth valve port 801 is closed. The first valve port 501 and the second valve port 502 of the first multi-way valve 500 are open and the third valve port 503 is closed. At the same time, the fourth valve port 601 and the fifth valve port 602 of the second multi-way valve 600 are open and the sixth valve port 603 is closed. The eighth valve port 702 and the ninth valve port 703 of the third multi-way valve 700 are open and the seventh valve port 701 is closed. The dry cooler 313 is used to naturally cool the cooling medium and circularly introduce it into the battery device 200 for heat exchange and heat dissipation.

[0132] In the third embodiment, the eleventh valve port 802 and the twelfth valve port 803 of the fourth multi-way valve 800 are opened and the tenth valve port 801 is closed, the first valve port 501 and the third valve port 503 of the first multi-way valve 500 are opened and the second valve port 502 is closed. At the same time, the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 are opened and the fourth valve port 601 is closed, the eighth valve port 702 and the ninth valve port 703 of the third multi-way valve 700 are opened and the seventh valve port 701 is closed. The dry cooler 313 is used to naturally cool the cooling medium and circularly introduce it into the cold storage structure 400 to store cold energy.

[0133] In the fourth embodiment, the tenth valve port 801 and the twelfth valve port 803 of the fourth multi-way valve 800 are opened and the eleventh valve port 802 is closed, the first valve port 501 and the third valve port 503 of the first multi-way valve 500 are opened and the second valve port 502 is closed. At the same time, the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 are opened and the fourth valve port 601 is closed, the seventh valve port 701 and the ninth valve port 703 of the third multi-way valve 700 are opened and the eighth valve port 702 is closed. The compressor 311, the condenser 314 and the heat exchanger 320 are used to refrigerate the cooling medium and circularly introduce it into the cold storage structure 400 to store cold energy.

[0134] With such a setting, the fourth multi-way valve 800 can also be used to select the cooling medium in the dry cooler 313 or the second heat exchange part for the heat dissipation of the battery device 200 or the cold storage of the cold storage structure 400 to meet the heat dissipation requirements of the battery device 200 in different working states.

[0135] Please refer to Figure 1 、 Figure 5 and Figure 6 , in some embodiments, the first multi-way valve 500 further includes a thirteenth valve port 504, and the thirteenth valve port 504 is connected to the fourth valve port 601.

[0136] In this embodiment, the first multi-way valve 500 can be a four-way valve, and the thirteenth valve port 504 of the first multi-way valve 500 is connected to the fourth valve port 601 of the second multi-way valve 600. In this way, the natural cooling cooling medium introduced into the first valve port 501 by the dry cooler 313 or the compression cooling cooling medium introduced into the first valve port 501 by the second heat exchange part can be switched by the first multi-way valve 500 to achieve various distribution methods; Exemplarily, the first valve port 501 and the second valve port 502 can be opened to introduce the cooling medium into the battery device 200 for heat exchange and temperature reduction; Or, the first valve port 501 and the third valve port 503 can be opened to introduce the cooling medium into the cold storage structure 400 for storing cold; Or, the first valve port 501 and the thirteenth valve port 504 can be opened so that the cooling medium directly enters the fourth valve port 601 of the second multi-way valve 600 without passing through the battery device 200 and the cold storage structure 400, and is led back to the dry cooler 313 or the second heat exchange part from the fifth valve port 602 or the sixth valve port 603 of the second multi-way valve 600 to realize the low-power self-circulation flow of the cooling medium.

[0137] With such a setting, the cooling medium derived from the dry cooler 313 or the second heat exchange part can also be directly led back to the dry cooler 313 or the second heat exchange part by using the first multi-way valve 500, so as to achieve the purpose of low-power circulation flow and realize the low-power standby state when there is no need to dissipate heat from the battery device 200 and no need to store cold in the cold storage structure 400.

[0138] Please refer to Figure 1 、 Figure 3 and Figure 4 In some embodiments, the energy storage device 1000 further includes a second circulation pump 340, and the second circulation pump 340 is disposed between the first multi-way valve 500 and the cold storage inlet 401.

[0139] The second circulation pump 340 is used to provide power for the cooling medium to make the flow of the cooling medium smoother. It should be understood that the second circulation pump 340 is disposed between the first multi-way valve 500 and the cold storage inlet 401. Thus, the second circulation pump 340 can act on the dry cooler 313 and the second heat exchange part so that the cooling medium can be smoothly introduced from the dry cooler 313 or the second heat exchange part into the cold storage structure 400.

[0140] With such a setting, the second circulation pump 340 can further improve the fluidity of the cooling medium to further improve the smoothness of introducing the cooling medium into the cold storage structure 400.

[0141] Please refer to Figure 1 、 Figure 3 and Figure 4, in some embodiments, the energy storage device 1000 further includes a controller, a temperature sensor, a flow meter, and a pressure sensor (the specific structures of the controller, the temperature sensor, the flow meter, and the pressure sensor are not shown in the figure); the controller is electrically connected to the first multi-way valve 500, the second multi-way valve 600, the third multi-way valve 700, the fourth multi-way valve 800, the first circulation pump 330, the second circulation pump 340, the temperature sensor, the flow meter, and the pressure sensor. The temperature sensor is used to monitor the temperature of the battery device 200 and the cooling medium, the flow meter is used to monitor the flow rate of the cooling medium, and the pressure sensor is used to monitor the pressure of the cooling medium.

[0142] The controller is electrically connected to the first multi-way valve 500, the second multi-way valve 600, the third multi-way valve 700, and the fourth multi-way valve 800, so that the controller can respectively perform electrical signal control on the first multi-way valve 500, the second multi-way valve 600, the third multi-way valve 700, and the fourth multi-way valve 800, and precisely control the opening and closing of different valve ports of each multi-way valve, as well as the opening degree. The controller is electrically connected to the first circulation pump 330 and the second circulation pump 340, so that the pump speeds of the first circulation pump 330 and the second circulation pump 340 can be controlled to achieve the flow control of the cooling medium; for example, the flow rate control of the cooling medium introduced into the cold storage structure 400 and the flow rate control of the cooling medium exported from the cold storage structure 400.

[0143] The temperature sensor is used to monitor the temperature of the battery device 200 and the cooling medium. Optionally, the number of temperature sensors can be multiple, and the multiple temperature sensors are used to monitor the temperature at different locations. In some embodiments, the temperature sensor can be disposed on the battery device 200 to monitor the temperature of the battery device 200 and the temperature of the cooling medium introduced into the battery device 200; the temperature sensor can be disposed on the dry cooler 313 to monitor the temperature of the cooling medium at the inlet end and the outlet end 313b of the dry cooler 313; the temperature sensor can also be disposed on the cold storage structure 400 to monitor the temperature of the cooling medium stored in the cold storage structure 400.

[0144] The flow meter is used to monitor the flow rate of the cooling medium, and the pressure sensor is used to monitor the pressure of the cooling medium; wherein, the flow meter and the pressure sensor can be disposed at any location, and can be but not limited to being disposed between the second output end 322b and the cold storage inlet 401 or the heat exchange inlet 201, between the outlet end 313b and the cold storage inlet 401 or the heat exchange inlet 201, between the second input end 322a and the cold storage outlet 402 or the heat exchange outlet 202, between the inlet end and the cold storage outlet 402 or the heat exchange outlet 202, etc.

[0145] The controller is also electrically connected to the temperature sensor, the flow meter, and the pressure sensor, so that the data monitored by the temperature sensor, the flow meter, and the pressure sensor can be fed back to the controller, enabling the controller to adjust the control of the first multi-way valve 500, the second multi-way valve 600, the third multi-way valve 700, the fourth multi-way valve 800, the first circulation pump 330, and the second circulation pump 340 in real time.

[0146] With such an arrangement, the temperature sensor, the flow meter, and the pressure sensor can be used to monitor the temperature of the battery device 200, the temperature, flow rate, and pressure of the cooling medium, and the controller can be used to achieve the automatic control of the first multi-way valve 500, the second multi-way valve 600, the third multi-way valve 700, and the fourth multi-way valve 800.

[0147] Please refer to Figure 1 、 Figure 3 and Figure 4 In some embodiments, the energy storage device 1000 further includes a cabinet 100. The battery device 200, the refrigeration component 310, and the heat exchanger 320 are disposed inside the cabinet 100, and the cold storage structure 400 is disposed outside the cabinet 100.

[0148] The cabinet 100 is used to accommodate the battery device 200, the refrigeration component 310, the heat exchanger 320, and other components; optionally, the cabinet 100 includes, but is not limited to, various configurations such as a rectangular cabinet 100, a columnar cabinet 100, and a box-type cabinet 100. As the external structure of the storage and charging integrated device, the cabinet 100 can cover and protect the internal battery device 200, refrigeration component 310, heat exchanger 320, and other components to reduce the influence of rain, dust, etc. on the inside of the cabinet 100. In some embodiments, the cabinet 100 can be made of waterproof, dustproof, and ultraviolet-resistant materials, such as polyvinyl chloride, polycarbonate, polypropylene, etc.

[0149] The cold storage structure 400 is disposed outside the cabinet 100; optionally, the cold storage structure 400 can be disposed at any position such as the top side, the peripheral side, the bottom side, etc. outside the cabinet 100. The cold storage structure 400 is installed outside the cabinet 100, and then connected to the second heat exchange part and other structures inside the cabinet 100 through a pipeline structure to realize the circulation and conduction of the cooling medium.

[0150] With such an arrangement, the cabinet 100 can cover and protect the battery device 200, the refrigeration component 310, and the heat exchanger 320. At the same time, disposing the cold storage structure 400 outside the cabinet 100 can reduce the occupation of the internal space of the cabinet 100 by the cold storage structure 400.

[0151] Please refer to Figure 1 In some embodiments, the cold storage structure 400 is buried below the cabinet 100.

[0152] Optionally, the cold storage structure 400 can be buried directly below the cabinet 100, that is, in the direction of gravity, the projection of the cold storage structure 400 is within the range of the cabinet 100. Alternatively, the cold storage structure 400 can be buried below the side of the cabinet 100, that is, in the direction of gravity, the projection of the cold storage structure 400 is outside the range of the cabinet 100. Or, in the direction of gravity, a part of the projection of the cold storage structure 400 coincides with the projection of the cabinet 100. In some embodiments, when the cabinet 100 is installed on the ground, the cold storage structure 400 can be buried in the ground.

[0153] Wherein, a corrosion-resistant layer can be provided on the surface of the cold storage structure 400 to reduce the probability of the cold storage structure 400 being corroded and improve the service life of the cold storage structure 400. Alternatively, a heat-insulating layer can also be provided on the surface of the cold storage structure 400 to further improve the heat-insulating ability of the cold storage structure 400 and reduce the rate of cold loss.

[0154] With such a setting, burying the cold storage structure 400 below the cabinet 100 has a better heat-insulating effect, and the cold storage structure 400 has a lower impact on the space around the cabinet 100.

[0155] Next, taking the energy storage device 1000 as an integrated energy storage and charging device as an example, the energy storage device 1000 will be further introduced in detail.

[0156] Please refer to Figure 1 、 Figure 3 and Figure 4 , in this embodiment, the energy storage device 1000 includes a cabinet 100, a battery device 200, a thermal management module 300, a cold storage structure 400, a first multi-way valve 500, a second multi-way valve 600, a third multi-way valve 700, and a fourth multi-way valve 800; the battery device 200 includes a heat exchange inlet 201 and a heat exchange outlet 202, and the cold storage structure 400 includes a cold storage inlet 401 and a cold storage outlet 402.

[0157] The thermal management module 300 includes a refrigeration component 310 and a heat exchanger 320. The heat exchanger 320 includes a first heat exchange part and a second heat exchange part. The first heat exchange part includes a first input end 321a and a first output end 321b, and the second heat exchange part includes a second input end 322a and a second output end 322b. In this embodiment, the heat exchanger 320 can adopt a plate heat exchanger 320.

[0158] The refrigeration assembly 310 includes a compressor 311, a fan 312, an air cooler 313, and a condenser 314. The condenser 314 is disposed on the air cooler 313. The fan 312 is disposed on the side of the condenser 314 facing away from the air cooler 313, and the air inlet end of the fan 312 faces the condenser 314. The condenser 314 and the compressor 311 are connected in series between the first input end 321a and the first output end 321b. The air cooler 313 includes an inlet end 313a and an outlet end 313b.

[0159] The first multi-way valve 500 includes a first valve port 501, a second valve port 502, and a third valve port 503. The first valve port 501 is connected to the second output end 322b. The second valve port 502 is connected to the heat exchange inlet 201. The third valve port 503 is connected to the cold storage inlet 401. The second multi-way valve 600 includes a fourth valve port 601, a fifth valve port 602, and a sixth valve port 603. The fourth valve port 601 is connected to the heat exchange outlet 202. The fifth valve port 602 is connected to the second input end 322a. The sixth valve port 603 is connected to the cold storage outlet 402. The third multi-way valve 700 includes a seventh valve port 701, an eighth valve port 702, and a ninth valve port 703. The seventh valve port 701 is connected to the second input end 322a. The eighth valve port 702 is connected to the inlet end 313a. The ninth valve port 703 is connected to the fifth valve port 602. The fourth multi-way valve 800 includes a tenth valve port 801, an eleventh valve port 802, and a twelfth valve port 803. The tenth valve port 801 is connected to the second output end 322b. The eleventh valve port 802 is connected to the outlet end 313b. The twelfth valve port 803 is connected to the first valve port 501.

[0160] Wherein, the energy storage device 1000 further includes a first circulation pump 330 and a second circulation pump 340. The first circulation pump 330 is disposed between the second multi-way valve 600 and the third multi-way valve 700. The second circulation pump 340 is disposed between the first multi-way valve 500 and the cold storage inlet 401.

[0161] In this way, by controlling the first multi-way valve 500, the second multi-way valve 600, the third multi-way valve 700, and the fourth multi-way valve 800, the distribution of the cooling medium for the battery device 200 in different scenarios is realized, so as to achieve the purpose of efficient heat dissipation.

[0162] Exemplarily, in the first scenario, when the battery device 200 in the integrated storage and charging machine discharges at a high rate to achieve the charging function, a large amount of heat will be generated by the battery device 200. If the temperature of the battery device 200 is greater than the temperature of the cooling medium introduced into the battery device 200, the tenth valve port 801 and the twelfth valve port 803 of the fourth multi-way valve 800 can be opened and the eleventh valve port 802 can be closed. The first valve port 501, the second valve port 502, and the third valve port 503 of the first multi-way valve 500 are all opened. The fourth valve port 601, the fifth valve port 602, and the sixth valve port 603 of the second multi-way valve 600 are all opened. The seventh valve port 701 and the ninth valve port 703 of the third multi-way valve 700 are opened and the eighth valve port 702 is closed. The compressor 311, the condenser 314, and the plate heat exchanger 320 are used to circulate and refrigerate the cooling medium and supply it to the battery device 200 for heat exchange and heat dissipation.

[0163] Alternatively, in the second scenario, when the battery device 200 in the integrated storage and charging machine is charging at a low rate, the heat generated by the battery is relatively low. If the temperature of the battery device 200 is less than the temperature of the cooling medium introduced into the battery device 200 and the ambient temperature is relatively high, that is, when the temperature of the cooling medium discharged by the dry cooler 313 is greater than the temperature of the cooling medium stored in the cold storage structure 400, the tenth valve port 801 and the twelfth valve port 803 of the fourth multi-way valve 800 can be opened and the eleventh valve port 802 can be closed. The first valve port 501 and the third valve port 503 of the first multi-way valve 500 are opened and the second valve port 502 is closed. The fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 are opened and the fourth valve port 601 is closed. The seventh valve port 701 and the ninth valve port 703 of the third multi-way valve 700 are opened and the eighth valve port 702 is closed. The compressor 311, the condenser 314, and the plate heat exchanger 320 are used to circulate and refrigerate the cooling medium and supply it to the cold storage structure 400 for cold storage.

[0164] Alternatively, in the third scenario, when the battery device 200 in the integrated storage and charging machine is in a state of low-rate charging, if the temperature of the battery device 200 is lower than the temperature of the cooling medium introduced into the battery device 200 and the ambient temperature is low, that is, when the temperature of the cooling medium discharged by the dry cooler 313 is lower than the temperature of the cooling medium stored in the cold storage structure 400, the tenth valve port 801, the eleventh valve port 802, and the twelfth valve port 803 of the fourth multi-way valve 800 can be opened, the first valve port 501 and the third valve port 503 of the first multi-way valve 500 can be opened and the second valve port 502 can be closed, the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 can be opened and the fourth valve port 601 can be closed, the seventh valve port 701, the eighth valve port 702, and the ninth valve port 703 of the third multi-way valve 700 can be opened, and the cooling medium can be refrigerated by the compressor 311, the condenser 314, and the plate heat exchanger 320. At the same time, the cooling medium can be naturally cooled and refrigerated by the dry cooler 313 and provided to the cold storage structure 400 for storing cold energy.

[0165] Alternatively, in the fourth scenario, when the battery device 200 in the integrated storage and charging machine is in a state of low-rate charging, if the temperature of the battery device 200 is lower than the temperature of the cooling medium introduced into the battery device 200 and the ambient temperature is low, that is, when the temperature of the cooling medium discharged by the dry cooler 313 is lower than the temperature of the cooling medium stored in the cold storage structure 400, the eleventh valve port 802 and the twelfth valve port 803 of the fourth multi-way valve 800 can be opened and the tenth valve port 801 can be closed, the first valve port 501 and the third valve port 503 of the first multi-way valve 500 can be opened and the second valve port 502 can be closed, the fifth valve port 602 and the sixth valve port 603 of the second multi-way valve 600 can be opened and the fourth valve port 601 can be closed, the seventh valve port 701 and the ninth valve port 703 of the third multi-way valve 700 can be opened and the eighth valve port 702 can be closed, and the cooling medium can be naturally cooled and refrigerated by the dry cooler 313 and provided to the cold storage structure 400 for storing cold energy.

[0166] At the same time, the following refrigeration methods can also be adopted according to the ambient temperature and the operation time:

[0167] When the integrated storage and charging machine is in the charging stage at night, when the ambient temperature is greater than about 15 °C, the refrigeration strategy of the second scenario described above can be adopted; when the ambient temperature is about 10 °C to 15 °C, the refrigeration strategy of the third scenario described above can be adopted; when the ambient temperature is less than about 10 °C, the refrigeration strategy of the fourth scenario described above can be adopted.

[0168] When the integrated storage and charging machine is in the discharging stage during the day, the refrigeration strategy of the first scenario described above can be adopted. Similarly, when it is in the charging stage during the day, the refrigeration method at night can be the same.

[0169] Please refer toFigure 1 and Figure 7 In a second aspect, an embodiment of the present application further provides an energy storage system 2000, including a power conversion device 2100 and the energy storage device 1000 as described above. The power conversion device 2100 is used to electrically connect a power generation device 2200 and the energy storage device 1000.

[0170] In some embodiments, the energy storage system 2000 may include one or more energy storage devices 1000 and a power conversion device 2100. The power conversion device 2100 is used to connect between the power generation device 2200 and the energy storage device 1000. The power generation device 2200 is used to generate electric energy, and the electric energy generated by the power generation device 2200 can be stored in the energy storage device 1000 through the power conversion device 2100. As an example, the power generation device 2200 may specifically be a solar panel, a hydraulic power generation device 2200, a thermal power generation device 2200, a wind power generation device 2200, etc. The specific type of the power generation device 2200 is not limited in the present application.

[0171] The energy storage system 2000 provided by the embodiment of the present application includes the above-mentioned energy storage device 1000. Therefore, the energy storage system 2000 has a higher heat dissipation efficiency for the battery device 200.

[0172] Please refer to Figure 1 , Figure 7 and Figure 8 In a third aspect, an embodiment of the present application further provides a charging network 3000, including a charging pile 3100 and the energy storage device 1000 as described above or the energy storage system 2000 as described above. The energy storage device 1000 is used to provide electric energy for the charging pile 3100.

[0173] An embodiment of the present application provides a charging network 3000, including a charging pile 3100 and an energy storage device 1000. The charging pile 3100 is electrically connected to the energy storage device 1000, and the energy storage device 1000 is used to provide electric energy for the charging pile 3100. The charging pile 3100 and the battery device 200 in the energy storage device 1000 are electrically connected through a cable, and the battery device 200 can provide the electric energy stored by itself for the charging pile 3100. The charging pile 3100 has one or more connectors 3110, and the connectors 3110 are used to connect to an electrical device (such as a vehicle), so as to replenish energy to the electrical device.

[0174] The energy storage device 1000 may be located inside the charging pile 3100 (such as an integrated charging and energy storage machine), or may be located outside the charging pile 3100.

[0175] The charging network 3000 provided by the embodiment of the present application includes the above-mentioned energy storage device 1000 or energy storage system 2000. Therefore, the charging network 3000 has a higher heat dissipation efficiency.

[0176] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An energy storage device, characterized in that: include A battery device, the battery device comprising a heat exchange inlet and a heat exchange outlet; A thermal management module, the thermal management module comprising a refrigeration component and a heat exchanger, the heat exchanger comprising a first heat exchange part and a second heat exchange part, the first heat exchange part comprising a first input end and a first output end, the second heat exchange part comprising a second input end and a second output end; the refrigeration component is arranged in series between the first input end and the first output end; A cold storage structure, the cold storage structure comprising a cold storage inlet and a cold storage outlet; a first multi-way valve, the first multi-way valve comprising a first valve port, a second valve port and a third valve port, the first valve port being connected to the second output end, the second valve port being connected to the heat exchange inlet, and the third valve port being connected to the cold storage inlet; as well as The second multi-way valve comprises a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port is connected to the heat exchange outlet, the fifth valve port is connected to the second input end, and the sixth valve port is connected to the cold storage outlet.

2. The energy storage device according to claim 1, characterized in that: The refrigeration assembly includes a compressor, a fan, a dry cooler and a condenser, the air inlet end of the fan faces the dry cooler, and the condenser and the compressor are arranged in series between the first input end and the first output end; The dry cooler comprises an inlet end and an outlet end, the outlet end is connected to the first valve port, and the inlet end is connected to the fifth valve port.

3. The energy storage device according to claim 2, characterized in that: The condenser is arranged on the dry cooler, the fan is arranged on a side of the condenser facing away from the dry cooler, and an air inlet end of the fan faces the condenser.

4. The energy storage device according to claim 3, characterized in that: The inlet end is arranged at one end of the dry cooler close to the condenser, and the outlet end is arranged at the other end of the dry cooler facing away from the condenser.

5. The energy storage device according to any one of claims 2 to 4, characterized in that: The energy storage device also includes a third multi-way valve, which is arranged between the second multi-way valve, the input end and the inlet end; the third multi-way valve includes a seventh valve port, an eighth valve port and a ninth valve port, the seventh valve port is connected to the second input end, the eighth valve port is connected to the inlet end, and the ninth valve port is connected to the fifth valve port.

6. The energy storage device according to claim 5, characterized in that: The energy storage device further includes a first circulation pump, which is disposed between the second multi-way valve and the third multi-way valve.

7. The energy storage device according to claim 6, characterized in that: The energy storage device also includes a fourth multi-way valve, which is arranged between the first multi-way valve, the second output end and the outlet end; the fourth multi-way valve includes a tenth valve port, an eleventh valve port and a twelfth valve port, the tenth valve port is connected to the second output end, the eleventh valve port is connected to the outlet end, and the twelfth valve port is connected to the first valve port.

8. The energy storage device according to claim 7, characterized in that: The first multi-way valve further includes a thirteenth valve port, and the thirteenth valve port is connected to the fourth valve port.

9. The energy storage device according to claim 7, characterized in that: The energy storage device further includes a second circulation pump, which is arranged between the first multi-way valve and the cold storage inlet.

10. The energy storage device according to claim 9, characterized in that: The energy storage device also includes a controller, a temperature sensor, a flow meter and a pressure sensor; the controller is electrically connected to the first multi-way valve, the second multi-way valve, the third multi-way valve, the fourth multi-way valve, the first circulation pump, the second circulation pump, the temperature sensor, the flow meter and the pressure sensor, the temperature sensor is used to monitor the temperature of the battery device and the cooling medium, the flow meter is used to monitor the flow of the cooling medium, and the pressure sensor is used to monitor the pressure of the cooling medium.

11. The energy storage device according to any one of claims 1 to 4, characterized in that: The energy storage device further comprises a cabinet, the battery device, the refrigeration assembly and the heat exchanger are arranged inside the cabinet, and the cold storage structure is arranged outside the cabinet.

12. The energy storage device according to claim 11, characterized in that: The cold storage structure is buried under the cabinet.

13. An energy storage system, characterized in that: It comprises a power conversion device and an energy storage device as claimed in any one of claims 1 to 12, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

14. A charging network, characterized in that: It comprises a charging pile and an energy storage device as described in any one of claims 1 to 12 or an energy storage system as described in claim 13, wherein the energy storage device is used to provide electrical energy for the charging pile.

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