Energy storage device and photovoltaic energy storage system

Abstract

The present application provides an energy storage device and a photovoltaic energy storage system. The energy storage device comprises a thermal management module, a battery module, a first power unit, a second power unit, and a radiator module. The thermal management module comprises a shell, and a multi-way valve, a first evaporator and a condenser which are arranged in the shell, and the shell comprises a plurality of first interfaces. Two coolant liquid ports of the first evaporator are connected to the multi-way valve, and two coolant liquid ports of the condenser are connected between the multi-way valve and one first interface. The battery module comprises a battery heat exchange plate, the first power unit comprises a first power circuit heat exchange plate, the second power unit comprises a second power circuit heat exchange plate, and the radiator module comprises a radiator. The battery heat exchange plate, the first power circuit heat exchange plate, the second power circuit heat exchange plate, and the radiator are connected to the multi-way valve respectively by means of the corresponding first interfaces. By using the energy storage device, the temperatures of a battery and two power circuit heat exchange plates can be efficiently regulated and controlled.

Description

Energy storage device and photoelectric storage system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on September 28, 2023, with application number 202311286910.6 and invention name "A Energy Storage Device and Photovoltaic Storage System", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of energy technology, and in particular to an energy storage device and a photovoltaic storage system. Background Art

[0004] With the continuous development and widespread application of clean energy, energy storage devices capable of storing electrical energy have begun to be widely used in various fields. Currently, there is an increasing number of large-scale energy storage devices at the cabinet or container level, which can accommodate more batteries and thus improve the energy storage capacity of energy storage devices.

[0005] Furthermore, to control the battery's charge and discharge processes, energy storage devices also include power modules. These modules generate significant heat during operation, particularly under certain operating conditions, where overload can cause a sharp increase in heat generation. To ensure operational reliability and safety, effective heat dissipation is required. Energy storage devices typically incorporate a heat dissipation system for the power modules. However, traditional air-cooling systems are inefficient and cannot meet the heat dissipation requirements of overloaded power modules.

[0006] Summary of the Invention

[0007] The present application provides an energy storage device and a photovoltaic storage system for achieving efficient heat dissipation of a power module, thereby improving the safety of the energy storage device.

[0008] In a first aspect, the present application provides an energy storage device, which may include a thermal management module, a battery module, a first power unit, a second power unit, and a radiator module. The thermal management module includes a housing, a multi-way valve, a first evaporator, and a condenser disposed within the housing, and the housing includes multiple first interfaces. The two coolant ports of the first evaporator are connected to the multi-way valve, and the two coolant ports of the condenser are connected between the multi-way valve and a first interface. The battery module includes a battery and a battery heat exchange plate, the battery contacts the battery heat exchange plate, and the two coolant ports of the battery heat exchange plate are respectively connected to the multi-way valve via a first interface. The first power unit includes an energy storage converter and a first power circuit heat exchange plate, the energy storage converter contacts the first power circuit heat exchange plate, and the two coolant ports of the first power circuit heat exchange plate are respectively connected to the multi-way valve via a first interface. The second power unit includes a DC converter and a second power circuit heat exchange plate, the DC converter contacts the second power circuit heat exchange plate, and the two coolant ports of the second power circuit heat exchange plate are respectively connected to the multi-way valve via a first interface. The radiator module includes a radiator, and the two coolant ports of the radiator are respectively connected to the multi-way valve through a first interface. In the energy storage device provided in the present application, the corresponding coolant interface and the coolant passage between the corresponding coolant interface and the first evaporator or condenser can be connected or disconnected by the multi-way valve, so that in multiple modes, heat can be exchanged with the battery heat exchange plate, the first power circuit heat exchange plate and the second power circuit heat exchange plate through the circulation of the coolant, thereby effectively improving the temperature control efficiency of the battery heat exchange plate, the first power circuit heat exchange plate and the second power circuit heat exchange plate, thereby improving the temperature control efficiency of the battery, the energy storage converter and the DC converter, which is conducive to improving the operating reliability of the energy storage device. In addition, in the energy storage device, by integrating the various structures of the thermal management module into a shell, the integration of the thermal management module can be effectively improved, which facilitates the connection between the thermal management module and other modules, and saves the pipeline connecting the thermal management module with other modules, thereby helping to reduce the cost of the energy storage device.

[0009] In a possible implementation of the present application, the thermal management system further includes a first throttle valve, which is disposed in the shell. The energy storage device further includes a compressor, which can be disposed in the shell, which is conducive to improving the integration of the energy storage device. Alternatively, the compressor can be disposed outside the shell, and the shell further includes two second interfaces, and the compressor is connected between the two second interfaces, which can improve the flexibility of the compressor setting position. In addition, the compressor, the first evaporator, the first throttle valve and the condenser are connected in sequence through the refrigerant pipeline to form a refrigerant circulation loop. The refrigerant circulation loop can achieve heat exchange with the battery heat exchange plate, the first power circuit heat exchange plate and the second power circuit heat exchange plate by exchanging heat with the coolant flowing through the first evaporator or the condenser, thereby realizing the regulation of the temperature of the battery, the energy storage converter and the DC converter.

[0010] In one possible implementation of the present application, a multi-way valve is connected between the first power circuit heat exchange plate and the first evaporator. The multi-way valve is used to open or close the coolant passage between the first power circuit heat exchange plate and the first evaporator. By connecting corresponding valve ports of the multi-way valve, the first power circuit heat exchange plate and the first evaporator are connected in series to the same coolant circulation loop. Coolant cooled by the first evaporator exchanges heat with the first power circuit heat exchange plate, thereby dissipating heat from the energy storage inverter and meeting the heat dissipation requirements of the energy storage inverter under overload conditions.

[0011] In one possible implementation of the present application, the battery heat exchange plate and the first power circuit heat exchange plate are connected in series and are connected between two valve ports of a multi-way valve via a first interface. This allows the battery heat exchange plate, the first power circuit heat exchange plate, and the first evaporator to be connected in series to the same coolant circulation loop by connecting the corresponding valve ports of the multi-way valve. This allows the first evaporator to exchange heat with the coolant in the coolant circulation loop to cool the battery heat exchange plate and the first power circuit heat exchange plate, thereby dissipating heat from the battery and energy storage converter. This can meet the heat dissipation requirements of the energy storage converter under overload conditions, thereby improving the operational reliability of the energy storage device.

[0012] Furthermore, the battery heat exchange plate and the first power circuit heat exchange plate can be connected in parallel and connected between the two valve ports of the multi-way valve via a first interface. This allows the corresponding valve ports of the multi-way valve to be connected, allowing coolant cooled by the first evaporator to enter the battery heat exchange plate and the first power circuit heat exchange plate, respectively, to cool the battery heat exchange plate and the first power circuit heat exchange plate, thereby dissipating heat from the battery and energy storage converter. This also meets the heat dissipation requirements of the energy storage converter under overload conditions, thereby improving the operational reliability of the energy storage device.

[0013] In the energy storage device provided in the present application, in addition to being connected to the battery heat exchange plate and the first power circuit heat exchange plate in the above-mentioned manner, in one possible implementation, the two coolant ports of the first power circuit heat exchange plate and the two coolant ports of the battery heat exchange plate can also be connected to different valve ports of the multi-way valve through different first interfaces, respectively, so as to realize the series or parallel connection of the battery heat exchange plate and the first power circuit heat exchange plate by connecting the corresponding valve ports of the multi-way valve.

[0014] In one possible implementation of the present application, the battery heat exchange plate and the second power circuit heat exchange plate are connected in series and are connected between two valve ports of a multi-way valve via a first interface. This allows the battery heat exchange plate, the second power circuit heat exchange plate, and the first evaporator to be connected in series to the same coolant circulation loop by connecting the corresponding valve ports of the multi-way valve. This allows the battery heat exchange plate and the second power circuit heat exchange plate to be cooled by heat exchange between the first evaporator and the coolant in the coolant circulation loop, thereby dissipating heat from the battery and energy storage converter. This can meet the heat dissipation requirements of the energy storage converter under overload conditions, thereby improving the operational reliability of the energy storage device.

[0015] Furthermore, the battery heat exchange plate and the second power circuit heat exchange plate can be connected in parallel and connected between the two valve ports of the multi-way valve via a first interface. This allows the corresponding valve ports of the multi-way valve to be connected, allowing coolant cooled by the first evaporator to enter the battery heat exchange plate and the second power circuit heat exchange plate, respectively, to cool the battery heat exchange plate and the second power circuit heat exchange plate, thereby dissipating heat from the battery and energy storage converter. This also meets the heat dissipation requirements of the energy storage converter under overload conditions, thereby improving the operational reliability of the energy storage device.

[0016] In the energy storage device provided in the present application, in addition to being connected in the above-mentioned manner, in one possible implementation, the two coolant ports of the second power circuit heat exchange plate and the two coolant ports of the battery heat exchange plate can also be connected to different valve ports of the multi-way valve through different first interfaces, respectively, so as to realize the series or parallel connection of the battery heat exchange plate and the second power circuit heat exchange plate by connecting the corresponding valve ports of the multi-way valve.

[0017] In one possible implementation of the present application, the second power circuit heat exchange plate and the condenser are connected in series via a first interface and between two valve ports of a multi-way valve. This allows the second power circuit heat exchange plate and the condenser to be connected in series to the same coolant circulation loop by connecting the corresponding valve ports of the multi-way valve. This allows the second power circuit heat exchange plate and the condenser to be cooled simultaneously by the same cooling water flow, which helps improve the energy efficiency of the energy storage device.

[0018] Furthermore, the second power circuit heat exchange plate and the condenser can be connected in parallel via the first interface and connected between the two valve ports of the multi-way valve. By connecting the corresponding valve ports of the multi-way valve, the coolant circulation loop containing the second power circuit heat exchange plate and the coolant circulation loop containing the condenser are connected in parallel. This allows the same cooling water flow to dissipate heat from both the second power circuit heat exchange plate and the condenser, thereby improving the energy efficiency of the energy storage device.

[0019] Furthermore, the first power circuit board heat exchanger and the second power circuit board heat exchanger can be connected in series or in parallel via the first interface and connected between the two valve ports of the multi-way valve. This allows the first and second power circuit boards, as well as the condenser, to be cooled simultaneously through the same cooling water flow, thereby improving the energy efficiency of the energy storage device.

[0020] In one possible implementation of the present application, the energy storage device further includes a first water pump, and the battery heat exchange plate is connected in series with the first water pump and is connected between the two valve ports of the multi-way valve through a first interface. One coolant port of the first power circuit heat exchange plate, one coolant port of the second power circuit heat exchange plate, and one coolant port of the condenser are all connected to one valve port of the multi-way valve, and another coolant port of the first power circuit heat exchange plate and another coolant port of the second power circuit heat exchange plate are both connected to another valve port of the multi-way valve. In addition, the liquid outlet of the first water pump is connected to one coolant port of the first power circuit heat exchange plate and one coolant port of the second power circuit heat exchange plate, and the liquid inlet of the first water pump is connected to another coolant port of the first power circuit heat exchange plate and another coolant port of the second power circuit heat exchange plate. In this way, in scenarios where the heat dissipation requirements of the first power circuit and the second power circuit are high, such as high-temperature environments or overload operation, part of the low-temperature cooling water used to cool the battery can be introduced into the coolant circulation loop of the first power circuit heat exchange plate and the second power circuit heat exchange plate through the first water pump, and part of the cooling water flowing through the first power circuit heat exchange plate and the second power circuit heat exchange plate can be returned to the coolant circulation loop where the battery heat exchange plate is located, so as to ensure the balance of the coolant in each coolant circulation loop, and realize the heat dissipation of the first power circuit heat exchange plate and the second power circuit heat exchange plate, thereby realizing the heat dissipation of the first power circuit and the second power circuit.

[0021] In a possible implementation of the present application, the energy storage device further includes a first three-way valve and a second three-way valve, and a coolant port of the first power circuit heat exchange plate, a coolant port of the second power circuit heat exchange plate, and a liquid outlet of the first water pump are respectively connected to the three valve ports of the first three-way valve in a one-to-one correspondence, and another coolant port of the first power circuit heat exchange plate, another coolant port of the second power circuit heat exchange plate, and a liquid inlet of the first water pump are respectively connected to the three valve ports of the second three-way valve in a one-to-one correspondence, thereby controlling the connection or disconnection state of one coolant port of the first power circuit heat exchange plate, one coolant port of the second power circuit heat exchange plate, and the liquid outlet of the first water pump by connecting and disconnecting the valve ports of the first three-way valve and the second three-way valve, and controlling the connection or disconnection state of another coolant port of the first power circuit heat exchange plate, another coolant port of the second power circuit heat exchange plate, and the liquid inlet of the first water pump, thereby achieving independent regulation of the temperature of the energy storage converter and the DC converter, which is beneficial to improving the energy efficiency of the energy storage device.

[0022] In one possible implementation of this application, a multi-way valve is connected between the battery heat exchange plate and the first evaporator to open or close the passage between the battery heat exchange plate and the first evaporator. When the energy storage device operates in high-temperature mode, the multi-way valve connects the coolant passage between the battery heat exchange plate and the first evaporator, cooling the battery heat exchange plate through the first evaporator and thus dissipating heat from the battery.

[0023] In a possible implementation of the present application, the multi-way valve is also connected between the battery heat exchange plate and the condenser, and is used to connect or disconnect the passage between the battery heat exchange plate and the condenser. At this time, the coolant passage between the battery heat exchange plate and the condenser can be connected through the multi-way valve, so that the battery heat exchange plate can be heated by the heat generated by the condenser, thereby enabling the energy storage device to operate in heat pump mode.

[0024] In one possible implementation of the present application, the radiator module includes two radiators, each of which has two coolant ports connected to different valve ports of a multi-way valve via different first interfaces. This allows the two radiators to be connected to corresponding coolant circulation loops by connecting the corresponding valve ports of the multi-way valve, which facilitates diversifying the operating modes of the energy storage device.

[0025] In a possible implementation of the present application, the multi-way valve is also connected between the first power circuit heat exchange plate and a radiator. The multi-way valve is used to connect or disconnect the passage between the first power circuit heat exchange plate and a radiator. When the multi-way valve connects the passage between the first power circuit heat exchange plate and a radiator, the first power circuit heat exchange plate can be cooled through the radiator, thereby achieving heat dissipation of the energy storage inverter.

[0026] In one possible implementation of the present application, a multi-way valve is further connected between the condenser and another radiator, and is used to connect or disconnect the passage between the condenser and the other radiator. When the multi-way valve connects the passage between the condenser and the other radiator, the condenser can be cooled by the other radiator.

[0027] In one possible implementation of the present application, the first power unit further includes a first bypass valve, which is arranged in parallel with the first power circuit heat exchange plate. This allows the first bypass valve to regulate the flow of coolant through the first power circuit heat exchange plate, thereby meeting the heat dissipation requirements of the first power circuit heat exchange plate in different operating modes and improving the operational reliability of the energy storage device.

[0028] The second power unit also includes a second bypass valve, which is arranged in parallel with the second power circuit heat exchange plate. This allows the second bypass valve to regulate the flow of coolant through the second power circuit heat exchange plate, thereby meeting the heat dissipation requirements of the second power circuit heat exchange plate in different operating modes, which helps improve the operational reliability of the energy storage device.

[0029] In a second aspect, this application also provides a photovoltaic storage system, which may include a power generation device, a power conversion device, and the energy storage device described in the first aspect. The power conversion device is connected between the power generation device and the energy storage device, and the power generation device is used to store the generated electrical energy in the battery of the energy storage device through the power conversion device. By using the above-mentioned energy storage device, the operational reliability of the photovoltaic storage system can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a structural block diagram of an energy storage device provided in an embodiment of the present application;

[0031] FIG2a is a schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0032] FIG2 b is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0033] FIG2c is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0034] FIG2 d is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0035] FIG2e is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0036] FIG2f is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0037] FIG2g is another structural schematic diagram of the energy storage device provided in an embodiment of the present application;

[0038] FIG2h is another structural schematic diagram of the energy storage device provided in an embodiment of the present application;

[0039] FIG2i is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0040] FIG2j is another structural schematic diagram of the energy storage device provided in an embodiment of the present application;

[0041] FIG3 a is a schematic diagram of a flow path of an operating mode of the energy storage device provided in FIG2 a ;

[0042] FIG3 b is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG2 a ;

[0043] FIG3 c is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG2 a ;

[0044] FIG3 d is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG2 a ;

[0045] FIG3e is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG2a;

[0046] FIG4a is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0047] FIG4 b is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0048] FIG5 a is a schematic diagram of a flow path of an operating mode of the energy storage device provided in FIG4 a ;

[0049] FIG5 b is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG4 a ;

[0050] FIG5 c is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG4 a ;

[0051] FIG5 d is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG4 a ;

[0052] FIG5e is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG4a;

[0053] FIG6 a is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0054] FIG6 b is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0055] FIG6 c is another structural schematic diagram of the energy storage device provided in an embodiment of the present application;

[0056] FIG6 d is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0057] FIG6e is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0058] FIG7a is another structural schematic diagram of an energy storage device provided in an embodiment of the present application;

[0059] FIG7 b is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0060] FIG8 a is a schematic diagram of a flow path of an operating mode of the energy storage device provided in FIG7 a ;

[0061] FIG8 b is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG7 a ;

[0062] FIG8 c is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG7 a ;

[0063] FIG8 d is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG7 a ;

[0064] FIG8e is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG7a;

[0065] FIG8 f is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG7 a ;

[0066] FIG8g is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG7a;

[0067] FIG9a is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0068] FIG9 b is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0069] FIG10 a is a schematic diagram of a flow path of an operating mode of the energy storage device provided in FIG9 a ;

[0070] FIG10 b is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG9 a ;

[0071] FIG10c is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG9a;

[0072] FIG10 d is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG9 a ;

[0073] FIG10e is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG9a;

[0074] FIG10f is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG9a;

[0075] FIG10g is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG9a;

[0076] FIG11a is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0077] FIG11b is another schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0078] FIG12a is a schematic diagram of a flow path of an operating mode of the energy storage device provided in FIG11a;

[0079] FIG12 b is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG11 a ;

[0080] FIG12c is a schematic diagram of a flow path of another operating mode of the energy storage device provided in FIG11a;

[0081] FIG13a is another schematic structural diagram of an energy storage device group provided in an embodiment of the present application;

[0082] FIG13b is another structural schematic diagram of the energy storage device group provided in an embodiment of the present application;

[0083] FIG14 is a schematic structural diagram of a solar storage system provided in an embodiment of the present application;

[0084] FIG15 is a schematic diagram of a structure of a charging network provided in an embodiment of the present application.

[0085] Reference numerals: 100 - energy storage device; 10 - housing; 1 - thermal management module; 101 - housing; 1011 - first interface; 1012 - second interface; 102 - multi-way valve; 103 - first evaporator; 104 - first throttle valve; 105 - condenser; 1061 - first water pump; 1062 - second water pump; 1063 - third water pump; 107 - electric heater; 108 - dehumidification module; 1081 - second evaporator; 1082 - second throttle valve; 2 - compressor; 3 - battery module; 301 - battery; 302 - battery heat exchange plate; 4 - power module; 4a - first power unit; 401 - first power circuit; 402 - first power circuit heat exchange plate; 403 - first bypass valve; 4b - second power unit; 404 - second power circuit; 405 - second power circuit heat exchange plate; 406 - second bypass valve; 5 - radiator module; 501, 501a, 501b - radiators; 502 - fan; 6 - third bypass valve; 7 - liquid supply port; 8 - liquid return port; 9a - first three-way valve; 9b - second three-way valve. DETAILED DESCRIPTION

[0086] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all explained using the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0087] It should be noted that the following description sets forth specific details to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotations of the embodiments of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0088] To facilitate understanding of the energy storage device provided in the embodiments of this application, the following first introduces its application scenarios. The energy storage device provided in the embodiments of this application can be applied to five types of industrial and commercial energy storage scenarios, including small-scale industrial and commercial (such as small factories, etc.), medium-sized industrial and commercial, large-scale industrial and commercial, photovoltaic storage and charging stations, and small and medium-sized microgrids (such as islands, etc.), as well as three types of power station scenarios, including wind and solar energy storage power stations, grid energy storage power stations, and large microgrids, for storing and releasing electrical energy.

[0089] At present, according to the different requirements of the application scenario for power consumption, energy storage equipment can also be divided into module-level energy storage equipment, cabinet-level energy storage equipment and container-level energy storage equipment. Referring to Figure 1, Figure 1 is a structural block diagram of the energy storage device 100 provided in an embodiment of the present application. The energy storage device 100 may include a box body 10 and a battery module 3 and a power module 4 arranged in the box body 10. Among them, the battery in the battery module 3 is the basic unit for the energy storage device 100 to realize the storage and release of electric energy. During the charging and discharging process of the battery, a lot of heat will be generated. In order to ensure the charging and discharging performance and safety of the battery, it is usually necessary to cool the battery. In addition, the power module 4 can be used to control the charging and discharging process of the battery. In this application, the type of power module is not limited. For example, the power module 4 may include a power conversion system (PCS) or a direct current converter (DCDC). Among them, the PCS can be used to convert AC power into DC power and then provide it to the battery, or convert DC power from the battery into AC power. In the present application, the PCS can specifically be a DC-AC converter or a DC-DC converter, that is, the PCS can include a DC-AC converter device, or a DC-DC converter device or a control unit, etc. The DCDC can be used to boost the battery module 3 to ensure that the total voltage of the battery module 3 is not lower than the rated voltage, thereby improving the operating stability of the battery module 3. The power module 4 also generates a large amount of heat during operation, especially when operating under certain overload conditions, the heat generated by the power module 4 is even greater. If the power module 4 cannot be cooled in a timely manner, the operating reliability and safety of the power module 4 will be affected.

[0090] Based on this, current energy storage devices are also equipped with a heat dissipation system. Since liquid cooling mainly relies on the circulation of coolant (such as water) in the coolant pipes to achieve heat dissipation, its heat dissipation efficiency is relatively high. Therefore, more and more energy storage devices are currently adopting liquid cooling systems.

[0091] In view of this, the energy storage device provided in the embodiments of this application can utilize liquid cooling to dissipate heat from the battery and power module in various operating modes, thereby achieving efficient temperature control of the battery and power module, which is beneficial for improving the energy efficiency of the energy storage device. To make the objectives, technical solutions, and advantages of this application more clear, this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0092] Referring to Figure 2a, Figure 2a is a structural schematic diagram of an energy storage device provided in an embodiment of the present application. In the present application, the energy storage device 100 may include a thermal management module 1, a compressor 2, a battery module 3, a first power unit 4a, a second power unit 4b, and a radiator module 5. The thermal management module 1 includes a housing 101 and a multi-way valve 102, a first evaporator 103, a first throttle valve 104, and a condenser 105 disposed within the housing 101. The housing 101 includes a plurality of first interfaces 1011 and two second interfaces 1012. The first interface 1011 can be used to connect to a coolant pipe, and the second interface 1012 can be used to connect to a refrigerant pipe. The refrigerant pipe refers to a pipe for circulating a refrigerant, wherein the refrigerant may be, but is not limited to, Freon or liquid ammonia compounds; in addition, the coolant pipe refers to a pipe for circulating a coolant, wherein the coolant may be, but is not limited to, water or ethylene glycol. Since the energy storage device 100 provided in the embodiment of the present application includes both a circuit formed by connecting refrigerant pipes and a circuit formed by connecting coolant pipes, in order to facilitate the distinction between different pipes in the various drawings of the embodiment of the present application, the coolant pipes are represented by dotted lines and the refrigerant pipes are represented by solid lines.

[0093] In the energy storage device 100 provided in the embodiment of the present application, the two coolant ports of the first evaporator 103 are connected to the multi-way valve, and the two coolant ports of the condenser 105 are connected between the multi-way valve 102 and a first interface 1011. The multi-way valve 102 can be used to connect or disconnect the coolant passages between the first evaporator 103 and the condenser 105 and other structures.

[0094] In addition, in the energy storage device 100 shown in FIG2a, the compressor 2 is arranged outside the housing 101 of the thermal management module 1, and the compressor 2 is connected between the two second interfaces 1012, and the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103 are connected in sequence through the refrigerant pipe to form a refrigerant circulation loop. In the energy storage device 100 provided in the embodiment of the present application, the compressor 2 can not only be arranged outside the housing 101 of the thermal management module 1 as shown in FIG2a, but can also be arranged inside the housing 101 of the thermal management module 1. When the compressor 2 is arranged inside the housing 101 of the thermal management module 1, the housing 101 of the thermal management module 1 does not have the second interface 1012, which can improve the integration of the energy storage device 100.

[0095] Continuing with Figure 2a, the battery module 3 includes batteries 301 and a battery heat exchange plate 302. The batteries 301 are in contact with the battery heat exchange plate 302. The two coolant ports of the battery heat exchange plate 302 are each connected to the multi-way valve 102 via a first interface 1011. In a specific implementation, the coolant inlet and outlet ports of the battery heat exchange plate 302 are each connected to the multi-way valve 102 via a first interface 1011. The multi-way valve 102 can then be used to connect or disconnect the coolant passage between the battery heat exchange plate 302 and other structures.

[0096] It is worth mentioning that in the energy storage device provided in the embodiment of the present application, the battery heat exchange plate 302 can be a cold plate or other type of heat exchanger such as an immersion heat exchanger, as long as it can be used for the circulation of coolant and can be used to achieve heat exchange with the battery 301. In addition, the two coolant ports of the battery heat exchange plate 302 can be connected to the corresponding first interface 1011 in a direct or indirect manner, wherein the direct connection between the coolant port and the corresponding first interface 1011 means that only a coolant pipe is provided between the coolant port and the corresponding first interface 1011, and the indirect connection between the coolant port and the corresponding first interface 1011 means that other devices are also connected in series between the coolant port and the corresponding first interface 1011 through the coolant pipe.

[0097] In the embodiment of the present application, the multi-way valve 102 can be used to connect or disconnect the coolant passage between the first evaporator 103 and the battery heat exchange plate 302. When the multi-way valve 102 connects the two coolant ports of the first evaporator 103 to the coolant passage between the battery heat exchange plate 302, the coolant flowing through the first evaporator 103 can be cooled by the refrigerant circulation circuit. This allows the coolant to circulate between the first evaporator 103 and the battery heat exchange plate 302, thereby dissipating heat from the battery heat exchange plate 302 and, in turn, from the battery 301.

[0098] Continuing with Figure 2a, the first power unit 4a includes a first power circuit 401 and a first power circuit heat exchange plate 402, wherein the first power circuit 401 may include a PCS. The first power circuit heat exchange plate 402 contacts the first power circuit 401 to dissipate heat from the first power circuit 401 through the circulation of coolant within the first power circuit heat exchange plate 402. When the first power circuit heat exchange plate 402 is connected to the thermal management module 1, the two coolant ports of the first power circuit heat exchange plate 402 are respectively connected to the multi-way valve 102 via a first interface 1011. Specifically, the coolant inlet port and the coolant outlet port of the first power circuit heat exchange plate 402 are respectively connected to the multi-way valve 102 via a first interface 1011. The multi-way valve 102 can then be used to connect or disconnect the coolant passage between the first power circuit heat exchange plate 402 and other structures. It is worth mentioning that in the energy storage device 100 provided in the embodiment of the present application, the first power circuit heat exchange plate 402 can be a cold plate or other type of heat exchanger, such as an immersion heat exchanger, as long as it can be used for the circulation of coolant and can be used to achieve heat exchange with the first power circuit 401. In addition, when the battery heat exchange plate 302 and the first power circuit heat exchange plate 402 are both immersion evaporators, they can also be integrated, that is, the battery 301 and the first power circuit 401 can be immersed in the same heat exchanger.

[0099] In an embodiment of the present application, the two coolant ports of the first power circuit heat exchange plate 402 can also be connected to the corresponding first interfaces 1011 in a direct or indirect manner. The specific implementation method can be referred to the corresponding description above and will not be repeated here. For example, in the energy storage device shown in Figure 2a, the first power circuit heat exchange plate 402 and the battery heat exchange plate 302 are connected in series and connected between the two first interfaces 1011 to achieve an indirect connection between the two coolant ports of the first power heat exchange plate 402 and the corresponding first interfaces 1011, and to achieve an indirect connection between the two coolant ports of the battery heat exchange plate 302 and the corresponding first interfaces 1011.

[0100] Furthermore, it is understood that in the energy storage device shown in FIG2a , the battery heat exchange plate 302 and the first power circuit heat exchange plate 402 are connected in series and are connected between the two valve ports of the multi-way valve 102 via the first interface 1011. This allows the multi-way valve 102 to connect the coolant passage between the first power circuit heat exchange plate 402, the battery heat exchange plate 302, and the first evaporator 103, thereby connecting the first power circuit heat exchange plate 402, the battery heat exchange plate 302, and the first evaporator 103 to the same coolant circulation loop. In this way, the first power circuit heat exchange plate 402 can be cooled by the coolant cooled by the refrigerant circulation loop, thereby improving the heat dissipation efficiency of the first power circuit heat exchange plate 402 and meeting the heat dissipation requirements of the first power circuit 401 when operating under high heat generation conditions such as overload, thereby improving the operational reliability of the energy storage device 100.

[0101] In the present application, in addition to the method shown in FIG2a , the first power unit 4a can also be connected to the first evaporator 103 in other possible ways. For example, referring to FIG2b , FIG2b is another schematic diagram of the structure of the energy storage device 100 provided in an embodiment of the present application. Unlike the energy storage device 100 shown in Figure 2a, in the energy storage device 100 shown in Figure 2b, the first power circuit heat exchange plate 402 and the battery heat exchange plate 302 are connected in parallel and are connected between the two valve ports of the multi-way valve 102 through the first interface 1011, wherein one coolant port of the first power circuit heat exchange plate 402 and one coolant port of the battery heat exchange plate 302 are both connected to one first interface, and another coolant port of the first power circuit heat exchange plate 402 and another coolant port of the battery heat exchange plate 302 are both connected to another first interface, so that the two coolant ports of the first power circuit heat exchange plate 402 and the two coolant ports of the battery heat exchange plate 302 can be connected to the two valve ports of the multi-way valve 102 in a one-to-one correspondence. In this way, the cooling path between the first power circuit heat exchange plate 402 and the first evaporator 103 can still be connected through the multi-way valve 102. The other structures of the first power unit 4a of the energy storage device 100 shown in Figure 2b can be set with reference to Figure 2a and will not be described in detail here. The connection method of the coolant passage between the first power unit 4a and the first evaporator 103 is not limited to this. For example, when the multi-way valve 102 has more valve ports, the two coolant ports of the first power circuit heat exchange plate 402 and the two coolant ports of the battery heat exchange plate 302 are respectively connected to different valve ports of the multi-way valve 102 through different first interfaces 1011, so that the first power circuit heat exchange plate 402 and the battery heat exchange plate 302 can also be respectively connected between different valve ports of the multi-way valve 102, which are not listed one by one here.

[0102] Continuing with Figure 2a, the second power unit 4b includes a second power circuit 404 and a second power circuit heat exchange plate 405, wherein the second power circuit 404 includes a DC-DC converter. The second power circuit heat exchange plate 405 contacts the second power circuit 404 to dissipate heat from the second power circuit 404 via the circulation of coolant within the second power circuit heat exchange plate 405. When connecting the second power circuit heat exchange plate 405 to the thermal management module 1, the two coolant ports of the second power circuit heat exchange plate 405 are each connected to the multi-way valve 102 via a first interface 1011. Specifically, the coolant inlet and outlet ports of the second power circuit heat exchange plate 405 are each connected to the multi-way valve 102 via a first interface 1011. The multi-way valve 102 can then be used to connect or disconnect the coolant passage between the second power circuit heat exchange plate 405 and other structures.

[0103] It is worth mentioning that in the energy storage device 100 provided in the embodiment of the present application, the second power circuit heat exchange plate 405 can be a cold plate or other type of heat exchanger, such as an immersion heat exchanger, as long as it can be used for the circulation of coolant and can be used to achieve heat exchange with the second power circuit 404. In addition, when the battery heat exchange plate 302 and the second power circuit heat exchange plate 405 are both immersed evaporators, they can also be integrated, that is, the battery 301 and the second power circuit 404 can be immersed in the same heat exchanger.

[0104] In the embodiment of the present application, the two coolant ports of the second power circuit heat exchange plate 405 can also be connected to the corresponding first interface 1011 in a direct or indirect manner. The specific implementation method can refer to the corresponding description above and will not be repeated here.

[0105] In addition, in the energy storage device shown in Figure 2a, the second power circuit heat exchange plate 405 and the condenser 105 can be connected in series through the first interface 1011 and connected between the two valve ports of the multi-way valve 102, so that the second power circuit heat exchange plate 405 and the condenser 105 are connected in series to the same coolant circulation loop.

[0106] In some possible embodiments of the present application, the second power circuit heat exchange plate 405 can also be connected in parallel with the condenser 105 via the first interface 1011 and connected between the two valve ports of the multi-way valve 102, thereby integrating the condenser 105 and the second power circuit heat exchange plate 405 into the same coolant circulation loop. For example, see Figure 2c, which is another schematic diagram of the structure of the energy storage device 100 provided in an embodiment of the present application. Unlike the energy storage device 100 shown in Figure 2a, in the energy storage device 100 shown in Figure 2c, one coolant port of the second power circuit heat exchange plate 405 and one coolant port of the condenser 105 are both connected to the same valve port of the multi-way valve 102, and another coolant port of the second power circuit heat exchange plate 405 and another coolant port of the condenser 105 are both connected to another valve port of the multi-way valve 102, or when the multi-way valve 102 has more valve ports, another coolant port of the second power circuit heat exchange plate 405 and another coolant port of the condenser 105 are respectively connected to different valve ports of the multi-way valve 102, or the two coolant ports of the second power circuit heat exchange plate 405 and the two coolant ports of the condenser 105 can also be respectively connected to different valve ports of the multi-way valve 102, as long as the coolant circulation loop of the condenser 105 and the coolant circulation loop of the second power circuit heat exchange plate 405 can be connected in parallel, and they are not listed one by one here. In addition, other structures of the second power unit 4b of the energy storage device 100 shown in FIG2c can be configured with reference to FIG2b and will not be described in detail here.

[0107] It is worth mentioning that in the present application, in addition to the above-mentioned setting method, the first power unit 4a and the second power unit 4b can also adopt other possible setting methods. For example, in the energy storage device 100 shown in Figure 2d, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 can be connected in series with the battery heat exchange plate 302 and then connected between the two valve ports of the multi-way valve 102 through the first interface; as in Figure 2e, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are connected in parallel and then connected in series with the battery heat exchange plate 302 and connected between the two valve ports of the multi-way valve 102 through the first interface; as in Figure 2f, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are both connected to the battery heat exchange plate 302. 02 in parallel and connected between the two valve ports of the multi-way valve 102 through the first interface; for example, in the energy storage device 100 shown in FIG2g, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 can both be connected in series with the condenser 105 and then connected between the two valve ports of the multi-way valve 102 through the first interface; for example, in the energy storage device 100 shown in FIG2h, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are connected in parallel and then connected in series with the condenser 105 and connected between the two valve ports of the multi-way valve 102 through the first interface; as shown in FIG2i, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are both connected in parallel with the condenser 105 and connected between the two valve ports of the multi-way valve 102 through the first interface. They are not listed one by one here.

[0108] 2a, the radiator module 5 includes a radiator 501, and the two coolant ports of the radiator 501 are respectively connected to the multi-way valve 102 through a first interface 1011. In a specific implementation, the coolant inlet port and the coolant outlet port of the radiator 501 are respectively connected to the multi-way valve 102 through a first interface 1011. The multi-way valve 102 can be used to connect or disconnect the coolant passage between the radiator 501 and other structures. It is worth mentioning that in the energy storage device 100 shown in FIG2a, the radiator 501 and the battery heat exchange plate 302 are connected to two different first interfaces, and the radiator 501 and the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are all connected to two different first interfaces, so as to improve the flexibility of the location of the radiator 501. The radiator 501 can be flexibly connected or disconnected with other structures through the multi-way valve 102, so as to facilitate the connection of the radiator 501 to the coolant circuit of other structures, thereby dissipating heat from the other structures through the radiator 501.

[0109] For example, in the embodiment of the present application, when the multi-way valve 102 connects the coolant passage between the radiator 501 and the battery heat exchange plate 302, heat from the battery heat exchange plate 302 can be transferred to the radiator 501 via the coolant in the coolant pipe. After cooling by the radiator 501, the coolant can flow back to the battery heat exchange plate 302, thereby enabling the radiator 501 to dissipate heat from the battery 301. Furthermore, when the multi-way valve 102 connects the coolant passage between the radiator 501 and the second power circuit heat exchange plate 405, heat from the second power circuit heat exchange plate 405 can be transferred to the radiator 501 via the coolant pipe, thereby enabling the radiator 501 to dissipate heat from the second power circuit 404, thereby maintaining the second power circuit 404 within a normal operating temperature range.

[0110] In addition, the radiator module 5 may further include a fan 502, which is disposed proximate to the radiator 501. The fan 502 may be used to accelerate the circulation speed of air flowing through the radiator 501, thereby improving the heat dissipation performance of the radiator 501. It is understood that the number of fans 502 in the radiator module 5 may be selected based on specific application scenarios. For example, in a high-temperature environment, the number of fans 502 in the radiator module 5 may be increased to increase the circulation speed of air flowing through the radiator 501, thereby improving the heat dissipation efficiency of the radiator 501 for the coolant in the coolant pipe.

[0111] In addition to the above-mentioned structure, the energy storage device 100 provided in the embodiment of the present application may also be provided with other possible structures according to specific application scenarios. For example, reference may be made to FIG2j, which is another structural schematic diagram of the energy storage device 100 provided in the embodiment of the present application. In the energy storage device 100 shown in FIG2j, the first power unit 4a may further include a first bypass valve 403, the two coolant ports of the first bypass valve 403 may be connected in a one-to-one correspondence with the two coolant ports of the first power circuit heat exchange plate 402, so that the first bypass valve 403 is connected in parallel with the first power circuit heat exchange plate 402. In this way, when the energy storage device 100 is in a relatively low temperature environment, the first power circuit 401 has a relatively low demand for heat dissipation by the coolant cooled by the refrigerant circulation loop. At this time, the first bypass valve 403 can be opened so that when the coolant cooled by the refrigerant circulation loop flows through the first power unit 4a, part of the coolant flows through the first bypass valve 403, thereby reducing the amount of coolant flowing through the first power circuit heat exchange plate 402, which is beneficial to improving the energy efficiency of the energy storage device 100.

[0112] Similarly, in the energy storage device 100 shown in FIG. 2 j , the second power unit 4b may further include a second bypass valve 406. The two coolant ports of the second bypass valve 406 may be connected in a one-to-one correspondence with the two coolant ports of the second power circuit heat exchange plate 405, so that the second bypass valve 406 and the second power circuit heat exchange plate 405 are connected in parallel. In this way, when the energy storage device 100 is in a relatively low temperature environment, the heat dissipation requirement of the second power circuit 404 is relatively low. At this time, the second bypass valve 406 can be opened to allow a portion of the coolant flowing through the second power unit 4b to flow through the second bypass valve 406, thereby reducing the amount of coolant flowing through the second power circuit heat exchange plate 405, which is beneficial for improving the energy efficiency of the energy storage device 100.

[0113] It is worth mentioning that in the energy storage device 100 provided in each embodiment of the present application, the first power unit 4a may be provided with a first bypass valve 403 or may not be provided with the first bypass valve 403, and the second power unit 4b may be provided with a second bypass valve 406 or may not be provided with the second bypass valve 406, which can be specifically set according to the specific application scenario.

[0114] In addition, the energy storage device 100 in Figure 2j also adds a third bypass valve 6 for the compressor 2, which is arranged in parallel with the compressor 2. Thus, when the compressor 2 is operating in the heating state, the third bypass valve 6 opens to reduce the pressure of the compressor 2, thereby allowing the heat generated by the compressor 2 itself to heat the battery 301. When the compressor is operating in the cooling state, the third bypass valve 6 closes. It is understood that when the heat generated by the compressor 2 itself can meet the heating requirements of the battery 301, the electric heater 107 in the energy storage device 100 can be removed, which helps improve the energy efficiency of the energy storage device 100.

[0115] It is worth mentioning that in the present application, the first bypass valve 403, the second bypass valve 406 and the third bypass valve 6 can be, for example, valves with a shut-off function such as solenoid valves, one-way valves or ball valves, and the types of the first bypass valve 403, the second bypass valve 406 and the third bypass valve 6 can be the same or different.

[0116] In addition, a dehumidification module 108 may also be provided in the energy storage device 100 shown in FIG2j . The dehumidification module 108 includes a second evaporator 1081 and a second throttle valve 1082 connected via a refrigerant pipe. In the energy storage device 100 shown in FIG2j , the compressor 2, the dehumidification module 108, and the condenser 105 are sequentially connected via the refrigerant pipe to form a dehumidification cycle. Since the temperature of the second evaporator 1081 is relatively low during the circulation of the refrigerant in the loop formed by the compressor 2, the dehumidification module 108, and the condenser 105, when the ambient humidity is high and the temperature of the second evaporator 1081 is lower than the dew point temperature of the air, the water vapor in the air condenses into water droplets, which are then discharged through the drainage pipe to reduce the humidity in the energy storage device 100.

[0117] Because the second evaporator 1081 has a lower temperature, it can also lower the temperature of the air within the energy storage device 100, which helps keep the battery in a lower temperature environment. Furthermore, the dehumidification module 108 can also include a fan, which can be positioned near the second evaporator 1081 to accelerate the flow of air through the second evaporator 1081, thereby lowering the temperature of the second evaporator 1081 and improving the dehumidification effect of the dehumidification module 108.

[0118] In the energy storage device 100 shown in FIG2j , the circulation loop formed by the battery heat exchange plate 302 and the radiator 501 can effectively reduce the surface temperature of the battery 301. Furthermore, the lower temperature of the second evaporator 1081 in the dehumidification module 108 can effectively reduce the temperature of the air within the energy storage device 100, thereby effectively improving the heat dissipation effect on the battery 301. Furthermore, the second evaporator 1081 in the dehumidification module 108 can condense moisture within the energy storage device 100, thereby reducing the humidity of the air within the energy storage device 100. This allows the battery 301 to operate in a relatively dry environment, which helps ensure the reliability and service life of the battery 301.

[0119] It is understood that in the embodiment provided in FIG2j, the combination of the second evaporator 1081 and the second throttle valve 1082 is arranged in parallel with the combination of the first evaporator 103 and the first throttle valve 104, so that the two do not affect each other. Specifically, when performing dehumidification, the second throttle valve 1082 can be opened and the first throttle valve 104 can be closed, so that the refrigerant can circulate in the circulation loop composed of the compressor 2, the condenser 105, the second throttle valve 1082 and the second evaporator 1081, thereby making the second evaporator 1081 have a lower temperature to achieve the dehumidification function. In addition, the first throttle valve 104 and the second throttle valve 1082 can be opened at the same time, that is, the refrigerant can circulate in the circulation loop composed of the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103, and can also circulate in the circulation loop composed of the compressor 2, the condenser 105, the second throttle valve 1082 and the second evaporator 1081. As a result, both the first evaporator 103 and the second evaporator 1081 have relatively low temperatures. That is, the first evaporator 103 can cool the battery 301, while the second evaporator 1081 can dehumidify the battery. Of course, in practice, the first throttle valve 104 can be opened and the second throttle valve 1082 closed, allowing the refrigerant to circulate in the loop consisting of the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103. This allows the first evaporator 103 to have a relatively low temperature, thereby cooling the battery 301.

[0120] In summary, in the energy storage device 100 provided in FIG2j of the present application, the first evaporator 103 and the second evaporator 1081 in the thermal management module 1 are decoupled from each other, which can avoid mutual influence between the two. In addition, the combination of the first evaporator 103 and the first throttle valve 104 and the combination of the second evaporator 1081 and the second throttle valve 1082 share the same condenser 105 and compressor 2, thereby effectively reducing the number of components used, which is conducive to reducing the volume and cost of the adjustment device and facilitating the realization of an integrated design. Of course, in other possible embodiments, the first evaporator 103 and the second evaporator 1081 can also be arranged in series, so that the first evaporator 103 and the second evaporator 1081 can share a throttle valve. For example, only the first throttle valve 104 or the second throttle valve 1082 can be set, thereby reducing the number of components used, which is conducive to reducing production costs.

[0121] It is worth mentioning that in the embodiment of the present application, the provision of the dehumidification module 108 is independent of the bypass of the compressor 2, that is, the dehumidification module 108 and the third bypass valve 6 at the compressor 2 can be provided at different times. For example, the third bypass valve 6 is not provided at the compressor 2, but the dehumidification module 108 is provided in the thermal management system, or the third bypass valve 6 is provided at the compressor 2, but the dehumidification module 108 is not provided in the thermal management system.

[0122] In addition to the aforementioned structure, the energy storage device 100 provided in the embodiment of the present application may also include water pumps in each coolant circulation loop, wherein the number and location of the water pumps may be determined based on the specific application scenario. Furthermore, when the energy storage device 100 operates in a relatively low temperature environment, to meet the heating requirements of the battery 301, the energy storage device 100 may also include an electric heater. The electric heater may be connected in series to the coolant loop where the battery heat exchange plate 302 is located, and may be turned on or off as needed.

[0123] During operation, the energy storage device 100 provided in the embodiment of the present application can effectively regulate the connection and disconnection states of different first interfaces through the multi-way valve 102, thereby flexibly adjusting the connection states of different modules, so that when the energy storage device 100 operates in various modes, the temperature of the battery module 3, the first power unit 4a, and the second power unit 4b can be regulated by circulating the coolant between the modules connected by the coolant pipe. This can effectively improve the efficiency of temperature regulation of the battery module 3, the first power unit 4a, and the second power unit 4b, thereby helping to improve the operating energy efficiency of the energy storage device 100. In addition, in the energy storage device 100 provided in the embodiment of the present application, by integrating the various structures of the thermal management module 1 into a housing 101, the integration of the thermal management module 1 can be effectively improved, which facilitates the connection between the thermal management module 1 and other modules and saves the pipelines connecting the thermal management module 1 with other modules, thereby helping to reduce the cost of the energy storage device 100.

[0124] The above describes the basic design principles of the heat dissipation system architecture of the energy storage device 100 provided in this application. Next, the operating modes of the energy storage device 100 under different working conditions are described using the energy storage device shown in FIG. 2 a as an example.

[0125] In the energy storage device 100 shown in FIG2 a , the multi-way valve 102 of the thermal management module 1 is an eight-way valve, and the eight-way valve includes eight valve ports, each of which can be used to connect to the first evaporator 103 , the condenser 105 , or the at least one first interface 1011 .

[0126] In practical applications, the connection or disconnection state between the first evaporator 103, the condenser 105 and different first interfaces 1011 can be effectively adjusted through the multi-way valve 102 according to actual needs, so that the energy storage device 100 can operate in the corresponding operating mode.

[0127] For example, when the ambient temperature is high (such as in high temperature and high humidity in summer), reference may be made to FIG3a, which is a schematic diagram of the flow path of an operating mode of the energy storage device 100 provided in FIG2a. FIG3a shows three circulation loops in this operating mode:

[0128] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0129] In the second circulation path, multi-way valve 102 connects the passages between battery heat exchange plate 302, first power circuit heat exchange plate 402, and first evaporator 103, thereby sequentially connecting battery heat exchange plate 302, first power circuit heat exchange plate 402, first water pump 1061, first evaporator 103, and electric heater 107 through the coolant channel. Since the temperature of first evaporator 103 is relatively low at this point, it can cool the coolant circulating in this circulation loop. The coolant cooled by first evaporator 103 can then exchange heat with battery heat exchange plate 302 and first power circuit heat exchange plate 402, thereby lowering the temperature of both.

[0130] In the third circulation path, multi-way valve 102 connects the passages between condenser 105, second power circuit heat exchange plate 405, and radiator 501, thereby sequentially connecting condenser 105, second power circuit heat exchange plate 405, radiator 501, and second water pump 1062 through the coolant channel. As the coolant circulates through this circulation loop, it can cool the condenser 105 and second power circuit heat exchange plate 405 via radiator 501, thereby cooling the condenser 105 and second power circuit heat exchange plate 405 and dissipating heat from the condenser 105 and second power circuit heat exchange plate 405. Furthermore, in this circulation loop, the configuration of second water pump 1062 can be adjusted so that the cooling water, after being cooled by radiator 501, flows first through second power circuit heat exchange plate 405 and then through condenser 105, thereby improving the heat dissipation efficiency of the second power circuit heat exchange plate 405.

[0131] It should be noted that, in the operating mode shown in FIG. 3 a , the electric heater 107 is in an off state.

[0132] In addition, the battery heat exchange plate 302 and the first power circuit heat exchange plate 402 can also be cooled by the radiator 501. For example, valve port 7 of the multi-way valve 102 can be connected to valve port 4, and valve port 1 can be connected to valve port 2, so that the passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the radiator 501 are connected through the multi-way valve 102. In this case, the coolant can circulate in a circulation loop that sequentially connects the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the first water pump 1061, the second water pump 1062, and the radiator 501.

[0133] In addition, when the ambient temperature is more suitable (such as in spring or autumn), the operation mode of the energy storage device 100 can refer to Figure 3b, which is a flow path diagram of another operation mode of the energy storage device 100 provided in Figure 2a.

[0134] Specifically, Figure 3b shows a circulation loop. The multi-way valve 102 connects the passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the condenser 105, and the radiator 501. This connects the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the first water pump 1061, the condenser 105, the second power circuit heat exchange plate 405, the second water pump 1062, the radiator 501, and the electric heater 107 in sequence through the coolant channel to form a circulation loop. As the coolant circulates through this circulation loop, the radiator 501 cools the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the second power circuit heat exchange plate 405, thereby dissipating heat from the battery 301 and the power circuit 301.

[0135] It is worth mentioning that in the operating mode shown in FIG3 b , the electric heater 107 is in the off state. Furthermore, since the heat dissipation requirements of the battery 301, the first power circuit 401, and the second power circuit 404 can be met solely by the radiator 501 when the ambient temperature is relatively suitable, the compressor 2, the first evaporator 103, and the condenser 105 are all in the off state in this operating mode.

[0136] When the ambient temperature is low (such as in winter), the operation mode of the energy storage device 100 can be referred to FIG3 c , which is a flow path diagram of another operation mode of the energy storage device 100 provided in FIG2 a .

[0137] In Figure 3c, multi-way valve 102 connects the passages between battery heat exchange plate 302, first power circuit heat exchange plate 402, and second power circuit heat exchange plate 405. This connects battery heat exchange plate 302, first water pump 1061, first power circuit heat exchange plate 402, second power circuit heat exchange plate 405, and electric heater 107 sequentially through the coolant channel to form a circulation loop. As the coolant circulates through this circulation loop, heat generated by first power circuit 401 and second power circuit 404 can be transferred to battery heat exchange plate 302, heating battery 301 and achieving efficient heat utilization. In this operating mode, electric heater 107 can be turned on or off as needed, which will not be detailed here.

[0138] It should be noted that in actual applications, when the ambient temperature is low, the first throttle valve 104 and the compressor 2 can be set to the open state as needed, that is, the working principle of the heat pump is used to make the condenser 105 have a higher temperature, so that the condenser 105 provides heat energy to the battery heat exchange plate 302. In specific implementation, please refer to Figure 3d, which is a flow path schematic diagram of another operating mode of the energy storage device 100 provided in Figure 2a. The battery heat exchange plate 302, the electric heater 107, the second power circuit heat exchange plate 405, the condenser 105, the first power circuit heat exchange plate 402 and the first water pump 1061 are connected in sequence through the coolant channel to form a circulation loop. In this way, while the condenser 105 provides heat energy to the battery heat exchange plate 302, the heat generated by the first power circuit 401 and the second power circuit 404 can also be provided to the battery heat exchange plate 302, thereby improving the energy efficiency of the energy storage device 100.

[0139] In this heat pump mode, the heat in the environment can be transferred to the condenser 105 through the first evaporator 103. Therefore, the temperature of the first evaporator 103 is relatively low. In order to dissipate the coldness of the first evaporator 103 and increase the temperature of the first evaporator 103, on the one hand, the first evaporator 103 can be heated by the electric heater 107; on the other hand, the heat of the first evaporator 103 can be increased through heat exchange between the radiator 501 and the first evaporator 103.

[0140] Furthermore, in the operating mode shown in FIG3 d , the electric heater 107 can be activated as needed to increase the temperature of the battery heat exchange plate 302. It is understood that when the energy storage device 100 is deployed in a relatively low-temperature region, the electric heater 107 can be installed as needed. However, when the energy storage device 100 is deployed in a relatively high-temperature region, the electric heater 107 can be omitted, thereby reducing deployment costs.

[0141] When the ambient temperature is low (such as in winter), and the heat generated by the first power circuit 401 and the second power circuit 404, as well as the heat generated by the condenser 105 in heat pump mode, cannot meet the heating requirements of the battery 301, the operating mode of the energy storage device 100 can be referred to in FIG3e, which is a flow path schematic diagram of another operating mode of the energy storage device 100 provided in FIG2a. In this mode, the electric heater 107 is turned on, and the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the first water pump 1061, the condenser 105, the second power circuit heat exchange plate 405, and the electric heater 107 are sequentially connected through the coolant pipe to form a circulation loop, so that the coolant circulating in the circulation loop is heated by the electric heater 107 to achieve heating of the battery 301. In addition, since the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are also connected in series in the above-mentioned passage, the heat generated by the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 can also be transferred to the battery heat exchange plate 302, thereby heating the battery 301.

[0142] It is worth mentioning that, in the operating mode shown in FIG. 3 e , the compressor 2 , the first evaporator 103 and the condenser 105 are all in a closed state.

[0143] In the above embodiment, the multi-way valve 102 is set as an eight-way valve, so that the multi-way valve 102 includes eight valve ports for connecting to the first evaporator 103, the condenser 105 or the first interface 1011. In actual applications, the number of interfaces of the multi-way valve 102 can also be adjusted according to specific needs. For example, referring to Figure 4a, Figure 4a is another structural schematic diagram of the energy storage device provided in an embodiment of the present application. Among them, the multi-way valve 102 of the energy storage device 100 shown in Figure 4a is a nine-way valve, and the multi-way valve 102 includes nine valve ports for connecting to the first evaporator 103, the condenser 105 or the first interface 1011.

[0144] In the energy storage device 100 shown in FIG4a , one coolant port of the second power circuit heat exchange plate and one coolant port of the condenser are both connected to the same valve port of multi-way valve 102, while another coolant port of the second power circuit heat exchange plate and another coolant port of the condenser are respectively connected to different valve ports of multi-way valve 102. This connects the coolant circulation loops of the second power circuit heat exchange plate and the coolant circulation loops of the condenser in parallel. The rest of the structure of the energy storage device shown in FIG4a is similar to that of the energy storage device shown in FIG2f , and will not be further described here.

[0145] In the present application, the energy storage device 100 shown in FIG. 4a may also be adaptively modified. For example, FIG. 4b is an exemplary diagram of another structural diagram of the energy storage device 100 provided in an embodiment of the present application. Compared to the energy storage device 100 shown in FIG. 4a , the energy storage device 100 in FIG. 4b adds a third bypass valve 6 to the compressor 2 and further includes a dehumidification module 108. The specific configuration of the third bypass valve 6 and the dehumidification module 108, as well as their achievable functions, can be referred to in the above-described embodiments and will not be described in detail here.

[0146] In addition, in actual applications, the energy storage device shown in Figure 4a can effectively adjust the connectivity between the coolant port of the first evaporator 103, the coolant port of the condenser 105 and different first interfaces through the multi-way valve 102 according to actual needs, so that the energy storage device 100 shown in Figure 4a can operate in the corresponding operating mode.

[0147] For example, when the ambient temperature is high (such as in high temperature and high humidity in summer), refer to Figure 5a, which is a schematic diagram of the flow path of an operating mode of the energy storage device 100 shown in Figure 4a. Figure 5a shows three circulation loops in this operating mode:

[0148] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0149] In the second circulation loop, the multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the first evaporator 103, thereby sequentially connecting the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the electric heater 107, the first water pump 1061, and the first evaporator 103 through the coolant passages. Since the temperature of the first evaporator 103 is relatively low at this point, the first evaporator 103 can cool the coolant circulating in this circulation loop. The coolant cooled by the first evaporator 103 can then exchange heat with the battery heat exchange plate 302 and the first power circuit heat exchange plate 402, thereby cooling the battery heat exchange plate 302 and the first power circuit heat exchange plate 402, thereby dissipating heat from the battery 301 and the first power circuit 401. This can meet the heat dissipation requirements of the first power circuit 401 under overload conditions, thereby ensuring the reliable operation of the energy storage device 100.

[0150] In the third circulation loop, multi-way valve 102 connects the coolant passage between the second power circuit heat exchange plate 405 and the radiator 501, thereby sequentially connecting the radiator 501, the second water pump 1062, and the second power circuit heat exchange plate 405 through the coolant passage. As the coolant circulates through this circulation loop, the radiator 501 cools the second power circuit heat exchange plate 405.

[0151] In the third circulation loop, multi-way valve 102 connects the coolant passage between condenser 105 and radiator 501, thereby sequentially connecting radiator 501, second water pump 1062, and condenser 105 through the coolant passage. As the coolant circulates through this circulation loop, radiator 501 cools condenser 105.

[0152] It should be noted that, in the operating mode shown in FIG. 5 a , the electric heater 107 is in an off state.

[0153] In addition, when the ambient temperature is more suitable (such as in spring or autumn), reference can be made to FIG5b, which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG4a. In this operating mode, the multi-way valve 102 connects the coolant passage between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the second power circuit heat exchange plate 405, and the radiator 501, thereby connecting the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the electric heater 107, the second water pump 1062, the second power circuit heat exchange plate 405, and the radiator 501 in sequence through the coolant channel to form a circulation loop. During the circulation of the coolant in this circulation loop, the radiator 501 can cool the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the second power circuit heat exchange plate 405, thereby achieving heat dissipation for the battery 301, the first power circuit 401, and the second power circuit 404.

[0154] It is worth mentioning that in the operating mode shown in FIG5 b , the electric heater 107 is in the off state. Furthermore, since the heat dissipation requirements of the battery 301, the first power circuit 401, and the second power circuit 404 can be met solely by the radiator 501 when the ambient temperature is relatively suitable, the compressor 2, the first evaporator 103, and the condenser 105 are all in the off state in this operating mode.

[0155] When the ambient temperature is low (such as in winter), reference may be made to FIG5 c , which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG4 a .

[0156] During the operation of the energy storage device 100, the first power circuit 401 and the second power circuit 404 always generate a large amount of heat. In winter, in order to ensure the charge and discharge performance of the battery 301 under low temperature conditions, the battery 301 needs to be heated. Based on this, it can be considered to use the heat generated by the first power circuit 401 and the second power circuit 404 to heat the battery 301. In specific implementation, as shown in Figure 5c, the multi-way valve 102 connects the coolant passage between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the second power circuit heat exchange plate 405, so that the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the electric heater 107, the second water pump 1062, and the second power circuit heat exchange plate 405 are connected in sequence through the coolant passage to form a circulation loop. Then, during the circulation of the coolant in this circulation loop, the heat generated by the first power circuit 401 and the second power circuit 404 can be transferred to the battery heat exchange plate 302 to heat the battery 301, thereby achieving efficient heat utilization. In this operation mode, the electric heater 107 can be turned on or off as needed, which will not be described in detail here.

[0157] In the operating mode shown in Figure 5c, the compressor 2, the first evaporator 103, and the condenser 105 are all in the closed state. In actual application, as shown in Figure 5d, the first throttle valve 104 and the compressor 2 can also be set to the open state as needed. That is, the working principle of the heat pump is used to make the condenser 105 reach a higher temperature, so that the battery heat exchange plate 302 can be heated by the condenser 105. In specific implementation, Figure 5d shows four circulation loops:

[0158] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103 which are sequentially connected through the refrigerant pipeline. When the refrigerant circulates in the circulation loop, the condenser 105 can have a higher temperature.

[0159] In the second circulation loop, multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the condenser 105. This connects the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the electric heater 107, the second water pump 1062, and the condenser 105 sequentially through the coolant passages. As the coolant circulates through this circulation loop, heat generated by both the first power circuit 401 and the condenser 105 are transferred to the battery heat exchange plate 302, thereby heating the battery 301.

[0160] In the third circulation loop, multi-way valve 102 connects the coolant passages between battery heat exchange plate 302, first power circuit heat exchange plate 402, and second power circuit heat exchange plate 405. This connects the battery heat exchange plate 302, first power circuit heat exchange plate 402, electric heater 107, second water pump 1062, and second power circuit heat exchange plate 405 sequentially through the coolant passages. As the coolant circulates through this circulation loop, heat generated by first power circuit 401 and second power circuit 404 are transferred to battery heat exchange plate 302, heating the battery 301.

[0161] In the fourth circulation loop, the multi-way valve 102 connects the coolant passage between the first evaporator 103 and the radiator 501, thereby connecting the first evaporator 103, the radiator 501, and the first water pump 1061 sequentially through the coolant passage. It is understood that in heat pump mode, ambient heat can be transferred to the condenser 105 via the first evaporator 103. Therefore, the temperature of the first evaporator 103 is relatively low. To dissipate the cooling energy of the first evaporator 103, the temperature of the first evaporator 103 is increased. On the one hand, the first evaporator 103 can be heated by the electric heater 107; on the other hand, the heat of the first evaporator 103 can be increased through heat exchange between the radiator 501 and the first evaporator 103.

[0162] When the ambient temperature is low (such as in winter), and the heat generated by the first power circuit 401 and the second power circuit 404, as well as the heat generated by the condenser 105 in heat pump mode, cannot meet the heating needs of the battery 301, the operating mode of the energy storage device 100 is shown in Figure 5e, which is a flow path schematic diagram of another operating mode of the energy storage device 100 shown in Figure 4a. In this operating mode, the electric heater 107 is turned on, and the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the electric heater 107, the second water pump 1062, and the second power circuit heat exchange plate 405 are connected in sequence through the coolant pipe to form a circulation loop. The electric heater 107, the first power circuit 401, and the second power circuit 404 heat the coolant circulating in the circulation loop to achieve heating of the battery 301.

[0163] It is worth mentioning that, in the operating mode shown in FIG. 5 e , the compressor 2 , the first evaporator 103 and the condenser 105 are all in a closed state.

[0164] When the energy storage device 100 is operating under low ambient temperature conditions, in addition to heating the battery through the electric heater 107, other possible methods can also be used. For example, in the energy storage device 100 shown in FIG4b , the compressor 2 is connected in parallel with a third bypass valve 6. Thus, when the compressor 2 is operating in a heating state, the third bypass valve 6 opens to reduce the pressure of the compressor 2, thereby utilizing the heat generated by the compressor 2 itself to heat the battery 301. Other operating modes of the energy storage device 100 of FIG4b can be referred to as shown in FIG5a to FIG5e above, and will not be described in detail here.

[0165] Referring to Figure 6a, Figure 6a is another structural schematic diagram of the energy storage device provided in an embodiment of the present application. The multi-way valve of the energy storage device shown in Figure 6a is also a nine-way valve, but unlike the energy storage device shown in Figure 4a above, the two coolant ports of the first power circuit heat exchange plate 402 are connected to the two coolant ports of the second power circuit heat exchange plate 405 in a one-to-one correspondence. Specifically, one coolant port of the first power circuit heat exchange plate 402, one coolant port of the second power circuit heat exchange plate 405, and one coolant port of the condenser 105 are all connected to the same valve port of the multi-way valve 102, while the other coolant port of the first power circuit heat exchange plate 402 is connected to the same valve port of the condenser 105. Another coolant port is connected to different valve ports of the multi-way valve 102, another coolant port of the second power circuit heat exchange plate 405 and another coolant port of the condenser 105 are connected to different valve ports of the multi-way valve 102, and another coolant port of the first power circuit heat exchange plate 402 and another coolant port of the second power circuit heat exchange plate 405 are connected to the same valve port of the multi-way valve 102, so that the coolant circulation loop where the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 are located is connected in parallel with the coolant circulation loop where the condenser is located.

[0166] Continuing with Figure 6a, the battery heat exchange plate 302 and the first water pump 1061 are connected in series and then connected between the two valve ports of the multi-way valve 102. The coolant pipeline connecting the battery heat exchange plate 302 and the valve ports of the multi-way valve 102 can also be provided with a liquid supply port 7 and a liquid return port 8, wherein the liquid return port 8 is connected to the liquid inlet of the first water pump 1061, and the liquid supply port 7 is connected to the liquid outlet of the first water pump 1061. In addition, the liquid supply port 7 is connected to one coolant port of the first power circuit heat exchange plate 402 and one coolant port of the second power circuit heat exchange plate 405, and the liquid return port 8 is connected to the other coolant port of the first power circuit heat exchange plate 402 and another coolant port of the second power circuit heat exchange plate 405.

[0167] In this way, in scenarios where the heat dissipation requirements of the first power circuit 401 and the second power circuit 404 are high, such as in a high-temperature environment or overload operation, part of the low-temperature cooling water flowing out of the outlet of the first water pump 1061 for cooling the battery 301 can be introduced into the cooling liquid circulation loop of the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 through the liquid supply port 7, and part of the cooling water flowing through the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 is returned to the liquid inlet of the first water pump 1061 through the liquid return port 8, and then returned to the cooling liquid circulation loop where the battery heat exchange plate 302 is located, so as to ensure the balance of the cooling liquid in each cooling liquid circulation loop, and realize the heat dissipation of the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405, and thus realize the heat dissipation of the first power circuit 401 and the second power circuit 404.

[0168] It is worth mentioning that in the present application, the specific relative positions of the liquid feeding port 7 and the liquid return port 8 and the battery heat exchange plate 302 are not limited. For example, in the energy storage device shown in FIG6a, the liquid feeding port 7 and the liquid return port 8 are both located on the coolant pipe between the coolant inlet port of the battery heat exchange plate 302 and the multi-way valve 102; for another example, in the energy storage device shown in FIG6b, the liquid feeding port 7 and the liquid return port 8 are both located on the coolant pipe between the coolant inlet port of the battery heat exchange plate 302 and the multi-way valve 102, but the liquid inlet of the first water pump 1061 in FIG6a and FIG6b is not relative to the coolant pipe. The liquid outlets are arranged in opposite directions; for example, in the energy storage device shown in Figure 6c, the liquid supply port 7 and the liquid return port 8 are both located on the coolant pipeline between the coolant outlet port of the battery heat exchange plate 302 and the multi-way valve 102; for example, in the energy storage device shown in Figure 6d, the liquid supply port 7 and the liquid return port 8 are also both located on the coolant pipeline between the coolant outlet port of the battery heat exchange plate 302 and the multi-way valve 102, but the liquid inlet and the liquid outlet of the first water pump 1061 in Figure 6c and Figure 6d are arranged in opposite directions; for example, in the energy storage device 100 shown in Figure 6e, the liquid supply port 7 and the liquid return port 8 are respectively located on both sides of the battery heat exchange plate 302.

[0169] In addition, the liquid delivery port 7 can be directly or indirectly connected to the liquid outlet of the first water pump 1061, and the liquid return port 8 can be directly or indirectly connected to the liquid inlet of the first water pump 1061. These are not specifically limited in this application. As long as the coolant flowing out of the liquid outlet of the first water pump 1061 can flow to the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405, and the coolant flowing from the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405 to the liquid return port 8 can flow back to the first water pump 1061 through the liquid inlet of the first water pump 1061, it is sufficient. Furthermore, since the relative position of the first water pump 1061 and the battery heat exchange plate 302 is not limited, the specific locations of the liquid delivery port 7 and the liquid return port 8 can also be adjusted according to the location of the first water pump 1061, and they will not be described in detail here.

[0170] Under some possible working conditions, the first power circuit 401 and the second power circuit 404 have different heat dissipation requirements. In order to achieve independent control of the temperatures of the first power circuit 401 and the second power circuit 404, a reversing valve can be further set between a coolant port of the first power circuit heat exchange plate 402, a coolant port of the second power circuit heat exchange plate 405 and the liquid supply port 7, and between another coolant port of the first power circuit heat exchange plate 402, another coolant port of the second power circuit heat exchange plate 405 and the liquid return port 8. In a specific implementation, referring to FIG6b , the energy storage device 100 further includes a first three-way valve 9a and a second three-way valve 9b. A coolant port of the first power circuit heat exchange plate 402, a coolant port of the second power circuit heat exchange plate 405, and a liquid delivery port 7 are respectively connected to the three valve ports of the first three-way valve 9a in a one-to-one correspondence. Another coolant port of the first power circuit heat exchange plate 402, another coolant port of the second power circuit heat exchange plate 405, and a liquid return port 8 are respectively connected to the three valve ports of the second three-way valve 9b in a one-to-one correspondence. The connection and disconnection of each valve port of the two-way and three-way valves 9b are used to control the connection or disconnection status of a coolant port of the first power circuit heat exchange plate 402, a coolant port of the second power circuit heat exchange plate 405, and the liquid supply port 7, and to control the connection or disconnection status of another coolant port of the first power circuit heat exchange plate 402, another coolant port of the second power circuit heat exchange plate 405, and the liquid return port 8, thereby achieving independent regulation of the temperatures of the first power circuit 401 and the second power circuit 404, which is beneficial to improving the energy efficiency of the energy storage device 100.

[0171] The other structures of the energy storage device 100 shown in Figures 6a to 6e can be set with reference to Figures 4a and 4b, and the various operating modes of the energy storage device 100 shown in Figures 6a to 6e can be shown with reference to Figures 5a to 5e, which will not be described in detail here.

[0172] Referring to Figure 7a, which is another schematic diagram of the structure of an energy storage device 100 provided in an embodiment of the present application, in this energy storage device 100, the multi-way valve 102 of the thermal management module 1 is a ten-way valve, which can provide ten valve ports for connecting to the first evaporator 103, the condenser 105, or the first interface 1011.

[0173] In the energy storage device 100 shown in FIG7a , the first power circuit heat exchange plate 402 and the battery heat exchange plate 302 are respectively connected between different first interfaces, so that the two coolant ports of the first power circuit heat exchange plate 402 and the two coolant ports of the battery heat exchange plate 302 are respectively connected to different valve ports of the multi-way valve 102. As shown in FIG7a , the two coolant ports of the battery heat exchange plate 302 are respectively connected to valve ports 1 and 4 of the multi-way valve 102, and the two coolant ports of the first power circuit heat exchange plate 402 are respectively connected to valve ports 9 and 10 of the multi-way valve 102. The remaining structure of the energy storage device shown in FIG7a is similar to that of the energy storage device shown in FIG2a above and will not be described in detail here.

[0174] In the present application, the energy storage device 100 shown in FIG. 7a may also be adaptively modified. For example, FIG. 7b is an exemplary diagram of another structural diagram of the energy storage device 100 provided in an embodiment of the present application. Compared to the energy storage device 100 shown in FIG. 7a , the energy storage device 100 in FIG. 7b adds a third bypass valve 6 to the compressor 2 and further includes a dehumidification module 108. The specific configuration of the third bypass valve 6 and the dehumidification module 108, as well as their achievable functions, can be referred to in the above-described embodiments and will not be described in detail here.

[0175] In addition, in actual applications, the energy storage device 100 shown in Figure 7a can effectively adjust the connectivity between the coolant port of the first evaporator 103, the coolant port of the condenser 105 and different first interfaces 1011 through the multi-way valve 102 according to actual needs, so that the energy storage device 100 shown in Figure 7a can operate in the corresponding operating mode.

[0176] For example, when the ambient temperature is high (such as in high temperature and high humidity in summer), refer to Figure 8a, which is a schematic diagram of the flow path of an operating mode of the energy storage device 100 shown in Figure 7a. Figure 8a shows three circulation loops in this operating mode:

[0177] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0178] In the second circulation loop, the multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the first evaporator 103, thereby sequentially connecting the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the first power circuit heat exchange plate 402, and the first evaporator 103 through the coolant passages. Since the temperature of the first evaporator 103 is relatively low at this point, the first evaporator 103 can cool the coolant circulating in this circulation loop. The coolant cooled by the first evaporator 103 can then exchange heat with the battery heat exchange plate 302 and the first power circuit heat exchange plate 402, thereby cooling the battery heat exchange plate 302 and the first power circuit heat exchange plate 402, thereby dissipating heat from the battery 301 and the first power circuit 401. This can meet the heat dissipation requirements of the first power circuit 401 under overload conditions, thereby ensuring the reliable operation of the energy storage device 100.

[0179] In the third circulation loop, multi-way valve 102 connects the coolant passages between condenser 105, second power circuit heat exchange plate 405, and radiator 501, thereby sequentially connecting radiator 501, condenser 105, second power circuit heat exchange plate 405, and second water pump 1062 through the coolant passages. As the coolant circulates through this circulation loop, radiator 501 simultaneously cools condenser 105 and second power circuit heat exchange plate 405, thereby improving the energy efficiency of energy storage device 100.

[0180] It should be noted that, in the operating mode shown in FIG. 8 a , the electric heater 107 is in an off state.

[0181] In other possible embodiments, the battery heat exchange plate 302 can also be cooled by the radiator 501. For example, port 7 of the multi-way valve 102 can be connected to port 4, and port 1 to port 2. In this case, the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the second water pump 1062, and the radiator 501 are sequentially connected via the coolant pipe to form a circulation loop, allowing the coolant to circulate between the battery heat exchange plate 302 and the radiator 501, dissipating heat from the battery heat exchange plate 302 through the radiator 501.

[0182] In addition, when the ambient temperature is high (such as in high temperature and high humidity in summer), but the first power circuit heat exchange plate 402 is operating under rated load conditions, the heat dissipation of the first power circuit heat exchange plate 402 can also be dissipated through the radiator module 5. For specific implementation, please refer to Figure 8b, which is a flow path diagram of another operating mode of the energy storage device 100 shown in Figure 7a. Figure 8b shows four circulation loops in this operating mode:

[0183] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0184] In the second circulation loop, multi-way valve 102 connects the coolant passage between battery heat exchange plate 302 and first evaporator 103, thereby sequentially connecting battery heat exchange plate 302, electric heater 107, first water pump 1061, and first evaporator 103 through the coolant passage. Since the temperature of first evaporator 103 is relatively low at this point, it cools the coolant circulating in this circulation loop. The coolant, cooled by first evaporator 103, then exchanges heat with battery heat exchange plate 302, thereby cooling the battery heat exchange plate 302 and dissipating heat from battery 301.

[0185] In the third circulation loop, multi-way valve 102 connects the coolant passages between condenser 105, second power circuit heat exchange plate 405, and radiator 501, thereby sequentially connecting radiator 501, condenser 105, second power circuit heat exchange plate 405, and second water pump 1062 through the coolant passages. As the coolant circulates through this circulation loop, radiator 501 simultaneously cools condenser 105 and second power circuit heat exchange plate 405, thereby improving the energy efficiency of energy storage device 100.

[0186] In the fourth circulation loop, multi-way valve 102 connects the coolant passage between the first power circuit heat exchange plate 402 and the radiator 501, thereby sequentially connecting the radiator 501, the first power circuit heat exchange plate 402, and the second water pump 1062 through the coolant passage. As the coolant circulates through this circulation loop, the radiator 501 also cools the first power circuit heat exchange plate 402, thereby improving the energy efficiency of the energy storage device 100.

[0187] In addition, when the ambient temperature is relatively suitable (such as in spring or autumn), reference may be made to FIG8c, which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG7a. In this operating mode, the multi-way valve 102 connects the coolant passage between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the second power circuit heat exchange plate 405, and the radiator 501, thereby connecting the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the first power circuit heat exchange plate 402, the condenser 105, the second power circuit heat exchange plate 405, the second water pump 1062, and the radiator 501 in sequence through the coolant passage to form a circulation loop. As the coolant circulates in this circulation loop, the radiator 501 can cool the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the second power circuit heat exchange plate 405, thereby achieving heat dissipation for the battery 301, the first power circuit 401, and the second power circuit 404.

[0188] It is worth mentioning that in the operating mode shown in FIG8 c , the electric heater 107 is in the off state. Furthermore, since the heat dissipation requirements of the battery 301, the first power circuit 401, and the second power circuit 404 can be met solely by the radiator 501 when the ambient temperature is relatively suitable, the compressor 2, the first evaporator 103, and the condenser 105 are all in the off state in this operating mode.

[0189] When the ambient temperature is low (such as in winter), reference may be made to FIG8 d , which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG7 a .

[0190] During the operation of the energy storage device 100, the first power circuit 401 and the second power circuit 404 consistently generate a large amount of heat. In winter, in low temperatures, heating the battery 301 is necessary to ensure the charge and discharge performance of the battery 301. Therefore, it is possible to utilize the heat generated by the first power circuit 401 and the second power circuit 404 to heat the battery 301. In a specific implementation, as shown in FIG8d , the multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the second power circuit heat exchange plate 405. This connects the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the condenser 105, the second power circuit heat exchange plate 405, and the first power circuit heat exchange plate 402 sequentially through the coolant passages to form a circulation loop. As the coolant circulates through this circulation loop, the heat generated by the first power circuit 401 and the second power circuit 404 can be transferred to the battery heat exchange plate 302 to heat the battery 301, thereby achieving efficient heat utilization. In this operation mode, the electric heater 107 can be turned on or off as needed, which will not be described in detail here.

[0191] In the operating mode shown in Figure 8d, the compressor 2, the first evaporator 103, and the condenser 105 are all in the closed state. In actual application, as shown in Figure 8e, the first throttle valve 104 and the compressor 2 can also be set to the open state as needed. That is, the working principle of the heat pump is used to make the condenser 105 reach a higher temperature, so that the battery heat exchange plate 302 can be heated by the condenser 105. In specific implementation, Figure 8e shows three circulation loops:

[0192] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103 which are sequentially connected through the refrigerant pipeline. When the refrigerant circulates in the circulation loop, the condenser 105 can have a higher temperature.

[0193] In the second circulation loop, multi-way valve 102 connects the coolant passages between battery heat exchange plate 302, condenser 105, second power circuit heat exchange plate 405, and first power circuit heat exchange plate 402. This connects battery heat exchange plate 302, electric heater 107, first water pump 1061, condenser 105, second power circuit heat exchange plate 405, and first power circuit heat exchange plate 402 sequentially through the coolant passages. As the coolant circulates through this circulation loop, heat generated by first power circuit 401, second power circuit 404, and condenser 105 can all be transferred to battery heat exchange plate 302, thereby heating battery 301.

[0194] In the third circulation loop, the multi-way valve 102 connects the coolant passage between the first evaporator 103 and the radiator 501, thereby connecting the first evaporator 103, the radiator 501, and the second water pump 1062 sequentially through the coolant passage. It is understood that in heat pump mode, ambient heat can be transferred to the condenser 105 via the first evaporator 103. Therefore, the temperature of the first evaporator 103 is relatively low. To dissipate the cooling energy of the first evaporator 103, the temperature of the first evaporator 103 is increased. On the one hand, the first evaporator 103 can be heated by the electric heater 107; on the other hand, the heat of the first evaporator 103 can be increased through heat exchange between the radiator 501 and the first evaporator 103.

[0195] When the energy storage system 100 operates in heat pump mode, other possible circulation loops can be formed by connecting the battery heat exchange plate 302 and the condenser 105 in series. For example, refer to Figure 8f, which shows three circulation loops:

[0196] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103 which are sequentially connected through the refrigerant pipeline. When the refrigerant circulates in the circulation loop, the condenser 105 can have a higher temperature.

[0197] In the second circulation loop, the battery heat exchange plate 302, electric heater 107, first water pump 1061, condenser 105, and second power circuit heat exchange plate 405 are sequentially connected via a coolant channel. As the coolant circulates through this circulation loop, the heat generated by the condenser 105 and second power circuit 404 is transferred to the battery heat exchange plate 302, thereby heating the battery 301.

[0198] In the third circulation loop, multi-way valve 102 connects the coolant passages between the first evaporator 103, the first power circuit heat exchange plate 402, and the radiator 501. This connects the first evaporator 103, the second water pump 1062, the radiator 501, and the first power circuit heat exchange plate 402 sequentially through the coolant passages. This allows heat exchange between the radiator 501, the first power circuit heat exchange plate 402, and the first evaporator 103 to increase the heat content of the first evaporator 103, thereby raising its temperature.

[0199] When the ambient temperature is low (such as in winter), and the heat generated by the first power circuit 401 and the second power circuit 404, as well as the heat generated by the condenser 105 in heat pump mode, cannot meet the heating needs of the battery 301, the operating mode of the energy storage device 100 is shown in Figure 8g, which is a flow path schematic diagram of another operating mode of the energy storage device 100 shown in Figure 7a. In this operating mode, the electric heater 107 is turned on, and the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the condenser 105, the second power circuit heat exchange plate 405, and the first power circuit heat exchange plate 402 are connected in sequence through the coolant pipe to form a circulation loop. The coolant circulating in the circulation loop is heated by the electric heater 107, the first power circuit 401, and the second power circuit 404, thereby heating the battery 301.

[0200] It is worth mentioning that, in the operating mode shown in FIG8g , the compressor 2 , the first evaporator 103 and the condenser 105 are all in the closed state.

[0201] When the energy storage device 100 is operating under low ambient temperature conditions, in addition to heating the battery using the electric heater 107, other possible methods can also be used. For example, in the energy storage device 100 shown in FIG7b , the compressor 2 is connected in parallel with a third bypass valve 6. Thus, when the compressor 2 is operating in a heating state, the third bypass valve 6 opens to reduce the pressure of the compressor 2, thereby utilizing the heat generated by the compressor 2 itself to heat the battery 301. Other operating modes of the energy storage device 100 of FIG7b can be referred to as shown in FIG8a to FIG8g above, and will not be described in detail here.

[0202] In an embodiment of the present application, the multi-way valve may also have more than ten valve ports, reserving valve ports for connecting to other possible pipelines, which is beneficial for improving the scalability of the energy storage device 100. For example, referring to FIG9a, FIG9a is another structural schematic diagram of the energy storage device 100 provided in an embodiment of the present application. In this energy storage device 100, the multi-way valve 102 is a twelve-way valve, which can provide twelve valve ports for connecting to the first evaporator 103, the condenser 105, or the first interface 1011.

[0203] In addition, the radiator module 5 of the energy storage device 100 shown in FIG9a includes two radiators, each of which can be connected between the two first interfaces, so that the two radiators are connected to the multi-way valve 102 through different first interfaces. For ease of distinction, the two radiators can be respectively referred to as radiator 501a and radiator 501b. The rest of the structure of the energy storage device shown in FIG9a is similar to that of the energy storage device shown in FIG7a above, and will not be further described here.

[0204] In the present application, the energy storage device 100 shown in FIG. 9a may also be adaptively modified. For example, FIG. 9b is an exemplary diagram of another structural diagram of the energy storage device 100 provided in an embodiment of the present application. Compared to the energy storage device 100 shown in FIG. 9a , the energy storage device 100 in FIG. 9b adds a third bypass valve 6 to the compressor 2 and further includes a dehumidification module 108. The specific configuration of the third bypass valve 6 and the dehumidification module 108, as well as their achievable functions, can be referred to in the above-described embodiments and will not be described in detail here.

[0205] In addition, in actual applications, the energy storage device 100 shown in Figure 9a can effectively adjust the connectivity between the coolant port of the first evaporator 103, the coolant port of the condenser 105 and different first interfaces through the multi-way valve 102 according to actual needs, so that the energy storage device 100 shown in Figure 9a can operate in the corresponding operating mode.

[0206] For example, when the ambient temperature is high (such as in high temperature and high humidity in summer), refer to Figure 10a, which is a schematic diagram of the flow path of an operating mode of the energy storage device 100 shown in Figure 9a. Figure 10a shows three circulation loops in this operating mode:

[0207] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0208] In the second circulation loop, the multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, and the first evaporator 103, thereby sequentially connecting the battery heat exchange plate 302, the electric heater 107, the third water pump 1063, the first power circuit heat exchange plate 402, the first water pump 1061, and the first evaporator 103 through the coolant passages. Since the temperature of the first evaporator 103 is relatively low at this point, the first evaporator 103 can cool the coolant circulating in this circulation loop. The coolant cooled by the first evaporator 103 can then exchange heat with the battery heat exchange plate 302 and the first power circuit heat exchange plate 402, thereby cooling the battery heat exchange plate 302 and the first power circuit heat exchange plate 402, thereby dissipating heat from the battery 301 and the first power circuit 401. This can meet the heat dissipation requirements of the first power circuit 401 under overload conditions, thereby ensuring the reliable operation of the energy storage device 100.

[0209] In the third circulation loop, multi-way valve 102 connects the coolant passages between condenser 105, second power circuit heat exchange plate 405, radiator 501b, and radiator 501a. This connects radiator 501b, radiator 501a, second water pump 1062, condenser 105, and second power circuit heat exchange plate 405 sequentially through the coolant passages. As the coolant circulates through this circulation loop, radiator 501b and radiator 501a simultaneously cool condenser 105 and second power circuit heat exchange plate 405, thereby improving the energy efficiency of energy storage device 100.

[0210] It should be noted that, in the operating mode shown in FIG. 10 a , the electric heater 107 is in an off state.

[0211] In other possible embodiments, the battery heat exchange plate 302 can also be cooled by the radiator 501a. For example, port 12 of the multi-way valve 102 can be connected to port 4, and port 1 to port 11. In this case, the battery heat exchange plate 302, the electric heater 107, and the radiator 501a are sequentially connected via the coolant pipe to form a circulation loop, allowing the coolant to circulate between the battery heat exchange plate 302 and the radiator 501a, dissipating heat from the battery heat exchange plate 302 through the radiator 501a.

[0212] In addition, when the ambient temperature is high (such as high temperature and high humidity in summer), but the first power circuit heat exchange plate 402 is operating under rated load conditions, the heat dissipation of the first power circuit heat exchange plate 402 can also be dissipated through the radiator module 5. For specific implementation, please refer to Figure 10b, which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in Figure 9a. Figure 10b shows four circulation loops in this operating mode:

[0213] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0214] In the second circulation loop, multi-way valve 102 connects the coolant passage between battery heat exchange plate 302 and first evaporator 103, thereby sequentially connecting battery heat exchange plate 302, electric heater 107, first water pump 1061, and first evaporator 103 through the coolant passage. Since the temperature of first evaporator 103 is relatively low at this point, it cools the coolant circulating in this circulation loop. The coolant, cooled by first evaporator 103, then exchanges heat with battery heat exchange plate 302, thereby cooling the battery heat exchange plate 302 and dissipating heat from battery 301.

[0215] In the third circulation loop, multi-way valve 102 connects the coolant passages between condenser 105, second power circuit heat exchange plate 405, and radiator 501b, thereby sequentially connecting radiator 501b, condenser 105, second power circuit heat exchange plate 405, and second water pump 1062 through the coolant passages. As the coolant circulates through this circulation loop, radiator 501b simultaneously cools condenser 105 and second power circuit heat exchange plate 405, thereby improving the energy efficiency of energy storage device 100.

[0216] In the fourth circulation loop, multi-way valve 102 connects the coolant passage between the first power circuit heat exchange plate 402 and the radiator 501a, thereby sequentially connecting the radiator 501a, the third water pump 1063, the first power circuit heat exchange plate 402, and the coolant passage. As the coolant circulates through this circulation loop, the radiator 501a cools the first power circuit heat exchange plate 402, thereby improving the energy efficiency of the energy storage device 100.

[0217] In addition, when the ambient temperature is more suitable (such as in spring or autumn), reference may be made to FIG10c, which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG9a. In this operating mode, the multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, the first power circuit heat exchange plate 402, the second power circuit heat exchange plate 405, the radiator 501a, and the radiator 501b, thereby connecting the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the first evaporator 103, the third water pump 1063, the first power circuit heat exchange plate 402, the second water pump 1062, the condenser 105, the second power circuit heat exchange plate 405, the radiator 501b, and the radiator 501a in sequence through the coolant passages to form a circulation loop. When the coolant circulates in the circulation loop, the radiator 501a and the radiator 501b can cool the battery heat exchange plate 302, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405, thereby achieving heat dissipation for the battery 301, the first power circuit 401 and the second power circuit 404.

[0218] It is worth mentioning that in the operating mode shown in FIG10c , the electric heater 107 is in the off state. Furthermore, since the heat dissipation requirements of the battery 301 and the power circuit 301 can be met solely by the radiator 501a and the radiator 501b when the ambient temperature is relatively suitable, the compressor 2, the first evaporator 103, and the condenser 105 are all in the off state in this operating mode.

[0219] When the ambient temperature is low (such as in winter), reference may be made to FIG10 d , which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG9 a .

[0220] During the operation of the energy storage device 100, the first power circuit 401 and the second power circuit 404 always generate a large amount of heat. In winter, under low temperature conditions, in order to ensure the charge and discharge performance of the battery 301, the battery 301 needs to be heated. Based on this, it can be considered to use the heat generated by the first power circuit 401 and the second power circuit 404 for heating the battery 301. In specific implementation, as shown in Figure 10d, the multi-way valve 102 connects the coolant passage between the battery heat exchange plate 302, the first power circuit heat exchange plate 402 and the second power circuit heat exchange plate 405, so that the battery heat exchange plate 302, the electric heater 107, the first water pump 1061, the condenser 105, the second power circuit heat exchange plate 405, the third water pump 1063 and the first power circuit heat exchange plate 402 are connected in sequence through the coolant channel to form a circulation loop. As the coolant circulates through this loop, the heat generated by the first power circuit 401 and the second power circuit 404 can be transferred to the battery heat exchange plate 302 to heat the battery 301, thereby achieving efficient heat utilization. In this operating mode, the electric heater 107 can be turned on or off as needed, which will not be described in detail here.

[0221] In the operating mode shown in Figure 10d, the compressor 2, the first evaporator 103, and the condenser 105 are all in the closed state. In actual application, as shown in Figure 10e, the first throttle valve 104 and the compressor 2 can also be set to the open state as needed. That is, the working principle of the heat pump is used to make the condenser 105 reach a higher temperature, so that the battery heat exchange plate 302 can be heated by the condenser 105. In specific implementation, Figure 10e shows four circulation loops:

[0222] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103 which are sequentially connected through the refrigerant pipeline. When the refrigerant circulates in the circulation loop, the condenser 105 can have a higher temperature.

[0223] In the second circulation loop, multi-way valve 102 connects the coolant passages between the battery heat exchange plate 302, condenser 105, second power circuit heat exchange plate 405, and first power circuit heat exchange plate 402. This connects the battery heat exchange plate 302, electric heater 107, second water pump 1062, condenser 105, and second power circuit heat exchange plate 405 sequentially through the coolant passages. As the coolant circulates through this circulation loop, heat generated by the first power circuit 401, the second power circuit 404, and the condenser 105 can all be transferred to the battery heat exchange plate 302, thereby heating the battery 301.

[0224] In the third circulation loop, the multi-way valve 102 connects the coolant passage between the first evaporator 103 and the radiator 501b, thereby connecting the first evaporator 103, the radiator 501b, and the first water pump 1061 sequentially through the coolant passage. It is understood that in heat pump mode, ambient heat can be transferred to the condenser 105 via the first evaporator 103. Therefore, the temperature of the first evaporator 103 is relatively low. To dissipate the cooling energy of the first evaporator 103, the temperature of the first evaporator 103 is increased. On the one hand, the first evaporator 103 can be heated by the electric heater 107; on the other hand, the heat of the first evaporator 103 can be increased through heat exchange between the radiator 501 and the first evaporator 103.

[0225] In the fourth circulation loop, multi-way valve 102 connects the coolant passage between the first power circuit heat exchange plate 402 and the radiator 501a, thereby sequentially connecting the first power circuit heat exchange plate 402, the radiator 501a, and the third water pump 1063 through the coolant passage. As the coolant circulates through this circulation loop, the radiator 501a cools the coolant, thereby cooling the first power circuit heat exchange plate 402 and dissipating heat from the power circuit 301.

[0226] When the energy storage system 100 operates in heat pump mode, other possible circulation loops can be formed by connecting the battery heat exchange plate 302 and the condenser 105 in series. For example, refer to Figure 10f, which shows three circulation loops:

[0227] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104 and the first evaporator 103 which are sequentially connected through the refrigerant pipeline. When the refrigerant circulates in the circulation loop, the condenser 105 can have a higher temperature.

[0228] In the second circulation loop, the battery heat exchange plate 302, electric heater 107, second water pump 1062, condenser 105, second power circuit heat exchange plate 405, third water pump 1063, and first power circuit heat exchange plate 402 are sequentially connected via a coolant channel. As the coolant circulates through this circulation loop, heat generated by the condenser 105, first power circuit heat exchange plate 402, and second power circuit heat exchange plate 405 is transferred to the battery heat exchange plate 302, thereby heating the battery 301.

[0229] In the third circulation loop, multi-way valve 102 connects the coolant passages between first evaporator 103, radiators 501a, and 501b, thereby sequentially connecting first evaporator 103, radiator 501b, radiator 501a, and first water pump 1061 through the coolant passages. This allows heat exchange between radiators 501a, 501b, and first evaporator 103 to increase the heat content of first evaporator 103, thereby raising its temperature.

[0230] When the ambient temperature is low (such as in winter), and the heat generated by the first power circuit 401, the second power circuit 404, and the heat generated by the condenser 105 in heat pump mode cannot meet the heating needs of the battery 301, the operating mode of the energy storage device 100 is shown in Figure 10g, which is a flow path schematic diagram of another operating mode of the energy storage device 100 shown in Figure 9a. In this mode, the electric heater 107 is turned on, and the battery heat exchange plate 302, the electric heater 107, the second water pump 1062, the condenser 105, the second power circuit heat exchange plate 405, and the first power circuit heat exchange plate 402 are connected in sequence through the coolant pipe to form a circulation loop. The electric heater 107, the first power circuit heat exchange plate 402, and the second power circuit heat exchange plate 405 heat the coolant circulating in the circulation loop to achieve heating of the battery 301.

[0231] It is worth mentioning that, in the operating mode shown in FIG10 g , the compressor 2 , the first evaporator 103 and the condenser 105 are all in the closed state.

[0232] When the energy storage device 100 is operating under low ambient temperature conditions, in addition to heating the battery through the electric heater 107, other possible methods can also be used. For example, in the energy storage device 100 shown in FIG9b , the compressor 2 is connected in parallel with a third bypass valve 6. Thus, when the compressor 2 is operating in a heating state, the third bypass valve 6 opens to reduce the pressure of the compressor 2, thereby utilizing the heat generated by the compressor 2 itself to heat the battery 301. Other operating modes of the energy storage device 100 of FIG9b can be referred to as shown in FIG10a to FIG10g above, and will not be described in detail here.

[0233] It can be understood that based on the energy storage device provided in the above-mentioned embodiments of the present application, in actual applications, the number of valve bodies of the multi-way valve, the number of valve ports, and the docking conditions between each valve port and the first interface can be adaptively adjusted according to actual needs, and the number and specific setting positions of water pumps and radiators can be adaptively adjusted, which should all be understood to fall within the scope of protection of the present application.

[0234] From the above introduction to the energy storage device 100 provided in the embodiment of the present application, it can be known that, depending on the different operating modes of the energy storage device 100, the battery heat exchange plate 302 can be connected to different coolant circulation loops through the multi-way valve 102, thereby achieving effective control of the temperature of the battery 301. For example, when the energy storage device 100 is operating in a high-temperature environment, the battery heat exchange plate 302 and the first evaporator 103 can be connected in series to the same coolant circulation loop through the multi-way valve 102 to dissipate heat from the battery heat exchange plate 302 through the refrigerant circulation loop. The battery heat exchange plate 302 and the radiator 501 can also be connected in series to the same coolant circulation loop through the multi-way valve 102 to dissipate heat from the battery heat exchange plate 302 through the radiator 501. In specific implementation, reference can be made to Figure 11a, which is another structural schematic diagram of the energy storage device 100 provided in the embodiment of the present application. The energy storage device 100 includes a thermal management module 1, a compressor 2, a battery module 3 and a radiator module 5. The specific configuration and connection relationship of each structure of the energy storage device 100 can refer to the above embodiment and will not be described in detail here.

[0235] In the present application, the energy storage device 100 shown in FIG. 11a may also be adaptively modified. For example, FIG. 11b may be referred to. FIG. 9b is another schematic structural diagram of the energy storage device 100 provided in an embodiment of the present application. Compared to the energy storage device 100 shown in FIG. 9a , the energy storage device 100 in FIG. 9b adds a third bypass valve 6 to the compressor 2, and the energy storage device 100 also includes a dehumidification module 108. The specific configuration of the third bypass valve 6 and the dehumidification module 108, as well as their achievable functions, can be referred to in the above embodiments and will not be described in detail here.

[0236] In addition, in actual applications, the energy storage device 100 shown in Figure 11a can effectively adjust the connectivity between the coolant port of the first evaporator 103, the coolant port of the condenser 105 and different first interfaces through the multi-way valve 102 according to actual needs, so that the energy storage device 100 shown in Figure 11a can operate in the corresponding operating mode.

[0237] For example, when the ambient temperature is high (such as in high temperature and high humidity in summer), refer to Figure 12a, which is a schematic diagram of the flow path of an operating mode of the energy storage device 100 shown in Figure 11a. Figure 12a shows three circulation loops in this operating mode:

[0238] The first circulation loop includes the compressor 2, the condenser 105, the first throttle valve 104, and the first evaporator 103, which are sequentially connected through the refrigerant pipeline. The first circulation loop is a refrigerant circulation loop. During the refrigerant circulation in the circulation loop, the first evaporator 103 can be kept at a relatively low temperature.

[0239] In the second circulation loop, the multi-way valve 102 connects the coolant passage between the battery heat exchange plate 302 and the first evaporator 103, thereby sequentially connecting the battery heat exchange plate 302, the first water pump 1061, the first evaporator 103, and the electric heater 107 through the coolant passage. Since the temperature of the first evaporator 103 is relatively low at this point, it can cool the coolant circulating in this circulation loop. The coolant cooled by the first evaporator 103 can then exchange heat with the battery heat exchange plate 302, thereby cooling the battery heat exchange plate 302 and dissipating heat from the battery 301. This can meet the heat dissipation requirements of the battery 301 under overload conditions, thereby ensuring the reliable operation of the energy storage device 100.

[0240] In the third circulation loop, multi-way valve 102 connects the coolant passage between condenser 105 and radiator 501, thereby sequentially connecting radiator 501, second water pump 1062, and condenser 105 through the coolant passage. As the coolant circulates through this circulation loop, radiator 501 cools condenser 105.

[0241] It should be noted that, in the operating mode shown in FIG. 12 a , the electric heater 107 is in an off state.

[0242] In addition, when the ambient temperature is more suitable (such as in spring or autumn), reference may be made to FIG12b, which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in FIG11a. In this operating mode, the multi-way valve 102 connects the coolant passage between the battery heat exchange plate 302 and the radiator 501, so that the battery heat exchange plate 302, the first water pump 1061, the first evaporator 103, the second water pump 1062, the radiator 501 and the electric heater 107 are connected in sequence through the coolant channel to form a circulation loop. Then, during the circulation of the coolant in this circulation loop, the radiator 501 can cool the battery heat exchange plate 302, thereby achieving heat dissipation for the battery 301.

[0243] It is worth mentioning that in the operating mode shown in Figure 12b above, the electric heater 107 is in the off state. Furthermore, since the heat dissipation requirements of the battery 301 and the power circuit 301 can be met solely by the radiator 501 when the ambient temperature is relatively suitable, in this operating mode, the compressor 2, the first evaporator 103, and the condenser 105 are all in the off state. Furthermore, when the battery 301 is overloaded, it generates a high amount of heat. Based on this, multiple fans 502 can be provided in the radiator module 5 to dissipate heat from the radiator 501, thereby improving the cooling efficiency of the radiator 501 for the cooling water, thereby meeting the heat dissipation requirements of the battery 301.

[0244] When the ambient temperature is low (such as in winter), refer to Figure 12c, which is a schematic diagram of the flow path of another operating mode of the energy storage device 100 shown in Figure 11a. In this mode, the electric heater 107 is turned on, and the battery heat exchange plate 302, the first water pump 1061, the first evaporator 103, and the electric heater 107 are connected in sequence through the coolant pipeline to form a circulation loop. The electric heater 107 heats the coolant circulating in the circulation loop to achieve heating of the battery 301.

[0245] When the energy storage device 100 is operating under low ambient temperature conditions, in addition to heating the battery through the electric heater 107, other possible methods can also be used. For example, in the energy storage device 100 shown in FIG11b, the compressor 2 is connected in parallel with a third bypass valve 6. Thus, when the compressor 2 is operating in a heating state, the third bypass valve 6 opens to reduce the pressure of the compressor 2, thereby utilizing the heat generated by the compressor 2 itself to heat the battery 301. Other operating modes of the energy storage device 100 of FIG11b can be referred to as shown in FIG12a to FIG12c above, and will not be described in detail here.

[0246] Since in some application scenarios, multiple energy storage devices 100 can be set up at the same time, these multiple energy storage devices 100 form an energy storage device group. In order to ensure the operational reliability and safety of the energy storage device group, it is necessary to perform thermal management on each energy storage device 100. Referring to Figure 13a, Figure 13a is a structural schematic diagram of the energy storage device group provided in an embodiment of the present application. The energy storage device group includes two energy storage devices 100, and the two energy storage devices 100 share a radiator module 5, and the other structures of the two energy storage devices 100 can be set with reference to Figure 11a above, and will not be described in detail here.

[0247] By having two energy storage devices 100 share a radiator module 5, the energy storage device group can effectively reduce the cost of the energy storage device group and achieve synchronous regulation of each energy storage device 100 in the energy storage device group to achieve consistency in temperature regulation of each energy storage device, thereby improving the operational reliability of the energy storage device group.

[0248] In addition, reference may be made to FIG13b, which is another schematic diagram of the structure of an energy storage device group provided in an embodiment of the present application. Unlike the energy storage device group shown in FIG13a, FIG13b adjusts the positions of the first water pump 1061, the second water pump 1062, and the electric heater 107 so that each energy storage device can share the water pump and electric heater. This reduces the number of water pumps and electric heaters while still meeting the temperature control requirements of the battery 301, thereby reducing the cost of the energy storage device group.

[0249] The energy storage device provided in the above embodiment of the present application can be applied to various energy storage scenarios, as shown in Figure 14, which is a structural diagram of the photovoltaic storage system provided in the embodiment of the present application. The photovoltaic storage system may include a power conversion device 200, a power generation device 300 and the above-mentioned energy storage device 100. Among them, the power conversion device 200 is connected between the power generation device 300 and the energy storage device 100, and the power generation device 300 is used to store the generated electric energy into the battery of the energy storage device 100 through the power conversion device 200. The photovoltaic storage system uses the energy storage device 100 provided in the above embodiment, which can effectively improve the operational safety of the photovoltaic storage system.

[0250] In addition, the energy storage device 100 provided in the embodiment of the present application can also be applied to a charging network. For example, reference may be made to Figure 15, which is a structural diagram of a charging network provided in an embodiment of the present application. The charging network includes a charging pile 400 and the above-mentioned energy storage device 100, wherein the charging pile 400 is electrically connected to the battery in the energy storage device 100 via a cable, and the battery can provide its own stored electrical energy to the charging pile 400. The charging pile 400 has a connector 4001, which can be connected to a powered device (such as a vehicle) so that energy can be replenished to the powered device. The charging network applies the energy storage device 100 provided in the above embodiment, which can effectively improve the safety of the charging network and also help to improve the flexibility of the charging network during deployment.

[0251] In a specific configuration, the charging network may include multiple charging piles 400 , and each energy storage device 100 may provide power to multiple charging piles 400 , thereby effectively improving the flexibility of deployment.

[0252] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An energy storage device, characterized in that: It includes a thermal management module, a battery module, a first power unit, a second power unit and a radiator module, wherein: The thermal management module includes a shell and a multi-way valve, a first evaporator and a condenser arranged in the shell, the shell includes a plurality of first interfaces; two coolant ports of the first evaporator are connected to the multi-way valve, and two coolant ports of the condenser are connected between the multi-way valve and one of the first interfaces; The battery module includes a battery and a battery heat exchange plate, the battery is in contact with the battery heat exchange plate, and two coolant ports of the battery heat exchange plate are respectively connected to the multi-way valve through one of the first interfaces; The first power unit includes an energy storage converter and a first power circuit heat exchange plate, the energy storage converter is in contact with the first power circuit heat exchange plate, and two coolant ports of the first power circuit heat exchange plate are respectively connected to the multi-way valve through one of the first interfaces; The second power unit comprises a DC converter and a second power circuit heat exchange plate, the DC converter is in contact with the second power circuit heat exchange plate, and two coolant ports of the second power circuit heat exchange plate are respectively connected to the multi-way valve through one of the first interfaces; The radiator module includes a radiator, and two coolant ports of the radiator are respectively connected to the multi-way valve through one of the first interfaces.

2. The energy storage device according to claim 1, characterized in that: The thermal management module also includes a first throttle valve, which is arranged in the shell; the energy storage device also includes a compressor, and the compressor, the first evaporator, the first throttle valve and the condenser are connected in sequence through a refrigerant pipeline.

3. The energy storage device according to claim 1 or 2, characterized in that: The battery heat exchange plate is connected in series or in parallel with the first power circuit heat exchange plate and is connected between two valve ports of the multi-way valve through the first interface; or The two coolant ports of the first power circuit heat exchange plate and the two coolant ports of the battery heat exchange plate are respectively connected to different valve ports of the multi-way valve through different first interfaces.

4. The energy storage device according to any one of claims 1 to 3, characterized in that: The battery heat exchange plate and the second power circuit heat exchange plate are connected in series or in parallel and connected between two valve ports of the multi-way valve through the first interface; or The two coolant ports of the second power circuit heat exchange plate and the two coolant ports of the battery heat exchange plate are respectively connected to different valve ports of the multi-way valve through different first interfaces.

5. The energy storage device according to any one of claims 1 to 4, characterized in that: The multi-way valve is connected between the first power circuit heat exchange plate and the first evaporator, and is used to connect or disconnect the coolant passage between the first power circuit heat exchange plate and the first evaporator.

6. The energy storage device according to claim 1, characterized in that: The second power circuit heat exchange plate and the condenser are connected in series or in parallel through the first interface and are connected between two valve ports of the multi-way valve.

7. The energy storage device according to claim 6, characterized in that: The first power circuit heat exchange plate and the second power circuit heat exchange plate are connected in series or in parallel through the first interface and are connected between two valve ports of the multi-way valve.

8. The energy storage device according to claim 1, characterized in that: The energy storage device further includes a first water pump, and the battery heat exchange plate is connected in series with the first water pump and connected between two valve ports of the multi-way valve through the first interface; One coolant port of the first power circuit heat exchange plate, one coolant port of the second power circuit heat exchange plate, and one coolant port of the condenser are all connected to one valve port of the multi-way valve, and another coolant port of the first power circuit heat exchange plate and another coolant port of the second power circuit heat exchange plate are both connected to another valve port of the multi-way valve; The liquid outlet of the first water pump is connected to a coolant port of the first power circuit heat exchange plate and a coolant port of the second power circuit heat exchange plate, and the liquid inlet of the first water pump is connected to another coolant port of the first power circuit heat exchange plate and another coolant port of the second power circuit heat exchange plate.

9. The energy storage device according to claim 8, characterized in that: The energy storage device also includes a first three-way valve and a second three-way valve; a coolant port of the first power circuit heat exchange plate, a coolant port of the second power circuit heat exchange plate, and a liquid outlet of the first water pump are respectively connected to the three valve ports of the first three-way valve in a one-to-one correspondence; another coolant port of the first power circuit heat exchange plate, another coolant port of the second power circuit heat exchange plate, and a liquid inlet of the first water pump are respectively connected to the three valve ports of the second three-way valve in a one-to-one correspondence.

10. The energy storage device according to any one of claims 1 to 9, characterized in that: The multi-way valve is connected between the battery heat exchange plate and the first evaporator, and is used to connect or disconnect the coolant passage between the battery heat exchange plate and the first evaporator.

11. The energy storage device according to any one of claims 1 to 10, characterized in that: The multi-way valve is connected between the battery heat exchange plate and the condenser, and the multi-way valve is used to connect or disconnect the passage between the battery heat exchange plate and the condenser.

12. The energy storage device according to any one of claims 1 to 11, characterized in that: The radiator module includes two radiators, and the two coolant ports of the two radiators are respectively connected to different valve ports of the multi-way valve through different first interfaces.

13. The energy storage device according to claim 12, characterized in that: The multi-way valve is connected between the first power circuit heat exchange plate and one of the radiators, and the multi-way valve is used to connect or disconnect the passage between the first power circuit heat exchange plate and one of the radiators.

14. The energy storage device according to claim 12 or 13, characterized in that: The multi-way valve is also connected between the condenser and the other radiator, and the multi-way valve is used to connect or disconnect the passage between the condenser and the other radiator.

15. The energy storage device according to any one of claims 1 to 14, characterized in that: The first power unit further includes a first bypass valve, which is arranged in parallel with the first power circuit heat exchange plate; or the second power unit further includes a second bypass valve, which is arranged in parallel with the second power circuit heat exchange plate.

16. A solar energy storage system, characterized in that: It comprises a power generation device, a power conversion device and an energy storage device as described in any one of claims 1 to 15, wherein the power conversion device is connected between the power generation device and the energy storage device, and the power generation device is used to store the generated electric energy into a battery of the energy storage device through the power conversion device.

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