Energy storage system for liquid cooling user

Abstract

The utility model discloses a liquid cooling household energy storage system. The system comprises a liquid cooling circulation subsystem, a PCS energy storage converter subsystem and at least one battery pack subsystem, and the liquid cooling circulation subsystem comprises a water inlet pipeline interface and a water outlet pipeline interface. The PCS energy storage converter subsystem comprises a first liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface, and each battery pack subsystem comprises a second liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface. According to the liquid cooling household energy storage system, the heat dissipation efficiency can be effectively improved, the temperature of the battery cells in the energy storage system is uniform, the service life of the energy storage system can be greatly prolonged, meanwhile, the number of the battery pack subsystems can be adjusted according to user requirements, the battery capacity is adjusted, and the flexibility is high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling energy storage, in particular to a liquid cooling household energy storage system. Background Art

[0002] Household energy storage, also known as home storage, is an important part of distributed energy resources (DER). Distributed energy supply can save transmission and distribution costs, while also improving power quality and energy efficiency. With the emergence of factors such as the widening of peak-valley price differences and the reduction of energy storage costs, more and more families are beginning to choose household energy storage, making household energy storage a new energy storage trend.

[0003] At present, the common cooling methods for household energy storage systems are natural cooling or forced air cooling. These cooling methods have low reliability and low heat dissipation efficiency, which may cause uneven temperature of the battery cells inside the energy storage system, thus affecting the service life of the energy storage system. At the same time, most of the liquid-cooled household energy storage products on sale are integrated models, the battery capacity cannot be expanded, the flexibility is poor, and the user options are low. Utility Model Content

[0004] The main purpose of the utility model is to propose a liquid-cooled household energy storage system, which aims to solve the problem that the natural cooling or forced air cooling methods in household energy storage systems have low reliability and low heat dissipation efficiency, which may cause uneven temperature of the battery cells inside the energy storage system, thereby affecting the service life of the energy storage system. At the same time, most of the liquid-cooled household energy storage products on sale are integrated models, the battery capacity cannot be expanded, the flexibility is poor, and the user has low options.

[0005] To achieve the above-mentioned purpose, the utility model provides a liquid-cooled household energy storage system, the liquid-cooled household energy storage system comprising: a liquid-cooled circulation subsystem, a PCS energy storage converter subsystem and at least one battery pack subsystem, wherein the liquid-cooled circulation subsystem comprises a water inlet pipeline interface and a water outlet pipeline interface, the PCS energy storage converter subsystem comprises a first liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface, the water inlet pipeline and the water outlet pipeline inside the PCS energy storage converter subsystem are three-way pipelines, the first end of the water inlet pipeline inside the PCS energy storage converter subsystem, the first liquid The cold plate and the first end of the water outlet pipeline are connected in sequence, the water inlet pipeline interface inside the PCS energy storage converter subsystem is connected to the second end of the internal water inlet pipeline, and the water outlet pipeline interface inside the PCS energy storage converter subsystem is connected to the second end of the internal water outlet pipeline. Each of the battery pack subsystems includes a second liquid cold plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface. The water inlet pipeline and the water outlet pipeline inside each of the battery pack subsystems are three-way pipelines. The first end of the water inlet pipeline inside each of the battery pack subsystems, the second liquid cold plate and the first end of the water outlet pipeline are connected in sequence. Each The water inlet pipe interface inside the battery pack subsystem is connected to the second end of the internal water inlet pipe, and the water outlet pipe interface inside each of the battery pack subsystems is connected to the second end of the internal water outlet pipe; the water outlet pipe interface of the liquid cooling circulation subsystem is connected to the third end of the water inlet pipe of any subsystem to be connected, and the water inlet pipe interface of the liquid cooling circulation subsystem is connected to the third end of the water outlet pipe of any subsystem to be connected, wherein the subsystem to be connected includes the PCS energy storage converter subsystem and the at least one battery pack subsystem; the remaining subsystems to be connected are connected in pairs in sequence, wherein the previous subsystem to be connected The water inlet pipe interface of the system is connected to the third end of the water inlet pipe of the subsequent subsystem to be connected, and the water outlet pipe interface of the previous subsystem to be connected is connected to the third end of the water outlet pipe of the subsequent subsystem to be connected; the third end of the water inlet pipe of the first subsystem to be connected in the remaining subsystems to be connected that are connected in sequence in pairs is connected to the water inlet pipe interface of any of the subsystems to be connected, and the third end of the water outlet pipe of the first subsystem to be connected is connected to the water outlet pipe interface of any of the subsystems to be connected, and the water inlet pipe interface and water outlet pipe interface of the last subsystem to be connected in the remaining subsystems to be connected that are connected in sequence in pairs are closed.

[0006] In one embodiment of the utility model, preferably, the liquid cooling circulation subsystem further includes a first electrical connection element, a liquid storage device, a heat exchanger, a water pump, a first internal pipeline, a second internal pipeline, a water inlet pipeline and a water outlet pipeline, wherein the first internal pipeline is a connecting pipeline between the heat exchanger and the liquid storage device, and the second internal pipeline is a connecting pipeline between the liquid storage device and the water pump; the first electrical connection element is electrically connected to the heat exchanger and the water pump, and the first electrical connection element transmits current and signals to the heat exchanger and the water pump; the liquid storage device and the water pump The liquid storage device is connected through the second internal pipeline, and is used to provide coolant to the water pump; the water pump is connected to the water outlet pipeline interface inside the liquid cooling circulation subsystem through the internal water outlet pipeline, and the water pump is used to provide coolant to the water outlet pipeline interface; the water inlet pipeline interface inside the liquid cooling circulation subsystem is connected to the heat exchanger through the internal water inlet pipeline, and the heat exchanger is used to dissipate heat and cool the coolant returned from the water inlet pipeline interface; the liquid storage device is connected to the heat exchanger through the first internal pipeline, and the liquid storage device is used to receive the coolant after being processed by the heat exchanger.

[0007] In one embodiment of the utility model, preferably, the liquid cooling circulation subsystem also includes a chassis and a base plate, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the liquid cooling circulation subsystem, and the other hole is used to insert a water outlet pipe of the liquid cooling circulation subsystem.

[0008] In one embodiment of the present invention, preferably, the chassis has a visual window.

[0009] In one embodiment of the utility model, preferably, the PCS energy storage inverter subsystem also includes a second electrical connection element and a PCS energy storage inverter, and the PCS energy storage inverter is placed on the first liquid cooling plate; the second electrical connection element is electrically connected to the PCS energy storage inverter, and the second electrical connection element transmits current and signals to the PCS energy storage inverter.

[0010] In one embodiment of the utility model, preferably, the PCS energy storage inverter subsystem also includes a chassis, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the PCS energy storage inverter subsystem, and the other hole is used to insert a water outlet pipe of the PCS energy storage inverter subsystem.

[0011] In one embodiment of the utility model, preferably, each of the battery pack subsystems further includes a third electrical connection element, a battery cell module and a DC-DC power module, and the battery cell module and the DC-DC power module are placed on the second liquid cooling plate; the third electrical connection element is electrically connected to the battery cell module and the DC-DC power module, and the third electrical connection element is used to transmit current and signals to the battery cell module and the DC-DC power module.

[0012] In one embodiment of the utility model, preferably, each of the battery pack subsystems further includes a chassis, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the battery pack subsystem, and the other hole is used to insert a water outlet pipe of the battery pack subsystem.

[0013] In one embodiment of the utility model, preferably, each of the subsystems to be connected further includes an inlet pipe solenoid valve and an outlet pipe solenoid valve; the inlet pipe solenoid valve is arranged on the second end of the water inlet pipe of the subsystem to be connected, and the inlet pipe solenoid valve is used to automatically open when receiving an opening signal, and automatically close when receiving a closing signal; the outlet pipe solenoid valve is arranged on the second end of the water outlet pipe of the subsystem to be connected, and the outlet pipe solenoid valve is used to automatically open when receiving an opening signal, and automatically close when receiving a closing signal.

[0014] The liquid-cooled household energy storage system proposed in the utility model can effectively improve the heat dissipation efficiency and make the temperature of the battery cells inside the energy storage system uniform, thereby greatly improving the service life of the energy storage system. At the same time, the number of battery pack systems can be adjusted according to user needs, thereby adjusting the battery capacity, and has strong flexibility.

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a liquid-cooled household energy storage system provided in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the structure of a water inlet pipeline and a water outlet pipeline provided in an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the structure of a liquid cooling circulation subsystem provided in an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the structure of another liquid cooling circulation subsystem provided in an embodiment of the utility model;

[0020] Figure 5 A schematic structural diagram of a PCS energy storage converter subsystem provided in an embodiment of the utility model;

[0021] Figure 6 A schematic structural diagram of another PCS energy storage converter subsystem provided in an embodiment of the utility model;

[0022] Figure 7 A schematic diagram of the structure of a battery pack subsystem provided in an embodiment of the utility model;

[0023] Figure 8 A schematic diagram of the structure of another battery pack subsystem provided in an embodiment of the utility model;

[0024] Fig. 9 A schematic diagram of the structure of a water inlet pipeline solenoid valve and a water outlet pipeline solenoid valve provided in an embodiment of the utility model;

[0025] Fig.10 A schematic structural diagram of another liquid-cooled household energy storage system provided in an embodiment of the utility model.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0028] Combine the following Figures 1 to 10 The present invention describes a liquid-cooled household energy storage system according to some embodiments of the present invention.

[0029] An embodiment of the present invention provides a liquid-cooled household energy storage system, the liquid-cooled household energy storage system comprising: a liquid-cooled circulation subsystem, a PCS energy storage converter subsystem and at least one battery pack subsystem, wherein the liquid-cooled circulation subsystem comprises a water inlet pipeline interface and a water outlet pipeline interface, the PCS energy storage converter subsystem comprises a first liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface, the water inlet pipeline and the water outlet pipeline inside the PCS energy storage converter subsystem are three-way pipelines, the first end of the water inlet pipeline inside the PCS energy storage converter subsystem, the first liquid cooling The plate and the first end of the water outlet pipeline are connected in sequence, the water inlet pipeline interface inside the PCS energy storage converter subsystem is connected to the second end of the internal water inlet pipeline, and the water outlet pipeline interface inside the PCS energy storage converter subsystem is connected to the second end of the internal water outlet pipeline. Each of the battery pack subsystems includes a second liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface. The water inlet pipeline and the water outlet pipeline inside each of the battery pack subsystems are three-way pipelines. The first end of the water inlet pipeline inside each of the battery pack subsystems, the second liquid cooling plate and the first end of the water outlet pipeline are connected in sequence. Each of the The water inlet pipe interface inside the battery pack subsystem is connected to the second end of the internal water inlet pipe, and the water outlet pipe interface inside each of the battery pack subsystems is connected to the second end of the internal water outlet pipe; the water outlet pipe interface of the liquid cooling circulation subsystem is connected to the third end of the water inlet pipe of any subsystem to be connected, and the water inlet pipe interface of the liquid cooling circulation subsystem is connected to the third end of the water outlet pipe of any subsystem to be connected, wherein the subsystem to be connected includes the PCS energy storage converter subsystem and the at least one battery pack subsystem; the remaining subsystems to be connected are connected in pairs in sequence, wherein the previous subsystem to be connected The water inlet pipe interface of the system is connected to the third end of the water inlet pipe of the subsequent subsystem to be connected, and the water outlet pipe interface of the previous subsystem to be connected is connected to the third end of the water outlet pipe of the subsequent subsystem to be connected; the third end of the water inlet pipe of the first subsystem to be connected in the remaining subsystems to be connected that are connected in sequence in pairs is connected to the water inlet pipe interface of any subsystem to be connected, and the third end of the water outlet pipe of the first subsystem to be connected is connected to the water outlet pipe interface of any subsystem to be connected, and the water inlet pipe interface and the water outlet pipe interface of the last subsystem to be connected in the remaining subsystems to be connected that are connected in sequence in pairs are closed.

[0030] In the above embodiment, the liquid-cooled household energy storage system may include a liquid-cooled circulation subsystem, a PCS energy storage converter subsystem, and one or more battery pack subsystems. The number of battery pack subsystems may be determined according to the actual demand for energy storage. The liquid-cooled circulation subsystem may include a water inlet pipeline interface and a water outlet pipeline interface, wherein the liquid-cooled circulation subsystem provides cooling liquid to the outside through an internal water outlet pipeline interface, and receives the cooling liquid flowing back from the outside through an internal water inlet pipeline interface. The PCS energy storage converter subsystem may include a first liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface, and a water outlet pipeline interface. The first liquid cooling plate may provide cooling function for the heat dissipation components inside the PCS energy storage converter subsystem, and the water inlet pipeline and the water outlet pipeline inside the PCS energy storage converter subsystem are three-way pipelines, respectively, and the three outlets of each three-way pipeline may be referred to as the first end, the second end, and the third end. Among them, inside the PCS energy storage converter subsystem, the first end of the water inlet pipeline is connected to the first liquid cooling plate, and the first liquid cooling plate is connected to the first end of the water outlet pipeline. In addition, inside the PCS energy storage converter subsystem, the second end of the water inlet pipeline can be connected to the water inlet pipeline interface, and the second end of the water outlet pipeline can be connected to the water outlet pipeline interface. For each battery pack subsystem, each battery pack subsystem may include a second liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface. The second liquid cooling plate can provide cooling function for the heat dissipation components (such as battery cell modules, etc.) inside the battery pack subsystem, and the water inlet pipeline and the water outlet pipeline inside the battery pack subsystem are three-way pipelines, respectively, and the three outlets of each three-way pipeline can be referred to as the first end, the second end and the third end. Among them, inside the battery pack subsystem, the first end of the water inlet pipeline is connected to the second liquid cooling plate, and the second liquid cooling plate is connected to the first end of the water outlet pipeline. In addition, inside the battery pack subsystem, the second end of the water inlet pipe can be connected to the water inlet pipe interface, and the second end of the water outlet pipe can be connected to the water outlet pipe interface.

[0031] In a liquid-cooled household energy storage system, the liquid-cooling circulation subsystem can be connected to any subsystem to be connected. Here, the subsystem to be connected can be a PCS energy storage converter subsystem or a battery pack subsystem. Specifically, the outlet pipe interface in the liquid-cooling circulation subsystem can be connected to the subsystem to be connected through the third end of the water inlet pipe of the subsystem to be connected, and at the same time, the water inlet pipe interface in the liquid-cooling circulation subsystem can be connected to the subsystem to be connected through the third end of the water outlet pipe of the subsystem to be connected. In this way, the liquid-cooling circulation subsystem and any subsystem to be connected can be connected, so that the liquid-cooling circulation subsystem provides cooling liquid for the liquid cooling plate of any of the above-mentioned subsystems to be connected, thereby realizing cooling and heat dissipation of any of the above-mentioned subsystems to be connected.

[0032] After the liquid cooling circulation subsystem is connected to any subsystem to be connected, the remaining subsystems that are not connected can be referred to as the remaining subsystems to be connected. For example, assuming that the PCS energy storage inverter subsystem is connected to the liquid cooling circulation subsystem, then the remaining subsystems to be connected are the remaining one or more battery pack subsystems; assuming that the battery pack subsystem is connected to the liquid cooling circulation subsystem, and the liquid-cooled household energy storage system only includes one battery pack subsystem, then the remaining subsystems to be connected are the PCS energy storage inverter subsystem; assuming that the battery pack subsystem is connected to the liquid cooling circulation subsystem, and the liquid-cooled household energy storage system includes multiple battery pack subsystems, then the remaining subsystems to be connected are the PCS energy storage inverter subsystem, and the battery pack subsystems that are not connected. In addition to connecting the liquid cooling circulation subsystem and any subsystem to be connected, the remaining subsystems to be connected must also be connected. At this time, the remaining subsystems to be connected can be connected in pairs in sequence according to the sequence requirements. For example, the remaining subsystems to be connected include three subsystems, which are respectively called subsystem 1 to subsystem 3. Then, after the remaining subsystems to be connected are connected in pairs, the connection order may include six types: 1) subsystem 1 is connected to subsystem 2, and subsystem 2 is connected to subsystem 3; 2) subsystem 1 is connected to subsystem 3, and subsystem 3 is connected to subsystem 2; 3) subsystem 2 is connected to subsystem 1, and subsystem 1 is connected to subsystem 3; 4) subsystem 2 is connected to subsystem 3, and subsystem 3 is connected to subsystem 1; 5) subsystem 3 is connected to subsystem 2, and subsystem 2 is connected to subsystem 1; 6) subsystem 3 is connected to subsystem 1, and subsystem 1 is connected to subsystem 2. When the remaining subsystems to be connected are connected in pairs, the water inlet pipeline interface of the previous subsystem to be connected is connected to the third end of the water inlet pipeline of the next subsystem to be connected, and the water outlet pipeline interface of the previous subsystem to be connected is connected to the third end of the water outlet pipeline of the next subsystem to be connected. For example, the connection order of the remaining subsystems to be connected is: subsystem 1 is connected to subsystem 2, and subsystem 2 is connected to subsystem 3. That is, the water inlet pipe interface of subsystem 1 is connected to the third end of the water inlet pipe of subsystem 2, and the water outlet pipe interface of subsystem 1 is connected to the third end of the water outlet pipe of subsystem 2; the water inlet pipe interface of subsystem 2 is connected to the third end of the water inlet pipe of subsystem 3, and the water outlet pipe interface of subsystem 2 is connected to the third end of the water outlet pipe of subsystem 3.

[0033] The remaining subsystems to be connected, which are connected in pairs, include the first subsystem to be connected and the last subsystem to be connected. For example, the connection order of the remaining subsystems to be connected is: subsystem 1 is connected to subsystem 2, and subsystem 2 is connected to subsystem 3. Then the first subsystem to be connected is subsystem 1, and the last subsystem to be connected is subsystem 3. Assuming that any subsystem to be connected connected to the liquid cooling circulation subsystem is subsystem 4, then the third end of the water inlet pipe of subsystem 1 is connected to the water inlet pipe interface of subsystem 4, the third end of the water outlet pipe of subsystem 1 is connected to the water outlet pipe interface of subsystem 4, and the water inlet pipe interface and the water outlet pipe interface of subsystem 3 are closed. Since then, each subsystem has formed a parallel connection structure. The specific connection order is: the liquid cooling circulation subsystem is connected to subsystem 4, subsystem 4 is connected to subsystem 1, subsystem 1 is connected to subsystem 2, and subsystem 2 is connected to subsystem 3. The liquid cooling circulation subsystem provides cooling liquid for the liquid cooling plate of each subsystem to achieve cooling and heat dissipation of each subsystem.

[0034] It should be noted that, in this embodiment, the water inlet pipes and the water outlet pipes in each subsystem can use ordinary pipes for transferring coolant in the prior art, the water inlet pipe interface and the water outlet pipe interface can use interfaces in the prior art that can be tightly connected to the pipes without leaking, and the liquid cooling plate can also be a liquid cooling plate that already exists in the prior art and meets the required specifications. No special requirements are made for the above-mentioned components in the embodiments of the present application.

[0035] like Figure 1As shown, it is assumed that the liquid-cooled household energy storage system includes a liquid-cooling circulation subsystem, a PCS energy storage inverter subsystem and two battery pack subsystems, wherein the connection order of these subsystems is the liquid-cooling circulation subsystem connected to the PCS energy storage inverter subsystem, the PCS energy storage inverter subsystem connected to the first battery pack subsystem, and the first battery pack subsystem connected to the second battery pack subsystem. Among them, the water outlet pipe interface 10 of the liquid cooling circulation subsystem is connected to the third end of the water inlet pipe 17 of the PCS energy storage inverter subsystem, and the water inlet pipe interface 8 of the liquid cooling circulation subsystem is connected to the third end of the water outlet pipe 18 of the PCS energy storage inverter subsystem; the first end of the water inlet pipe 17 of the PCS energy storage inverter subsystem, the first liquid cooling plate 16 and the first end of the water outlet pipe 18 of the PCS energy storage inverter subsystem are connected in sequence; the water inlet pipe interface 21 of the PCS energy storage inverter subsystem is connected to the third end of the water inlet pipe 28 of the first battery pack subsystem, and the water outlet pipe interface 22 of the PCS energy storage inverter subsystem is connected to the first The third end of the water outlet pipeline 29 of the battery pack subsystem is connected; the first end of the water inlet pipeline 28 of the first battery pack subsystem, the second liquid cooling plate 27 and the first end of the water outlet pipeline 29 of the first battery pack subsystem are connected in sequence; the water inlet pipeline interface 32 of the first battery pack subsystem is connected to the third end of the water inlet pipeline 28 of the second battery pack subsystem, and the water outlet pipeline interface 33 of the first battery pack subsystem is connected to the third end of the water outlet pipeline 29 of the second battery pack subsystem; the first end of the water inlet pipeline 28 of the second battery pack subsystem, the second liquid cooling plate 27 and the first end of the water outlet pipeline 29 of the second battery pack subsystem are connected in sequence. The water outlet pipeline interface 33 and the water inlet pipeline interface 32 of the second battery pack subsystem are sealed to prevent coolant leakage.

[0036] Take the PCS energy storage converter subsystem as an example. Figure 2 As shown, the upper part of the water inlet pipeline 17 of the PCS energy storage converter subsystem is the third end of the water inlet pipeline 17, the right part of the water inlet pipeline 17 (i.e., the part connected to the first liquid cooling plate) is the first end of the water inlet pipeline 17, and the lower part of the water inlet pipeline 17 (i.e., the part connected to the water inlet pipeline interface 21) is the second end of the water inlet pipeline 17. For each battery pack subsystem, the positions of the first end, the second end, and the third end are the same as those of the PCS energy storage converter subsystem.

[0037] The liquid-cooled household energy storage system proposed in the embodiment of the utility model can effectively improve the heat dissipation efficiency, make the temperature of the battery cells inside the energy storage system uniform, thereby greatly improving the service life of the system. At the same time, the number of battery pack subsystems can be adjusted according to user needs, thereby adjusting the battery capacity, which has strong flexibility.

[0038] In one embodiment of the utility model, preferably, the liquid cooling circulation subsystem further includes a first electrical connection element, a liquid storage device, a heat exchanger, a water pump, a first internal pipeline, a second internal pipeline, a water inlet pipeline and a water outlet pipeline, wherein the first internal pipeline is a connecting pipeline between the heat exchanger and the liquid storage device, and the second internal pipeline is a connecting pipeline between the liquid storage device and the water pump; the first electrical connection element is electrically connected to the heat exchanger and the water pump, and the first electrical connection element transmits current and signals to the heat exchanger and the water pump; the liquid storage device and the water pump The liquid storage device is connected through the second internal pipeline, and is used to provide coolant to the water pump; the water pump is connected to the water outlet pipeline interface inside the liquid cooling circulation subsystem through the internal water outlet pipeline, and the water pump is used to provide coolant to the water outlet pipeline interface; the water inlet pipeline interface inside the liquid cooling circulation subsystem is connected to the heat exchanger through the internal water inlet pipeline, and the heat exchanger is used to dissipate heat and cool the coolant returned from the water inlet pipeline interface; the liquid storage device is connected to the heat exchanger through the first internal pipeline, and the liquid storage device is used to receive the coolant after being processed by the heat exchanger.

[0039] In the above embodiment, if Figure 3 As shown, the specific structure of the liquid cooling circulation subsystem can be as follows: In addition to the water inlet pipeline interface 8 and the water outlet pipeline interface 10, the liquid cooling circulation subsystem can also include a first electrical connection element 2 ( Figure 3The first electrical connection element 2 is electrically connected to the heat exchanger 5 and the water pump 6, and the first electrical connection element 2 can transmit current and signals to the heat exchanger 5 and the water pump 6. The liquid storage device 4 is connected to the water pump 6 through the second internal pipeline 12, and the liquid storage device 4 can provide coolant for the water pump 6. The water pump 6 is connected to the outlet pipeline interface 10 inside the liquid cooling circulation subsystem through the internal outlet pipeline 9, and the water pump 6 can circulate the coolant, and specifically provide coolant for the outlet pipeline interface 10. The inlet pipeline interface 8 inside the liquid cooling circulation subsystem is connected to the heat exchanger 5 through the internal inlet pipeline 7, and the heat exchanger 5 can perform heat dissipation and cooling treatment on the coolant returned from the inlet pipeline interface 8. The liquid storage device 4 is connected to the heat exchanger 5 through the first internal pipeline 11, and the liquid storage device 4 can receive the coolant after being processed by the heat exchanger 5. The liquid cooling circulation subsystem can control the liquid cooling and circulation of the entire liquid-cooled household energy storage system. The liquid cooling circulation subsystem can be designed with multiple specifications and models. According to the number of battery pack subsystems required by the user, different models of liquid cooling circulation subsystems can be selected to meet different coolant heat exchange and coolant flow requirements. It should be noted that the structures of different liquid cooling circulation subsystems can be as described above. The first electrical connection element 2 in the embodiment of the present application can be a plug-in connector for transmitting current and signals. For example, the first electrical connection element 2 may include a PV connector for transmitting current, and a signal connector for transmitting signals. The form of the first electrical connection element 2 is not specifically required here. The embodiment of the present application dissipates heat from heating devices, battery cells, etc. in the liquid-cooled household energy storage system through continuous circulation of coolant, so that the energy storage system operates within a good temperature range, keeps the system in good working condition, and ensures the reliability and service life of the energy storage system.

[0040] In one embodiment of the utility model, preferably, the liquid cooling circulation subsystem also includes a chassis and a base plate, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the liquid cooling circulation subsystem, and the other hole is used to insert a water outlet pipe of the liquid cooling circulation subsystem.

[0041] In the above embodiment, if Figure 4 As shown, the circulating liquid cooling subsystem may also include a chassis 1 and a bottom plate 3, which are used to place the main components of the liquid cooling circulation subsystem inside, and only expose a portion of the water inlet pipe 7, a portion of the water outlet pipe 9, the water inlet pipe interface 8, and the water outlet pipe interface 10. Among them, one side of the chassis 1 may include two holes, one of which is used to insert the water inlet pipe 7, and the other is used to insert the water outlet pipe 9. It should be noted that Figure 4The disassembly diagram of the liquid cooling circulation subsystem shows that when the liquid cooling circulation subsystem is in operation, the chassis 1 and the bottom plate 3 are in contact with each other, and a rectangular space is formed after the contact. Figure 4 The first electrical connection element 2 is shown in the figure, and the first electrical connection element 2 can be arranged on one side of the chassis 1. By providing the chassis 1 and the bottom plate 3 for the liquid cooling circulation subsystem, the embodiment of the present application can protect the various components included in the liquid cooling circulation subsystem, which is conducive to extending the service life of the liquid cooling household energy storage system.

[0042] In one embodiment of the present invention, preferably, the chassis has a visual window.

[0043] In the above embodiment, the chassis 1 may further include a visual window, through which the working status of the liquid cooling circulation subsystem can be observed, which is helpful for helping the user understand the working status of the liquid cooling circulation subsystem.

[0044] In one embodiment of the utility model, preferably, the PCS energy storage inverter subsystem also includes a second electrical connection element and a PCS energy storage inverter, and the PCS energy storage inverter is placed on the first liquid cooling plate; the second electrical connection element is electrically connected to the PCS energy storage inverter, and the second electrical connection element transmits current and signals to the PCS energy storage inverter.

[0045] In the above embodiment, the PCS energy storage converter subsystem is used to control the power input and output and electrical signal parts of the entire liquid-cooled household energy storage system. Figure 5 As shown, the PCS energy storage converter subsystem may further include a second electrical connection element 14 ( Figure 5 The second electrical connection element 14 is electrically connected to the PCS energy storage inverter 15, and the second electrical connection element 14 can transmit current and signals to the PCS energy storage inverter 15. In this embodiment, the PCS energy storage inverter can be any PCS energy storage inverter suitable for household energy storage in the prior art, which is not required here. The second electrical connection element 14 in the embodiment of the present application can be a plug-in connector for transmitting current and signals. For example, the second electrical connection element 14 may include a PV connector for transmitting current, and a signal connector for transmitting signals, and the form of the second electrical connection element 14 is not specifically required here.

[0046] In one embodiment of the utility model, preferably, the PCS energy storage inverter subsystem also includes a chassis, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the PCS energy storage inverter subsystem, and the other hole is used to insert a water outlet pipe of the PCS energy storage inverter subsystem.

[0047] In the above embodiment, if Figure 6 As shown, the PCS energy storage converter subsystem may also include a chassis 13, which is used to place the main components of the PCS energy storage converter subsystem inside, and only expose most of the water inlet pipeline 17 (including most of the first end, the second end and the third end), most of the water outlet pipeline 18 (including most of the first end, the second end and the third end), the water inlet pipeline interface 21 and the water outlet pipeline interface 22. One side of the chassis 13 may include two holes, one of which is used to insert the first end of the water inlet pipeline 17, and the other is used to insert the first end of the water outlet pipeline 18. It should be noted that Figure 6 The PCS energy storage converter subsystem is disassembled. When the PCS energy storage converter subsystem is in operation, the chassis 13 and the first liquid cooling plate 16 are in contact with each other, and a rectangular space is formed after the contact. Figure 6 The second electrical connection element 14 is shown in the figure, and the second electrical connection element 14 can be arranged on one side of the chassis 13. The embodiment of the present application provides a chassis 13 for the PCS energy storage inverter subsystem, and the chassis 13 cooperates with the first liquid cooling plate 16 to protect the various components included in the PCS energy storage inverter subsystem, which is beneficial to prolonging the service life of the liquid-cooled household energy storage system. In addition, the chassis 13 can also include a visual window, through which the working status of the PCS energy storage inverter subsystem can be observed, which is beneficial to help users understand the working status of the PCS energy storage inverter subsystem.

[0048] In one embodiment of the utility model, preferably, each of the battery pack subsystems further includes a third electrical connection element, a battery cell module and a DC-DC power module, and the battery cell module and the DC-DC power module are placed on the second liquid cooling plate; the third electrical connection element is electrically connected to the battery cell module and the DC-DC power module, and the third electrical connection element is used to transmit current and signals to the battery cell module and the DC-DC power module.

[0049] In the above embodiment, the battery pack subsystem can be used to store electrical energy and output electrical energy when needed, and can be expanded according to the actual needs of the user, with a quantity of 1 to N. Figure 7 As shown, each battery pack subsystem also includes a third electrical connection element 24 ( Figure 7), a battery cell module 25 and a DC-DC power module 26, the battery cell module 25 and the DC-DC power module 26 are placed on the second liquid cooling plate 27. The third electrical connection element 24 is electrically connected to the battery cell module 25 and the DC-DC power module 26, and the third electrical connection element 24 can transmit current and signals for the battery cell module 25 and the DC-DC power module 26. Here, the battery cell module can be any battery cell module suitable for household energy storage in the prior art, and the DC-DC power module can be any DC-DC power module suitable for household energy storage in the prior art, which is not required here. The third electrical connection element 24 in the embodiment of the present application can be a plug-in connector for transmitting current and signals. For example, the third electrical connection element 24 may include a PV connector for transmitting current, and a signal connector for transmitting signals, and the form of the third electrical connection element 24 is not specifically required here.

[0050] In one embodiment of the utility model, preferably, each of the battery pack subsystems further includes a chassis, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the battery pack subsystem, and the other hole is used to insert a water outlet pipe of the battery pack subsystem.

[0051] In the above embodiment, if Figure 8 As shown, the battery pack subsystem may further include a chassis 23, which is used to place the main components of the battery pack subsystem inside, and only expose most of the water inlet pipe 28 (including most of the first end, the second end and the third end), most of the water outlet pipe 29 (including most of the first end, the second end and the third end), the water inlet pipe interface 32 and the water outlet pipe interface 33. One side of the chassis 23 may include two holes, one of which is used to insert the first end of the water inlet pipe 28, and the other is used to insert the first end of the water outlet pipe 29. It should be noted that Figure 8 The disassembly diagram of the battery pack subsystem shows that when the battery pack subsystem is in operation, the chassis 23 and the second liquid cooling plate 27 are in contact with each other, and a rectangular space is formed after the contact. Figure 8 The third electrical connection element 24 is shown in the figure, and the third electrical connection element 24 can be set on one side of the chassis 23. The embodiment of the present application provides a chassis 23 for the battery pack subsystem, and uses the chassis 23 and the second liquid cooling plate 27 to protect the various components included in the battery pack subsystem, which is beneficial to prolonging the service life of the liquid-cooled household energy storage system. In addition, the chassis 23 can also include a visual window, through which the working status of the battery pack subsystem can be observed, which is beneficial to help users understand the working status of the battery pack subsystem.

[0052] In one embodiment of the utility model, preferably, each of the subsystems to be connected further includes an inlet pipe solenoid valve and an outlet pipe solenoid valve; the inlet pipe solenoid valve is arranged on the second end of the water inlet pipe of the subsystem to be connected, and the inlet pipe solenoid valve is used to automatically open when receiving an opening signal, and automatically close when receiving a closing signal; the outlet pipe solenoid valve is arranged on the second end of the water outlet pipe of the subsystem to be connected, and the outlet pipe solenoid valve is used to automatically open when receiving an opening signal, and automatically close when receiving a closing signal.

[0053] In the above embodiment, the PCS energy storage converter subsystem and the battery pack subsystem may also include an inlet pipe solenoid valve and an outlet pipe solenoid valve. Among them, the inlet pipe solenoid valve may be arranged on the second end of the inlet pipe of the corresponding subsystem to be connected, and the outlet pipe solenoid valve may be arranged on the second end of the outlet pipe of the corresponding subsystem to be connected. Both the inlet pipe solenoid valve and the outlet pipe solenoid valve can be automatically opened when receiving an opening signal, and automatically closed when receiving a closing signal. In the embodiment of the present application, an inlet pipe solenoid valve is arranged on the inlet pipe of the PCS energy storage converter subsystem and the inlet pipe of each battery pack subsystem, and an outlet pipe solenoid valve is arranged on the outlet pipe of the PCS energy storage converter subsystem and the outlet pipe of each battery pack subsystem. After the pipe interfaces and interfaces of adjacent subsystems are connected, the inlet pipe solenoid valve and the outlet pipe solenoid valve can be automatically opened and closed by the received signal, which facilitates the expansion of the battery pack subsystem.

[0054] In this embodiment, for every two subsystems to be connected that are connected in sequence, the water inlet pipe interface of the previous subsystem to be connected can be provided with a male head of an interface connector, and the water inlet pipe of the next subsystem to be connected can be provided with a female head of an interface connector; or the water inlet pipe interface of the previous subsystem to be connected can be provided with a female head of an interface connector, and the water inlet pipe of the next subsystem to be connected can be provided with a male head of an interface connector. In this way, after the two male and female heads of the interface connector are plugged in, the mechanical connection can trigger a switch opening signal (i.e., the above-mentioned opening signal), and the water inlet pipe solenoid valve of the previous subsystem to be connected can be opened under the control of the switch opening signal. When the interface connector is released, a switch closing signal (i.e., the above-mentioned closing signal) can be triggered, and the water inlet pipe solenoid valve of the previous subsystem to be connected can be closed under the control of the switch closing signal. The working principle of the water outlet pipe solenoid valve is the same as that of the water inlet pipe solenoid valve.

[0055] like Fig. 9 As shown, taking the PCS energy storage converter subsystem as an example, the installation positions of the water inlet pipeline solenoid valve and the water outlet pipeline solenoid valve are introduced. Fig. 9The water inlet line solenoid valve 19 is installed at the second end of the water inlet line 17, and the water outlet line solenoid valve 20 is installed at the second end of the water outlet line 18. Figure 1 As shown, when the water inlet pipeline interface 21 of the PCS energy storage converter subsystem is connected to the water inlet pipeline 28 of the battery pack subsystem, the two male and female heads of the interface connector are plugged in, and the mechanical connection can trigger a switch opening signal. At this time, the water inlet pipeline solenoid valve of the PCS energy storage converter subsystem is opened, and the circulation of the coolant can be realized. Therefore, after the coolant flows out from the water outlet pipeline interface 10 of the liquid cooling circulation subsystem, it can flow into the second liquid cooling plate 27 through the water inlet pipeline 17 of the PCS energy storage converter subsystem, the water inlet pipeline solenoid valve 19, the water inlet pipeline interface 21, and the water inlet pipeline 28 of the battery pack subsystem. The last subsystem to be connected in pairs of subsystems to be connected will not trigger the generation of a switch opening signal because its corresponding water inlet pipeline interface has no water inlet pipeline plugged in with it. Therefore, the water inlet pipeline solenoid valve of the last subsystem to be connected does not receive the opening control instruction, and the water inlet pipeline solenoid valve remains in a closed state, thereby achieving the effect of automatically closing the second end of the water inlet pipeline of the last subsystem to be connected. Similarly, the working principle of the outlet pipeline electromagnetic valve is the same as that of the inlet pipeline electromagnetic valve, which will not be repeated here. This embodiment can make the on-off connection of the pipeline simpler and more convenient by setting the inlet pipeline electromagnetic valve and the outlet pipeline electromagnetic valve, without manual operation.

[0056] In one embodiment of the present invention, preferably, Fig.10 As shown, an overall appearance diagram of a liquid-cooled household energy storage system is given, wherein the first electrical connection element 2, the second electrical connection element 14 and the two third electrical connection elements 24 can be connected in sequence, and the various pipelines can be connected in sequence, so that the liquid-cooled household energy storage system has a liquid cooling pipeline part on one side and a current and electrical signal part on the other side, which is convenient for maintenance and arrangement.

[0057] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid-cooled household energy storage system, characterized in that: The liquid-cooled household energy storage system comprises: A liquid cooling circulation subsystem, a PCS energy storage converter subsystem and at least one battery pack subsystem, wherein the liquid cooling circulation subsystem includes a water inlet pipeline interface and a water outlet pipeline interface, the PCS energy storage converter subsystem includes a first liquid cooling plate, a water inlet pipeline, a water outlet pipeline, a water inlet pipeline interface and a water outlet pipeline interface, the water inlet pipeline and the water outlet pipeline inside the PCS energy storage converter subsystem are three-way pipelines, the first end of the water inlet pipeline inside the PCS energy storage converter subsystem, the first liquid cooling plate and the first end of the water outlet pipeline are connected in sequence, and the water inlet pipeline interface inside the PCS energy storage converter subsystem is connected to the second end of the internal water inlet pipeline , the outlet pipe interface inside the PCS energy storage converter subsystem is connected to the second end of the internal outlet pipe, each of the battery pack subsystems includes a second liquid cooling plate, an inlet pipe, an outlet pipe, an inlet pipe interface and an outlet pipe interface, the inlet pipe and outlet pipe inside each of the battery pack subsystems are three-way pipes, the first end of the inlet pipe, the second liquid cooling plate and the first end of the outlet pipe inside each of the battery pack subsystems are connected in sequence, the inlet pipe interface inside each of the battery pack subsystems is connected to the second end of the internal inlet pipe, and the outlet pipe interface inside each of the battery pack subsystems is connected to the second end of the internal outlet pipe; The outlet pipe interface of the liquid cooling circulation subsystem is connected to the third end of the water inlet pipe of any subsystem to be connected, and the water inlet pipe interface of the liquid cooling circulation subsystem is connected to the third end of the water outlet pipe of any subsystem to be connected, wherein the subsystem to be connected includes the PCS energy storage converter subsystem and the at least one battery pack subsystem; The remaining subsystems to be connected are connected in pairs in sequence, wherein the water inlet pipe interface of the previous subsystem to be connected is connected to the third end of the water inlet pipe of the next subsystem to be connected, and the water outlet pipe interface of the previous subsystem to be connected is connected to the third end of the water outlet pipe of the next subsystem to be connected; The third end of the water inlet pipe of the first subsystem to be connected among the remaining subsystems to be connected in sequence of two is connected to the water inlet pipe interface of any of the subsystems to be connected, the third end of the water outlet pipe of the first subsystem to be connected is connected to the water outlet pipe interface of any of the subsystems to be connected, and the water inlet pipe interface and water outlet pipe interface of the last subsystem to be connected among the remaining subsystems to be connected in sequence of two are closed.

2. The system according to claim 1, characterized in that The liquid cooling circulation subsystem further includes a first electrical connection element, a liquid storage device, a heat exchanger, a water pump, a first internal pipeline, a second internal pipeline, a water inlet pipeline and a water outlet pipeline, wherein the first internal pipeline is a connecting pipeline between the heat exchanger and the liquid storage device, and the second internal pipeline is a connecting pipeline between the liquid storage device and the water pump; The first electrical connection element is electrically connected to the heat exchanger and the water pump, and the first electrical connection element transmits current and signals to the heat exchanger and the water pump; The liquid storage device is connected to the water pump via the second internal pipeline, and the liquid storage device is used to provide cooling liquid for the water pump; The water pump is connected to the water outlet pipeline interface inside the liquid cooling circulation subsystem through the internal water outlet pipeline, and the water pump is used to provide cooling liquid to the water outlet pipeline interface; The water inlet pipeline interface inside the liquid cooling circulation subsystem is connected to the heat exchanger through an internal water inlet pipeline, and the heat exchanger is used to perform heat dissipation and cooling processing on the coolant returned from the water inlet pipeline interface; The liquid storage device is connected to the heat exchanger through the first internal pipeline, and the liquid storage device is used to receive the coolant after being processed by the heat exchanger.

3. The system according to claim 2, characterized in that The liquid cooling circulation subsystem also includes a chassis and a base plate. One side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the liquid cooling circulation subsystem, and the other hole is used to insert a water outlet pipe of the liquid cooling circulation subsystem.

4. The system according to claim 3, characterized in that The chassis is provided with a viewing window.

5. The system according to claim 1, characterized in that The PCS energy storage converter subsystem further includes a second electrical connection element and a PCS energy storage converter, and the PCS energy storage converter is placed on the first liquid cooling plate; The second electrical connection element is electrically connected to the PCS energy storage converter, and the second electrical connection element transmits current and signals to the PCS energy storage converter.

6. The system according to claim 5, characterized in that The PCS energy storage converter subsystem also includes a chassis, and one side of the chassis includes two holes, wherein one hole is used to insert a water inlet pipe of the PCS energy storage converter subsystem, and the other hole is used to insert a water outlet pipe of the PCS energy storage converter subsystem.

7. The system according to claim 1, characterized in that Each of the battery pack subsystems further includes a third electrical connection element, a battery cell module and a DC-DC power module, and the battery cell module and the DC-DC power module are placed on the second liquid cooling plate; The third electrical connection element is electrically connected to the battery cell module and the DC-DC power module, and the third electrical connection element is used to transmit current and signals to the battery cell module and the DC-DC power module.

8. The system according to claim 7, characterized in that Each of the battery pack subsystems further includes a chassis, one side of which includes two holes, wherein one hole is used to insert a water inlet pipe of the battery pack subsystem, and the other hole is used to insert a water outlet pipe of the battery pack subsystem.

9. The system according to any one of claims 1 to 8, characterized in that Each of the subsystems to be connected further comprises a water inlet pipeline solenoid valve and a water outlet pipeline solenoid valve; The water inlet pipeline solenoid valve is arranged on the second end of the water inlet pipeline corresponding to the subsystem to be connected, and the water inlet pipeline solenoid valve is used to automatically open when receiving an opening signal, and automatically close when receiving a closing signal; The water outlet pipeline solenoid valve is arranged on the second end of the water outlet pipeline corresponding to the subsystem to be connected, and the water outlet pipeline solenoid valve is used to automatically open when receiving an opening signal, and automatically close when receiving a closing signal.

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