High-voltage liquid-cooled household energy storage battery system

Abstract

According to the high-pressure liquid-cooled household energy storage battery system, a liquid cooling mechanism is electrically connected with a liquid cooling management module, and the liquid cooling management module is used for controlling the liquid cooling mechanism to perform cooling liquid heating or cooling liquid cooling; the battery control module is electrically connected with the liquid cooling management module, the battery control module is electrically connected with the battery module, and the battery control module is used for monitoring the temperature of the battery module; the liquid cooling management module receives a temperature monitoring signal of the battery module through the battery control module so as to adjust the temperature of the battery module; the battery module is fixed in the cabinet through the liquid cooling bearing plate; an inlet of a cooling liquid inlet header pipe is connected with a cooling liquid outlet of the liquid cooling mechanism, and the cooling liquid inlet header pipe is connected with a cooling liquid input interface of the liquid cooling bearing plate through a cooling liquid inlet branch pipe; a cooling liquid output interface of the liquid cooling bearing plate is connected with a cooling liquid outlet header pipe through a cooling liquid outlet branch pipe, and the cooling liquid outlet header pipe is connected with a cooling liquid inlet of the liquid cooling mechanism. The utility model has the advantages of high safety and long service life.

Description

Technical Field

[0001] The utility model relates to a high-voltage liquid-cooled household energy storage battery system, belonging to the technical field of energy storage batteries. Background Technique

[0002] At present, in recent years, with the popularization of rooftop photovoltaic power generation systems, their highly correlated household energy storage systems have also been widely installed and used. Household energy storage systems generally have the following advantages: Emission reduction: The household energy storage system can store excess photovoltaic electric energy in the battery for standby, thus reducing the demand for the power grid. This is conducive to reducing the use of traditional fossil energy, thereby effectively reducing carbon emissions; Energy independence: The household energy storage system can enable the household to be partially or completely self-sufficient in electricity consumption and no longer rely entirely on the power grid for power supply, thus increasing the energy independence of the household; Electricity bill reduction: By using the electric energy stored in the battery during peak hours, the household can maximize the savings on electricity bills; Emergency backup: When the power grid is powered off, the household energy storage system can provide uninterrupted power supply for the household to meet the household's power demand.

[0003] However, at the present stage, during the use of household energy storage systems, the following disadvantages and deficiencies are also faced:

[0004] First, safety issues: Safety issues of household energy storage systems have been emerging in an endless stream. Especially when the household energy storage system is placed indoors, or in the basement, or in the garage, once the energy storage system undergoes thermal runaway, such as catching fire or exploding, it will cause great property losses to consumers and even endanger the lives of consumers.

[0005] Second, service life: Although manufacturers claim that their household energy storage systems have a service life of thousands of times, this service life is usually the data obtained under a test environment of 20 - 25 degrees. The actual operating temperature of the household energy storage system will deviate greatly from this temperature range. In high-latitude regions, the lowest winter temperature can be as low as -20 degrees or even lower; in low-latitude regions, the highest summer temperature can be as high as 45 degrees or even higher, which will significantly shorten the service life of household energy storage products. Content of the Utility Model

[0006] Therefore, the utility model provides a high-voltage liquid-cooled household energy storage battery system to solve the problems of poor safety and short service life existing in the use of household energy storage systems.

[0007] To achieve the above object, the utility model provides the following technical solution: A high-voltage liquid-cooled household energy storage battery system, including a cabinet, and a liquid cooling mechanism, a liquid cooling management module, a battery control module, a battery module, a liquid cooling support plate, a coolant inlet main pipe, a coolant inlet branch pipe, a coolant outlet main pipe, and a coolant outlet branch pipe are arranged inside the cabinet;

[0008] The liquid cooling mechanism and the liquid cooling management module are electrically connected, and the liquid cooling management module is used to control the liquid cooling mechanism to heat or cool the coolant.

[0009] The battery control module and the liquid cooling management module are electrically connected, the battery control module and the battery module are electrically connected, and the battery control module is used to monitor the temperature of the battery module; the liquid cooling management module receives the temperature monitoring signal of the battery module through the battery control module to adjust the temperature of the battery module.

[0010] The battery module is fixed inside the cabinet through the liquid cooling support plate; the inlet of the coolant inlet main pipe is connected to the coolant outlet of the liquid cooling mechanism, and the coolant inlet main pipe is connected to the coolant input interface of the liquid cooling support plate through the coolant inlet branch pipe; the coolant output interface of the liquid cooling support plate is connected to the coolant outlet main pipe through the coolant outlet branch pipe, and the coolant outlet main pipe is connected to the coolant inlet of the liquid cooling mechanism.

[0011] As a preferred solution of the high-voltage liquid-cooled household energy storage battery system, a base is provided at the bottom of the cabinet, and a fixing plate is connected to the side of the base; a cabinet door is provided at the front of the cabinet, and a handle is connected to the cabinet door.

[0012] As a preferred solution of the high-voltage liquid-cooled household energy storage battery system, a main power switch, a main charge and discharge interface, and a communication interface are provided on the side of the cabinet; a connector protection cover plate is connected to the outside of the main power switch, the main charge and discharge interface, and the communication interface.

[0013] As a preferred solution of the high-voltage liquid-cooled household energy storage battery system, the liquid cooling mechanism heats the coolant through a PTC heater; the liquid cooling mechanism cools the coolant through a fan and a circulation pump.

[0014] As a preferred solution of the high-voltage liquid-cooled household energy storage battery system, the battery module includes an upper cover body, an upper cover gasket, a side cover body, a side cover gasket, and battery cores.

[0015] The upper cover body is fixedly connected between the upper cover gasket and the liquid cooling support plate, and the side cover body is fixedly connected to the upper cover body through the side cover gasket; the battery cores are fixed in the accommodation space formed by the upper cover body, the side cover body, and the liquid cooling support plate.

[0016] As a preferred solution of the high-voltage liquid-cooled household energy storage battery system, a charge and discharge positive electrode interface, a charge and discharge negative electrode interface, and a voltage detection connector are provided on the side cover body.

[0017] As a preferred solution for a high-voltage liquid-cooled household energy storage battery system, the battery core includes a number of single cells, and an insulating epoxy board is provided between the single cells; the single cells are connected in series and parallel through connecting pieces; the outside between the single cells is fixed by a plastic-steel belt for the battery pack.

[0018] As a preferred solution for a high-voltage liquid-cooled household energy storage battery system, an aluminum end plate is provided at the end of the battery core, and an insulating bakelite board is used to isolate between the aluminum end plate and the connecting piece; the aluminum end plate is connected to the module fixing strip on the liquid-cooled supporting plate through a battery fixing screw.

[0019] The utility model has the following advantages: A liquid-cooling mechanism, a liquid-cooling management module, a battery control module, a battery module, a liquid-cooled supporting plate, a coolant inlet main pipe, a coolant inlet branch pipe, a coolant outlet main pipe, and a coolant outlet branch pipe are provided inside the cabinet; the liquid-cooling mechanism and the liquid-cooling management module are electrically connected, and the liquid-cooling management module is used to control the liquid-cooling mechanism to heat or cool the coolant; the battery control module and the liquid-cooling management module are electrically connected, the battery control module and the battery module are electrically connected, and the battery control module is used to monitor the temperature of the battery module; the liquid-cooling management module receives the temperature monitoring signal of the battery module through the battery control module to adjust the temperature of the battery module; the battery module is fixed inside the cabinet through the liquid-cooled supporting plate; the inlet of the coolant inlet main pipe is connected to the coolant outlet of the liquid-cooling mechanism, and the coolant inlet main pipe is connected to the coolant input interface of the liquid-cooled supporting plate through the coolant inlet branch pipe; the coolant output interface of the liquid-cooled supporting plate is connected to the coolant outlet main pipe through the coolant outlet branch pipe, and the coolant outlet main pipe is connected to the coolant inlet of the liquid-cooling mechanism. The utility model can perform efficient thermal management on all the battery cells in the energy storage system, thereby effectively avoiding the occurrence of thermal runaway of the battery cells; at the same time, it can make the battery cells in the energy storage system work in an ideal temperature range, thereby effectively extending the service life of the energy storage product; it can make the battery cell temperature get rid of the adverse effects of low ambient temperature or high ambient temperature, ensuring that the service life of the energy storage system will not be reduced; installing the energy storage system outdoors will greatly improve its safety property; compared with the installation of the energy storage system indoors, or in the basement, or in the garage, the energy storage system installed outdoors can significantly reduce the property loss or personal injury caused to consumers even if thermal runaway occurs. Description of the Drawings

[0020] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a high-voltage liquid-cooled household energy storage battery system provided in an embodiment of the present utility model;

[0023] Figure 2 It is another perspective three-dimensional schematic diagram of a high-voltage liquid-cooled household energy storage battery system provided in an embodiment of the present utility model;

[0024] Figure 3 It is an internal structural schematic diagram of a single battery module of a high-voltage liquid-cooled household energy storage battery system provided in an embodiment of the present utility model;

[0025] Figure 4 It is a schematic diagram of the cooling part of a high-voltage liquid-cooled household energy storage battery system provided in an embodiment of the present utility model;

[0026] Figure 5 It is a schematic diagram of the circuit connection of a high-voltage liquid-cooled household energy storage battery system provided in an embodiment of the present utility model.

[0027] In the figure, 1. Cabinet; 2. Liquid cooling mechanism; 3. Liquid cooling management module; 4. Battery control module; 5. Battery module; 6. Liquid cooling support plate; 7. Total coolant inlet pipe; 8. Coolant inlet branch pipe; 9. Total coolant outlet pipe; 10. Coolant outlet branch pipe; 11. Coolant input interface; 12. Coolant output interface; 13. Base; 14. Fixed plate; 15. Cabinet door; 16. Handle; 17. Main power switch; 18. Total charge and discharge interface; 19. Communication interface; 20. PTC heater; 21. Fan; 22. Circulation pump; 23. Upper cover body; 24. Upper cover gasket; 25. Side cover body; 26. Side cover gasket; 27. Battery core; 28. Charge and discharge positive interface; 29. Charge and discharge negative interface; 30. Voltage detection connector; 31. Single cell; 32. Connecting piece; 33. Insulating epoxy board; 34. Battery pack plastic steel belt; 35. Aluminum end plate; 36. Insulating electrical board; 37. Battery fixing screw; 38. Module fixing strip. Specific implementation manners

[0028] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , an embodiment of the present utility model provides a high-voltage liquid-cooled household energy storage battery system, including a cabinet 1. Inside the cabinet 1, there are a liquid-cooling mechanism 2, a liquid-cooling management module 3, a battery control module 4, a battery module 5, a liquid-cooling support plate 6, a coolant inlet main pipe 7, a coolant inlet branch pipe 8, a coolant outlet main pipe 9, and a coolant outlet branch pipe 10;

[0030] Among them, the liquid-cooling mechanism 2 and the liquid-cooling management module 3 are electrically connected, and the liquid-cooling management module 3 is used to control the liquid-cooling mechanism 2 to heat or cool the coolant;

[0031] Among them, the battery control module 4 and the liquid-cooling management module 3 are electrically connected, the battery control module 4 and the battery module 5 are electrically connected, and the battery control module 4 is used to monitor the temperature of the battery module 5; the liquid-cooling management module 3 receives the temperature monitoring signal of the battery module 5 through the battery control module 4 to adjust the temperature of the battery module 5;

[0032] Among them, the battery module 5 is fixed inside the cabinet 1 through the liquid-cooling support plate 6; the inlet of the coolant inlet main pipe 7 is connected to the coolant outlet of the liquid-cooling mechanism 2, and the coolant inlet main pipe 7 is connected to the coolant input interface 11 of the liquid-cooling support plate 6 through the coolant inlet branch pipe 8; the coolant output interface 12 of the liquid-cooling support plate 6 is connected to the coolant outlet main pipe 9 through the coolant outlet branch pipe 10, and the coolant outlet main pipe 9 is connected to the coolant inlet of the liquid-cooling mechanism 2.

[0033] In this embodiment, in a low-temperature environment, the liquid-cooling mechanism 2 heats the coolant through the PTC heater 20; the liquid-cooling management module 3 will turn on the PTC heater 20 of the liquid-cooling mechanism 2 to heat the coolant. The heated coolant will pass through the coolant inlet main pipe 7, coolant inlet branch pipe 8, coolant outlet main pipe 9, and coolant outlet branch pipe 10 arranged in the energy storage system, flow through the liquid-cooling support plate 6 in close contact with the bottom of the battery module 5, and transfer heat to the battery module 5 by means of heat exchange to heat the battery module 5. Thus, it is avoided that the battery module 5 charges or discharges at low temperature, which will significantly help to extend the service life of the energy storage product.

[0034] In this embodiment, in a high-temperature environment, the liquid cooling management module 3 activates the fan 21 and the circulation pump 22 of the liquid cooling mechanism 2 to cool down the coolant. The cooled coolant will pass through the coolant inlet main pipe 7, the coolant inlet branch pipe 8, the coolant outlet main pipe 9, and the coolant outlet branch pipe 10 arranged in the energy storage system, and flow through the liquid cooling support plate 6 in close contact with the bottom of the battery module 5. By means of heat exchange, the heat of the battery module 5 is taken away to cool down the battery module 5. This can avoid charging or discharging the battery module 5 at high temperatures, which will significantly help to extend the service life of the energy storage product.

[0035] In this embodiment, a base 13 is provided at the bottom of the cabinet 1, and a fixing plate 14 is connected to the side of the base 13; a cabinet door 15 is provided at the front of the cabinet 1, and a handle 16 is connected to the cabinet door 15; a main power switch 17, a main charge and discharge interface 18, and a communication interface 19 are provided on the side of the cabinet 1; a joint protection cover plate is connected to the outside of the main power switch 17, the main charge and discharge interface 18, and the communication interface 19.

[0036] Specifically, in the entire high-voltage liquid-cooled household energy storage battery system, the liquid cooling mechanism 2 is installed on the top of the cabinet 1 with 4 pcs of screws, and the bottom of the cabinet 1 is locked and fixed to the base 13 from the inside with 4 pcs of screws. A total of 4 pcs of screws are used on both sides of the base 13 to fix it to the fixing plate 14 to prevent the cabinet 1 from shifting. The main power switch 17, the main charge and discharge interface 18, and the communication interface 19 are installed on the right side for basic external connection. At the same time, a joint protection cover plate is installed to provide a certain degree of protection for the joints. There is a waterproof rubber strip between the cabinet door 15 and the cabinet 1 for waterproof isolation.

[0037] In this embodiment, the battery module 5 includes an upper cover body 23, an upper cover gasket 24, a side cover body 25, a side cover gasket 26, and battery cores 27; the upper cover body 23 is fixedly connected between the upper cover gasket 24 and the liquid cooling support plate 6, and the side cover body 25 is fixedly connected to the upper cover body 23 through the side cover gasket 26; the battery cores 27 are fixed in the accommodation space formed by the upper cover body 23, the side cover body 25, and the liquid cooling support plate 6; the side cover body 25 is provided with a charge and discharge positive electrode interface 28, a charge and discharge negative electrode interface 29, and a voltage detection connector 30; the battery cores 27 include a number of single cells 31, and an insulating epoxy board 33 is provided between the single cells 31; the single cells 31 are connected in series and parallel through connecting pieces 32; the outside between the single cells 31 is fixed by a battery pack plastic steel belt 34; an aluminum end plate 35 is provided at the end of the battery cores 27, and an insulating bakelite board 36 is used to isolate between the aluminum end plate 35 and the connecting piece 32; the aluminum end plate 35 is connected to the module fixing strip 38 on the liquid cooling support plate 6 through a battery fixing screw 37.

[0038] Specifically, a single battery module 5 is respectively composed of multiple battery cores 27. An insulating epoxy board 33 is attached between each single cell 31 for isolation. Then, the battery cores 27 are connected in series and parallel with each other by connecting pieces 32. Meanwhile, aluminum end plates 35 are clamped at the head and tail ends of the battery cores 27, and then fixed with an internal battery pack plastic steel belt 34. An insulating bakelite board 36 is placed between the aluminum end plates 35 and the connecting pieces 32 for isolation. Then, the internal battery modules 5 are respectively locked and fixed to the internal module fixing strips 38 in the liquid-cooling support plate 6 by using 8 pcs of internal battery fixing screws 37. The upper cover gasket 24 is pasted under the upper cover body 23 of the battery module 5. Meanwhile, 2 battery module 5 handles are locked to the upper cover body 23 of the battery module 5 for fixation. Then, the battery module 5 is placed on the liquid-cooling support plate 6, and 21 pcs of fixing screws are locked. Then, the side cover body 25 of the battery module 5 is assembled. The voltage detection connector 30, the charge and discharge positive interface 28, and the charge and discharge negative interface 29 are locked to the side cover body 25 of the battery module 5 with screws. The side cover gasket 26 is attached to the side cover body 25 of the battery module 5. Then, the wires are connected to the charge and discharge positive interface 28, the charge and discharge negative interface 29, and the voltage detection connector 30 through a wire harness. Finally, the side cover body 25 of the battery module 5 is locked to the upper cover body 23 of the battery module 5 with screws to complete the assembly of a single battery module 5.

[0039] Next, after opening the handle 16, open the cabinet door 15. Place the five-layer liquid-cooling support plate 6 in the cabinet 1 in sequence. Then, place the five battery modules 5 on the liquid-cooling support, placing them in sequence from bottom to top, and lock them together with 2 pcs of screws for fixation. Meanwhile, place the battery control module 4 and the liquid-cooling management module 3 on the liquid-cooling support plate 6 and also fix them with screws. Then, install the coolant inlet main pipe 7, the coolant inlet branch pipe 8, the coolant outlet main pipe 9, and the coolant outlet branch pipe 10 on both sides inside the cabinet 1, and lock them together with 4 pcs of clamps to the liquid-cooling pipe installation buckle for fixation. Then, insert the coolant inlet branch pipe 8 and the coolant outlet branch pipe 10 into each single battery module 5 on each layer to control the temperature condition of each single battery module 5 on each layer, and a high-voltage liquid-cooling household energy storage battery system is completed.

[0040] In summary, the interior of the cabinet 1 of the present utility model is provided with a liquid cooling mechanism 2, a liquid cooling management module 3, a battery control module 4, a battery module 5, a liquid cooling support plate 6, a coolant inlet main pipe 7, a coolant inlet branch pipe 8, a coolant outlet main pipe 9 and a coolant outlet branch pipe 10; the liquid cooling mechanism 2 and the liquid cooling management module 3 are electrically connected, and the liquid cooling management module 3 is used to control the liquid cooling mechanism 2 to heat or cool the coolant; the battery control module 4 and the liquid cooling management module 3 are electrically connected, the battery control module 4 and the battery module 5 are electrically connected, and the battery control module 4 is used to monitor the temperature of the battery module 5; the liquid cooling management module 3 receives the temperature monitoring signal of the battery module 5 through the battery control module 4 to adjust the temperature of the battery module 5; the battery module 5 is fixed inside the cabinet 1 through the liquid cooling support plate 6; the inlet of the coolant inlet main pipe 7 is connected to the coolant outlet of the liquid cooling mechanism 2, and the coolant inlet main pipe 7 is connected to the coolant input interface 11 of the liquid cooling support plate 6 through the coolant inlet branch pipe 8; the coolant output interface 12 of the liquid cooling support plate 6 is connected to the coolant outlet main pipe 9 through the coolant outlet branch pipe 10, and the coolant outlet main pipe 9 is connected to the coolant inlet of the liquid cooling mechanism 2. In a low-temperature environment, the liquid cooling mechanism 2 heats the coolant through the PTC heater 20; the liquid cooling management module 3 will turn on the PTC heater 20 of the liquid cooling mechanism 2 to heat the coolant. The heated coolant will pass through the coolant inlet main pipe 7, coolant inlet branch pipe 8, coolant outlet main pipe 9 and coolant outlet branch pipe 10 arranged in the energy storage system, flow through the liquid cooling support plate 6 in close contact with the bottom of the battery module 5, and transfer heat to the battery module 5 in a heat exchange manner to heat the battery module 5, thereby preventing the battery module 5 from charging or discharging at low temperature, which will significantly help to extend the service life of the energy storage product. In a high-temperature environment, the liquid cooling management module 3 turns on the fan 21 and the circulation pump 22 of the liquid cooling mechanism 2 to cool the coolant. The cooled coolant will pass through the coolant inlet main pipe 7, coolant inlet branch pipe 8, coolant outlet main pipe 9 and coolant outlet branch pipe 10 arranged in the energy storage system, flow through the liquid cooling support plate 6 in close contact with the bottom of the battery module 5, and take away the heat of the battery module 5 in a heat exchange manner to cool the battery module 5. Thereby preventing the battery module 5 from charging or discharging at high temperature, which will significantly help to extend the service life of the energy storage product.The utility model can perform efficient thermal management on all the battery cells in the energy storage system, thereby effectively avoiding the occurrence of thermal runaway of the battery cells; at the same time, it can enable the battery cells in the energy storage system to work within an ideal temperature range, thereby effectively extending the service life of the energy storage product; it can enable the battery cell temperature to get rid of the adverse effects of low ambient temperature or high ambient temperature, ensuring that the service life of the energy storage system will not be reduced; installing the energy storage system outdoors will greatly improve its safety attributes; compared with the installation of the energy storage system indoors, or in the basement, or in the garage, even if thermal runaway occurs in the energy storage system installed outdoors, it can significantly reduce the property loss or personal injury brought to consumers.

[0041] In the above text, the utility model has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the utility model, several conventional adjustments or further innovations can also be made to these specific embodiments; but as long as they do not depart from the technical concept of the utility model, the technical solutions obtained through these conventional adjustments or further innovations also fall within the protection scope of the claims of the utility model.

Claims

1. A high-pressure liquid-cooled household energy storage battery system, characterized in that: The cabinet (1) comprises a liquid cooling mechanism (2), a liquid cooling management module (3), a battery control module (4), a battery module (5), a liquid cooling support plate (6), a cooling liquid inlet main pipe (7), a cooling liquid inlet branch pipe (8), a cooling liquid outlet main pipe (9) and a cooling liquid outlet branch pipe (10); The liquid cooling mechanism (2) and the liquid cooling management module (3) are electrically connected, and the liquid cooling management module (3) is used to control the liquid cooling mechanism (2) to heat the coolant or cool the coolant; The battery control module (4) is electrically connected to the liquid cooling management module (3), and the battery control module (4) is electrically connected to the battery module (5); the battery control module (4) is used to monitor the temperature of the battery module (5); the liquid cooling management module (3) receives the temperature monitoring signal of the battery module (5) through the battery control module (4) to adjust the temperature of the battery module (5); The battery module (5) is fixed inside the cabinet (1) via the liquid cooling support plate (6); the inlet of the cooling liquid inlet main pipe (7) is connected to the cooling liquid outlet of the liquid cooling mechanism (2), and the cooling liquid inlet main pipe (7) is connected to the cooling liquid input interface (11) of the liquid cooling support plate (6) via the cooling liquid inlet branch pipe (8); the cooling liquid output interface (12) of the liquid cooling support plate (6) is connected to the cooling liquid outlet main pipe (9) via the cooling liquid outlet branch pipe (10), and the cooling liquid outlet main pipe (9) is connected to the cooling liquid inlet of the liquid cooling mechanism (2).

2. A high-pressure liquid-cooled household energy storage battery system according to claim 1, characterized in that: The bottom of the cabinet (1) is provided with a base (13), and the side of the base (13) is connected to a fixing plate (14); the front of the cabinet (1) is provided with a cabinet door (15), and the cabinet door (15) is connected to a handle (16).

3. A high-pressure liquid-cooled household energy storage battery system according to claim 2, characterized in that: A main power switch (17), a main charge and discharge interface (18) and a communication interface (19) are provided on the side of the cabinet (1); and a joint protection cover plate is connected to the outer sides of the main power switch (17), the main charge and discharge interface (18) and the communication interface (19).

4. A high-pressure liquid-cooled household energy storage battery system according to claim 1, characterized in that: The liquid cooling mechanism (2) heats the cooling liquid through a PTC heater (20); and the liquid cooling mechanism (2) cools the cooling liquid through a fan (21) and a circulation pump (22).

5. A high-pressure liquid-cooled household energy storage battery system according to claim 1, characterized in that: The battery module (5) comprises an upper cover body (23), an upper cover sealing gasket (24), a side cover body (25), a side cover sealing gasket (26) and a battery core body (27); The upper cover body (23) is fixedly connected to the liquid-cooling support plate (6) via the upper cover sealing gasket (24), and the side cover body (25) is fixedly connected to the upper cover body (23) via the side cover sealing gasket (26); the battery core (27) is fixed in a receiving space formed by the upper cover body (23), the side cover body (25) and the liquid-cooling support plate (6).

6. A high-pressure liquid-cooled household energy storage battery system according to claim 5, characterized in that: The side cover body (25) is provided with a positive charging and discharging interface (28), a negative charging and discharging interface (29) and a voltage detection connector (30).

7. A high-pressure liquid-cooled household energy storage battery system according to claim 5, characterized in that: The battery core (27) comprises a plurality of single cells (31), wherein insulating epoxy plates (33) are provided between the single cells (31); the single cells (31) are connected in series and in parallel via connecting sheets (32); and the exterior of the single cells (31) is fixed via a battery pack plastic steel belt (34).

8. A high-pressure liquid-cooled household energy storage battery system according to claim 7, characterized in that: An aluminum end plate (35) is provided at the end of the battery core (27), and the aluminum end plate (35) and the connecting plate (32) are isolated by an insulating bakelite (36); the aluminum end plate (35) is connected to the module fixing strip (38) on the liquid cooling support plate (6) via a battery fixing screw (37).

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