CN220963498U

CN220963498U - Immersed liquid cooling energy storage system

Info

Publication number: CN220963498U
Application number: CN202322749072.3U
Authority: CN
Inventors: 周强; 王情伟; 姬海瑞; 胡傲生
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-05-14
Anticipated expiration: 2033-10-12

Abstract

The application discloses an immersed liquid cooling energy storage system, and belongs to the technical field of energy storage systems. The immersed liquid cooling energy storage system comprises a liquid storage tank, a battery pack and a battery management unit, wherein cooling liquid is arranged in the liquid storage tank; the battery pack is at least partially immersed in the cooling liquid in the liquid storage tank; the battery management unit is electrically connected with the battery pack by a connecting wire penetrating through the top of the liquid storage tank and is arranged outside the liquid storage tank. The battery management unit is arranged outside the liquid storage tank, the battery pack is positioned in cooling liquid immersed in the liquid storage tank, and the battery management unit and the battery pack are electrically connected by utilizing a connecting wire penetrating through the top of the liquid storage tank, so that the heat dissipation effect of the battery pack is ensured, and the battery management unit is convenient to maintain.

Description

Immersed liquid cooling energy storage system

Technical Field

The application belongs to the technical field of energy storage systems, and particularly relates to an immersed liquid cooling energy storage system.

Background

As the environmental protection concept goes deeper, the application of electric energy as a clean energy source is becoming more widespread, so the technology as a battery pack for realizing electric energy storage is also iterating continuously. The battery pack comprises a BMU (Battery Management Unit, a battery management unit) and a plurality of batteries which are connected in parallel or in series, wherein the BMU is used for monitoring, controlling and protecting the batteries, however, the battery pack usually generates a large amount of heat in the working process, so that a heat dissipation structure is required to be arranged in the battery pack to realize cooling.

At present, in order to ensure the heat dissipation effect on the battery pack, immersion liquid cooling is often adopted, namely, the whole battery pack is soaked in flowing cooling liquid, so that the cooling liquid is fully contacted with the surface of the battery, and the heat on the surface of the battery is taken away by utilizing the flowing of the cooling liquid. However, since the whole battery pack is immersed in the cooling liquid, when the BMU needs to be maintained, the battery pack needs to be subjected to liquid discharge treatment, which results in complicated and difficult maintenance steps.

Disclosure of utility model

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides an immersed liquid cooling energy storage system, which is arranged outside a liquid storage tank through a battery management unit, wherein a battery pack is positioned in cooling liquid immersed in the liquid storage tank, and the battery management unit is electrically connected with the battery pack by a connecting wire penetrating through the top of the liquid storage tank, so that the heat dissipation effect of the battery pack is ensured, and meanwhile, the battery management unit is convenient to maintain.

In a first aspect, the present application provides an immersion liquid cooled energy storage system comprising:

The liquid storage tank is internally provided with cooling liquid;

A battery pack at least partially submerged in the cooling liquid in the liquid reservoir;

And the battery management unit is electrically connected with the battery pack by utilizing a connecting wire penetrating through the top of the liquid storage tank and is arranged outside the liquid storage tank.

According to the immersed liquid cooling energy storage system, the battery management unit is arranged outside the liquid storage tank, the battery pack is positioned in cooling liquid immersed in the liquid storage tank, and the battery management unit and the battery pack are electrically connected by utilizing the connecting wire penetrating through the top of the liquid storage tank, so that the heat dissipation effect of the battery pack is ensured, and meanwhile, the battery management unit is convenient to maintain.

According to one embodiment of the application, the tank comprises:

The box, inject the stock solution chamber in the box, the height in stock solution chamber is H, the stock solution intracavity the coolant liquid height is H, satisfies following relation: h is less than or equal to H.

According to one embodiment of the application, the housing has a pre-load area that selectively mounts at least one of the battery management unit or the window.

According to one embodiment of the present application, further comprising:

the battery management unit is arranged on the outer wall of the liquid storage tank or the shell;

The radiator is arranged in the accommodating cavity, a liquid outlet of the radiator is communicated with a liquid inlet of the liquid storage tank, and the liquid inlet of the radiator is communicated with a liquid outlet of the liquid storage tank and is used for cooling the cooling liquid;

And the driving pump is used for driving the cooling liquid to circularly flow.

According to one embodiment of the application, the battery pack comprises a plurality of battery modules arranged at intervals along the height direction; the liquid storage tank further comprises:

The tray is installed in the liquid storage tank, the tray corresponds to the battery modules one by one to support the corresponding battery modules, a flow channel is arranged in the tray, a liquid inlet of the flow channel is communicated with a liquid outlet of the radiator, and the liquid outlet of the flow channel is used for spraying cooling liquid to the corresponding battery modules.

According to one embodiment of the present application, the battery module includes a plurality of batteries arranged at intervals in a width direction; the runner includes main runner and tributary way, the tray includes:

The first bracket is internally provided with the main runner, and a liquid inlet of the main runner is communicated with a liquid outlet of the radiator;

The second supports are arranged at intervals along the width direction, each battery is arranged between two adjacent second supports, the branch flow channels are arranged in the second supports, liquid inlets of the branch flow channels are communicated with liquid outlets of the main flow channels, and the liquid outlets of the branch flow channels are used for spraying cooling liquid to the adjacent batteries.

According to one embodiment of the application, the upper surface of the second bracket is provided with a plurality of liquid spraying holes along the length direction.

According to one embodiment of the present application, further comprising:

The liquid inlet pipeline is arranged in the accommodating cavity, a liquid inlet of the liquid inlet pipeline is communicated with a liquid outlet of the radiator, and a liquid outlet of the liquid inlet pipeline is communicated with a liquid inlet of a flow channel of the tray;

The liquid outlet pipeline is arranged in the liquid storage tank, and a liquid outlet of the liquid outlet pipeline is communicated with a liquid inlet of the radiator.

According to one embodiment of the application, the side wall of the liquid outlet pipeline is provided with a plurality of liquid inlet holes at intervals along the width direction.

According to one embodiment of the present application, further comprising:

The energy storage converter is arranged in the accommodating cavity and is electrically connected with the battery pack and the battery management unit respectively;

And the electric box is arranged in the accommodating cavity and is respectively and electrically connected with the battery management unit, the battery pack and the energy storage converter.

According to one embodiment of the present application, the top of the liquid storage tank is provided with a wiring hole, and the liquid storage tank further comprises:

The connecting wire is in sealing fit with the wiring hole, one end of the connecting wire penetrates through the wiring hole to be connected with the battery pack, and the other end of the connecting wire is connected with the battery management unit.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural diagram of an immersion liquid cooling energy storage system according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of an immersion liquid cooling energy storage system according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a liquid storage tank according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a part of a tank body with a hidden part of a liquid storage tank provided by an embodiment of the application;

Fig. 5 is a schematic diagram of a structure in which a battery module and a tray provided in an embodiment of the present application cooperate;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

Fig. 7 is a schematic structural diagram of a liquid outlet pipeline according to an embodiment of the present application.

Reference numerals:

100. A housing; 101. a receiving chamber; 102. a heat radiation hole; 110. a door panel; 120. a housing body;

200. A liquid storage tank; 210. a case; 211. a preassembly area; 212. a wiring hole; 220. a tray; 221. a first bracket; 2210. a liquid inlet of the main runner; 222. a second bracket; 2221. a liquid spraying hole;

300. A heat sink;

401. A battery module; 4011. a battery;

500. A battery management unit;

600. a liquid inlet pipeline; 610. a connecting pipeline;

700. A liquid outlet pipeline; 701. a liquid inlet hole; 702. a liquid outlet of the liquid outlet pipeline;

800. an energy storage converter; 900. an electrical box.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

An immersion liquid-cooled energy storage system provided by an embodiment of the present application is described below with reference to fig. 1-7, and includes a liquid storage tank 200, a battery pack, and a battery management unit 500.

The liquid tank 200 is provided with a cooling liquid. It will be appreciated that the size and shape of the tank 200 may be designed according to practical requirements, and this embodiment is not particularly limited. The cooling liquid may be at least one of a fluorinated liquid, deionized water, and a nonflammable oil. Wherein the fluorinated liquid may include, but is not limited to, hydrochlorofluorocarbons, hydrofluorocarbons, perfluorocarbons, hydrofluoroethers, or the like (the non-flammable oils may include, but are not limited to, mineral oils, synthetic oils, or natural oils, etc.).

The battery pack is at least partially immersed in the cooling fluid in the reservoir 200. That is, the battery pack is used for storing and providing electric energy, so that the battery pack is completely or partially immersed in the cooling liquid in the liquid storage tank 200, the cooling liquid is directly contacted with the surface of the battery pack to improve the heat dissipation efficiency as much as possible, and the surface of the battery pack can be fully contacted with the cooling liquid under the condition that the battery pack is completely immersed in the cooling liquid, so that the heat dissipation effect is further improved.

The battery management unit 500 is electrically connected to the battery pack using a connection wire passing through the top of the liquid storage tank 200 to realize monitoring, control and protection of the battery pack.

It may be appreciated that, in some embodiments, when the liquid storage tank 200 is designed in a closed structure, the top of the liquid storage tank 200 is provided with the wiring hole 212, so that the connection wire can penetrate through the top of the liquid storage tank 200 to realize the electrical connection between the battery pipeline unit 500 and the battery pack, and considering that the cooling liquid expands when exchanging heat, the cooling liquid is arranged at the top of the liquid storage tank 200 through the wiring hole 212, and a certain pressure relief effect can be achieved, so that the sealing reliability of the liquid storage tank 200 is ensured as much as possible, and the service life of the cooling liquid is prolonged. It is understood that the number and shape of the wiring holes 212 can be designed according to practical requirements, and the present embodiment is not particularly limited thereto. In other embodiments, the tank 200 may be of an open structure, i.e., the top of the tank 200 is an opening through which the connecting lines pass, and the opening may be used for pressure relief and fluid replenishment.

It can be appreciated that, the battery management unit 500 is located outside the liquid storage tank 200, and the battery pack is located in the liquid storage tank 200, so that the battery management unit 500 can be conveniently replaced and overhauled without discharging liquid, thereby ensuring the heat dissipation effect of the battery pack and simultaneously facilitating maintenance of the battery management unit 500. It should be noted that, the battery management unit 500 may be located outside the liquid storage tank 200, or the battery management unit 500 may be disposed on an outer wall of the liquid storage tank 200, or may be disposed on another component located outside the liquid storage tank 200, which is not particularly limited in this embodiment.

According to the submerged liquid cooling energy storage system provided by the embodiment of the application, the battery management unit 500 is arranged outside the liquid storage tank 200, the battery pack is positioned in the cooling liquid submerged in the liquid storage tank 200, and the electric connection between the battery management unit 500 and the battery pack is realized by utilizing the connecting wire penetrating through the top of the liquid storage tank 200, so that the heat dissipation effect of the battery pack is ensured, and meanwhile, the battery management unit 500 is convenient to maintain.

In some embodiments, the liquid storage tank 200 includes a tank body 210, a liquid storage cavity is defined in the tank body 210, the height of the liquid storage cavity is H, and the height of the cooling liquid in the liquid storage cavity is H, so that the following relationship is satisfied: h is less than or equal to H. When the case 210 has a closed structure, the wiring hole 212 is connected to the liquid storage chamber.

It can be appreciated that H is less than or equal to H, so that the cooling liquid is prevented from filling the whole liquid storage cavity, that is, a certain space exists at the top of the liquid storage cavity, the internal pressure and the external pressure of the box body 210 are conveniently balanced, the situation that the box body 210 is extruded and overflows even due to expansion of the cooling liquid during heat exchange is avoided, and the sealing reliability of the box body 210 is ensured.

It should be noted that, four side plates connected in sequence are arranged around the periphery of the bottom plate so as to place the battery pack, and after the cooling liquid is added, top plates are connected to the four side plates so as to form the box 210, and the bottom plate, the side plates and the top plates are welded and connected so as to ensure the sealing reliability of the box 210.

In some embodiments, the top plate of the liquid storage tank 200 may be further provided with a pressure relief hole for further improving the pressure relief effect.

In this embodiment, when the box 210 is in a closed structure, in order to realize that the battery management unit 500 is electrically connected with the battery pack through the wiring hole 212, the wiring hole 212 is provided at the top of the box 210, the submerged liquid cooling energy storage system further includes a connecting wire, the connecting wire is in sealing fit with the wiring hole 212, one end of the connecting wire penetrates through the wiring hole 212 to be connected with the battery pack, and the other end of the connecting wire is connected with the battery management unit 500, namely, the electric connection between the two is realized in a wired manner. It should be noted that, the sealing fit between the connection wire and the connection hole 212 includes, but is not limited to, sealing with a sealant. Connection lines include, but are not limited to, signal lines and/or power lines.

It will be appreciated that when the battery management unit 500 is disposed on a side of the side plate remote from the battery pack, the wiring holes 212 may be formed at the top of the side plate, which is simple to route and requires a short length of connection wires. However, considering that the wiring hole 212 is formed at the top of the side plate, the hidden trouble of the leakage point of the box 210 is increased, and the corrosion of the sealant caused by the cooling liquid and the natural aging of the sealant exist, so that the reliability of the box 210 is insufficient.

Of course, in some embodiments, the electrical connection between the battery pack and the battery management unit 500 may also be achieved in a wireless manner, so that, considering that the influence of the cooling liquid on the wireless transmission is great, one end of the connecting wire placed in the liquid storage tank 200 extends out of the liquid storage tank 200 from the wire connection hole 212, thereby ensuring the stability of the electrical connection between the battery pack and the battery management unit 500. Illustratively, the connection line is an antenna.

In some embodiments, the case 210 has a pre-load area 211, and the pre-load area 211 optionally mounts at least one of the battery management unit 500 or the window.

It will be appreciated that the pre-installation area 211 is disposed on the side plate, and a window can be installed at the pre-installation area 211 to facilitate the user to observe the height of the cooling liquid in the liquid storage tank 200, so as to timely supplement or discharge the cooling liquid, further ensure the heat dissipation effect on the battery pack, and of course, the battery management unit 500 can also be installed at the pre-installation area 211 by gluing or vacuum adsorption, etc. in consideration of the installation reliability of the box 210 affected by the installation window. It should be noted that the size, shape and number of the pre-fabricated areas 211 may be designed according to practical requirements, which is not particularly limited in this embodiment.

In some embodiments, to increase the heat dissipation efficiency of the battery pack, the submerged liquid-cooled energy storage system further comprises a housing 100, a heat sink 300, and a drive pump.

It may be understood that the housing 100 defines a receiving chamber 101, the liquid storage tank 200 is mounted in the receiving chamber 101, the battery management unit 500 is mounted on an outer wall of the liquid storage tank 200 or the housing 100, and the receiving chamber 101 is used for protecting and dust-proof the liquid storage tank 200, the heat sink 300, the battery pack, and the battery management unit 500. The material of the housing 100 may include, but is not limited to, stainless steel, aluminum alloy, titanium alloy, or the like. It should be noted that, the size and shape of the accommodating cavity 101 may be designed according to practical requirements, which is not particularly limited in this embodiment.

In this embodiment, for convenience of maintenance and repair, the housing 100 includes a door panel 110 and a housing body 120 connected to the door panel 110, the housing body 120 is provided with an opening communicating with the accommodating chamber 101, and the door panel 110 is installed at the opening. It should be noted that, the specific connection manner of the door panel 110 and the housing body 120 includes, but is not limited to, a rotation shaft connection, which is not limited in this embodiment.

The battery management unit 500 may be mounted on a side plate of the case 210 near the opening, may be mounted on the case body 120, and may be mounted on the door panel 110, which is not particularly limited in this embodiment. It should be noted that, when the battery management unit 500 is mounted to the housing 100, the processing of the liquid storage tank 200 may be simplified, and the production and maintenance costs may be reduced. Among them, the connection manner between the battery management unit 500 and the case 100 includes, but is not limited to, a screw connection, a rivet connection, a snap connection, or the like.

The radiator 300 is installed in the accommodating cavity 101, and a liquid outlet of the radiator 300 is communicated with a liquid inlet of the liquid storage tank 200, and a liquid inlet of the radiator 300 is communicated with a liquid outlet of the liquid storage tank 200 for cooling the cooling liquid. It is understood that the radiator 300 can assist the high temperature coolant in releasing heat and cooling, and the type of radiator 300 includes, but is not limited to, an air-cooled radiator, a heat pipe radiator, a liquid-cooled radiator, or the like.

The driving pump is used for driving the cooling liquid to circularly flow. It should be noted that the driving pump may be integrally disposed with the radiator 300, so as to further improve the compactness of the entire submerged liquid-cooled energy storage system.

It should be noted that, when the electric energy in the battery pack is small, that is, the heat release amount of the battery pack is lower than or equal to the natural heat absorption amount of the cooling liquid in the liquid storage tank 200 during the operation of the battery pack, the radiator 300 and the driving pump are not required to be used for forcedly cooling the cooling liquid in the liquid storage tank 200; when the demand of the user for electric energy increases or the heat release amount of the single battery pack is higher than the natural heat absorption amount of the cooling liquid in the liquid storage tank 200, the cooling liquid in the liquid storage tank 200 is forcedly cooled by adding the radiator 300 and the driving pump so as to ensure the heat dissipation effect of the battery pack. Whether the radiator 300 and the driving pump are needed to be added or not is flexibly selected according to the electric energy, the application range and the scene of the whole immersed liquid cooling energy storage system are improved, and the maintenance cost is reduced.

It will be appreciated that the driving pump, the radiator 300 and the liquid storage tank 200 may be connected end to form a circulation loop, and the cooling liquid may circulate in the circulation loop, that is, the driving pump drives the cooling liquid with low temperature to flow into the liquid inlet of the liquid storage tank 200 from the liquid outlet of the radiator 300, the cooling liquid exchanges heat through the battery pack to reduce the temperature of the surface of the battery pack, and meanwhile, the cooling liquid with high temperature flows back to the liquid inlet of the radiator 300 from the liquid outlet of the liquid storage tank 200 to cool.

In some embodiments, based on the factor of space utilization, the radiator 300 and the liquid storage tank 200 are stacked, and a certain height distance space exists between the radiator 300 and the liquid storage tank 200 for avoiding the wiring hole 212, so as to facilitate wiring and emergency pressure relief.

In some embodiments, in order to satisfy the storage capacity of the battery pack and the power demand of the user, the battery pack includes a plurality of battery modules 401 arranged at intervals in the height direction as shown in fig. 3 to 5; the liquid storage tank 200 further includes a plurality of trays 220, and a liquid storage cavity is defined in the tank 210; the tray 220 is installed in the liquid storage cavity, the tray 220 and the battery modules 401 are in one-to-one correspondence to support the corresponding battery modules 401, a runner is arranged in the tray 220, a liquid inlet of the runner is communicated with a liquid outlet of the radiator 300, and the liquid outlet of the runner is used for spraying cooling liquid to the corresponding battery modules 401. The materials of the case 210 and the tray 220 may include, but are not limited to, stainless steel, aluminum alloy, titanium alloy, etc. It should be noted that the number of the battery modules 401 may be designed according to practical requirements, and the present embodiment is not particularly limited thereto.

In this embodiment, in order to make the power distribution more flexible and reliable, a plurality of battery management units 500 are provided, and the battery management units 500 may correspond to the battery modules 401 one by one, or two or more battery modules 401 may share one battery management unit 500. When a plurality of battery management units 500 are disposed, the arrangement sequence of the battery management units 500 outside the liquid storage tank 200 may be consistent with the arrangement sequence of the corresponding battery modules 401, so as to facilitate maintenance.

It can be understood that the flow channels are connected in parallel, the cooling liquid flows into the liquid inlet of the flow channel from the liquid outlet of the radiator 300, and then is sprayed on the surface of the battery module 401 from the liquid outlet of the flow channel, and meanwhile, the sprayed cooling liquid is collected in the liquid storage cavity, so as to reduce the temperature in the whole liquid storage cavity. In addition, on one hand, the tray 220 plays a role of supporting the battery module 401, and on the other hand, the tray 220 is integrated with a runner, so that a pipeline structure of independently setting a working cooling liquid runner is avoided, the cost is saved, and the space utilization rate is improved.

In some embodiments, as shown in fig. 3 and 4, the battery module 401 includes a plurality of batteries 4011 arranged at intervals in the width direction, and the batteries 4011 are connected in series or parallel to each other to increase the storage capacity of the entire battery module 401.

In some embodiments, as shown in fig. 5, in order to secure the temperature uniformity of the battery module 401, the flow channel includes a main flow channel and a sub flow channel, and the tray 220 includes a first support 221 and a plurality of second supports 222 spaced apart in the width direction. Two ends of the first bracket 221 are respectively connected with one side, close to the two side plates, of the box 210, which are arranged at intervals along the width direction, and a main runner is arranged in the first bracket 221, and a liquid inlet 2210 of the main runner is communicated with a liquid outlet of the radiator 300; the second brackets 222 are installed on the first brackets 221, each battery 4011 is installed between two adjacent second brackets 222, a branch runner is arranged in the second brackets 222, a liquid inlet of the branch runner is communicated with a liquid outlet of the main runner, and the liquid outlet of the branch runner is used for spraying cooling liquid to the adjacent battery 4011.

It can be understood that the cooling liquid uniformly flows into the liquid inlets 2210 of the main channels from the liquid outlet of the radiator 300, then uniformly flows into the liquid inlets of all the branch channels corresponding to the main channels through the liquid outlets of the main channels, and finally is sprayed out from the liquid outlets of the branch channels.

It should be noted that, because the batteries 4011 are installed in the two adjacent second brackets 222, not only a heat dissipation gap is reserved between the two adjacent batteries 4011, but also the liquid outlet of one branch flow channel can spray the cooling liquid to the two batteries 4011 at the same time, so that the heat exchange between the batteries 4011 and the cooling liquid is ensured to be sufficient, and the compactness of the structure is improved.

As shown in fig. 4, the left-right direction in the present application is the width direction, the front-rear direction is the length direction, and the up-down direction is the height direction, unless otherwise specified.

In some embodiments, as shown in fig. 6, considering that the battery 4011 includes a plurality of electric cells arranged at intervals along the length direction, the upper surface of the second bracket 222 is provided with a plurality of liquid spraying holes 2221 along the length direction, that is, the liquid spraying holes 2221 are liquid outlets of the branch flow channels, and the cooling liquid is sprayed to the electric cells at the same time, so that the efficiency of spraying the cooling liquid is improved, the heat exchange efficiency is further improved, and the temperature of the battery 4011 is rapidly reduced. It is to be understood that the number and shape of the liquid spraying holes 2221 may be designed according to practical requirements, and this embodiment is not particularly limited.

In some embodiments, to achieve the communication between the liquid outlet of the liquid storage tank 200 and the liquid inlet of the radiator 300, and the communication between the liquid outlet of the radiator 300 and the liquid inlet 2210 of the main runner, as shown in fig. 3, 4 and 7, the submerged liquid cooling energy storage system further includes a liquid inlet pipe 600 and a liquid outlet pipe 700, the liquid inlet pipe 600 is disposed in the accommodating cavity 101, the liquid inlet of the liquid inlet pipe 600 is communicated with the liquid outlet of the radiator 300, and the liquid outlet of the liquid inlet pipe 600 is communicated with the liquid inlet of the runner of the tray 220; the liquid outlet pipe 700 is installed on the case 210, and the liquid outlet 702 of the liquid outlet pipe is communicated with the liquid inlet of the radiator 300.

It can be understood that the liquid outlets of the liquid inlet pipeline 600 are in one-to-one correspondence with the liquid inlets 2210 of the main flow channel, that is, the cooling liquid flows into the main flow channel and all the corresponding branch flow channels after sequentially passing through the liquid inlets of the liquid inlet pipeline 600 and the liquid outlets of the liquid inlet pipeline 600 from the liquid outlet of the radiator 300, and then is ejected from the liquid outlets of the branch flow channels, and meanwhile, the cooling liquid in the liquid storage cavity passes through the liquid inlets of the radiator 300 through the liquid outlets 702 of the liquid outlet pipeline and flows into the radiator 300 for cooling.

It should be noted that, in some embodiments, as shown in fig. 4, the liquid inlet pipeline 600 is disposed in the accommodating cavity 101 and is located outside the liquid storage tank 200, the submerged liquid cooling energy storage system further includes a connecting pipeline 610, the connecting pipeline 610 corresponds to the liquid inlet port 2210 of the main flow channel one by one, the side plate of the liquid storage tank 200 is provided with a first mounting hole corresponding to the connecting pipeline 610, one end of the connecting pipeline 610 penetrates through the first mounting hole to extend into the liquid storage tank 200 to be communicated with the flow channel of the tray 220, and the other end is communicated with the liquid outlet of the liquid inlet pipeline 600, so as to facilitate maintenance of the liquid inlet pipeline 600.

Considering that the mounting holes formed in the side plates may increase the hidden trouble of the leakage point of the tank 210, thereby resulting in insufficient reliability of the tank 210, in some embodiments, the liquid inlet pipeline 600 and the connecting pipeline 610 may be both disposed in the liquid storage tank 200, and the top plate of the liquid storage tank 200 is provided with a connecting hole, where one end of the liquid inlet pipeline 600 passes through the connecting hole to extend out of the liquid storage tank 200, so that the liquid inlet of the liquid inlet pipeline 600 is communicated with the liquid outlet of the radiator 300, so as to improve the sealing reliability of the liquid storage tank 200.

Similarly, in some embodiments, the top plate or the side plate of the case 210 is provided with a second mounting hole, that is, one end of the liquid outlet pipe 700 extends out of the liquid storage tank 200 through the second mounting hole, so that the liquid outlet 702 of the liquid outlet pipe is communicated with the liquid inlet of the radiator 300.

In some embodiments, the outlet line 700 is located in an upper portion of the reservoir. It should be noted that, considering that the hot air tends to move upwards, the liquid outlet pipeline 700 is located at the upper portion of the liquid storage device, so that heat exchange can be further guaranteed to be sufficient, and the heat exchange effect in the whole liquid storage cavity is improved.

In some embodiments, as shown in fig. 7, the side wall of the liquid outlet pipe 700 is provided with a plurality of liquid inlet holes 701 at intervals along the width direction, that is, the liquid inlet holes 701 are liquid inlet holes of the liquid outlet pipe 700, and by providing a plurality of liquid inlet holes 701 to enable the liquid outlet pipe 700 to flow into the cooling liquid at the same time, the efficiency and uniformity of the flowing of the cooling liquid are improved, the heat exchange efficiency is further improved, and the temperature of the battery 4011 is rapidly reduced. It is to be understood that the number and shape of the liquid inlet holes 701 can be designed according to practical requirements, which is not particularly limited in this embodiment.

In some embodiments, as shown in fig. 2, the submerged liquid-cooled energy storage system further includes an energy storage converter 800 and an electrical box 900, where the energy storage converter 800 is installed in the accommodating cavity 101 and is electrically connected to the battery pack and the battery management unit 500, respectively; the electric box 900 is installed in the receiving chamber 101 and is electrically connected to the battery management unit 500, the battery pack, and the energy storage converter 800, respectively.

The energy storage converter 800 (Power Conversion System, PCS) is used to control the charging and discharging process of the battery 4011, to perform ac-dc conversion, and to directly supply power to the ac load in the absence of a power grid.

The electrical cabinet is used for providing power for the whole immersed liquid cooling energy storage system, and functions of a switch and the like.

In this embodiment, the energy storage converter 800, the radiator 300, the liquid storage tank 200 and the battery 4011 are stacked in the accommodating cavity 101 from top to bottom in order to fully improve the space utilization.

Considering that the energy storage converter 800 can generate a large amount of heat during operation, as shown in fig. 1 and 2, the door panel 110 and/or the shell body 120 are provided with a plurality of uniformly distributed heat dissipation holes 102, so as to further improve heat exchange between the accommodating cavity 101 and the outside, and reduce the operating temperature in the accommodating cavity 101 by air cooling.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the application, a "first feature" or "second feature" may include one or more of such features.

In the description of the present application, "plurality" means two or more.

In the description of the application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An immersion liquid cooled energy storage system, comprising:

The liquid storage tank is internally provided with cooling liquid;

2. The immersion liquid cooled energy storage system of claim 1, wherein the tank comprises:

3. The submerged liquid-cooled energy storage system of claim 2, wherein the tank has a pre-load area that selectively mounts at least one of the battery management unit or the window.

4. A submerged liquid-cooled energy storage system as claimed in any one of claims 1 to 3 further comprising:

The radiator is arranged in the accommodating cavity, a liquid outlet of the radiator is communicated with a liquid inlet of the liquid storage tank, and the liquid inlet of the radiator is communicated with a liquid outlet of the liquid storage tank and is used for cooling the cooling liquid; and the driving pump is used for driving the cooling liquid to circularly flow.

5. The submerged liquid cooled energy storage system of claim 4, wherein the battery pack comprises a plurality of battery modules arranged at intervals in a height direction; the liquid storage tank further comprises:

6. The submerged liquid cooled energy storage system of claim 5, wherein the battery module comprises a plurality of batteries arranged at intervals in a width direction; the runner includes main runner and tributary way, the tray includes:

7. The submerged liquid cooled energy storage system of claim 6, wherein the upper surface of the second support is provided with a plurality of liquid spray holes along the length direction.

8. The submerged liquid-cooled energy storage system of claim 5, further comprising:

9. The submerged liquid cooled energy storage system of claim 8, wherein the side walls of the liquid outlet pipe are provided with a plurality of liquid inlet holes at intervals along the width direction.

10. The submerged liquid-cooled energy storage system of claim 4, further comprising:

11. A submerged liquid-cooled energy storage system as claimed in any one of claims 1 to 3 wherein a wiring hole is provided in the top of the tank, the submerged liquid-cooled energy storage system further comprising: