CN220209079U - Liquid cooling energy storage device - Google Patents

Abstract

The utility model discloses a liquid cooling energy storage device. The liquid cooling energy storage device comprises: a mounting cavity for mounting a battery is formed in the cylinder body, a liquid inlet and a liquid outlet are formed in the cylinder body, and the liquid inlet and the liquid outlet are communicated with the mounting cavity; a liquid storage cavity is formed in the liquid storage box; the main pipeline is communicated with the liquid storage cavity; one end of the first branch and one end of the second branch are connected with the liquid inlet and outlet, and one end of the first branch and one end of the second branch are communicated with the main pipeline; the first control valve is used for controlling the on-off of the first branch; the second control valve is used for controlling the on-off of the second branch; when the driving pump rotates positively, the first control valve is opened, the second control valve is closed, and the driving pump drives the medium in the main pipeline to flow to the cylinder body; when the driving pump reverses, the second control valve is opened, the first control valve is closed, and the driving pump drives the medium in the main pipeline to flow to the liquid storage tank. According to the liquid cooling energy storage device, the working efficiency of liquid injection and liquid discharge is improved, and the risk of medium pollution is reduced.

Description

Liquid cooling energy storage device

Technical Field

The utility model relates to the technical field of liquid cooling energy storage devices, in particular to a liquid cooling energy storage device.

Background

The principle of the immersed liquid cooling energy storage device is that flowing cooling liquid is adopted to directly completely immerse the battery, the cooling liquid contacts with the surface of the battery and flows, heat of the battery core is taken away in the flowing process, the heat is emitted into the air through a temperature control system, and finally the purpose of controlling the temperature of the battery is achieved. In the scheme of the existing immersed liquid cooling energy storage device, when a battery needs to be replaced or maintained, the cooling liquid is generally discharged manually, and after the battery is replaced or maintained, the system is required to be injected again manually. The maintenance difficulty of the liquid cooling energy storage device is greatly increased in the process, and meanwhile, the risk of pollution of the cooling liquid is increased in the process of discharging/injecting the cooling liquid.

Disclosure of Invention

The present utility model aims to solve at least one of the above-mentioned technical problems in the related art to some extent. Therefore, the liquid cooling energy storage device provided by the utility model improves the working efficiency of liquid injection and liquid discharge, and simultaneously reduces the risk of medium pollution.

The liquid cooling energy storage device according to the embodiment of the utility model comprises: the device comprises a cylinder body, a liquid storage tank, a main pipeline, a first branch, a second branch, a first control valve, a second control valve and a driving pump, wherein an installation cavity for installing a battery is formed in the cylinder body, a liquid inlet and a liquid outlet are formed in the cylinder body, and the liquid inlet and the liquid outlet are communicated with the installation cavity; a liquid storage cavity is formed in the liquid storage box; the main pipeline is communicated with the liquid storage cavity; the first branch and the second branch are arranged in parallel, one end of the first branch and one end of the second branch are connected with the liquid inlet and outlet, and one end of the first branch and one end of the second branch are communicated with the main pipeline; the first control valve is arranged on the first branch and used for controlling the on-off of the first branch; the second control valve is arranged on the second branch and used for controlling the on-off of the second branch; the driving pump is arranged on the main pipeline, and when the driving pump rotates positively, the first control valve is opened, the second control valve is closed, and the driving pump drives a medium in the main pipeline to flow to the cylinder body; when the driving pump reverses, the second control valve is opened, the first control valve is closed, and the driving pump drives the medium in the main pipeline to flow to the liquid storage tank.

According to the liquid cooling energy storage device provided by the embodiment of the utility model, when the driving pump rotates positively, the first control valve is opened, the second control valve is closed, and the driving pump drives a medium in the main pipeline to flow to the cylinder body; when the driving pump reverses, the second control valve is opened, the first control valve is closed, the driving pump drives the medium in the main pipeline to flow to the liquid storage tank, the medium can circularly flow between the cylinder body and the liquid storage cavity through the driving pump, the first control valve and the second control valve, the manual liquid injection and liquid discharge work in the maintenance process of the battery system is omitted, the working efficiency of liquid injection and liquid discharge is improved, and the risk of pollution to the medium is reduced.

According to some embodiments of the utility model, the cylinder body is provided with a liquid return port, the liquid return port is communicated with the installation cavity, the liquid return port is positioned above the liquid inlet and outlet port, and the liquid return port is communicated with the liquid storage cavity through a recovery flow path.

According to some embodiments of the utility model, the first control valve is a shut-off valve; or the first control valve is a one-way valve, and the one-way valve allows the medium to flow from the main pipeline to the liquid inlet and outlet.

According to some embodiments of the utility model, the second control valve is a shut-off valve.

According to some embodiments of the utility model, a liquid level detecting member is arranged in the mounting cavity, the liquid level detecting member is used for detecting the liquid level height in the mounting cavity, and the second control valve is closed when the liquid level height in the mounting cavity is lower than a preset liquid level value.

According to some embodiments of the utility model, the liquid-cooled energy storage device further comprises a water cooler disposed on the main pipeline and configured to deliver cooling energy to the main pipeline.

According to some embodiments of the utility model, the top of the cylinder is provided with a first breather valve that closes when the pressure in the mounting chamber is within a first target pressure range and opens when the pressure in the mounting chamber is outside the first target pressure range.

According to some embodiments of the utility model, a second breather valve is provided at the top of the reservoir, the second breather valve being closed when the pressure in the reservoir is within a second target pressure range and being open when the pressure in the reservoir is outside the second target pressure range.

According to some embodiments of the utility model, the liquid-cooled energy storage device further comprises a battery mounted within the mounting cavity, the top surface of the battery being lower than the set height of the liquid return port.

According to some embodiments of the utility model, the plurality of cylinders are provided, the liquid inlets and the liquid outlets of the plurality of cylinders are connected to the main pipeline through the corresponding first branch and the corresponding second branch, and the liquid return ports of the plurality of cylinders are connected to the liquid storage cavity through the corresponding recovery flow paths.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

FIG. 1 is a schematic diagram of a liquid-cooled energy storage device according to an embodiment of the present utility model in a normal operating state;

FIG. 2 is a schematic diagram of a liquid-cooled energy storage device in a maintenance service condition according to an embodiment of the present utility model;

fig. 3 is a flow chart of a liquid-cooled energy storage device according to an embodiment of the utility model in a maintenance service condition.

Reference numerals: the liquid cooling energy storage device 100, the cylinder 10, the cylinder one 101, the cylinder two 102, the cylinder three 103, the installation cavity 11, the liquid inlet and outlet 12, the liquid return port 13, the first breather valve 14, the liquid storage tank 20, the liquid storage cavity 21, the second breather valve 22, the main pipeline 30, the first branch 31, the second branch 32, the first control valve 33, the second control valve 34, the main pipeline 35, the driving pump 40, the water cooler 50, the recovery flow path 60, the battery 70 and the medium 80.

Detailed Description

Embodiments of the present utility model 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 and intended to explain the present utility model and should not be construed as limiting the utility model.

A liquid-cooled energy storage device 100 according to an embodiment of the utility model is described in detail below in conjunction with fig. 1-3.

Referring to fig. 1-2, a liquid-cooled energy storage device 100 according to an embodiment of the present utility model may include: cylinder 10, tank 20, main line 30, first branch 31, second branch 32, first control valve 33, second control valve 34, and drive pump 40. Wherein a mounting cavity 11 for mounting the battery 70 is formed in the cylinder 10. Alternatively, as shown in fig. 1, a plurality of batteries 70 are immersed in the cylinder 10, and the plurality of batteries 70 can be cooled simultaneously by one cylinder 10, thereby saving the structural cost. The cylinder body 10 is provided with a liquid inlet and a liquid outlet 12, and the liquid inlet and the liquid outlet 12 are communicated with the installation cavity 11. Optionally, the bottom of the cylinder 10 is provided with a liquid inlet 12, and a medium 80, such as a cooling liquid, enters the cylinder 10 through the liquid inlet 12, and the medium 80 exchanges heat with the battery 70 in the installation cavity 11 to reduce the temperature of the battery 70. When maintenance or repair of the battery 70 in the cylinder 10 is required, the medium 80 may be discharged through the inlet/outlet 12. By arranging the liquid inlet and outlet 12, liquid inlet and liquid outlet in the cylinder body 10 can be realized, the openings on the cylinder body 10 are reduced, and the cost is saved.

The liquid storage cavity 21 is formed in the liquid storage box 20, and the medium 80 can be stored in the liquid storage cavity 21, so that the medium 80 is prevented from being polluted. The main pipe 30 communicates with the reservoir chamber 21, and the medium 80 in the reservoir chamber 21 flows into the installation chamber 11 of the cylinder 10 through the main pipe 30.

The first branch 31 and the second branch 32 are arranged in parallel, one end of the first branch 31 and one end of the second branch 32 are connected with the liquid inlet and outlet 12, and one end of the first branch 31 and one end of the second branch 32 are communicated with the main pipeline 30. Optionally, the medium 80 in the tank 20 enters the cylinder 10 through the main pipe 30, the first branch 31, and the inlet/outlet 12 (e.g., in the direction f1 in fig. 1), and the medium 80 in the cylinder 10 may exit the cylinder 10 through the inlet/outlet 12, the second branch 32, and the main pipe 30 and enter the tank 20 (e.g., in the direction f2 in fig. 2). Alternatively, the first branch 31 and the second branch 32 may be directly connected to the liquid inlet/outlet 12, or, as shown in fig. 1, the first branch 31 and the second branch 32 may be indirectly connected to the liquid inlet/outlet 12 through a main pipe 35.

The first control valve 33 is disposed in the first branch 31, and the first control valve 33 is used for controlling on-off of the first branch 31; the second control valve 34 is disposed in the second branch 32, and the second control valve 34 is used for controlling on/off of the second branch 32. Alternatively, the first control valve 33 is opened, the medium 80 may flow into the cylinder 10, the first control valve 33 is closed, and the medium 80 cannot flow into the cylinder 10 through the first branch 31. The second control valve 34 is open and the medium 80 can exit the cylinder 10 through the second branch 32, the second control valve 34 is closed and the medium 80 cannot exit the cylinder 10 from the second branch 32.

The driving pump 40 is disposed on the main pipe 30, and when the driving pump 40 rotates forward, the first control valve 33 is opened, the second control valve 34 is closed, and the driving pump 40 drives the medium 80 in the main pipe 30 to flow toward the cylinder 10 (in the direction f1 shown in fig. 1); when the drive pump 40 is reversed, the second control valve 34 is opened and the first control valve 33 is closed, and the drive pump 40 drives the medium 80 in the main line 30 to flow into the tank 20 (in the direction f2 shown in fig. 2). By arranging the driving pump 40, the first control valve 33 and the second control valve 34, the medium 80 can circulate between the cylinder body 10 and the liquid storage tank 20, so that the automation of liquid injection and liquid discharge of the cylinder body 10 can be realized, the manual liquid injection and liquid discharge work in the maintenance process of a battery system is omitted, and the working efficiency of liquid injection and liquid discharge is improved. At the same time, the medium 80 discharged from the cylinder 10 is stored in the tank 20, reducing the risk of contamination of the medium 80.

According to the liquid cooling energy storage device 100 of the embodiment of the utility model, when the driving pump 40 rotates forward, the first control valve 33 is opened, the second control valve 34 is closed, and the driving pump 40 drives the medium 80 in the main pipeline 30 to flow to the cylinder 10; when the driving pump 40 is reversed, the second control valve 34 is opened, the first control valve 33 is closed, the driving pump 40 drives the medium 80 in the main pipeline 30 to flow towards the liquid storage tank 20, and the medium 80 can circularly flow between the cylinder 10 and the liquid storage cavity 21 by arranging the driving pump 40, the first control valve 33 and the second control valve 34, so that the manual liquid injection and liquid discharge work in the maintenance process of the battery 70 system is omitted, the working efficiency of liquid injection and liquid discharge is improved, and the risk of pollution of the medium 80 is reduced.

In some embodiments of the present utility model, referring to fig. 1-2, a liquid return port 13 is formed on the cylinder 10, the liquid return port 13 is communicated with the installation cavity 11, the liquid return port 13 is located above the liquid inlet/outlet port 12, and the liquid return port 13 is communicated with the liquid storage cavity 21 through a recovery flow path 60. Alternatively, the liquid return port 13 may be located directly above the liquid inlet 12 or obliquely above the liquid outlet 12, where the liquid return port 13 is located at a higher level than the liquid inlet 12, as shown in fig. 1, and the liquid return port 13 is located on the side wall of the cylinder 10. In this way, the medium 80 enters the installation cavity 11 from the liquid inlet and outlet 12 and exchanges heat with the battery 70 in the installation cavity 11, the medium 80 with high temperature can be discharged from the liquid return port 13 along the f3 direction in fig. 1 and stored into the liquid storage cavity 21 along the recovery flow path 60, and the cooled medium 80 can flow back to the installation cavity 11 through the main pipeline 30 and the first branch circuit 31. Through the liquid return port 13 and the recovery flow path 60, the medium 80 can circularly flow between the cylinder body 10 and the liquid storage tank 20, so that heat exchange circulation between the medium 80 and the battery 70 in the cylinder body 10 is realized, and the heat exchange efficiency of the liquid cooling energy storage device 100 is improved.

In some embodiments of the present utility model, referring to fig. 1-2, the first control valve 33 is a shut-off valve that is opened and the medium 80 can flow into or out of the cylinder 10 through the inlet/outlet 12 and the first branch 31. Alternatively, when the first control valve 33 is opened and the pump 40 is driven to rotate in the forward direction, the medium 80 may flow into the cylinder 10 through the first branch 31. When the first control valve 33 is opened and the pump 40 is driven to reverse rotation, the medium 80 can flow out of the cylinder 10 through the first branch 31. When the shut-off valve is open, the first branch 31 corresponds to a flow channel for the medium 80, the flow direction of the medium 80 being dependent on the direction of rotation of the drive pump 40. When the first control valve 34 is closed, the first branch 32 is not vented.

In some embodiments, the first control valve 33 is a one-way valve and the one-way valve allows the medium 80 to flow from the main conduit 30 to the inlet and outlet 12 such that the first branch 31 only allows the medium 80 to flow from the main conduit 30 to the inlet and outlet 12 and into the mounting chamber 11 of the cylinder 10, and does not allow the medium 80 in the mounting chamber 11 to flow through the first branch 31 to the reservoir 20.

In some embodiments of the present utility model, as shown with reference to fig. 1-2, the second control valve 34 is a shut-off valve. The shut-off valve is opened and the medium 80 can flow into or out of the cylinder 10 through the inlet and outlet 12 and the second branch 32. Alternatively, when the second control valve 34 is opened and the pump 40 is driven to rotate in the forward direction, the medium 80 may flow into the cylinder 10 through the second branch 32. When the second control valve 34 is opened and the pump 40 is driven in reverse, the medium 80 can flow out of the cylinder 10 through the second branch 32. When the shut-off valve is open, the second branch 32 corresponds to a flow path for the medium 80, the flow direction of the medium 80 depending on the direction of rotation of the drive pump 40. When the second control valve 34 is closed, the second branch 32 is not vented.

In some embodiments of the present utility model, a liquid level detecting member is provided in the installation cavity 11, and the liquid level detecting member is used for detecting the liquid level in the installation cavity 11, and the second control valve 34 is closed when the liquid level in the installation cavity 11 is lower than a preset liquid level value. Optionally, the preset liquid level value is 0. For example, when the battery 70 needs maintenance or repair, the medium 80 in the cylinder 10 needs to be emptied, at this time, the second control valve 34 is opened, the medium 80 is discharged out of the cylinder 10 through the second branch 32, the liquid level detecting member detects the liquid level of the medium 80 in the installation cavity 11, and when the liquid level in the installation cavity 11 is lower than a preset liquid level value, it indicates that the medium 80 in the installation cavity 11 is emptied, and the second control valve 34 is closed, so that maintenance or repair can be performed on the battery 70.

In some embodiments of the present utility model, referring to fig. 1-2, the liquid-cooled energy storage device 100 further includes a water cooler 50, the water cooler 50 is disposed on the main pipeline 30, and the water cooler 50 is used to deliver cold to the main pipeline 30. Alternatively, the high temperature medium 80 in the liquid storage tank 20 is cooled by the water cooler 50 to form a low temperature medium 80, and then the low temperature medium 80 enters the cylinder 10 through the main pipeline 30, and the water cooler 50 enables the medium 80 in the cylinder 10 to exchange heat with the battery 70 repeatedly.

In some embodiments of the present utility model, referring to fig. 1-2, the top of the cylinder 10 is provided with a first breather valve 14, the first breather valve 14 being closed when the pressure in the installation chamber 11 is within a first target pressure range, and being opened when the pressure in the installation chamber 11 is outside the first target pressure range. Alternatively, the first target pressure range is 60Mpa-100Mpa, and the above range is only an example, and different first target pressure ranges may be selected according to the actual application scenario of the cylinder 10. The first breather valve 14 serves to balance the pressure inside and outside the cylinder 10. When the pressure of the first breather valve 14 in the installation cavity 11 is within the first target pressure range, the first breather valve 14 is closed, indicating that the pressure in the installation cavity 11 is normal. When the pressure of the first breather valve 14 in the installation cavity 11 is outside the first target pressure range, it indicates that the pressure in the installation cavity 11 is abnormal, for example, is too large, and the first breather valve 14 needs to be opened to balance the atmospheric pressure inside and outside the cylinder 10, so as to protect the safety of the cylinder 10 and prevent the cylinder 10 from being broken due to the excessive internal pressure.

In some embodiments of the present utility model, referring to fig. 1-2, a second breather valve 22 is provided at the top of the accumulator tank 20, the second breather valve 22 being closed when the pressure in the accumulator chamber 21 is within a second target pressure range, and being opened when the pressure in the accumulator chamber 21 is outside the second target pressure range. Alternatively, the second target pressure range is 50Mpa-100Mpa, which is just an example, and different second target pressure ranges may be selected according to the actual application scenario of the tank 20. The high temperature medium 80 discharged from the installation cavity 11 is stored in the liquid storage cavity 21, and when the pressure of the second breather valve 22 in the liquid storage cavity 21 is in the second target pressure range, the second breather valve 22 is closed, so that the pressure in the liquid storage cavity 21 is normal. When the pressure of the second breather valve 22 in the installation cavity 11 is outside the second target pressure range, it indicates that the pressure in the liquid storage cavity 21 is abnormal, for example, is too large, and the second breather valve 22 needs to be opened to balance the atmospheric pressure inside and outside the liquid storage cavity 21, so as to protect the safety of the liquid storage tank 20 and prevent the liquid storage tank 20 from being broken due to the too large internal pressure.

In some embodiments of the present utility model, referring to fig. 1-2, the liquid-cooled energy storage device 100 may further include a battery 70, where the battery 70 is installed in the installation cavity 11, and the top surface of the battery 70 is lower than the setting height of the liquid return opening 13. As shown in fig. 1, the top surface of the battery 70 is located below the liquid return port 13, so that the battery 70 is ensured to be completely immersed in the medium 80, the battery 70 is fully contacted with the medium 80, the heat exchange efficiency is improved, and the structure cost is saved.

In some embodiments of the present utility model, referring to fig. 1-2, the plurality of cylinders 10 are shown, the liquid inlet and outlet ports 12 of the plurality of cylinders 10 are connected to the main pipeline 30 through the corresponding first branch 31 and second branch 32, and the liquid return ports 13 of the plurality of cylinders 10 are connected to the liquid storage cavity 21 through the corresponding recovery flow paths 60. As shown in fig. 1 and 2, the liquid-cooled energy storage device 100 includes three cylinders 10, the three cylinders 10 being a first cylinder 101, a second cylinder 102, and a third cylinder 103, each cylinder 10 inputting the medium 80 through a respective first branch 31, each cylinder 10 discharging the medium 80 through a respective second branch 32. Each cylinder 10 communicates with the liquid storage chamber 21 through the liquid return port 13 and the recovery flow path 60 to realize heat exchange circulation. The plurality of cylinders 10 share one liquid storage tank 20, so that the utilization rate of the liquid storage tank 20 is improved, the structural cost is reduced, and the volume of the liquid cooling energy storage device 100 is reduced.

In some embodiments, the liquid-cooled energy storage device 100 may further include a controller electrically connected to the drive pump 40, the second control valve 34, the first breather valve 14, the second breather valve 22, the water chiller 50, and the level detector, respectively. Specifically, the controller may control the rotational direction of the drive pump 40; the controller controls the opening or closing of the second branch 32 by controlling the on-off of the second control valve 34; the controller protects the cylinder 10 by controlling the opening or closing of the first breather valve 14; the controller protects the reservoir 20 by controlling the opening or closing of the second breather valve 22; the controller can control the water cooler 50 to be turned on or off; the controller may control the opening or closing of the liquid level detecting member, and the controller controls the second control valve 34 to be closed after the liquid level detecting member detects that the medium 80 in the accommodating chamber 11 is emptied.

In the normal operation mode of the liquid cooling energy storage device 100, the controller controls the driving pump 40 to rotate forward, and the second control valve 34 on the second branch 32 is always in a closed state. The cooling liquid uniformly flows into the cylinder body 10 through the main pipeline 30, the first branch pipeline 31 and the main pipeline 35, when the liquid level of the cooling liquid in the cylinder body 10 is higher than that of the liquid return port 13, the cooling liquid flows into the liquid storage tank 20 through the liquid return port 13 and the recovery flow path 60 due to the action of self gravity, the cooling liquid at the bottom of the liquid storage tank 20 is conveyed into the cylinder body 10 again by the driving pump 40, so that the whole cooling cycle is formed, and the hot cooling liquid is cooled into low-temperature cooling liquid by the water cooling machine 50 in the cycle. The coolant circulation loop is called positive circulation in the normal operation mode.

In the maintenance service mode, as shown in fig. 3, the pump 40 is driven to reverse so that the coolant is reversely circulated, and the reverse circulation coolant flows in the opposite direction to the forward circulation. For example, when the battery 70 in the first cylinder 101 needs to be maintained and the cooling liquid in the first cylinder 101 needs to be discharged, the second control valve 34 is opened. The driving pump 40 is reversed, the cooling liquid in the cylinder 10 is injected into the liquid storage tank 20 through the main pipeline 35, the second branch pipeline 32 and the main pipeline 30, so that the cooling liquid in the cylinder 10 is emptied, when the liquid level detection part detects that the liquid level in the mounting cavity 11 is lower than a preset liquid level value, the second control valve 34 is closed, the oil pump stops running, and at the moment, the cylinder 10 can be opened to carry out maintenance or overhaul work.

A specific embodiment of the liquid-cooled energy storage device 100 according to the present utility model will be described below using the medium 80 as a cooling liquid.

The liquid-cooled energy storage device 100 includes: the hydraulic pump comprises a cylinder body 10, a storage tank 20, a main pipeline 30, a first branch 31, a second branch 32, a one-way valve, a shutoff valve and a drive pump 40. Wherein a mounting chamber 11 for mounting the batteries 70 is formed in the cylinder 10, and a plurality of batteries 70 are mounted in the mounting chamber 11. The bottom of the cylinder body 10 is provided with a liquid inlet and outlet 12, and cooling liquid enters the cylinder body 10 through the liquid inlet and outlet 12, and the cooling liquid in the installation cavity 11 exchanges heat with the battery 70 in the installation cavity 11 so as to reduce the temperature of the battery 70. The side wall of the cylinder body 10 is provided with a liquid return port 13, the liquid return port 13 is communicated with the mounting cavity 11, the liquid return port 13 is positioned obliquely above the liquid inlet and outlet 12, the liquid return port 13 is communicated with the liquid storage cavity 21 through a recovery flow path 60, and the setting height of the liquid return port 13 is higher than the top surface height of the battery 70. The installation cavity 11 is internally provided with a liquid level detection piece, the liquid level detection piece is used for detecting the liquid level height in the installation cavity 11, and the shutoff valve is closed when the liquid level height in the installation cavity 11 is lower than a preset liquid level value. The top of the cylinder 10 is provided with a first breather valve 14, the first breather valve 14 being closed when the pressure in the installation chamber 11 is within a first target pressure range, and being opened when the pressure in the installation chamber 11 is outside the first target pressure range.

The liquid storage cavity 21 is formed in the liquid storage tank 20, the liquid storage cavity 21 is communicated with the main pipeline 30, the first branch pipe 31 and the second branch pipe 32 are arranged in parallel, one end of the first branch pipe 31 and one end of the second branch pipe 32 are connected with the liquid inlet and outlet 12, and the other end of the first branch pipe 31 and the other end of the second branch pipe 32 are communicated with the main pipeline 30. The one-way valve is arranged on the first branch 31 and used for controlling the on-off of the first branch 31, and the one-way valve allows the medium 80 to flow from the main pipeline 30 to the liquid inlet and outlet 12; the second control valve 34 is disposed in the second branch 32 and is used for controlling on/off of the second branch 32. The top of the reservoir 20 is provided with a second breather valve 22, the second breather valve 22 being closed when the pressure in the reservoir 21 is within a second target pressure range, and being opened when the pressure in the reservoir 21 is outside the second target pressure range.

The driving pump 40 is arranged on the main pipeline 30, and when the driving pump 40 rotates positively, the one-way valve is opened, the shutoff valve is closed, and the driving pump 40 drives the medium 80 in the main pipeline 30 to flow to the cylinder body 10 through the first branch pipeline 31 and the main pipeline 35; when the drive pump 40 is reversed, the shutoff valve is opened, and the drive pump 40 drives the medium 80 in the cylinder 10 to flow to the tank 20 through the main line 35, the second branch line 32, and the main line 30.

The liquid cooling energy storage device 100 further includes a water cooler 50, where the water cooler 50 is disposed on the main pipeline 30 and is used for delivering cold to the main pipeline 30. The liquid-cooled energy storage device 100 may further include a controller electrically connected to the drive pump 40, the second control valve 34, the first breathing valve 14, the second breathing valve 22, and the liquid level detecting member, respectively. The liquid cooling energy storage device 100 comprises a first cylinder 101, a second cylinder 102 and a third cylinder 103, each cylinder 10 is filled with liquid through a corresponding first branch 31, each cylinder 10 is discharged through a corresponding second branch 32, and each cylinder 10 is communicated with the liquid storage cavity 21 through a corresponding liquid return port 13 and a recycling flow path 60 to realize heat exchange circulation.

In the description of the present specification, a description referring to terms "one embodiment," "some 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A liquid-cooled energy storage device, comprising:

the battery pack comprises a cylinder body (10), wherein a mounting cavity (11) for mounting a battery (70) is formed in the cylinder body (10), a liquid inlet and outlet (12) is formed in the cylinder body (10), and the liquid inlet and outlet (12) is communicated with the mounting cavity (11);

a liquid storage tank (20), wherein a liquid storage cavity (21) is formed in the liquid storage tank (20);

a main pipeline (30), wherein the main pipeline (30) is communicated with the liquid storage cavity (21);

the device comprises a first branch (31) and a second branch (32), wherein the first branch (31) and the second branch (32) are arranged in parallel, one end of the first branch (31) and one end of the second branch (32) are connected with the liquid inlet and outlet (12), and one end of the first branch (31) and one end of the second branch (32) are communicated with the main pipeline (30);

the first control valve (33) is arranged on the first branch circuit (31) and used for controlling the on-off of the first branch circuit (31);

the second control valve (34) is arranged on the second branch (32) and used for controlling the on-off of the second branch (32);

a drive pump (40), wherein the drive pump (40) is arranged on the main pipeline (30), and when the drive pump (40) rotates forward, the first control valve (33) is opened, the second control valve (34) is closed, and the drive pump (40) drives a medium (80) in the main pipeline (30) to flow to the cylinder body (10); when the driving pump (40) is reversed, the second control valve (34) is opened, the first control valve (33) is closed, and the driving pump (40) drives the medium (80) in the main pipeline (30) to flow to the liquid storage tank (20).

2. The liquid cooling energy storage device according to claim 1, wherein the cylinder body (10) is provided with a liquid return port (13), the liquid return port (13) is communicated with the installation cavity (11), the liquid return port (13) is located above the liquid inlet and outlet port (12), and the liquid return port (13) is communicated with the liquid storage cavity (21) through a recovery flow path (60).

3. The liquid cooled energy storage device of claim 1, wherein the first control valve (33) is a shut-off valve; or the first control valve (33) is a one-way valve, and the one-way valve allows the medium (80) to flow from the main pipeline (30) to the liquid inlet and outlet (12).

4. The liquid cooled energy storage device of claim 1, wherein the second control valve (34) is a shut-off valve.

5. The liquid-cooled energy storage device according to claim 1, wherein a liquid level detection member is arranged in the installation cavity (11), the liquid level detection member is used for detecting the liquid level height in the installation cavity (11), and the second control valve (34) is closed when the liquid level height in the installation cavity (11) is lower than a preset liquid level value.

6. The liquid cooled energy storage device of claim 1, further comprising a water cooler (50), the water cooler (50) being disposed on the main conduit (30) and configured to deliver cooling energy to the main conduit (30).

7. The liquid cooled energy storage device according to claim 1, characterized in that the top of the cylinder (10) is provided with a first breather valve (14), the first breather valve (14) being closed when the pressure in the installation cavity (11) is within a first target pressure range, and being opened when the pressure in the installation cavity (11) is outside the first target pressure range.

8. The liquid cooled energy storage device according to claim 1, characterized in that a second breather valve (22) is provided at the top of the reservoir (20), the second breather valve (22) being closed when the pressure in the reservoir chamber (21) is within a second target pressure range and being opened when the pressure in the reservoir chamber (21) is outside the second target pressure range.

9. The liquid-cooled energy storage device of claim 2, further comprising a battery (70), wherein the battery (70) is mounted in the mounting cavity (11), and wherein a top surface of the battery (70) is lower than a set height of the liquid return port (13).

10. The liquid-cooled energy storage device according to claim 2, wherein the plurality of cylinders (10) is provided, the liquid inlet and outlet ports (12) of the plurality of cylinders (10) are connected to the main pipeline (30) through respective corresponding first branch circuits (31) and second branch circuits (32), and the liquid return ports (13) of the plurality of cylinders (10) are connected to the liquid storage cavity (21) through respective corresponding recovery flow paths (60).